Analysis of microtubule motion due to drag from kinesin walkers

Details Analysis of microtubule motion due to drag from kinesin walkers Analysis of microtubule motion due to drag from kinesin walkers

2011-02-25

arxiv.org/abs/1102.5141v1

Biology

Quantitative Biology

Biomolecules

14 pages, 6 figures

Scientific paper

We analyze the nonlinear waves that propagate on a microtubule that is tethered at its minus end due to kinesin walking on it, as is seen during the fluid mixing caused by cytoplasmic streaming in Drosophila oocytes.The model we use assumes that the microtubule can be modeled as an elastic string in a viscous medium. The effect of the kinesin is to apply a force tangential to the microtubule and we also consider the addition of a uniform cytoplasmic velocity field. We show that travelling wave solutions exist and analyze their properties. There exist scale invariant families of solutions and solutions can exist that are flat or helical. The relationship between the period and wavelength is obtained by both analytic and numerical means. Numerical implementation of the equation of motion verifies our analytical predictions.

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