Cleaves proteins C-terminally to the most C-terminal basic residue. Can process the alpha-mating factor precursor. Required for cell wall integrity. Hydrolyzes various precursor proteins with Arg or Lys in P1, and commonly Arg or Lys also in P2. The P3 amino acid is usually non-polar, but otherwise additional basic amino acids are favorable in both non-prime and prime positions. Optimum pH is 4-7. Optimum pH is substrate-dependent. GPI-anchored plasma membrane protein (GPI-PMP). Present with 538 molecules/cell in log phase SD medium. Belongs to the peptidase A1 family.