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SipW-cognate class signal peptide This model describes a protein N-terminal domain found regularly in proteins encoded near a variant form of signal peptidase I such as the SipW protein of Bacillus subtilis. Many though not all members are homologs of camelysin (a casein-cleaving metalloprotease) and TasA (CotN), a metalloprotease that is secreted, along with extracellular polysaccharide (EPS), to be the major protein constituent of the Bacillus subtilis biofilm matrix. Sequencing from several known TasA/CotN proteins shows the cleavage location to be near the center of the alignment and typical of type I signal peptidases, with small residues at -3 and -1. This domain, therefore, appears to be a special subclass of signal peptide. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",