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Perception of UV-B by the Arabidopsis UVR8 protein

Rizzini, Luca
Favory, Jean-Jacques
Cloix, Catherine
Faggionato, Davide
O'Hara, Andrew
Kaiserli, Eirini
Baumeister, Ralf
Schäfer, Eberhard
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Published in Science. 2011, vol. 332, no. 6025, p. 103-106
Abstract 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.
Keywords ArabidopsisArabidopsis Proteins/radiation effectsChromosomal Proteins, Non-Histone/radiation effectsLight Signal TransductionPhotoreceptors, Plant/physiologySunlightTwo-Hybrid System TechniquesUltraviolet Rays
PMID: 21454788
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Other version: http://www.sciencemag.org/content/332/6025/103.full
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RIZZINI, Luca et al. Perception of UV-B by the Arabidopsis UVR8 protein. In: Science, 2011, vol. 332, n° 6025, p. 103-106. https://archive-ouverte.unige.ch/unige:19288

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Deposited on : 2012-03-29

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