4KNG image
Entry Detail
PDB ID:
4KNG
Keywords:
Signaling Protein, Membrane Protein
Title:
Crystal structure of human LGR5-RSPO1-RNF43
Biological Source:
Source Organism:
Homo sapiens
Host Organism:
Homo sapiens
PDB Version:
Deposition Date:
2013-05-09
Release Date:
2013-06-19
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.50 Å
R-Value Free:
0.27
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
P 21 21 21
4KNG validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:Leucine-rich repeat-containing G-protein coupled receptor 5
Chain IDs:A, B
Chain Length:531
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:O75473 Pfam ID:PF01462, PF13855, PF12799
Protein Blast
Polymer Type:polypeptide(L)
Description:E3 ubiquitin-protein ligase RNF43
Chain IDs:E, F
Chain Length:160
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q68DV7 Pfam ID:PF18212
Protein Blast
Polymer Type:polypeptide(L)
Description:R-spondin-1
Chain IDs:C (auth: M), D (auth: P)
Chain Length:115
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:Q2MKA7 Pfam ID:PF15913
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ASN B ASN GLYCOSYLATION SITE
Ligand Molecules
NAG
NI
Primary Citation
The structural basis of R-spondin recognition by LGR5 and RNF43.
Genes Dev. 27 1345 1350 (2013)
PMID: 23756651 DOI: 10.1101/gad.219915.113

Abstact

R-spondins (RSPOs) enhance Wnt signaling, affect stem cell behavior, bind to leucine-rich repeat-containing G-protein-coupled receptors 4-6, (LGR4-6) and the transmembrane E3 ubiquitin ligases RING finger 43/zinc and RING finger 3 (RNF43/ZNRF3). The structure of RSPO1 bound to both LGR5 and RNF43 ectodomains confirms their physical linkage. RSPO1 is sandwiched by LGR5 and RNF43, with its rod module of the cysteine-rich domain (CRD) contacting LGR5 and a hairpin inserted into RNF43. LGR5 does not contact RNF43 but increases the affinity of RSPO1 to RNF43, supporting LGR5 as an engagement receptor and RNF43 as an effector receptor. Disease mutations map to the RSPO1-RNF43 interface, which promises therapeutic targeting.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
4KNG