pfam13367: PrsW-protease (this model, PSSM-Id:404277 is obsolete and has been replaced by 433150)
Protease prsW family
This is a family of putative peptidases, possibly belonging to the MEROPS M79 family. PrsW, appears to be a member of a widespread family of membrane proteins that includes at least one previously known protease. PrsW appears to be responsible for Site-1 cleavage of the RsiW anti-sigma factor, the cognate anti-sigma factor, and it senses antimicrobial peptides that damage the cell membrane and other agents that cause cell envelope stress, The three acidic residues, E75, E76 and E95 in Aflv_1074, appear to be crucial since their mutation to alanine renders the protein inactive. Based on predictions of the bioinformatics programme TMHMM it is likely that these residues are located on the extracytoplasmic face of PrsW placing them in a position to act as a sensor for cell envelope stress.
Jiyao W et al.(2023). "The conserved domain database in 2023.",