Mechanochemical model for myosin V

Erin M. Craig, Heiner Linke

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

44 Citeringar (SciVal)


A rigorous numerical test of a hypothetical mechanism of a molecular motor should model explicitly the diffusive motion of the motor's degrees of freedom as well as the transition rates between the motor's chemical states. We present such a Brownian dynamics, mechanochemcial model of the coarse-grain structure of the dimeric, linear motor myosin V. Compared with run-length data, our model provides strong support for a proposed strain-controlled gating mechanism that enhances processivity. We demonstrate that the diffusion rate of a detached motor head during motor stepping is self-consistent with known kinetic rate constants and can explain the motor's key performance features, such as speed and stall force. We present illustrative and realistic animations of motor stepping in the presence of thermal noise. The quantitative success and illustrative power of this type of model suggest that it will be useful in testing our understanding of a range of biological and synthetic motors.
Sidor (från-till)18261-18266
TidskriftProceedings of the National Academy of Sciences
StatusPublished - 2009

Ämnesklassifikation (UKÄ)

  • Den kondenserade materiens fysik


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