Branching, Capping, and Severing in Dynamic Actin Structures

Details Branching, Capping, and Severing in Dynamic Actin Structures Branching, Capping, and Severing in Dynamic Actin Structures

2007-03-15

arxiv.org/abs/cond-mat/0703409v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.99.058103

Branched actin networks at the leading edge of a crawling cell evolve via protein-regulated processes such as polymerization, depolymerization, capping, branching, and severing. A formulation of these processes is presented and analyzed to study steady-state network morphology. In bulk, we identify several scaling regimes in severing and branching protein concentrations and find that the coupling between severing and branching is optimally exploited for conditions {\it in vivo}. Near the leading edge, we find qualitative agreement with the {\it in vivo} morphology.

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