Alternative mechanisms of structuring biomembranes: Self-assembly vs. self-organization

Details Alternative mechanisms of structuring biomembranes: Self-assembly vs. self-organization Alternative mechanisms of structuring biomembranes: Self-assembly vs. self-organization

2005-06-22

arxiv.org/abs/q-bio/0506033v2

Phys. Rev. Lett. 96 (2005) 198101

Biology

Quantitative Biology

Cell Behavior

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.95.198101

We study two mechanisms for the formation of protein patterns near membranes of living cells by mathematical modelling. Self-assembly of protein domains by electrostatic lipid-protein interactions is contrasted with self-organization due to a nonequilibrium biochemical reaction cycle of proteins near the membrane. While both processes lead eventually to quite similar patterns, their evolution occurs on very different length and time scales. Self-assembly produces periodic protein patterns on a spatial scale below 0.1 micron in a few seconds followed by extremely slow coarsening, whereas self-organization results in a pattern wavelength comparable to the typical cell size of 100 micron within a few minutes suggesting different biological functions for the two processes.

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