SAT1 — Daucus carota subsp. sativus

Summary

DCAR_013222 (SAT1) on carrot chromosome 4 encodes a serine acetyltransferase, an enzyme with L-serine O-acetyltransferase and cysteine synthase activities. The gene is associated with cysteine biosynthesis, sulfate assimilation, and anthocyanin biosynthesis and acylation. It has been linked to pigmentation, responses to light intensity, oxidative stress, salinity, cadmium, zinc, and mannitol, as well as pollen tube development, double fertilization, and negative regulation of leaf senescence. Associations with sulfur content, submergence tolerance, cadmium concentration, aphid response, trichome morphology, flowering time, disease tolerance, and seed and plant growth traits have been noted. The product localizes to multiple cellular compartments including the thylakoid, chloroplast envelope and stroma, endosome, and apoplast. Studies of related genes in other species link the family to cysteine and glutathione content, seed methionine accumulation, and cadmium and chromium stress tolerance.