Aging of dynamically stabilized microtubules

Details Aging of dynamically stabilized microtubules Aging of dynamically stabilized microtubules

2009-12-23

arxiv.org/abs/0912.4611v1

Physics

Biological Physics

article: 11 pages, 4 figures; supplementary material: 11 pages, 3 figures

Scientific paper

The microtubule network, an important part of the cytoskeleton, is constantly remodeled by alternating phases of growth and shrinkage of individual filaments. Plus-end tracking proteins (+TIPs) interact with the microtubule and in many cases alter its dynamics. While it is established that the prototypal CLIP-170 enhances microtubule stability by increasing rescues, the plus-end tracking mechanism is still under debate. We present a model for microtubule dynamics in which a rescue factor is dynamically added to the filament while growing. As a consequence, the filament shows aging behavior which should be experimentally accessible and thus allow one to exclude some hypothesized models of the inclusion of rescue factors at the microtubule plus end. Additionally, we show the strong influence of the cell geometry on the quantitative results.

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