GGT1 — Daucus carota subsp. sativus

Summary

DCAR_007059 (DcGGT1) on carrot chromosome 2 encodes a pyridoxal phosphate-dependent aminotransferase with glutamate-glyoxylate and alanine-glyoxylate transaminase activities, as well as nicotianamine aminotransferase and ACC synthase activities. The gene is associated with photorespiration, amino acid metabolism, ethylene biosynthesis, and responses to hypoxia and fruit ripening. Its product localizes to multiple cellular compartments including the amyloplast membrane, chloroplast stroma, mitochondria, and cytosol. DcGGT1 is associated with seed germination, root elongation, flowering time, senescence, seed yield, plant growth and size, oxidative stress tolerance, disease resistance, trichome development, and proline and hydrogen peroxide accumulation. Studies of related genes in other species connect the family to glutathione catabolism, UV-B stress response, and virus resistance.