SUPERFAMILY 1.75 HMM library and genome assignments server

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Cna protein B-type domain superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   All beta proteins [ 48724] (174)
Fold:   Prealbumin-like [ 49451] (7)
Superfamily:   Cna protein B-type domain [ 49478]
Families:   Cna protein B-type domain [ 49479] (2)

Superfamily statistics
Genomes (823) Uniprot 2018_03 genome PDB chains (SCOP 1.75)
Domains 4,586 47,876 7
Proteins 1,785 20,117 3

Functional annotation
General category Processes_EC
Detailed category Cell adhesion

Function annotation of SCOP domain superfamilies

InterPro annotation
Cross references IPR008970 SSF49478 Protein matches

This entry represents a repeated B region domain found in the collagen-binding surface protein Cna in Staphylococcus aureus, which has a prealbumin-like beta-sandwich fold of seven strands in two sheets with a Greek key topology [PubMed10673425]. However, this domain does not mediate collagen binding, the region carries out that function; instead it appears to form a stalk that presents the ligand binding domain away from the bacterial cell surface. Cna is a collagen-binding MSCRAMM (Microbial Surface Component Recognizing Adhesive Matrix Molecules), and is necessary and sufficient for S. aureus cells to adhere to cartilage.

Other proteins contain domains with a similar fold, although they can have an additional 1-2 strands. Such proteins include the C-terminal domain of the beta subunit of transhydroxylase, a molybdenum-containing enzyme from Pelobacter acidigallici that catalyses the conversion of pyrogallol to phoroglucinol, an important building block of plant polymers [PubMed15284442].

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 ]

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 7 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 Cna protein B-type domain 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 7 hidden Markov models representing the Cna protein B-type domain 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 · Internal database links ]