ALB3 — Pisum sativum

Summary

PSAT7G218800 (PsALB3) on garden pea chromosome 7LG7 encodes the inner membrane protein PPF-1, a member of the YidC/ALB3/OXA1/COX18 family with membrane insertase, signal sequence receptor, dolichyl-phosphate beta-glucosyltransferase, GTPase, ATP hydrolase, 7S RNA binding, and protein binding activities. The gene is associated with protein-membrane insertion, SRP-dependent cotranslational membrane targeting, protein localization to chloroplast, thylakoid membrane organization, photosynthetic electron transport in photosystem II, response to high light intensity, embryogenesis, vesicle organization, and oligosaccharide-PP-dolichol assembly. It localizes to the chloroplast thylakoid membrane, chloroplast envelope, ER membrane, and signal recognition particle. PsALB3 is linked to leaf color, chlorophyll content, starch content, chloroplast development, high temperature stress response, root morphology, and phenotypes including extreme chlorosis, reduced chlorophyll levels, altered thylakoid membranes, and increased salt sensitivity. Studies of related genes in other species connect the family to thylakoid biogenesis, carotenoid accumulation, and chlorophyll biosynthesis.