UVR8 — Arabidopsis thaliana

Summary

AT5G63860, known as UVR8, encodes a protein with RCC1/BLIP-II and ubiquitin ligase domains and has photoreceptor activity. In Arabidopsis thaliana, UVR8 is associated with UV-B perception, photomorphogenesis, acclimation, and stress responses, as well as hypocotyl growth, cotyledon expansion, lateral root development, circadian clock entrainment, osmotic stress tolerance, and pathogen resistance. The protein localises to the nucleus, chromatin, and nuclear bodies, and is linked to processes including stress-activated MAPK cascades, thermomorphogenesis, pigment accumulation, auxin signalling, and gibberellin catabolism. Associations with yield, seed viability, inflorescence height, leaf morphology, flowering time, and responses to far-red, red, blue, and UV light have also been noted. Studies of related genes in other species link the UVR8 family to plant height, shoot fresh weight, and stomatal resistance.