AAT1 — Triticum turgidum subsp. durum

Summary

TRITD4BV1G003460 (symbol AAT1) on durum wheat chromosome 4B encodes a basic amino acid permease with activity transporting L-lysine, L-glutamate and other amino acids across membranes. The protein contains a CAT_C domain and an AA/rel_permease1 domain, and is localised to the tonoplast, endoplasmic reticulum, mitochondria, nuclear envelope and plasmalemma. The gene is associated with cellular amino acid homeostasis, L-arginine import, hydrogen peroxide biosynthesis, and response to nematodes. Phenotype associations link AAT1 to leaf senescence, stomatal closure and development, drought, cold and salt tolerance, seed dormancy and germination, oxidative stress tolerance, 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 stress tolerance, hypersensitive cell death, and abiotic stress responses.