2GL7

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

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.223 

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This is version 1.3 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
  • Primary Citation of Related Structures:  
    2GL7

  • 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 of Wnt target genes ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-cateninA, D550Homo sapiensMutation(s): 1 
Gene Names: CTNNB1, CTNNB, OK/SW-cl.35, PRO2286
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Find proteins for P35222 (Homo sapiens)
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Go to UniProtKB:  P35222
PHAROS:  P35222
GTEx:  ENSG00000168036 
Entity Groups  
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UniProt GroupP35222
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Transcription factor 7-like 2B, E53Homo sapiensMutation(s): 0 
Gene Names: TCF7L2, TCF4
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Find proteins for Q9NQB0 (Homo sapiens)
Explore Q9NQB0 
Go to UniProtKB:  Q9NQB0
PHAROS:  Q9NQB0
GTEx:  ENSG00000148737 
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UniProt GroupQ9NQB0
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
B-cell lymphoma 9 proteinC, F46Homo sapiensMutation(s): 0 
Gene Names: BCL9
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Find proteins for O00512 (Homo sapiens)
Explore O00512 
Go to UniProtKB:  O00512
PHAROS:  O00512
GTEx:  ENSG00000116128 
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UniProt GroupO00512
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.223 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.764α = 90
b = 119.441β = 90
c = 130.549γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
HKL-2000data reduction
AMoREphasing
REFMACrefinement
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

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

Revision History  (Full details and data files)

  • Version 1.0: 2006-10-31
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2021-10-20
    Changes: Database references