AAT1 — Zea mays

Summary

ZM00001EB222840 (AAT1, also known as CAT2–CAT6 and CAT10–CAT11) on maize chromosome 5 encodes a cationic amino acid transporter with basic amino acid permease activity, localised to the tonoplast, plasma membrane, endoplasmic reticulum, mitochondria and nuclear envelope. The gene is associated with osmotic stress and abscisic acid responses, and with traits including grain number, grain yield, ear length, plant height, leaf chlorophyll and carotenoid content, anthocyanin and proline content, brittle endosperm, plant colour, germination rate, root length, and tolerance to salt, heat, drought and cold. It is linked to DHN-melanin biosynthesis, toxin and siderophore anabolism, nitrogen fixation, gluconeogenesis, PTGS, regeneration, vision, and amino acid homeostasis and transport. Studies of related genes in other species link the family to vacuolar amino acid transport, photorespiratory stress tolerance, pathogen resistance, and developmental senescence.