PSY — Cucumis melo

Summary

MELO3C014677.2 (PSY2) on melon chromosome 6 encodes a protein with squalene/phytoene synthase and isoprenoid synthase domains, exhibiting phytoene synthase, squalene synthase, dimethylallyltransferase, and farnesyltranstransferase activities. The gene is associated with carotenoid anabolism and metabolism, chromoplast and chloroplast organization, de-etiolation, response to light stimulus, embryo development ending in seed dormancy, and monoterpene biosynthesis. It is linked to fruit carotenoid content and color, fruit ripening, and abscisic acid synthesis. The encoded protein localizes to plastids, etioplasts, chromoplast stroma, chloroplast membrane, mitochondria, cytosol, and nucleus. Studies of related genes in other species connect the family to carotenoid pigmentation, fruit development, stress responses, and flowering time.