Perception of UV-B by the Arabidopsis UVR8 Protein

@article{Rizzini2011PerceptionOU,
  title={Perception of UV-B by the Arabidopsis UVR8 Protein},
  author={Luca Rizzini and Jean-Jacques Favory and Catherine Cloix and Davide Faggionato and Andrew O'Hara and Eirini Kaiserli and Ralf Baumeister and Eberhard Schäfer and Ferenc Nagy and Gareth I. Jenkins and Roman Ulm},
  journal={Science},
  year={2011},
  volume={332},
  pages={103 - 106}
}
A plant ultraviolet-B photoreceptor uses a tryptophan-based chromophore. 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… 
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  • G. Jenkins
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    Current opinion in structural biology
  • 2014

Reversion of the Arabidopsis UV-B photoreceptor UVR8 to the homodimeric ground state

  • M. HeijdeR. Ulm
  • Biology
    Proceedings of the National Academy of Sciences
  • 2012
It is shown that UVR8 monomerization is reversible in vivo, restoring the homodimeric ground state and identifies a key role of RUP1- and RUP2-mediated U VR8 redimerization in photoreceptor inactivation, a crucial process that regenerates reactivatable UVR7 homodimers.
...

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