4D9S

Crystal structure of Arabidopsis thaliana UVR8 (UV Resistance locus 8)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.701 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.160 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Plant UVR8 Photoreceptor Senses UV-B by Tryptophan-Mediated Disruption of Cross-Dimer Salt Bridges.

Christie, J.M.Arvai, A.S.Baxter, K.J.Heilmann, M.Pratt, A.J.O'Hara, A.Kelly, S.M.Hothorn, M.Smith, B.O.Hitomi, K.Jenkins, G.I.Getzoff, E.D.

(2012) Science 335: 1492-1496

  • DOI: 10.1126/science.1218091

  • PubMed Abstract: 
  • The recently identified plant photoreceptor UVR8 (UV RESISTANCE LOCUS 8) triggers regulatory changes in gene expression in response to ultraviolet-B (UV-B) light through an unknown mechanism. Here, crystallographic and solution structures of the UVR8 ...

    The recently identified plant photoreceptor UVR8 (UV RESISTANCE LOCUS 8) triggers regulatory changes in gene expression in response to ultraviolet-B (UV-B) light through an unknown mechanism. Here, crystallographic and solution structures of the UVR8 homodimer, together with mutagenesis and far-UV circular dichroism spectroscopy, reveal its mechanisms for UV-B perception and signal transduction. β-propeller subunits form a remarkable, tryptophan-dominated, dimer interface stitched together by a complex salt-bridge network. Salt-bridging arginines flank the excitonically coupled cross-dimer tryptophan "pyramid" responsible for UV-B sensing. Photoreception reversibly disrupts salt bridges, triggering dimer dissociation and signal initiation. Mutation of a single tryptophan to phenylalanine retunes the photoreceptor to detect UV-C wavelengths. Our analyses establish how UVR8 functions as a photoreceptor without a prosthetic chromophore to promote plant development and survival in sunlight.


    Organizational Affiliation

    Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UVB-resistance protein UVR8
A, B
406Arabidopsis 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: 1.701 Å
  • R-Value Free: 0.194 
  • R-Value Work: 0.160 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 68.117α = 90.00
b = 51.511β = 102.89
c = 97.084γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-04-04
    Type: Initial release