Model for the unidirectional motion of a dynein molecule

Details Model for the unidirectional motion of a dynein molecule Model for the unidirectional motion of a dynein molecule

2008-04-24

arxiv.org/abs/0804.3911v1

Phys. Rev. E 77, 051916 (2008)

Physics

Condensed Matter

Statistical Mechanics

10 pages, 5 figures

Scientific paper

10.1103/PhysRevE.77.051916

Cytoplasmic dyneins transport cellular organelles by moving on a microtubule filament. It has been found recently that depending on the applied force and the concentration of the adenosine triphosphate (ATP) molecules, dynein's step size varies. Based on these studies, we propose a simple model for dynein's unidirectional motion taking into account the variations in its step size. We study how the average velocity and the relative dispersion in the displacement vary with the applied load. The model is amenable to further extensions by inclusion of details associated with the structure and the processivity of the molecule.

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