8GQE

Crystal structure of the W285A mutant of UVR8 in complex with RUP2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

RUP2 facilitates UVR8 redimerization via two interfaces.

Wang, L.Wang, Y.Chang, H.Ren, H.Wu, X.Wen, J.Guan, Z.Ma, L.Qiu, L.Yan, J.Zhang, D.Huang, X.Yin, P.

(2023) Plant Commun 4: 100428-100428

  • DOI: https://doi.org/10.1016/j.xplc.2022.100428
  • Primary Citation of Related Structures:  
    8GQE

  • PubMed Abstract: 

    The plant UV-B photoreceptor UV RESISTANCE LOCUS 8 (UVR8) exists as a homodimer in its inactive ground state. Upon UV-B exposure, UVR8 monomerizes and interacts with a downstream key regulator, the CONSTITUTIVE PHOTOMORPHOGENIC 1/SUPPRESSOR OF PHYA (COP1/SPA) E3 ubiquitin ligase complex, to initiate UV-B signaling. Two WD40 proteins, REPRESSOR OF UV-B PHOTOMORPHOGENESIS 1 (RUP1) and RUP2 directly interact with monomeric UVR8 and facilitate UVR8 ground state reversion, completing the UVR8 photocycle. Here, we reconstituted the RUP-mediated UVR8 redimerization process in vitro and reported the structure of the RUP2-UVR8 W285A complex (2.0 Å). RUP2 and UVR8 W285A formed a heterodimer via two distinct interfaces, designated Interface 1 and 2. The previously characterized Interface 1 is found between the RUP2 WD40 domain and the UVR8 C27 subregion. The newly identified Interface 2 is formed through interactions between the RUP2 WD40 domain and the UVR8 core domain. Disruption of Interface 2 impaired UV-B induced photomorphogenic development in Arabidopsis thaliana. Further biochemical analysis indicated that both interfaces are important for RUP2-UVR8 interactions and RUP2-mediated facilitation of UVR8 redimerization. Our findings suggest that the two-interface-interaction mode is adopted by both RUP2 and COP1 when they interact with UVR8, marking a step forward in understanding the molecular basis that underpins the interactions between UVR8 and its photocycle regulators.


  • Organizational Affiliation

    National Key Laboratory of Crop Genetic Improvement, Hubei Hongshan Laboratory, Huazhong Agricultural University, Wuhan 430070, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
WD repeat-containing protein RUP2369Arabidopsis thalianaMutation(s): 0 
Gene Names: RUP2
UniProt
Find proteins for Q9FFA7 (Arabidopsis thaliana)
Explore Q9FFA7 
Go to UniProtKB:  Q9FFA7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9FFA7
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Ultraviolet-B receptor UVR8443Arabidopsis thalianaMutation(s): 1 
Gene Names: UVR8
UniProt
Find proteins for Q9FN03 (Arabidopsis thaliana)
Explore Q9FN03 
Go to UniProtKB:  Q9FN03
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9FN03
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
MES (Subject of Investigation/LOI)
Query on MES

Download Ideal Coordinates CCD File 
C [auth B]2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.175 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 173.393α = 90
b = 173.393β = 90
c = 76.737γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China--

Revision History  (Full details and data files)

  • Version 1.0: 2022-09-14
    Type: Initial release
  • Version 1.1: 2022-09-21
    Changes: Database references
  • Version 1.2: 2023-01-25
    Changes: Database references
  • Version 1.3: 2023-11-29
    Changes: Data collection, Refinement description