期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2010
卷号：107
期号：18
页码：8071-8078
DOI：10.1073/pnas.0911036107
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Min proteins of the Escherichia coli cell division system oscillate between the cell poles in vivo. In vitro on a solid-surface supported lipid bilayer, these proteins exhibit a number of interconverting modes of collective ATP-driven dynamic pattern formation including not only the previously described propagating waves, but also near uniformity in space surface concentration oscillation, propagating filament like structures with a leading head and decaying tail and moving and dividing amoeba-like structures with sharp edges. We demonstrate that the last behavior most closely resembles in vivo system behavior. The simple reaction-diffusion models previously proposed for the Min system fail to explain the results of the in vitro self-organization experiments. We propose the hypotheses that initiation of MinD binding to the surface is controlled by counteraction of initiation and dissociation complexes; the binding of MinD/E is stimulated by MinE and involves polymerization-depolymerization dynamics; polymerization of MinE over MinD oligomers triggers dynamic instability leading to detachment from the membrane. The physical properties of the lipid bilayer are likely to be one of the critical determinants of certain aspects of the dynamic patterns observed.
关键词：cell division ; min system ; oscillations and waves ; self-organization ; septum localization
