AAT1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.1HG0037780 (symbol AAT1, also known as Cat2) on barley chromosome 1H encodes a basic amino acid permease with activity transporting L-lysine, L-glutamate and other amino acids. The protein localises to the tonoplast, endoplasmic reticulum, mitochondria, nuclear envelope and plasma membrane. It is associated with amino acid transport and homeostasis, amylase release, secretion, and response to nematodes. The gene has been connected to seed growth and development, leaf senescence, stomatal closure and development, drought, cold, salt and oxidative stress tolerance, seed dormancy and germination, hydrogen peroxide accumulation and scavenging, reactive oxygen species homeostasis, circadian rhythm, light response, jasmonic acid biosynthesis, auxin accumulation, pathogen resistance, and programmed cell death. Studies of related genes in other species link the family to photorespiratory stress tolerance, vacuolar amino acid transport, and hypersensitive cell death.