-!- Surface-associated subtilisin-like serine peptidase with very specific substrate specificity. -!- Virulent strains of streptococci, including Streptococcus pyogenes, can evade human detection and phagocytosis by destroying the complement chemotaxin C5a. -!- Cleavage of human C5a by this enzyme reduces the ability of C5a to bind receptors on the surface of polymorphonuclear neutrophil leukocytes (PMNLs) and thereby abolishes its chemotactic properties. -!- Belongs to peptidase family S8A.