4DNW

Crystal structure of UVB-resistance protein UVR8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.773 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.171 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis of ultraviolet-B perception by UVR8.

Wu, D.Hu, Q.Yan, Z.Chen, W.Yan, C.Huang, X.Zhang, J.Yang, P.Deng, H.Wang, J.Deng, X.Shi, Y.

(2012) Nature 484: 214-219

  • DOI: 10.1038/nature10931
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The Arabidopsis thaliana protein UVR8 is a photoreceptor for ultraviolet-B. Upon ultraviolet-B irradiation, UVR8 undergoes an immediate switch from homodimer to monomer, which triggers a signalling pathway for ultraviolet protection. The mechanism by ...

    The Arabidopsis thaliana protein UVR8 is a photoreceptor for ultraviolet-B. Upon ultraviolet-B irradiation, UVR8 undergoes an immediate switch from homodimer to monomer, which triggers a signalling pathway for ultraviolet protection. The mechanism by which UVR8 senses ultraviolet-B remains largely unknown. Here we report the crystal structure of UVR8 at 1.8 Å resolution, revealing a symmetric homodimer of seven-bladed β-propeller that is devoid of any external cofactor as the chromophore. Arginine residues that stabilize the homodimeric interface, principally Arg 286 and Arg 338, make elaborate intramolecular cation-π interactions with surrounding tryptophan amino acids. Two of these tryptophans, Trp 285 and Trp 233, collectively serve as the ultraviolet-B chromophore. Our structural and biochemical analyses identify the molecular mechanism for UVR8-mediated ultraviolet-B perception, in which ultraviolet-B radiation results in destabilization of the intramolecular cation-π interactions, causing disruption of the critical intermolecular hydrogen bonds mediated by Arg 286 and Arg 338 and subsequent dissociation of the UVR8 homodimer.


    Organizational Affiliation

    Tsinghua-Peking Center for Life Sciences, Center for Structural Biology, School of Life Sciences and School of Medicine, Tsinghua University, Beijing 100084, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AT5g63860/MGI19_6
A, B
374Arabidopsis thalianaMutation(s): 0 
Gene Names: UVR8
Find proteins for Q9FN03 (Arabidopsis thaliana)
Go to UniProtKB:  Q9FN03
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.773 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.171 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 120.646α = 90.00
b = 61.517β = 118.00
c = 103.167γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
HKL-2000data scaling
CBASSdata collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-03-07
    Type: Initial release
  • Version 1.1: 2012-04-18
    Type: Database references
  • Version 1.2: 2013-07-17
    Type: Database references