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- W2046064827 endingPage "e0164" @default.
- W2046064827 startingPage "e0164" @default.
- W2046064827 abstract "Ultraviolet-B radiation (UV-B) is an intrinsic part of sunlight that is accompanied by significant biological effects. Plants are able to perceive UV-B using the UV-B photoreceptor UVR8 which is linked to a specific molecular signaling pathway and leads to UV-B acclimation. Herein we review the biological process in plants from initial UV-B perception and signal transduction through to the known UV-B responses that promote survival in sunlight. The UVR8 UV-B photoreceptor exists as a homodimer that instantly monomerises upon UV-B absorption via specific intrinsic tryptophans which act as UV-B chromophores. The UVR8 monomer interacts with COP1, an E3 ubiquitin ligase, initiating a molecular signaling pathway that leads to gene expression changes. This signaling output leads to UVR8-dependent responses including UV-B-induced photomorphogenesis and the accumulation of UV-B-absorbing flavonols. Negative feedback regulation of the pathway is provided by the WD40-repeat proteins RUP1 and RUP2, which facilitate UVR8 redimerization, disrupting the UVR8-COP1 interaction. Despite rapid advancements in the field of recent years, further components of UVR8 UV-B signaling are constantly emerging, and the precise interplay of these and the established players UVR8, COP1, RUP1, RUP2 and HY5 needs to be defined. UVR8 UV-B signaling represents our further understanding of how plants are able to sense their light environment and adjust their growth accordingly." @default.
- W2046064827 created "2016-06-24" @default.
- W2046064827 creator A5024858348 @default.
- W2046064827 creator A5046270365 @default.
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- W2046064827 creator A5060917610 @default.
- W2046064827 creator A5061177927 @default.
- W2046064827 creator A5064043025 @default.
- W2046064827 date "2013-01-01" @default.
- W2046064827 modified "2023-10-14" @default.
- W2046064827 title "The UVR8 UV-B Photoreceptor: Perception, Signaling and Response" @default.
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