1RKE

Human vinculin head (1-258) in complex with human vinculin tail (879-1066)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Vinculin activation by talin through helical bundle conversion

Izard, T.Evans, G.Borgon, R.A.Rush, C.L.Bricogne, G.Bois, P.R.

(2004) Nature 427: 171-175

  • DOI: 10.1038/nature02281
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Vinculin is a conserved component and an essential regulator of both cell-cell (cadherin-mediated) and cell-matrix (integrin-talin-mediated focal adhesions) junctions, and it anchors these adhesion complexes to the actin cytoskeleton by binding to ta ...

    Vinculin is a conserved component and an essential regulator of both cell-cell (cadherin-mediated) and cell-matrix (integrin-talin-mediated focal adhesions) junctions, and it anchors these adhesion complexes to the actin cytoskeleton by binding to talin in integrin complexes or to alpha-actinin in cadherin junctions. In its resting state, vinculin is held in a closed conformation through interactions between its head (Vh) and tail (Vt) domains. The binding of vinculin to focal adhesions requires its association with talin. Here we report the crystal structures of human vinculin in its inactive and talin-activated states. Talin binding induces marked conformational changes in Vh, creating a novel helical bundle structure, and this alteration actively displaces Vt from Vh. These results, as well as the ability of alpha-actinin to also bind to Vh and displace Vt from pre-existing Vh-Vt complexes, support a model whereby Vh functions as a domain that undergoes marked structural changes that allow vinculin to direct cytoskeletal assembly in focal adhesions and adherens junctions. Notably, talin's effects on Vh structure establish helical bundle conversion as a signalling mechanism by which proteins direct cellular responses.


    Organizational Affiliation

    Department of Hematology-Oncology, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. tina.izard@stjude.org




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Vinculin
A
262Homo sapiensMutation(s): 0 
Gene Names: VCL
Find proteins for P18206 (Homo sapiens)
Go to Gene View: VCL
Go to UniProtKB:  P18206
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
VCL protein
B
185Homo sapiensMutation(s): 0 
Gene Names: VCL
Find proteins for P18206 (Homo sapiens)
Go to Gene View: VCL
Go to UniProtKB:  P18206
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.206 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 86.603α = 90.00
b = 161.648β = 90.00
c = 36.040γ = 90.00
Software Package:
Software NamePurpose
SHARPphasing
d*TREKdata scaling
d*TREKdata reduction
SCALAdata scaling
BUSTER-TNTrefinement
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-01-13
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance