4DJ9

Human vinculin head domain Vh1 (residues 1-258) in complex with the talin vinculin binding site 50 (VBS50, residues 2078-2099)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Crystal structure of vinculin in complex with vinculin binding site 50 (VBS50), the integrin binding site 2 (IBS2) of talin.

Yogesha, S.D.Rangarajan, E.S.Vonrhein, C.Bricogne, G.Izard, T.

(2012) Protein Sci 21: 583-588

  • DOI: 10.1002/pro.2041
  • Primary Citation of Related Structures:  
    4DJ9

  • PubMed Abstract: 
  • The cytoskeletal protein talin activates integrin receptors by binding of its FERM domain to the cytoplasmic tail of β-integrin. Talin also couples integrins to the actin cytoskeleton, largely by binding to and activating the cytoskeletal protein vin ...

    The cytoskeletal protein talin activates integrin receptors by binding of its FERM domain to the cytoplasmic tail of β-integrin. Talin also couples integrins to the actin cytoskeleton, largely by binding to and activating the cytoskeletal protein vinculin, which binds to F-actin through the agency of its five-helix bundle tail (Vt) domain. Talin activates vinculin by means of buried amphipathic α-helices coined vinculin binding sites (VBSs) that reside within numerous four- and five-helix bundle domains that comprise the central talin rod, which are released from their buried locales by means of mechanical tension on the integrin:talin complex. In turn, these VBSs bind to the N-terminal seven-helix bundle (Vh1) domain of vinculin, creating an entirely new helix bundle that severs its head-tail interactions. Interestingly, talin harbors a second integrin binding site coined IBS2 that consists of two five-helix bundle domains that also contain a VBS (VBS50). Here we report the crystal structure of VBS50 in complex with vinculin at 2.3 Å resolution and show that intramolecular interactions of VBS50 within IBS2 are much more extensive versus its interactions with vinculin. Indeed, the IBS2-vinculin interaction only occurs at physiological temperature and the affinity of VBS50 for vinculin is about 30 times less than other VBSs. The data support a model where integrin binding destabilizes IBS2 to allow it to bind to vinculin.


    Organizational Affiliation

    Department of Cancer Biology, Cell Adhesion Laboratory, The Scripps Research Institute, Jupiter, Florida 33458, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
VinculinA258Homo 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
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Talin-1B29Homo sapiensMutation(s): 0 
Gene Names: TLN1KIAA1027TLN
Find proteins for Q9Y490 (Homo sapiens)
Explore Q9Y490 
Go to UniProtKB:  Q9Y490
NIH Common Fund Data Resources
PHAROS  Q9Y490
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.209 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.54α = 90
b = 68.16β = 90
c = 137.6γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
AutoPROCdata scaling
XDSdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-29
    Type: Initial release
  • Version 1.1: 2012-05-16
    Changes: Database references