4MY2

Crystal Structure of Norrin in fusion with Maltose Binding Protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and function of Norrin in assembly and activation of a Frizzled 4-Lrp5/6 complex.

Ke, J.Harikumar, K.G.Erice, C.Chen, C.Gu, X.Wang, L.Parker, N.Cheng, Z.Xu, W.Williams, B.O.Melcher, K.Miller, L.J.Xu, H.E.

(2013) Genes Dev. 27: 2305-2319

  • DOI: 10.1101/gad.228544.113

  • PubMed Abstract: 
  • Norrin is a cysteine-rich growth factor that is required for angiogenesis in the eye, ear, brain, and female reproductive organs. It functions as an atypical Wnt ligand by specifically binding to the Frizzled 4 (Fz4) receptor. Here we report the crys ...

    Norrin is a cysteine-rich growth factor that is required for angiogenesis in the eye, ear, brain, and female reproductive organs. It functions as an atypical Wnt ligand by specifically binding to the Frizzled 4 (Fz4) receptor. Here we report the crystal structure of Norrin, which reveals a unique dimeric structure with each monomer adopting a conserved cystine knot fold. Functional studies demonstrate that the novel Norrin dimer interface is required for Fz4 activation. Furthermore, we demonstrate that Norrin contains separate binding sites for Fz4 and for the Wnt ligand coreceptor Lrp5 (low-density lipoprotein-related protein 5) or Lrp6. Instead of inducing Fz4 dimerization, Norrin induces the formation of a ternary complex with Fz4 and Lrp5/6 by binding to their respective extracellular domains. These results provide crucial insights into the assembly and activation of the Norrin-Fz4-Lrp5/6 signaling complex.


    Organizational Affiliation

    Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, Michigan 49503, USA;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Maltose-binding periplasmic protein, Norrin fusion protein
A
477Homo sapiensEscherichia coli O157:H7
This entity is chimeric
Mutation(s): 0 
Gene Names: NDP (EVR2), malE
Find proteins for Q00604 (Homo sapiens)
Go to Gene View: NDP
Go to UniProtKB:  Q00604
Find proteins for P0AEY0 (Escherichia coli O157:H7)
Go to UniProtKB:  P0AEY0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAL
Query on MAL

Download SDF File 
Download CCD File 
A
MALTOSE
C12 H22 O11
GUBGYTABKSRVRQ-ASMJPISFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.207 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 59.458α = 90.00
b = 79.022β = 90.00
c = 104.241γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
HKL-2000data collection
PHASERphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-11-13
    Type: Initial release
  • Version 1.1: 2013-11-20
    Type: Database references
  • Version 1.2: 2017-08-09
    Type: Refinement description, Source and taxonomy