4KT1

Complex of R-spondin 1 with LGR4 extracellular domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.497 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.160 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for R-spondin recognition by LGR4/5/6 receptors

Wang, D.L.Huang, B.Zhang, S.Yu, X.Wu, W.Wang, X.Q.

(2013) Genes Dev. 27: 1339-1344

  • DOI: 10.1101/gad.219360.113

  • PubMed Abstract: 
  • The R-spondin (RSPO) family of secreted proteins (RSPO1-RSPO4) has pleiotropic functions in development and stem cell growth by strongly enhancing Wnt pathway activation. Recently, leucine-rich repeat-containing G-protein-coupled receptor 4 (LGR4), L ...

    The R-spondin (RSPO) family of secreted proteins (RSPO1-RSPO4) has pleiotropic functions in development and stem cell growth by strongly enhancing Wnt pathway activation. Recently, leucine-rich repeat-containing G-protein-coupled receptor 4 (LGR4), LGR5, and LGR6 have been identified as receptors for RSPOs. Here we report the complex structure of the LGR4 extracellular domain (ECD) with the RSPO1 N-terminal fragment (RSPO1-2F) containing two adjacent furin-like cysteine-rich domains (FU-CRDs). The LGR4-ECD adopts the anticipated TLR horseshoe structure and uses its concave surface close to the N termini to bind RSPO1-2F. Both the FU-CRD1 and FU-CRD2 domains of RSPO1 contribute to LGR4 interaction, and binding and cellular assays identified critical RSPO1 residues for its biological activities. Our results define the molecular mechanism by which the LGR4/5/6 receptors recognize RSPOs and also provide structural insights into the signaling difference between the LGR4/5/6 receptors and other members in the LGR family.


    Organizational Affiliation

    Ministry of Education Key Laboratory of Protein Science, Center for Structural Biology, School of Life Sciences, Tsinghua University, Beijing 100084, PR China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Leucine-rich repeat-containing G-protein coupled receptor 4
A
504Homo sapiensMutation(s): 0 
Gene Names: LGR4 (GPR48)
Find proteins for Q9BXB1 (Homo sapiens)
Go to Gene View: LGR4
Go to UniProtKB:  Q9BXB1
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
R-spondin-1
E
90Homo sapiensMutation(s): 0 
Gene Names: RSPO1
Find proteins for Q2MKA7 (Homo sapiens)
Go to Gene View: RSPO1
Go to UniProtKB:  Q2MKA7
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.497 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.160 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 91.376α = 90.00
b = 91.376β = 90.00
c = 87.273γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXrefinement
HKL-2000data collection
PHASESphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-05-19 
  • Released Date: 2013-06-19 
  • Deposition Author(s): Wang, D.L., Wang, X.Q.

Revision History 

  • Version 1.0: 2013-06-19
    Type: Initial release
  • Version 1.1: 2013-08-14
    Type: Database references