Collective dynamics of molecular motors pulling on fluid membranes

Details Collective dynamics of molecular motors pulling on fluid membranes Collective dynamics of molecular motors pulling on fluid membranes

2005-12-08

arxiv.org/abs/q-bio/0512018v1

Phys. Rev. Lett. 97, 038101 (2006)

Biology

Quantitative Biology

Subcellular Processes

5 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.97.038101

The collective dynamics of $N$ weakly coupled processive molecular motors are considered theoretically. We show, using a discrete lattice model, that the velocity-force curves strongly depend on the effective dynamic interactions between motors and differ significantly from a simple mean field prediction. They become essentially independent of $N$ if it is large enough. For strongly biased motors such as kinesin this occurs if $N\gtrsim 5$. The study of a two-state model shows that the existence of internal states can induce effective interactions.

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