4IGG

Full-length human alpha-catenin crystal structure


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.66 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Dimer asymmetry defines alpha-catenin interactions.

Rangarajan, E.S.Izard, T.

(2013) Nat.Struct.Mol.Biol. 20: 188-193

  • DOI: 10.1038/nsmb.2479

  • PubMed Abstract: 
  • The F-actin-binding cytoskeletal protein α-catenin interacts with β-catenin-cadherin complexes and stabilizes cell-cell junctions. The β-catenin-α-catenin complex cannot bind F-actin, whereas interactions of α-catenin with the cytoskeletal protein vi ...

    The F-actin-binding cytoskeletal protein α-catenin interacts with β-catenin-cadherin complexes and stabilizes cell-cell junctions. The β-catenin-α-catenin complex cannot bind F-actin, whereas interactions of α-catenin with the cytoskeletal protein vinculin appear to be necessary to stabilize adherens junctions. Here we report the crystal structure of nearly full-length human α-catenin at 3.7-Å resolution. α-catenin forms an asymmetric dimer where the four-helix bundle domains of each subunit engage in distinct intermolecular interactions. This results in a left handshake-like dimer, wherein the two subunits have remarkably different conformations. The crystal structure explains why dimeric α-catenin has a higher affinity for F-actin than does monomeric α-catenin, why the β-catenin-α-catenin complex does not bind F-actin, how activated vinculin links the cadherin-catenin complex to the cytoskeleton and why α-catenin but not inactive vinculin can bind F-actin.


    Organizational Affiliation

    Department of Cancer Biology, Scripps Research Institute, Jupiter, Florida, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Catenin alpha-1
A, B
832Homo sapiensMutation(s): 0 
Gene Names: CTNNA1
Find proteins for P35221 (Homo sapiens)
Go to Gene View: CTNNA1
Go to UniProtKB:  P35221
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.66 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.217 
  • Space Group: P 32
Unit Cell:
Length (Å)Angle (°)
a = 145.629α = 90.00
b = 145.629β = 90.00
c = 139.081γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
TNTrefinement
PDB_EXTRACTdata extraction
BUSTERrefinement
SHARPphasing
SERGUIdata collection
XSCALEdata scaling
SOLOMONphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-26
    Type: Initial release
  • Version 1.1: 2013-09-11
    Type: Database references