Near-critical fluctuations and cytoskeleton-assisted phase separation lead to subdiffusion in cell membranes

Details Near-critical fluctuations and cytoskeleton-assisted phase separation lead to subdiffusion in cell membranes Near-critical fluctuations and cytoskeleton-assisted phase separation lead to subdiffusion in cell membranes

2010-10-06

arxiv.org/abs/1010.1207v2

Biophysical Journal 100 (2011) 80

Physics

Biological Physics

21 pages, 5 figures; Supporting Material 5 pages, 1 figure, 1 table

Scientific paper

10.1016/j.bpj.2010.11.002

We address the relationship between membrane microheterogeneity and anomalous subdiffusion in cell membranes by carrying out Monte Carlo simulations of two-component lipid membranes. We find that near-critical fluctuations in the membrane lead to transient subdiffusion, while membrane-cytoskeleton interaction strongly affects phase separation, enhances subdiffusion, and eventually leads to hop diffusion of lipids. Thus, we present a minimum realistic model for membrane rafts showing the features of both microscopic phase separation and subdiffusion.

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