CEP1 — Asparagus officinalis

Summary

A4U43_C01F30820, designated CEP1 in asparagus (Asparagus officinalis) on chromosome 1, encodes a peptidase C1A papain C-terminal domain-containing protein with thiol endopeptidase and cysteine-type peptidase activity. The gene is associated with proteolysis and programmed cell death involved in cell development, as well as leaf senescence. It has been connected to responses to the hormones gibberellin, ethylene, and abscisic acid, and to nitrogen oxide storage. The encoded protein localises to senescence-associated vacuoles, protein storage vacuoles, lysosomes, cytoplasmic vesicles, the ER lumen, and aleurone bodies. Studies of related genes in other species link the family to similar cysteine proteinase functions.