3S90: Human vinculin head domain Vh1 (residues 1-252) in complex with murine talin (VBS33; residues 1512-1546)

The cytoskeletal proteins talin and vinculin are localized at cell-matrix junctions and are key regulators of cell signaling, adhesion, and migration. Talin couples integrins via its FERM domain to F-actin and is an important regulator of integrin activation and clustering. The 220 kDa talin rod domain comprises several four- and five-helix bundles that harbor amphipathic alpha-helical vinculin binding sites (VBSs). In its inactive state, the hydrophobic VBS residues involved in binding to vinculin are buried within these helix bundles, and the mechanical force emanating from bound integrin receptors is thought necessary for their release and binding to vinculin. The crystal structure of a four-helix bundle of talin that harbors one of these VBSs, coined VBS33, was recently determined. Here we report the crystal structure of VBS33 in complex with vinculin at 2 A resolution. Notably, comparison of the apo and vinculin bound structures shows that intermolecular interactions of the VBS33 alpha-helix with vinculin are more extensive than the intramolecular interactions of the VBS33 within the talin four-helix bundle.
PDB ID: 3S90Download
MMDB ID: 92031
PDB Deposition Date: 2011/5/31
Updated in MMDB: 2012/12
Experimental Method:
x-ray diffraction
Resolution: 1.97  Å
Source Organism:
Mus musculus
Similar Structures:
Biological Unit for 3S90: dimeric; determined by author and by software (PISA)
Molecular Components in 3S90
Label Count Molecule
Proteins (2 molecules)
Vinculin(Gene symbol: VCL)
Molecule annotation
Talin-1(Gene symbol: Tln1)
Molecule annotation
* Click molecule labels to explore molecular sequence information.

Citing MMDB