4ONS

Structural and thermodynamic characterization of cadherin-beta-catenin-alpha-catenin complex formation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.207 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural and Thermodynamic Characterization of Cadherin beta-Catenin alpha-Catenin Complex Formation.

Pokutta, S.Choi, H.J.Ahlsen, G.Hansen, S.D.Weis, W.I.

(2014) J Biol Chem 289: 13589-13601

  • DOI: 10.1074/jbc.M114.554709
  • Primary Citation of Related Structures:  
    4ONS

  • PubMed Abstract: 
  • The classical cadherin·β-catenin·α-catenin complex mediates homophilic cell-cell adhesion and mechanically couples the actin cytoskeletons of adjacent cells. Although α-catenin binds to β-catenin and to F-actin, β-catenin significantly weakens the affinity of α-catenin for F-actin ...

    The classical cadherin·β-catenin·α-catenin complex mediates homophilic cell-cell adhesion and mechanically couples the actin cytoskeletons of adjacent cells. Although α-catenin binds to β-catenin and to F-actin, β-catenin significantly weakens the affinity of α-catenin for F-actin. Moreover, α-catenin self-associates into homodimers that block β-catenin binding. We investigated quantitatively and structurally αE- and αN-catenin dimer formation, their interaction with β-catenin and the cadherin·β-catenin complex, and the effect of the α-catenin actin-binding domain on β-catenin association. The two α-catenin variants differ in their self-association properties: at physiological temperatures, αE-catenin homodimerizes 10× more weakly than does αN-catenin but is kinetically trapped in its oligomeric state. Both αE- and αN-catenin bind to β-catenin with a Kd of 20 nM, and this affinity is increased by an order of magnitude when cadherin is bound to β-catenin. We describe the crystal structure of a complex representing the full β-catenin·αN-catenin interface. A three-dimensional model of the cadherin·β-catenin·α-catenin complex based on these new structural data suggests mechanisms for the enhanced stability of the ternary complex. The C-terminal actin-binding domain of α-catenin has no influence on the interactions with β-catenin, arguing against models in which β-catenin weakens actin binding by stabilizing inhibitory intramolecular interactions between the actin-binding domain and the rest of α-catenin.


    Organizational Affiliation

    From the Departments of Structural Biology and Molecular and Cellular Physiology, Stanford University, Stanford, California 94305.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Catenin alpha-2 AC248Mus musculusMutation(s): 0 
Gene Names: Ctnna2Catna2
Find proteins for Q61301 (Mus musculus)
Explore Q61301 
Go to UniProtKB:  Q61301
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Catenin beta-1 BD88Mus musculusMutation(s): 0 
Gene Names: Ctnnb1Catnb
Find proteins for Q02248 (Mus musculus)
Explore Q02248 
Go to UniProtKB:  Q02248
NIH Common Fund Data Resources
IMPC:  MGI:88276
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.207 
  • Space Group: P 31
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.125α = 90
b = 96.125β = 90
c = 65.517γ = 120
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata scaling
XSCALEdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-04-09
    Type: Initial release
  • Version 1.1: 2014-05-07
    Changes: Database references
  • Version 1.2: 2014-05-28
    Changes: Database references