PSY — Cucumis melo

Summary

MELO3C025102.2 (PSY, PSY1) on melon chromosome 10 encodes a protein with domains including Trans_IPPS_bact-type, Trans_IPPS_HH, Squalene/phytoene_synthase_CS, Squ/phyt_synthse, and Isoprenoid_synthase_dom_sf, and has EC 2.5.1.32 activity, also annotated for squalene synthase, dimethylallyltransferase and farnesyltranstransferase activities. The gene is associated with carotenoid anabolism and metabolism, fruit ripening, chromoplast organization, de-etiolation, response to light stimulus, and embryo development. It is linked to fruit carotenoid content and color, abscisic acid production, drought tolerance, and chloroplast development traits. Localization evidence connects the product to plastids, chromoplast stroma, etioplasts, mitochondria, cytosol and nucleus. Related genes in other species link the family to plastid biogenesis, fruit pigmentation and lycopene biosynthesis.