All pairs of domain combinations at the superfamily level are listed here.
The identification of domain pairs does not account for the possibility of non-contiguous domains. Inserted, or interlaced, domains are seen as having a simple pair ordering.
The links below permit the addition or removal of specific sets of domain combination pairs.
Change the list of genome two-letter codes in the 'Include genomes' box to include domain-pairs from those genomes.
Change the list of genomes in the 'Exclude genomes' box to exclude domain-pairs from those genomes.
List of all two-letter genome codes.
| Superfamily (N) | Superfamily (C) | Number of occurrances | Number unique | |
| Immunoglobulin | Immunoglobulin | 11625 | 47 |  |
| Retrovirus capsid protein, N-terminal core domain | Retrovirus capsid dimerization domain-like | 2873 | 4 |  |
| MHC antigen-recognition domain | Immunoglobulin | 2142 | 3 |  |
| Actin-like ATPase domain | Actin-like ATPase domain | 1954 | 16 |  |
| PX domain | CAD & PB1 domains | 1534 | 143 |  |
| NAD(P)-binding Rossmann-fold domains | Glyceraldehyde-3-phosphate dehydrogenase-like, C-terminal domain | 1517 | 6 |  |
| Thioredoxin-like | GST C-terminal domain-like | 1490 | 11 |  |
| P-loop containing nucleoside triphosphate hydrolases | P-loop containing nucleoside triphosphate hydrolases | 1334 | 85 |  |
| GroEL equatorial domain-like | GroEL apical domain-like | 1302 | 4 |  |
| GroEL-intermediate domain like | GroEL apical domain-like | 1292 | 2 |  |
| GroEL equatorial domain-like | GroEL-intermediate domain like | 1292 | 2 |  |
| (Trans)glycosidases | Glycosyl hydrolase domain | 1280 | 33 |  |
| Enolase N-terminal domain-like | Enolase C-terminal domain-like | 1254 | 6 |  |
| Periplasmic binding protein-like II | Clavaminate synthase-like | 1217 | 21 |  |
| Thiolase-like | Thiolase-like | 1154 | 25 |  |
| Tubulin nucleotide-binding domain-like | Tubulin C-terminal domain-like | 1130 | 2 |  |
| Single hybrid motif | Peripheral subunit-binding domain of 2-oxo acid dehydrogenase complex | 1057 | 27 |  |
| Nicotinic receptor ligand binding domain-like | Neurotransmitter-gated ion-channel transmembrane pore | 970 | 4 |  |
| Translation proteins SH3-like domain | Nucleic acid-binding proteins | 910 | 4 |  |
| dsRNA-binding domain-like | Ribosomal protein S5 domain 2-like | 888 | 6 |  |
| Periplasmic binding protein-like II | Tudor/PWWP/MBT | 883 | 18 |  |
| Prokaryotic type KH domain (KH-domain type II) | Ribosomal protein S3 C-terminal domain | 868 | 4 |  |
| Ribosomal protein L6 | Ribosomal protein L6 | 864 | 2 |  |
| GroES-like | NAD(P)-binding Rossmann-fold domains | 854 | 7 |  |
| Ribonuclease H-like | DNA/RNA polymerases | 847 | 8 |  |
| NAD(P)-binding Rossmann-fold domains | LDH C-terminal domain-like | 818 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | C-terminal domain of alpha and beta subunits of F1 ATP synthase | 816 | 5 |  |
| N-terminal domain of alpha and beta subunits of F1 ATP synthase | P-loop containing nucleoside triphosphate hydrolases | 809 | 4 |  |
| N-terminal domain of alpha and beta subunits of F1 ATP synthase | C-terminal domain of alpha and beta subunits of F1 ATP synthase | 809 | 4 |  |
| FAD/NAD(P)-binding domain | FAD-linked reductases, C-terminal domain | 784 | 13 |  |
| Thiamin diphosphate-binding fold (THDP-binding) | Thiamin diphosphate-binding fold (THDP-binding) | 768 | 9 |  |
| Homeodomain-like | Tetracyclin repressor-like, C-terminal domain | 761 | 9 |  |
| NAD(P)-binding Rossmann-fold domains | 6-phosphogluconate dehydrogenase C-terminal domain-like | 751 | 10 |  |
| Cupredoxins | Cupredoxins | 737 | 24 |  |
| vWA-like | 727 | 77 |  |
| Insulin-like | 719 | 2 |  |
| Inosine monophosphate dehydrogenase (IMPDH) | Inosine monophosphate dehydrogenase (IMPDH) | 717 | 2 |  |
| Rhodanese/Cell cycle control phosphatase | Rhodanese/Cell cycle control phosphatase | 717 | 2 |  |
| Putative DNA-binding domain | P-loop containing nucleoside triphosphate hydrolases | 709 | 1 |  |
| Positive stranded ssRNA viruses | 689 | 4 |  |
| Insert subdomain of RNA polymerase alpha subunit | RBP11-like subunits of RNA polymerase | 689 | 5 |  |
| Formate/glycerate dehydrogenase catalytic domain-like | NAD(P)-binding Rossmann-fold domains | 663 | 9 |  |
| Glutathione synthetase ATP-binding domain-like | PreATP-grasp domain | 660 | 19 |  |
| Aminoacid dehydrogenase-like, N-terminal domain | NAD(P)-binding Rossmann-fold domains | 599 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | 585 | 46 |  |
| Galactose-binding domain-like | (Trans)glycosidases | 583 | 32 |  |
| RuBisCO, large subunit, small (N-terminal) domain | RuBisCo, C-terminal domain | 567 | 1 |  |
| Metallo-dependent hydrolases | Composite domain of metallo-dependent hydrolases | 553 | 9 |  |
| PsbU/PolX domain-like | Nucleotidyltransferase | 544 | 3 |  |
| L domain-like | Fibronectin type III | 543 | 31 |  |
| P-loop containing nucleoside triphosphate hydrolases | Translation proteins | 543 | 27 |  |
| FAD/NAD(P)-binding domain | FAD/NAD-linked reductases, dimerisation (C-terminal) domain | 542 | 14 |  |
| DNA polymerase beta, N-terminal domain-like | Nucleotidyltransferase | 538 | 3 |  |
| (Trans)glycosidases | Galactose mutarotase-like | 534 | 15 |  |
| DNA polymerase beta, N-terminal domain-like | PsbU/PolX domain-like | 530 | 2 |  |
| DNA clamp | DNA clamp | 506 | 4 |  |
| L9 N-domain-like | Ribosomal protein L9 C-domain | 500 | 2 |  |
| C2 domain (Calcium/lipid-binding domain, CaLB) | 494 | 47 |  |
| Acyl-CoA dehydrogenase NM domain-like | Acyl-CoA dehydrogenase C-terminal domain-like | 482 | 11 |  |
| beta-Galactosidase/glucuronidase domain | (Trans)glycosidases | 456 | 15 |  |
| Galactose-binding domain-like | beta-Galactosidase/glucuronidase domain | 456 | 15 |  |
| Fe,Mn superoxide dismutase (SOD), N-terminal domain | Fe,Mn superoxide dismutase (SOD), C-terminal domain | 445 | 2 |  |
| Ribosomal L11/L12e N-terminal domain | Ribosomal protein L11, C-terminal domain | 444 | 4 |  |
| DNA/RNA polymerases | Lesion bypass DNA polymerase (Y-family), little finger domain | 436 | 1 |  |
| Thiamin diphosphate-binding fold (THDP-binding) | DHS-like NAD/FAD-binding domain | 433 | 2 |  |
| Immunoglobulin | Immunoglobulin | 410 | 2 |  |
| Glutamine synthetase, N-terminal domain | Glutamine synthetase/guanido kinase | 404 | 2 |  |
| PK beta-barrel domain-like | Phosphoenolpyruvate/pyruvate domain | 387 | 5 |  |
| PK beta-barrel domain-like | PK C-terminal domain-like | 387 | 5 |  |
| Phosphoenolpyruvate/pyruvate domain | PK C-terminal domain-like | 387 | 5 |  |
| ARM repeat | 385 | 19 |  |
| DPP6 N-terminal domain-like | alpha/beta-Hydrolases | 384 | 3 |  |
| Insert subdomain of RNA polymerase alpha subunit | C-terminal domain of RNA polymerase alpha subunit | 382 | 1 |  |
| RBP11-like subunits of RNA polymerase | C-terminal domain of RNA polymerase alpha subunit | 382 | 1 |  |
| LuxS/MPP-like metallohydrolase | LuxS/MPP-like metallohydrolase | 379 | 6 |  |
| (Trans)glycosidases | 373 | 33 |  |
| PUA domain-like | SET domain | 370 | 38 |  |
| FAD/NAD(P)-binding domain | FAD/NAD(P)-binding domain | 369 | 10 |  |
| Cyclin-like | Cyclin-like | 368 | 8 |  |
| (Trans)glycosidases | 360 | 8 |  |
| beta-Galactosidase/glucuronidase domain | beta-Galactosidase/glucuronidase domain | 355 | 5 |  |
| Periplasmic binding protein-like II | Periplasmic binding protein-like II | 354 | 13 |  |
| beta-lactamase/transpeptidase-like | SpoIIaa-like | 337 | 3 |  |
| (Trans)glycosidases | Chitinase insertion domain | 336 | 12 |  |
| Bromodomain | FYVE/PHD zinc finger | 335 | 6 |  |
| Galactose-binding domain-like | Galactose mutarotase-like | 335 | 9 |  |
| FAD-binding/transporter-associated domain-like | FAD-linked oxidases, C-terminal domain | 334 | 3 |  |
| E set domains | (Trans)glycosidases | 330 | 22 |  |
| Nucleotidyltransferase | PAP/OAS1 substrate-binding domain | 319 | 12 |  |
| Fibronectin type III | Fibronectin type III | 316 | 16 |  |
| Galactose-binding domain-like | 316 | 6 |  |
| Single hybrid motif | FAD/NAD-linked reductases, dimerisation (C-terminal) domain | 311 | 7 |  |
| beta-Galactosidase/glucuronidase domain | Galactose mutarotase-like | 310 | 3 |  |
| beta-Galactosidase/glucuronidase domain | 309 | 3 |  |
| Riboflavin synthase domain-like | Ferredoxin reductase-like, C-terminal NADP-linked domain | 299 | 12 |  |
| Sec63 N-terminal domain-like | E set domains | 299 | 12 |  |
| gp120 core | 299 | 8 |  |
| Ribosomal protein S5 domain 2-like | Ribonuclease PH domain 2-like | 297 | 6 |  |
| Galactose mutarotase-like | 295 | 2 |  |
| PreATP-grasp domain | Rudiment single hybrid motif | 291 | 11 |  |
| Glutathione synthetase ATP-binding domain-like | Rudiment single hybrid motif | 291 | 11 |  |
| TAF(II)230 TBP-binding fragment | Bromodomain | 289 | 8 |  |
| CO dehydrogenase flavoprotein C-terminal domain-like | CO dehydrogenase molybdoprotein N-domain-like | 288 | 2 |  |
| Head morphogenesis protein gp7 | EB1 dimerisation domain-like | 288 | 10 |  |
| Class II aaRS and biotin synthetases | Class II aaRS ABD-related | 286 | 10 |  |
| Thiamin diphosphate-binding fold (THDP-binding) | TK C-terminal domain-like | 283 | 5 |  |
| PLP-binding barrel | Alanine racemase C-terminal domain-like | 280 | 7 |  |
| LDL receptor-like module | Complement control module/SCR domain | 279 | 30 |  |
| TPR-like | TPR-like | 274 | 15 |  |
| post-HMGL domain-like | 2-isopropylmalate synthase LeuA, allosteric (dimerisation) domain | 274 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | PUA domain-like | 274 | 2 |  |
| cAMP-binding domain-like | "Winged helix" DNA-binding domain | 273 | 5 |  |
| Macro domain-like | Zn-dependent exopeptidases | 273 | 1 |  |
| Translation proteins | EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain | 273 | 10 |  |
| Periplasmic binding protein-like I | Periplasmic binding protein-like II | 272 | 10 |  |
| Protein kinase-like (PK-like) | ARM repeat | 270 | 21 |  |
| Viral glycoprotein, central and dimerisation domains | E set domains | 268 | 3 |  |
| beta-beta-alpha zinc fingers | beta-beta-alpha zinc fingers | 265 | 39 |  |
| Staphylococcal nuclease | Staphylococcal nuclease | 264 | 18 |  |
| EGF/Laminin | EGF/Laminin | 264 | 34 |  |
| GroES-like | GroES-like | 262 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain | 262 | 9 |  |
| ISP domain | Bet v1-like | 259 | 3 |  |
| Amine oxidase N-terminal region | Amine oxidase N-terminal region | 254 | 3 |  |
| Amine oxidase N-terminal region | Amine oxidase catalytic domain | 254 | 3 |  |
| Bacterial enterotoxins | Superantigen toxins, C-terminal domain | 250 | 4 |  |
| Ribosomal protein S5 domain 2-like | Ribosomal protein S5 domain 2-like | 250 | 6 |  |
| Leukotriene A4 hydrolase N-terminal domain | Metalloproteases ("zincins"), catalytic domain | 247 | 5 |  |
| Metalloproteases ("zincins"), catalytic domain | ARM repeat | 247 | 5 |  |
| Leukotriene A4 hydrolase N-terminal domain | ARM repeat | 247 | 5 |  |
| Restriction endonuclease-like | S-adenosyl-L-methionine-dependent methyltransferases | 246 | 11 |  |
| L domain-like | L domain-like | 243 | 20 |  |
| ClpP/crotonase | ClpP/crotonase | 243 | 11 |  |
| ADC-like | Cdc48 domain 2-like | 241 | 4 |  |
| EF-G C-terminal domain-like | 239 | 9 |  |
| E set domains | Glycosyl hydrolase domain | 238 | 10 |  |
| MIR domain | MIR domain | 237 | 11 |  |
| Cadherin-like | Cadherin-like | 236 | 25 |  |
| Neurotransmitter-gated ion-channel transmembrane pore | 232 | 2 |  |
| Concanavalin A-like lectins/glucanases | Concanavalin A-like lectins/glucanases | 228 | 12 |  |
| SET domain | 224 | 14 |  |
| P-loop containing nucleoside triphosphate hydrolases | EF-G C-terminal domain-like | 221 | 13 |  |
| Trypsin-like serine proteases | PDZ domain-like | 219 | 6 |  |
| Ubiquitin-like | 215 | 9 |  |
| Multidrug efflux transporter AcrB pore domain; PN1, PN2, PC1 and PC2 subdomains | Multidrug efflux transporter AcrB pore domain; PN1, PN2, PC1 and PC2 subdomains | 214 | 6 |  |
| Multidrug efflux transporter AcrB pore domain; PN1, PN2, PC1 and PC2 subdomains | Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains | 214 | 6 |  |
| Ribosomal protein S5 domain 2-like | 214 | 8 |  |
| Ubiquitin-like | Protein kinase-like (PK-like) | 214 | 6 |  |
| Multidrug efflux transporter AcrB transmembrane domain | Multidrug efflux transporter AcrB transmembrane domain | 214 | 7 |  |
| Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains | Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains | 212 | 5 |  |
| MIR domain | IP3 receptor type 1 binding core, domain 2 | 212 | 10 |  |
| Sec63 N-terminal domain-like | E set domains | 212 | 27 |  |
| Acyl-CoA N-acyltransferases (Nat) | Acyl-CoA N-acyltransferases (Nat) | 211 | 4 |  |
| ADC-like | P-loop containing nucleoside triphosphate hydrolases | 211 | 4 |  |
| Complement control module/SCR domain | Complement control module/SCR domain | 210 | 19 |  |
| Translation proteins | EF-G C-terminal domain-like | 210 | 10 |  |
| Snake toxin-like | Snake toxin-like | 209 | 8 |  |
| Cdc48 domain 2-like | P-loop containing nucleoside triphosphate hydrolases | 209 | 3 |  |
| ABC transporter transmembrane region | P-loop containing nucleoside triphosphate hydrolases | 209 | 7 |  |
| CcmK-like | CcmK-like | 208 | 2 |  |
| Eukaryotic RPB5 N-terminal domain | RPB5-like RNA polymerase subunit | 207 | 1 |  |
| Serum albumin-like | Serum albumin-like | 207 | 1 |  |
| Sigma2 domain of RNA polymerase sigma factors | Sigma3 and sigma4 domains of RNA polymerase sigma factors | 206 | 7 |  |
| Nucleotide-binding domain | FAD-linked reductases, C-terminal domain | 204 | 3 |  |
| RPB6/omega subunit-like | 204 | 1 |  |
| C2 domain (Calcium/lipid-binding domain, CaLB) | 204 | 6 |  |
| SNARE fusion complex | 203 | 24 |  |
| Plexin repeat | 203 | 12 |  |
| EGF/Laminin | Immunoglobulin | 201 | 7 |  |
| Tetrahydrobiopterin biosynthesis enzymes-like | Tetrahydrobiopterin biosynthesis enzymes-like | 200 | 1 |  |
| EF-G C-terminal domain-like | EF-G C-terminal domain-like | 199 | 14 |  |
| Nucleotidylyl transferase | Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases | 199 | 11 |  |
| P-loop containing nucleoside triphosphate hydrolases | Ribosomal protein S5 domain 2-like | 198 | 9 |  |
| ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | Ribosomal protein S5 domain 2-like | 197 | 12 |  |
| FAD/NAD(P)-binding domain | Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain | 197 | 5 |  |
| C2 domain (Calcium/lipid-binding domain, CaLB) | Protein kinase-like (PK-like) | 197 | 6 |  |
| Nucleotidylyl transferase | Nudix | 197 | 4 |  |
| C2 domain (Calcium/lipid-binding domain, CaLB) | ARM repeat | 196 | 5 |  |
| Nucleic acid-binding proteins | Class II aaRS and biotin synthetases | 195 | 6 |  |
| EGF/Laminin | Heme-dependent peroxidases | 194 | 2 |  |
| Ubiquitin-like | ARM repeat | 194 | 4 |  |
| Ubiquitin-like | C2 domain (Calcium/lipid-binding domain, CaLB) | 194 | 4 |  |
| Galactose mutarotase-like | Glycosyl hydrolase domain | 194 | 10 |  |
| Triple coiled coil domain of C-type lectins | C-type lectin-like | 193 | 2 |  |
| IP3 receptor type 1 binding core, domain 2 | 193 | 6 |  |
| Nucleoside phosphorylase/phosphoribosyltransferase N-terminal domain | Nucleoside phosphorylase/phosphoribosyltransferase catalytic domain | 192 | 4 |  |
| Aminopeptidase/glucanase lid domain | Zn-dependent exopeptidases | 191 | 1 |  |
| Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains | Multidrug efflux transporter AcrB transmembrane domain | 191 | 4 |  |
| Multidrug efflux transporter AcrB pore domain; PN1, PN2, PC1 and PC2 subdomains | Multidrug efflux transporter AcrB transmembrane domain | 191 | 4 |  |
| Putative anticodon-binding domain of alanyl-tRNA synthetase (AlaRS) | ThrRS/AlaRS common domain | 189 | 12 |  |
| Dimerization-anchoring domain of cAMP-dependent PK regulatory subunit | ARM repeat | 188 | 3 |  |
| PDZ domain-like | PDZ domain-like | 188 | 6 |  |
| PUA domain-like | eIF1-like | 188 | 3 |  |
| Clathrin heavy-chain terminal domain | ARM repeat | 188 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | PUA domain-like | 187 | 6 |  |
| Nucleic acid-binding proteins | 186 | 1 |  |
| Viral protein domain | Influenza hemagglutinin (stalk) | 186 | 2 |  |
| E set domains | 185 | 16 |  |
| Restriction endonuclease-like | Restriction endonuclease-like | 183 | 4 |  |
| Isocitrate/Isopropylmalate dehydrogenase-like | Isocitrate/Isopropylmalate dehydrogenase-like | 183 | 3 |  |
| Sigma3 and sigma4 domains of RNA polymerase sigma factors | Sigma3 and sigma4 domains of RNA polymerase sigma factors | 181 | 5 |  |
| Nucleic acid-binding proteins | P-loop containing nucleoside triphosphate hydrolases | 180 | 8 |  |
| Invasin/intimin cell-adhesion fragments | 180 | 13 |  |
| Sigma3 and sigma4 domains of RNA polymerase sigma factors | NTF2-like | 180 | 6 |  |
| E set domains | Chondroitin AC/alginate lyase | 179 | 2 |  |
| Non-globular alpha+beta subunits of globular proteins | Non-globular alpha+beta subunits of globular proteins | 176 | 1 |  |
| beta-N-acetylhexosaminidase-like domain | (Trans)glycosidases | 175 | 7 |  |
| Ribosomal proteins S24e, L23 and L15e | 175 | 2 |  |
| NAD(P)-binding Rossmann-fold domains | 174 | 14 |  |
| Beta-D-glucan exohydrolase, C-terminal domain | Anthrax protective antigen | 174 | 2 |  |
| SAM/Pointed domain | "Winged helix" DNA-binding domain | 173 | 1 |  |
| Ribosomal protein S5 domain 2-like | GHMP Kinase, C-terminal domain | 173 | 4 |  |
| Metal cation-transporting ATPase, ATP-binding domain N | HAD-like | 173 | 5 |  |
| L30e-like | 172 | 2 |  |
| Protein kinase-like (PK-like) | EF-hand | 172 | 5 |  |
| Sialidases | Six-hairpin glycosidases | 172 | 2 |  |
| Group II dsDNA viruses VP | Group II dsDNA viruses VP | 172 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | HAND domain of the nucleosome remodeling ATPase ISWI | 172 | 5 |  |
| Integrin alpha N-terminal domain | Integrin alpha N-terminal domain | 171 | 5 |  |
| Uridine diphospho-N-Acetylenolpyruvylglucosamine reductase, MurB, C-terminal domain | 171 | 19 |  |
| ARM repeat | ARM repeat | 170 | 19 |  |
| Arabinanase/levansucrase/invertase | Concanavalin A-like lectins/glucanases | 170 | 3 |  |
| Heme-dependent catalase-like | Class I glutamine amidotransferase-like | 167 | 2 |  |
| Cytidine deaminase-like | Cytidine deaminase-like | 167 | 1 |  |
| WD40 repeat-like | WD40 repeat-like | 166 | 19 |  |
| Cytochrome c oxidase subunit II-like, transmembrane region | Cupredoxins | 165 | 2 |  |
| EF-G C-terminal domain-like | Ribosomal protein S5 domain 2-like | 165 | 8 |  |
| Fibrinogen coiled-coil and central regions | Fibrinogen C-terminal domain-like | 164 | 2 |  |
| Six-hairpin glycosidases | Type I dockerin domain | 164 | 1 |  |
| Translation proteins | 163 | 2 |  |
| Zinc beta-ribbon | Zinc beta-ribbon | 163 | 2 |  |
| Translation proteins | Ribosomal protein S5 domain 2-like | 162 | 6 |  |
| R1 subunit of ribonucleotide reductase, N-terminal domain | PFL-like glycyl radical enzymes | 161 | 2 |  |
| Sigma2 domain of RNA polymerase sigma factors | 160 | 5 |  |
| Nucleotide-diphospho-sugar transferases | Trimeric LpxA-like enzymes | 159 | 4 |  |
| Heme-dependent peroxidases | Heme-dependent peroxidases | 159 | 5 |  |
| "Winged helix" DNA-binding domain | S-adenosyl-L-methionine-dependent methyltransferases | 159 | 3 |  |
| PUA domain-like | S-adenosyl-L-methionine-dependent methyltransferases | 158 | 13 |  |
| Creatinase/prolidase N-terminal domain | Creatinase/aminopeptidase | 157 | 5 |  |
| Transducin (alpha subunit), insertion domain | P-loop containing nucleoside triphosphate hydrolases | 157 | 4 |  |
| HAD-like | Calcium ATPase, transmembrane domain M | 157 | 6 |  |
| Nicotinate/Quinolinate PRTase N-terminal domain-like | Nicotinate/Quinolinate PRTase C-terminal domain-like | 157 | 2 |  |
| Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 | Eukaryotic type KH-domain (KH-domain type I) | 157 | 5 |  |
| Calcium ATPase, transduction domain A | Calcium ATPase, transmembrane domain M | 157 | 6 |  |
| Calcium ATPase, transduction domain A | HAD-like | 157 | 6 |  |
| Phage fibre proteins | Virus attachment protein globular domain | 156 | 3 |  |
| Formate dehydrogenase/DMSO reductase, domains 1-3 | ADC-like | 156 | 2 |  |
| Double Clp-N motif | P-loop containing nucleoside triphosphate hydrolases | 156 | 7 |  |
| Concanavalin A-like lectins/glucanases | 155 | 5 |  |
| Cytochrome c | Cytochrome c | 154 | 8 |  |
| GFP-like | Bcl-2 inhibitors of programmed cell death | 154 | 12 |  |
| Composite domain of metallo-dependent hydrolases | Composite domain of metallo-dependent hydrolases | 154 | 3 |  |
| Positive stranded ssRNA viruses | Positive stranded ssRNA viruses | 154 | 3 |  |
| Metal cation-transporting ATPase, ATP-binding domain N | Calcium ATPase, transmembrane domain M | 153 | 4 |  |
| Cell wall binding repeat | Cell wall binding repeat | 153 | 3 |  |
| Calcium ATPase, transduction domain A | Metal cation-transporting ATPase, ATP-binding domain N | 153 | 4 |  |
| NAD(P)-binding Rossmann-fold domains | TrkA C-terminal domain-like | 152 | 4 |  |
| MIR domain | Concanavalin A-like lectins/glucanases | 152 | 4 |  |
| NAD(P)-binding Rossmann-fold domains | 1-deoxy-D-xylulose-5-phosphate reductoisomerase, C-terminal domain | 150 | 1 |  |
| Glyceraldehyde-3-phosphate dehydrogenase-like, C-terminal domain | 1-deoxy-D-xylulose-5-phosphate reductoisomerase, C-terminal domain | 150 | 1 |  |
| NAD(P)-binding Rossmann-fold domains | UDP-glucose/GDP-mannose dehydrogenase C-terminal domain | 149 | 5 |  |
| alpha/beta-Hydrolases | Lipase/lipooxygenase domain (PLAT/LH2 domain) | 149 | 2 |  |
| E set domains | E set domains | 149 | 19 |  |
| 6-phosphogluconate dehydrogenase C-terminal domain-like | UDP-glucose/GDP-mannose dehydrogenase C-terminal domain | 149 | 5 |  |
| Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain | Succinate dehydrogenase/fumarate reductase flavoprotein C-terminal domain | 148 | 2 |  |
| FAD/NAD(P)-binding domain | Succinate dehydrogenase/fumarate reductase flavoprotein C-terminal domain | 148 | 2 |  |
| Chromo domain-like | S-adenosyl-L-methionine-dependent methyltransferases | 147 | 8 |  |
| ISP domain | 145 | 3 |  |
| IP3 receptor type 1 binding core, domain 2 | EF-hand | 144 | 3 |  |
| Concanavalin A-like lectins/glucanases | EF-hand | 144 | 3 |  |
| EF-hand | 144 | 3 |  |
| Concanavalin A-like lectins/glucanases | IP3 receptor type 1 binding core, domain 2 | 144 | 3 |  |
| MIR domain | EF-hand | 144 | 3 |  |
| Metalloproteases ("zincins"), catalytic domain | 144 | 7 |  |
| Photosystem II reaction centre subunit H, transmembrane region | PRC-barrel domain | 143 | 1 |  |
| RBP11-like subunits of RNA polymerase | 143 | 2 |  |
| ACP-like | ACP-like | 143 | 2 |  |
| Second domain of FERM | PH domain-like | 143 | 12 |  |
| N-terminal, heterodimerisation domain of RBP7 (RpoE) | Nucleic acid-binding proteins | 142 | 1 |  |
| 2Fe-2S ferredoxin-like | CO dehydrogenase ISP C-domain like | 139 | 6 |  |
| CO dehydrogenase molybdoprotein N-domain-like | Molybdenum cofactor-binding domain | 139 | 3 |  |
| Aspartate carbamoyltransferase, Regulatory-chain, N-terminal domain | Aspartate carbamoyltransferase, Regulatory-chain, C-terminal domain | 138 | 1 |  |
| Dihydrofolate reductase-like | Thymidylate synthase/dCMP hydroxymethylase | 137 | 3 |  |
| Coronavirus S2 glycoprotein | Coronavirus S2 glycoprotein | 137 | 6 |  |
| Viral protein domain | Influenza hemagglutinin (stalk) | 137 | 3 |  |
| Ubiquitin-like | Zn-binding ribosomal proteins | 135 | 4 |  |
| (Trans)glycosidases | Beta-D-glucan exohydrolase, C-terminal domain | 134 | 10 |  |
| Virus ectodomain | Virus ectodomain | 134 | 14 |  |
| Aldolase | post-HMGL domain-like | 133 | 8 |  |
| Homeodomain-like | NagB/RpiA/CoA transferase-like | 133 | 1 |  |
| CoA-dependent acyltransferases | CoA-dependent acyltransferases | 133 | 7 |  |
| Integrin domains | vWA-like | 132 | 11 |  |
| Cytochrome c | Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane anchor | 132 | 4 |  |
| Transmembrane di-heme cytochromes | a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) | 132 | 2 |  |
| ACT-like | ACT-like | 131 | 5 |  |
| gp120 core | gp120 core | 131 | 5 |  |
| Domain of poly(ADP-ribose) polymerase | ADP-ribosylation | 131 | 2 |  |
| Guanido kinase N-terminal domain | Glutamine synthetase/guanido kinase | 130 | 3 |  |
| NagB/RpiA/CoA transferase-like | NagB/RpiA/CoA transferase-like | 129 | 3 |  |
| Carboxypeptidase regulatory domain-like | YVTN repeat-like/Quinoprotein amine dehydrogenase | 128 | 2 |  |
| Enolase C-terminal domain-like | 128 | 2 |  |
| Peptidase/esterase 'gauge' domain | alpha/beta-Hydrolases | 128 | 1 |  |
| FAD-binding/transporter-associated domain-like | CO dehydrogenase flavoprotein C-terminal domain-like | 127 | 5 |  |
| PYP-like sensor domain (PAS domain) | GAF domain-like | 126 | 7 |  |
| Tudor/PWWP/MBT | Tudor/PWWP/MBT | 126 | 5 |  |
| Domain of the SRP/SRP receptor G-proteins | P-loop containing nucleoside triphosphate hydrolases | 126 | 5 |  |
| FAD-binding/transporter-associated domain-like | Molybdenum cofactor-binding domain | 125 | 9 |  |
| TNF-like | 123 | 3 |  |
| NAD-binding domain of HMG-CoA reductase | Substrate-binding domain of HMG-CoA reductase | 123 | 2 |  |
| Periplasmic binding protein-like II | Mitochondrial import receptor subunit Tom20 | 123 | 16 |  |
| Concanavalin A-like lectins/glucanases | STI-like | 123 | 2 |  |
| Ubiquitin-like | P-loop containing nucleoside triphosphate hydrolases | 123 | 11 |  |
| RNA-binding domain, RBD | RNA-binding domain, RBD | 122 | 6 |  |
| F1F0 ATP synthase subunit C | F1F0 ATP synthase subunit C | 121 | 2 |  |
| PEP carboxykinase N-terminal domain | PEP carboxykinase-like | 121 | 2 |  |
| Duffy binding domain-like | 120 | 15 |  |
| Penicillin binding protein dimerisation domain | beta-lactamase/transpeptidase-like | 120 | 5 |  |
| 2Fe-2S ferredoxin-like | alpha-helical ferredoxin | 120 | 2 |  |
| PDZ domain-like | Fibronectin type III | 117 | 4 |  |
| BRCT domain | BRCT domain | 117 | 5 |  |
| SARS receptor-binding domain-like | Coronavirus S2 glycoprotein | 117 | 4 |  |
| Nucleotidylyl transferase | Nucleotidylyl transferase | 115 | 9 |  |
| Homing endonucleases | Homing endonucleases | 115 | 5 |  |
| Plexin repeat | Integrin domains | 115 | 11 |  |
| Viral glycoprotein, central and dimerisation domains | 114 | 3 |  |
| Ricin B-like lectins | Ricin B-like lectins | 114 | 4 |  |
| Thioredoxin-like | Thioredoxin-like | 114 | 10 |  |
| PapD-like | Periplasmic chaperone C-domain | 113 | 1 |  |
| Ubiquitin-like | PH domain-like | 113 | 7 |  |
| Galactose mutarotase-like | Putative glucosidase YicI, C-terminal domain | 112 | 6 |  |
| (Trans)glycosidases | Putative glucosidase YicI, C-terminal domain | 112 | 6 |  |
| Glycosyl hydrolase domain | Putative glucosidase YicI, C-terminal domain | 112 | 6 |  |
| Leucine zipper domain | TNF-like | 112 | 21 |  |
| FabD/lysophospholipase-like | Probable ACP-binding domain of malonyl-CoA ACP transacylase | 111 | 15 |  |
| N-terminal domain of MutM-like DNA repair proteins | S13-like H2TH domain | 111 | 4 |  |
| EF-hand | 111 | 7 |  |
| NAD(P)-binding Rossmann-fold domains | NAD(P)-binding Rossmann-fold domains | 111 | 10 |  |
| Plexin repeat | vWA-like | 111 | 8 |  |
| Zn-dependent exopeptidases | Bacterial exopeptidase dimerisation domain | 110 | 1 |  |
| Galactose mutarotase-like | 109 | 4 |  |
| LuxS/MPP-like metallohydrolase | 109 | 5 |  |
| "Winged helix" DNA-binding domain | Iron-dependent repressor protein, dimerization domain | 108 | 3 |  |
| L domain-like | Growth factor receptor domain | 108 | 7 |  |
| Rudiment single hybrid motif | Single hybrid motif | 108 | 8 |  |
| Glutathione synthetase ATP-binding domain-like | Single hybrid motif | 108 | 8 |  |
| PreATP-grasp domain | Single hybrid motif | 108 | 8 |  |
| Nucleic acid-binding proteins | Nucleic acid-binding proteins | 107 | 17 |  |
| PA domain | Zn-dependent exopeptidases | 107 | 2 |  |
| Bacterial luciferase-like | Bacterial luciferase-like | 107 | 6 |  |
| TNF receptor-like | TNF receptor-like | 106 | 7 |  |
| NAD(P)-binding Rossmann-fold domains | TrkA C-terminal domain-like | 106 | 3 |  |
| EF-hand | 106 | 11 |  |
| "Winged helix" DNA-binding domain | Periplasmic binding protein-like II | 106 | 2 |  |
| Bacterial adhesins | Bacterial adhesins | 106 | 5 |  |
| PurM N-terminal domain-like | PurM C-terminal domain-like | 105 | 5 |  |
| Transducin (alpha subunit), insertion domain | 105 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | "Winged helix" DNA-binding domain | 105 | 13 |  |
| lambda repressor-like DNA-binding domains | Cyanase C-terminal domain | 105 | 1 |  |
| ISP domain | Bet v1-like | 104 | 17 |  |
| PA domain | Transferrin receptor-like dimerisation domain | 104 | 1 |  |
| ISP transmembrane anchor | ISP domain | 104 | 2 |  |
| Zn-dependent exopeptidases | Transferrin receptor-like dimerisation domain | 104 | 1 |  |
| FMN-dependent nitroreductase-like | FMN-dependent nitroreductase-like | 104 | 2 |  |
| Galactose-binding domain-like | Galactose-binding domain-like | 103 | 21 |  |
| Voltage-gated potassium channels | E set domains | 103 | 3 |  |
| ssDNA viruses | 103 | 2 |  |
| Heat shock protein 70kD (HSP70), peptide-binding domain | Heat shock protein 70kD (HSP70), C-terminal subdomain | 103 | 3 |  |
| lambda repressor-like DNA-binding domains | Periplasmic binding protein-like I | 103 | 1 |  |
| Aspartate/glutamate racemase | Aspartate/glutamate racemase | 102 | 5 |  |
| TPR-like | "Winged helix" DNA-binding domain | 102 | 1 |  |
| "Winged helix" DNA-binding domain | Dimeric alpha+beta barrel | 102 | 1 |  |
| N-terminal Zn binding domain of HIV integrase | Ribonuclease H-like | 102 | 3 |  |
| CheY-like | C-terminal effector domain of the bipartite response regulators | 102 | 2 |  |
| Concanavalin A-like lectins/glucanases | Sialidases | 102 | 4 |  |
| Nucleotide-binding domain | FAD/NAD(P)-binding domain | 102 | 4 |  |
| Thioesterase/thiol ester dehydrase-isomerase | Thioesterase/thiol ester dehydrase-isomerase | 101 | 6 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | Galactose oxidase, central domain | 101 | 17 |  |
| Methyl-coenzyme M reductase subunits | Methyl-coenzyme M reductase alpha and beta chain C-terminal domain | 100 | 2 |  |
| ABC transporter transmembrane region | ABC transporter transmembrane region | 99 | 5 |  |
| TATA-box binding protein-like | TATA-box binding protein-like | 99 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | post-AAA+ oligomerization domain-like | 99 | 2 |  |
| Ubiquitin-like | Second domain of FERM | 99 | 7 |  |
| JAB1/MPN domain | JAB1/MPN domain | 98 | 11 |  |
| HAD-like | alpha/beta-Hydrolases | 98 | 1 |  |
| Aspartate carbamoyltransferase, Regulatory-chain, N-terminal domain | Aspartate carbamoyltransferase, Regulatory-chain, C-terminal domain | 98 | 2 |  |
| Single hybrid motif | 98 | 8 |  |
| Lysozyme-like | Family A G protein-coupled receptor-like | 97 | 9 |  |
| SH3-domain | CAD & PB1 domains | 97 | 4 |  |
| Nitrite/Sulfite reductase N-terminal domain-like | Nitrite and sulphite reductase 4Fe-4S domain-like | 97 | 3 |  |
| SRCR-like | Trypsin-like serine proteases | 97 | 8 |  |
| Myosin rod fragments | Myosin rod fragments | 96 | 7 |  |
| GAF domain-like | GAF domain-like | 96 | 10 |  |
| Ribosomal protein S5 domain 2-like | 95 | 7 |  |
| ADP-ribosylation | Diphtheria toxin, middle domain | 95 | 4 |  |
| beta-beta-alpha zinc fingers | beta-beta-alpha zinc fingers | 95 | 14 |  |
| PIN domain-like | 5' to 3' exonuclease, C-terminal subdomain | 95 | 4 |  |
| C-type lectin-like | C-type lectin-like | 94 | 3 |  |
| "Winged helix" DNA-binding domain | "Winged helix" DNA-binding domain | 94 | 12 |  |
| Clavaminate synthase-like | 93 | 7 |  |
| N-terminal domain of MutM-like DNA repair proteins | Glucocorticoid receptor-like (DNA-binding domain) | 93 | 2 |  |
| S13-like H2TH domain | Glucocorticoid receptor-like (DNA-binding domain) | 93 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | RecA protein, C-terminal domain | 92 | 4 |  |
| Aldolase | 92 | 4 |  |
| Phosphoglucomutase, first 3 domains | Phosphoglucomutase, C-terminal domain | 91 | 4 |  |
| Phosphoglucomutase, first 3 domains | Phosphoglucomutase, first 3 domains | 91 | 4 |  |
| post-HMGL domain-like | 90 | 3 |  |
| Bacterial immunoglobulin/albumin-binding domains | Positive stranded ssRNA viruses | 90 | 1 |  |
| p53-like transcription factors | E set domains | 89 | 3 |  |
| POZ domain | Skp1 dimerisation domain-like | 89 | 1 |  |
| SH3-domain | SH2 domain | 89 | 11 |  |
| PAP/OAS1 substrate-binding domain | 89 | 7 |  |
| IP3 receptor type 1 binding core, domain 2 | IP3 receptor type 1 binding core, domain 2 | 89 | 7 |  |
| PreATP-grasp domain | PreATP-grasp domain | 88 | 8 |  |
| Bromodomain | 87 | 5 |  |
| P-loop containing nucleoside triphosphate hydrolases | MOP-like | 87 | 1 |  |
| GST C-terminal domain-like | 87 | 5 |  |
| DBL homology domain (DH-domain) | PH domain-like | 87 | 13 |  |
| A virus capsid protein alpha-helical domain | Viral protein domain | 86 | 1 |  |
| Terpenoid cyclases/Protein prenyltransferases | Terpenoid synthases | 86 | 4 |  |
| Galactose-binding domain-like | Heparin-binding domain from vascular endothelial growth factor | 86 | 3 |  |
| beta-lactamase/transpeptidase-like | beta-lactamase/transpeptidase-like | 85 | 7 |  |
| PreATP-grasp domain | 84 | 6 |  |
| MurD-like peptide ligases, catalytic domain | MurD-like peptide ligases, peptide-binding domain | 84 | 5 |  |
| Glycoside hydrolase/deacetylase | Families 57/38 glycoside transferase middle domain | 83 | 6 |  |
| PAP/OAS1 substrate-binding domain | PAP/Archaeal CCA-adding enzyme, C-terminal domain | 83 | 2 |  |
| Nucleotidyltransferase | PAP/Archaeal CCA-adding enzyme, C-terminal domain | 83 | 2 |  |
| Glucocorticoid receptor-like (DNA-binding domain) | Glucocorticoid receptor-like (DNA-binding domain) | 82 | 7 |  |
| PH domain-like | C-terminal domain of PLC-beta | 82 | 5 |  |
| Ribulose-phoshate binding barrel | 82 | 3 |  |
| Fic-like | 82 | 4 |  |
| Family A G protein-coupled receptor-like | Cytochromes | 82 | 4 |  |
| Voltage-gated potassium channels | Voltage-gated potassium channels | 82 | 14 |  |
| Cryptochrome/photolyase, N-terminal domain | Cryptochrome/photolyase FAD-binding domain | 82 | 3 |  |
| Ricin B-like lectins | 81 | 6 |  |
| Class II aaRS and biotin synthetases | C-terminal domain of ProRS | 81 | 1 |  |
| Midkine | Midkine | 81 | 6 |  |
| Class II aaRS ABD-related | C-terminal domain of ProRS | 81 | 1 |  |
| Alpha-macroglobulin receptor domain | TIMP-like | 80 | 8 |  |
| Major capsid protein VP5 | 80 | 2 |  |
| Terpenoid cyclases/Protein prenyltransferases | 80 | 6 |  |
| CorA soluble domain-like | Magnesium transport protein CorA, transmembrane region | 80 | 1 |  |
| Nucleotide-binding domain | FAD/NAD-linked reductases, dimerisation (C-terminal) domain | 79 | 1 |  |
| L,D-transpeptidase catalytic domain-like | 79 | 3 |  |
| Ubiquitin-like | Ubiquitin-like | 78 | 3 |  |
| Rad51 N-terminal domain-like | P-loop containing nucleoside triphosphate hydrolases | 78 | 2 |  |
| Starch-binding domain-like | (Trans)glycosidases | 78 | 6 |  |
| FMN-binding split barrel | UbiD C-terminal domain-like | 78 | 2 |  |
| Starch-binding domain-like | E set domains | 77 | 5 |  |
| Bacterial fluorinating enzyme, N-terminal domain | Bacterial fluorinating enzyme, C-terminal domain | 77 | 1 |  |
| GLA-domain | EGF/Laminin | 77 | 4 |  |
| P-loop containing nucleoside triphosphate hydrolases | Glucocorticoid receptor-like (DNA-binding domain) | 77 | 1 |  |
| Thiolase-like | FabD/lysophospholipase-like | 77 | 11 |  |
| Rho N-terminal domain-like | Nucleic acid-binding proteins | 77 | 2 |  |
| TATA-box binding protein-like | DNA-glycosylase | 77 | 1 |  |
| CO dehydrogenase ISP C-domain like | FAD-binding/transporter-associated domain-like | 76 | 2 |  |
| SH2 domain | SH2 domain | 76 | 7 |  |
| lambda integrase-like, N-terminal domain | DNA breaking-rejoining enzymes | 76 | 1 |  |
| CO dehydrogenase ISP C-domain like | CO dehydrogenase flavoprotein C-terminal domain-like | 76 | 2 |  |
| Starch-binding domain-like | Glycosyl hydrolase domain | 76 | 4 |  |
| Class I glutamine amidotransferase-like | LD-carboxypeptidase A C-terminal domain-like | 76 | 1 |  |
| NAD(P)-binding Rossmann-fold domains | Succinyl-CoA synthetase domains | 76 | 4 |  |
| 2Fe-2S ferredoxin-like | FAD-binding/transporter-associated domain-like | 76 | 2 |  |
| Ribosomal protein S19 | 76 | 2 |  |
| 2Fe-2S ferredoxin-like | CO dehydrogenase flavoprotein C-terminal domain-like | 76 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | DNA/RNA polymerases | 75 | 1 |  |
| Lipase/lipooxygenase domain (PLAT/LH2 domain) | Lipoxigenase | 75 | 4 |  |
| Polo-box domain | Polo-box domain | 75 | 2 |  |
| Families 57/38 glycoside transferase middle domain | Galactose mutarotase-like | 75 | 5 |  |
| Leucine zipper domain | Leucine zipper domain | 75 | 9 |  |
| Periplasmic binding protein-like II | Voltage-gated potassium channels | 74 | 7 |  |
| (Trans)glycosidases | Hyaluronidase post-catalytic domain-like | 74 | 3 |  |
| S-adenosylmethionine synthetase | S-adenosylmethionine synthetase | 74 | 2 |  |
| post-HMGL domain-like | Single hybrid motif | 74 | 4 |  |
| Aldolase | Single hybrid motif | 74 | 4 |  |
| PUA domain-like | eIF1-like | 74 | 4 |  |
| beta-N-acetylhexosaminidase-like domain | Hyaluronidase post-catalytic domain-like | 74 | 3 |  |
| Glycoside hydrolase/deacetylase | Galactose mutarotase-like | 74 | 4 |  |
| NAD(P)-binding Rossmann-fold domains | UDP-glucose/GDP-mannose dehydrogenase C-terminal domain | 73 | 2 |  |
| Thioredoxin-like | NHL repeat | 73 | 2 |  |
| Cobalamin (vitamin B12)-dependent enzymes | Cobalamin (vitamin B12)-binding domain | 73 | 3 |  |
| Terpenoid cyclases/Protein prenyltransferases | 73 | 11 |  |
| Class II aaRS and biotin synthetases | C-terminal domain of transcriptional repressors | 73 | 2 |  |
| Acyl-CoA N-acyltransferases (Nat) | SCP-like | 73 | 2 |  |
| "Winged helix" DNA-binding domain | 72 | 8 |  |
| TRAF domain-like | POZ domain | 71 | 9 |  |
| DNA repair protein MutS, domain III | P-loop containing nucleoside triphosphate hydrolases | 71 | 5 |  |
| SH2 domain | Protein kinase-like (PK-like) | 71 | 6 |  |
| PRTase-like | PRTase-like | 71 | 1 |  |
| "Winged helix" DNA-binding domain | C-terminal domain of transcriptional repressors | 70 | 2 |  |
| Rho N-terminal domain-like | P-loop containing nucleoside triphosphate hydrolases | 70 | 1 |  |
| Di-copper centre-containing domain | 70 | 3 |  |
| Periplasmic binding protein-like I | Voltage-gated potassium channels | 70 | 6 |  |
| Bacteriophage trimeric proteins domain | Phage fibre proteins | 69 | 1 |  |
| Homeodomain-like | FAD-linked reductases, C-terminal domain | 69 | 2 |  |
| Homodimeric domain of signal transducing histidine kinase | ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | 69 | 7 |  |
| Molybdenum cofactor biosynthesis proteins | MoeA C-terminal domain-like | 69 | 1 |  |
| Bacteriophage trimeric proteins domain | Virus attachment protein globular domain | 69 | 1 |  |
| MoeA N-terminal region -like | MoeA C-terminal domain-like | 69 | 1 |  |
| Homeodomain-like | FAD/NAD(P)-binding domain | 69 | 2 |  |
| MoeA N-terminal region -like | Molybdenum cofactor biosynthesis proteins | 69 | 1 |  |
| Alkaline phosphatase-like | His-Me finger endonucleases | 69 | 4 |  |
| Cytochrome b5-like heme/steroid binding domain | Oxidoreductase molybdopterin-binding domain | 68 | 11 |  |
| Galactose mutarotase-like | Six-hairpin glycosidases | 68 | 4 |  |
| Glycosyl hydrolase domain | Glycosyl hydrolase domain | 68 | 1 |  |
| beta-sandwich domain of Sec23/24 | vWA-like | 67 | 4 |  |
| vWA-like | C-terminal, gelsolin-like domain of Sec23/24 | 67 | 4 |  |
| 4Fe-4S ferredoxins | 67 | 4 |  |
| PH domain-like | Ras GEF | 67 | 11 |  |
| beta-sandwich domain of Sec23/24 | C-terminal, gelsolin-like domain of Sec23/24 | 67 | 4 |  |
| Epsilon subunit of F1F0-ATP synthase N-terminal domain | Epsilon subunit of F1F0-ATP synthase C-terminal domain | 67 | 2 |  |
| Thiamin diphosphate-binding fold (THDP-binding) | TK C-terminal domain-like | 67 | 3 |  |
| vWA-like | Helical domain of Sec23/24 | 67 | 4 |  |
| Helical domain of Sec23/24 | C-terminal, gelsolin-like domain of Sec23/24 | 67 | 4 |  |
| beta-sandwich domain of Sec23/24 | Helical domain of Sec23/24 | 67 | 4 |  |
| Phospholipase D/nuclease | Phospholipase D/nuclease | 66 | 3 |  |
| Alpha-macroglobulin receptor domain | 66 | 9 |  |
| Coronavirus S2 glycoprotein | Fibritin | 66 | 1 |  |
| RNI-like | RNI-like | 66 | 12 |  |
| Nucleic acid-binding proteins | Eukaryotic type KH-domain (KH-domain type I) | 66 | 4 |  |
| UDP-Glycosyltransferase/glycogen phosphorylase | UDP-Glycosyltransferase/glycogen phosphorylase | 66 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | Ribosomal protein S5 domain 2-like | 66 | 8 |  |
| Ribosomal protein S5 domain 2-like | HSP90 C-terminal domain | 66 | 6 |  |
| SARS receptor-binding domain-like | Fibritin | 66 | 1 |  |
| EF-hand | SH2 domain | 65 | 3 |  |
| Protein kinase-like (PK-like) | EF-hand | 65 | 3 |  |
| UDP-Glycosyltransferase/glycogen phosphorylase | 65 | 1 |  |
| Terpenoid cyclases/Protein prenyltransferases | Terpenoid cyclases/Protein prenyltransferases | 65 | 3 |  |
| N-terminal domain of cbl (N-cbl) | EF-hand | 65 | 3 |  |
| N-terminal domain of cbl (N-cbl) | SH2 domain | 65 | 3 |  |
| Protein prenylyltransferase | UDP-Glycosyltransferase/glycogen phosphorylase | 65 | 1 |  |
| CO dehydrogenase ISP C-domain like | CO dehydrogenase molybdoprotein N-domain-like | 64 | 2 |  |
| 2Fe-2S ferredoxin-like | Molybdenum cofactor-binding domain | 64 | 2 |  |
| GFP-like | GFP-like | 64 | 9 |  |
| Regulator of G-protein signaling, RGS | Protein kinase-like (PK-like) | 64 | 5 |  |
| 2Fe-2S ferredoxin-like | CO dehydrogenase molybdoprotein N-domain-like | 64 | 2 |  |
| Nucleotidyltransferase | Poly A polymerase C-terminal region-like | 64 | 3 |  |
| CO dehydrogenase ISP C-domain like | Molybdenum cofactor-binding domain | 64 | 2 |  |
| Protein kinase-like (PK-like) | SH3-domain | 64 | 4 |  |
| DeoB insert domain-like | Alkaline phosphatase-like | 64 | 1 |  |
| Immunoglobulin-binding domains | NHL repeat | 64 | 5 |  |
| DEATH domain | P-loop containing nucleoside triphosphate hydrolases | 63 | 5 |  |
| Mechanosensitive channel protein MscS (YggB), transmembrane region | Mechanosensitive channel protein MscS (YggB), C-terminal domain | 63 | 2 |  |
| Integrin domains | EGF/Laminin | 63 | 2 |  |
| Sm-like ribonucleoproteins | Mechanosensitive channel protein MscS (YggB), C-terminal domain | 63 | 2 |  |
| Rad51 N-terminal domain-like | Ribosomal protein L32e | 63 | 1 |  |
| EF-hand | EF-hand | 63 | 11 |  |
| tRNA-binding arm | Class II aaRS and biotin synthetases | 63 | 5 |  |
| Ribonuclease H-like | DNA-binding domain of retroviral integrase | 63 | 3 |  |
| Mechanosensitive channel protein MscS (YggB), transmembrane region | Sm-like ribonucleoproteins | 63 | 2 |  |
| Di-copper centre-containing domain | E set domains | 62 | 5 |  |
| Glutathione synthetase ATP-binding domain-like | post-HMGL domain-like | 62 | 2 |  |
| PreATP-grasp domain | Aldolase | 62 | 2 |  |
| Terpenoid cyclases/Protein prenyltransferases | Alpha-macroglobulin receptor domain | 62 | 8 |  |
| Rudiment single hybrid motif | Aldolase | 62 | 2 |  |
| PreATP-grasp domain | post-HMGL domain-like | 62 | 2 |  |
| Flavoproteins | Ferredoxin reductase-like, C-terminal NADP-linked domain | 62 | 3 |  |
| Hairpin loop containing domain-like | Kringle-like | 62 | 3 |  |
| Flavoproteins | Riboflavin synthase domain-like | 62 | 3 |  |
| Rudiment single hybrid motif | post-HMGL domain-like | 62 | 2 |  |
| Glutathione synthetase ATP-binding domain-like | Aldolase | 62 | 2 |  |
| Zn-finger domain of Sec23/24 | beta-sandwich domain of Sec23/24 | 61 | 3 |  |
| Type II DNA topoisomerase | 61 | 6 |  |
| Zn-finger domain of Sec23/24 | Helical domain of Sec23/24 | 61 | 3 |  |
| Zn-finger domain of Sec23/24 | vWA-like | 61 | 3 |  |
| alpha-ketoacid dehydrogenase kinase, N-terminal domain | ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | 61 | 2 |  |
| Zn-finger domain of Sec23/24 | C-terminal, gelsolin-like domain of Sec23/24 | 61 | 3 |  |
| EF-G C-terminal domain-like | 61 | 3 |  |
| LeuD/IlvD-like | 61 | 3 |  |
| Homeodomain-like | Homeodomain-like | 60 | 11 |  |
| WW domain | Periplasmic binding protein-like II | 60 | 2 |  |
| Hemocyanin, N-terminal domain | E set domains | 60 | 4 |  |
| NagB/RpiA/CoA transferase-like | D-ribose-5-phosphate isomerase (RpiA), lid domain | 60 | 2 |  |
| IP3 receptor type 1 binding core, domain 2 | IP3 receptor type 1 binding core, domain 2 | 60 | 3 |  |
| DNA repair protein MutS, domain I | P-loop containing nucleoside triphosphate hydrolases | 60 | 3 |  |
| DNA ligase/mRNA capping enzyme, catalytic domain | Nucleic acid-binding proteins | 60 | 5 |  |
| Photosystem I subunits PsaA/PsaB | Photosystem I subunits PsaA/PsaB | 60 | 5 |  |
| DNA repair protein MutS, domain I | DNA repair protein MutS, domain III | 60 | 3 |  |
| Hemocyanin, N-terminal domain | Di-copper centre-containing domain | 60 | 4 |  |
| Sema domain | Plexin repeat | 59 | 7 |  |
| Somatomedin B domain | Somatomedin B domain | 59 | 3 |  |
| Somatomedin B domain | His-Me finger endonucleases | 59 | 3 |  |
| alpha/beta-Hydrolases | Galactose-binding domain-like | 59 | 3 |  |
| (Trans)glycosidases | (Trans)glycosidases | 59 | 8 |  |
| Acetyl-CoA synthetase-like | alpha/beta-Hydrolases | 59 | 4 |  |
| Somatomedin B domain | Alkaline phosphatase-like | 59 | 3 |  |
| Integrin alpha N-terminal domain | Integrin domains | 59 | 7 |  |
| Formyltransferase | FMT C-terminal domain-like | 58 | 3 |  |
| Translation proteins | 58 | 12 |  |
| RNase III domain-like | dsRNA-binding domain-like | 58 | 5 |  |
| Single hybrid motif | 58 | 2 |  |
| CBS-domain pair | CBS-domain pair | 57 | 3 |  |
| TIMP-like | 57 | 6 |  |
| alpha/beta-Hydrolases | Influenza virus matrix protein M1 | 57 | 1 |  |
| Carbohydrate binding domain | (Trans)glycosidases | 57 | 3 |  |
| DNA repair protein MutS, domain II | P-loop containing nucleoside triphosphate hydrolases | 57 | 3 |  |
| DNA repair protein MutS, domain II | DNA repair protein MutS, domain III | 57 | 3 |  |
| RmlC-like cupins | RmlC-like cupins | 57 | 1 |  |
| Sialidases | Oligoxyloglucan reducing end-specific cellobiohydrolase | 56 | 2 |  |
| Acetyl-CoA synthetase-like | ACP-like | 56 | 5 |  |
| Probable ACP-binding domain of malonyl-CoA ACP transacylase | 56 | 13 |  |
| Carbohydrate binding domain | (Trans)glycosidases | 56 | 5 |  |
| Growth factor receptor domain | Growth factor receptor domain | 56 | 2 |  |
| Folate-binding domain | Aminomethyltransferase beta-barrel domain | 55 | 3 |  |
| 6-phosphogluconate dehydrogenase C-terminal domain-like | 6-phosphogluconate dehydrogenase C-terminal domain-like | 55 | 3 |  |
| (Trans)glycosidases | Ricin B-like lectins | 55 | 4 |  |
| E set domains | Transglutaminase, two C-terminal domains | 55 | 2 |  |
| E set domains | Cysteine proteinases | 55 | 2 |  |
| Multiheme cytochromes | Multiheme cytochromes | 55 | 2 |  |
| DNA repair protein MutS, domain I | DNA repair protein MutS, domain II | 55 | 2 |  |
| Zn-dependent exopeptidases | 55 | 3 |  |
| Cysteine proteinases | Transglutaminase, two C-terminal domains | 55 | 2 |  |
| Carbamate kinase-like | ACT-like | 55 | 2 |  |
| lambda repressor-like DNA-binding domains | RmlC-like cupins | 55 | 2 |  |
| beta-lactamase/transpeptidase-like | Penicillin-binding protein associated domain | 55 | 2 |  |
| Transglutaminase, two C-terminal domains | Transglutaminase, two C-terminal domains | 55 | 2 |  |
| Subtilisin-like | Galactose-binding domain-like | 54 | 3 |  |
| cAMP-binding domain-like | 54 | 5 |  |
| (Trans)glycosidases | Class I glutamine amidotransferase-like | 54 | 4 |  |
| tRNA-intron endonuclease catalytic domain-like | tRNA-intron endonuclease catalytic domain-like | 54 | 5 |  |
| Galactose mutarotase-like | Anthrax protective antigen | 54 | 6 |  |
| CBS-domain pair | Inosine monophosphate dehydrogenase (IMPDH) | 54 | 1 |  |
| FucI/AraA N-terminal and middle domains | FucI/AraA C-terminal domain-like | 54 | 1 |  |
| N-terminal domain of DnaB helicase | P-loop containing nucleoside triphosphate hydrolases | 54 | 1 |  |
| Terpenoid cyclases/Protein prenyltransferases | TIMP-like | 53 | 5 |  |
| Glutathione synthetase ATP-binding domain-like | Succinyl-CoA synthetase domains | 53 | 3 |  |
| PH domain-like | 53 | 10 |  |
| Voltage-gated potassium channels | cAMP-binding domain-like | 52 | 6 |  |
| Ribosomal protein L7/12, oligomerisation (N-terminal) domain | ClpS-like | 52 | 2 |  |
| HAD-like | HAD-like | 52 | 3 |  |
| CO dehydrogenase flavoprotein C-terminal domain-like | CO dehydrogenase molybdoprotein N-domain-like | 52 | 1 |  |
| CO dehydrogenase flavoprotein C-terminal domain-like | Molybdenum cofactor-binding domain | 52 | 1 |  |
| Cysteine proteinases | 52 | 9 |  |
| N-terminal Zn binding domain of HIV integrase | DNA-binding domain of retroviral integrase | 52 | 2 |  |
| Ribbon-helix-helix | ACT-like | 52 | 1 |  |
| FAD-binding/transporter-associated domain-like | Molybdenum cofactor-binding domain | 52 | 1 |  |
| FAD-binding/transporter-associated domain-like | CO dehydrogenase molybdoprotein N-domain-like | 52 | 1 |  |
| NAD(P)-binding Rossmann-fold domains | Thiolase-like | 52 | 5 |  |
| TSP-1 type 1 repeat | LDL receptor-like module | 51 | 5 |  |
| PYP-like sensor domain (PAS domain) | PYP-like sensor domain (PAS domain) | 51 | 6 |  |
| Nucleotide-diphospho-sugar transferases | Ricin B-like lectins | 51 | 3 |  |
| Heterotrimerisation domain of extracellular hemoglobin linker subunits | Extracellular hemoglobin linker subunit, receptor domain | 51 | 3 |  |
| Ribosomal protein S5 domain 2-like | Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 | 51 | 4 |  |
| Ribonuclease PH domain 2-like | Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 | 51 | 4 |  |
| Heterotrimerisation domain of extracellular hemoglobin linker subunits | LDL receptor-like module | 51 | 3 |  |
| LDL receptor-like module | Extracellular hemoglobin linker subunit, receptor domain | 51 | 3 |  |
| Ribonuclease PH domain 2-like | Ribonuclease PH domain 2-like | 51 | 4 |  |
| Galactose-binding domain-like | Growth factor receptor domain | 50 | 3 |  |
| 2Fe-2S ferredoxin-like | 4Fe-4S ferredoxins | 50 | 4 |  |
| Protein kinase-like (PK-like) | 50 | 13 |  |
| SET domain | 50 | 5 |  |
| RNI-like | L domain-like | 50 | 12 |  |
| PH0987 N-terminal domain-like | 50 | 1 |  |
| FAD/NAD-linked reductases, dimerisation (C-terminal) domain | 50 | 4 |  |
| MurCD N-terminal domain | MurD-like peptide ligases, catalytic domain | 50 | 2 |  |
| Nucleoside phosphorylase/phosphoribosyltransferase N-terminal domain | Pyrimidine nucleoside phosphorylase C-terminal domain | 50 | 2 |  |
| Ribulose-phoshate binding barrel | Ribulose-phoshate binding barrel | 50 | 3 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | DNA methylase specificity domain | 50 | 4 |  |
| Nucleoside phosphorylase/phosphoribosyltransferase catalytic domain | Pyrimidine nucleoside phosphorylase C-terminal domain | 50 | 2 |  |
| Cyclophilin-like | TPR-like | 50 | 1 |  |
| SH2 domain | ARM repeat | 50 | 1 |  |
| Creatinase/aminopeptidase | "Winged helix" DNA-binding domain | 50 | 3 |  |
| Class I glutamine amidotransferase-like | 50 | 2 |  |
| Iron-dependent repressor protein, dimerization domain | C-terminal domain of transcriptional repressors | 49 | 1 |  |
| lambda repressor-like DNA-binding domains | TPR-like | 49 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Sec63 N-terminal domain-like | 49 | 8 |  |
| Phosphofructokinase | Phosphofructokinase | 49 | 3 |  |
| Pyruvate-ferredoxin oxidoreductase, PFOR, domain III | 4Fe-4S ferredoxins | 49 | 2 |  |
| SNARE-like | P-loop containing nucleoside triphosphate hydrolases | 49 | 3 |  |
| FabD/lysophospholipase-like | NAD(P)-binding Rossmann-fold domains | 49 | 4 |  |
| Nitrite and sulphite reductase 4Fe-4S domain-like | Nitrite and sulphite reductase 4Fe-4S domain-like | 49 | 2 |  |
| Rhodanese/Cell cycle control phosphatase | Rhodanese/Cell cycle control phosphatase | 49 | 5 |  |
| Nitrite/Sulfite reductase N-terminal domain-like | Nitrite/Sulfite reductase N-terminal domain-like | 49 | 2 |  |
| C-type lectin-like | Aerolisin/ETX pore-forming domain | 49 | 1 |  |
| Carbohydrate binding domain | Chitinase insertion domain | 49 | 3 |  |
| 4Fe-4S ferredoxins | Nitrite and sulphite reductase 4Fe-4S domain-like | 48 | 1 |  |
| Translational machinery components | L30e-like | 48 | 3 |  |
| Formate/glycerate dehydrogenase catalytic domain-like | Formate/glycerate dehydrogenase catalytic domain-like | 48 | 2 |  |
| Nucleotidylyl transferase | An anticodon-binding domain of class I aminoacyl-tRNA synthetases | 48 | 2 |  |
| RCC1/BLIP-II | 48 | 5 |  |
| Actin-like ATPase domain | Heat shock protein 70kD (HSP70), peptide-binding domain | 48 | 3 |  |
| Metalloproteases ("zincins"), catalytic domain | Clostridium neurotoxins, "coiled-coil" domain | 48 | 5 |  |
| Nitrite/Sulfite reductase N-terminal domain-like | 4Fe-4S ferredoxins | 48 | 1 |  |
| FabD/lysophospholipase-like | FabD/lysophospholipase-like | 48 | 4 |  |
| Metallo-hydrolase/oxidoreductase | Flavoproteins | 47 | 2 |  |
| ValRS/IleRS/LeuRS editing domain | Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases | 47 | 4 |  |
| Nucleotidylyl transferase | ValRS/IleRS/LeuRS editing domain | 47 | 4 |  |
| Glycosyl hydrolase domain | Galactose-binding domain-like | 47 | 6 |  |
| Protease propeptides/inhibitors | Subtilisin-like | 47 | 5 |  |
| SH2 domain | (Phosphotyrosine protein) phosphatases II | 47 | 2 |  |
| Galactose mutarotase-like | Hyaluronate lyase-like, C-terminal domain | 47 | 4 |  |
| Chondroitin AC/alginate lyase | Hyaluronate lyase-like, C-terminal domain | 47 | 4 |  |
| Terpenoid cyclases/Protein prenyltransferases | 47 | 1 |  |
| E set domains | Chitinase insertion domain | 47 | 2 |  |
| CRAL/TRIO N-terminal domain | CRAL/TRIO domain | 47 | 6 |  |
| LDL receptor-like module | Growth factor receptor domain | 47 | 3 |  |
| TSP-1 type 1 repeat | Growth factor receptor domain | 47 | 3 |  |
| Virus ectodomain | Leucine zipper domain | 47 | 7 |  |
| Chondroitin AC/alginate lyase | Galactose mutarotase-like | 47 | 4 |  |
| Glutathione synthetase ATP-binding domain-like | Carbamoyl phosphate synthetase, large subunit connection domain | 46 | 2 |  |
| Carbamoyl phosphate synthetase, small subunit N-terminal domain | Class I glutamine amidotransferase-like | 46 | 2 |  |
| Glutathione synthetase ATP-binding domain-like | Glutathione synthetase ATP-binding domain-like | 46 | 2 |  |
| GroES-like | 46 | 3 |  |
| PreATP-grasp domain | Carbamoyl phosphate synthetase, large subunit connection domain | 46 | 2 |  |
| Alpha-macroglobulin receptor domain | 46 | 8 |  |
| Glutathione synthetase ATP-binding domain-like | Methylglyoxal synthase-like | 46 | 2 |  |
| PUA domain-like | Nucleotidylyl transferase | 46 | 3 |  |
| PreATP-grasp domain | Methylglyoxal synthase-like | 46 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | WD40 repeat-like | 46 | 2 |  |
| Spectrin repeat | Spectrin repeat | 46 | 8 |  |
| Galactose mutarotase-like | CBD9-like | 46 | 2 |  |
| Carbamoyl phosphate synthetase, large subunit connection domain | Methylglyoxal synthase-like | 46 | 2 |  |
| PreATP-grasp domain | PreATP-grasp domain | 46 | 2 |  |
| Periplasmic binding protein-like II | GlnB-like | 45 | 1 |  |
| Pyruvate-ferredoxin oxidoreductase, PFOR, domain III | TK C-terminal domain-like | 45 | 2 |  |
| Pyruvate-ferredoxin oxidoreductase, PFOR, domain III | Thiamin diphosphate-binding fold (THDP-binding) | 45 | 2 |  |
| Rad51 N-terminal domain-like | Rad51 N-terminal domain-like | 45 | 5 |  |
| Ribosomal L27 protein-like | Nucleic acid-binding proteins | 45 | 3 |  |
| Fibre shaft of virus attachment proteins | Virus attachment protein globular domain | 45 | 3 |  |
| FabD/lysophospholipase-like | Thioesterase/thiol ester dehydrase-isomerase | 45 | 3 |  |
| Adenine nucleotide alpha hydrolases-like | Argininosuccinate synthetase, C-terminal domain | 45 | 1 |  |
| Fibronectin type III | Immunoglobulin | 45 | 11 |  |
| Di-copper centre-containing domain | C-terminal domain of mollusc hemocyanin | 45 | 7 |  |
| PDZ domain-like | ClpP/crotonase | 45 | 4 |  |
| RING/U-box | RING/U-box | 45 | 9 |  |
| Phosphohistidine domain | Phosphoenolpyruvate/pyruvate domain | 45 | 4 |  |
| P-loop containing nucleoside triphosphate hydrolases | FtsH protease domain-like | 45 | 1 |  |
| Thioesterase/thiol ester dehydrase-isomerase | 45 | 3 |  |
| Glyoxalase/Bleomycin resistance protein/Dihydroxybiphenyl dioxygenase | Glyoxalase/Bleomycin resistance protein/Dihydroxybiphenyl dioxygenase | 45 | 2 |  |
| cAMP-binding domain-like | cAMP-binding domain-like | 44 | 5 |  |
| Metallo-dependent phosphatases | 5'-nucleotidase (syn. UDP-sugar hydrolase), C-terminal domain | 44 | 2 |  |
| Rho N-terminal domain-like | P-loop containing nucleoside triphosphate hydrolases | 44 | 13 |  |
| Cytochrome c | C-terminal (heme d1) domain of cytochrome cd1-nitrite reductase | 44 | 1 |  |
| Plant lectins/antimicrobial peptides | Plant lectins/antimicrobial peptides | 44 | 3 |  |
| RuvA domain 2-like | BRCT domain | 44 | 4 |  |
| Methylglyoxal synthase-like | Cytidine deaminase-like | 44 | 1 |  |
| Zinc beta-ribbon | 44 | 7 |  |
| ClpP/crotonase | NAD(P)-binding Rossmann-fold domains | 43 | 2 |  |
| "Winged helix" DNA-binding domain | C-terminal domain of transcriptional repressors | 43 | 5 |  |
| ClpP/crotonase | 6-phosphogluconate dehydrogenase C-terminal domain-like | 43 | 2 |  |
| HydA/Nqo6-like | 43 | 2 |  |
| "Winged helix" DNA-binding domain | Sec63 N-terminal domain-like | 43 | 7 |  |
| Integrin domains | Integrin domains | 43 | 7 |  |
| WW domain | FKBP-like | 43 | 2 |  |
| Arabinanase/levansucrase/invertase | Ricin B-like lectins | 43 | 3 |  |
| Purple acid phosphatase, N-terminal domain | Metallo-dependent phosphatases | 43 | 2 |  |
| ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | HSP90 C-terminal domain | 43 | 4 |  |
| Class II aaRS and biotin synthetases | Putative anticodon-binding domain of alanyl-tRNA synthetase (AlaRS) | 43 | 4 |  |
| Oxidoreductase molybdopterin-binding domain | E set domains | 43 | 3 |  |
| Acyl-CoA dehydrogenase C-terminal domain-like | Acyl-CoA dehydrogenase C-terminal domain-like | 42 | 5 |  |
| "Winged helix" DNA-binding domain | GAF domain-like | 42 | 2 |  |
| Histone H3 K4-specific methyltransferase SET7/9 N-terminal domain | SET domain | 42 | 1 |  |
| DsbC/DsbG N-terminal domain-like | Thioredoxin-like | 42 | 1 |  |
| Nucleic acid-binding proteins | RuvA domain 2-like | 42 | 7 |  |
| SNARE-like | Second domain of Mu2 adaptin subunit (ap50) of ap2 adaptor | 42 | 2 |  |
| Prion-like | 42 | 2 |  |
| Metalloproteases ("zincins"), catalytic domain | Adenylylcyclase toxin (the edema factor) | 42 | 1 |  |
| Clathrin adaptor appendage domain | Subdomain of clathrin and coatomer appendage domain | 42 | 4 |  |
| Kringle-like | Kringle-like | 42 | 12 |  |
| Aspartate/glutamate racemase | 42 | 3 |  |
| TK C-terminal domain-like | 4Fe-4S ferredoxins | 41 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Microbial and mitochondrial ADK, insert "zinc finger" domain | 41 | 1 |  |
| Glutamine synthetase/guanido kinase | GatB/YqeY motif | 41 | 3 |  |
| PLP-dependent transferases | Ornithine decarboxylase C-terminal domain | 41 | 3 |  |
| L domain-like | E set domains | 41 | 6 |  |
| Thiamin diphosphate-binding fold (THDP-binding) | 4Fe-4S ferredoxins | 41 | 1 |  |
| PAZ domain | Ribonuclease H-like | 41 | 4 |  |
| Metalloproteases ("zincins"), catalytic domain | Blood coagulation inhibitor (disintegrin) | 41 | 2 |  |
| Glycosyl hydrolase domain | Glycosyl hydrolase domain | 41 | 3 |  |
| Actin depolymerizing proteins | Actin depolymerizing proteins | 40 | 4 |  |
| PAZ domain | dsRNA-binding domain-like | 40 | 15 |  |
| Integrin domains | EGF/Laminin | 40 | 8 |  |
| P-loop containing nucleoside triphosphate hydrolases | Interferon-induced guanylate-binding protein 1 (GBP1), C-terminal domain | 40 | 2 |  |
| MurCD N-terminal domain | MurD-like peptide ligases, peptide-binding domain | 40 | 1 |  |
| PUA domain-like | alpha/beta knot | 40 | 1 |  |
| Ferritin-like | Rubredoxin-like | 40 | 1 |  |
| Protein kinase-like (PK-like) | KA1-like | 39 | 3 |  |
| Periplasmic binding protein-like II | DEATH domain | 39 | 2 |  |
| EspE N-terminal domain-like | P-loop containing nucleoside triphosphate hydrolases | 39 | 2 |  |
| Lysozyme-like | Family A G protein-coupled receptor-like | 39 | 6 |  |
| RNA-binding domain, RBD | 39 | 5 |  |
| Peptidylarginine deiminase Pad4, middle domain | Pentein | 39 | 1 |  |
| Cupredoxins | Peptidylarginine deiminase Pad4, middle domain | 39 | 1 |  |
| Sialidases | E set domains | 39 | 2 |  |
| tRNA-intron endonuclease N-terminal domain-like | tRNA-intron endonuclease catalytic domain-like | 39 | 4 |  |
| TPR-like | 39 | 4 |  |
| Sec63 N-terminal domain-like | E set domains | 39 | 7 |  |
| Cupredoxins | Pentein | 39 | 1 |  |
| Plexin repeat | EGF/Laminin | 38 | 6 |  |
| SGNH hydrolase | Viral protein domain | 38 | 1 |  |
| Phage fibre proteins | Receptor-binding domain of short tail fibre protein gp12 | 38 | 2 |  |
| Nitrous oxide reductase, N-terminal domain | Cupredoxins | 38 | 2 |  |
| ADC-like | P-loop containing nucleoside triphosphate hydrolases | 38 | 2 |  |
| Purine and uridine phosphorylases | 38 | 1 |  |
| FMN-linked oxidoreductases | Ribulose-phoshate binding barrel | 38 | 5 |  |
| PheT/TilS domain | Putative DNA-binding domain | 38 | 4 |  |
| P-loop containing nucleoside triphosphate hydrolases | PH domain-like | 38 | 2 |  |
| Cyclophilin-like | Cyclophilin-like | 38 | 6 |  |
| Terpenoid cyclases/Protein prenyltransferases | 38 | 9 |  |
| P-loop containing nucleoside triphosphate hydrolases | Class I glutamine amidotransferase-like | 38 | 1 |  |
| Metalloproteases ("zincins"), catalytic domain | Concanavalin A-like lectins/glucanases | 38 | 3 |  |
| HIN-2000 domain-like | HIN-2000 domain-like | 38 | 1 |  |
| (Trans)glycosidases | Anthrax protective antigen | 38 | 2 |  |
| (Phosphotyrosine protein) phosphatases II | C2 domain (Calcium/lipid-binding domain, CaLB) | 37 | 1 |  |
| Urease metallochaperone UreE, N-terminal domain | Urease metallochaperone UreE, C-terminal domain | 37 | 1 |  |
| Putative DNA-binding domain | Putative DNA-binding domain | 37 | 3 |  |
| Glycosyl hydrolase domain | 37 | 3 |  |
| GAF domain-like | GAF domain-like | 37 | 8 |  |
| TIMP-like | 37 | 5 |  |
| SAM/Pointed domain | 37 | 9 |  |
| SIS domain | SIS domain | 37 | 1 |  |
| Trypsin-like serine proteases | P-loop containing nucleoside triphosphate hydrolases | 37 | 2 |  |
| Porins | 37 | 4 |  |
| NAD(P)-binding Rossmann-fold domains | ACT-like | 37 | 4 |  |
| vWA-like | EGF/Laminin | 37 | 5 |  |
| vWA-like | Integrin beta tail domain | 36 | 4 |  |
| Plexin repeat | Integrin beta tail domain | 36 | 4 |  |
| Initiation factor IF2/eIF5b, domain 3 | Translation proteins | 36 | 5 |  |
| Copper amine oxidase, domain N | Amine oxidase catalytic domain | 36 | 1 |  |
| XRCC4, N-terminal domain | XRCC4, C-terminal oligomerization domain | 36 | 2 |  |
| Cytochrome f, large domain | Rudiment single hybrid motif | 36 | 3 |  |
| Sec63 N-terminal domain-like | 36 | 5 |  |
| Nqo1 middle domain-like | Nqo1C-terminal domain-like | 36 | 2 |  |
| ACP-like | alpha/beta-Hydrolases | 36 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | Pre-protein crosslinking domain of SecA | 36 | 6 |  |
| Nqo1 FMN-binding domain-like | Nqo1C-terminal domain-like | 36 | 2 |  |
| 4Fe-4S ferredoxins | Cna protein B-type domain | 36 | 1 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | S-adenosyl-L-methionine-dependent methyltransferases | 36 | 2 |  |
| mRNA decapping enzyme DcpS N-terminal domain | HIT-like | 36 | 2 |  |
| Nucleic acid-binding proteins | TPR-like | 36 | 3 |  |
| "Winged helix" DNA-binding domain | NAD(P)-binding Rossmann-fold domains | 36 | 1 |  |
| Integrin domains | Integrin beta tail domain | 36 | 4 |  |
| PHM/PNGase F | PHM/PNGase F | 36 | 3 |  |
| Oligoxyloglucan reducing end-specific cellobiohydrolase | Oligoxyloglucan reducing end-specific cellobiohydrolase | 36 | 8 |  |
| Nucleotidylyl transferase | 36 | 7 |  |
| EGF/Laminin | Integrin beta tail domain | 36 | 4 |  |
| Nqo1 FMN-binding domain-like | Nqo1 middle domain-like | 36 | 2 |  |
| Immunoglobulin | E set domains | 36 | 8 |  |
| GINS helical bundle-like | PriA/YqbF domain | 36 | 3 |  |
| RING/U-box | Quinoprotein alcohol dehydrogenase-like | 36 | 1 |  |
| E set domains | "Winged helix" DNA-binding domain | 36 | 6 |  |
| Copper amine oxidase, domain N | Amine oxidase N-terminal region | 36 | 1 |  |
| Methylglyoxal synthase-like | Cytidine deaminase-like | 36 | 6 |  |
| Arabinanase/levansucrase/invertase | 36 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | Initiation factor IF2/eIF5b, domain 3 | 36 | 5 |  |
| Sialidases | Sialidases | 35 | 2 |  |
| Head and neck region of the ectodomain of NDV fusion glycoprotein | 35 | 5 |  |
| Putative DNA-binding domain | Class II aaRS and biotin synthetases | 35 | 3 |  |
| Class II aaRS and biotin synthetases | Anticodon-binding domain of PheRS | 35 | 3 |  |
| TRAF domain-like | POZ domain | 35 | 4 |  |
| "Winged helix" DNA-binding domain | Protein kinase-like (PK-like) | 35 | 4 |  |
| PheT/TilS domain | Class II aaRS and biotin synthetases | 35 | 3 |  |
| Cytochrome f, large domain | Cytochrome f subunit of the cytochrome b6f complex, transmembrane anchor | 35 | 3 |  |
| Virus ectodomain | Head and neck region of the ectodomain of NDV fusion glycoprotein | 35 | 5 |  |
| Transcription factor IIA (TFIIA), alpha-helical domain | Transcription factor IIA (TFIIA), beta-barrel domain | 35 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | E set domains | 35 | 5 |  |
| Chromo domain-like | P-loop containing nucleoside triphosphate hydrolases | 35 | 4 |  |
| "Winged helix" DNA-binding domain | GntR ligand-binding domain-like | 35 | 1 |  |
| Ran binding protein zinc finger-like | "Winged helix" DNA-binding domain | 35 | 7 |  |
| Clostridium neurotoxins, "coiled-coil" domain | Concanavalin A-like lectins/glucanases | 35 | 2 |  |
| (Phosphotyrosine protein) phosphatases II | (Phosphotyrosine protein) phosphatases II | 35 | 3 |  |
| Sec63 N-terminal domain-like | Sec63 N-terminal domain-like | 35 | 5 |  |
| Pre-protein crosslinking domain of SecA | Helical scaffold and wing domains of SecA | 35 | 5 |  |
| FAD-linked oxidoreductase | ALDH-like | 35 | 4 |  |
| PH domain-like | Protein kinase-like (PK-like) | 35 | 3 |  |
| Metalloproteases ("zincins"), catalytic domain | ADP-ribosylation | 35 | 3 |  |
| Nop domain | 35 | 5 |  |
| P-loop containing nucleoside triphosphate hydrolases | Helical scaffold and wing domains of SecA | 35 | 5 |  |
| UROD/MetE-like | UROD/MetE-like | 34 | 4 |  |
| Sec7 domain | P-loop containing nucleoside triphosphate hydrolases | 34 | 5 |  |
| FYVE/PHD zinc finger | FYVE/PHD zinc finger | 34 | 4 |  |
| Lysozyme-like | beta-lactamase/transpeptidase-like | 34 | 8 |  |
| E set domains | Six-hairpin glycosidases | 34 | 6 |  |
| HLH, helix-loop-helix DNA-binding domain | PYP-like sensor domain (PAS domain) | 34 | 3 |  |
| Cytochrome b5-like heme/steroid binding domain | Oxidoreductase molybdopterin-binding domain | 34 | 1 |  |
| Spermadhesin, CUB domain | Spermadhesin, CUB domain | 34 | 5 |  |
| NTF2-like | beta-lactamase/transpeptidase-like | 34 | 1 |  |
| Cell wall binding repeat | Cell wall binding repeat | 34 | 10 |  |
| EF-hand | EF-hand | 34 | 6 |  |
| PB2 C-terminal domain-like | 34 | 6 |  |
| lambda repressor-like DNA-binding domains | Homeodomain-like | 34 | 3 |  |
| a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) | 34 | 1 |  |
| Triger factor/SurA peptide-binding domain-like | FKBP-like | 34 | 5 |  |
| Ypt/Rab-GAP domain of gyp1p | Ypt/Rab-GAP domain of gyp1p | 34 | 2 |  |
| Clathrin heavy-chain terminal domain | ARM repeat | 34 | 3 |  |
| NTF2-like | Penicillin binding protein dimerisation domain | 34 | 1 |  |
| Trypsin-like serine proteases | 33 | 4 |  |
| Cytochrome b5-like heme/steroid binding domain | FMN-linked oxidoreductases | 33 | 2 |  |
| "Winged helix" DNA-binding domain | C-terminal domain of arginine repressor | 33 | 1 |  |
| Thioredoxin-like | FAD/NAD(P)-binding domain | 33 | 3 |  |
| SH3-domain | P-loop containing nucleoside triphosphate hydrolases | 33 | 3 |  |
| Phage tail proteins | Phage tail proteins | 33 | 3 |  |
| Adenine nucleotide alpha hydrolases-like | GMP synthetase C-terminal dimerisation domain | 33 | 3 |  |
| ADP-ribosylation | ADP-ribosylation | 33 | 2 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | DNA/RNA polymerases | 33 | 1 |  |
| Aerolisin/ETX pore-forming domain | Galactose-binding domain-like | 33 | 1 |  |
| UBA-like | Elongation factor Ts (EF-Ts), dimerisation domain | 33 | 4 |  |
| Complement control module/SCR domain | Trypsin-like serine proteases | 33 | 3 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | S-adenosyl-L-methionine-dependent methyltransferases | 33 | 14 |  |
| GFP-like | EF-hand | 33 | 5 |  |
| alpha/beta-Hydrolases | 33 | 3 |  |
| alpha-helical ferredoxin | Nucleotide-binding domain | 33 | 3 |  |
| FMN-linked oxidoreductases | 33 | 1 |  |
| "Winged helix" DNA-binding domain | NosL/MerB-like | 33 | 1 |  |
| C2 domain (Calcium/lipid-binding domain, CaLB) | 33 | 2 |  |
| Calcium-dependent phosphotriesterase | WD40 repeat-like | 32 | 2 |  |
| PTS-regulatory domain, PRD | PTS-regulatory domain, PRD | 32 | 3 |  |
| Nucleotide-binding domain | Nucleotide-binding domain | 32 | 3 |  |
| Methylated DNA-protein cysteine methyltransferase domain | Methylated DNA-protein cysteine methyltransferase, C-terminal domain | 32 | 1 |  |
| Ubiquitin-like | RING/U-box | 32 | 4 |  |
| Ribonuclease H-like | JAB1/MPN domain | 32 | 3 |  |
| Periplasmic binding protein-like II | Lysozyme-like | 32 | 1 |  |
| Translation proteins | Translation proteins | 32 | 4 |  |
| Galactose oxidase, central domain | FYVE/PHD zinc finger | 32 | 2 |  |
| LDL receptor-like module | LDL receptor-like module | 32 | 9 |  |
| Ribosomal L27 protein-like | Eukaryotic type KH-domain (KH-domain type I) | 32 | 2 |  |
| Protease propeptides/inhibitors | Zn-dependent exopeptidases | 32 | 1 |  |
| Thiolase-like | Probable ACP-binding domain of malonyl-CoA ACP transacylase | 32 | 8 |  |
| Pseudouridine synthase | PUA domain-like | 32 | 2 |  |
| Ribonuclease H-like | Ribonuclease H-like | 32 | 3 |  |
| E set domains | 3-carboxy-cis,cis-mucoante lactonizing enzyme | 31 | 2 |  |
| EF-hand | PLC-like phosphodiesterases | 31 | 5 |  |
| FKBP12-rapamycin-binding domain of FKBP-rapamycin-associated protein (FRAP) | Protein kinase-like (PK-like) | 31 | 5 |  |
| FnI-like domain | FnI-like domain | 31 | 3 |  |
| 6-phosphogluconate dehydrogenase C-terminal domain-like | 31 | 3 |  |
| UDP-glucose/GDP-mannose dehydrogenase C-terminal domain | 31 | 3 |  |
| EF-hand | C2 domain (Calcium/lipid-binding domain, CaLB) | 31 | 5 |  |
| Periplasmic binding protein-like II | Hormone receptor domain | 31 | 3 |  |
| ARM repeat | FKBP12-rapamycin-binding domain of FKBP-rapamycin-associated protein (FRAP) | 31 | 5 |  |
| JAB1/MPN domain | JAB1/MPN domain | 31 | 3 |  |
| FMN-linked oxidoreductases | Nucleotide-binding domain | 31 | 2 |  |
| Ankyrin repeat | 31 | 7 |  |
| Cupredoxins | Peptidylarginine deiminase Pad4, middle domain | 31 | 5 |  |
| P-loop containing nucleoside triphosphate hydrolases | Signal peptide-binding domain | 31 | 3 |  |
| HAD-like | P-loop containing nucleoside triphosphate hydrolases | 31 | 2 |  |
| Macro domain-like | Macro domain-like | 31 | 3 |  |
| 4Fe-4S ferredoxins | Formate dehydrogenase/DMSO reductase, domains 1-3 | 31 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | Nucleotidylyl transferase | 31 | 3 |  |
| PLC-like phosphodiesterases | C2 domain (Calcium/lipid-binding domain, CaLB) | 31 | 5 |  |
| Calcium ATPase, transduction domain A | HAD-like | 31 | 7 |  |
| Aldehyde ferredoxin oxidoreductase, N-terminal domain | Aldehyde ferredoxin oxidoreductase, C-terminal domains | 30 | 1 |  |
| PYP-like sensor domain (PAS domain) | 30 | 3 |  |
| Ribokinase-like | 30 | 1 |  |
| Voltage-gated potassium channels | NAD(P)-binding Rossmann-fold domains | 30 | 3 |  |
| Leucine zipper domain | Head morphogenesis protein gp7 | 30 | 2 |  |
| EF-G C-terminal domain-like | 30 | 5 |  |
| Pheromone-binding domain of LuxR-like quorum-sensing transcription factors | C-terminal effector domain of the bipartite response regulators | 30 | 1 |  |
| Ribonuclease H-like | HRDC-like | 30 | 1 |  |
| HSP90 C-terminal domain | Cna protein B-type domain | 30 | 5 |  |
| GAF domain-like | 30 | 3 |  |
| Arabinanase/levansucrase/invertase | Ricin B-like lectins | 30 | 1 |  |
| Thiamin phosphate synthase | Ribokinase-like | 30 | 1 |  |
| Cna protein B-type domain | Cna protein B-type domain | 30 | 10 |  |
| PUA domain-like | S-adenosyl-L-methionine-dependent methyltransferases | 30 | 2 |  |
| HMG-box | HMG-box | 30 | 2 |  |
| Nucleotide cyclase | Nucleotide cyclase | 30 | 1 |  |
| Concanavalin A-like lectins/glucanases | Sialidases | 30 | 5 |  |
| DEATH domain | WD40 repeat-like | 30 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | PUA domain-like | 30 | 2 |  |
| Multiheme cytochromes | Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain | 29 | 1 |  |
| 2Fe-2S ferredoxin-like | Formate dehydrogenase/DMSO reductase, domains 1-3 | 29 | 2 |  |
| Metalloproteases ("zincins"), catalytic domain | STI-like | 29 | 1 |  |
| Class I glutamine amidotransferase-like | GMP synthetase C-terminal dimerisation domain | 29 | 2 |  |
| Spermadhesin, CUB domain | EGF/Laminin | 29 | 3 |  |
| Trefoil | Glycosyl hydrolase domain | 29 | 1 |  |
| TSP-1 type 1 repeat | LDL receptor-like module | 29 | 2 |  |
| Immunoglobulin-binding domains | 29 | 4 |  |
| Nucleotidylyl transferase | Ribosomal protein L25-like | 29 | 5 |  |
| Trefoil | Putative glucosidase YicI, C-terminal domain | 29 | 1 |  |
| Clostridium neurotoxins, "coiled-coil" domain | STI-like | 29 | 1 |  |
| cAMP-binding domain-like | 29 | 2 |  |
| Anaphylotoxins (complement system) | Terpenoid cyclases/Protein prenyltransferases | 29 | 4 |  |
| Nucleotidylyl transferase | Riboflavin kinase-like | 29 | 1 |  |
| Plexin repeat | 29 | 5 |  |
| Trefoil | Galactose mutarotase-like | 29 | 1 |  |
| Elongation factor Ts (EF-Ts), dimerisation domain | Elongation factor Ts (EF-Ts), dimerisation domain | 29 | 3 |  |
| Metalloproteases ("zincins"), catalytic domain | Metalloproteases ("zincins"), catalytic domain | 29 | 5 |  |
| Metalloproteases ("zincins"), catalytic domain | beta-Roll | 29 | 1 |  |
| Class I glutamine amidotransferase-like | Adenine nucleotide alpha hydrolases-like | 29 | 2 |  |
| Actin-like ATPase domain | Heat shock protein 70kD (HSP70), C-terminal subdomain | 29 | 2 |  |
| Multiheme cytochromes | FAD/NAD(P)-binding domain | 29 | 1 |  |
| Metallo-hydrolase/oxidoreductase | SCP-like | 29 | 2 |  |
| "Winged helix" DNA-binding domain | Class II aaRS and biotin synthetases | 29 | 2 |  |
| Trefoil | (Trans)glycosidases | 29 | 1 |  |
| vWA-like | SPOC domain-like | 28 | 3 |  |
| Glutathione synthetase ATP-binding domain-like | ClpP/crotonase | 28 | 4 |  |
| Carbon-nitrogen hydrolase | Adenine nucleotide alpha hydrolases-like | 28 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | DNA/RNA polymerases | 28 | 2 |  |
| Cullin homology domain | "Winged helix" DNA-binding domain | 28 | 3 |  |
| RuvA domain 2-like | DNA helicase RuvA subunit, C-terminal domain | 28 | 2 |  |
| "Helical backbone" metal receptor | Nitrile hydratase alpha chain | 28 | 1 |  |
| MurE/MurF N-terminal domain | MurD-like peptide ligases, catalytic domain | 28 | 2 |  |
| "Winged helix" DNA-binding domain | Chorismate lyase-like | 28 | 1 |  |
| Midkine | Midkine | 28 | 5 |  |
| Protease propeptides/inhibitors | Subtilisin-like | 28 | 3 |  |
| Rudiment single hybrid motif | ClpP/crotonase | 28 | 4 |  |
| Regulator of G-protein signaling, RGS | PH domain-like | 28 | 1 |  |
| Zinc beta-ribbon | Cyclin-like | 28 | 3 |  |
| Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane anchor | 28 | 1 |  |
| PreATP-grasp domain | ClpP/crotonase | 28 | 4 |  |
| a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase) | 28 | 5 |  |
| Nucleic acid-binding proteins | DNA helicase RuvA subunit, C-terminal domain | 28 | 2 |  |
| MurE/MurF N-terminal domain | MurD-like peptide ligases, peptide-binding domain | 28 | 2 |  |
| Voltage-gated potassium channels | TrkA C-terminal domain-like | 28 | 2 |  |
| TrkA C-terminal domain-like | TrkA C-terminal domain-like | 28 | 2 |  |
| Enzyme I of the PEP:sugar phosphotransferase system HPr-binding (sub)domain | Phosphohistidine domain | 28 | 2 |  |
| Cell wall binding repeat | (Trans)glycosidases | 28 | 4 |  |
| Nucleotide cyclase | 27 | 2 |  |
| N-terminal domain of eukaryotic peptide chain release factor subunit 1, ERF1 | L30e-like | 27 | 1 |  |
| Nucleic acid-binding proteins | Putative DNA-binding domain | 27 | 2 |  |
| SH2 domain | RING/U-box | 27 | 1 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | EndoU-like | 27 | 1 |  |
| Ribonuclease H-like | mu transposase, C-terminal domain | 27 | 4 |  |
| N-terminal domain of eukaryotic peptide chain release factor subunit 1, ERF1 | Translational machinery components | 27 | 1 |  |
| Glu-tRNAGln amidotransferase C subunit | Nucleotidylyl transferase | 27 | 3 |  |
| Putative DNA-binding domain | Anticodon-binding domain of PheRS | 27 | 2 |  |
| Succinyl-CoA synthetase domains | Succinyl-CoA synthetase domains | 27 | 3 |  |
| N-terminal domain of cbl (N-cbl) | RING/U-box | 27 | 1 |  |
| PheT/TilS domain | Anticodon-binding domain of PheRS | 27 | 2 |  |
| Ribosomal protein S5 domain 2-like | Eukaryotic type KH-domain (KH-domain type I) | 27 | 3 |  |
| C2 domain (Calcium/lipid-binding domain, CaLB) | C2 domain (Calcium/lipid-binding domain, CaLB) | 27 | 3 |  |
| Ubiquitin-like | RING/U-box | 27 | 5 |  |
| OMPA-like | OMPA-like | 27 | 5 |  |
| Bacterial immunoglobulin/albumin-binding domains | Bacterial immunoglobulin/albumin-binding domains | 27 | 7 |  |
| PGBD-like | Metalloproteases ("zincins"), catalytic domain | 27 | 5 |  |
| Nucleic acid-binding proteins | PheT/TilS domain | 27 | 2 |  |
| Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 | Eukaryotic type KH-domain (KH-domain type I) | 27 | 3 |  |
| Ribonuclease PH domain 2-like | Eukaryotic type KH-domain (KH-domain type I) | 27 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | Phosphoglycerate mutase-like | 27 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | RNI-like | 27 | 3 |  |
| EF-hand | RING/U-box | 27 | 1 |  |
| N-terminal domain of bifunctional PutA protein | FAD-linked oxidoreductase | 27 | 5 |  |
| CRISPR-associated protein | CRISPR-associated protein | 27 | 2 |  |
| L domain-like | Immunoglobulin | 27 | 4 |  |
| Bacterial adhesins | Cna protein B-type domain | 27 | 8 |  |
| Galactose-binding domain-like | E set domains | 27 | 4 |  |
| Nucleic acid-binding proteins | Anticodon-binding domain of PheRS | 27 | 2 |  |
| POZ domain | Voltage-gated potassium channels | 26 | 3 |  |
| Bacillus cereus metalloprotein-like | Bacillus cereus metalloprotein-like | 26 | 1 |  |
| E set domains | AMPKBI-like | 26 | 2 |  |
| Probable ACP-binding domain of malonyl-CoA ACP transacylase | S-adenosyl-L-methionine-dependent methyltransferases | 26 | 3 |  |
| Cytidine deaminase-like | Dihydrofolate reductase-like | 26 | 1 |  |
| DHH phosphoesterases | 26 | 2 |  |
| SET domain | RuBisCo LSMT C-terminal, substrate-binding domain | 26 | 2 |  |
| Formate/glycerate dehydrogenase catalytic domain-like | ACT-like | 26 | 2 |  |
| Glutathione synthetase ATP-binding domain-like | Phosphohistidine domain | 26 | 2 |  |
| Inhibitor of apoptosis (IAP) repeat | 26 | 1 |  |
| Quinoprotein alcohol dehydrogenase-like | WD40 repeat-like | 26 | 6 |  |
| Immunoglobulin-binding domains | 26 | 2 |  |
| E set domains | Transglutaminase, two C-terminal domains | 26 | 2 |  |
| Calcium-dependent phosphotriesterase | Calcium-dependent phosphotriesterase | 26 | 2 |  |
| EF-hand | 26 | 2 |  |
| Single hybrid motif | ClpP/crotonase | 26 | 3 |  |
| Adenine nucleotide alpha hydrolases-like | DHS-like NAD/FAD-binding domain | 26 | 2 |  |
| Adhesin YadA, collagen-binding domain | Leucine zipper domain | 26 | 7 |  |
| Di-copper centre-containing domain | Di-copper centre-containing domain | 26 | 5 |  |
| Cytokine | Cytokine | 26 | 2 |  |
| ACP-like | NAD(P)-binding Rossmann-fold domains | 26 | 3 |  |
| PYP-like sensor domain (PAS domain) | C-terminal effector domain of the bipartite response regulators | 26 | 2 |  |
| Uteroglobin-like | Uteroglobin-like | 26 | 1 |  |
| Six-hairpin glycosidases | Carbohydrate-binding domain | 26 | 1 |  |
| Nucleic acid-binding proteins | GAD domain-like | 26 | 1 |  |
| Metalloproteases ("zincins"), catalytic domain | SNARE fusion complex | 26 | 2 |  |
| C-terminal domain of mollusc hemocyanin | C-terminal domain of mollusc hemocyanin | 26 | 5 |  |
| N-terminal nucleophile aminohydrolases (Ntn hydrolases) | PRTase-like | 26 | 1 |  |
| Class II aaRS and biotin synthetases | GAD domain-like | 26 | 1 |  |
| Retrovirus capsid protein, N-terminal core domain | Retrovirus zinc finger-like domains | 25 | 2 |  |
| Probable ACP-binding domain of malonyl-CoA ACP transacylase | S-adenosyl-L-methionine-dependent methyltransferases | 25 | 2 |  |
| GFP-like | Bcl-2 inhibitors of programmed cell death | 25 | 4 |  |
| Thioesterase/thiol ester dehydrase-isomerase | NAD(P)-binding Rossmann-fold domains | 25 | 3 |  |
| DEATH domain | DEATH domain | 25 | 3 |  |
| UROD/MetE-like | 25 | 4 |  |
| Chromo domain-like | Chromo domain-like | 25 | 7 |  |
| ADC-like | P-loop containing nucleoside triphosphate hydrolases | 25 | 4 |  |
| SET domain | TPR-like | 25 | 1 |  |
| Aminopeptidase/glucanase lid domain | Zn-dependent exopeptidases | 25 | 4 |  |
| F1F0 ATP synthase subunit A | 25 | 1 |  |
| Ribonuclease H-like | HRDC-like | 25 | 4 |  |
| delta-Endotoxin (insectocide), N-terminal domain | Galactose-binding domain-like | 25 | 4 |  |
| Class II aaRS and biotin synthetases | SufE/NifU | 25 | 1 |  |
| Fibronectin type III | 25 | 5 |  |
| GreA transcript cleavage protein, N-terminal domain | FKBP-like | 25 | 1 |  |
| HIT-like | HIT-like | 25 | 3 |  |
| S15/NS1 RNA-binding domain | S15/NS1 RNA-binding domain | 25 | 11 |  |
| N-utilization substance G protein NusG, N-terminal domain | Translation proteins SH3-like domain | 25 | 3 |  |
| Ribosomal protein L25-like | 25 | 4 |  |
| Bacteriophage trimeric proteins domain | C-type lectin-like | 25 | 10 |  |
| Acid proteases | Acid proteases | 25 | 1 |  |
| Ribulose-phoshate binding barrel | Thioesterase/thiol ester dehydrase-isomerase | 24 | 2 |  |
| Ribulose-phoshate binding barrel | 24 | 2 |  |
| DNA polymerase beta, N-terminal domain-like | Nucleotidyltransferase | 24 | 3 |  |
| RING/U-box | WD40 repeat-like | 24 | 1 |  |
| Thioesterase/thiol ester dehydrase-isomerase | Thiolase-like | 24 | 2 |  |
| EF-hand | Inorganic pyrophosphatase | 24 | 3 |  |
| Voltage-gated potassium channels | EF-hand | 24 | 4 |  |
| Galactose-binding domain-like | Galactose-binding domain-like | 24 | 3 |  |
| F-box domain | RNI-like | 24 | 2 |  |
| Regulatory factor Nef | 24 | 2 |  |
| beta-beta-alpha zinc fingers | Leucine zipper domain | 24 | 3 |  |
| delta-Endotoxin (insectocide), N-terminal domain | delta-Endotoxin (insectocide), middle domain | 24 | 3 |  |
| MHC antigen-recognition domain | Immunoglobulin | 24 | 1 |  |
| FabD/lysophospholipase-like | Ribulose-phoshate binding barrel | 24 | 2 |  |
| Cobalamin (vitamin B12)-binding domain | 24 | 1 |  |
| Tricorn protease domain 2 | ClpP/crotonase | 24 | 1 |  |
| Tricorn protease domain 2 | PDZ domain-like | 24 | 1 |  |
| UBA-like | Elongation factor Ts (EF-Ts), dimerisation domain | 24 | 2 |  |
| Sialidases | Galactose-binding domain-like | 24 | 4 |  |
| Rap30/74 interaction domains | "Winged helix" DNA-binding domain | 24 | 4 |  |
| Metallo-hydrolase/oxidoreductase | 24 | 3 |  |
| Tricorn protease N-terminal domain | Tricorn protease domain 2 | 24 | 1 |  |
| Ribulose-phoshate binding barrel | NAD(P)-binding Rossmann-fold domains | 24 | 2 |  |
| Ribulose-phoshate binding barrel | Thiolase-like | 24 | 2 |  |
| Tricorn protease N-terminal domain | ClpP/crotonase | 24 | 1 |  |
| alpha-catenin/vinculin-like | alpha-catenin/vinculin-like | 24 | 7 |  |
| delta-Endotoxin (insectocide), middle domain | Galactose-binding domain-like | 24 | 3 |  |
| Formylmethanofuran:tetrahydromethanopterin formyltransferase | Formylmethanofuran:tetrahydromethanopterin formyltransferase | 24 | 1 |  |
| Tricorn protease N-terminal domain | PDZ domain-like | 24 | 1 |  |
| TIMP-like | 23 | 3 |  |
| Zn-dependent exopeptidases | Carboxypeptidase regulatory domain-like | 23 | 6 |  |
| PR-1-like | Crisp domain-like | 23 | 1 |  |
| vWA-like | Trypsin-like serine proteases | 23 | 2 |  |
| RNA-binding domain, RBD | L domain-like | 23 | 2 |  |
| Hemopexin-like domain | Hemopexin-like domain | 23 | 2 |  |
| Alpha-macroglobulin receptor domain | 23 | 3 |  |
| Anaphylotoxins (complement system) | Alpha-macroglobulin receptor domain | 23 | 3 |  |
| Domain of the SRP/SRP receptor G-proteins | Signal peptide-binding domain | 23 | 2 |  |
| WD40 repeat-like | 23 | 4 |  |
| Riboflavin synthase domain-like | Riboflavin synthase domain-like | 23 | 1 |  |
| Penicillin-binding protein 2x (pbp-2x), c-terminal domain | Penicillin-binding protein 2x (pbp-2x), c-terminal domain | 23 | 2 |  |
| gp5 N-terminal domain-like | Phage fibre proteins | 23 | 2 |  |
| Anaphylotoxins (complement system) | TIMP-like | 23 | 3 |  |
| A DNA-binding domain in eukaryotic transcription factors | Leucine zipper domain | 23 | 1 |  |
| Acylphosphatase/BLUF domain-like | Nucleotide cyclase | 23 | 1 |  |
| LeuD/IlvD-like | Aconitase iron-sulfur domain | 23 | 2 |  |
| Ankyrin repeat | Ankyrin repeat | 23 | 6 |  |
| N-terminal nucleophile aminohydrolases (Ntn hydrolases) | Adenine nucleotide alpha hydrolases-like | 22 | 2 |  |
| Voltage-gated potassium channels | cAMP-binding domain-like | 22 | 1 |  |
| NagB/RpiA/CoA transferase-like | 22 | 2 |  |
| UBC-like | Cysteine proteinases | 22 | 1 |  |
| Head and neck region of the ectodomain of NDV fusion glycoprotein | 22 | 5 |  |
| FKBP-like | FKBP-like | 22 | 5 |  |
| Periplasmic binding protein-like II | E6 C-terminal domain-like | 22 | 2 |  |
| FAD-binding/transporter-associated domain-like | Uridine diphospho-N-Acetylenolpyruvylglucosamine reductase, MurB, C-terminal domain | 22 | 3 |  |
| Trimerization domain of TRAF | TRAF domain-like | 22 | 1 |  |
| Carbamate kinase-like | Acyl-CoA N-acyltransferases (Nat) | 22 | 1 |  |
| alpha-D-mannose-specific plant lectins | alpha-D-mannose-specific plant lectins | 22 | 3 |  |
| Adenine nucleotide alpha hydrolases-like | Adenine nucleotide alpha hydrolases-like | 22 | 1 |  |
| beta-lactamase/transpeptidase-like | 22 | 4 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | DNA methylase specificity domain | 22 | 1 |  |
| Chaperone J-domain | Thioredoxin-like | 22 | 3 |  |
| Class II aaRS ABD-related | 22 | 2 |  |
| STAT | p53-like transcription factors | 22 | 2 |  |
| p53-like transcription factors | SH2 domain | 22 | 2 |  |
| 4Fe-4S ferredoxins | Fe-only hydrogenase | 22 | 2 |  |
| Fumarylacetoacetate hydrolase, FAH, N-terminal domain | FAH | 22 | 1 |  |
| Arp2/3 complex subunits | Arp2/3 complex subunits | 22 | 1 |  |
| L30e-like | alpha/beta knot | 22 | 1 |  |
| BAH domain | S-adenosyl-L-methionine-dependent methyltransferases | 22 | 4 |  |
| STAT | SH2 domain | 22 | 2 |  |
| YjeF N-terminal domain-like | Ribokinase-like | 22 | 1 |  |
| Periplasmic binding protein-like II | RING/U-box | 22 | 1 |  |
| Non-globular alpha+beta subunits of globular proteins | ISP transmembrane anchor | 22 | 1 |  |
| MIT domain | P-loop containing nucleoside triphosphate hydrolases | 22 | 2 |  |
| Tryptophan synthase beta subunit-like PLP-dependent enzymes | CBS-domain pair | 22 | 3 |  |
| Fibronectin type III | Protein kinase-like (PK-like) | 22 | 3 |  |
| EGF/Laminin | Calcium-dependent phosphotriesterase | 22 | 6 |  |
| FYVE/PHD zinc finger | Clavaminate synthase-like | 22 | 3 |  |
| Non-globular alpha+beta subunits of globular proteins | ISP domain | 22 | 1 |  |
| Homocysteine S-methyltransferase | Dihydropteroate synthetase-like | 21 | 4 |  |
| "Winged helix" DNA-binding domain | Iron-dependent repressor protein, dimerization domain | 21 | 4 |  |
| S15/NS1 RNA-binding domain | Class II aaRS ABD-related | 21 | 3 |  |
| Snake toxin-like | Snake toxin-like | 21 | 2 |  |
| BAR/IMD domain-like | PH domain-like | 21 | 1 |  |
| Galactose-binding domain-like | Agglutinin HPA-like | 21 | 1 |  |
| NAD(P)-binding Rossmann-fold domains | 4'-phosphopantetheinyl transferase | 21 | 1 |  |
| vWA-like | Integrin alpha N-terminal domain | 21 | 3 |  |
| ARM repeat | Clathrin adaptor appendage domain | 21 | 1 |  |
| FabD/lysophospholipase-like | 4'-phosphopantetheinyl transferase | 21 | 1 |  |
| PDZ domain-like | 21 | 2 |  |
| Putative DNA-binding domain | Probable bacterial effector-binding domain | 21 | 1 |  |
| Mob1/phocein | 21 | 1 |  |
| Nudix | Phosphoglycerate mutase-like | 21 | 2 |  |
| Head and neck region of the ectodomain of NDV fusion glycoprotein | Leucine zipper domain | 21 | 3 |  |
| MurE/MurF N-terminal domain | Trimeric LpxA-like enzymes | 21 | 1 |  |
| Thiolase-like | 4'-phosphopantetheinyl transferase | 21 | 1 |  |
| Kazal-type serine protease inhibitors | Kazal-type serine protease inhibitors | 21 | 4 |  |
| ACT-like | Aromatic aminoacid monoxygenases, catalytic and oligomerization domains | 21 | 3 |  |
| PYP-like sensor domain (PAS domain) | C-terminal effector domain of the bipartite response regulators | 21 | 1 |  |
| Sialidases | Phage fibre proteins | 21 | 1 |  |
| Rotavirus NSP2 fragment, N-terminal domain | Rotavirus NSP2 fragment, C-terminal domain | 21 | 1 |  |
| RING/U-box | Cysteine proteinases | 21 | 4 |  |
| Plexin repeat | E set domains | 21 | 4 |  |
| beta-N-acetylhexosaminidase-like domain | Hyaluronidase post-catalytic domain-like | 21 | 2 |  |
| ARM repeat | Subdomain of clathrin and coatomer appendage domain | 21 | 1 |  |
| TPR-like | Fic-like | 20 | 1 |  |
| Retrovirus capsid protein, N-terminal core domain | Retrovirus zinc finger-like domains | 20 | 2 |  |
| S15/NS1 RNA-binding domain | Class II aaRS and biotin synthetases | 20 | 2 |  |
| Actin-crosslinking proteins | Actin-crosslinking proteins | 20 | 1 |  |
| Nucleotide-diphospho-sugar transferases | UDP-Glycosyltransferase/glycogen phosphorylase | 20 | 1 |  |
| Chemotaxis receptor methyltransferase CheR, N-terminal domain | S-adenosyl-L-methionine-dependent methyltransferases | 20 | 1 |  |
| FAD/NAD(P)-binding domain | Aminomethyltransferase beta-barrel domain | 20 | 2 |  |
| ACT-like | Formyltransferase | 20 | 1 |  |
| Myosin rod fragments | Myosin rod fragments | 20 | 6 |  |
| LysM domain | LysM domain | 20 | 7 |  |
| Leucine zipper domain | 20 | 3 |  |
| Head and neck region of the ectodomain of NDV fusion glycoprotein | 20 | 2 |  |
| HSP40/DnaJ peptide-binding domain | HSP40/DnaJ peptide-binding domain | 20 | 4 |  |
| Nucleotide-binding domain | 4Fe-4S ferredoxins | 20 | 1 |  |
| Acyl-CoA dehydrogenase C-terminal domain-like | 20 | 2 |  |
| EF-hand | Inorganic pyrophosphatase | 20 | 8 |  |
| 2,3-Bisphosphoglycerate-independent phosphoglycerate mutase, substrate-binding domain | Alkaline phosphatase-like | 20 | 1 |  |
| alpha-helical ferredoxin | 4Fe-4S ferredoxins | 20 | 1 |  |
| FMN-linked oxidoreductases | 4Fe-4S ferredoxins | 20 | 1 |  |
| "Winged helix" DNA-binding domain | Protein kinase-like (PK-like) | 20 | 2 |  |
| Acetyl-CoA synthetase-like | NAD(P)-binding Rossmann-fold domains | 20 | 1 |  |
| Dom34/Pelota N-terminal domain-like | L30e-like | 20 | 1 |  |
| Translin | 20 | 1 |  |
| Ubiquitin-like | FKBP-like | 20 | 1 |  |
| Urease, gamma-subunit | Urease, beta-subunit | 20 | 2 |  |
| Glutathione synthetase ATP-binding domain-like | Phosphoenolpyruvate/pyruvate domain | 20 | 1 |  |
| Galactose oxidase, central domain | E set domains | 20 | 3 |  |
| TPR-like | 20 | 4 |  |
| alpha-helical ferredoxin | FMN-linked oxidoreductases | 20 | 1 |  |
| Thiamin pyrophosphokinase, catalytic domain | Thiamin pyrophosphokinase, substrate-binding domain | 20 | 2 |  |
| ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | S13-like H2TH domain | 20 | 2 |  |
| Quinoprotein alcohol dehydrogenase-like | Calcium-dependent phosphotriesterase | 20 | 3 |  |
| FAD/NAD(P)-binding domain | Folate-binding domain | 20 | 2 |  |
| TolB, N-terminal domain | Tricorn protease N-terminal domain | 20 | 1 |  |
| Activating enzymes of the ubiquitin-like proteins | Activating enzymes of the ubiquitin-like proteins | 20 | 1 |  |
| Acyl-CoA dehydrogenase NM domain-like | 20 | 2 |  |
| Periplasmic binding protein-like II | Porphobilinogen deaminase (hydroxymethylbilane synthase), C-terminal domain | 20 | 2 |  |
| Retrovirus capsid dimerization domain-like | Retrovirus zinc finger-like domains | 20 | 2 |  |
| Dom34/Pelota N-terminal domain-like | Translational machinery components | 20 | 1 |  |
| Nucleotide-diphospho-sugar transferases | 20 | 2 |  |
| Nucleic acid-binding proteins | eIF2alpha middle domain-like | 20 | 2 |  |
| S13-like H2TH domain | Ribosomal protein S5 domain 2-like | 20 | 2 |  |
| PUA domain-like | 19 | 2 |  |
| Metalloproteases ("zincins"), catalytic domain | Hemopexin-like domain | 19 | 3 |  |
| Ribosomal protein S5 domain 2-like | Nucleic acid-binding proteins | 19 | 1 |  |
| Glycoside hydrolase/deacetylase | Carbohydrate binding domain | 19 | 1 |  |
| Arginyl-tRNA synthetase (ArgRS), N-terminal 'additional' domain | Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases | 19 | 2 |  |
| Nucleotidylyl transferase | Alpha-L RNA-binding motif | 19 | 1 |  |
| SAM/Pointed domain | SAM/Pointed domain | 19 | 9 |  |
| Zn2/Cys6 DNA-binding domain | Leucine zipper domain | 19 | 1 |  |
| Virus ectodomain | Fibritin | 19 | 3 |  |
| Barwin-like endoglucanases | PHL pollen allergen | 19 | 1 |  |
| Rubredoxin-like | Superoxide reductase-like | 19 | 1 |  |
| Arginyl-tRNA synthetase (ArgRS), N-terminal 'additional' domain | Nucleotidylyl transferase | 19 | 2 |  |
| Dcp2 domain-like | Nudix | 19 | 1 |  |
| Ribonuclease PH domain 2-like | Nucleic acid-binding proteins | 19 | 1 |  |
| tRNA-intron endonuclease catalytic domain-like | tRNA-intron endonuclease catalytic domain-like | 19 | 2 |  |
| Carbohydrate binding domain | Carbohydrate binding domain | 19 | 1 |  |
| Orange carotenoid protein, N-terminal domain | NTF2-like | 19 | 1 |  |
| Leukocidin-like | Ricin B-like lectins | 19 | 2 |  |
| MgtE N-terminal domain-like | CBS-domain pair | 19 | 1 |  |
| Restriction endonuclease-like | P-loop containing nucleoside triphosphate hydrolases | 19 | 4 |  |
| Methionine synthase domain | Cobalamin (vitamin B12)-binding domain | 19 | 2 |  |
| Sema domain | E set domains | 19 | 3 |  |
| Glutathione synthetase ATP-binding domain-like | Single hybrid motif | 19 | 2 |  |
| Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 | Nucleic acid-binding proteins | 19 | 1 |  |
| FAD-dependent thiol oxidase | 19 | 4 |  |
| Cytochrome b5-like heme/steroid binding domain | FMN-linked oxidoreductases | 18 | 1 |  |
| PH0987 N-terminal domain-like | Cyclophilin-like | 18 | 4 |  |
| LigB-like | LigA subunit of an aromatic-ring-opening dioxygenase LigAB | 18 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Homeodomain-like | 18 | 4 |  |
| Periplasmic binding protein-like II | Suppressor of Fused, N-terminal domain | 18 | 1 |  |
| GTPase activation domain, GAP | 18 | 3 |  |
| Glutamine synthetase/guanido kinase | Glutamine synthetase/guanido kinase | 18 | 2 |  |
| Ubiquitin-like | GTPase activation domain, GAP | 18 | 3 |  |
| 2Fe-2S ferredoxin-like | Fe-only hydrogenase | 18 | 1 |  |
| Methionyl-tRNA synthetase (MetRS), Zn-domain | Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases | 18 | 2 |  |
| Nucleotidylyl transferase | Nucleotidylyl transferase | 18 | 2 |  |
| EspE N-terminal domain-like | EspE N-terminal domain-like | 18 | 1 |  |
| ADP-ribosylation | Diphtheria toxin, middle domain | 18 | 1 |  |
| PurM N-terminal domain-like | PurM N-terminal domain-like | 18 | 3 |  |
| PYP-like sensor domain (PAS domain) | PH domain-like | 18 | 3 |  |
| Putative DNA-binding domain | Cobalamin (vitamin B12)-binding domain | 18 | 1 |  |
| PX domain | BAR/IMD domain-like | 18 | 3 |  |
| Metalloproteases ("zincins"), catalytic domain | 18 | 2 |  |
| FMN-linked oxidoreductases | Ribulose-phoshate binding barrel | 18 | 1 |  |
| N-terminal nucleophile aminohydrolases (Ntn hydrolases) | SIS domain | 18 | 1 |  |
| ADP-ribosylation | Diphtheria toxin, C-terminal domain | 18 | 1 |  |
| PurM C-terminal domain-like | PurM C-terminal domain-like | 18 | 3 |  |
| Coronavirus S2 glycoprotein | Leucine zipper domain | 18 | 2 |  |
| Creatinase/aminopeptidase | Creatinase/aminopeptidase | 18 | 3 |  |
| Diphtheria toxin, middle domain | Diphtheria toxin, C-terminal domain | 18 | 1 |  |
| HAMP domain-like | Homodimeric domain of signal transducing histidine kinase | 18 | 2 |  |
| BAR/IMD domain-like | 18 | 3 |  |
| DEATH domain | "Winged helix" DNA-binding domain | 18 | 1 |  |
| Immunoglobulin-binding domains | DEATH domain | 18 | 3 |  |
| C-type lectin-like | EGF/Laminin | 18 | 3 |  |
| CheY-like | KaiA/RbsU domain | 18 | 1 |  |
| Adhesin YadA, collagen-binding domain | Adhesin YadA, collagen-binding domain | 18 | 4 |  |
| p53-like transcription factors | p53 tetramerization domain | 18 | 1 |  |
| Phospholipase C/P1 nuclease | Lipase/lipooxygenase domain (PLAT/LH2 domain) | 18 | 1 |  |
| Methionyl-tRNA synthetase (MetRS), Zn-domain | Nucleotidylyl transferase | 18 | 2 |  |
| Collagen-binding domain | Collagen-binding domain | 18 | 7 |  |
| Second domain of FERM | SH2 domain | 18 | 4 |  |
| "Winged helix" DNA-binding domain | Actin-like ATPase domain | 18 | 2 |  |
| Resolvase-like | Homeodomain-like | 18 | 1 |  |
| IlvD/EDD N-terminal domain-like | LeuD/IlvD-like | 18 | 1 |  |
| BRCT domain | 18 | 4 |  |
| PH domain-like | SH2 domain | 18 | 4 |  |
| (Phosphotyrosine protein) phosphatases II | 18 | 2 |  |
| Cysteine proteinases | Glutathione synthetase ATP-binding domain-like | 17 | 1 |  |
| Prokaryotic type KH domain (KH-domain type II) | Metallo-hydrolase/oxidoreductase | 17 | 4 |  |
| Homocysteine S-methyltransferase | Dihydropteroate synthetase-like | 17 | 2 |  |
| Ricin B-like lectins | C-type lectin-like | 17 | 2 |  |
| Aldolase | 2-isopropylmalate synthase LeuA, allosteric (dimerisation) domain | 17 | 3 |  |
| alpha/beta-Hydrolases | beta-Roll | 17 | 1 |  |
| Ubiquitin-like | GTPase activation domain, GAP | 17 | 1 |  |
| Pre-PUA domain | PUA domain-like | 17 | 3 |  |
| Kringle-like | C-type lectin-like | 17 | 2 |  |
| N-utilization substance G protein NusG, N-terminal domain | N-utilization substance G protein NusG, N-terminal domain | 17 | 5 |  |
| Isocitrate/Isopropylmalate dehydrogenase-like | Isocitrate/Isopropylmalate dehydrogenase-like | 17 | 3 |  |
| 4Fe-4S ferredoxins | ADC-like | 17 | 1 |  |
| Multiheme cytochromes | 17 | 2 |  |
| Thioredoxin-like | FAD/NAD-linked reductases, dimerisation (C-terminal) domain | 17 | 1 |  |
| tRNA-intron endonuclease N-terminal domain-like | tRNA-intron endonuclease N-terminal domain-like | 17 | 1 |  |
| beta-Roll | beta-Roll | 17 | 1 |  |
| 2Fe-2S ferredoxin-like | ADC-like | 17 | 1 |  |
| DnaK suppressor protein DksA, alpha-hairpin domain | Glucocorticoid receptor-like (DNA-binding domain) | 17 | 1 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | 17 | 4 |  |
| Chaperone J-domain | Thioredoxin-like | 17 | 3 |  |
| Translation initiation factor 2 beta, aIF2beta, N-terminal domain | Zinc-binding domain of translation initiation factor 2 beta | 17 | 3 |  |
| Glucocorticoid receptor-like (DNA-binding domain) | Nuclear receptor ligand-binding domain | 17 | 4 |  |
| eIF2alpha middle domain-like | eIF-2-alpha, C-terminal domain | 17 | 2 |  |
| (Trans)glycosidases | Invasin/intimin cell-adhesion fragments | 17 | 4 |  |
| Cell wall binding repeat | Cell wall binding repeat | 17 | 3 |  |
| Uridine diphospho-N-Acetylenolpyruvylglucosamine reductase, MurB, C-terminal domain | 17 | 2 |  |
| SMAD/FHA domain | 17 | 2 |  |
| Galactose-binding domain-like | Fibronectin type III | 17 | 4 |  |
| Ricin B-like lectins | Kringle-like | 17 | 2 |  |
| Pectin lyase-like | Pectin lyase-like | 17 | 2 |  |
| "Winged helix" DNA-binding domain | Phospholipase D/nuclease | 17 | 2 |  |
| MgtE N-terminal domain-like | CBS-domain pair | 17 | 2 |  |
| SNARE-like | SNARE fusion complex | 17 | 1 |  |
| Bacterial muramidases | Lysozyme-like | 17 | 1 |  |
| TMV-like viral coat proteins | TMV-like viral coat proteins | 17 | 1 |  |
| Dimeric alpha+beta barrel | Dimeric alpha+beta barrel | 17 | 2 |  |
| Cysteine proteinases | PreATP-grasp domain | 17 | 1 |  |
| PH domain-like | PH domain-like | 17 | 4 |  |
| IlvD/EDD N-terminal domain-like | LeuD/IlvD-like | 17 | 5 |  |
| Glycosyl hydrolases family 6, cellulases | 17 | 1 |  |
| Metallo-dependent hydrolases | 16 | 2 |  |
| dsRNA-binding domain-like | dsRNA-binding domain-like | 16 | 6 |  |
| EGF/Laminin | Kringle-like | 16 | 1 |  |
| Nucleic acid-binding proteins | eIF-2-alpha, C-terminal domain | 16 | 1 |  |
| LysM domain | L,D-transpeptidase catalytic domain-like | 16 | 1 |  |
| Ankyrin repeat | Bacterial immunoglobulin/albumin-binding domains | 16 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | TGS-like | 16 | 1 |  |
| MOP-like | MOP-like | 16 | 2 |  |
| Actin-like ATPase domain | 16 | 4 |  |
| Trigger factor ribosome-binding domain | FKBP-like | 16 | 1 |  |
| DEATH domain | Caspase-like | 16 | 1 |  |
| Carbon-nitrogen hydrolase | 16 | 1 |  |
| ARM repeat | P-loop containing nucleoside triphosphate hydrolases | 16 | 3 |  |
| Growth factor receptor domain | Fibronectin type III | 16 | 4 |  |
| "Winged helix" DNA-binding domain | RNA-binding domain, RBD | 16 | 3 |  |
| Periplasmic binding protein-like II | Bcl-2 inhibitors of programmed cell death | 16 | 1 |  |
| alpha/beta-Hydrolases | Lipase/lipooxygenase domain (PLAT/LH2 domain) | 16 | 1 |  |
| Eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment | DNA breaking-rejoining enzymes | 16 | 2 |  |
| TPR-like | UDP-Glycosyltransferase/glycogen phosphorylase | 16 | 1 |  |
| Trigger factor ribosome-binding domain | Triger factor/SurA peptide-binding domain-like | 16 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Myosin rod fragments | 16 | 6 |  |
| N-acetylmuramoyl-L-alanine amidase-like | PGBD-like | 16 | 1 |  |
| Ribosome inactivating proteins (RIP) | 16 | 3 |  |
| R1 subunit of ribonucleotide reductase, N-terminal domain | PFL-like glycyl radical enzymes | 16 | 3 |  |
| Dimerization-anchoring domain of cAMP-dependent PK regulatory subunit | Bacterial immunoglobulin/albumin-binding domains | 16 | 1 |  |
| Periplasmic binding protein-like II | P-loop containing nucleoside triphosphate hydrolases | 16 | 1 |  |
| BAH domain | BAH domain | 16 | 3 |  |
| Duffy binding domain-like | 16 | 6 |  |
| Tudor/PWWP/MBT | 16 | 2 |  |
| LeuD/IlvD-like | 16 | 2 |  |
| Saposin | Metallo-dependent phosphatases | 15 | 2 |  |
| 2Fe-2S ferredoxin-like | Formate dehydrogenase/DMSO reductase, domains 1-3 | 15 | 1 |  |
| Ubiquitin-like | Moesin tail domain | 15 | 2 |  |
| Class II aaRS and biotin synthetases | ThrRS/AlaRS common domain | 15 | 5 |  |
| RuvA domain 2-like | RuvA domain 2-like | 15 | 6 |  |
| N-terminal nucleophile aminohydrolases (Ntn hydrolases) | Alpha subunit of glutamate synthase, C-terminal domain | 15 | 1 |  |
| Head and neck region of the ectodomain of NDV fusion glycoprotein | 15 | 2 |  |
| Elongation factor Ts (EF-Ts), dimerisation domain | P-loop containing nucleoside triphosphate hydrolases | 15 | 2 |  |
| Eukaryotic type KH-domain (KH-domain type I) | Eukaryotic type KH-domain (KH-domain type I) | 15 | 1 |  |
| FMN-linked oxidoreductases | Alpha subunit of glutamate synthase, C-terminal domain | 15 | 1 |  |
| beta-lactamase/transpeptidase-like | Penicillin-binding protein 2x (pbp-2x), c-terminal domain | 15 | 1 |  |
| Nudix | "Winged helix" DNA-binding domain | 15 | 1 |  |
| Acyl-CoA dehydrogenase C-terminal domain-like | 15 | 2 |  |
| EPT/RTPC-like | EPT/RTPC-like | 15 | 1 |  |
| UBA-like | P-loop containing nucleoside triphosphate hydrolases | 15 | 2 |  |
| UBA-like | Translation proteins | 15 | 2 |  |
| SH3-domain | SH3-domain | 15 | 7 |  |
| DNA/RNA polymerases | 15 | 2 |  |
| Second domain of FERM | 15 | 3 |  |
| RecA protein, C-terminal domain | RecA protein, C-terminal domain | 15 | 3 |  |
| PH0987 N-terminal domain-like | 15 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | Hcp1-like | 15 | 1 |  |
| Cytochrome f, large domain | Cytochrome f subunit of the cytochrome b6f complex, transmembrane anchor | 15 | 2 |  |
| p53-like transcription factors | DNA-binding protein LAG-1 (CSL) | 15 | 1 |  |
| EPT/RTPC-like | RNA 3'-terminal phosphate cyclase, RPTC, insert domain | 15 | 1 |  |
| UBA-like | EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain | 15 | 2 |  |
| Invasin/intimin cell-adhesion fragments | C-type lectin-like | 15 | 3 |  |
| Elongation factor Ts (EF-Ts), dimerisation domain | Translation proteins | 15 | 2 |  |
| Penicillin binding protein dimerisation domain | Penicillin-binding protein 2x (pbp-2x), c-terminal domain | 15 | 1 |  |
| alpha-ketoacid dehydrogenase kinase, N-terminal domain | ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | 15 | 1 |  |
| Zn-dependent exopeptidases | 15 | 1 |  |
| Restriction endonuclease-like | Rad51 N-terminal domain-like | 15 | 2 |  |
| FKBP-like | TPR-like | 15 | 2 |  |
| alpha/beta-Hydrolases | alpha/beta-Hydrolases | 15 | 2 |  |
| RING/U-box | TRAF domain-like | 15 | 1 |  |
| Cupredoxins | Cytochrome c | 15 | 3 |  |
| Leukocidin-like | Ricin B-like lectins | 15 | 1 |  |
| Elongation factor Ts (EF-Ts), dimerisation domain | EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain | 15 | 2 |  |
| DNA breaking-rejoining enzymes | Eukaryotic DNA topoisomerase I, dispensable insert domain | 15 | 1 |  |
| Phage tail proteins | gp5 N-terminal domain-like | 15 | 2 |  |
| Alpha-L RNA-binding motif | Pseudouridine synthase | 15 | 1 |  |
| Glycoside hydrolase/deacetylase | 15 | 1 |  |
| Thioredoxin-like | FAD-dependent thiol oxidase | 15 | 3 |  |
| HD-domain/PDEase-like | 15 | 2 |  |
| Eukaryotic DNA topoisomerase I, N-terminal DNA-binding fragment | Eukaryotic DNA topoisomerase I, dispensable insert domain | 15 | 1 |  |
| N-terminal nucleophile aminohydrolases (Ntn hydrolases) | FMN-linked oxidoreductases | 15 | 1 |  |
| Clavaminate synthase-like | Clavaminate synthase-like | 15 | 4 |  |
| Prokaryotic type KH domain (KH-domain type II) | Prokaryotic type KH domain (KH-domain type II) | 15 | 5 |  |
| DNA-binding protein LAG-1 (CSL) | E set domains | 15 | 1 |  |
| Rudiment single hybrid motif | Cytochrome f subunit of the cytochrome b6f complex, transmembrane anchor | 15 | 2 |  |
| Sec7 domain | PH domain-like | 14 | 3 |  |
| Class I glutamine amidotransferase-like | Glycosyl hydrolase domain | 14 | 1 |  |
| ATP-dependent DNA ligase DNA-binding domain | DNA ligase/mRNA capping enzyme, catalytic domain | 14 | 1 |  |
| DNA primase core | P-loop containing nucleoside triphosphate hydrolases | 14 | 1 |  |
| Alanine racemase C-terminal domain-like | Alanine racemase C-terminal domain-like | 14 | 1 |  |
| PRTase-like | 14 | 1 |  |
| Leucine zipper domain | Head morphogenesis protein gp7 | 14 | 3 |  |
| SAP domain | Ribonuclease H-like | 14 | 3 |  |
| Metallo-hydrolase/oxidoreductase | Rhodanese/Cell cycle control phosphatase | 14 | 2 |  |
| ATP-dependent DNA ligase DNA-binding domain | Nucleic acid-binding proteins | 14 | 1 |  |
| FAD/NAD-linked reductases, dimerisation (C-terminal) domain | Rhodanese/Cell cycle control phosphatase | 14 | 2 |  |
| FAD/NAD(P)-binding domain | 4Fe-4S ferredoxins | 14 | 2 |  |
| PMT central region-like | EreA/ChaN-like | 14 | 2 |  |
| DNA repair protein MutS, domain III | 14 | 2 |  |
| Ribulose-phoshate binding barrel | Ribulose-phoshate binding barrel | 14 | 2 |  |
| Metalloproteases ("zincins"), catalytic domain | Adenylylcyclase toxin (the edema factor) | 14 | 3 |  |
| Phage tail proteins | Phage fibre proteins | 14 | 1 |  |
| RNase III domain-like | RNase III domain-like | 14 | 4 |  |
| Carbamate kinase-like | PUA domain-like | 14 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Cobalamin (vitamin B12)-dependent enzymes | 14 | 1 |  |
| MalF N-terminal region-like | MetI-like | 14 | 1 |  |
| YojJ-like | RuvA domain 2-like | 14 | 1 |  |
| Kringle-like | Trypsin-like serine proteases | 14 | 4 |  |
| EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain | 14 | 3 |  |
| SMAD/FHA domain | Protein kinase-like (PK-like) | 14 | 2 |  |
| Cobalamin (vitamin B12)-binding domain | P-loop containing nucleoside triphosphate hydrolases | 14 | 1 |  |
| Lysozyme-like | PH domain-like | 14 | 3 |  |
| Single hybrid motif | Peripheral subunit-binding domain of 2-oxo acid dehydrogenase complex | 14 | 6 |  |
| Bromodomain | Bromodomain | 14 | 6 |  |
| Lysozyme-like | Cytochromes | 14 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | ACT-like | 14 | 1 |  |
| Lysozyme-like | 14 | 5 |  |
| Amidase signature (AS) enzymes | 14 | 2 |  |
| FAD/NAD(P)-binding domain | Rhodanese/Cell cycle control phosphatase | 14 | 2 |  |
| L domain-like | NTF2-like | 14 | 3 |  |
| Hedgehog/intein (Hint) domain | Homing endonucleases | 14 | 4 |  |
| Trimeric LpxA-like enzymes | 14 | 1 |  |
| Actin-like ATPase domain | Protein kinase-like (PK-like) | 14 | 2 |  |
| 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase, HPPK | Dihydropteroate synthetase-like | 14 | 3 |  |
| Rap30/74 interaction domains | Rap30/74 interaction domains | 13 | 2 |  |
| NHL repeat | YVTN repeat-like/Quinoprotein amine dehydrogenase | 13 | 2 |  |
| Globin-like | Ferredoxin reductase-like, C-terminal NADP-linked domain | 13 | 1 |  |
| Nucleic acid-binding proteins | Prokaryotic type KH domain (KH-domain type II) | 13 | 4 |  |
| ACP-like | Thiolase-like | 13 | 3 |  |
| Cytochrome P450 | 13 | 1 |  |
| N-utilization substance G protein NusG, N-terminal domain | N-utilization substance G protein NusG, N-terminal domain | 13 | 3 |  |
| PK beta-barrel domain-like | Phosphohistidine domain | 13 | 2 |  |
| S15/NS1 RNA-binding domain | Nucleotidylyl transferase | 13 | 1 |  |
| Chaperone J-domain | HSC20 (HSCB), C-terminal oligomerisation domain | 13 | 1 |  |
| Cloroperoxidase | Cloroperoxidase | 13 | 1 |  |
| N-terminal domain of bifunctional PutA protein | ALDH-like | 13 | 2 |  |
| Globin-like | Riboflavin synthase domain-like | 13 | 1 |  |
| E set domains | Terpenoid cyclases/Protein prenyltransferases | 13 | 1 |  |
| Elongation factor TFIIS domain 2 | Zinc beta-ribbon | 13 | 2 |  |
| Adenine nucleotide alpha hydrolases-like | MesJ substrate recognition domain-like | 13 | 2 |  |
| Notch domain | Notch domain | 13 | 1 |  |
| Formyltransferase | Ankyrin repeat | 13 | 1 |  |
| PK C-terminal domain-like | Phosphohistidine domain | 13 | 2 |  |
| Complement control module/SCR domain | vWA-like | 13 | 1 |  |
| Wiscott-Aldrich syndrome protein, WASP, C-terminal domain | Wiscott-Aldrich syndrome protein, WASP, C-terminal domain | 13 | 2 |  |
| Translation initiation factor IF3, N-terminal domain | Translation initiation factor IF3, C-terminal domain | 13 | 1 |  |
| ACP-like | alpha/beta-Hydrolases | 13 | 3 |  |
| Protein kinase-like (PK-like) | NTF2-like | 13 | 1 |  |
| ENTH/VHS domain | GAT-like domain | 13 | 2 |  |
| Galactose-binding domain-like | Galactose oxidase, central domain | 13 | 1 |  |
| "Winged helix" DNA-binding domain | "Winged helix" DNA-binding domain | 13 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | TrpR-like | 13 | 2 |  |
| Translation proteins | ThrRS/AlaRS common domain | 13 | 5 |  |
| (Trans)glycosidases | Beta-galactosidase LacA, domain 3 | 13 | 1 |  |
| Tudor/PWWP/MBT | Staphylococcal nuclease | 13 | 3 |  |
| Ankyrin repeat | beta-lactamase/transpeptidase-like | 13 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | C-terminal UvrC-binding domain of UvrB | 13 | 2 |  |
| Beta-galactosidase LacA, domain 3 | Galactose-binding domain-like | 13 | 1 |  |
| Ricin B-like lectins | Hemolytic lectin CEL-III, C-terminal domain | 13 | 1 |  |
| Growth factor receptor domain | TNF receptor-like | 13 | 4 |  |
| (Trans)glycosidases | Anthrax protective antigen | 13 | 2 |  |
| FMN-linked oxidoreductases | FAD/NAD(P)-binding domain | 13 | 2 |  |
| ArfGap/RecO-like zinc finger | Ankyrin repeat | 13 | 3 |  |
| E set domains | alpha/beta-Hydrolases | 13 | 1 |  |
| Plexin repeat | Plexin repeat | 13 | 1 |  |
| Glycosyl hydrolase domain | Beta-galactosidase LacA, domain 3 | 13 | 1 |  |
| Ricin B-like lectins | Cysteine proteinases | 13 | 1 |  |
| FMT C-terminal domain-like | Ankyrin repeat | 13 | 1 |  |
| beta-lactamase/transpeptidase-like | SpoIIaa-like | 13 | 1 |  |
| Homeodomain-like | 13 | 3 |  |
| Outer surface protein | Outer surface protein | 13 | 3 |  |
| Tudor/PWWP/MBT | FYVE/PHD zinc finger | 13 | 2 |  |
| CBD9-like | PHM/PNGase F | 13 | 1 |  |
| Bacteriophage trimeric proteins domain | C-type lectin-like | 13 | 1 |  |
| Formyltransferase | Acetyl-CoA synthetase-like | 12 | 2 |  |
| FAD-linked reductases, C-terminal domain | Aminomethyltransferase beta-barrel domain | 12 | 1 |  |
| GAF domain-like | Nucleotide cyclase | 12 | 2 |  |
| FKBP12-rapamycin-binding domain of FKBP-rapamycin-associated protein (FRAP) | 12 | 4 |  |
| Class II aaRS and biotin synthetases | 12 | 2 |  |
| 4Fe-4S ferredoxins | P-loop containing nucleoside triphosphate hydrolases | 12 | 1 |  |
| FAD-linked reductases, C-terminal domain | Folate-binding domain | 12 | 1 |  |
| HD-domain/PDEase-like | Nucleotidyltransferase | 12 | 2 |  |
| B-box zinc-binding domain | tRNA-binding arm | 12 | 1 |  |
| Class I glutamine amidotransferase-like | Class I glutamine amidotransferase-like | 12 | 1 |  |
| tRNA-binding arm | 12 | 1 |  |
| Immunoglobulin-binding domains | 12 | 1 |  |
| "Winged helix" DNA-binding domain | PLP-dependent transferases | 12 | 1 |  |
| PIN domain-like | Nucleic acid-binding proteins | 12 | 3 |  |
| Homeodomain-like | mu transposase, C-terminal domain | 12 | 2 |  |
| Dextranase, N-terminal domain | Pectin lyase-like | 12 | 1 |  |
| Lysozyme-like | E set domains | 12 | 1 |  |
| Carbohydrate phosphatase | 12 | 1 |  |
| Fibronectin type III | Immunoglobulin | 12 | 2 |  |
| Thioredoxin-like | ERP29 C domain-like | 12 | 1 |  |
| EV matrix protein | EV matrix protein | 12 | 2 |  |
| TSP-1 type 1 repeat | TSP-1 type 1 repeat | 12 | 6 |  |
| FAH | 12 | 1 |  |
| Formyltransferase | NAD(P)-binding Rossmann-fold domains | 12 | 1 |  |
| Glutaminase/Asparaginase | Ankyrin repeat | 12 | 1 |  |
| FabD/lysophospholipase-like | 12 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Fzo-like conserved region | 12 | 1 |  |
| PLP-dependent transferases | PLP-dependent transferases | 12 | 2 |  |
| Molybdenum cofactor biosynthesis proteins | CinA-like | 12 | 1 |  |
| FMN-linked oxidoreductases | FMN-linked oxidoreductases | 12 | 1 |  |
| Cysteine proteinases | 12 | 4 |  |
| Hedgehog/intein (Hint) domain | Hedgehog/intein (Hint) domain | 12 | 1 |  |
| Voltage-gated potassium channels | Small-conductance potassium channel | 12 | 1 |  |
| Uridine diphospho-N-Acetylenolpyruvylglucosamine reductase, MurB, C-terminal domain | 12 | 2 |  |
| L9 N-domain-like | EF-G C-terminal domain-like | 12 | 2 |  |
| Family A G protein-coupled receptor-like | E set domains | 12 | 1 |  |
| L9 N-domain-like | Translation proteins | 12 | 2 |  |
| Methyl-coenzyme M reductase alpha and beta chain C-terminal domain | 12 | 1 |  |
| Guanido kinase N-terminal domain | Guanido kinase N-terminal domain | 12 | 1 |  |
| Cobalamin adenosyltransferase-like | Ankyrin repeat | 12 | 1 |  |
| Nucleic acid-binding proteins | Retrovirus zinc finger-like domains | 12 | 1 |  |
| Cytidine deaminase-like | Cytidine deaminase-like | 12 | 1 |  |
| Dimerization-anchoring domain of cAMP-dependent PK regulatory subunit | cAMP-binding domain-like | 12 | 1 |  |
| PH domain-like | (Phosphotyrosine protein) phosphatases II | 12 | 3 |  |
| PH domain-like | C2 domain (Calcium/lipid-binding domain, CaLB) | 12 | 5 |  |
| Immunoglobulin-binding domains | gp120 core | 12 | 1 |  |
| beta-N-acetylhexosaminidase-like domain | Ricin B-like lectins | 12 | 1 |  |
| FMT C-terminal domain-like | NAD(P)-binding Rossmann-fold domains | 12 | 1 |  |
| Trimeric LpxA-like enzymes | RmlC-like cupins | 12 | 1 |  |
| Single hybrid motif | Peripheral subunit-binding domain of 2-oxo acid dehydrogenase complex | 12 | 3 |  |
| "Winged helix" DNA-binding domain | LexA/Signal peptidase | 12 | 1 |  |
| ADC synthase | 12 | 1 |  |
| C-type lectin-like | Bacterial enterotoxins | 12 | 1 |  |
| Enzyme I of the PEP:sugar phosphotransferase system HPr-binding (sub)domain | Phosphoenolpyruvate/pyruvate domain | 12 | 1 |  |
| Creatinase/aminopeptidase | "Winged helix" DNA-binding domain | 12 | 4 |  |
| SH3-domain | Ankyrin repeat | 12 | 2 |  |
| Leucine zipper domain | Virus attachment protein globular domain | 12 | 2 |  |
| ARM repeat | WD40 repeat-like | 12 | 4 |  |
| ParB/Sulfiredoxin | KorB DNA-binding domain-like | 12 | 1 |  |
| L9 N-domain-like | P-loop containing nucleoside triphosphate hydrolases | 12 | 2 |  |
| GLA-domain | Kringle-like | 12 | 2 |  |
| Clc chloride channel | CBS-domain pair | 12 | 2 |  |
| CheY-like | P-loop containing nucleoside triphosphate hydrolases | 12 | 2 |  |
| UBA-like | 11 | 5 |  |
| Topoisomerase V catalytic domain-like | RuvA domain 2-like | 11 | 4 |  |
| PAZ domain | RNase III domain-like | 11 | 2 |  |
| A heparin-binding domain | Amyloid beta a4 protein copper binding domain (domain 2) | 11 | 1 |  |
| PGBD-like | 11 | 1 |  |
| PH domain-like | 11 | 1 |  |
| L domain-like | Fibronectin type III | 11 | 3 |  |
| Putative DNA-binding domain | Class II aaRS and biotin synthetases | 11 | 1 |  |
| Nucleotidyltransferase | Retrovirus zinc finger-like domains | 11 | 2 |  |
| Cu,Zn superoxide dismutase-like | Cu,Zn superoxide dismutase-like | 11 | 2 |  |
| 4Fe-4S ferredoxins | 4Fe-4S ferredoxins | 11 | 1 |  |
| PAP/OAS1 substrate-binding domain | Retrovirus zinc finger-like domains | 11 | 2 |  |
| Translation proteins | DNA/RNA polymerases | 11 | 1 |  |
| CCCH zinc finger | RNA-binding domain, RBD | 11 | 3 |  |
| PH domain-like | EF-hand | 11 | 4 |  |
| P-loop containing nucleoside triphosphate hydrolases | DNA/RNA polymerases | 11 | 1 |  |
| vWA-like | TSP-1 type 1 repeat | 11 | 2 |  |
| "Winged helix" DNA-binding domain | Protein kinase-like (PK-like) | 11 | 2 |  |
| Duffy binding domain-like | 11 | 2 |  |
| F-box domain | WD40 repeat-like | 11 | 1 |  |
| ACP-like | CoA-dependent acyltransferases | 11 | 4 |  |
| PH domain-like | PLC-like phosphodiesterases | 11 | 4 |  |
| NAD-binding domain of HMG-CoA reductase | Substrate-binding domain of HMG-CoA reductase | 11 | 2 |  |
| PYP-like sensor domain (PAS domain) | Nucleotide cyclase | 11 | 2 |  |
| YegP-like | YegP-like | 11 | 7 |  |
| Nucleotide cyclase | EAL domain-like | 11 | 3 |  |
| SH2 domain | SOCS box-like | 11 | 1 |  |
| Histone-fold | Histone-fold | 11 | 2 |  |
| UBA-like | DNA/RNA polymerases | 11 | 1 |  |
| ThrRS/AlaRS common domain | 11 | 3 |  |
| ThrRS/AlaRS common domain | 11 | 2 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | 11 | 3 |  |
| Sialidases | Galactose-binding domain-like | 11 | 1 |  |
| Head morphogenesis protein gp7 | EB1 dimerisation domain-like | 11 | 2 |  |
| UBC-like | UBA-like | 11 | 3 |  |
| Fucose-specific lectin | Fucose-specific lectin | 11 | 1 |  |
| PHP domain-like | AF1531-like | 11 | 2 |  |
| Sialidases | E set domains | 11 | 1 |  |
| Periplasmic binding protein-like II | Cytidine deaminase-like | 11 | 1 |  |
| Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases | 11 | 3 |  |
| Concanavalin A-like lectins/glucanases | EGF/Laminin | 11 | 5 |  |
| Ankyrin repeat | Protein kinase-like (PK-like) | 11 | 2 |  |
| NAD(P)-binding Rossmann-fold domains | Siroheme synthase middle domains-like | 11 | 2 |  |
| EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain | DNA/RNA polymerases | 11 | 1 |  |
| Elongation factor Ts (EF-Ts), dimerisation domain | DNA/RNA polymerases | 11 | 1 |  |
| Retrovirus zinc finger-like domains | 11 | 2 |  |
| CheY-like | CheY-like | 11 | 2 |  |
| ClpP/crotonase | PGBD-like | 11 | 1 |  |
| Carboxypeptidase regulatory domain-like | Type I dockerin domain | 11 | 2 |  |
| Diaminopimelate epimerase-like | Diaminopimelate epimerase-like | 11 | 1 |  |
| Sec-C motif | Sec-C motif | 11 | 1 |  |
| Invasin/intimin cell-adhesion fragments | Invasin/intimin cell-adhesion fragments | 11 | 6 |  |
| PDZ domain-like | PGBD-like | 11 | 1 |  |
| Class II aaRS and biotin synthetases | Translation proteins | 10 | 3 |  |
| Aldolase | AFP III-like domain | 10 | 1 |  |
| FAD-binding/transporter-associated domain-like | FAD-linked oxidases, C-terminal domain | 10 | 1 |  |
| BAR/IMD domain-like | BAR/IMD domain-like | 10 | 2 |  |
| beta-lactamase/transpeptidase-like | 10 | 4 |  |
| FKBP-like | 10 | 4 |  |
| Mitochondrial carrier | Mitochondrial carrier | 10 | 1 |  |
| YrdC/RibB | Actin-like ATPase domain | 10 | 2 |  |
| Aldolase | 2-isopropylmalate synthase LeuA, allosteric (dimerisation) domain | 10 | 1 |  |
| Tropomyosin | EB1 dimerisation domain-like | 10 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | Prokaryotic type KH domain (KH-domain type II) | 10 | 1 |  |
| FAD/NAD(P)-binding domain | Calponin-homology domain, CH-domain | 10 | 1 |  |
| Transcription factor NusA, N-terminal domain | Nucleic acid-binding proteins | 10 | 3 |  |
| Alanine racemase C-terminal domain-like | 10 | 3 |  |
| Bcl-2 inhibitors of programmed cell death | 10 | 1 |  |
| GFP-like | Bcl-2 inhibitors of programmed cell death | 10 | 1 |  |
| Putative anticodon-binding domain of alanyl-tRNA synthetase (AlaRS) | ThrRS/AlaRS common domain | 10 | 3 |  |
| TGS-like | ThrRS/AlaRS common domain | 10 | 3 |  |
| Enolase C-terminal domain-like | 10 | 1 |  |
| 4Fe-4S ferredoxins | ARM repeat | 10 | 1 |  |
| WW domain | Hect, E3 ligase catalytic domain | 10 | 3 |  |
| TPR-like | Metallo-dependent phosphatases | 10 | 1 |  |
| Periplasmic binding protein-like II | Pili subunits | 10 | 1 |  |
| L9 N-domain-like | Ribosomal protein S5 domain 2-like | 10 | 1 |  |
| EF-hand | Inorganic pyrophosphatase | 10 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | Prokaryotic type I DNA topoisomerase | 10 | 1 |  |
| Insect pheromone/odorant-binding proteins | Insect pheromone/odorant-binding proteins | 10 | 2 |  |
| Formiminotransferase domain of formiminotransferase-cyclodeaminase. | Formiminotransferase domain of formiminotransferase-cyclodeaminase. | 10 | 2 |  |
| dUTPase-like | dUTPase-like | 10 | 2 |  |
| GLA-domain | Trypsin-like serine proteases | 10 | 2 |  |
| Duffy binding domain-like | 10 | 3 |  |
| His-Me finger endonucleases | Recombination endonuclease VII, C-terminal and dimerization domains | 10 | 1 |  |
| vWA-like | Cysteine-rich domain | 10 | 1 |  |
| Acylphosphatase/BLUF domain-like | EAL domain-like | 10 | 1 |  |
| Putative anticodon-binding domain of alanyl-tRNA synthetase (AlaRS) | Translation proteins | 10 | 3 |  |
| N-utilization substance G protein NusG, insert domain | Translation proteins SH3-like domain | 10 | 1 |  |
| Acylphosphatase/BLUF domain-like | Actin-like ATPase domain | 10 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | PLP-dependent transferases | 10 | 1 |  |
| Complement control module/SCR domain | vWA-like | 10 | 1 |  |
| N-utilization substance G protein NusG, insert domain | N-utilization substance G protein NusG, N-terminal domain | 10 | 1 |  |
| Gated mechanosensitive channel | Lumazine synthase | 10 | 1 |  |
| DNA-glycosylase | Nudix | 10 | 1 |  |
| Putative glucosidase YicI, C-terminal domain | Galactose-binding domain-like | 10 | 1 |  |
| FabD/lysophospholipase-like | 10 | 3 |  |
| RNA-binding domain, RBD | 10 | 1 |  |
| (Trans)glycosidases | Acyl-CoA N-acyltransferases (Nat) | 10 | 2 |  |
| Acylphosphatase/BLUF domain-like | YrdC/RibB | 10 | 2 |  |
| DNA-binding domain | DNA breaking-rejoining enzymes | 10 | 1 |  |
| DEATH domain | RNI-like | 10 | 1 |  |
| Lissencephaly-1 protein (Lis-1, PAF-AH alpha) N-terminal domain | WD40 repeat-like | 10 | 1 |  |
| Prokaryotic SH3-related domain | Cysteine proteinases | 10 | 1 |  |
| C2 domain (Calcium/lipid-binding domain, CaLB) | FabD/lysophospholipase-like | 10 | 2 |  |
| Thiolase-like | 10 | 3 |  |
| PGBD-like | Lysozyme-like | 10 | 1 |  |
| Acyl-CoA N-acyltransferases (Nat) | Glyoxalase/Bleomycin resistance protein/Dihydroxybiphenyl dioxygenase | 10 | 1 |  |
| PDZ domain-like | P-loop containing nucleoside triphosphate hydrolases | 10 | 2 |  |
| FYSH domain | EF-G C-terminal domain-like | 10 | 1 |  |
| EF-hand | P-loop containing nucleoside triphosphate hydrolases | 10 | 2 |  |
| Hypothetical protein AF0491, middle domain | EF-G C-terminal domain-like | 10 | 1 |  |
| PDZ domain-like | SH3-domain | 10 | 2 |  |
| Transcription factor NusA, N-terminal domain | Prokaryotic type KH domain (KH-domain type II) | 10 | 3 |  |
| Hermes dimerisation domain | Ribonuclease H-like | 10 | 1 |  |
| Myosin rod fragments | Leucine zipper domain | 10 | 1 |  |
| FAD-linked reductases, C-terminal domain | Thioredoxin-like | 10 | 1 |  |
| Bacterial adhesins | Bacterial adhesins | 10 | 3 |  |
| Probable ACP-binding domain of malonyl-CoA ACP transacylase | 10 | 3 |  |
| Single hybrid motif | 10 | 2 |  |
| E set domains | NHL repeat | 10 | 4 |  |
| Ribonuclease H-like | RuvA domain 2-like | 10 | 5 |  |
| HSP90 C-terminal domain | 10 | 1 |  |
| Cation efflux protein transmembrane domain-like | Cation efflux protein cytoplasmic domain-like | 10 | 1 |  |
| post-HMGL domain-like | 2-isopropylmalate synthase LeuA, allosteric (dimerisation) domain | 10 | 1 |  |
| FYSH domain | Hypothetical protein AF0491, middle domain | 10 | 1 |  |
| Glycosyl hydrolase domain | Glycosyl hydrolase domain | 10 | 1 |  |
| Chitinase insertion domain | Invertebrate chitin-binding proteins | 9 | 1 |  |
| "Winged helix" DNA-binding domain | C-terminal domain of transcriptional repressors | 9 | 1 |  |
| CRAL/TRIO N-terminal domain | Supernatant protein factor (SPF), C-terminal domain | 9 | 2 |  |
| Bacterial immunoglobulin/albumin-binding domains | EF-hand | 9 | 1 |  |
| UBC-like | Cysteine proteinases | 9 | 1 |  |
| Nudix | Nudix | 9 | 2 |  |
| PurS-like | PurM C-terminal domain-like | 9 | 3 |  |
| Lysozyme-like | Phage fibre proteins | 9 | 1 |  |
| PLP-dependent transferases | 9 | 1 |  |
| Globin-like | Globin-like | 9 | 1 |  |
| CRAL/TRIO domain | Supernatant protein factor (SPF), C-terminal domain | 9 | 2 |  |
| GAF domain-like | HD-domain/PDEase-like | 9 | 3 |  |
| GST C-terminal domain-like | P-loop containing nucleoside triphosphate hydrolases | 9 | 2 |  |
| PLP-dependent transferases | Bacterial immunoglobulin/albumin-binding domains | 9 | 1 |  |
| DNA methylase specificity domain | DNA methylase specificity domain | 9 | 2 |  |
| Pectin lyase-like | 9 | 3 |  |
| Trypsin-like serine proteases | PDZ domain-like | 9 | 1 |  |
| Fibritin | Fibritin | 9 | 1 |  |
| Fibre shaft of virus attachment proteins | Fibritin | 9 | 1 |  |
| PP2C-like | Protein serine/threonine phosphatase 2C, C-terminal domain | 9 | 1 |  |
| Mannose 6-phosphate receptor domain | Mannose 6-phosphate receptor domain | 9 | 4 |  |
| FGAM synthase PurL, linker domain | PurM N-terminal domain-like | 9 | 2 |  |
| Alpha-macroglobulin receptor domain | 9 | 2 |  |
| Nucleic acid-binding proteins | ArfGap/RecO-like zinc finger | 9 | 1 |  |
| Periplasmic binding protein-like II | ACT-like | 9 | 2 |  |
| THUMP domain-like | S-adenosyl-L-methionine-dependent methyltransferases | 9 | 1 |  |
| RCC1/BLIP-II | CSL zinc finger | 9 | 1 |  |
| Urease, gamma-subunit | Composite domain of metallo-dependent hydrolases | 9 | 2 |  |
| beta-Galactosidase/glucuronidase domain | Invasin/intimin cell-adhesion fragments | 9 | 3 |  |
| SAM/Pointed domain | HD-domain/PDEase-like | 9 | 2 |  |
| THUMP domain-like | Adenine nucleotide alpha hydrolases-like | 9 | 1 |  |
| (Trans)glycosidases | Invertebrate chitin-binding proteins | 9 | 1 |  |
| BPTI-like | BPTI-like | 9 | 3 |  |
| FAD/NAD(P)-binding domain | HI0933 insert domain-like | 9 | 1 |  |
| Invasin/intimin cell-adhesion fragments | 9 | 3 |  |
| GroEL-intermediate domain like | GroEL apical domain-like | 9 | 2 |  |
| Peridinin-chlorophyll protein | Peridinin-chlorophyll protein | 9 | 3 |  |
| CSL zinc finger | 9 | 1 |  |
| Nucleotide-diphospho-sugar transferases | Guanosine diphospho-D-mannose pyrophosphorylase/mannose-6-phosphate isomerase linker domain | 9 | 1 |  |
| Uteroglobin-like | Uteroglobin-like | 9 | 1 |  |
| HCP-like | HCP-like | 9 | 3 |  |
| gp5 N-terminal domain-like | Lysozyme-like | 9 | 1 |  |
| Duffy binding domain-like | Duffy binding domain-like | 9 | 3 |  |
| BAH domain | FYVE/PHD zinc finger | 9 | 2 |  |
| FGAM synthase PurL, linker domain | PurM C-terminal domain-like | 9 | 2 |  |
| Leucine zipper domain | Fibre shaft of virus attachment proteins | 9 | 1 |  |
| Cullin repeat-like | Cullin homology domain | 9 | 1 |  |
| Dimeric alpha+beta barrel | Dimeric alpha+beta barrel | 9 | 4 |  |
| ACT-like | HAD-like | 9 | 1 |  |
| Cullin repeat-like | "Winged helix" DNA-binding domain | 9 | 1 |  |
| Periplasmic binding protein-like II | LexA/Signal peptidase | 9 | 2 |  |
| all-alpha NTP pyrophosphatases | 9 | 1 |  |
| Periplasmic binding protein-like II | Nuclear receptor ligand-binding domain | 9 | 1 |  |
| OmpA-like | 9 | 1 |  |
| ValRS/IleRS/LeuRS editing domain | 9 | 2 |  |
| RNA-binding domain, RBD | Ran binding protein zinc finger-like | 9 | 1 |  |
| Colipase-like | Colipase-like | 9 | 1 |  |
| Caspase-like | E set domains | 9 | 2 |  |
| Galactose-binding domain-like | Invasin/intimin cell-adhesion fragments | 9 | 3 |  |
| ARM repeat | "Winged helix" DNA-binding domain | 9 | 1 |  |
| CheY-like | Nucleotide cyclase | 9 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | Probable GTPase Der, C-terminal domain | 9 | 2 |  |
| Lysozyme-like | Cysteine proteinases | 8 | 1 |  |
| Thioredoxin-like | RNA-binding domain, RBD | 8 | 1 |  |
| Homing endonucleases | YcfA/nrd intein domain | 8 | 4 |  |
| Pentapeptide repeat-like | Pentapeptide repeat-like | 8 | 2 |  |
| CRAL/TRIO N-terminal domain | Supernatant protein factor (SPF), C-terminal domain | 8 | 2 |  |
| PurM N-terminal domain-like | Class I glutamine amidotransferase-like | 8 | 1 |  |
| Ubiquitin-like | Ras GEF | 8 | 2 |  |
| Calpain large subunit, middle domain (domain III) | EF-hand | 8 | 2 |  |
| C-terminal, gelsolin-like domain of Sec23/24 | Actin depolymerizing proteins | 8 | 1 |  |
| Zn-dependent exopeptidases | Carboxypeptidase regulatory domain-like | 8 | 2 |  |
| Cysteine proteinases | Calpain large subunit, middle domain (domain III) | 8 | 2 |  |
| PurS-like | PurM C-terminal domain-like | 8 | 1 |  |
| MIR domain | ARM repeat | 8 | 1 |  |
| WGR domain-like | Domain of poly(ADP-ribose) polymerase | 8 | 1 |  |
| Ribosomal L27 protein-like | Nucleic acid-binding proteins | 8 | 2 |  |
| WW domain | WW domain | 8 | 4 |  |
| ARM repeat | 8 | 1 |  |
| Carbamoyl phosphate synthetase, small subunit N-terminal domain | Class I glutamine amidotransferase-like | 8 | 4 |  |
| IP3 receptor type 1 binding core, domain 2 | ARM repeat | 8 | 1 |  |
| Trypsin-like serine proteases | Trypsin-like serine proteases | 8 | 1 |  |
| Head-binding domain of phage P22 tailspike protein | Leucine zipper domain | 8 | 1 |  |
| Periplasmic binding protein-like II | E6 C-terminal domain-like | 8 | 3 |  |
| Enzyme IIa from lactose specific PTS, IIa-lac | 8 | 1 |  |
| Bromodomain | Tudor/PWWP/MBT | 8 | 3 |  |
| Actin-like ATPase domain | HD-domain/PDEase-like | 8 | 1 |  |
| DNA ligase/mRNA capping enzyme, catalytic domain | RuvA domain 2-like | 8 | 2 |  |
| HprK N-terminal domain-like | PEP carboxykinase-like | 8 | 1 |  |
| GST C-terminal domain-like | P-loop containing nucleoside triphosphate hydrolases | 8 | 1 |  |
| Concanavalin A-like lectins/glucanases | EF-hand | 8 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Sec-C motif | 8 | 1 |  |
| PIN domain-like | Nucleic acid-binding proteins | 8 | 1 |  |
| "Helical backbone" metal receptor | 8 | 1 |  |
| Restriction endonuclease-like | RuvA domain 2-like | 8 | 1 |  |
| PurS-like | FGAM synthase PurL, linker domain | 8 | 1 |  |
| "Winged helix" DNA-binding domain | PRTase-like | 8 | 1 |  |
| Periplasmic binding protein-like II | 8 | 3 |  |
| Thioredoxin-like | P-loop containing nucleoside triphosphate hydrolases | 8 | 1 |  |
| DNA polymerase beta, N-terminal domain-like | Rad51 N-terminal domain-like | 8 | 1 |  |
| MbtH-like | Acetyl-CoA synthetase-like | 8 | 1 |  |
| ARM repeat | FKBP12-rapamycin-binding domain of FKBP-rapamycin-associated protein (FRAP) | 8 | 2 |  |
| PurS-like | PurM N-terminal domain-like | 8 | 1 |  |
| S15/NS1 RNA-binding domain | Ns1 effector domain-like | 8 | 1 |  |
| Major surface antigen p30, SAG1 | Major surface antigen p30, SAG1 | 8 | 4 |  |
| Acetyl-CoA synthetase-like | 8 | 3 |  |
| cAMP-binding domain-like | Acyl-CoA N-acyltransferases (Nat) | 8 | 1 |  |
| Galactose-binding domain-like | Hyaluronate lyase-like, C-terminal domain | 8 | 2 |  |
| Supernatant protein factor (SPF), C-terminal domain | 8 | 1 |  |
| HlyD-like secretion proteins | HlyD-like secretion proteins | 8 | 1 |  |
| Cytochrome b5-like heme/steroid binding domain | Oxidoreductase molybdopterin-binding domain | 8 | 1 |  |
| Nucleic acid-binding proteins | Class II aaRS and biotin synthetases | 8 | 2 |  |
| Transcription factor IIA (TFIIA), alpha-helical domain | Transcription factor IIA (TFIIA), beta-barrel domain | 8 | 1 |  |
| FAH | FAH | 8 | 1 |  |
| SNARE fusion complex | 8 | 1 |  |
| Coiled-coil domain of nucleotide exchange factor GrpE | Head domain of nucleotide exchange factor GrpE | 8 | 3 |  |
| tRNA-guanine transglycosylase | Pre-PUA domain | 8 | 1 |  |
| WD40 repeat-like | DPP6 N-terminal domain-like | 8 | 1 |  |
| Cloacin translocation domain | Colicin E3 receptor domain | 8 | 2 |  |
| cAMP-binding domain-like | Ubiquitin-like | 8 | 2 |  |
| SRCR-like | Trypsin-like serine proteases | 8 | 2 |  |
| Ribonuclease H-like | RNA-binding domain, RBD | 8 | 3 |  |
| tRNA-guanine transglycosylase | PUA domain-like | 8 | 1 |  |
| Class I glutamine amidotransferase-like | Ribulose-phoshate binding barrel | 8 | 1 |  |
| Sialidases | Galactose-binding domain-like | 8 | 1 |  |
| WGR domain-like | ADP-ribosylation | 8 | 1 |  |
| CBS-domain pair | MgtE membrane domain-like | 8 | 1 |  |
| Rad51 N-terminal domain-like | PHP domain-like | 8 | 1 |  |
| Galactose-binding domain-like | Six-hairpin glycosidases | 8 | 4 |  |
| cAMP-binding domain-like | Ras GEF | 8 | 2 |  |
| Arabinanase/levansucrase/invertase | Galactose-binding domain-like | 8 | 2 |  |
| Rad51 N-terminal domain-like | Nucleotidyltransferase | 8 | 1 |  |
| YojJ-like | RuvA domain 2-like | 8 | 1 |  |
| Cytochrome b5-like heme/steroid binding domain | E set domains | 8 | 1 |  |
| Prismane protein-like | 8 | 1 |  |
| ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | CheW-like | 8 | 2 |  |
| Uteroglobin-like | Uteroglobin-like | 8 | 2 |  |
| "Winged helix" DNA-binding domain | MOP-like | 8 | 1 |  |
| MgtE N-terminal domain-like | MgtE membrane domain-like | 8 | 1 |  |
| PGBD-like | Kringle-like | 8 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | Prismane protein-like | 8 | 1 |  |
| Multidrug efflux transporter AcrB TolC docking domain; DN and DC subdomains | Multidrug efflux transporter AcrB transmembrane domain | 8 | 4 |  |
| DNA polymerase beta, N-terminal domain-like | PHP domain-like | 8 | 1 |  |
| Triger factor/SurA peptide-binding domain-like | FKBP-like | 8 | 1 |  |
| PurM C-terminal domain-like | Class I glutamine amidotransferase-like | 8 | 1 |  |
| E set domains | E set domains | 8 | 3 |  |
| Lipocalins | Lipocalins | 8 | 1 |  |
| PurS-like | Class I glutamine amidotransferase-like | 8 | 1 |  |
| TPR-like | Clavaminate synthase-like | 8 | 1 |  |
| SNARE fusion complex | SNARE fusion complex | 8 | 1 |  |
| Spectrin repeat | Spectrin repeat | 8 | 3 |  |
| Prismane protein-like | 8 | 1 |  |
| DUSP-like | Ubiquitin-like | 8 | 2 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | NAD(P)-binding Rossmann-fold domains | 8 | 2 |  |
| Formiminotransferase domain of formiminotransferase-cyclodeaminase. | Methenyltetrahydrofolate cyclohydrolase-like | 8 | 1 |  |
| Gamma-glutamyl cyclotransferase-like | Gamma-glutamyl cyclotransferase-like | 8 | 4 |  |
| Cysteine proteinases | EF-hand | 8 | 2 |  |
| Nucleotidyltransferase | PHP domain-like | 8 | 1 |  |
| Defensin-like | Defensin-like | 8 | 1 |  |
| Nucleic acid-binding proteins | S-adenosyl-L-methionine-dependent methyltransferases | 8 | 1 |  |
| Beta-D-glucan exohydrolase, C-terminal domain | Anthrax protective antigen | 8 | 1 |  |
| R3H domain | Ribonuclease H-like | 8 | 2 |  |
| Metalloproteases ("zincins"), catalytic domain | Kringle-like | 8 | 3 |  |
| tRNA-binding arm | 8 | 2 |  |
| E set domains | Type I dockerin domain | 8 | 3 |  |
| FGAM synthase PurL, linker domain | Class I glutamine amidotransferase-like | 8 | 1 |  |
| Cupredoxins | Galactose-binding domain-like | 8 | 4 |  |
| Hairpin loop containing domain-like | Trypsin-like serine proteases | 8 | 2 |  |
| Zn-binding domains of ADDBP | Zn-binding domains of ADDBP | 7 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Spectrin repeat | 7 | 1 |  |
| RuvA domain 2-like | 7 | 1 |  |
| Glutamyl tRNA-reductase catalytic, N-terminal domain | Glutamyl tRNA-reductase dimerization domain | 7 | 1 |  |
| Galactose-binding domain-like | Ricin B-like lectins | 7 | 2 |  |
| CheY-like | Homeodomain-like | 7 | 1 |  |
| Tex N-terminal region-like | Ribonuclease H-like | 7 | 3 |  |
| Domain of early E2A DNA-binding protein, ADDBP | Zn-binding domains of ADDBP | 7 | 1 |  |
| Carbohydrate binding domain | Lysozyme-like | 7 | 1 |  |
| Cytidine deaminase-like | 7 | 1 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | Putative methyltransferase TM0872, insert domain | 7 | 2 |  |
| Nudix | NADH pyrophosphatase intervening domain | 7 | 1 |  |
| Zn-dependent exopeptidases | Carboxypeptidase regulatory domain-like | 7 | 2 |  |
| CalX-like | CalX-like | 7 | 1 |  |
| "Winged helix" DNA-binding domain | MukF C-terminal domain-like | 7 | 2 |  |
| Thermostable phytase (3-phytase) | Thermostable phytase (3-phytase) | 7 | 1 |  |
| CCCH zinc finger | CCCH zinc finger | 7 | 4 |  |
| vWA-like | vWA-like | 7 | 2 |  |
| Restriction endonuclease-like | "Winged helix" DNA-binding domain | 7 | 2 |  |
| FAD-linked oxidases, C-terminal domain | 7 | 1 |  |
| NAD(P)-binding Rossmann-fold domains | Glutamyl tRNA-reductase dimerization domain | 7 | 1 |  |
| Galactose mutarotase-like | E set domains | 7 | 3 |  |
| ADC-like | P-loop containing nucleoside triphosphate hydrolases | 7 | 3 |  |
| Conserved domain common to transcription factors TFIIS, elongin A, CRSP70 | Zinc beta-ribbon | 7 | 1 |  |
| FMN-binding split barrel | FMN-binding split barrel | 7 | 1 |  |
| Sigma3 and sigma4 domains of RNA polymerase sigma factors | CheY-like | 7 | 1 |  |
| Fibronectin type III | Immunoglobulin | 7 | 2 |  |
| EF-G C-terminal domain-like | 7 | 1 |  |
| cAMP-binding domain-like | Protein kinase-like (PK-like) | 7 | 1 |  |
| Trefoil | Trefoil | 7 | 1 |  |
| Subtilisin-like | PA domain | 7 | 3 |  |
| Nucleotidyltransferase | Nucleotidyltransferase substrate binding subunit/domain | 7 | 2 |  |
| SH3-domain | DBL homology domain (DH-domain) | 7 | 4 |  |
| Spermadhesin, CUB domain | Galactose-binding domain-like | 7 | 2 |  |
| SAM/Pointed domain | ARM repeat | 7 | 1 |  |
| Integrin alpha N-terminal domain | 7 | 2 |  |
| Htr2 transmembrane domain-like | HAMP domain-like | 7 | 1 |  |
| HMG-box | 7 | 1 |  |
| SET domain | 7 | 1 |  |
| CoA-dependent acyltransferases | Acetyl-CoA synthetase-like | 7 | 2 |  |
| Single hybrid motif | CoA-dependent acyltransferases | 7 | 2 |  |
| Galactose-binding domain-like | EGF/Laminin | 7 | 3 |  |
| Intermediate filament protein, coiled coil region | 7 | 1 |  |
| N-terminal domains of the minor coat protein g3p | N-terminal domains of the minor coat protein g3p | 7 | 1 |  |
| Glutamyl tRNA-reductase catalytic, N-terminal domain | NAD(P)-binding Rossmann-fold domains | 7 | 1 |  |
| NEAT domain-like | NEAT domain-like | 7 | 1 |  |
| PYP-like sensor domain (PAS domain) | ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | 7 | 4 |  |
| Conserved domain common to transcription factors TFIIS, elongin A, CRSP70 | Elongation factor TFIIS domain 2 | 7 | 1 |  |
| Cytokine | Cytokine | 7 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | dsRNA-binding domain-like | 7 | 3 |  |
| Peripheral subunit-binding domain of 2-oxo acid dehydrogenase complex | CoA-dependent acyltransferases | 7 | 2 |  |
| Bactericidal permeability-increasing protein, BPI | Bactericidal permeability-increasing protein, BPI | 7 | 1 |  |
| Trypsin-like serine proteases | Pectin lyase-like | 7 | 2 |  |
| Alpha-lytic protease prodomain | Alpha-lytic protease prodomain | 7 | 1 |  |
| DNA helicase RuvA subunit, C-terminal domain | 7 | 1 |  |
| Ankyrin repeat | 7 | 2 |  |
| DPP6 N-terminal domain-like | 7 | 2 |  |
| Surp module (SWAP domain) | Surp module (SWAP domain) | 7 | 2 |  |
| Family A G protein-coupled receptor-like | Rubredoxin-like | 7 | 1 |  |
| Dihydropteroate synthetase-like | Nitrite and sulphite reductase 4Fe-4S domain-like | 7 | 1 |  |
| C-terminal domain of mollusc hemocyanin | C-terminal domain of mollusc hemocyanin | 7 | 1 |  |
| Kelch motif | Kelch motif | 7 | 1 |  |
| EGF/Laminin | TB module/8-cys domain | 7 | 1 |  |
| PUA domain-like | SET domain | 7 | 1 |  |
| Phosphoenolpyruvate/pyruvate domain | 7 | 2 |  |
| Nucleotidylyl transferase | Nudix | 7 | 1 |  |
| WW domain | Periplasmic binding protein-like II | 6 | 1 |  |
| Chorismate mutase II | Aldolase | 6 | 1 |  |
| TGS-like | ACT-like | 6 | 1 |  |
| Galactose-binding domain-like | Growth factor receptor domain | 6 | 2 |  |
| 2Fe-2S ferredoxin-like | Riboflavin synthase domain-like | 6 | 3 |  |
| Prokaryotic type KH domain (KH-domain type II) | Metallo-hydrolase/oxidoreductase | 6 | 1 |  |
| Tex N-terminal region-like | Ribonuclease H-like | 6 | 4 |  |
| HD-domain/PDEase-like | TGS-like | 6 | 1 |  |
| Frizzled cysteine-rich domain | Cytochromes | 6 | 2 |  |
| TPR-like | Protein prenylyltransferase | 6 | 3 |  |
| Siroheme synthase middle domains-like | Tetrapyrrole methylase | 6 | 1 |  |
| Trimeric LpxA-like enzymes | Trimeric LpxA-like enzymes | 6 | 1 |  |
| Docking domain B of the erythromycin polyketide synthase (DEBS) | FabD/lysophospholipase-like | 6 | 1 |  |
| SARS receptor-binding domain-like | Leucine zipper domain | 6 | 1 |  |
| PGBD-like | 6 | 2 |  |
| Tex N-terminal region-like | RuvA domain 2-like | 6 | 4 |  |
| HMA, heavy metal-associated domain | FAD/NAD(P)-binding domain | 6 | 1 |  |
| NAD(P)-binding Rossmann-fold domains | Flavoproteins | 6 | 1 |  |
| PPK N-terminal domain-like | Phospholipase D/nuclease | 6 | 1 |  |
| Docking domain B of the erythromycin polyketide synthase (DEBS) | Probable ACP-binding domain of malonyl-CoA ACP transacylase | 6 | 1 |  |
| TTHA1013/TTHA0281-like | Ribbon-helix-helix | 6 | 1 |  |
| Carbamoyl phosphate synthetase, small subunit N-terminal domain | Glutathione synthetase ATP-binding domain-like | 6 | 1 |  |
| Aldolase | NAD(P)-binding Rossmann-fold domains | 6 | 1 |  |
| Cystatin/monellin | 6 | 1 |  |
| Dehydroquinate synthase-like | 6 | 1 |  |
| Formyltransferase | ACP-like | 6 | 1 |  |
| beta-sandwich domain of Sec23/24 | beta-sandwich domain of Sec23/24 | 6 | 1 |  |
| Staphylocoagulase | Staphylocoagulase | 6 | 2 |  |
| Periplasmic binding protein-like II | Voltage-gated potassium channels | 6 | 1 |  |
| Multidrug resistance efflux transporter EmrE | Multidrug resistance efflux transporter EmrE | 6 | 1 |  |
| ArfGap/RecO-like zinc finger | PH domain-like | 6 | 1 |  |
| Docking domain B of the erythromycin polyketide synthase (DEBS) | Thiolase-like | 6 | 1 |  |
| Family A G protein-coupled receptor-like | UDP-Glycosyltransferase/glycogen phosphorylase | 6 | 2 |  |
| Retrovirus capsid dimerization domain-like | CcmK-like | 6 | 1 |  |
| ACT-like | 6 | 1 |  |
| Nucleotidylyl transferase | tRNA-binding arm | 6 | 1 |  |
| DNase I-like | 6 | 1 |  |
| Mannose-binding lectins | Mannose-binding lectins | 6 | 2 |  |
| TM1457-like | 6 | 1 |  |
| HMA, heavy metal-associated domain | Cu,Zn superoxide dismutase-like | 6 | 1 |  |
| CoA-dependent acyltransferases | alpha/beta-Hydrolases | 6 | 1 |  |
| Sensory domain-like | Sensory domain-like | 6 | 1 |  |
| Chromo domain-like | S-adenosyl-L-methionine-dependent methyltransferases | 6 | 1 |  |
| ValRS/IleRS/LeuRS editing domain | tRNA-binding arm | 6 | 1 |  |
| Influenza hemagglutinin (stalk) | Fibritin | 6 | 2 |  |
| PHP14-like | Phospholipase D/nuclease | 6 | 1 |  |
| Class II aaRS and biotin synthetases | YbaK/ProRS associated domain | 6 | 1 |  |
| Viral protein domain | Fibritin | 6 | 2 |  |
| Family A G protein-coupled receptor-like | 6 | 1 |  |
| Head-binding domain of phage P22 tailspike protein | Pectin lyase-like | 6 | 1 |  |
| Transcription factor NusA, N-terminal domain | Rad51 N-terminal domain-like | 6 | 2 |  |
| ALDH-like | 6 | 1 |  |
| Staphylococcal nuclease | Staphylococcal nuclease | 6 | 2 |  |
| PYP-like sensor domain (PAS domain) | PH domain-like | 6 | 1 |  |
| Six-hairpin glycosidases | Starch-binding domain-like | 6 | 2 |  |
| Nucleic acid-binding proteins | Rad51 N-terminal domain-like | 6 | 2 |  |
| Formate/glycerate dehydrogenase catalytic domain-like | Serine metabolism enzymes domain | 6 | 1 |  |
| Class I glutamine amidotransferase-like | Glutathione synthetase ATP-binding domain-like | 6 | 1 |  |
| Carbamoyl phosphate synthetase, small subunit N-terminal domain | Carbamoyl phosphate synthetase, large subunit connection domain | 6 | 1 |  |
| ADC-like | P-loop containing nucleoside triphosphate hydrolases | 6 | 1 |  |
| PH domain-like | BEACH domain | 6 | 1 |  |
| PH domain-like | SH3-domain | 6 | 4 |  |
| Hsp33 domain | HSP33 redox switch-like | 6 | 1 |  |
| SAM/Pointed domain | 6 | 2 |  |
| FMN-binding split barrel | 6 | 1 |  |
| Periplasmic binding protein-like II | Flavivirus capsid protein C | 6 | 1 |  |
| alpha/beta-Hydrolases | 6 | 1 |  |
| Class I glutamine amidotransferase-like | PreATP-grasp domain | 6 | 1 |  |
| Carbamoyl phosphate synthetase, small subunit N-terminal domain | Methylglyoxal synthase-like | 6 | 1 |  |
| ADP-ribosylation | ADP-ribosylation | 6 | 1 |  |
| 2Fe-2S ferredoxin-like | Ferredoxin reductase-like, C-terminal NADP-linked domain | 6 | 3 |  |
| P-loop containing nucleoside triphosphate hydrolases | GFP-like | 6 | 2 |  |
| Invasin/intimin cell-adhesion fragments | C-type lectin-like | 6 | 2 |  |
| HD-domain/PDEase-like | ACT-like | 6 | 1 |  |
| POZ domain | POZ domain | 6 | 1 |  |
| Prokaryotic type KH domain (KH-domain type II) | Rad51 N-terminal domain-like | 6 | 2 |  |
| Galactose oxidase, central domain | Kelch motif | 6 | 2 |  |
| "Winged helix" DNA-binding domain | Second domain of Mu2 adaptin subunit (ap50) of ap2 adaptor | 6 | 1 |  |
| Head domain of nucleotide exchange factor GrpE | 6 | 2 |  |
| TGS-like | 6 | 1 |  |
| Periplasmic binding protein-like II | Bcl-2 inhibitors of programmed cell death | 6 | 1 |  |
| Ubiquitin-like | SH3-domain | 6 | 2 |  |
| Serine metabolism enzymes domain | ACT-like | 6 | 1 |  |
| Cysteine proteinases | Ribonuclease H-like | 6 | 1 |  |
| DBL homology domain (DH-domain) | DBL homology domain (DH-domain) | 6 | 1 |  |
| Subtilisin-like | 6 | 4 |  |
| Carbamoyl phosphate synthetase, small subunit N-terminal domain | PreATP-grasp domain | 6 | 1 |  |
| Trimeric LpxA-like enzymes | ARM repeat | 6 | 1 |  |
| Urease, gamma-subunit | Composite domain of metallo-dependent hydrolases | 6 | 1 |  |
| Urease, gamma-subunit | Composite domain of metallo-dependent hydrolases | 6 | 2 |  |
| Carbamate kinase-like | ACT-like | 6 | 1 |  |
| ADC synthase | Class I glutamine amidotransferase-like | 6 | 1 |  |
| Nucleotide-diphospho-sugar transferases | Clavaminate synthase-like | 6 | 1 |  |
| Nucleic acid-binding proteins | "Winged helix" DNA-binding domain | 6 | 1 |  |
| HMA, heavy metal-associated domain | FAD/NAD-linked reductases, dimerisation (C-terminal) domain | 6 | 1 |  |
| Class I glutamine amidotransferase-like | Carbamoyl phosphate synthetase, large subunit connection domain | 6 | 1 |  |
| SNARE fusion complex | Clostridium neurotoxins, "coiled-coil" domain | 6 | 1 |  |
| LDL receptor-like module | EGF/Laminin | 6 | 5 |  |
| (Trans)glycosidases | gamma-Crystallin-like | 6 | 1 |  |
| Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases | tRNA-binding arm | 6 | 1 |  |
| Swiveling domain of dehydratase reactivase alpha subunit | Actin-like ATPase domain | 6 | 1 |  |
| Surface presentation of antigens (SPOA) | Surface presentation of antigens (SPOA) | 6 | 2 |  |
| Urease, beta-subunit | Composite domain of metallo-dependent hydrolases | 6 | 1 |  |
| TNF-like | TNF-like | 6 | 3 |  |
| Rhodanese/Cell cycle control phosphatase | 6 | 1 |  |
| Glycosyl hydrolase domain | Ricin B-like lectins | 6 | 1 |  |
| Calcium-dependent phosphotriesterase | 6 | 2 |  |
| Aminoacid dehydrogenase-like, N-terminal domain | NAD(P)-binding Rossmann-fold domains | 6 | 3 |  |
| Urease, beta-subunit | Metallo-dependent hydrolases | 6 | 1 |  |
| PDZ domain-like | Annexin | 6 | 1 |  |
| YbaK/ProRS associated domain | Class II aaRS ABD-related | 6 | 1 |  |
| Cystatin/monellin | Cystatin/monellin | 6 | 2 |  |
| PGBD-like | Lysozyme-like | 6 | 2 |  |
| Xylose isomerase-like | Glyoxalase/Bleomycin resistance protein/Dihydroxybiphenyl dioxygenase | 6 | 1 |  |
| Chaperone J-domain | HSP40/DnaJ peptide-binding domain | 6 | 2 |  |
| Uteroglobin-like | Uteroglobin-like | 6 | 2 |  |
| Class I glutamine amidotransferase-like | Methylglyoxal synthase-like | 6 | 1 |  |
| Class II aaRS ABD-related | 6 | 1 |  |
| Carboxypeptidase regulatory domain-like | NHL repeat | 6 | 3 |  |
| Nucleotide-diphospho-sugar transferases | Nucleotide-diphospho-sugar transferases | 6 | 1 |  |
| RING/U-box | TRAF domain-like | 6 | 1 |  |
| Acetyl-CoA synthetase-like | alpha/beta-Hydrolases | 6 | 1 |  |
| TSP type-3 repeat | Concanavalin A-like lectins/glucanases | 6 | 3 |  |
| Concanavalin A-like lectins/glucanases | Galactose-binding domain-like | 6 | 4 |  |
| Aldolase | Aminoacid dehydrogenase-like, N-terminal domain | 6 | 1 |  |
| Translation proteins | PRC-barrel domain | 6 | 1 |  |
| "Winged helix" DNA-binding domain | Phospholipase D/nuclease | 6 | 1 |  |
| TROVE domain-like | vWA-like | 6 | 1 |  |
| Kazal-type serine protease inhibitors | SRCR-like | 6 | 2 |  |
| Nucleotide-diphospho-sugar transferases | ARM repeat | 6 | 1 |  |
| XPC-binding domain | UBA-like | 6 | 2 |  |
| Nucleotidyltransferase | ACT-like | 6 | 1 |  |
| SRCR-like | LDL receptor-like module | 6 | 2 |  |
| Metalloproteases ("zincins"), catalytic domain | SNARE fusion complex | 6 | 1 |  |
| NAD(P)-binding Rossmann-fold domains | Serine metabolism enzymes domain | 6 | 1 |  |
| Nucleotidyltransferase | TGS-like | 6 | 1 |  |
| DNA breaking-rejoining enzymes | 6 | 1 |  |
| Ribosomal protein L1 | Ribosomal protein L1 | 6 | 1 |  |
| FAD-binding/transporter-associated domain-like | 6 | 1 |  |
| ARID-like | FYVE/PHD zinc finger | 6 | 1 |  |
| DinB/YfiT-like putative metalloenzymes | C-type lectin-like | 6 | 1 |  |
| NAD(P)-binding Rossmann-fold domains | Tetrapyrrole methylase | 6 | 1 |  |
| DBL homology domain (DH-domain) | PYP-like sensor domain (PAS domain) | 6 | 1 |  |
| Cullin repeat-like | "Winged helix" DNA-binding domain | 6 | 1 |  |
| C-terminal UvrC-binding domain of UvrB | 6 | 1 |  |
| Translation proteins SH3-like domain | Translation proteins SH3-like domain | 6 | 3 |  |
| Urease, gamma-subunit | Metallo-dependent hydrolases | 6 | 1 |  |
| 6-phosphogluconate dehydrogenase C-terminal domain-like | ACT-like | 6 | 1 |  |
| Phage fibre proteins | Fibritin | 6 | 1 |  |
| Uridine diphospho-N-Acetylenolpyruvylglucosamine reductase, MurB, C-terminal domain | 6 | 1 |  |
| ACP-like | 6 | 2 |  |
| lambda repressor-like DNA-binding domains | Cyanase C-terminal domain | 6 | 2 |  |
| PPK N-terminal domain-like | PHP14-like | 6 | 1 |  |
| ARID-like | Clavaminate synthase-like | 6 | 1 |  |
| Retrovirus capsid protein, N-terminal core domain | CcmK-like | 6 | 1 |  |
| EGF/Laminin | Calcium-dependent phosphotriesterase | 6 | 2 |  |
| Family A G protein-coupled receptor-like | 6 | 4 |  |
| Kazal-type serine protease inhibitors | LDL receptor-like module | 6 | 2 |  |
| BAH domain | Chromo domain-like | 6 | 1 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | Galactose oxidase, central domain | 6 | 1 |  |
| Actin-like ATPase domain | Protein kinase-like (PK-like) | 6 | 2 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | Protein kinase-like (PK-like) | 6 | 2 |  |
| Ricin B-like lectins | 6 | 1 |  |
| Peptide methionine sulfoxide reductase | Mss4-like | 6 | 1 |  |
| Trypsin-like serine proteases | 5 | 1 |  |
| RING/U-box | beta-beta-alpha zinc fingers | 5 | 2 |  |
| FAS1 domain | FAS1 domain | 5 | 3 |  |
| TPR-like | RING/U-box | 5 | 2 |  |
| E set domains | 3-carboxy-cis,cis-mucoante lactonizing enzyme | 5 | 2 |  |
| L27 domain | L27 domain | 5 | 2 |  |
| Spermadhesin, CUB domain | 5 | 2 |  |
| NAD(P)-linked oxidoreductase | 5 | 1 |  |
| EGF/Laminin | EF-hand | 5 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Hypothetical protein YjiA, C-terminal domain | 5 | 1 |  |
| Ubiquitin-like | Moesin tail domain | 5 | 1 |  |
| E6 C-terminal domain-like | E6 C-terminal domain-like | 5 | 2 |  |
| FnI-like domain | Kringle-like | 5 | 4 |  |
| IpsF-like | 5 | 1 |  |
| Integrin alpha N-terminal domain | Integrin alpha N-terminal domain | 5 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | RNase III domain-like | 5 | 2 |  |
| ThrRS/AlaRS common domain | Class II aaRS ABD-related | 5 | 2 |  |
| Cyclophilin-like | Single hybrid motif | 5 | 2 |  |
| DNA topoisomerase IV, alpha subunit | 5 | 1 |  |
| Chelatase | Chelatase | 5 | 2 |  |
| Immunoglobulin | Concanavalin A-like lectins/glucanases | 5 | 3 |  |
| PH0987 N-terminal domain-like | Single hybrid motif | 5 | 2 |  |
| Rudiment single hybrid motif | Cyclophilin-like | 5 | 2 |  |
| Periplasmic binding protein-like II | (Phosphotyrosine protein) phosphatases II | 5 | 1 |  |
| EGF/Laminin | TSP type-3 repeat | 5 | 2 |  |
| Histidine-containing phosphotransfer domain, HPT domain | Histidine-containing phosphotransfer domain, HPT domain | 5 | 2 |  |
| Sema domain | Immunoglobulin | 5 | 1 |  |
| Bowman-Birk inhibitor, BBI | Bowman-Birk inhibitor, BBI | 5 | 1 |  |
| Ribonuclease H-like | mu transposase, C-terminal domain | 5 | 2 |  |
| MCP/YpsA-like | 5 | 1 |  |
| Glyoxalase/Bleomycin resistance protein/Dihydroxybiphenyl dioxygenase | PDZ domain-like | 5 | 1 |  |
| Heme-dependent peroxidases | 5 | 1 |  |
| Cobalamin (vitamin B12)-binding domain | Methionine synthase activation domain-like | 5 | 1 |  |
| FAD/NAD(P)-binding domain | Cellulose-binding domain | 5 | 2 |  |
| PYP-like sensor domain (PAS domain) | Homodimeric domain of signal transducing histidine kinase | 5 | 3 |  |
| FAD-linked reductases, C-terminal domain | Cellulose-binding domain | 5 | 2 |  |
| Initiation factor IF2/eIF5b, domain 3 | 5 | 2 |  |
| PreATP-grasp domain | Cyclophilin-like | 5 | 2 |  |
| Glutathione synthetase ATP-binding domain-like | Cyclophilin-like | 5 | 2 |  |
| PilZ domain-like | PilZ domain-like | 5 | 1 |  |
| Anthrax protective antigen | Putative glucosidase YicI, C-terminal domain | 5 | 1 |  |
| Fibronectin type III | BRCT domain | 5 | 1 |  |
| Glyceraldehyde-3-phosphate dehydrogenase-like, C-terminal domain | ACT-like | 5 | 1 |  |
| Hormone receptor domain | Family A G protein-coupled receptor-like | 5 | 4 |  |
| Kringle-like | Spermadhesin, CUB domain | 5 | 2 |  |
| HAND domain of the nucleosome remodeling ATPase ISWI | Homeodomain-like | 5 | 3 |  |
| Viral protein domain | Viral protein domain | 5 | 2 |  |
| Glutathione synthetase ATP-binding domain-like | NAD(P)-binding Rossmann-fold domains | 5 | 1 |  |
| Restriction endonuclease-like | 5 | 1 |  |
| Rudiment single hybrid motif | PH0987 N-terminal domain-like | 5 | 2 |  |
| Apical membrane antigen 1 | 5 | 2 |  |
| ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | Type II DNA topoisomerase | 5 | 3 |  |
| SAM/Pointed domain | "Winged helix" DNA-binding domain | 5 | 2 |  |
| TB module/8-cys domain | Kazal-type serine protease inhibitors | 5 | 1 |  |
| Glutathione synthetase ATP-binding domain-like | PH0987 N-terminal domain-like | 5 | 2 |  |
| Colicin E3 receptor domain | His-Me finger endonucleases | 5 | 2 |  |
| gamma-Crystallin-like | gamma-Crystallin-like | 5 | 2 |  |
| Avidin/streptavidin | Avidin/streptavidin | 5 | 2 |  |
| Quinoprotein alcohol dehydrogenase-like | Cytochrome c | 5 | 1 |  |
| PH domain-like | Ras GEF | 5 | 2 |  |
| Ribosomal protein S5 domain 2-like | Type II DNA topoisomerase | 5 | 3 |  |
| Ribosome recycling factor, RRF | Ribosome recycling factor, RRF | 5 | 1 |  |
| PGBD-like | Hemopexin-like domain | 5 | 2 |  |
| ARM repeat | GUN4-like | 5 | 1 |  |
| EGF/Laminin | Complement control module/SCR domain | 5 | 2 |  |
| Perfringolysin | 5 | 1 |  |
| Plexin repeat | 5 | 1 |  |
| RNA-binding domain, RBD | DPP6 N-terminal domain-like | 5 | 4 |  |
| TGS-like | Class II aaRS and biotin synthetases | 5 | 2 |  |
| RNA bacteriophage capsid protein | RNA bacteriophage capsid protein | 5 | 1 |  |
| PriA/YqbF domain | 5 | 1 |  |
| UBA-like | UBA-like | 5 | 3 |  |
| Chaperone J-domain | Thioredoxin-like | 5 | 2 |  |
| SRCR-like | Trypsin-like serine proteases | 5 | 1 |  |
| Chromo domain-like | P-loop containing nucleoside triphosphate hydrolases | 5 | 3 |  |
| Chromo domain-like | P-loop containing nucleoside triphosphate hydrolases | 5 | 2 |  |
| Methionine synthase domain | Methionine synthase activation domain-like | 5 | 1 |  |
| beta-lactamase/transpeptidase-like | beta-lactamase/transpeptidase-like | 5 | 2 |  |
| Galactose mutarotase-like | Anthrax protective antigen | 5 | 1 |  |
| Periplasmic binding protein-like II | Synuclein | 5 | 1 |  |
| Subtilisin-like | 5 | 1 |  |
| Retrovirus zinc finger-like domains | Retrovirus zinc finger-like domains | 5 | 3 |  |
| TrmE connector domain | P-loop containing nucleoside triphosphate hydrolases | 5 | 2 |  |
| EGF/Laminin | Kazal-type serine protease inhibitors | 5 | 1 |  |
| SAICAR synthase-like | N5-CAIR mutase (phosphoribosylaminoimidazole carboxylase, PurE) | 5 | 1 |  |
| TSP type-3 repeat | TSP type-3 repeat | 5 | 2 |  |
| Bacterial immunoglobulin/albumin-binding domains | Protein kinase-like (PK-like) | 5 | 2 |  |
| NAD(P)-binding Rossmann-fold domains | RmlC-like cupins | 5 | 1 |  |
| Plexin repeat | Immunoglobulin | 5 | 1 |  |
| alpha-helical ferredoxin | FAD/NAD(P)-binding domain | 5 | 1 |  |
| E set domains | Fibronectin type III | 5 | 2 |  |
| Galactose oxidase, central domain | Galactose oxidase, central domain | 5 | 1 |  |
| Cyclophilin-like | Cyclophilin-like | 5 | 2 |  |
| Hormone receptor domain | Lysozyme-like | 5 | 1 |  |
| Sec7 domain | RalF, C-terminal domain | 5 | 3 |  |
| Carbohydrate-binding domain | Type I dockerin domain | 5 | 1 |  |
| Periplasmic binding protein-like II | Bactericidal permeability-increasing protein, BPI | 5 | 1 |  |
| Restriction endonuclease-like | 5 | 1 |  |
| Periplasmic binding protein-like II | Mitochondrial import receptor subunit Tom20 | 5 | 1 |  |
| Nuclear receptor ligand-binding domain | 5 | 1 |  |
| Second domain of FERM | Moesin tail domain | 5 | 1 |  |
| Serpins | 5 | 1 |  |
| Aldolase | Single hybrid motif | 5 | 1 |  |
| Ribonuclease PH domain 2-like | Eukaryotic type KH-domain (KH-domain type I) | 5 | 1 |  |
| Fic-like | Ankyrin repeat | 5 | 1 |  |
| Ribosome inactivating proteins (RIP) | 5 | 1 |  |
| Complement control module/SCR domain | 5 | 2 |  |
| Growth factor receptor domain | Calcium-dependent phosphotriesterase | 5 | 1 |  |
| Periplasmic binding protein-like II | Immunoglobulin | 5 | 2 |  |
| 4'-phosphopantetheinyl transferase | 4'-phosphopantetheinyl transferase | 5 | 2 |  |
| alpha-helical ferredoxin | ARM repeat | 5 | 1 |  |
| Phosphoglucomutase, C-terminal domain | 5 | 1 |  |
| TGS-like | Class II aaRS ABD-related | 5 | 2 |  |
| RNA-binding domain, RBD | Clavaminate synthase-like | 5 | 1 |  |
| LDL receptor-like module | Calcium-dependent phosphotriesterase | 5 | 4 |  |
| CCCH zinc finger | RING/U-box | 5 | 2 |  |
| Obg GTP-binding protein N-terminal domain | P-loop containing nucleoside triphosphate hydrolases | 5 | 2 |  |
| Galactose mutarotase-like | Starch-binding domain-like | 5 | 1 |  |
| alpha-helical ferredoxin | 5 | 1 |  |
| DBL homology domain (DH-domain) | Ras GEF | 5 | 2 |  |
| gp120 core | IpsF-like | 5 | 1 |  |
| Origin of replication-binding domain, RBD-like | P-loop containing nucleoside triphosphate hydrolases | 5 | 2 |  |
| TPR-like | ARM repeat | 5 | 2 |  |
| Dimeric alpha+beta barrel | Dimeric alpha+beta barrel | 5 | 1 |  |
| Saposin | SGNH hydrolase | 5 | 1 |  |
| Cadherin-like | Dystroglycan, domain 2 | 5 | 1 |  |
| C-terminal effector domain of the bipartite response regulators | 5 | 3 |  |
| PH domain-like | Moesin tail domain | 5 | 1 |  |
| Kazal-type serine protease inhibitors | EF-hand | 5 | 1 |  |
| Starch-binding domain-like | Galactose-binding domain-like | 5 | 1 |  |
| Anthrax protective antigen | Glycosyl hydrolase domain | 5 | 1 |  |
| PreATP-grasp domain | PH0987 N-terminal domain-like | 5 | 2 |  |
| Chitinase insertion domain | Chitinase insertion domain | 5 | 2 |  |
| DNA topoisomerase I domain | DNA breaking-rejoining enzymes | 5 | 1 |  |
| Caspase-like | E set domains | 5 | 1 |  |
| Carbohydrate-binding domain | Carboxypeptidase regulatory domain-like | 5 | 1 |  |
| Arginase/deacetylase | Arginase/deacetylase | 5 | 2 |  |
| Nucleotide cyclase | 5 | 3 |  |
| WW domain | Periplasmic binding protein-like II | 4 | 1 |  |
| PK beta-barrel domain-like | 4 | 1 |  |
| Frizzled cysteine-rich domain | Flavoproteins | 4 | 1 |  |
| HMA, heavy metal-associated domain | Calcium ATPase, transmembrane domain M | 4 | 2 |  |
| Carboxypeptidase regulatory domain-like | Calcium-dependent phosphotriesterase | 4 | 1 |  |
| Putative DNA-binding domain | P-loop containing nucleoside triphosphate hydrolases | 4 | 1 |  |
| GroES-like | ACP-like | 4 | 1 |  |
| Nucleic acid-binding proteins | BRCA2 tower domain | 4 | 2 |  |
| RNA-binding domain, RBD | PAP/OAS1 substrate-binding domain | 4 | 1 |  |
| POZ domain | Galactose oxidase, central domain | 4 | 1 |  |
| Fibronectin type III | Pectin lyase-like | 4 | 1 |  |
| "Winged helix" DNA-binding domain | Iron-dependent repressor protein, dimerization domain | 4 | 1 |  |
| Plexin repeat | EGF/Laminin | 4 | 1 |  |
| Dimeric alpha+beta barrel | 4 | 1 |  |
| SH2 domain | RING/U-box | 4 | 1 |  |
| FAD-linked reductases, C-terminal domain | 4Fe-4S ferredoxins | 4 | 1 |  |
| Dipeptidyl peptidase I (cathepsin C), exclusion domain | Cysteine proteinases | 4 | 1 |  |
| Phosphotyrosine protein phosphatases I | 4 | 1 |  |
| Periplasmic binding protein-like I | Homeodomain-like | 4 | 1 |  |
| N-terminal domains of the minor coat protein g3p | TolA/TonB C-terminal domain | 4 | 1 |  |
| Fibronectin type III | 4 | 3 |  |
| Chromo domain-like | DNA-binding domain of retroviral integrase | 4 | 1 |  |
| HBS1-like domain | P-loop containing nucleoside triphosphate hydrolases | 4 | 1 |  |
| Probable ACP-binding domain of malonyl-CoA ACP transacylase | S-adenosyl-L-methionine-dependent methyltransferases | 4 | 1 |  |
| Nucleic acid-binding proteins | BRCT domain | 4 | 1 |  |
| ATP-dependent DNA ligase DNA-binding domain | DNA ligase/mRNA capping enzyme, catalytic domain | 4 | 1 |  |
| Tex N-terminal region-like | Nucleic acid-binding proteins | 4 | 2 |  |
| RNA-binding domain, RBD | Cyclophilin-like | 4 | 1 |  |
| Cyanovirin-N | LysM domain | 4 | 2 |  |
| Amidase signature (AS) enzymes | Cyclophilin-like | 4 | 1 |  |
| CheY-like | EAL domain-like | 4 | 1 |  |
| Leukotriene A4 hydrolase N-terminal domain | Metalloproteases ("zincins"), catalytic domain | 4 | 3 |  |
| FabD/lysophospholipase-like | ACP-like | 4 | 1 |  |
| Calcium-dependent phosphotriesterase | WD40 repeat-like | 4 | 2 |  |
| Thioredoxin-like | NHL repeat | 4 | 1 |  |
| HBS1-like domain | EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain | 4 | 1 |  |
| Class II aaRS and biotin synthetases | 4 | 1 |  |
| RING/U-box | B-box zinc-binding domain | 4 | 2 |  |
| Cu,Zn superoxide dismutase-like | Cu,Zn superoxide dismutase-like | 4 | 1 |  |
| Enolase C-terminal domain-like | 4 | 1 |  |
| Snake toxin-like | Snake toxin-like | 4 | 1 |  |
| Snake toxin-like | Snake toxin-like | 4 | 1 |  |
| Tricorn protease N-terminal domain | alpha/beta-Hydrolases | 4 | 1 |  |
| EF-hand | Metallo-dependent phosphatases | 4 | 1 |  |
| Concanavalin A-like lectins/glucanases | ADP-ribosylation | 4 | 1 |  |
| LDL receptor-like module | Trypsin-like serine proteases | 4 | 1 |  |
| FAD-linked reductases, C-terminal domain | 4 | 2 |  |
| Chromo domain-like | Homeodomain-like | 4 | 2 |  |
| DNA ligase/mRNA capping enzyme, catalytic domain | BRCT domain | 4 | 1 |  |
| Formate/glycerate dehydrogenase catalytic domain-like | ACT-like | 4 | 1 |  |
| NAD(P)-binding Rossmann-fold domains | alpha/beta-Hydrolases | 4 | 1 |  |
| Enolase C-terminal domain-like | Nitrite and sulphite reductase 4Fe-4S domain-like | 4 | 1 |  |
| HMA, heavy metal-associated domain | HMA, heavy metal-associated domain | 4 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Tropomyosin | 4 | 1 |  |
| E set domains | GFP-like | 4 | 1 |  |
| SH2 domain | 4 | 3 |  |
| BRCA2 helical domain | Nucleic acid-binding proteins | 4 | 2 |  |
| TRAF domain-like | POZ domain | 4 | 1 |  |
| CCCH zinc finger | Tudor/PWWP/MBT | 4 | 1 |  |
| Concanavalin A-like lectins/glucanases | Exotoxin A, middle domain | 4 | 1 |  |
| Glutamine synthetase/guanido kinase | GAD domain-like | 4 | 1 |  |
| E set domains | Terpenoid cyclases/Protein prenyltransferases | 4 | 1 |  |
| YajQ-like | YajQ-like | 4 | 1 |  |
| DNA-glycosylase | 4 | 1 |  |
| RNA-binding domain, RBD | RNA-binding domain, RBD | 4 | 2 |  |
| L domain-like | DNase I-like | 4 | 1 |  |
| Elongation factor TFIIS domain 2 | Zinc beta-ribbon | 4 | 1 |  |
| Homeodomain-like | Probable bacterial effector-binding domain | 4 | 1 |  |
| C-terminal (heme d1) domain of cytochrome cd1-nitrite reductase | PKD domain | 4 | 1 |  |
| Thiolase-like | alpha/beta-Hydrolases | 4 | 1 |  |
| L,D-transpeptidase pre-catalytic domain-like | L,D-transpeptidase catalytic domain-like | 4 | 1 |  |
| Cyclin-like | TATA-box binding protein-like | 4 | 1 |  |
| Non-globular alpha+beta subunits of globular proteins | Non-globular alpha+beta subunits of globular proteins | 4 | 1 |  |
| Ran binding protein zinc finger-like | Ran binding protein zinc finger-like | 4 | 1 |  |
| S-adenosylmethionine synthetase | S-adenosylmethionine synthetase | 4 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | S-adenosyl-L-methionine-dependent methyltransferases | 4 | 2 |  |
| E set domains | Alpha-macroglobulin receptor domain | 4 | 1 |  |
| TSP type-3 repeat | OmpA-like | 4 | 1 |  |
| Fibronectin type III | Concanavalin A-like lectins/glucanases | 4 | 2 |  |
| Cytochrome c | E set domains | 4 | 1 |  |
| Conserved domain common to transcription factors TFIIS, elongin A, CRSP70 | Zinc beta-ribbon | 4 | 1 |  |
| TrpR-like | 4 | 1 |  |
| Exotoxin A, middle domain | ADP-ribosylation | 4 | 1 |  |
| ACT-like | PYP-like sensor domain (PAS domain) | 4 | 1 |  |
| Nucleic acid-binding proteins | Cytidine deaminase-like | 4 | 1 |  |
| "Winged helix" DNA-binding domain | HRDC-like | 4 | 1 |  |
| Cloacin translocation domain | Ribonuclease domain of colicin E3 | 4 | 1 |  |
| SNARE-like | Second domain of Mu2 adaptin subunit (ap50) of ap2 adaptor | 4 | 1 |  |
| EAL domain-like | Sensory domain-like | 4 | 1 |  |
| Translation proteins | "Winged helix" DNA-binding domain | 4 | 2 |  |
| Amidase signature (AS) enzymes | Single hybrid motif | 4 | 1 |  |
| LysM domain | (Trans)glycosidases | 4 | 2 |  |
| TAF(II)230 TBP-binding fragment | Bromodomain | 4 | 2 |  |
| HLH, helix-loop-helix DNA-binding domain | PYP-like sensor domain (PAS domain) | 4 | 1 |  |
| Colicin E3 receptor domain | Ribonuclease domain of colicin E3 | 4 | 1 |  |
| GroES-like | alpha/beta-Hydrolases | 4 | 1 |  |
| Amidase signature (AS) enzymes | Glutathione synthetase ATP-binding domain-like | 4 | 1 |  |
| GAD domain-like | GatB/YqeY motif | 4 | 1 |  |
| Complement control module/SCR domain | 4 | 1 |  |
| Chaperone J-domain | CSL zinc finger | 4 | 1 |  |
| Probable ACP-binding domain of malonyl-CoA ACP transacylase | ACP-like | 4 | 1 |  |
| F-box domain | Galactose-binding domain-like | 4 | 2 |  |
| FF domain | FF domain | 4 | 1 |  |
| PhoU-like | TrkA C-terminal domain-like | 4 | 1 |  |
| Amidase signature (AS) enzymes | Rudiment single hybrid motif | 4 | 1 |  |
| Agglutinin | Agglutinin | 4 | 1 |  |
| Cystatin/monellin | Cysteine proteinases | 4 | 1 |  |
| PK C-terminal domain-like | 4 | 1 |  |
| Homeodomain-like | NagB/RpiA/CoA transferase-like | 4 | 1 |  |
| F1F0 ATP synthase subunit B, membrane domain | V-type ATPase subunit E-like | 4 | 1 |  |
| Cell-division inhibitor MinC, N-terminal domain | Cell-division inhibitor MinC, C-terminal domain | 4 | 1 |  |
| Starch-binding domain-like | Starch-binding domain-like | 4 | 2 |  |
| IHF-like DNA-binding proteins | TraM-like | 4 | 1 |  |
| CBS-domain pair | Hypothetical protein Ta0289 C-terminal domain | 4 | 1 |  |
| MxiH-like | IpaD-like | 4 | 1 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | GroES-like | 4 | 1 |  |
| PYP-like sensor domain (PAS domain) | Voltage-gated potassium channels | 4 | 2 |  |
| POZ domain | Kelch motif | 4 | 1 |  |
| DAK1/DegV-like | DhaL-like | 4 | 1 |  |
| Homodimeric domain of signal transducing histidine kinase | CheW-like | 4 | 1 |  |
| (Trans)glycosidases | Six-hairpin glycosidases | 4 | 1 |  |
| Bacterial adhesins | Hypothetical protein PA1324 | 4 | 1 |  |
| Carbohydrate-binding domain | Carbohydrate-binding domain | 4 | 1 |  |
| Carbohydrate-binding domain | Carbohydrate-binding domain | 4 | 1 |  |
| Bacterial luciferase-like | Bacterial luciferase-like | 4 | 1 |  |
| FabD/lysophospholipase-like | alpha/beta-Hydrolases | 4 | 1 |  |
| RuvA domain 2-like | BRCT domain | 4 | 1 |  |
| Tetrahydrobiopterin biosynthesis enzymes-like | 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase, HPPK | 4 | 1 |  |
| GroEL equatorial domain-like | GroEL apical domain-like | 4 | 2 |  |
| Amidase signature (AS) enzymes | PreATP-grasp domain | 4 | 1 |  |
| HprK N-terminal domain-like | CBS-domain pair | 4 | 1 |  |
| alpha/beta knot | Nucleic acid-binding proteins | 4 | 2 |  |
| Family A G protein-coupled receptor-like | Flavoproteins | 4 | 1 |  |
| Ubiquitin-like | Kelch motif | 4 | 1 |  |
| L,D-transpeptidase catalytic domain-like | NTF2-like | 4 | 1 |  |
| Chaperone J-domain | T-antigen specific domain-like | 4 | 1 |  |
| Protein kinase-like (PK-like) | TPR-like | 4 | 2 |  |
| HBS1-like domain | Translation proteins | 4 | 1 |  |
| Voltage-gated potassium channels | GFP-like | 4 | 1 |  |
| PMT central region-like | Cysteine proteinases | 4 | 1 |  |
| Ankyrin repeat | SOCS box-like | 4 | 1 |  |
| Concanavalin A-like lectins/glucanases | AbfB domain | 4 | 1 |  |
| Probable ACP-binding domain of malonyl-CoA ACP transacylase | GroES-like | 4 | 1 |  |
| Sec7 domain | RalF, C-terminal domain | 4 | 3 |  |
| Sec7 domain | RalF, C-terminal domain | 4 | 1 |  |
| Isochorismatase-like hydrolases | 4 | 1 |  |
| Peridinin-chlorophyll protein | Peridinin-chlorophyll protein | 4 | 1 |  |
| Peridinin-chlorophyll protein | Peridinin-chlorophyll protein | 4 | 1 |  |
| GatD N-terminal domain-like | Glutaminase/Asparaginase | 4 | 1 |  |
| Periplasmic binding protein-like II | Ankyrin repeat | 4 | 1 |  |
| Carbohydrate-binding domain | E set domains | 4 | 1 |  |
| Putative DNA-binding domain | Translation proteins | 4 | 1 |  |
| Zinc beta-ribbon | TATA-box binding protein-like | 4 | 1 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | alpha/beta-Hydrolases | 4 | 1 |  |
| (Trans)glycosidases | Anthrax protective antigen | 4 | 2 |  |
| Acetamidase/Formamidase-like | 4 | 1 |  |
| Ribosome inactivating proteins (RIP) | 4 | 2 |  |
| 4-helical cytokines | 4-helical cytokines | 4 | 1 |  |
| HAMP domain-like | ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | 4 | 1 |  |
| beta-N-acetylhexosaminidase-like domain | E set domains | 4 | 1 |  |
| Class II aaRS ABD-related | 4 | 1 |  |
| Quinoprotein alcohol dehydrogenase-like | Calcium-dependent phosphotriesterase | 4 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | HRDC-like | 4 | 1 |  |
| RNase A-like | RNase A-like | 4 | 1 |  |
| Ribbon-helix-helix | Replication modulator SeqA, C-terminal DNA-binding domain | 4 | 1 |  |
| FabD/lysophospholipase-like | GroES-like | 4 | 1 |  |
| Homo-oligomeric flavin-containing Cys decarboxylases, HFCD | Bacterial immunoglobulin/albumin-binding domains | 4 | 1 |  |
| EreA/ChaN-like | Cysteine proteinases | 4 | 1 |  |
| Probable ACP-binding domain of malonyl-CoA ACP transacylase | NAD(P)-binding Rossmann-fold domains | 4 | 1 |  |
| Probable ACP-binding domain of malonyl-CoA ACP transacylase | alpha/beta-Hydrolases | 4 | 1 |  |
| HMA, heavy metal-associated domain | Calcium ATPase, transduction domain A | 4 | 2 |  |
| Glyoxalase/Bleomycin resistance protein/Dihydroxybiphenyl dioxygenase | Phosphofructokinase | 4 | 1 |  |
| MoaD/ThiS | MoaD-related protein, C-terminal domain | 4 | 1 |  |
| FabD/lysophospholipase-like | S-adenosyl-L-methionine-dependent methyltransferases | 4 | 1 |  |
| Thiolase-like | S-adenosyl-L-methionine-dependent methyltransferases | 4 | 1 |  |
| XRCC4, C-terminal oligomerization domain | 4 | 1 |  |
| Myosin rod fragments | Tropomyosin | 4 | 1 |  |
| SH3-domain | S-adenosyl-L-methionine-dependent methyltransferases | 4 | 1 |  |
| PYP-like sensor domain (PAS domain) | P-loop containing nucleoside triphosphate hydrolases | 4 | 2 |  |
| HMA, heavy metal-associated domain | HAD-like | 4 | 2 |  |
| Cloacin translocation domain | His-Me finger endonucleases | 4 | 1 |  |
| Creatinase/aminopeptidase | 4 | 1 |  |
| Immunoglobulin-binding domains | Periplasmic binding protein-like II | 4 | 1 |  |
| BAR/IMD domain-like | SH3-domain | 4 | 2 |  |
| BRCA2 helical domain | BRCA2 tower domain | 4 | 2 |  |
| Complement control module/SCR domain | Immunoglobulin | 4 | 2 |  |
| Putative DNA-binding domain | Initiation factor IF2/eIF5b, domain 3 | 4 | 1 |  |
| E set domains | NHL repeat | 4 | 1 |  |
| FMN-linked oxidoreductases | 4 | 1 |  |
| Arabinanase/levansucrase/invertase | AbfB domain | 4 | 1 |  |
| Homeodomain-like | p53-like transcription factors | 4 | 1 |  |
| PUA domain-like | alpha/beta knot | 4 | 2 |  |
| Amidase signature (AS) enzymes | PH0987 N-terminal domain-like | 4 | 1 |  |
| Phase 1 flagellin | Phase 1 flagellin | 4 | 1 |  |
| Pre-protein crosslinking domain of SecA | Sec-C motif | 4 | 2 |  |
| Kazal-type serine protease inhibitors | Trypsin-like serine proteases | 4 | 1 |  |
| HAD-like | BRCT domain | 4 | 1 |  |
| Photosystem II antenna protein-like | Photosystem II antenna protein-like | 4 | 1 |  |
| Chromo domain-like | Ribonuclease H-like | 4 | 1 |  |
| Ankyrin repeat | Histidine-containing phosphotransfer domain, HPT domain | 4 | 1 |  |
| Thioredoxin-like | Nqo1C-terminal domain-like | 4 | 1 |  |
| Thiolase-like | GroES-like | 4 | 1 |  |
| Trypsin-like serine proteases | 4 | 1 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | ACP-like | 4 | 1 |  |
| Carbohydrate-binding domain | (Trans)glycosidases | 4 | 1 |  |
| NHL repeat | Calcium-dependent phosphotriesterase | 4 | 1 |  |
| Translation proteins SH3-like domain | Translation proteins SH3-like domain | 4 | 1 |  |
| all-alpha NTP pyrophosphatases | all-alpha NTP pyrophosphatases | 4 | 1 |  |
| Periplasmic binding protein-like II | LexA/Signal peptidase | 4 | 1 |  |
| PYP-like sensor domain (PAS domain) | cAMP-binding domain-like | 4 | 2 |  |
| Calponin-homology domain, CH-domain | Spectrin repeat | 4 | 2 |  |
| Head morphogenesis protein gp7 | Tropomyosin | 4 | 1 |  |
| Carbohydrate-binding domain | beta-N-acetylhexosaminidase-like domain | 4 | 1 |  |
| Microbial ribonucleases | Microbial ribonucleases | 4 | 1 |  |
| RNA-binding domain, RBD | Nucleotidyltransferase | 4 | 1 |  |
| Myosin S1 fragment, N-terminal domain | P-loop containing nucleoside triphosphate hydrolases | 4 | 1 |  |
| Thioredoxin-like | Nqo1 middle domain-like | 4 | 1 |  |
| Ribonuclease H-like | Nucleic acid-binding proteins | 4 | 2 |  |
| Composite domain of metallo-dependent hydrolases | 4 | 1 |  |
| Quinohemoprotein amine dehydrogenase A chain, domain 3 | E set domains | 4 | 1 |  |
| Thioredoxin-like | Arabinanase/levansucrase/invertase | 4 | 1 |  |
| Thioredoxin-like | Nqo1 FMN-binding domain-like | 4 | 1 |  |
| C-type lectin-like | Complement control module/SCR domain | 4 | 1 |  |
| Cytidine deaminase-like | THUMP domain-like | 4 | 1 |  |
| Chromo domain-like | N-terminal Zn binding domain of HIV integrase | 4 | 1 |  |
| Six-hairpin glycosidases | Type I dockerin domain | 4 | 2 |  |
| Sialidases | 4 | 1 |  |
| Cytochrome c | Quinohemoprotein amine dehydrogenase A chain, domain 3 | 4 | 1 |  |
| ArfGap/RecO-like zinc finger | P-loop containing nucleoside triphosphate hydrolases | 4 | 2 |  |
| GAT-like domain | SNARE fusion complex | 3 | 1 |  |
| Subtilisin-like | Galactose-binding domain-like | 3 | 1 |  |
| 5' to 3' exonuclease, C-terminal subdomain | Ribonuclease H-like | 3 | 1 |  |
| Ubiquitin-like | DNA clamp | 3 | 1 |  |
| Oligoxyloglucan reducing end-specific cellobiohydrolase | PKD domain | 3 | 1 |  |
| VP4 membrane interaction domain | 3 | 1 |  |
| ACT-like | CheY-like | 3 | 1 |  |
| CheY-like | 3 | 2 |  |
| PYP-like sensor domain (PAS domain) | EAL domain-like | 3 | 1 |  |
| Concanavalin A-like lectins/glucanases | TRAF domain-like | 3 | 1 |  |
| PA2201 N-terminal domain-like | PA2201 C-terminal domain-like | 3 | 1 |  |
| TPR-like | SMAD/FHA domain | 3 | 1 |  |
| Pectin lyase-like | 3 | 1 |  |
| Kringle-like | Hemopexin-like domain | 3 | 1 |  |
| ADP-ribosylation | Ricin B-like lectins | 3 | 1 |  |
| (Phosphotyrosine protein) phosphatases II | E set domains | 3 | 1 |  |
| Bet v1-like | 3 | 1 |  |
| vWA-like | 3 | 2 |  |
| LDL receptor-like module | Complement control module/SCR domain | 3 | 1 |  |
| E set domains | Hyaluronate lyase-like, C-terminal domain | 3 | 1 |  |
| Trimeric LpxA-like enzymes | NTF2-like | 3 | 1 |  |
| Homeodomain-like | 3 | 1 |  |
| Bet v1-like | Bet v1-like | 3 | 1 |  |
| PAZ domain | dsRNA-binding domain-like | 3 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | PAZ domain | 3 | 1 |  |
| dsRNA-binding domain-like | 3 | 1 |  |
| Helical scaffold and wing domains of SecA | Sec-C motif | 3 | 1 |  |
| GST C-terminal domain-like | GST C-terminal domain-like | 3 | 1 |  |
| C-terminal effector domain of the bipartite response regulators | TPR-like | 3 | 1 |  |
| MesJ substrate recognition domain-like | PheT/TilS domain | 3 | 1 |  |
| E set domains | YWTD domain | 3 | 1 |  |
| Flavoproteins | Rubredoxin-like | 3 | 1 |  |
| PIN domain-like | Ribonuclease H-like | 3 | 1 |  |
| C-terminal effector domain of the bipartite response regulators | SMAD/FHA domain | 3 | 1 |  |
| "Winged helix" DNA-binding domain | Riboflavin kinase-like | 3 | 1 |  |
| TSP-1 type 1 repeat | Complement control module/SCR domain | 3 | 1 |  |
| GLA-domain | Growth factor receptor domain | 3 | 1 |  |
| EF-Tu/eEF-1alpha/eIF2-gamma C-terminal domain | "Winged helix" DNA-binding domain | 3 | 1 |  |
| Concanavalin A-like lectins/glucanases | VP4 membrane interaction domain | 3 | 1 |  |
| Quinoprotein alcohol dehydrogenase-like | DPP6 N-terminal domain-like | 3 | 1 |  |
| Periplasmic binding protein-like II | Fibronectin type III | 3 | 1 |  |
| SH2 domain | GTPase activation domain, GAP | 3 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | Sec-C motif | 3 | 1 |  |
| Phase 1 flagellin | Flagellar export chaperone FliS | 3 | 2 |  |
| Subunit IX of photosystem I reaction centre, PsaJ | Subunit III of photosystem I reaction centre, PsaF | 3 | 1 |  |
| HCP-like | TPR-like | 3 | 1 |  |
| Rab geranylgeranyltransferase alpha-subunit, insert domain | L domain-like | 3 | 1 |  |
| Periplasmic binding protein-like II | PAZ domain | 3 | 1 |  |
| Mib/herc2 domain-like | Mib/herc2 domain-like | 3 | 1 |  |
| Protein prenylyltransferase | Protein prenylyltransferase | 3 | 1 |  |
| Duffy binding domain-like | 3 | 1 |  |
| Periplasmic binding protein-like II | beta-lactamase/transpeptidase-like | 3 | 1 |  |
| Spectrin repeat | EF-hand | 3 | 1 |  |
| Mannose 6-phosphate receptor domain | Kringle-like | 3 | 2 |  |
| Homeodomain-like | GFP-like | 3 | 1 |  |
| Quinoprotein alcohol dehydrogenase-like | Cytochrome c | 3 | 1 |  |
| Galactose-binding domain-like | Hyaluronate lyase-like, C-terminal domain | 3 | 2 |  |
| Zinc beta-ribbon | DNA primase core | 3 | 1 |  |
| Growth factor receptor domain | Trypsin-like serine proteases | 3 | 1 |  |
| Uracil-DNA glycosylase-like | PUA domain-like | 3 | 1 |  |
| Immunoglobulin-binding domains | RNA-binding domain, RBD | 3 | 1 |  |
| BT0923-like | BT0923-like | 3 | 1 |  |
| Arabinanase/levansucrase/invertase | Arabinanase/levansucrase/invertase | 3 | 2 |  |
| Carboxypeptidase regulatory domain-like | Porins | 3 | 1 |  |
| ARM repeat | GUN4-like | 3 | 1 |  |
| C-terminal domain of adenylylcyclase associated protein | Nucleoside diphosphate kinase, NDK | 3 | 1 |  |
| C-terminal domain of adenylylcyclase associated protein | Nucleoside diphosphate kinase, NDK | 3 | 2 |  |
| F-box domain | Galactose-binding domain-like | 3 | 1 |  |
| YegP-like | YegP-like | 3 | 1 |  |
| FMN-dependent nitroreductase-like | 3 | 2 |  |
| SNARE-like | P-loop containing nucleoside triphosphate hydrolases | 3 | 1 |  |
| Metallo-hydrolase/oxidoreductase | Metallo-hydrolase/oxidoreductase | 3 | 2 |  |
| Adhesin YadA, collagen-binding domain | Pili subunits | 3 | 1 |  |
| Adenine nucleotide alpha hydrolases-like | PheT/TilS domain | 3 | 1 |  |
| Ribonuclease H-like | RNA-binding domain, RBD | 3 | 2 |  |
| CBD9-like | FAD-linked reductases, C-terminal domain | 3 | 1 |  |
| Thioredoxin-like | TPR-like | 3 | 1 |  |
| Immunoglobulin | TSP-1 type 1 repeat | 3 | 2 |  |
| ARM repeat | RING/U-box | 3 | 1 |  |
| Calponin-homology domain, CH-domain | EF-hand | 3 | 1 |  |
| Cysteine-rich domain | C2 domain (Calcium/lipid-binding domain, CaLB) | 3 | 2 |  |
| Mib/herc2 domain-like | RING/U-box | 3 | 1 |  |
| GTPase activation domain, GAP | P-loop containing nucleoside triphosphate hydrolases | 3 | 2 |  |
| Midkine | Midkine | 3 | 1 |  |
| Cysteine proteinases | UBA-like | 3 | 2 |  |
| Nucleic acid-binding proteins | PHP domain-like | 3 | 1 |  |
| SAICAR synthase-like | N5-CAIR mutase (phosphoribosylaminoimidazole carboxylase, PurE) | 3 | 1 |  |
| ENTH/VHS domain | FYVE/PHD zinc finger | 3 | 1 |  |
| Metalloproteases ("zincins"), catalytic domain | TRAF domain-like | 3 | 1 |  |
| Metallo-hydrolase/oxidoreductase | Rubredoxin-like | 3 | 1 |  |
| Ada DNA repair protein, N-terminal domain (N-Ada 10) | Homeodomain-like | 3 | 1 |  |
| SNARE-like | Domain of the SRP/SRP receptor G-proteins | 3 | 1 |  |
| GFP-like | Immunoglobulin | 3 | 1 |  |
| OMPA-like | OmpA-like | 3 | 1 |  |
| Surface presentation of antigens (SPOA) | Surface presentation of antigens (SPOA) | 3 | 1 |  |
| RNase III domain-like | 3 | 1 |  |
| Chromo domain-like | Ankyrin repeat | 3 | 2 |  |
| Nucleic acid-binding proteins | TPR-like | 3 | 2 |  |
| Glutamine synthetase/guanido kinase | Glutathione synthetase ATP-binding domain-like | 3 | 1 |  |
| Cytochromes | GFP-like | 3 | 1 |  |
| Protein prenylyltransferase | Rab geranylgeranyltransferase alpha-subunit, insert domain | 3 | 1 |  |
| Hedgehog/intein (Hint) domain | Hedgehog/intein (Hint) domain | 3 | 1 |  |
| Creatinase/aminopeptidase | Creatinase/aminopeptidase | 3 | 1 |  |
| Protein prenylyltransferase | L domain-like | 3 | 1 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | Macro domain-like | 3 | 1 |  |
| Periplasmic binding protein-like II | Bactericidal permeability-increasing protein, BPI | 3 | 1 |  |
| Fibre shaft of virus attachment proteins | Fibre shaft of virus attachment proteins | 3 | 1 |  |
| SRCR-like | SRCR-like | 3 | 2 |  |
| WD40 repeat-like | Nucleoporin domain | 3 | 1 |  |
| ENTH/VHS domain | SNARE fusion complex | 3 | 1 |  |
| Ferritin-like | Major capsid protein gp5 | 3 | 1 |  |
| MFPT repeat-like | MFPT repeat-like | 3 | 1 |  |
| CheY-like | Ornithine decarboxylase C-terminal domain | 3 | 1 |  |
| Nucleic acid-binding proteins | AF1531-like | 3 | 1 |  |
| Carbohydrate-binding domain | E set domains | 3 | 3 |  |
| PIN domain-like | DNA/RNA polymerases | 3 | 1 |  |
| Protein kinase-like (PK-like) | Immunoglobulin | 3 | 2 |  |
| Bactericidal permeability-increasing protein, BPI | Bactericidal permeability-increasing protein, BPI | 3 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Ankyrin repeat | 3 | 2 |  |
| Protein prenylyltransferase | HCP-like | 3 | 1 |  |
| Plant lectins/antimicrobial peptides | Lysozyme-like | 3 | 1 |  |
| Class I glutamine amidotransferase-like | Methylglyoxal synthase-like | 3 | 2 |  |
| RNase III domain-like | 3 | 1 |  |
| PGBD-like | L,D-transpeptidase catalytic domain-like | 3 | 2 |  |
| SWIB/MDM2 domain | eIF1-like | 3 | 2 |  |
| Second domain of FERM | Protein kinase-like (PK-like) | 3 | 1 |  |
| Immunoglobulin-binding domains | DEATH domain | 3 | 2 |  |
| TolB, N-terminal domain | Tricorn protease N-terminal domain | 3 | 1 |  |
| Cyclophilin-like | TPR-like | 3 | 1 |  |
| Surp module (SWAP domain) | Ubiquitin-like | 3 | 1 |  |
| Periplasmic binding protein-like II | Homeodomain-like | 3 | 2 |  |
| RING/U-box | Homeodomain-like | 3 | 1 |  |
| WD40 repeat-like | YVTN repeat-like/Quinoprotein amine dehydrogenase | 3 | 2 |  |
| P-loop containing nucleoside triphosphate hydrolases | vWA-like | 3 | 2 |  |
| NTF2-like | NTF2-like | 3 | 1 |  |
| Aquaporin-like | 3 | 1 |  |
| Spermadhesin, CUB domain | Complement control module/SCR domain | 3 | 3 |  |
| dsRNA-binding domain-like | 3 | 2 |  |
| YhbC-like, N-terminal domain | YhbC-like, C-terminal domain | 3 | 1 |  |
| Pre-protein crosslinking domain of SecA | Sec-C motif | 3 | 1 |  |
| Photosystem II antenna protein-like | Photosystem II antenna protein-like | 3 | 2 |  |
| Calcium ATPase, transduction domain A | Calcium ATPase, transmembrane domain M | 3 | 1 |  |
| PAZ domain | 3 | 1 |  |
| BAH domain | P-loop containing nucleoside triphosphate hydrolases | 3 | 1 |  |
| lambda repressor-like DNA-binding domains | SinR repressor dimerisation domain-like | 3 | 1 |  |
| "Winged helix" DNA-binding domain | Class II aaRS and biotin synthetases | 3 | 1 |  |
| Prokaryotic type I DNA topoisomerase | Zinc beta-ribbon | 3 | 2 |  |
| Acid proteases | Saposin | 3 | 1 |  |
| CBD9-like | FAD/NAD(P)-binding domain | 3 | 1 |  |
| Periplasmic binding protein-like II | Tudor/PWWP/MBT | 3 | 1 |  |
| Defensin-like | Defensin-like | 3 | 1 |  |
| GFP-like | Periplasmic binding protein-like II | 3 | 2 |  |
| Ankyrin repeat | Second domain of FERM | 3 | 1 |  |
| Retroviral matrix proteins | Retrovirus capsid protein, N-terminal core domain | 3 | 2 |  |
| E set domains | Type I dockerin domain | 3 | 1 |  |
| Concanavalin A-like lectins/glucanases | P-domain of calnexin/calreticulin | 3 | 2 |  |
| CBD9-like | Cellulose-binding domain | 3 | 1 |  |
| GLA-domain | Kringle-like | 3 | 2 |  |
| 5' to 3' exonuclease, C-terminal subdomain | DNA/RNA polymerases | 3 | 1 |  |
| Metallo-dependent phosphatases | Formin homology 2 domain (FH2 domain) | 3 | 1 |  |
| EGF/Laminin | Immunoglobulin | 3 | 2 |  |
| CheY-like | PLP-dependent transferases | 3 | 1 |  |
| E set domains | Chondroitin AC/alginate lyase | 3 | 1 |  |
| Galactose-binding domain-like | Chondroitin AC/alginate lyase | 3 | 2 |  |
| Homeodomain-like | SIS domain | 2 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Acyl-CoA N-acyltransferases (Nat) | 2 | 1 |  |
| RNA-binding domain, RBD | NTF2-like | 2 | 1 |  |
| WW domain | Periplasmic binding protein-like II | 2 | 1 |  |
| C2 domain (Calcium/lipid-binding domain, CaLB) | GTPase activation domain, GAP | 2 | 1 |  |
| Calponin-homology domain, CH-domain | EB1 dimerisation domain-like | 2 | 1 |  |
| FMN-binding split barrel | "Winged helix" DNA-binding domain | 2 | 1 |  |
| Periplasmic binding protein-like II | AFP III-like domain | 2 | 1 |  |
| MIR domain | 2 | 1 |  |
| Sec7 domain | P-loop containing nucleoside triphosphate hydrolases | 2 | 1 |  |
| PX domain | SH3-domain | 2 | 1 |  |
| Leucine zipper domain | GTPase activation domain, GAP | 2 | 1 |  |
| GMP synthetase C-terminal dimerisation domain | GMP synthetase C-terminal dimerisation domain | 2 | 1 |  |
| L domain-like | Toll/Interleukin receptor TIR domain | 2 | 1 |  |
| Periplasmic binding protein-like II | Pre-protein crosslinking domain of SecA | 2 | 1 |  |
| Ribonuclease H-like | Zinc finger domain of DNA polymerase-alpha | 2 | 1 |  |
| Microbial ribonucleases | Plant inhibitors of proteinases and amylases | 2 | 1 |  |
| SPOC domain-like | SAP domain | 2 | 1 |  |
| lambda repressor-like DNA-binding domains | Tetracyclin repressor-like, C-terminal domain | 2 | 1 |  |
| Nucleic acid-binding proteins | Metallo-dependent phosphatases | 2 | 1 |  |
| (Trans)glycosidases | SH3-domain | 2 | 1 |  |
| Prokaryotic SH3-related domain | Prokaryotic SH3-related domain | 2 | 2 |  |
| PLC-like phosphodiesterases | C-terminal domain of PLC-beta | 2 | 1 |  |
| Periplasmic binding protein-like II | Virus ectodomain | 2 | 1 |  |
| FAD/NAD(P)-binding domain | Calponin-homology domain, CH-domain | 2 | 1 |  |
| PH domain-like | C-terminal domain of PLC-beta | 2 | 1 |  |
| HMA, heavy metal-associated domain | Metal cation-transporting ATPase, ATP-binding domain N | 2 | 1 |  |
| XRCC4, N-terminal domain | Head morphogenesis protein gp7 | 2 | 1 |  |
| Ubiquitin-like | Cysteine proteinases | 2 | 1 |  |
| EGF/Laminin | Kringle-like | 2 | 1 |  |
| EGF/Laminin | TSP type-3 repeat | 2 | 1 |  |
| R1 subunit of ribonucleotide reductase, N-terminal domain | 2 | 1 |  |
| Inhibitor of apoptosis (IAP) repeat | RNI-like | 2 | 1 |  |
| UBA-like | DNase I-like | 2 | 1 |  |
| Aconitase B, N-terminal domain | Aconitase iron-sulfur domain | 2 | 1 |  |
| Copper amine oxidase, domain N | Amine oxidase catalytic domain | 2 | 1 |  |
| Sialidases | Oligoxyloglucan reducing end-specific cellobiohydrolase | 2 | 1 |  |
| Rad51 N-terminal domain-like | Rad51 N-terminal domain-like | 2 | 1 |  |
| Homeodomain-like | Ribonuclease H-like | 2 | 1 |  |
| Cellulose docking domain, dockering | Cellulose docking domain, dockering | 2 | 1 |  |
| Phospholipase D/nuclease | TrmB C-terminal domain-like | 2 | 2 |  |
| Class II aaRS ABD-related | Class II aaRS ABD-related | 2 | 1 |  |
| SH3-domain | CAD & PB1 domains | 2 | 1 |  |
| Dimeric alpha+beta barrel | 2 | 1 |  |
| Protein kinase-like (PK-like) | WD40 repeat-like | 2 | 2 |  |
| Ribokinase-like | Heme oxygenase-like | 2 | 1 |  |
| "Winged helix" DNA-binding domain | Regulator of G-protein signaling, RGS | 2 | 1 |  |
| Ribosome inactivating proteins (RIP) | Ricin B-like lectins | 2 | 1 |  |
| RING/U-box | Concanavalin A-like lectins/glucanases | 2 | 1 |  |
| NusB-like | S-adenosyl-L-methionine-dependent methyltransferases | 2 | 1 |  |
| Bacterial immunoglobulin/albumin-binding domains | ARM repeat | 2 | 1 |  |
| Head-binding domain of phage P22 tailspike protein | Leucine zipper domain | 2 | 1 |  |
| RING/U-box | WWE domain | 2 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Lysozyme-like | 2 | 1 |  |
| B-box zinc-binding domain | Lysozyme-like | 2 | 1 |  |
| YrdC/RibB | RibA-like | 2 | 1 |  |
| RING/U-box | UBC-like | 2 | 1 |  |
| Cloacin translocation domain | Colicin D/E5 nuclease domain | 2 | 1 |  |
| HMA, heavy metal-associated domain | HMA, heavy metal-associated domain | 2 | 1 |  |
| Restriction endonuclease-like | S-adenosyl-L-methionine-dependent methyltransferases | 2 | 1 |  |
| Ubiquitin-like | PP2C-like | 2 | 1 |  |
| Double Clp-N motif | GFP-like | 2 | 1 |  |
| Cellulose-binding domain | (Trans)glycosidases | 2 | 1 |  |
| Bacterial immunoglobulin/albumin-binding domains | Lysozyme-like | 2 | 1 |  |
| AFP III-like domain | AFP III-like domain | 2 | 1 |  |
| CBS-domain pair | ACT-like | 2 | 1 |  |
| Cytochrome c oxidase subunit I-like | Cytochrome c oxidase subunit III-like | 2 | 1 |  |
| Serine protease inhibitors | FnI-like domain | 2 | 1 |  |
| Retroviral matrix proteins | Retrovirus zinc finger-like domains | 2 | 1 |  |
| FliG | 2 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | CarD-like | 2 | 1 |  |
| Quinoprotein alcohol dehydrogenase-like | TolB, C-terminal domain | 2 | 1 |  |
| Periplasmic binding protein-like II | Arginase/deacetylase | 2 | 1 |  |
| 2Fe-2S ferredoxin-like | Actin-like ATPase domain | 2 | 1 |  |
| Ribosome inactivating proteins (RIP) | Ribosome inactivating proteins (RIP) | 2 | 1 |  |
| Homodimeric domain of signal transducing histidine kinase | 2 | 1 |  |
| CCHHC domain | CCHHC domain | 2 | 1 |  |
| Calponin-homology domain, CH-domain | E set domains | 2 | 1 |  |
| DNA-binding pseudobarrel domain | Restriction endonuclease-like | 2 | 1 |  |
| "Winged helix" DNA-binding domain | Rv2827c C-terminal domain-like | 2 | 1 |  |
| SpoIIaa-like | 2 | 1 |  |
| BSD domain-like | BSD domain-like | 2 | 1 |  |
| "Winged helix" DNA-binding domain | Ras GEF | 2 | 1 |  |
| Beta-D-glucan exohydrolase, C-terminal domain | Beta-D-glucan exohydrolase, C-terminal domain | 2 | 1 |  |
| Carbon-nitrogen hydrolase | HIT-like | 2 | 1 |  |
| Transcription factor STAT-4 N-domain | SH2 domain | 2 | 1 |  |
| SAM/Pointed domain | Lysozyme-like | 2 | 1 |  |
| Six-hairpin glycosidases | CBD9-like | 2 | 1 |  |
| IHF-like DNA-binding proteins | IHF-like DNA-binding proteins | 2 | 1 |  |
| CbiG N-terminal domain-like | CobE/GbiG C-terminal domain-like | 2 | 1 |  |
| Transcription factor STAT-4 N-domain | p53-like transcription factors | 2 | 1 |  |
| Protein kinase-like (PK-like) | UBA-like | 2 | 1 |  |
| RAP domain-like | RAP domain-like | 2 | 1 |  |
| Galactose-binding domain-like | Agglutinin HPA-like | 2 | 1 |  |
| UROD/MetE-like | 2 | 1 |  |
| ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | 2 | 1 |  |
| Retroviral matrix proteins | Retrovirus capsid dimerization domain-like | 2 | 1 |  |
| Acid phosphatase/Vanadium-dependent haloperoxidase | Acid phosphatase/Vanadium-dependent haloperoxidase | 2 | 1 |  |
| FAD-binding/transporter-associated domain-like | FAD-binding/transporter-associated domain-like | 2 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | DNA/RNA polymerases | 2 | 1 |  |
| Homeodomain-like | mu transposase, C-terminal domain | 2 | 1 |  |
| Heme-dependent catalase-like | Lipase/lipooxygenase domain (PLAT/LH2 domain) | 2 | 1 |  |
| SH2 domain | Cysteine-rich domain | 2 | 1 |  |
| DHS-like NAD/FAD-binding domain | 2 | 1 |  |
| CAD & PB1 domains | 2 | 1 |  |
| Apolipoprotein A-I | Apolipoprotein A-I | 2 | 1 |  |
| PurM C-terminal domain-like | 2 | 1 |  |
| CarD-like | TRCF domain-like | 2 | 1 |  |
| Single hybrid motif | FAD/NAD-linked reductases, dimerisation (C-terminal) domain | 2 | 1 |  |
| cAMP-binding domain-like | 2 | 1 |  |
| Trypsin-like serine proteases | EGF/Laminin | 2 | 2 |  |
| PTS-regulatory domain, PRD | PTS-regulatory domain, PRD | 2 | 1 |  |
| PDZ domain-like | Fibronectin type III | 2 | 1 |  |
| CheY-like | Ribulose-phoshate binding barrel | 2 | 1 |  |
| B-box zinc-binding domain | Concanavalin A-like lectins/glucanases | 2 | 1 |  |
| Nucleotide-diphospho-sugar transferases | IpsF-like | 2 | 1 |  |
| PFL-like glycyl radical enzymes | 2 | 1 |  |
| Periplasmic binding protein-like II | ACP-like | 2 | 1 |  |
| gamma-Crystallin-like | gamma-Crystallin-like | 2 | 1 |  |
| C2 domain (Calcium/lipid-binding domain, CaLB) | C-terminal domain of PLC-beta | 2 | 1 |  |
| PR-1-like | PR-1-like | 2 | 1 |  |
| FKBP-like | EF-hand | 2 | 1 |  |
| beta-beta-alpha zinc fingers | Leucine zipper domain | 2 | 1 |  |
| FAD/NAD-linked reductases, dimerisation (C-terminal) domain | 2 | 1 |  |
| Ubiquitin-like | UBA-like | 2 | 1 |  |
| "Winged helix" DNA-binding domain | Transducin (heterotrimeric G protein), gamma chain | 2 | 1 |  |
| Periplasmic binding protein-like II | Concanavalin A-like lectins/glucanases | 2 | 1 |  |
| Dihydrofolate reductase-like | Dihydrofolate reductase-like | 2 | 1 |  |
| Chaperone J-domain | Protein kinase-like (PK-like) | 2 | 1 |  |
| Cna protein B-type domain | vWA-like | 2 | 2 |  |
| Topoisomerase V catalytic domain-like | Rad51 N-terminal domain-like | 2 | 2 |  |
| Arabinanase/levansucrase/invertase | Arabinanase/levansucrase/invertase | 2 | 2 |  |
| Tex N-terminal region-like | SH2 domain | 2 | 2 |  |
| Ubiquitin-like | XPC-binding domain | 2 | 1 |  |
| lambda repressor-like DNA-binding domains | LexA/Signal peptidase | 2 | 1 |  |
| Periplasmic binding protein-like II | ClpS-like | 2 | 1 |  |
| Histone-fold | PH domain-like | 2 | 2 |  |
| PH domain-like | PDZ domain-like | 2 | 2 |  |
| Ubiquitin-like | WD40 repeat-like | 2 | 1 |  |
| CHY zinc finger-like | Zinc hairpin stack | 2 | 1 |  |
| SGNH hydrolase | Autotransporter | 2 | 1 |  |
| Leucine zipper domain | Ubiquitin-like | 2 | 1 |  |
| YegP-like | YegP-like | 2 | 1 |  |
| beta-carbonic anhydrase, cab | beta-carbonic anhydrase, cab | 2 | 1 |  |
| beta-carbonic anhydrase, cab | beta-carbonic anhydrase, cab | 2 | 1 |  |
| Influenza hemagglutinin (stalk) | Influenza hemagglutinin (stalk) | 2 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | TRCF domain-like | 2 | 1 |  |
| PKD domain | Galactose-binding domain-like | 2 | 1 |  |
| Cell-division inhibitor MinC, N-terminal domain | Cell-division inhibitor MinC, C-terminal domain | 2 | 1 |  |
| Periplasmic binding protein-like II | 4'-phosphopantetheinyl transferase | 2 | 1 |  |
| Second domain of FERM | SH3-domain | 2 | 1 |  |
| Cystine-knot cytokines | Heparin-binding domain from vascular endothelial growth factor | 2 | 1 |  |
| Ubiquitin-like | SH3-domain | 2 | 1 |  |
| DNA/RNA polymerases | Zinc finger domain of DNA polymerase-alpha | 2 | 1 |  |
| CheY-like | Methylesterase CheB, C-terminal domain | 2 | 1 |  |
| Eea1 homodimerisation domain | FYVE/PHD zinc finger | 2 | 1 |  |
| Dimerization-anchoring domain of cAMP-dependent PK regulatory subunit | ARM repeat | 2 | 1 |  |
| "Winged helix" DNA-binding domain | Ubiquitin-like | 2 | 1 |  |
| RuvA domain 2-like | Rad51 N-terminal domain-like | 2 | 2 |  |
| Influenza hemagglutinin (stalk) | Virus ectodomain | 2 | 1 |  |
| WW domain | EF-hand | 2 | 1 |  |
| Cadherin-like | (Trans)glycosidases | 2 | 1 |  |
| Bacterial adhesins | Hypothetical protein PA1324 | 2 | 1 |  |
| Bacterial adhesins | Hypothetical protein PA1324 | 2 | 1 |  |
| YVTN repeat-like/Quinoprotein amine dehydrogenase | 2 | 1 |  |
| Lipovitellin-phosvitin complex; beta-sheet shell regions | Lipovitellin-phosvitin complex; beta-sheet shell regions | 2 | 1 |  |
| WW domain | 2 | 2 |  |
| EF-hand | Ubiquitin-like | 2 | 1 |  |
| "Winged helix" DNA-binding domain | DPP6 N-terminal domain-like | 2 | 1 |  |
| Tp47 lipoprotein, middle and C-terminal domains | Tp47 lipoprotein, middle and C-terminal domains | 2 | 1 |  |
| Annexin | Annexin | 2 | 1 |  |
| Trypsin-like serine proteases | DNA/RNA polymerases | 2 | 1 |  |
| Plant lectins/antimicrobial peptides | N-acetylmuramoyl-L-alanine amidase-like | 2 | 1 |  |
| Metallo-hydrolase/oxidoreductase | Rubredoxin-like | 2 | 1 |  |
| Heme-dependent catalase-like | Lipoxigenase | 2 | 1 |  |
| Viral protein domain | Virus ectodomain | 2 | 1 |  |
| Lysozyme-like | 2 | 2 |  |
| Pili subunits | GspK insert domain-like | 2 | 1 |  |
| EAL domain-like | 2 | 1 |  |
| CoA-dependent acyltransferases | Thiamin diphosphate-binding fold (THDP-binding) | 2 | 1 |  |
| Glucocorticoid receptor-like (DNA-binding domain) | Putative DNA-binding domain | 2 | 1 |  |
| Substrate-binding domain of HMG-CoA reductase | 2 | 1 |  |
| Sortase | 2 | 1 |  |
| Prokaryotic SH3-related domain | Cysteine proteinases | 2 | 1 |  |
| Aconitase B, N-terminal domain | LeuD/IlvD-like | 2 | 1 |  |
| Aldolase | FKBP-like | 2 | 1 |  |
| NagB/RpiA/CoA transferase-like | NagB/RpiA/CoA transferase-like | 2 | 1 |  |
| Creatinase/aminopeptidase | Creatinase/aminopeptidase | 2 | 1 |  |
| Sialidases | Six-hairpin glycosidases | 2 | 1 |  |
| Metallo-hydrolase/oxidoreductase | 2 | 1 |  |
| SMAD/FHA domain | 2 | 1 |  |
| SH3-domain | 2 | 1 |  |
| Concanavalin A-like lectins/glucanases | Ricin B-like lectins | 2 | 1 |  |
| SET domain | TAFH domain-like | 2 | 1 |  |
| beta and beta-prime subunits of DNA dependent RNA-polymerase | beta and beta-prime subunits of DNA dependent RNA-polymerase | 2 | 2 |  |
| (Trans)glycosidases | Cyclophilin-like | 2 | 1 |  |
| Soluble quinoprotein glucose dehydrogenase | WD40 repeat-like | 2 | 1 |  |
| Galactose-binding domain-like | Heparin-binding domain from vascular endothelial growth factor | 2 | 1 |  |
| R3H domain | RNA-binding domain, RBD | 2 | 1 |  |
| Cysteine-rich domain | GTPase activation domain, GAP | 2 | 1 |  |
| NE0471 N-terminal domain-like | lambda repressor-like DNA-binding domains | 2 | 1 |  |
| Soluble quinoprotein glucose dehydrogenase | EGF/Laminin | 2 | 1 |  |
| SH2 domain | Fibronectin type III | 2 | 1 |  |
| Class II aaRS and biotin synthetases | Class II aaRS and biotin synthetases | 2 | 1 |  |
| BAG domain | BAG domain | 2 | 1 |  |
| RING/U-box | UBA-like | 2 | 1 |  |
| DAK1/DegV-like | 2 | 1 |  |
| Aromatic compound dioxygenase | Carbohydrate binding domain | 2 | 1 |  |
| PRP4-like | WD40 repeat-like | 2 | 1 |  |
| FMN-dependent nitroreductase-like | FMN-dependent nitroreductase-like | 2 | 2 |  |
| PYP-like sensor domain (PAS domain) | C-terminal effector domain of the bipartite response regulators | 2 | 1 |  |
| Cytochrome c oxidase subunit II-like, transmembrane region | Cytochrome c | 2 | 1 |  |
| Growth factor receptor domain | TNF receptor-like | 2 | 1 |  |
| PH domain-like | BSD domain-like | 2 | 1 |  |
| Sigma3 and sigma4 domains of RNA polymerase sigma factors | NTF2-like | 2 | 1 |  |
| Ubiquitin-like | Thymidylate synthase/dCMP hydroxymethylase | 2 | 1 |  |
| Clc chloride channel | Carbon-nitrogen hydrolase | 2 | 1 |  |
| NTF2-like | UBA-like | 2 | 1 |  |
| Actin depolymerizing proteins | RNI-like | 2 | 1 |  |
| Class I glutamine amidotransferase-like | 2 | 1 |  |
| Class I glutamine amidotransferase-like | Ferritin-like | 2 | 1 |  |
| EF-hand | P-loop containing nucleoside triphosphate hydrolases | 2 | 1 |  |
| Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane anchor | 2 | 1 |  |
| EF-hand | C-terminal domain of PLC-beta | 2 | 1 |  |
| Transcription factor STAT-4 N-domain | STAT | 2 | 1 |  |
| Ribosomal L27 protein-like | Eukaryotic type KH-domain (KH-domain type I) | 2 | 1 |  |
| HSP20-like chaperones | HSP20-like chaperones | 2 | 1 |  |
| Acetyl-CoA synthetase-like | 2 | 1 |  |
| Cysteine proteinases | 2 | 1 |  |
| Calponin-homology domain, CH-domain | PH domain-like | 2 | 1 |  |
| Lysozyme-like | PH domain-like | 2 | 1 |  |
| Ribulose-phoshate binding barrel | PRTase-like | 2 | 1 |  |
| E set domains | alpha/beta-Hydrolases | 2 | 1 |  |
| PriA/YqbF domain | Rho N-terminal domain-like | 2 | 1 |  |
| GroEL equatorial domain-like | GroEL equatorial domain-like | 2 | 1 |  |
| PX domain | CAD & PB1 domains | 2 | 1 |  |
| TRAF domain-like | Cysteine proteinases | 2 | 1 |  |
| S-adenosyl-L-methionine-dependent methyltransferases | Protein-L-isoaspartyl O-methyltransferase, C-terminal domain | 2 | 1 |  |
| Starch-binding domain-like | (Phosphotyrosine protein) phosphatases II | 2 | 1 |  |
| ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | 2 | 1 |  |
| LDL receptor-like module | Calcium-dependent phosphotriesterase | 2 | 1 |  |
| Carbonic anhydrase | 2 | 1 |  |
| Periplasmic binding protein-like II | Clavaminate synthase-like | 2 | 1 |  |
| Family A G protein-coupled receptor-like | Immunoglobulin | 2 | 2 |  |
| RuvA domain 2-like | SH2 domain | 2 | 2 |  |
| FumA C-terminal domain-like | 2 | 1 |  |
| Histone-fold | ARM repeat | 2 | 1 |  |
| Viral glycoprotein, central and dimerisation domains | Viral glycoprotein, central and dimerisation domains | 2 | 1 |  |
| Lysozyme-like | Cytochromes | 2 | 1 |  |
| vWA-like | SAP domain | 2 | 1 |  |
| Sigma2 domain of RNA polymerase sigma factors | NTF2-like | 2 | 1 |  |
| LysM domain | Cysteine proteinases | 2 | 1 |  |
| Staphylokinase/streptokinase | Staphylokinase/streptokinase | 2 | 1 |  |
| PYP-like sensor domain (PAS domain) | SpoIIaa-like | 2 | 1 |  |
| Tp47 lipoprotein, N-terminal domain | Tp47 lipoprotein, middle and C-terminal domains | 2 | 1 |  |
| Phase 1 flagellin | Phase 1 flagellin | 2 | 2 |  |
| Calponin-homology domain, CH-domain | DBL homology domain (DH-domain) | 2 | 1 |  |
| HP0242-like | HP0242-like | 2 | 1 |  |
| ASF1-like | 2 | 1 |  |
| Ribonuclease H-like | SH2 domain | 2 | 2 |  |
| KA1-like | 2 | 1 |  |
| Bacterial GAP domain | (Phosphotyrosine protein) phosphatases II | 2 | 1 |  |
| Inhibitor of apoptosis (IAP) repeat | Inhibitor of apoptosis (IAP) repeat | 2 | 1 |  |
| delta-Endotoxin (insectocide), N-terminal domain | Mannose-binding lectins | 2 | 1 |  |
| GspK insert domain-like | GspK insert domain-like | 2 | 1 |  |
| Myosin rod fragments | 2 | 1 |  |
| EF-hand | Thioredoxin-like | 2 | 1 |  |
| 4Fe-4S ferredoxins | Adenine nucleotide alpha hydrolases-like | 2 | 1 |  |
| Bromodomain | RING/U-box | 2 | 1 |  |
| Periplasmic binding protein-like II | cAMP-binding domain-like | 2 | 1 |  |
| Thioredoxin-like | FMN-dependent nitroreductase-like | 2 | 1 |  |
| Protein prenylyltransferase | 2 | 1 |  |
| Galactose mutarotase-like | CBD9-like | 2 | 1 |  |
| Ankyrin repeat | FabD/lysophospholipase-like | 2 | 1 |  |
| ROP protein | ROP protein | 2 | 1 |  |
| Transducin (heterotrimeric G protein), gamma chain | Regulator of G-protein signaling, RGS | 2 | 1 |  |
| Isochorismatase-like hydrolases | ACP-like | 2 | 1 |  |
| Chitinase insertion domain | 2 | 1 |  |
| I/LWEQ domain | alpha-catenin/vinculin-like | 2 | 1 |  |
| CBD9-like | PHM/PNGase F | 2 | 1 |  |
| E set domains | CBD9-like | 2 | 1 |  |
| DinB/YfiT-like putative metalloenzymes | SCP-like | 2 | 1 |  |
| Ribbon-helix-helix | Tetramerization domain of the Mnt repressor | 2 | 1 |  |
| Radical SAM enzymes | Acyl-CoA N-acyltransferases (Nat) | 2 | 1 |  |
| Beta-D-glucan exohydrolase, C-terminal domain | Galactose-binding domain-like | 2 | 1 |  |
| Terpenoid synthases | 2 | 1 |  |
| Autotransporter | 2 | 1 |  |
| RNA-binding domain, RBD | Ran binding protein zinc finger-like | 2 | 1 |  |
| Leucine zipper domain | Nucleotide cyclase | 2 | 1 |  |
| Fibronectin type III | Protein kinase-like (PK-like) | 2 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | HAND domain of the nucleosome remodeling ATPase ISWI | 2 | 1 |  |
| Peptidoglycan deacetylase N-terminal noncatalytic region | Glycoside hydrolase/deacetylase | 2 | 1 |  |
| 4Fe-4S ferredoxins | DHS-like NAD/FAD-binding domain | 2 | 1 |  |
| Galactose-binding domain-like | 2 | 1 |  |
| Immunoglobulin-binding domains | UBA-like | 2 | 1 |  |
| N-terminal nucleophile aminohydrolases (Ntn hydrolases) | N-terminal nucleophile aminohydrolases (Ntn hydrolases) | 2 | 1 |  |
| NAD-binding domain of HMG-CoA reductase | 2 | 1 |  |
| Cyanovirin-N | Cyanovirin-N | 2 | 1 |  |
| Six-hairpin glycosidases | Six-hairpin glycosidases | 2 | 1 |  |
| Inhibitor of apoptosis (IAP) repeat | P-loop containing nucleoside triphosphate hydrolases | 2 | 1 |  |
| WWE domain | WWE domain | 1 | 1 |  |
| Lipovitellin-phosvitin complex; beta-sheet shell regions | Lipovitellin-phosvitin complex, superhelical domain | 1 | 1 |  |
| Inhibitor of apoptosis (IAP) repeat | RING/U-box | 1 | 1 |  |
| beta-sandwich domain of Sec23/24 | ARM repeat | 1 | 1 |  |
| Immunoglobulin-binding domains | Carboxypeptidase regulatory domain-like | 1 | 1 |  |
| Type II DNA topoisomerase | GyrA/ParC C-terminal domain-like | 1 | 1 |  |
| Hairpin loop containing domain-like | Hairpin loop containing domain-like | 1 | 1 |  |
| Obg GTP-binding protein N-terminal domain | Obg GTP-binding protein C-terminal domain | 1 | 1 |  |
| Histidine-containing phosphotransfer domain, HPT domain | 1 | 1 |  |
| PUA domain-like | SWIB/MDM2 domain | 1 | 1 |  |
| ALDH-like | ALDH-like | 1 | 1 |  |
| FwdE-like | Glucocorticoid receptor-like (DNA-binding domain) | 1 | 1 |  |
| DBL homology domain (DH-domain) | FYVE/PHD zinc finger | 1 | 1 |  |
| Ribokinase-like | 1 | 1 |  |
| Homing endonucleases | YcfA/nrd intein domain | 1 | 1 |  |
| NHL repeat | YVTN repeat-like/Quinoprotein amine dehydrogenase | 1 | 1 |  |
| Globin-like | Ferredoxin reductase-like, C-terminal NADP-linked domain | 1 | 1 |  |
| Clavaminate synthase-like | S-adenosyl-L-methionine-dependent methyltransferases | 1 | 1 |  |
| FKBP-like | 1 | 1 |  |
| HMA, heavy metal-associated domain | 1 | 1 |  |
| N-terminal domains of the minor coat protein g3p | TolA/TonB C-terminal domain | 1 | 1 |  |
| Regulator of G-protein signaling, RGS | DBL homology domain (DH-domain) | 1 | 1 |  |
| Cysteine-rich domain | Cysteine-rich domain | 1 | 1 |  |
| Ubiquitin-like | BAG domain | 1 | 1 |  |
| Outer membrane efflux proteins (OEP) | Outer membrane efflux proteins (OEP) | 1 | 1 |  |
| C-terminal domain of Ku80 | C-terminal domain of Ku80 | 1 | 1 |  |
| Colicin Ia, N-terminal domain | Colicin | 1 | 1 |  |
| Zn-dependent exopeptidases | Prokaryotic SH3-related domain | 1 | 1 |  |
| Ribosomal protein S5 domain 2-like | Cna protein B-type domain | 1 | 1 |  |
| DNA breaking-rejoining enzymes | "Winged helix" DNA-binding domain | 1 | 1 |  |
| Perfringolysin | Concanavalin A-like lectins/glucanases | 1 | 1 |  |
| LigB-like | LigA subunit of an aromatic-ring-opening dioxygenase LigAB | 1 | 1 |  |
| p53-like transcription factors | "Winged helix" DNA-binding domain | 1 | 1 |  |
| Fic-like | "Winged helix" DNA-binding domain | 1 | 1 |  |
| SET domain | Ankyrin repeat | 1 | 1 |  |
| UBA-like | 1 | 1 |  |
| CCCH zinc finger | 1 | 1 |  |
| PH domain-like | Cullin repeat-like | 1 | 1 |  |
| Glutamine synthetase/guanido kinase | Glutamine synthetase/guanido kinase | 1 | 1 |  |
| SMAD/FHA domain | SMAD/FHA domain | 1 | 1 |  |
| NHL repeat | 3-carboxy-cis,cis-mucoante lactonizing enzyme | 1 | 1 |  |
| ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase | Cna protein B-type domain | 1 | 1 |  |
| Doublecortin (DC) | Doublecortin (DC) | 1 | 1 |  |
| Phosphoglycerate kinase | Phosphoglycerate kinase | 1 | 1 |  |
| F-box domain | Ankyrin repeat | 1 | 1 |  |
| Single hybrid motif | Single hybrid motif | 1 | 1 |  |
| N-utilization substance G protein NusG, N-terminal domain | N-utilization substance G protein NusG, N-terminal domain | 1 | 1 |  |
| N-utilization substance G protein NusG, N-terminal domain | N-utilization substance G protein NusG, N-terminal domain | 1 | 1 |  |
| Sema domain | Immunoglobulin | 1 | 1 |  |
| RUN domain-like | Lipase/lipooxygenase domain (PLAT/LH2 domain) | 1 | 1 |  |
| Zinc beta-ribbon | Prokaryotic SH3-related domain | 1 | 1 |  |
| Nucleotide-diphospho-sugar transferases | Cell wall binding repeat | 1 | 1 |  |
| Hect, E3 ligase catalytic domain | 1 | 1 |  |
| PK beta-barrel domain-like | Phosphohistidine domain | 1 | 1 |  |
| RNA-binding domain, RBD | Bacterial immunoglobulin/albumin-binding domains | 1 | 1 |  |
| SH2 domain | C2 domain (Calcium/lipid-binding domain, CaLB) | 1 | 1 |  |
| Immunoglobulin-binding domains | CAD & PB1 domains | 1 | 1 |  |
| Trypsin-like serine proteases | Trypsin-like serine proteases | 1 | 1 |  |
| 6-phosphogluconate dehydrogenase C-terminal domain-like | 1 | 1 |  |
| DNase I-like | 1 | 1 |  |
| Periplasmic binding protein-like II | E6 C-terminal domain-like | 1 | 1 |  |
| "Winged helix" DNA-binding domain | GAD domain-like | 1 | 1 |  |
| SH3-domain | GTPase activation domain, GAP | 1 | 1 |  |
| Ubiquitin-like | HAD-like | 1 | 1 |  |
| FKBP-like | 1 | 1 |  |
| Uracil-DNA glycosylase-like | Pre-PUA domain | 1 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | Obg GTP-binding protein C-terminal domain | 1 | 1 |  |
| cAMP-binding domain-like | "Winged helix" DNA-binding domain | 1 | 1 |  |
| PHM/PNGase F | Calcium-dependent phosphotriesterase | 1 | 1 |  |
| Ran binding protein zinc finger-like | SMAD/FHA domain | 1 | 1 |  |
| Periplasmic binding protein-like II | Activating enzymes of the ubiquitin-like proteins | 1 | 1 |  |
| PKD domain | Immunoglobulin | 1 | 1 |  |
| Ubiquitin-like | PP2C-like | 1 | 1 |  |
| Glu-tRNAGln amidotransferase C subunit | Nucleotidylyl transferase | 1 | 1 |  |
| SacY-like RNA-binding domain | PTS-regulatory domain, PRD | 1 | 1 |  |
| Histidine-containing phosphotransfer domain, HPT domain | CheY-binding domain of CheA | 1 | 1 |  |
| GFP-like | Ubiquitin-like | 1 | 1 |  |
| Ribosomal protein L25-like | GatB/YqeY motif | 1 | 1 |  |
| Cysteine-rich domain | Protein kinase-like (PK-like) | 1 | 1 |  |
| WGR domain-like | RNI-like | 1 | 1 |  |
| Tachylectin-2 | NHL repeat | 1 | 1 |  |
| Ribbon-helix-helix | FAD-linked oxidoreductase | 1 | 1 |  |
| Thyroglobulin type-1 domain | Thymidylate synthase/dCMP hydroxymethylase | 1 | 1 |  |
| Glycosyl hydrolase domain | 1 | 1 |  |
| Microbial ribonucleases | Ubiquitin-like | 1 | 1 |  |
| Nucleotidylyl transferase | Nucleic acid-binding proteins | 1 | 1 |  |
| Galactose-binding domain-like | Immunoglobulin | 1 | 1 |  |
| Glyceraldehyde-3-phosphate dehydrogenase-like, C-terminal domain | 1 | 1 |  |
| Ferritin-like | Ferritin-like | 1 | 1 |  |
| FYVE/PHD zinc finger | Elongation factor TFIIS domain 2 | 1 | 1 |  |
| Histone-fold | DBL homology domain (DH-domain) | 1 | 1 |  |
| Periplasmic binding protein-like I | Periplasmic binding protein-like I | 1 | 1 |  |
| Inosine monophosphate dehydrogenase (IMPDH) | Inosine monophosphate dehydrogenase (IMPDH) | 1 | 1 |  |
| Leucine zipper domain | NAD(P)-binding Rossmann-fold domains | 1 | 1 |  |
| Phase 1 flagellin | 1 | 1 |  |
| SAM/Pointed domain | "Winged helix" DNA-binding domain | 1 | 1 |  |
| RecG, N-terminal domain | P-loop containing nucleoside triphosphate hydrolases | 1 | 1 |  |
| N-acetylmuramoyl-L-alanine amidase-like | Cell wall binding repeat | 1 | 1 |  |
| Single hybrid motif | FAD/NAD-linked reductases, dimerisation (C-terminal) domain | 1 | 1 |  |
| Ras GEF | Cysteine-rich domain | 1 | 1 |  |
| Rhodanese/Cell cycle control phosphatase | FKBP-like | 1 | 1 |  |
| CCCH zinc finger | Retrovirus zinc finger-like domains | 1 | 1 |  |
| Signal recognition particle alu RNA binding heterodimer, SRP9/14 | Signal recognition particle alu RNA binding heterodimer, SRP9/14 | 1 | 1 |  |
| Glu-tRNAGln amidotransferase C subunit | An anticodon-binding domain of class I aminoacyl-tRNA synthetases | 1 | 1 |  |
| Growth factor receptor domain | TB module/8-cys domain | 1 | 1 |  |
| Cloacin translocation domain | Colicin | 1 | 1 |  |
| Pectin lyase-like | PKD domain | 1 | 1 |  |
| Alpha-L RNA-binding motif | S-adenosyl-L-methionine-dependent methyltransferases | 1 | 1 |  |
| FnI-like domain | EGF/Laminin | 1 | 1 |  |
| Sec-C motif | NTF2-like | 1 | 1 |  |
| PH domain-like | Ras GEF | 1 | 1 |  |
| Carbohydrate-binding domain | Fibronectin type III | 1 | 1 |  |
| Carboxypeptidase regulatory domain-like | YVTN repeat-like/Quinoprotein amine dehydrogenase | 1 | 1 |  |
| HRDC-like | HRDC-like | 1 | 1 |  |
| Uracil-DNA glycosylase-like | PUA domain-like | 1 | 1 |  |
| TAF(II)230 TBP-binding fragment | Bromodomain | 1 | 1 |  |
| Folate-binding domain | TrmE connector domain | 1 | 1 |  |
| D-aminopeptidase, middle and C-terminal domains | D-aminopeptidase, middle and C-terminal domains | 1 | 1 |  |
| PX domain | PH domain-like | 1 | 1 |  |
| Cadherin-like | Glycosyl hydrolase domain | 1 | 1 |  |
| Nucleic acid-binding proteins | SH2 domain | 1 | 1 |  |
| Peptide deformylase | 1 | 1 |  |
| Metallo-hydrolase/oxidoreductase | Cell wall binding repeat | 1 | 1 |  |
| Chaperone J-domain | CSL zinc finger | 1 | 1 |  |
| Wiscott-Aldrich syndrome protein, WASP, C-terminal domain | Wiscott-Aldrich syndrome protein, WASP, C-terminal domain | 1 | 1 |  |
| Flagellar hook protein flgE | Flagellar hook protein flgE | 1 | 1 |  |
| WD40 repeat-like | DPP6 N-terminal domain-like | 1 | 1 |  |
| Cytochrome c | Multiheme cytochromes | 1 | 1 |  |
| NAD(P)-binding Rossmann-fold domains | Galactose mutarotase-like | 1 | 1 |  |
| X-Prolyl dipeptidyl aminopeptidase PepX, N-terminal domain | alpha/beta-Hydrolases | 1 | 1 |  |
| Chaperone J-domain | Thioredoxin-like | 1 | 1 |  |
| EGF/Laminin | Fibronectin type III | 1 | 1 |  |
| SAM/Pointed domain | ARM repeat | 1 | 1 |  |
| SpoIIaa-like | 1 | 1 |  |
| Oxygen-evolving enhancer protein 3, | Cyclophilin-like | 1 | 1 |  |
| Transcription factor IIA (TFIIA), beta-barrel domain | Transcription factor IIA (TFIIA), beta-barrel domain | 1 | 1 |  |
| LEM domain | LEM domain | 1 | 1 |  |
| lambda repressor-like DNA-binding domains | Periplasmic binding protein-like II | 1 | 1 |  |
| Class II aaRS and biotin synthetases | C-terminal domain of ProRS | 1 | 1 |  |
| HMG-box | 1 | 1 |  |
| CAD & PB1 domains | His-Me finger endonucleases | 1 | 1 |  |
| ACP-like | ACP-like | 1 | 1 |  |
| Voltage-gated potassium channels | Leucine zipper domain | 1 | 1 |  |
| Nitrile hydratase alpha chain | Nitrile hydratase alpha chain | 1 | 1 |  |
| SH2 domain | Ubiquitin-like | 1 | 1 |  |
| Cadherin-like | (Trans)glycosidases | 1 | 1 |  |
| D-lysine 5,6-aminomutase beta subunit KamE, N-terminal domain | Cobalamin (vitamin B12)-binding domain | 1 | 1 |  |
| Leech antihemostatic proteins | Leech antihemostatic proteins | 1 | 1 |  |
| Single hybrid motif | FAD/NAD(P)-binding domain | 1 | 1 |  |
| Nucleotidylyl transferase | GatB/YqeY motif | 1 | 1 |  |
| Ubiquitin-like | Ribosomal protein S5 domain 2-like | 1 | 1 |  |
| Mannose-binding lectins | Kelch motif | 1 | 1 |  |
| Hedgehog/intein (Hint) domain | YcfA/nrd intein domain | 1 | 1 |  |
| SGNH hydrolase | 1 | 1 |  |
| AbrB/MazE/MraZ-like | AbrB/MazE/MraZ-like | 1 | 1 |  |
| E set domains | Prokaryotic SH3-related domain | 1 | 1 |  |
| Thioredoxin-like | Family A G protein-coupled receptor-like | 1 | 1 |  |
| Lipovitellin-phosvitin complex; beta-sheet shell regions | Lipovitellin-phosvitin complex; beta-sheet shell regions | 1 | 1 |  |
| Lipocalins | 1 | 1 |  |
| Voltage-gated potassium channels | 1 | 1 |  |
| Nucleic acid-binding proteins | PHP domain-like | 1 | 1 |  |
| FliG | FliG | 1 | 1 |  |
| "Winged helix" DNA-binding domain | TrmB C-terminal domain-like | 1 | 1 |  |
| Methionyl-tRNA synthetase (MetRS), Zn-domain | Nucleic acid-binding proteins | 1 | 1 |  |
| Heme-dependent catalase-like | Lipoxigenase | 1 | 1 |  |
| Lysozyme-like | 1 | 1 |  |
| Virus ectodomain | 1 | 1 |  |
| Plakin repeat | Plakin repeat | 1 | 1 |  |
| beta-beta-alpha zinc fingers | WW domain | 1 | 1 |  |
| Heterotrimerisation domain of extracellular hemoglobin linker subunits | Extracellular hemoglobin linker subunit, receptor domain | 1 | 1 |  |
| Pectin lyase-like | Autotransporter | 1 | 1 |  |
| Quinoprotein alcohol dehydrogenase-like | Quinoprotein alcohol dehydrogenase-like | 1 | 1 |  |
| Penicillin-binding protein 2x (pbp-2x), c-terminal domain | 1 | 1 |  |
| Ferritin-like | Spectrin repeat | 1 | 1 |  |
| SAP domain | SAP domain | 1 | 1 |  |
| Ribbon-helix-helix | Ribbon-helix-helix | 1 | 1 |  |
| Cobalamin adenosyltransferase-like | 1 | 1 |  |
| HSP90 C-terminal domain | Cna protein B-type domain | 1 | 1 |  |
| gp120 core | Virus ectodomain | 1 | 1 |  |
| Sigma2 domain of RNA polymerase sigma factors | C-terminal effector domain of the bipartite response regulators | 1 | 1 |  |
| Metalloproteases ("zincins"), catalytic domain | TSP-1 type 1 repeat | 1 | 1 |  |
| FLJ32549 domain-like | FLJ32549 C-terminal domain-like | 1 | 1 |  |
| PGBD-like | Hedgehog/DD-peptidase | 1 | 1 |  |
| Putative methyltransferase TM0872, insert domain | 1 | 1 |  |
| GDNF receptor-like | GDNF receptor-like | 1 | 1 |  |
| "Winged helix" DNA-binding domain | NagB/RpiA/CoA transferase-like | 1 | 1 |  |
| Immunoglobulin-binding domains | YVTN repeat-like/Quinoprotein amine dehydrogenase | 1 | 1 |  |
| cAMP-binding domain-like | 1 | 1 |  |
| Elafin-like | Fibronectin type III | 1 | 1 |  |
| Putative DNA-binding domain | Antibiotic binding domain of TipA-like multidrug resistance regulators | 1 | 1 |  |
| Subunit III of photosystem I reaction centre, PsaF | 1 | 1 |  |
| Ribosomal protein L13 | Ribosomal protein L13 | 1 | 1 |  |
| Plant proteinase inhibitors | Plant proteinase inhibitors | 1 | 1 |  |
| beta-N-acetylhexosaminidase-like domain | Galactose-binding domain-like | 1 | 1 |  |
| Restriction endonuclease-like | Rad51 N-terminal domain-like | 1 | 1 |  |
| Nuclear receptor ligand-binding domain | 1 | 1 |  |
| Ran binding protein zinc finger-like | "Winged helix" DNA-binding domain | 1 | 1 |  |
| Inhibitor of apoptosis (IAP) repeat | DEATH domain | 1 | 1 |  |
| Aspartate/ornithine carbamoyltransferase | 1 | 1 |  |
| Ferritin-like | Nucleotide cyclase | 1 | 1 |  |
| His-Me finger endonucleases | DNA-binding domain of intron-encoded endonucleases | 1 | 1 |  |
| Helical scaffold and wing domains of SecA | Helical scaffold and wing domains of SecA | 1 | 1 |  |
| Acetyl-CoA synthetase-like | Thiolase-like | 1 | 1 |  |
| Nop domain | Nop domain | 1 | 1 |  |
| Ribbon-helix-helix | N-terminal domain of bifunctional PutA protein | 1 | 1 |  |
| FYVE/PHD zinc finger | RNA-binding domain, RBD | 1 | 1 |  |
| Ferredoxin thioredoxin reductase (FTR), catalytic beta chain | Rubredoxin-like | 1 | 1 |  |
| Prismane protein-like | alpha-helical ferredoxin | 1 | 1 |  |
| Cysteine proteinases | 1 | 1 |  |
| L domain-like | Prokaryotic SH3-related domain | 1 | 1 |  |
| Stathmin | Stathmin | 1 | 1 |  |
| RalF, C-terminal domain | 1 | 1 |  |
| Histone-fold | Ras GEF | 1 | 1 |  |
| Bet v1-like | NAD(P)-binding Rossmann-fold domains | 1 | 1 |  |
| Leucine zipper domain | TNF-like | 1 | 1 |  |
| Ribulose-phoshate binding barrel | NAD(P)-binding Rossmann-fold domains | 1 | 1 |  |
| eIF1-like | 1 | 1 |  |
| Group V grass pollen allergen | Group V grass pollen allergen | 1 | 1 |  |
| X-Prolyl dipeptidyl aminopeptidase PepX, N-terminal domain | Galactose-binding domain-like | 1 | 1 |  |
| V-type ATP synthase subunit C | V-type ATP synthase subunit C | 1 | 1 |  |
| Ribosomal protein S5 domain 2-like | Polynucleotide phosphorylase/guanosine pentaphosphate synthase (PNPase/GPSI), domain 3 | 1 | 1 |  |
| Growth factor receptor domain | Kazal-type serine protease inhibitors | 1 | 1 |  |
| PH domain-like | Ran binding protein zinc finger-like | 1 | 1 |  |
| Galactose-binding domain-like | SGNH hydrolase | 1 | 1 |  |
| Ribosomal protein S2 | Nucleic acid-binding proteins | 1 | 1 |  |
| PH domain-like | "Winged helix" DNA-binding domain | 1 | 1 |  |
| Subdomain of clathrin and coatomer appendage domain | 1 | 1 |  |
| P-loop containing nucleoside triphosphate hydrolases | vWA-like | 1 | 1 |  |
| "Winged helix" DNA-binding domain | Putative transcriptional regulator TM1602, C-terminal domain | 1 | 1 |  |
| Acyl-CoA N-acyltransferases (Nat) | tRNA-binding arm | 1 | 1 |  |
| WD40 repeat-like | Cyclophilin-like | 1 | 1 |  |
| Fibritin | 1 | 1 |  |
| Aquaporin-like | 1 | 1 |  |
| SH2 domain | ARM repeat | 1 | 1 |  |
| MurE/MurF N-terminal domain | MurD-like peptide ligases, peptide-binding domain | 1 | 1 |  |
| vWA-like | SAP domain | 1 | 1 |  |
| PH domain-like | FYVE/PHD zinc finger | 1 | 1 |  |
| Multidrug efflux transporter AcrB transmembrane domain | Multidrug efflux transporter AcrB transmembrane domain | 1 | 1 |  |
| Cupredoxins | Immunoglobulin | 1 | 1 |  |
| Hyaluronidase post-catalytic domain-like | Galactose-binding domain-like | 1 | 1 |  |
| Ras GEF | EF-hand | 1 | 1 |  |
| Putative DNA-binding domain | Initiation factor IF2/eIF5b, domain 3 | 1 | 1 |  |
| C-terminal domain of transcriptional repressors | C-terminal domain of transcriptional repressors | 1 | 1 |  |
| 3-carboxy-cis,cis-mucoante lactonizing enzyme | Quinoprotein alcohol dehydrogenase-like | 1 | 1 |  |
| BPTI-like | LDL receptor-like module | 1 | 1 |  |
| Protein kinase-like (PK-like) | Protein kinase-like (PK-like) | 1 | 1 |  |
| DBL homology domain (DH-domain) | C2 domain (Calcium/lipid-binding domain, CaLB) | 1 | 1 |  |
| KA1-like | 1 | 1 |  |
| omega toxin-like | omega toxin-like | 1 | 1 |  |
| Periplasmic binding protein-like II | FKBP-like | 1 | 1 |  |
| A middle domain of Talin 1 | I/LWEQ domain | 1 | 1 |  |
| Folate-binding domain | P-loop containing nucleoside triphosphate hydrolases | 1 | 1 |  |
| Periplasmic binding protein-like II | Bifunctional inhibitor/lipid-transfer protein/seed storage 2S albumin | 1 | 1 |  |
| Actin-like ATPase domain | TPR-like | 1 | 1 |  |
| Cullin repeat-like | "Winged helix" DNA-binding domain | 1 | 1 |  |
| Transcription factor IIA (TFIIA), alpha-helical domain | Transcription factor IIA (TFIIA), alpha-helical domain | 1 | 1 |  |
| EF-hand | Cysteine-rich domain | 1 | 1 |  |
| PUA domain-like | eIF1-like | 1 | 1 |  |
| Carboxypeptidase regulatory domain-like | 3-carboxy-cis,cis-mucoante lactonizing enzyme | 1 | 1 |  |
| RecG, N-terminal domain | Nucleic acid-binding proteins | 1 | 1 |  |
| Collagen-binding domain | Collagen-binding domain | 1 | 1 |  |
| Tryptophan synthase beta subunit-like PLP-dependent enzymes | ACT-like | 1 | 1 |  |
| Anticodon-binding domain of a subclass of class I aminoacyl-tRNA synthetases | Nucleic acid-binding proteins | 1 | 1 |  |
| DnaJ/Hsp40 cysteine-rich domain | HSP40/DnaJ peptide-binding domain | 1 | 1 |  |
| Diaminopimelate epimerase-like | 1 | 1 |  |
| Ricin B-like lectins | Fibronectin type III | 1 | 1 |  |
| (Trans)glycosidases | Fibronectin type III | 1 | 1 |  |
| Gamma-glutamyl cyclotransferase-like | Gamma-glutamyl cyclotransferase-like | 1 | 1 |  |
| UBC-like | 1 | 1 |  |
| Metalloproteases ("zincins"), catalytic domain | PDZ domain-like | 1 | 1 |  |
| Acetyl-CoA synthetase-like | S-adenosyl-L-methionine-dependent methyltransferases | 1 | 1 |  |
| Periplasmic binding protein-like II | WD40 repeat-like | 1 | 1 |  |
| GatB/YqeY motif | 1 | 1 |  |
| TNF-like | Periplasmic binding protein-like I | 1 | 1 |  |
| E set domains | Carbohydrate binding domain | 1 | 1 |  |
| Sec-C motif | Sec-C motif | 1 | 1 |  |
| beta-lactamase/transpeptidase-like | D-aminopeptidase, middle and C-terminal domains | 1 | 1 |  |
| Ubiquitin-like | JAB1/MPN domain | 1 | 1 |  |
| Prion-like | 1 | 1 |  |
| Ubiquitin-like | P-loop containing nucleoside triphosphate hydrolases | 1 | 1 |  |
| GFP-like | Thioredoxin-like | 1 | 1 |  |
| PLP-binding barrel | 1 | 1 |  |
| SWIB/MDM2 domain | 1 | 1 |  |
| Immunoglobulin-binding domains | NHL repeat | 1 | 1 |  |
| WD40 repeat-like | Peptidase/esterase 'gauge' domain | 1 | 1 |  |
| EGF/Laminin | Calcium-dependent phosphotriesterase | 1 | 1 |  |
| Rudiment single hybrid motif | Cytochrome f subunit of the cytochrome b6f complex, transmembrane anchor | 1 | 1 |  |
| Concanavalin A-like lectins/glucanases | Cadherin-like | 1 | 1 |  |
| CBS-domain pair | FAD-binding/transporter-associated domain-like | 1 | 1 |  |
| Ribosomal protein S6 | Ribosomal protein S6 | 1 | 1 |  |
| DEATH domain | RING/U-box | 1 | 1 |  |
| DEATH domain | RING/U-box | 1 | 1 |  |
| YbaK/ProRS associated domain | HD-domain/PDEase-like | 1 | 1 |  |
| eEF-1beta-like | 1 | 1 |  |
| SH3-domain | Immunoglobulin-binding domains | 1 | 1 |  |
| LeuD/IlvD-like | 1 | 1 |  |
| Clathrin adaptor appendage domain | 1 | 1 |  |
| Fe-S cluster assembly (FSCA) domain-like | Fe-S cluster assembly (FSCA) domain-like | 1 | 1 |  |