GGT1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.1HG0019260 (symbol GGT1, also known as AlaAT1) on barley chromosome 1H encodes a pyridoxal-phosphate-dependent aminotransferase with alanine-glyoxylate and glutamate-glyoxylate transaminase activities. The gene is associated with photorespiration, L-alanine and tyrosine breakdown, ethylene anabolism, and responses to cadmium and hypoxia. In barley, ALAAT1 has been linked to pre-harvest sprouting and hypoxia sensitivity. Broader associations include grain filling period, photosynthetic rate, seed dormancy, seed yield, plant growth, root elongation, flowering time, senescence, and stress and disease resistance. The protein localises to multiple compartments including the amyloplast membrane, chloroplast stroma, mitochondria, cytosol, and nucleus. Studies of related genes in other species connect the family to nitrogen metabolism, grain yield and quality, starch synthesis, drought tolerance, and submergence tolerance.