AGB1 — Arabidopsis thaliana

Summary

AT4G34460 (AGB1, also known as ELK4) in Arabidopsis thaliana encodes a G-protein beta subunit containing WD40 repeat domains, and is annotated with acireductone dioxygenase, MAPK binding, phospholipase D, and GTPase activities. The gene is associated with heterotrimeric G-protein complex localization and has been linked to abscisic acid signaling, protein ubiquitination, and nonhost resistance to Magnaporthe oryzae and Plectosphaerella cucumerina. AGB1 is associated with diverse traits including grain size, seed quality, root width, stem number, leaf water potential, phosphate content, UV light sensitivity, and bacterial and viral disease responses. It is also associated with root growth inhibition by nitrate, auxin transport, meristem initiation, and regulation of seed size. Related genes in other species are linked to non-host resistance to Magnaporthe oryzae and microtubule stability.