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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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Updated: Jan 11, 2026

Cryo-EM and Single-Particle Analysis with Scipion

Cryo-EM and Single-Particle Analysis with Scipion

Published on: May 29, 2021

CryoAtom 改进了用于冷-EM 的模型构建.

Baoquan Su¹, Kun Huang², Zhenling Peng³

¹MOE Frontiers Science Center for Nonlinear Expectations, Research Center for Mathematics and Interdisciplinary Sciences, Shandong University, Qingdao, China.

Nature structural & molecular biology

|November 14, 2025

概括

此摘要是机器生成的。

CryoAtom通过调整AlphaFold2.2.来增强用于冷电子显微镜 (cryo-EM) 地图的原子模型构建. 这种新的方法提高了模型的完整性和准确性,即使在较低的分辨率,加速蛋白质结构的确定.

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Optimizing Sample Preparation for Cryogenic Electron Microscopy

Optimizing Sample Preparation for Cryogenic Electron Microscopy

Published on: April 11, 2025

Do's and Don'ts of Cryo-electron Microscopy: A Primer on Sample Preparation and High Quality Data Collection for Macromolecular 3D Reconstruction

Do's and Don'ts of Cryo-electron Microscopy: A Primer on Sample Preparation and High Quality Data Collection for Macromolecular 3D Reconstruction

Published on: January 9, 2015

相关实验视频

Last Updated: Jan 11, 2026

Cryo-EM and Single-Particle Analysis with Scipion

Cryo-EM and Single-Particle Analysis with Scipion

Published on: May 29, 2021

Optimizing Sample Preparation for Cryogenic Electron Microscopy

Optimizing Sample Preparation for Cryogenic Electron Microscopy

Published on: April 11, 2025

Do's and Don'ts of Cryo-electron Microscopy: A Primer on Sample Preparation and High Quality Data Collection for Macromolecular 3D Reconstruction

Do's and Don'ts of Cryo-electron Microscopy: A Primer on Sample Preparation and High Quality Data Collection for Macromolecular 3D Reconstruction

Published on: January 9, 2015

科学领域:

结构生物学结构生物学
生物物理学的生物物理.
计算生物学计算生物学

背景情况:

从冷电子显微镜 (cryo-EM) 密度图构建原子模型对于理解分子机制至关重要.
目前用于冷EM中新建模型的现有方法在完整性和分辨率要求方面存在局限性.

研究的目的:

介绍CryoAtom,这是一个新的计算方法,用于在cryo-EM地图中新建模型.
为了利用AlphaFold2的进步,调整它以提高与冷EM数据的性能.

主要方法:

CryoAtom通过将全球注意力替换为局部注意力机制来修改AlphaFold2.
整合了一种新的三维旋转位置嵌入,以更好地利用冷EM地图信息.
这种方法在三个大型的冷电磁图上进行了测试.

主要成果:

CryoAtom可以生成更完整的原子模型,并减少对高分辨率地图的需求.
该方法成功识别了以前未被描述的蛋白质,并模拟了结构变化.
它证明了大型复合体 (例如104种蛋白质) 的高效建模和非蛋白质组件的隔离.

结论:

CryoAtom代表了在准确的模型构建中的重大进步,用于冷-EM结构的确定.
该方法加快了过程,并提高了从冷电磁数据中获得的原子模型的质量.
CryoAtom是公开的,这有助于在结构生物学研究中采用它.