GGT1 — Daucus carota subsp. sativus

Summary

DCAR_031149 (GGT1) on carrot chromosome 9 encodes a pyridoxal phosphate-dependent aminotransferase of the ALAT1/2-like family, with glutamate-glyoxylate and alanine-glyoxylate transaminase activities, among other aminotransferase functions. The gene is associated with photorespiration, amino acid metabolism, ethylene anabolism, and fruit ripening, as well as response to hypoxia. Phenotypic associations include photorespiratory carbon recycling, hydrogen peroxide and proline accumulation, seed germination, root elongation, flowering time, senescence, seed yield, and disease resistance. The encoded protein localises to multiple compartments including the amyloplast membrane, chloroplast stroma, mitochondria, cytosol, and nucleus. Studies of related genes in other species link the family to glutathione catabolism, UV-B stress response, and virus resistance.