GS1 — Triticum turgidum subsp. durum

Summary

TRITD4BV1G013920 (GS1) on durum wheat chromosome 4B encodes a glutamine synthetase (EC 6.3.1.2) and is also annotated with glutamyl-tRNA ligase, histone acetyltransferase, SUMO transferase, and calmodulin-binding activities. The gene is associated with nitrogen metabolism, leaf senescence, response to abscisic acid, blue light response, and negative regulation of cellulose anabolism. It has been linked to grain protein content, grain weight, grain filling period, starch grain synthesis, photosynthetic rate, stomatal opening, and flowering time traits. Localisation evidence connects the product to the thylakoid, chloroplast envelope, stroma, apoplast, plasmodesma, and plant-type vacuole. Related genes in other species are linked to nitrogen remobilisation, seed yield, root development, ammonium homeostasis, and tolerance to drought and salt stress.