CEP1 — Asparagus officinalis

Summary

A4U43_C05F31050, designated CEP1 in asparagus (Asparagus officinalis) on chromosome 5, encodes a papain-like cysteine peptidase belonging to the peptidase C1A family. The product possesses thiol endopeptidase and cysteine-type peptidase activity and is associated with proteinase-activated receptor binding. The protein has been linked to proteolysis, programmed cell death involved in cell development, and NO storage. It localises to the vacuole, lysosome, aleurone body, cytoplasmic vesicle, ER lumen, and plasmalemma. Studies of related genes in other species connect the family to additional cysteine endopeptidase functions, including activities classified under EC 3.4.22.25 and 3.4.22.6.