1M1E

Beta-catenin armadillo repeat domain bound to ICAT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

ICAT inhibits Beta-catenin binding to Tcf/Lef-family transcription factors and the general coactivator p300 using independent structural modules.

Daniels, D.L.Weis, W.I.

(2002) Mol.Cell 10: 573-584


  • PubMed Abstract: 
  • In the canonical Wnt signaling pathway, beta-catenin activates target genes through its interactions with Tcf/Lef-family transcription factors and additional transcriptional coactivators. The crystal structure of ICAT, an inhibitor of beta-catenin-me ...

    In the canonical Wnt signaling pathway, beta-catenin activates target genes through its interactions with Tcf/Lef-family transcription factors and additional transcriptional coactivators. The crystal structure of ICAT, an inhibitor of beta-catenin-mediated transcription, bound to the armadillo repeat domain of beta-catenin, has been determined. ICAT contains an N-terminal helilical domain that binds to repeats 11 and 12 of beta-catenin, and an extended C-terminal region that binds to repeats 5-10 in a manner similar to that of Tcfs and other beta-catenin ligands. Full-length ICAT dissociates complexes of beta-catenin, Lef-1, and the transcriptional coactivator p300, whereas the helical domain alone selectively blocks binding to p300. The C-terminal armadillo repeats of beta-catenin may be an attractive target for compounds designed to disrupt aberrant beta-catenin-mediated transcription associated with various cancers.


    Organizational Affiliation

    Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-catenin
A
538Mus musculusGene Names: Ctnnb1 (Catnb)
Find proteins for Q02248 (Mus musculus)
Go to UniProtKB:  Q02248
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ICAT
B
81Homo sapiensGene Names: CTNNBIP1 (ICAT)
Find proteins for Q9NSA3 (Homo sapiens)
Go to Gene View: CTNNBIP1
Go to UniProtKB:  Q9NSA3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.202 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 97.750α = 90.00
b = 97.320β = 90.00
c = 86.820γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
MOSFLMdata reduction
SCALAdata scaling
COMOphasing
CNSrefinement

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