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- W2037863769 abstract "We present a model study of gliding assays in which actin filaments are moved by non-processive myosin motors. We show that even if the power stroke of the motor protein has no lateral asymmetry, the filaments will move in a helical, rather than straight fashion. Notably, the handedness of this twirling motion is the opposite from that of the actin filaments. It stems from the fact that the gliding actin filament has “target zones” where its subunits are oriented towards the surface and are therefore more accessible for myosin heads. Because each myosin head has a higher binding probability before it reaches the center of the target zone than afterwards, this results in a left-handed helical motion of the actin filament. We present a stochastic simulation and an approximative analytical solution to study this effect. We show that the pitch of the helix depends on the filament velocity, which in turn depends on the ATP concentration. It reaches about 400nm for slow gliding and increases with higher speeds. These values are in good agreement with recent experiments." @default.
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- W2037863769 date "2009-02-01" @default.
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- W2037863769 title "The Mechanism of Filament Rotation in Gliding Assays with Non-Processive Myosin Motors" @default.
- W2037863769 doi "https://doi.org/10.1016/j.bpj.2008.12.3880" @default.
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