Xaa-Pro dipeptidyl-peptidase

Xaa-Pro dipeptidyl-peptidase (, X-prolyl dipeptidyl aminopeptidase, PepX, X-prolyl dipeptidyl peptidase is an enzyme.    It catalyses the following chemical reaction


 * Hydrolyses Xaa-Pro bonds to release unblocked, N-terminal dipeptides from substrates including Ala-Pro-p-nitroanilide and (sequentially) Tyr-Pro--Phe-Pro--Gly-Pro--Ile

The intracellular enzyme from Lactococcus lactis (190-kDa) is the type example of peptidase family S15.