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Updated: Feb 27, 2026

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结构第一 - 通过冷电子显微镜的探索和发现

Miguel Ricardo Leung¹

¹Hubrecht Institute-KNAW and University Medical Center Utrecht, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands.

Journal of cell science

|February 26, 2026

概括

低温电子显微镜 (cryo-EM) 能够实现分子发现的结构第一方法. 这种技术有助于识别未知的蛋白质和相互作用,扩展结构生物学.

科学领域:

结构生物学结构生物学
分子生物学分子生物学
生物物理学的生物物理.

背景情况:

对生物系统的直接观察推动了生物学的发现.
低温电子显微镜 (cryo-EM) 提供了高分辨率的结构分析.
进步已经增加了冷EM的吞吐量,稳定性和可访问性.

研究的目的:

要突出冷电子显微镜在结构首先发现方法中的作用.
展示冷EM在分析各种生物样本方面的能力.
强调冷EM在识别新型蛋白质和相互作用方面的潜力.

主要方法:

电子显微镜 (cryo-EM) 用于高分辨率的结构分析.
机器学习辅助模型构建用于冷EM图.
蛋白质组学和交联质谱学用于蛋白质识别.

主要成果:

现在Cryo-EM分析了原生蛋白质复合体和细胞结构.
在冷EM研究中,越来越多地发现了未知的蛋白质.
分子身份可以从冷电磁图中得出,而无需事先的知识或标记.

结论:

化电磁场为分子探索提供了一个结构优先的方法.
结构生物学现在扩展到发现新型蛋白质和相互作用.
低温电磁波是一种强大的工具,可以揭示生物过程的分子基础.

关键词:

一个新的蛋白质鉴定.低温电子显微镜的使用方法低温电子断层扫描 (Cryo-electron tomography) 是一种电子断层扫描技术.

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Cryo-electron Microscopy

Cryo-electron Microscopy

Conventional electron microscopy (EM) involves dehydration, fixation, and staining of biological samples, which distorts the native state of biological molecules and results in several artifacts. Also, the high-energy electron beam damages the sample and makes it difficult to obtain high-resolution images. These issues can be addressed using cryo-EM, which uses frozen samples and gentler electron beams. The technique was developed by Jacques Dubochet, Joachim Frank, and Richard Henderson, for...

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...