CEP1 — Solanum tuberosum

Summary

StCEP1 (PGSC0003DMG400010215) on potato chromosome 2 encodes a papain-like cysteine peptidase of the C1A family, possessing thiol endopeptidase activity and binding serpin family proteins and proteinase-activated receptors. The gene is associated with proteolysis, leaf senescence, and programmed cell death involved in cell development. It is associated with defense and immune responses, including innate immunity, as well as responses to the hormones abscisic acid, ethylene, and gibberellin. StCEP1 is linked to phloem development, cell fate determination, and secretion. The encoded protein localizes to the vacuole, lysosome, protein storage vacuole, and senescence-associated vacuole. Studies of related genes in other species link the family to cysteine-type peptidase activity (EC 3.4.22.-) and fruit bromelain-like proteins.