CEP1 — Asparagus officinalis

Summary

A4U43_C02F9340, designated CEP1 in asparagus (Asparagus officinalis) on chromosome 2, encodes a papain-like cysteine peptidase with thiol endopeptidase activity. The product belongs to the peptidase C1A family and contains a peptidase inhibitor I29 domain. This gene is associated with leaf senescence, programmed cell death involved in cell development, and proteolysis. It is associated with responses to gibberellin, ethylene, and abscisic acid, and with nitrogen storage. The encoded protein localises to senescence-associated vacuoles, protein storage vacuoles, lysosomes, cytoplasmic vesicles, the ER lumen, and the extracellular space. Studies of related genes in other species link the family to similar proteolytic and senescence-related processes.