SAT1 — Daucus carota subsp. sativus

Summary

DCAR_017087 (SAT1) on carrot chromosome 5 encodes a serine acetyltransferase, an enzyme with L-serine O-acetyltransferase and cysteine synthase activities, and also possesses cis-trans proline isomerase activity. The gene is associated with sulfate assimilation, cysteine biosynthesis, and anthocyanin metabolism, including regulation of anthocyanin biosynthesis and acylation. SAT1 is linked to pigmentation, responses to light intensity, oxidative stress, salinity, cadmium, and zinc, as well as pollen tube development, leaf senescence, and flowering time. It localizes to chloroplast thylakoid and envelope, endosomes, and the apoplast. Associations with sulfur content, cadmium concentration, submergence tolerance, aphid response, trichome morphology, seed development, and disease tolerance have been noted. Studies of related genes in other species link the SAT1 family to seed methionine content, cadmium and chromium tolerance, and phytosterol ester biosynthesis.