Lysine-specific endoprotease (PubMed:12419815). Involved in corneal virulence. Preferential cleavage: Lys-|-Xaa, including Lys-|-Pro. Experiments performed in E.coli. Experiments performed in E.coli. Processing of pro-endopeptidase to mature endopeptidase is probably autocatalytic, as mutations in the probable active site residues prevent processing, and purified inactive pro-endopeptidase disappears in the presence of active endopeptidase. Belongs to the peptidase S1 family.