Macromolecule Content

• Total Structure Weight: 19379.87 
• Atom Count: 1357 
• Residue Count: 189 
• Unique protein chains: 1

2JSW

NMR structure of the talin C-terminal actin binding site

• DOI: 10.2210/pdb2JSW/pdb
• BMRB: 15411

• Classification: ACTIN-BINDING PROTEIN
• Organism(s): Mus musculus
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2007-07-17 Released: 2008-01-29 
• Deposition Author(s): Goult, B.T., Gingras, A.R., Bate, N., Critchley, D.R.C., Barsukov, I.L.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 

Literature

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.

(2007) Embo J. 27: 458-469

• PubMed: 18157087 
• DOI: 10.1038/sj.emboj.7601965
• Primary Citation of Related Structures:  
  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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Talin-1	A	189	Mus musculus	Mutation(s): 0  Gene Names: Tln1 (Tln)
Find proteins for P26039 (Mus musculus) Go to UniProtKB:  P26039

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 
• Olderado: 2JSW Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2007-07-17 
• Released Date: 2008-01-29 
• Deposition Author(s): Goult, B.T., Gingras, A.R., Bate, N., Critchley, D.R.C., Barsukov, I.L.

Revision History 

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