The domain within your query sequence starts at position 205 and ends at position 320; the E-value for the CUB domain shown below is 9.11e-5.
CQFELSGADGIVRSSQVEQEEKTKPGQAVDCIWTIKATPKAKIYLRFLDYQMEHSNECKR NFVAVYDGSSAIENLKAKFCSTVANDVMLKTGVGVIRMWADEGSRLSRFRMLFTSF
CUBDomain first found in C1r, C1s, uEGF, and bone morphogenetic protein. |
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SMART accession number: | SM00042 |
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Description: | This domain is found mostly among developmentally-regulated proteins. Spermadhesins contain only this domain. |
Interpro abstract (IPR000859): | The CUB domain (for complement C1r/C1s, Uegf, Bmp1) is a structural motif of approximately 110 residues found almost exclusively in extracellular and plasma membrane-associated proteins, many of which are developmentally regulated [ (PUBMED:8510165) (PUBMED:2026272) ]. These proteins are involved in a diverse range of functions, including complement activation, developmental patterning, tissue repair, axon guidance and angiogenesis, cell signalling, fertilisation, haemostasis, inflammation, neurotransmission, receptor-mediated endocytosis, and tumour suppression [ (PUBMED:17335815) ]. Many CUB-containing proteins are peptidases belonging to MEROPS peptidase families M12A (astacin) and S1A (chymotrypsin). Proteins containing a CUB domain include:
Several of the above proteins consist of a catalytic domain together with several CUB domains interspersed by calcium-binding EGF domains. Some CUB domains appear to be involved in oligomerisation and/or recognition of substrates and binding partners. For example, in the complement proteases, the CUB domains mediate dimerisation and binding to collagen-like regions of target proteins (e.g. C1q for C1r/C1s). The structure of CUB domains consists of a beta-sandwich with a jelly-roll fold. Almost all CUB domains contain four conserved cysteines that probably form two disulphide bridges (C1-C2, C3-C4). The CUB1 domains of C1s and Map19 have calcium-binding sites [ (PUBMED:17446170) ]. |
Family alignment: |
There are 84744 CUB domains in 33329 proteins in SMART's nrdb database.
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- Evolution (species in which this domain is found)
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- Structure (3D structures containing this domain)
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