SUPERFAMILY 1.75 HMM library and genome assignments server

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Trefoil superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   Small proteins [ 56992] (90)
Fold:   Trefoil/Plexin domain-like [ 57491] (3)
Superfamily:   Trefoil [ 57492]
Families:   Trefoil [ 57493] (3)


Superfamily statistics
Genomes (140) Uniprot 2018_03 genome PDB chains (SCOP 1.75)
Domains 1,013 2,572 5
Proteins 810 2,154 4


Functional annotation
General category Processes_IC
Detailed category Proteases

Document:
Function annotation of SCOP domain superfamilies

Enzyme Commission (EC)

(show details)
EC termFDR (all)SDEO levelAnnotation (direct or inherited)
Enzyme Commission (EC)Glycosidases, i.e. enzymes hydrolyzing O- and S-gl0Moderately InformativeDirect

Document: EC annotation of SCOP domains

Human Phenotype (HP)

(show details) Document: HP annotation of SCOP domains

Mouse Phenotype (MP)

(show details)
MP termFDR (all)SDMP levelAnnotation (direct or inherited)
Mammalian Phenotype (MP)abnormal digestive system morphology0.01884Moderately InformativeInherited
Mammalian Phenotype (MP)abnormal intestine morphology0.001926InformativeInherited

Document: MP annotation of SCOP domains

Xenopus Anatomy (XA)

(show details)
XA termFDR (all)SDXA levelAnnotation (direct or inherited)
Xenopus ANatomical entity (XAN)embryo0Least InformativeDirect
Xenopus ANatomical entity (XAN)tissue0Least InformativeDirect

Document: XA annotation of SCOP domains

Enzyme Commission (EC)

(show details)
EC termFDR (all)SDEC levelAnnotation (direct or inherited)
Enzyme Commission (EC)Hydrolases0Least InformativeDirect
Enzyme Commission (EC)Glycosylases0Moderately InformativeDirect

Document: EC annotation of SCOP domains

InterPro annotation
Cross references IPR000519 SSF57492 Protein matches
Abstract A cysteine-rich domain of approximately forty five amino-acid residues has been found in some extracellular eukaryotic proteins [PubMed7820556, PubMed9187350, PubMed8518738, PubMed8267796]. It is known as either the 'P', 'trefoil' or 'TFF' domain, and contains six cysteines linked by three disulphide bonds with connectivity 1-5, 2-4, 3-6. The domain has been found in a variety of extracellular eukaryotic proteins [PubMed7820556, PubMed8518738, PubMed8267796], including protein pS2 (TFF1), a protein secreted by the stomach mucosa; spasmolytic polypeptide (SP) (TFF2), a protein of about 115 residues that inhibits gastrointestinal motility and gastric acid secretion; intestinal trefoil factor (ITF) (TFF3); Xenopus laevis stomach proteins xP1 and xP4; xenopus integumentary mucins A.1 (FIM-A.1 or preprospasmolysin) and C.1 (FIM-C.1), proteins which may be involved in defense against microbial infections by protecting the epithelia from the external environment; xenopus skin protein xp2 (or APEG); Zona pellucida sperm-binding protein B (ZP-B); intestinal sucrase-isomaltase , a vertebrate membrane bound, multifunctional enzyme complex which hydrolyzes sucrose, maltose and isomaltose; and lysosomal alpha-glucosidase .

InterPro database


PDBeMotif information about ligands, sequence and structure motifs
Cross references PDB entries
Ligand binding statistics
Nucleic-acid binding statistics
Occurrence of secondary structure elements
Occurrence of small 3D structural motifs

PDBeMotif resource

Jump to [ Top of page · SCOP classification · InterPro annotation · PDBeMotif links · Functional annotation · Enzyme Commission (EC) · Human Phenotype (HP) · Mouse Phenotype (MP) · Xenopus Anatomy (XA) · Enzyme Commission (EC) ]

Internal database links

Browse genome assignments for this superfamily. The SUPERFAMILY hidden Markov model library has been used to carry out SCOP domain assignments to all genomes at the superfamily level.


Alignments of sequences to 4 models in this superfamily are available by clicking on the 'Alignments' icon above. PDB sequences less than 40% identical are shown by default, but any other sequence(s) may be aligned. Select PDB sequences, genome sequences, or paste in or upload your own sequences.


Browse and view proteins in genomes which have different domain combinations including a Trefoil domain.


Examine the distribution of domain superfamilies, or families, across the major taxonomic kingdoms or genomes within a kingdom. This gives an immediate impression of how superfamilies, or families, are restricted to certain kingdoms of life.


Explore domain occurrence network where nodes represent genomes and edges are domain architectures (shared between genomes) containing the superfamily of interest.

There are 4 hidden Markov models representing the Trefoil superfamily. Information on how the models are built, and plots showing hydrophobicity, match emmission probabilities and insertion/deletion probabilities can be inspected.


Jump to [ Top of page · SCOP classification · InterPro annotation · PDBeMotif links · Functional annotation · Enzyme Commission (EC) · Human Phenotype (HP) · Mouse Phenotype (MP) · Xenopus Anatomy (XA) · Enzyme Commission (EC) · Internal database links ]