GS1 — Zea mays

Summary

ZmGS1 (ZM00001EB054990) on maize chromosome 1 encodes a glutamine synthetase (EC 6.3.1.2) with glutamine synthetase activity, alongside annotations for glutamate-tRNA ligase, histone acetyltransferase, SUMO transferase, and calmodulin binding activities. The gene is associated with nitrogen utilization, nitrate assimilation and metabolism, ammonia assimilation, and the TCA cycle, as well as ear development, auxin transport and biosynthesis, and developmental processes. It localizes to the chloroplast thylakoid membrane, envelope, and stroma, the apoplast, cell wall, and plasmodesmata. ZmGS1 is linked to grain yield, grain number, grain weight, harvest index, plant height, root dry weight, photosynthetic rate, leaf senescence, flowering time, and responses to salt and abscisic acid. Related genes in other species are linked to drought, salt, and osmotic stress tolerance, grain filling, and seedling vigour.