Probable thiol protease. Predominantly vacuolar. From the Golgi apparatus, probably transported to the lytic vacuole (LV) in clathrin-coated vesicles (CCVs) via the prevacuolar compartment (PVC). By wilting and abscisic acid (ABA) (PubMed:8018874). Induced by drought stress (PubMed:12102506). Belongs to the peptidase C1 family.