1LUJ

Crystal Structure of the Beta-catenin/ICAT Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The crystal structure of the beta-catenin/ICAT complex reveals the inhibitory mechanism of ICAT.

Graham, T.A.Clements, W.K.Kimelman, D.Xu, W.

(2002) Mol.Cell 10: 563-571


  • PubMed Abstract: 
  • Beta-catenin is a multifunctional protein involved in both cell adhesion and transcriptional activation. Transcription mediated by the beta-catenin/Tcf complex is involved in embryological development and is upregulated in various cancers. We have de ...

    Beta-catenin is a multifunctional protein involved in both cell adhesion and transcriptional activation. Transcription mediated by the beta-catenin/Tcf complex is involved in embryological development and is upregulated in various cancers. We have determined the crystal structure at 2.5 A resolution of a complex between beta-catenin and ICAT, a protein that prevents the interaction between beta-catenin and Tcf/Lef family transcription factors. ICAT contains a 3-helix bundle that binds armadillo repeats 10-12 and a C-terminal tail that, similar to Tcf and E-cadherin, binds in the groove formed by armadillo repeats 5-9 of beta-catenin. We show that ICAT selectively inhibits beta-catenin/Tcf binding in vivo, without disrupting beta-catenin/cadherin interactions. Thus, it should be possible to design cancer therapeutics that inhibit beta-catenin-mediated transcriptional activation without interfering with cell adhesion.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Catenin beta-1
A
514Homo sapiensMutation(s): 0 
Gene Names: CTNNB1 (CTNNB)
Find proteins for P35222 (Homo sapiens)
Go to Gene View: CTNNB1
Go to UniProtKB:  P35222
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Beta-catenin-interacting protein 1
B
75Mus musculusMutation(s): 0 
Gene Names: Ctnnbip1 (Catnbip1, Icat)
Find proteins for Q9JJN6 (Mus musculus)
Go to UniProtKB:  Q9JJN6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.210 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 95.174α = 90.00
b = 98.504β = 90.00
c = 86.486γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SCALEPACKdata scaling
HKL-2000data reduction
AMoREphasing
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-10-16
    Type: Initial release
  • Version 1.1: 2008-04-28
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2016-03-16
    Type: Source and taxonomy