1QZ7

Beta-catenin binding domain of Axin in complex with beta-catenin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a beta-catenin/Axin complex suggests a mechanism for the {beta}-catenin destruction complex

Xing, Y.Clements, W.K.Kimelman, D.Xu, W.

(2003) GENES DEV. 17: 2753-2764

  • DOI: 10.1101/gad.1142603

  • PubMed Abstract: 
  • The "beta-catenin destruction complex" is central to canonical Wnt/beta-catenin signaling. The scaffolding protein Axin and the tumor suppressor adenomatous polyposis coli protein (APC) are critical components of this complex, required for rapid beta ...

    The "beta-catenin destruction complex" is central to canonical Wnt/beta-catenin signaling. The scaffolding protein Axin and the tumor suppressor adenomatous polyposis coli protein (APC) are critical components of this complex, required for rapid beta-catenin turnover. We determined the crystal structure of a complex between beta-catenin and the beta-catenin-binding domain of Axin (Axin-CBD). The Axin-CBD forms a helix that occupies the groove formed by the third and fourth armadillo repeats of beta-catenin and thus precludes the simultaneous binding of other beta-catenin partners in this region. Our biochemical studies demonstrate that, when phosphorylated, the 20-amino acid repeat region of APC competes with Axin for binding to beta-catenin. We propose that a key function of APC in the beta-catenin destruction complex is to remove phosphorylated beta-catenin product from the active site.


    Organizational Affiliation

    Department of Biological Structure, University of Washington, Seattle, Washington 98195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-catenin
A
533Homo sapiensGene Names: CTNNB1 (CTNNB)
Find proteins for P35222 (Homo sapiens)
Go to Gene View: CTNNB1
Go to UniProtKB:  P35222
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Axin
B
70Xenopus laevisGene Names: axin1 (axin, axn)
Find proteins for Q9YGY0 (Xenopus laevis)
Go to UniProtKB:  Q9YGY0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.221 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 85.141α = 90.00
b = 75.041β = 97.47
c = 101.398γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling
CNSrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-11-18
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance