1V18

The crystal structure of beta-catenin armadillo repeat complexed with a phosphorylated APC 20mer repeat.

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.207 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Mechanism of Phosphorylation-Dependent Binding of Apc to Beta-Catenin and its Role in Beta-Catenin Degradation

Ha, N.-C., Tonozuka, T., Stamos, J.L., Weis, W.I.

(2004) Mol Cell 15: 511

  • DOI: 10.1016/j.molcel.2004.08.010
  • Primary Citation of Related Structures:  
    1T08, 1V18

  • PubMed Abstract: 

    • The transcriptional coactivator beta-catenin mediates Wnt growth factor signaling. In the absence of a Wnt signal, casein kinase 1 (CK1) and glycogen synthase kinase-3beta (GSK-3beta) phosphorylate cytosolic beta-catenin, thereby flagging it for recognition and destruction by the ubiquitin/proteosome machinery ...

    The transcriptional coactivator beta-catenin mediates Wnt growth factor signaling. In the absence of a Wnt signal, casein kinase 1 (CK1) and glycogen synthase kinase-3beta (GSK-3beta) phosphorylate cytosolic beta-catenin, thereby flagging it for recognition and destruction by the ubiquitin/proteosome machinery. Phosphorylation occurs in a multiprotein complex that includes the kinases, beta-catenin, axin, and the Adenomatous Polyposis Coli (APC) protein. The role of APC in this process is poorly understood. CK1epsilon and GSK-3beta phosphorylate APC, which increases its affinity for beta-catenin. Crystal structures of phosphorylated and nonphosphorylated APC bound to beta-catenin reveal a phosphorylation-dependent binding motif generated by mutual priming of CK1 and GSK-3beta substrate sequences. Axin is shown to act as a scaffold for substrate phosphorylation by these kinases. Phosphorylated APC and axin bind to the same surface of, and compete directly for, beta-catenin. The structural and biochemical data suggest a novel model for how APC functions in beta-catenin degradation.

    Organizational Affiliation: 

    Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94043, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BETA-CATENINA538Mus musculusMutation(s): 0 
Gene Names: Ctnnb1, Catnb
UniProt & NIH Common Fund Data Resources
Find proteins for Q02248 (Mus musculus)
Explore Q02248 
Go to UniProtKB:  Q02248
IMPC:  MGI:88276
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ADENOMATOUS POLYPOSIS COLIB47Homo sapiensMutation(s): 0 
Gene Names: APC, DP2.5
UniProt & NIH Common Fund Data Resources
Find proteins for P25054 (Homo sapiens)
Explore P25054 
Go to UniProtKB:  P25054
PHAROS:  P25054
GTEx:  ENSG00000134982
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP		BL-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.83α = 90
b = 90.06β = 90
c = 122.81γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
AMoREphasing

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2004-04-09 
  • Released Date: 2005-01-12 
    • Deposition Author(s): Ha, N.-C., Weis, W.I.

Revision History  (Full details and data files)

  • Version 1.0: 2005-01-12
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance