PSD2 — Pisum sativum

Summary

PSAT1G218440, designated PSD2 (also known as PSD3, PsPSD3, PsPSD2) on garden pea chromosome 1LG6, encodes a phosphatidylserine decarboxylase (EC 4.1.1.65) with calcium ion binding activity. The protein contains PSD_type2_pro, C2, and EF-hand domains, and is associated with protein autoprocessing, biofilm formation, and phosphatidylethanolamine and phospholipid anabolism. It localizes to multiple membranes including the vacuolar membrane, mitochondrial inner membrane, endoplasmic reticulum, and tonoplast, as well as the cytosol and cytoplasm. The gene is linked to pathways for phosphatidylserine decarboxylation and phospholipid biosynthesis. Associations include quantum yield and phosphatidylethanolamine biosynthesis. Studies of related genes in other species connect the family to oxidative stress response and photochemical quenching, though these are not established for pea PSD2 itself.