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Alternative mechanisms of structuring biomembranes: Self-assembly vs. self-organization | | Karin John
; Markus Bar
; | | Date: |
22 Jun 2005 | | Subject: | Cell Behavior; Pattern Formation and Solitons; Biological Physics | q-bio.CB nlin.PS physics.bio-ph | | Abstract: | 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. | | Source: | arXiv, q-bio.CB/0506033 | | Services: | Forum | Review | PDF | Favorites | |
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