AAT1 — Zea mays

Summary

ZM00001EB120240 (ZmAAT1, also known as CAT2–CAT6 and CAT10–CAT11) on maize chromosome 3 encodes a basic amino acid permease with L-lysine, L-glutamate and general amino acid transmembrane transporter activity, belonging to the AA/rel_permease1 and CAT_C domain families. The gene is associated with osmotic stress response, abscisic acid response, and salt response, and is linked to drought tolerance, cold tolerance, seed germination, leaf senescence, stomatal development, hydrogen peroxide accumulation and scavenging, programmed cell death, circadian rhythm, and resistance to pathogens including Pseudomonas syringae and Colletotrichum higginsianum. It has been linked to grain yield, ear length, plant height, root length, leaf chlorophyll and carotenoid content, anthocyanin and proline content, brittle endosperm, and heat and salinity tolerance. The encoded protein localises to the plasma membrane, tonoplast, endoplasmic reticulum, mitochondria and nuclear envelope. Related genes in other species are associated with photorespiratory stress tolerance, vacuolar amino acid transport, and high-light stress tolerance.