Biological Assembly 1  

 3D View: Structure

Global Symmetry: Helical - H  (3D View)
Global Stoichiometry: Homo 12-mer - A12 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: gel filtration, microscopy, assay for oligomerization

Macromolecule Content

• Total Structure Weight: 112.00 kDa 
• Atom Count: 7572 
• Residue Count: 936 
• Unique protein chains: 1

6VCC

Cryo-EM structure of the Dvl2 DIX filament

• DOI: 10.2210/pdb6VCC/pdb
• EMDataResource: EMD-21148

• Classification: SIGNALING PROTEIN
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2019-12-20 Released: 2020-04-29 
• Deposition Author(s): Enos, M., Kan, W., Muennich, S., Chen, D.H., Skiniotis, G., Weis, W.I.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.60 Å
• Aggregation State: HELICAL ARRAY 
• Reconstruction Method: HELICAL 

Literature

Limited Dishevelled/Axin oligomerization determines efficiency of Wnt/ beta-catenin signal transduction.

Kan, W., Enos, M.D., Korkmazhan, E., Muennich, S., Chen, D.H., Gammons, M.V., Vasishtha, M., Bienz, M., Dunn, A.R., Skiniotis, G., Weis, W.I.

(2020) Elife 9

• PubMed: 32297861 
• DOI: 10.7554/eLife.55015
• Primary Citation of Related Structures:  
  6VCC


• PubMed Abstract: 
  

In Wnt/β-catenin signaling, the transcriptional coactivator β-catenin is regulated by its phosphorylation in a complex that includes the scaffold protein Axin and associated kinases. Wnt binding to its coreceptors activates the cytosolic effector Dishevelled (Dvl), leading to the recruitment of Axin and the inhibition of β-catenin phosphorylation. This process requires interaction of homologous DIX domains present in Dvl and Axin, but is mechanistically undefined. We show that Dvl DIX forms antiparallel, double-stranded oligomers in vitro, and that Dvl in cells forms oligomers typically <10 molecules at endogenous expression levels. Axin DIX (DAX) forms small single-stranded oligomers, but its self-association is stronger than that of DIX. DAX caps the ends of DIX oligomers, such that a DIX oligomer has at most four DAX binding sites. The relative affinities and stoichiometry of the DIX-DAX interaction provide a mechanism for efficient inhibition of β-catenin phosphorylation upon Axin recruitment to the Wnt receptor complex.

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Organizational Affiliation: 

Graduate Program in Biophysics, Stanford University, Stanford, United States.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Segment polarity protein dishevelled homolog DVL-2	A,  B,  C,  D,  E,  F,  G,  H,  I,  J,  K,  L	83	Mus musculus	Mutation(s): 0  Gene Names: Dvl2
Find proteins for Q60838 (Mus musculus) Explore Q60838  Go to UniProtKB:  Q60838

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.60 Å
• Aggregation State: HELICAL ARRAY 
• Reconstruction Method: HELICAL 

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2019-12-20 
• Released Date: 2020-04-29 
Deposition Author(s): Enos, M., Kan, W., Muennich, S., Chen, D.H., Skiniotis, G., Weis, W.I.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	R35 GM131747

Revision History 

• Version 1.0: 2020-04-29
  Type: Initial release