1V18

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.253 
  • R-Value Work: 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:  

  • 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 reco ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BETA-CATENIN
A
538Mus musculusMutation(s): 0 
Gene Names: Ctnnb1 (Catnb)
Find proteins for Q02248 (Mus musculus)
Go to UniProtKB:  Q02248
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ADENOMATOUS POLYPOSIS COLI
B
47Homo sapiensMutation(s): 0 
Gene Names: APC (DP2.5)
Find proteins for P25054 (Homo sapiens)
Go to Gene View: APC
Go to UniProtKB:  P25054
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
B
L-PEPTIDE LINKINGC3 H8 N O6 PSER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 50.830α = 90.00
b = 90.060β = 90.00
c = 122.810γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data scaling
AMoREphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



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 

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