5UWG

The crystal structure of Fz4-CRD in complex with palmitoleic acid

  • Classification: SIGNALING PROTEIN
  • Organism(s): Homo sapiens
  • Expression System: Homo sapiens
  • Mutation(s): No 

  • Deposited: 2017-02-21 Released: 2017-06-14 
  • Deposition Author(s): Ke, J., DeBruine, Z.J., Gu, X., Brunzelle, J.S., Xu, H.E., Melcher, K.
  • Funding Organization(s): National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS), Van Andel Research Institute Foundation

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.246 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Wnt5a promotes Frizzled-4 signalosome assembly by stabilizing cysteine-rich domain dimerization.

DeBruine, Z.J., Ke, J., Harikumar, K.G., Gu, X., Borowsky, P., Williams, B.O., Xu, W., Miller, L.J., Xu, H.E., Melcher, K.

(2017) Genes Dev 31: 916-926

  • DOI: 10.1101/gad.298331.117
  • Primary Citation of Related Structures:  
    5UWG

  • PubMed Abstract: 

    • Wnt/β-catenin signaling is activated when extracellular Wnt ligands bind Frizzled (FZD) receptors at the cell membrane. Wnts bind FZD cysteine-rich domains (CRDs) with high affinity through a palmitoylated N-terminal "thumb" and a disulfide-stabilized C- ...

    Wnt/β-catenin signaling is activated when extracellular Wnt ligands bind Frizzled (FZD) receptors at the cell membrane. Wnts bind FZD cysteine-rich domains (CRDs) with high affinity through a palmitoylated N-terminal "thumb" and a disulfide-stabilized C-terminal "index finger," yet how these binding events trigger receptor activation and intracellular signaling remains unclear. Here we report the crystal structure of the Frizzled-4 (FZD 4 ) CRD in complex with palmitoleic acid, which reveals a CRD tetramer consisting of two cross-braced CRD dimers. Each dimer is stabilized by interactions of one hydrophobic palmitoleic acid tail with two CRD palmitoleoyl-binding grooves oriented end to end, suggesting that the Wnt palmitoleoyl group stimulates CRD-CRD interaction. Using bioluminescence resonance energy transfer (BRET) in live cells, we show that WNT5A stimulates dimerization of membrane-anchored FZD 4 CRDs and oligomerization of full-length FZD 4 , which requires the integrity of CRD palmitoleoyl-binding residues. These results suggest that FZD receptors may form signalosomes in response to Wnt binding through the CRDs and that the Wnt palmitoleoyl group is important in promoting these interactions. These results complement our understanding of lipoprotein receptor-related proteins 5 and 6 (LRP5/6), Dishevelled, and Axin signalosome assembly and provide a more complete model for Wnt signalosome assembly both intracellularly and at the membrane.

    Organizational Affiliation: 

    Center for Cancer and Cell Biology, Laboratory for Structural Biology and Biochemistry, Van Andel Research Institute, Grand Rapids, Michigan 49503, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Frizzled-4 A, B125Homo sapiensMutation(s): 0 
Gene Names: FZD4
Find proteins for Q9ULV1 (Homo sapiens)
Explore Q9ULV1 
Go to UniProtKB:  Q9ULV1
NIH Common Fund Data Resources
PHAROS:  Q9ULV1
GTEx:  ENSG00000174804
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PAM
Query on PAM
Download Ideal Coordinates CCD File 
A
PALMITOLEIC ACID
C16 H30 O2
SECPZKHBENQXJG-FPLPWBNLSA-N		 Ligand Interaction
NAG
Query on NAG
Download Ideal Coordinates CCD File 
A, B
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.246 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.452α = 90
b = 109.373β = 90
c = 76.789γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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View more in-depth experimental data

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United StatesDK071662
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM104212
National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS)United StatesAR053293
Van Andel Research Institute FoundationUnited States--

Revision History 

  • Version 1.0: 2017-06-14
    Type: Initial release
  • Version 1.1: 2017-09-27
    Changes: Author supporting evidence
  • Version 1.2: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary