Phase separation in biological membranes: integration of theory and experiment.

Phase separation in biological membranes: integration of theory and experiment.
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DOI:
10.1146/annurev.biophys.093008.131238
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发表时间:
2010
影响因子:
12.4
通讯作者:
Genin GM
Genin GM
中科院分区:
生物学1区
文献类型:
--
作者:
Elson EL;Fried E;Dolbow JE;Genin GM

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脂质双层模型膜可以经历有序相和无序相之间的转变,并且含有脂质物质的混合物的膜可以经历相分离。对这些转变的研究是有趣的,因为它们可以告诉我们不同种类和构象的脂质分子的相互作用能。纳米相可以为细胞膜中具有重要生物学功能的膜筏提供模型。重要的问题是脂质纳米结构域是否可以在膜中稳定平衡存在,以及它们在不同组成的膜中的尺寸分布如何。了解纳米畴的寿命也很重要。理论方法提供了许多重要的信息,这些问题,但需要更好的实验方法来检测和表征在正常的膜条件下的纳米畴。本文综述了脂双层模型膜相分离的理论和实验研究之间的联系。
Lipid bilayer model membranes can undergo transitions between ordered and disordered phases, and membranes that contain a mixture of lipid species can undergo phase separations. Studies of these transformations are of interest for what they can tell us about the interaction energies of lipid molecules of different species and conformations. Nanoscopic phases can provide a model for membrane rafts, which have important biological functions in cell membranes. Important questions are whether lipid nanodomains can exist in stable equilibrium in membranes and what is the distribution of their sizes in membranes of different composition. It is also important to know the lifetimes of nanodomains. Theoretical methods have supplied much important information on these questions, but better experimental methods are needed to detect and characterize nanodomains under normal membrane conditions. This review summarizes linkages between theoretical and experimental studies of phase separation in lipid bilayer model membranes.
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