AAT — Zea mays

Summary

ZM00001EB314710 (ZmAAT, also known as ZmVAS1, ZmPAT, ZmISS1) on maize chromosome 7 encodes a pyridoxal phosphate-dependent aminotransferase with multiple annotated activities including kynurenine-oxoglutarate, methionine-oxo-acid, L-glutamate:prephenate, L-aspartate:prephenate, nicotianamine, L-tyrosine-2-oxoglutarate, L-aspartate:2-oxoglutarate, and 1-aminocyclopropane-1-carboxylate synthase activities. The gene is associated with auxin and ethylene biosynthesis, negative regulation of ethylene biosynthesis, aromatic amino acid biosynthesis and homeostasis, tryptophan homeostasis, indole-3-acetic acid production, carotenoid and phenylalanine anabolism, tyrosine breakdown, methionine metabolism, shade avoidance, fruit ripening, shoot regeneration, and regulation of growth. It has been linked to grain yield, plant height, leaf angle, days to maturity, seedling vigor, carotenoid content, insect damage, and IAA content. The protein localises to chloroplast stroma, mitochondria, and cytosol. Studies of related genes in other species connect the family to grain protein content, drought tolerance, and salinity stress response.