AUR3 — Oryza sativa Japonica

Summary

OsAUR3 (also known as OsGH3.11, OsGH3.12, VAS2, and other synonyms) on rice chromosome 5 encodes a GH3 family protein with IAA amido synthetase and JA-amino synthetase activities, and is associated with adenylyltransferase activity. The gene is associated with defense responses, abscisic acid signaling, mycorrhizal symbiosis, seed and crown root development, dwarfism, drought tolerance, and broad-spectrum disease resistance in rice. It has been linked to jasmonic acid conjugation, flower development, wound stress response, and resistance to blast and insects. Associations also include regulation of hormone anabolism, cellular auxin homeostasis, camalexin anabolism, and responses to red/far-red light, arsenic, and mycotoxins. The protein localizes to the cytosol, plasmalemma, chloroplast envelope, vacuole, mitochondria, and nuclear ubiquitin ligase complexes. Studies of related genes in other species connect the family to auxin and salicylic acid homeostasis, pathogen defense, root growth, and light signaling.