2GL7

Crystal Structure of a beta-catenin/BCL9/Tcf4 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of a beta-Catenin/BCL9/Tcf4 Complex.

Sampietro, J.Dahlberg, C.L.Cho, U.S.Hinds, T.R.Kimelman, D.Xu, W.

(2006) Mol.Cell 24: 293-300

  • DOI: 10.1016/j.molcel.2006.09.001

  • PubMed Abstract: 
  • The canonical Wnt pathway plays critical roles in embryonic development, stem cell growth, and tumorigenesis. Stimulation of the Wnt pathway leads to the association of beta-catenin with Tcf and BCL9 in the nucleus, resulting in the transactivation o ...

    The canonical Wnt pathway plays critical roles in embryonic development, stem cell growth, and tumorigenesis. Stimulation of the Wnt pathway leads to the association of beta-catenin with Tcf and BCL9 in the nucleus, resulting in the transactivation of Wnt target genes. We have determined the crystal structure of a beta-catenin/BCL9/Tcf-4 triple complex at 2.6 A resolution. Our studies reveal that the beta-catenin binding site of BCL9 is distinct from that of most other beta-catenin partners and forms a good target for developing drugs that block canonical Wnt/beta-catenin signaling. The BCL9 beta-catenin binding domain (CBD) forms an alpha helix that binds to the first armadillo repeat of beta-catenin, which can be mutated to prevent beta-catenin binding to BCL9 without affecting cadherin or alpha-catenin binding. We also demonstrate that beta-catenin Y142 phosphorylation, which has been proposed to regulate BCL9-2 binding, does not directly affect the interaction of beta-catenin with either BCL9 or BCL9-2.


    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, D
550Homo sapiensMutations: E6Y
Gene Names: CTNNB1 (CTNNB)
Find proteins for P35222 (Homo sapiens)
Go to Gene View: CTNNB1
Go to UniProtKB:  P35222
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Transcription factor 7-like 2
B, E
53Homo sapiensGene Names: TCF7L2 (TCF4)
Find proteins for Q9NQB0 (Homo sapiens)
Go to Gene View: TCF7L2
Go to UniProtKB:  Q9NQB0
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
B-cell lymphoma 9 protein
C, F
46Homo sapiensGene Names: BCL9
Find proteins for O00512 (Homo sapiens)
Go to Gene View: BCL9
Go to UniProtKB:  O00512
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.221 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 96.764α = 90.00
b = 119.441β = 90.00
c = 130.549γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
ADSCdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2006-04-04 
  • Released Date: 2006-10-31 
  • Deposition Author(s): Sampietro, J.

Revision History 

  • Version 1.0: 2006-10-31
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance