UNIGE document Scientific Article
previous document  unige:100205  next document
add to browser collection

Mechanical stability of talin rod controls cell migration and substrate sensing

Rahikainen, Rolle
von Essen, Magdaléna
Schaefer, Markus
Qi, Lei
Azizi, Latifeh
Kelly, Conor
Ihalainen, Teemu O
show hidden authors show all authors [1 - 11]
Published in Scientific Reports. 2017, vol. 7, no. 1, p. 3571
Abstract Cells adhere to the surrounding tissue and probe its mechanical properties by forming cell-matrix adhesions. Talin is a critical adhesion protein and participates in the transmission of mechanical signals between extracellular matrix and cell cytoskeleton. Force induced unfolding of talin rod subdomains has been proposed to act as a cellular mechanosensor, but so far evidence linking their mechanical stability and cellular response has been lacking. Here, by utilizing computationally designed mutations, we demonstrate that stepwise destabilization of the talin rod R3 subdomain decreases cellular traction force generation, which affects talin and vinculin dynamics in cell-matrix adhesions and results in the formation of talin-rich but unstable adhesions. We observed a connection between talin stability and the rate of cell migration and also found that talin destabilization affects the usage of different integrin subtypes and sensing of extracellular matrix proteins. Experiments with truncated forms of talin confirm the mechanosensory role of the talin R3 subdomain and exclude the possibility that the observed effects are caused by the release of talin head-rod autoinhibition. In conclusion, this study provides evidence into how the controlled talin rod domain unfolding acts as a key regulator of adhesion structure and function and consequently controls central cellular processes such as cell migration and substrate sensing.
PMID: 28620171
Full text
Article (Published version) (10.2 MB) - public document Free access
Research group Migration cellulaire (645)
(ISO format)
RAHIKAINEN, Rolle et al. Mechanical stability of talin rod controls cell migration and substrate sensing. In: Scientific Reports, 2017, vol. 7, n° 1, p. 3571. doi: 10.1038/s41598-017-03335-2 https://archive-ouverte.unige.ch/unige:100205

334 hits



Deposited on : 2017-12-12

Export document
Format :
Citation style :