The application of Poisson distribution statistics in ion channel reconstitution to determine oligomeric architecture.

The application of Poisson distribution statistics in ion channel reconstitution to determine oligomeric architecture.
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DOI:
10.1016/bs.mie.2021.02.018
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发表时间:
2021
影响因子:
--
通讯作者:
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中科院分区:
生物学4区
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在重构过程中,膜蛋白根据泊松分布统计随机插入脂质体中。当重构混合物中的蛋白质与脂质的比例系统地变化时,这种统计捕获的特征允许关于蛋白质本身的推断,例如组装成单个功能单元的亚基的数量。本章介绍了泊松分布作为适用于重组膜蛋白成脂蛋白体,并侧重于一个应用程序,使此统计行为是用来确定组装成一个功能孔的离子通道亚基的数量。强调了执行这些实验的实际考虑。利用泊松稀释统计提供了一种基于功能的方法来确定离子通道寡聚化,补充其他生物物理,生物化学或结构方法。
During reconstitution, membrane proteins are randomly inserted into liposomes according to Poisson distribution statistics. When the protein to lipid ratios in the reconstitution mixture are varied systematically, the characteristics of this statistical capture permit inferences about the proteins themselves, such as the number of subunits that assemble into a single functional unit. This chapter describes the Poisson distribution as applied to the reconstitution of membrane proteins into proteoliposomes and focuses on an application whereby this statistical behavior is used to determine the number of ion channel subunits that assemble into a functional pore. Practical considerations for performing these experiments are emphasized. Harnessing Poisson dilution statistics provides a function-based method to determine ion channel oligomerization, complementing other biophysical, biochemical, or structural approaches.
通过单分子荧光显微镜测量脂质双层中的膜蛋白二聚化平衡。
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