Actomyosin-dependent formation of the mechanosensitive talin–vinculin complex reinforces actin anchoring View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2014-12

AUTHORS

Corina Ciobanasu, Bruno Faivre, Christophe Le Clainche

ABSTRACT

The force generated by the actomyosin cytoskeleton controls focal adhesion dynamics during cell migration. This process is thought to involve the mechanical unfolding of talin to expose cryptic vinculin-binding sites. However, the ability of the actomyosin cytoskeleton to directly control the formation of a talin-vinculin complex and the resulting activity of the complex are not known. Here we develop a microscopy assay with pure proteins in which the self-assembly of actomyosin cables controls the association of vinculin to a talin-micropatterned surface in a reversible manner. Quantifications indicate that talin refolding is limited by vinculin dissociation and modulated by the actomyosin network stability. Finally, we show that the activation of vinculin by stretched talin induces a positive feedback that reinforces the actin-talin-vinculin association. This in vitro reconstitution reveals the mechanism by which a key molecular switch senses and controls the connection between adhesion complexes and the actomyosin cytoskeleton. More... »

PAGES

3095

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/ncomms4095

DOI

http://dx.doi.org/10.1038/ncomms4095

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1044571117

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/24452080


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