Boundary-induced orientation of dynamic filament networks and vesicle agglomerations

Details Boundary-induced orientation of dynamic filament networks and vesicle agglomerations Boundary-induced orientation of dynamic filament networks and vesicle agglomerations

2011-06-28

arxiv.org/abs/1106.5733v1

Physics

Biological Physics

4 pages, 6 figures. Submitted to Physical Review Letters

Scientific paper

We find a statistical mechanism that can adjust orientations of intracellular filaments to cell geometry in absence of organizing centers. The effect is based on random and isotropic filament (de-)polymerization dynamics and is independent of filament interactions and explicit regulation. It can be understood by an analogy to electrostatics and appears to be induced by the confining boundaries; for periodic boundary conditions no orientational bias emerges. Including active transport of particles, the model reproduces experimental observations of vesicle accumulations in transected axons.

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