时间解决的应用程序的Cryo-EM;方法,挑战和未来的方向
David P Klebl1, Louie Aspinall2, Stephen P Muench1
1School of Biomedical Sciences, Astbury Centre for Structural Molecular Biology, University of Leeds, UK.
Current opinion in structural biology
|September 16, 2023
概括
低温电子显微镜 (cryo-EM) 的进步使得捕获动态分子状态成为可能. 新的时间解决的冷EM方法正在出现,以更详细地研究短暂的生物过程.
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:
- 低温电子显微镜 (cryo-EM) 已经进步,提供了高分辨率的静态分子结构.
- 捕捉动态或短暂的分子构造仍然是一个挑战.
研究的目的:
- 提供新兴的时间解决的冷EM方法的概述.
- 讨论这些新技术的优点,局限性和挑战.
主要方法:
- 概述各种时间解析的冷电磁力学方法.
- 分析用于在毫秒时间尺度内捕获非平衡状态的技术.
主要成果:
- 新的方法允许捕捉和分析短暂的分子状态.
- 在实现更高分辨率和更快的时间框架方面发现了挑战.
结论:
- 时间解析的冷EM是冷EM工具包的宝贵补充.
- 这些方法扩大了单颗粒和断层扫描研究的可能性.
相关概念视频
01:28Cryo-electron Microscopy
3.4K
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...
3.4K
01:07Electron Microscope Tomography and Single-particle Reconstruction
2.4K
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...
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...
2.4K