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 
  • R-Value Observed: 0.194 

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
  • Primary Citation of Related Structures:  
    1SYQ

  • 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 human Vh ...

    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: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
vinculin isoform VCL A264Homo sapiensMutation(s): 0 
Gene Names: VCL
Find proteins for P18206 (Homo sapiens)
Explore P18206 
Go to UniProtKB:  P18206
NIH Common Fund Data Resources
PHAROS:  P18206
GTEx:  ENSG00000035403
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Talin 1 B25N/AMutation(s): 0 
Find proteins for Q9Y490 (Homo sapiens)
Explore Q9Y490 
Go to UniProtKB:  Q9Y490
NIH Common Fund Data Resources
PHAROS:  Q9Y490
GTEx:  ENSG00000137076
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.42 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.194 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 141.098α = 90
b = 141.098β = 90
c = 104.92γ = 120
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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