GGT1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.2HG0156760 (HvGGT1) on barley chromosome 2H encodes a pyridoxal phosphate-dependent aminotransferase with glutamate-glyoxylate and alanine-glyoxylate transaminase activities, belonging to the ALAT1/2-like family. The gene is associated with pre-harvest sprouting and hypoxia sensitivity in barley. It has been linked to photorespiration, L-alanine and tyrosine breakdown, ethylene anabolism, and responses to cadmium and hypoxia. Associations also include grain filling period, photosynthetic rate, seed dormancy, seed yield, plant growth, root elongation, flowering time, senescence, and stress and disease resistance. The encoded protein is predicted to localise to multiple compartments including the amyloplast membrane, chloroplast stroma, mitochondria, cytosol, and nucleus. Studies of related genes in other species link the family to photorespiratory carbon recycling, oxidative stress tolerance, and ABA sensitivity.