Cryo-EM: A Unique Tool for the Visualization of Macromolecular Complexity.

Cryo-EM: A Unique Tool for the Visualization of Macromolecular Complexity.
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DOI:
10.1016/j.molcel.2015.02.019
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发表时间:
2015-05-21
期刊:
影响因子:
16
通讯作者:
Scheres, Sjors H. W.
Scheres, Sjors H. W.
中科院分区:
生物学1区
文献类型:
--
作者:
Nogales, Eva;Scheres, Sjors H. W.

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三维冷冻电子显微镜(cryo-EM)是一种不断扩展的结构生物学技术,最近在其可实现的分辨率及其对具有挑战性的生物系统的研究的适用性方面经历了一个飞跃。由于不需要结晶,只需要少量的样品,而且,由于图像可以在计算机中分类,该技术有可能处理组成和构象的混合物。因此,cryo-EM可用于研究不同功能状态下的完整和全功能的大分子复合物,提供丰富的生物学见解。在这篇综述中,我们的一些原则背后的冷冻EM方法的单粒子分析,并讨论了一些最新的结果,其应用具有挑战性的系统至关重要的生物学意义。我们特别强调新方法的发展,这些发展导致新研究的激增,其中许多研究正在达成几年前只能梦想的决议。
Three-dimensional cryo-electron microscopy (cryo-EM) is an expanding structural biology technique that has recently undergone a quantum leap progression in its achievable resolution and its applicability to the study of challenging biological systems. Because crystallization is not required, only small amounts of sample are needed, and, because images can be classified in a computer, the technique has the potential to deal with compositional and conformational mixtures. Therefore, cryo-EM can be used to investigate complete and fully functional macromolecular complexes in different functional states, providing a richness of biological insight. In this review we underlie some of the principles behind the cryo-EM methodology of single particle analysis and discuss some recent results of its application to challenging systems of paramount biological importance. We place special emphasis on new methodological developments that are leading to an explosion of new studies, many of which are reaching resolutions that could only be dreamed of only a couple of years ago.
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