UVR8 | Ultraviolet-B receptor UVR8

UVR8 (Ultraviolet-B receptor UVR8) is a signal transduction component with the function of UV-B photoreceptor and plays a key role in the establishment of anti-ultraviolet response in plants. Under UV-B irradiation, UVR8 immediately transforms from a homodimer to a monomer, accumulates in the nucleus, interacts with the photomorphogenetic inhibitor COP1, and regulates expression of the transcription factor HY5 by binding to chromatin in the HY5 promoter region (via histone H2B binding). Participation in controlling leaf growth and morphogenesis to UV-B is necessary for the normal process of internal circulation, has a regulatory role in stomatal differentiation, and is necessary for the biological clock response of plants to UV-B photomorphogenesis. Promote photosynthetic efficiency when UV-B levels are elevated. It plays a regulatory role in the effect of UV-B radiation on pathogen resistance by regulating the expression of sinapate biosynthesis pathway. Alternative name: contains RCC1 domain protein UVR8, anti-UV-B protein 8.