1DOW

CRYSTAL STRUCTURE OF A CHIMERA OF BETA-CATENIN AND ALPHA-CATENIN

• PDB DOI: https://doi.org/10.2210/pdb1DOW/pdb

• Classification: CELL ADHESION
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 1999-12-21 Released: 2000-07-12 
• Deposition Author(s): Pokutta, S., Weis, W.I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.233 
• R-Value Work: 0.200 
• R-Value Observed: 0.200 

Literature

Structure of the dimerization and beta-catenin-binding region of alpha-catenin.

Pokutta, S., Weis, W.I.

(2000) Mol Cell 5: 533-543

• PubMed: 10882138 
• DOI: https://doi.org/10.1016/s1097-2765(00)80447-5
• Primary Citation of Related Structures:  
  1DOV, 1DOW


• PubMed Abstract: 
  

  In adherens junctions, alpha-catenin links the cadherin-beta-catenin complex to the actin-based cytoskeleton. alpha-catenin is a homodimer in solution, but forms a 1:1 heterodimer with beta-catenin. The crystal structure of the alpha-catenin dimerization domain, residues 82-279, shows that alpha-catenin dimerizes through formation of a four-helix bundle in which two antiparallel helices are contributed by each protomer. A slightly larger fragment, comprising residues 57-264, binds to beta-catenin. A chimera consisting of the alpha-catenin-binding region of beta-catenin linked to the amino terminus of alpha-catenin 57-264 behaves as a monomer in solution, as expected, since beta-catenin binding disrupts the alpha-catenin dimer. The crystal structure of this chimera reveals the interaction between alpha- and beta-catenin, and provides a basis for understanding adherens junction assembly.

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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: Hetero 2-mer - A1B1 

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

Macromolecule Content

• Total Structure Weight: 26.36 kDa 
• Atom Count: 2,096 
• Modelled Residue Count: 237 
• Deposited Residue Count: 237 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ALPHA-CATENIN	A	205	Mus musculus	Mutation(s): 5
UniProt
Find proteins for P26231 (Mus musculus) Explore P26231  Go to UniProtKB:  P26231

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
BETA-CATENIN	B	32	Mus musculus	Mutation(s): 1
UniProt & NIH Common Fund Data Resources
Find proteins for Q02248 (Mus musculus) Explore Q02248  Go to UniProtKB:  Q02248
IMPC:  MGI:88276

Small Molecules

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: 1.80 Å
• R-Value Free: 0.233 
• R-Value Work: 0.200 
• R-Value Observed: 0.200 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 53	α = 90
b = 62.62	β = 90
c = 63.66	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: 2000-07-12 
Deposition Author(s): Pokutta, S., Weis, W.I.

Revision History  

• Version 1.0: 2000-07-12
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-11-13
  Changes: Data collection, Database references, Derived calculations, Structure summary