Sequence heterogeneity and the dynamics of molecular motors

Details Sequence heterogeneity and the dynamics of molecular motors Sequence heterogeneity and the dynamics of molecular motors

2005-06-30

arxiv.org/abs/cond-mat/0506797v1

Physics

Condensed Matter

Statistical Mechanics

To appear in a JPhys special issue on molecular motors

Scientific paper

The effect of sequence heterogeneity on the dynamics of molecular motors is reviewed and analyzed using a set of recently introduced lattice models. First, we review results for the influence of heterogenous tracks such as a single-strand of DNA or RNA on the dynamics of the motors. We stress how the predicted behavior might be observed experimentally in anomalous drift and diffusion of motors over a wide range of parameters near the stall force and discuss the extreme limit of strongly biased motors with one-way hopping. We then consider the dynamics in an environment containing a variety of different fuels which supply chemical energy for the motor motion, either on a heterogeneous or on a periodic track. The results for motion along a periodic track are relevant to kinesin motors in a solution with a mixture of different nucleotide triphosphate fuel sources.

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