1JDH

CRYSTAL STRUCTURE OF BETA-CATENIN AND HTCF-4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Tcf4 can specifically recognize beta-catenin using alternative conformations.

Graham, T.A.Ferkey, D.M.Mao, F.Kimelman, D.Xu, W.

(2001) Nat.Struct.Mol.Biol. 8: 1048-1052

  • DOI: 10.1038/nsb718

  • PubMed Abstract: 
  • Accumulation of the Wnt pathway effector beta-catenin is a hallmark of a number of cancers, including colon cancer. As beta-catenin accumulates in the cell, it forms a complex with Tcf family transcription factors and activates the transcription of s ...

    Accumulation of the Wnt pathway effector beta-catenin is a hallmark of a number of cancers, including colon cancer. As beta-catenin accumulates in the cell, it forms a complex with Tcf family transcription factors and activates the transcription of several critical genes involved in cell proliferation. Because Tcf4 is the predominant Tcf factor present in colon cancer cells, drugs that specifically disrupt the beta-catenin-Tcf4 complex could be useful in treating colon cancers. Earlier structural and biochemical studies demonstrated that the central region of the beta-catenin binding domain of Tcf is essential for anchoring Tcf to beta-catenin via two conserved lysines in beta-catenin (called the charged 'buttons'). Here we report the crystal structure of a beta-catenin-Tcf4 complex at 2.0 A resolution. Our structural and mutagenesis studies show that Tcf4 docks specifically to beta-catenin using several distinct conformations in its essential central region. These conformations allow different glutamate residues in the central region of Tcf4 to form a salt bridge with the same critical charged button, Lys 312 of beta-catenin. We propose that this interaction may be the first event in beta-catenin-Tcf4 recognition.


    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
529Homo 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
hTcf-4
B
38Homo sapiensMutation(s): 0 
Gene Names: TCF7L2 (TCF4)
Find proteins for Q9NQB0 (Homo sapiens)
Go to Gene View: TCF7L2
Go to UniProtKB:  Q9NQB0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 49.770α = 90.00
b = 76.033β = 90.00
c = 159.129γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-12-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-04-04
    Type: Data collection