IPR009199 PIRSF014728 PhoPQ-activated pathogenicity-related protein, PqaA type. Proteins in this entry are believed to play a role in virulence/pathogenicity in Salmonella. Salmonella typhi PqaA has been shown to be activated by PhoP/Q two-component regulatory system, which regulates many virulence genes Baker et al 1997. It has been also shown to confer resistance to antimicrobial peptides (melittin). Autocrine proliferation repressor protein A (AprA, CfaD) is a protein secreted by Dictyostelium discoideum cells. AprA has DPPIV-like protease activity MEROPS ClanSC family S82