FAD3 — Arabidopsis thaliana

Summary

AT2G29980, designated FAD3, encodes a fatty acid desaturase family protein containing a FAS_N domain, with acyl-lipid omega-3 desaturase (cytochrome b5) activity and EC 1.14.19.25. In Arabidopsis, FAD3 is associated with linoleic and linolenic acid content, fatty acid composition, polyunsaturated hydroxy fatty acid synthesis, and lipid microdomain formation. The gene is linked to alpha-linolenic acid content, jasmonic acid content, xanthophyll content, chlorophyll content, photosynthetic rate, quantum yield, photochemical quenching, respiration rate, stomatal resistance, temperature stress response, aphid response, flower development, seed maturation, disease tolerance, and plant growth and development. FAD3 localizes to the ER membrane, plastid membrane, chloroplast envelope, and cytosol, and is associated with membrane biogenesis, unsaturated fatty acid anabolism, lipogenesis, the xanthophyll cycle, and gibberellin biosynthesis.