Dynamics and mechanics of motor-filament systems |
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Authors: | K Kruse F Jülicher |
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Affiliation: | 1. Max-Planck-Institut für Physik komplexer Systeme, N?thnitzerstr. 38, 01187, Dresden, Germany
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Abstract: | Motivated by the cytoskeleton of eukaryotic cells, we develop a general framework for describing the large-scale dynamics
of an active filament network. In the cytoskeleton, active cross-links are formed by motor proteins that are able to induce
relative motion between filaments. Starting from pair-wise interactions of filaments via such active processes, our framework
is based on momentum conservation and an analysis of the momentum flux. This allows us to calculate the stresses in the filament
network generated by the action of motor proteins. We derive effective theories for the filament dynamics which can be related
to continuum theories of active polar gels. As an example, we discuss the stability of homogenous isotropic filament distributions
in two spatial dimensions. |
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Keywords: | 87 16 Ka Filaments microtubules their networks and supramolecular assemblies 87 16 Nn Motor proteins (myosin kinesin dynein) 87 16 -b Subcellular structure and processes |
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