GLN — Lactuca sativa

Summary

LsGLN (LSAT_V11C500257110) on lettuce chromosome 5 encodes a glutamine synthetase. It is associated with glutamine synthetase activity and also with diverse molecular functions including glutamate-tRNA ligase, histone acetyltransferase, and salicylic acid binding activities. The gene is linked to nitrogen fixation, the ammonia assimilation cycle, nitrate assimilation, chlorophyll metabolism, auxin metabolism, and responses to cadmium and blue light. Associations with agronomically important traits include plant dry weight, nitrogen content, net photosynthetic rate, stomatal resistance, leaf senescence, root length, flowering time, seed yield, and seed germination. The encoded protein is predicted to localize to the chloroplast thylakoid membrane, chloroplast stroma, and plastid, among other compartments. Studies of related glutamine synthetase genes in other species connect the family to nitrogen assimilation, senescence, biomass, and stress tolerance.