AAT1 — Triticum turgidum subsp. durum

Summary

TRITD5AV1G095620 (symbol AAT1, also known as CAT2–CAT5 and TtCAT1–TtCAT7) on durum wheat chromosome 5A encodes a basic amino acid permease with L-lysine, L-glutamate and general amino acid transmembrane transporter activity. The gene is associated with L-arginine import, cellular amino acid homeostasis, H₂O₂ biosynthesis, and response to nematodes. Its product localises to the tonoplast, endoplasmic reticulum, mitochondria, nuclear envelope and plasma membrane. AAT1 is associated with leaf senescence, stomatal closure and development, drought, cold, salt and oxidative stress tolerance, seed dormancy and germination, circadian rhythm, hydrogen peroxide accumulation and scavenging, reactive oxygen species homeostasis, jasmonic acid biosynthesis, auxin accumulation, pathogen resistance, and seedling and root growth. Studies of related genes in other species connect the family to vacuolar amino acid transport, photorespiratory and high-light stress tolerance, and seed germination under low temperature.