1T01

Vinculin complexed with the VBS1 helix from talin

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.06 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.230 

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This is version 1.2 of the entry. See complete history. 


Literature

Activation of a vinculin-binding site in the talin rod involves rearrangement of a five-helix bundle

PAPAGRIGORIOU, E., GINGRAS, A.R., BARSUKOV, I.L., Bate, N., Fillingham, I.J., Patel, B., Frank, R., Ziegler, W.H., Roberts, G.C., Critchley, D.R., Emsley, J.

(2004) EMBO J 23: 2942-2951

  • DOI: 10.1038/sj.emboj.7600285
  • Primary Citation of Related Structures:  
    1SJ7, 1SJ8, 1T01

  • PubMed Abstract: 

    • The interaction between the cytoskeletal proteins talin and vinculin plays a key role in integrin-mediated cell adhesion and migration. We have determined the crystal structures of two domains from the talin rod spanning residues 482-789. Talin 482-655, which contains a vinculin-binding site (VBS), folds into a five-helix bundle whereas talin 656-789 is a four-helix bundle ...

    The interaction between the cytoskeletal proteins talin and vinculin plays a key role in integrin-mediated cell adhesion and migration. We have determined the crystal structures of two domains from the talin rod spanning residues 482-789. Talin 482-655, which contains a vinculin-binding site (VBS), folds into a five-helix bundle whereas talin 656-789 is a four-helix bundle. We show that the VBS is composed of a hydrophobic surface spanning five turns of helix 4. All the key side chains from the VBS are buried and contribute to the hydrophobic core of the talin 482-655 fold. We demonstrate that the talin 482-655 five-helix bundle represents an inactive conformation, and mutations that disrupt the hydrophobic core or deletion of helix 5 are required to induce an active conformation in which the VBS is exposed. We also report the crystal structure of the N-terminal vinculin head domain in complex with an activated form of talin. Activation of the VBS in talin and the recruitment of vinculin may support the maturation of small integrin/talin complexes into more stable adhesions.

    Organizational Affiliation: 

    Department of Biochemistry, University of Leicester, Leicester, UK.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
unnamed protein productA255Gallus gallusMutation(s): 0 
Gene Names: VCL, VINC1
UniProt
Find proteins for P12003 (Gallus gallus)
Explore P12003 
Go to UniProtKB:  P12003
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP12003
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Talin 1B24Mus musculusMutation(s): 0 
Gene Names: Tln1, Tln
UniProt
Find proteins for P26039 (Mus musculus)
Explore P26039 
Go to UniProtKB:  P26039
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26039
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.06 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.230 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.645α = 90
b = 71.421β = 90
c = 96.093γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-08-24
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance