1SYQ

Human vinculin head domain VH1, residues 1-258, in complex with human talin's vinculin binding site 1, residues 607-636


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.42 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for amplifying vinculin activation by talin

Izard, T.Vonrhein, C.

(2004) J.Biol.Chem. 279: 27667-27678

  • DOI: 10.1074/jbc.M403076200

  • PubMed Abstract: 
  • Talin interactions with vinculin are essential for focal adhesions. Curiously, talin contains three noncontiguous vinculin binding sites (VBS) that can bind individually to the vinculin head (Vh) domain. Here we report the crystal structure of the hu ...

    Talin interactions with vinculin are essential for focal adhesions. Curiously, talin contains three noncontiguous vinculin binding sites (VBS) that can bind individually to the vinculin head (Vh) domain. Here we report the crystal structure of the human Vh.VBS1 complex, a validated model of the Vh.VBS2 structure, and biochemical studies that demonstrate that all of talin VBSs activate vinculin by provoking helical bundle conversion of the Vh domain, which displaces the vinculin tail (Vt) domain. Thus, helical bundle conversion is a structurally conserved response in talin-vinculin interactions. Furthermore, talin VBSs bind to Vh in a mutually exclusive manner but do differ in their affinity for Vh and in their ability to displace Vt, suggesting that the strengths of these interactions could lead to differences in signaling outcome. These findings support a model in which talin binds to and activates multiple vinculin molecules to provoke rapid reorganization of the actin cytoskeleton.


    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 isoform VCL
A
264Homo 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
Talin 1
B
25Homo sapiensMutation(s): 0 
Gene Names: TLN1 (KIAA1027, TLN)
Find proteins for Q9Y490 (Homo sapiens)
Go to Gene View: TLN1
Go to UniProtKB:  Q9Y490
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.42 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.188 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 141.098α = 90.00
b = 141.098β = 90.00
c = 104.920γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-07-20
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance