3BCT

THE ARMADILLO REPEAT REGION FROM MURINE BETA-CATENIN

• PDB DOI: https://doi.org/10.2210/pdb3BCT/pdb

• Classification: ARMADILLO REPEAT
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 1997-07-31 Released: 1997-11-19 
• Deposition Author(s): Huber, A.H., Nelson, W.J., Weis, W.I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.260 
• R-Value Work: 0.229 
• R-Value Observed: 0.229 

Literature

Three-dimensional structure of the armadillo repeat region of beta-catenin.

Huber, A.H., Nelson, W.J., Weis, W.I.

(1997) Cell 90: 871-882

• PubMed: 9298899 
• DOI: https://doi.org/10.1016/s0092-8674(00)80352-9
• Primary Citation of Related Structures:  
  2BCT, 3BCT


• PubMed Abstract: 
  

  Beta-catenin is essential for cadherin-based cell adhesion and Wnt/Wingless growth factor signaling. In these roles, it binds to cadherins, Tcf-family transcription factors, and the tumor suppressor gene product Adenomatous Polyposis Coli (APC). A core region of beta-catenin, composed of 12 copies of a 42 amino acid sequence motif known as an armadillo repeat, mediates these interactions. The three-dimensional structure of a protease-resistant fragment of beta-catenin containing the armadillo repeat region has been determined. The 12 repeats form a superhelix of helices that features a long, positively charged groove. Although unrelated in sequence, the beta-catenin binding regions of cadherins, Tcfs, and APC are acidic and are proposed to interact with this groove.

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Organizational Affiliation: 

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

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 52.29 kDa 
• Atom Count: 3,761 
• Modelled Residue Count: 457 
• Deposited Residue Count: 470 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
BETA-CATENIN	A	470	Mus musculus	Mutation(s): 12
UniProt & NIH Common Fund Data Resources
Find proteins for Q02248 (Mus musculus) Explore Q02248  Go to UniProtKB:  Q02248
IMPC:  MGI:88276

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
URE	C [auth A], D [auth A], E [auth A], F [auth A], G [auth A], H [auth A], I [auth A], J [auth A]	UREA C H4 N2 O XSQUKJJJFZCRTK-UHFFFAOYSA-N
CL	B [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.260 
• R-Value Work: 0.229 
• R-Value Observed: 0.229 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.1	α = 90
b = 102	β = 90
c = 187	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1997-11-19 
Deposition Author(s): Huber, A.H., Nelson, W.J., Weis, W.I.

Revision History  

• Version 1.0: 1997-11-19
  Type: Initial release
  
• Version 1.1: 2008-03-25
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2024-10-23
  Changes: Atomic model, Data collection, Database references, Derived calculations, Structure summary