期刊
SCIENCE
卷 332, 期 6025, 页码 103-106出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1200660
关键词
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资金
- UK Biotechnology and Biological Sciences Research Council
- Leverhulme Trust
- Scottish Universities Life Science Alliance and the Hungarian Scientific Research Fund [OTKA-81399]
- Excellence Initiative of the German Federal and State Governments [EXC 294]
- Deutsche Forschungsgemeinschaft [UL341/1-1]
- [Sonderforschungsbereich (SFB) 592]
- [SFB 746]
- Biotechnology and Biological Sciences Research Council [BB/F014961/1] Funding Source: researchfish
- BBSRC [BB/F014961/1] Funding Source: UKRI
To optimize their growth and survival, plants perceive and respond to ultraviolet-B ( UV-B) radiation. However, neither the molecular identity of the UV-B photoreceptor nor the photoperception mechanism is known. Here we show that dimers of the UVR8 protein perceive UV-B, probably by a tryptophan-based mechanism. Absorption of UV-B induces instant monomerization of the photoreceptor and interaction with COP1, the central regulator of light signaling. Thereby this signaling cascade controlled by UVR8 mediates UV-B photomorphogenic responses securing plant acclimation and thus promotes survival in sunlight.
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