GTG1 — Oryza sativa Japonica

Summary

OS04G0600800, designated GTG1 and also known as COLD1, encodes a protein with a GPHR/GTG domain and an ABA_GPCR_dom, possessing GTPase activity, GTP binding, abscisic acid binding, GTPase inhibitor activity, channel regulator activity, and protein binding. In rice, this gene is directly associated with chilling tolerance. It is linked to cellular response to cold, membrane organization, thylakoid membrane organization, reactive oxygen species metabolism, glutathione metabolism, and the GPCR signaling pathway. The protein localizes to the plasma membrane, heterotrimeric G-protein complex, endoplasmic reticulum membrane, plasmodesma, mitochondria, and cytoplasm. Associations also connect GTG1 to grain yield, grain size, seed yield, cold tolerance, salt tolerance, disease tolerance, nitrate sensitivity, UV light sensitivity, jasmonic acid sensitivity, stomatal closure, and root length. Studies of related genes in other species link the GTG family to ABA perception and G-protein signaling.