Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 32.40 kDa 
• Atom Count: 2223 
• Residue Count: 284 
• Unique protein chains: 2

1RKC

Human vinculin head (1-258) in complex with talin's vinculin binding site 3 (residues 1944-1969)

• DOI: 10.2210/pdb1RKC/pdb

• Classification: cell adhesion, structural protein
• Organism(s): Homo sapiens, Gallus gallus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-11-21 Released: 2004-01-13 
• Deposition Author(s): Izard, T., Evans, G., Borgon, R.A., Rush, C.L., Bricogne, G., Bois, P.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.335 
• R-Value Work: 0.244 

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

• PubMed: 14702644 
• DOI: 10.1038/nature02281
• Primary Citation of Related Structures:  
  1RKE, 1RKC


• 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 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.

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Organizational Affiliation: 

Department of Hematology-Oncology, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Vinculin	A	262	Homo sapiens	Mutation(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

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Talin	B	26	Gallus gallus	Mutation(s): 0  Gene Names: TLN1, TLN
Find proteins for P54939 (Gallus gallus) Explore P54939  Go to UniProtKB:  P54939

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.335 
• R-Value Work: 0.244 
• Space Group: I 4₁ 3 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 155.68	α = 90
b = 155.68	β = 90
c = 155.68	γ = 90

Software Package:

Software Name	Purpose
d*TREK	data scaling
SCALA	data scaling
SHARP	phasing
BUSTER-TNT	refinement
d*TREK	data reduction
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-11-21 
• Released Date: 2004-01-13 
Deposition Author(s): Izard, T., Evans, G., Borgon, R.A., Rush, C.L., Bricogne, G., Bois, P.R.

Revision History 

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