Biology – Quantitative Biology – Cell Behavior
Scientific paper
2008-06-04
Biology
Quantitative Biology
Cell Behavior
31 pages, 5 figures
Scientific paper
10.1529/biophysj.108.134783
We present the first numerical simulation of actin-driven propulsion by elastic filaments. Specifically, we use a Brownian dynamics formulation of the dendritic nucleation model of actin-driven propulsion. We show that the model leads to a self-assembled network that exerts forces on a disk and pushes it with an average speed. This simulation approach is the first to observe a speed that varies non-monotonically with the concentration of branching proteins (Arp2/3), capping protein and depolymerization rate (ADF), in accord with experimental observations. Our results suggest a new interpretation of the origin of motility that can be tested readily by experiment.
Lee Kun-Chun
Liu Andrea J.
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