GLN — Nicotiana attenuata

Summary

A4A49_13682 (GLN2) on chromosome 3 of coyote tobacco encodes a glutamine synthetase (EC 6.3.1.2). The product belongs to the glutamine synthetase catalytic domain family and is annotated with glutamine synthetase activity, as well as glutamate-tRNA ligase, histone acetyltransferase, and SUMO transferase activities. GLN2 is associated with nitrate assimilation, the ammonia assimilation cycle, glutamine biosynthesis, leaf senescence and development, response to water and cadmium, blue light response, and regulation of gene expression. It localises to the chloroplast thylakoid membrane, stroma, and envelope, as well as the apoplast and plant-type cell wall. The gene is linked to traits including photosynthetic rate, chlorophyll content, root dry weight, flowering time, protein content, and proline content, and to phenotypes such as nitrogen remobilisation, ammonium homeostasis, seed germination, and salt stress response.