GTG1 — Sorghum bicolor

Summary

SORBI_3006G203300 (SbGTG1) on sorghum chromosome 6 encodes an abscisic acid G-protein coupled receptor-like domain-containing protein with GTPase activity, GTP binding, abscisic acid binding, and channel regulator activity. This gene is associated with cellular response to cold, regulation of stomatal closure and movement, blue light signaling, reactive oxygen species metabolism, membrane and thylakoid organization, and the transition from vegetative to reproductive phase. It localizes to the plasma membrane, endoplasmic reticulum, plasmodesmata, mitochondria, and heterotrimeric G-protein complex. SbGTG1 is linked to seed yield, germination rate, root length and thickness, seedling growth, fruit and tissue development, nitrate sensitivity and uptake, anthocyanin content, jasmonic acid sensitivity, and responses to high and low temperature stress, UV light, and disease. Studies of related genes in other species connect the family to ABA perception, G-protein signaling, hypocotyl elongation, and blue light-induced phenylalanine production.