6XZL

Arabidopsis UV-B photoreceptor UVR8 mutant D96N D107N


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.39 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.146 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

A constitutively monomeric UVR8 photoreceptor confers enhanced UV-B photomorphogenesis.

Podolec, R.Lau, K.Wagnon, T.B.Hothorn, M.Ulm, R.

(2021) Proc Natl Acad Sci U S A 118

  • DOI: 10.1073/pnas.2017284118
  • Primary Citation of Related Structures:  
    6XZL, 6XZM, 6XZN

  • PubMed Abstract: 
  • The plant ultraviolet-B (UV-B) photoreceptor UVR8 plays an important role in UV-B acclimation and survival. UV-B absorption by homodimeric UVR8 induces its monomerization and interaction with the E3 ubiquitin ligase COP1, leading ultimately to gene expression changes ...

    The plant ultraviolet-B (UV-B) photoreceptor UVR8 plays an important role in UV-B acclimation and survival. UV-B absorption by homodimeric UVR8 induces its monomerization and interaction with the E3 ubiquitin ligase COP1, leading ultimately to gene expression changes. UVR8 is inactivated through redimerization, facilitated by RUP1 and RUP2. Here, we describe a semidominant, hyperactive allele, namely uvr8-17D , that harbors a glycine-101 to serine mutation. UVR8 G101S overexpression led to weak constitutive photomorphogenesis and extreme UV-B responsiveness. UVR8 G101S was observed to be predominantly monomeric in vivo and, once activated by UV-B, was not efficiently inactivated. Analysis of a UVR8 crystal structure containing the G101S mutation revealed the distortion of a loop region normally involved in stabilization of the UVR8 homodimer. Plants expressing a UVR8 variant combining G101S with the previously described W285A mutation exhibited robust constitutive photomorphogenesis. This work provides further insight into UVR8 activation and inactivation mechanisms and describes a genetic tool for the manipulation of photomorphogenic responses.


    Organizational Affiliation

    Institute of Genetics and Genomics of Geneva, University of Geneva, CH-1211 Geneva 4, Switzerland.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ultraviolet-B receptor UVR8A373Arabidopsis thalianaMutation(s): 2 
Gene Names: UVR8At5g63860MGI19.7
UniProt
Find proteins for Q9FN03 (Arabidopsis thaliana)
Explore Q9FN03 
Go to UniProtKB:  Q9FN03
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
B [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
MLY
Query on MLY
AL-PEPTIDE LINKINGC8 H18 N2 O2LYS
MLZ
Query on MLZ
AL-PEPTIDE LINKINGC7 H16 N2 O2LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.39 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.146 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 97.614α = 90
b = 50.98β = 104.948
c = 70.488γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data

  • Deposited Date: 2020-02-04 
  • Released Date: 2021-01-13 
  • Deposition Author(s): Lau, K., Hothorn, M.

Funding OrganizationLocationGrant Number
Swiss National Science FoundationSwitzerland31003A_175774
European Research Council (ERC)Switzerland310539

Revision History  (Full details and data files)

  • Version 1.0: 2021-01-13
    Type: Initial release
  • Version 1.1: 2021-07-28
    Changes: Database references