GGT1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.5HG0433990 (HvGGT1) on barley chromosome 5H encodes a pyridoxal phosphate-dependent aminotransferase with glutamate-glyoxylate, alanine-glyoxylate, nicotianamine, L-alanine:2-oxoglutarate and L-tyrosine-2-oxoglutarate transaminase activities, classified as EC 2.6.1.2. The gene is associated with photorespiration, L-alanine and tyrosine breakdown, ethylene anabolism, and responses to cadmium, hypoxia and pre-harvest sprouting. HvGGT1 has been linked to grain filling period, photosynthetic rate, seed dormancy, seed yield, plant growth, root elongation, flowering time, senescence, and hypoxia and oxidative stress tolerance. The protein localises to multiple compartments including the amyloplast membrane, chloroplast stroma, mitochondria, cytosol and nucleus. Related genes in other species connect the family to virus resistance and UV-B stress responses, grain yield, nitrogen utilisation and starch synthesis.