GS1 — Triticum turgidum subsp. durum

Summary

TRITD6AV1G185050 (GS1, TtGS1) on durum wheat chromosome 6A encodes a protein with a Gln_synt_N domain and a catalytic domain, and is annotated with glutamine synthetase activity (EC 6.3.1.2) as well as several other molecular functions including glutamate-tRNA ligase activity, histone acetyltransferase activity, and SUMO transferase activity. The gene is associated with nitrogen metabolism, the ammonia assimilation cycle, nitrate assimilation, and glutamine synthesis. It has been linked to grain protein content, grain weight, grain size, grain filling period, leaf senescence, photosynthetic rate, starch grain synthesis, and flowering time. Associations also include responses to abscisic acid, cadmium, and blue light, as well as embryo development, sumoylation, and regulation of gene expression. The product localises to the chloroplast thylakoid membrane, chloroplast envelope, stroma, apoplast, plant-type cell wall, and plasmodesmata. Studies of related genes in other species link the family to grain nitrogen content, spikelet weight, seedling vigour, drought and salt stress tolerance, and nitrogen remobilisation.