4UFS

Low resolution structure R-spondin-2 (Fu1Fu2) in complex with the ectodomains of LGR5 and ZNRF3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.8 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.270 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of R-Spondin 2 in Complex with the Ectodomains of its Receptors Lgr5 and Znrf3.

Zebisch, M.Yvonne Jones, E.

(2015) J.Struct.Biol. 191: 149

  • DOI: 10.1016/j.jsb.2015.05.008
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The four secreted R-spondin (Rspo1-4) proteins of vertebrates function as stem cell growth factors and potentiate canonical Wnt signalling. Rspo proteins act by cross-linking members of two cell surface receptor families, complexing the stem cell mar ...

    The four secreted R-spondin (Rspo1-4) proteins of vertebrates function as stem cell growth factors and potentiate canonical Wnt signalling. Rspo proteins act by cross-linking members of two cell surface receptor families, complexing the stem cell markers LGR4-6 with the Frizzled-specific E3 ubiquitin ligases ZNRF3/RNF43. The consequent internalisation of the ternary LGR-Rspo-E3 complex removes the E3 ligase activity, which otherwise targets the Wnt receptor Frizzled for degradation, and thus enhances Wnt signalling. Multiple combinations of LGR4-6, Rspo1-4 and ZNRF3/RNF43 are possible, implying the existence of generic interaction determinants, but also of specific differences in complex architecture and activity. We present here a high resolution crystal structure of an ectodomain variant of human LGR5 (hLGR5ecto) complexed with a signalling competent fragment of mouse Rspo2 (mRspo2Fu1-Fu2). The structure shows that the particularly potent Rspo2 ligand engages LGR5 in a fashion almost identical to that reported for hRSPO1. Comparison of our hLGR5ecto structure with previously published structures highlights a surprising plasticity of the LGR ectodomains, characterised by a nearly 9° or larger rotation of the N-terminal half of the horseshoe-like fold relative to the C-terminal half. We also report a low resolution hLGR5-mRspo2Fu1-Fu2-mZNRF3ecto ternary complex structure. This crystal structure confirms our previously suggested hypothesis, showing that Rspo proteins cross-link LGRs and ZNRF3 into a 2:2:2 complex, whereas a 1:1:1 complex is formed with RNF43.


    Organizational Affiliation

    Division of Structural Biology, Henry Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, United Kingdom. Electronic address: yvonne@strubi.ox.ac.uk.,Division of Structural Biology, Henry Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LEUCINE-RICH REPEAT-CONTAINING G-PROTEIN COUPLED RECEPTOR 5
A
484Homo sapiensMutation(s): 0 
Gene Names: LGR5 (GPR49, GPR67)
Find proteins for O75473 (Homo sapiens)
Go to Gene View: LGR5
Go to UniProtKB:  O75473
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
R-SPONDIN-2
B
120Mus musculusMutation(s): 0 
Gene Names: Rspo2
Find proteins for Q8BFU0 (Mus musculus)
Go to UniProtKB:  Q8BFU0
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
E3 UBIQUITIN-PROTEIN LIGASE ZNRF3
C
165Homo sapiensMutation(s): 0 
Gene Names: ZNRF3 (KIAA1133, RNF203)
EC: 2.3.2.27
Find proteins for Q9ULT6 (Homo sapiens)
Go to Gene View: ZNRF3
Go to UniProtKB:  Q9ULT6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.8 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.270 
  • Space Group: I 4 2 2
Unit Cell:
Length (Å)Angle (°)
a = 188.609α = 90.00
b = 188.609β = 90.00
c = 165.292γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-07-08
    Type: Initial release
  • Version 1.1: 2015-07-15
    Type: Structure summary
  • Version 1.2: 2015-08-12
    Type: Database references