Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - AB 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 61831.24 
• Atom Count: 4025 
• Residue Count: 567 
• Unique protein chains: 2

1JDH

CRYSTAL STRUCTURE OF BETA-CATENIN AND HTCF-4

• DOI: 10.2210/pdb1JDH/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2001-06-13 Released: 2001-12-05 
• Deposition Author(s): Graham, T.A., Ferkey, D.M., Mao, F., Kimelman, D., Xu, W.

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Experimental Data Snapshot

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

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

• PubMed: 11713475 
• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
BETA-CATENIN	A	529	Homo sapiens	Mutation(s): 0  Gene Names: CTNNB1 (CTNNB)
Find proteins for P35222 (Homo sapiens) Go to Gene View: CTNNB1 Go to UniProtKB:  P35222

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
hTcf-4	B	38	Homo sapiens	Mutation(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 = 49.770	α = 90.00
b = 76.033	β = 90.00
c = 159.129	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-06-13 
• Released Date: 2001-12-05 
• Deposition Author(s): Graham, T.A., Ferkey, D.M., Mao, F., Kimelman, D., Xu, W.

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