2013
DOI: 10.1073/pnas.1218407110
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Actin depolymerization under force is governed by lysine 113:glutamic acid 195-mediated catch-slip bonds

Abstract: As a key element in the cytoskeleton, actin filaments are highly dynamic structures that constantly sustain forces. However, the fundamental question of how force regulates actin dynamics is unclear. Using atomic force microscopy force-clamp experiments, we show that tensile force regulates G-actin/G-actin and G-actin/F-actin dissociation kinetics by prolonging bond lifetimes (catch bonds) at a low force range and by shortening bond lifetimes (slip bonds) beyond a threshold. Steered molecular dynamics simulati… Show more

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Cited by 68 publications
(105 citation statements)
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References 48 publications
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“…In general, the lifetime of the receptor-ligand bond exponentially decreases with an increase of the mechanical force (3). However, there is growing evidence demonstrating that the lifetimes of some receptorligand bonds increase when moderate levels of force are applied (4)(5)(6)(7)(8)(9). However, the underlying mechanism of this phenomenon is still elusive and in some cases controversial.…”
Section: E7304-e7305mentioning
confidence: 99%
See 1 more Smart Citation
“…In general, the lifetime of the receptor-ligand bond exponentially decreases with an increase of the mechanical force (3). However, there is growing evidence demonstrating that the lifetimes of some receptorligand bonds increase when moderate levels of force are applied (4)(5)(6)(7)(8)(9). However, the underlying mechanism of this phenomenon is still elusive and in some cases controversial.…”
Section: E7304-e7305mentioning
confidence: 99%
“…This model proposes that force tilts the binding interface to make it parallel to the direction of force, allowing the selectin ligand to slide on the selectin and to form new contacts. The sliding-rebinding model has also been used to explain the force-induced activation of von Willebrand factor-mediated adhesion and actin depolymerization (6,8).…”
Section: E7304-e7305mentioning
confidence: 99%
“…Since the initial demonstration of the P-selectin complex binding to PSGL-1 as a catch bond (35), these bonds have been demonstrated for integrins (27,36), actomyosin (37), bacterial adhesion FimH (38), platelet glycoprotein Ibα (39), kinetochore protein (40), cadherin (41), and actin (42). Here we provide a definitive physiologic demonstration of catch bond regulation by a semaphorin signaling through a plexin.…”
Section: Discussionmentioning
confidence: 64%
“…Surprisingly, we find a complex mechanical regulation of adhesive bonds at the single-molecule level: tensile force prolongs the bond lifetime (that is, catch bonds). In contrast to the well-known catch bonds of bimolecular systems, such as cell adhesion receptors (integrins 28,38,39 , selectins 40,41 , glycoprotein Iba 30,42 , E-cadherin 43 and FimH 44 ), the T-cell receptor 31 and cytoskeletal linkages 45,46 , the Thy-1 catch bond is strongly correlated with a bond-stiffening phenotype, termed 'dynamic catch', which partially shifts force to the already engaged but unstretched coreceptor Syn4. Thus, the data reveal a unique, previously unreported class of receptor-ligand bonds whereby force tightens co-receptor engagement that is required for forcemediated adhesion signalling.…”
mentioning
confidence: 99%