AAT1 — Zea mays

Summary

ZM00001EB052860 (AAT1, also known as Cat2) on maize chromosome 1 encodes a basic amino acid permease with transmembrane transporter activity, belonging to the AA/rel_permease1 family. The gene is associated with L-arginine import, basic amino acid transport, and cellular amino acid homeostasis. In maize, Cat2 has been linked to osmotic stress and abscisic acid responses. The gene is also connected to numerous agronomic traits, including grain number, grain yield, ear length, plant height, root length, leaf chlorophyll content, carotenoid content, anthocyanin content, proline content, and tolerance to salinity, heat, and low temperature stress. Additional associations include brittle endosperm, seed growth and development, germination rate, oxidative stress response, and plant color. Related genes in other species link the family to hydrogen peroxide detoxification, abiotic stress response, and pathogen resistance.