Crystal structure of the talin dimerisation domain

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.257 

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The structure of the C-terminal actin-binding domain of talin.

Gingras, A.R.Bate, N.Goult, B.T.Hazelwood, L.Canestrelli, I.Grossmann, J.G.Liu, H.Putz, N.S.Roberts, G.C.Volkmann, N.Hanein, D.Barsukov, I.L.Critchley, D.R.

(2008) EMBO J 27: 458-469

  • DOI: https://doi.org/10.1038/sj.emboj.7601965
  • Primary Citation of Related Structures:  
    2JSW, 2QDQ

  • PubMed Abstract: 

    Talin is a large dimeric protein that couples integrins to cytoskeletal actin. Here, we report the structure of the C-terminal actin-binding domain of talin, the core of which is a five-helix bundle linked to a C-terminal helix responsible for dimerisation. The NMR structure of the bundle reveals a conserved surface-exposed hydrophobic patch surrounded by positively charged groups. We have mapped the actin-binding site to this surface and shown that helix 1 on the opposite side of the bundle negatively regulates actin binding. The crystal structure of the dimerisation helix reveals an antiparallel coiled-coil with conserved residues clustered on the solvent-exposed face. Mutagenesis shows that dimerisation is essential for filamentous actin (F-actin) binding and indicates that the dimerisation helix itself contributes to binding. We have used these structures together with small angle X-ray scattering to derive a model of the entire domain. Electron microscopy provides direct evidence for binding of the dimer to F-actin and indicates that it binds to three monomers along the long-pitch helix of the actin filament.

  • Organizational Affiliation

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

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B
50Mus musculusMutation(s): 0 
Gene Names: Tln1Tln
Find proteins for P26039 (Mus musculus)
Explore P26039 
Go to UniProtKB:  P26039
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26039
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.257 
  • Space Group: P 41 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.82α = 90
b = 98.82β = 90
c = 98.82γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PDB_EXTRACTdata extraction
DNAdata collection
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-01-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-09-27
    Changes: Data collection
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references