相关实验视频

Updated: Sep 16, 2025

Single Particle Cryo-Electron Microscopy: From Sample to Structure

Single Particle Cryo-Electron Microscopy: From Sample to Structure

Published on: May 29, 2021

泡薄膜玻璃化用于冷-EM

Yue Zhang¹, Biplob Nandy², Kasim Sader³

¹Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge, United Kingdom. yuezhang@mrc-lmb.cam.ac.uk.

Nature communications

|July 4, 2025

概括

一种新的无污点冷EM样品制备方法使用泡薄膜,以获得均的冰厚和更好的颗粒方向. 这种技术简化了结构生物学中的高分辨率结构确定.

科学领域:

结构生物学结构生物学
生物物理学的生物物理.
生物化学生物化学

背景情况:

电子冷显微镜 (cryo-EM) 是一种用于确定高分辨率结构的强大技术.
样本准备仍然是冷EM的重要瓶,在冰厚,空气-水接口效应和粒子方向方面存在挑战.
当前的方法往往导致不一致的结果,并阻碍了常规结构的确定.

研究的目的:

开发一种改进的冷EM样本制备方法.
为了解决玻璃化中的传统涂抹技术的局限性.
为了加强对冰厚和颗粒方向的控制,用于单颗粒分析.

主要方法:

引入无污点玻璃化技术,使用独立的,表面活性剂稳定泡膜.
使用泡薄膜来实现均的冰厚.
在玻璃化之前控制泡薄膜厚度.

主要成果:

在冷EM样本中达到均的冰厚.
通过调整泡薄膜厚度来证明对冰厚的控制.
观察到某些标本的方向分布效率有所提高.
减少了对碳支薄膜的颗粒吸附.

结论:

无污点泡膜方法简化了冷EM样本的准备工作.
改善对冰厚和粒子方向的控制可以加速结构的确定.
这种技术提供了一种简化方法,可以使用单颗粒分析来实现高分辨率结构.

更多相关视频

Preparation and Cryo-FIB micromachining of Saccharomyces cerevisiae for Cryo-Electron Tomography

Preparation and Cryo-FIB micromachining of Saccharomyces cerevisiae for Cryo-Electron Tomography

Published on: November 20, 2021

Preparing Lamellae from Vitreous Biological Samples Using a Dual-Beam Scanning Electron Microscope for Cryo-Electron Tomography

Preparing Lamellae from Vitreous Biological Samples Using a Dual-Beam Scanning Electron Microscope for Cryo-Electron Tomography

Published on: August 5, 2021

相关概念视频

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...