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相关概念视频

Cryo-electron Microscopy01:28

Cryo-electron Microscopy

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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...
3.3K
Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron 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...
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相关实验视频

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A Pipeline to Investigate the Structures and Signaling Pathways of Sphingosine 1-Phosphate Receptors
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A Pipeline to Investigate the Structures and Signaling Pathways of Sphingosine 1-Phosphate Receptors

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在GPCR结构确定方面,冷电磁技术取得了进展.

Wataru Shihoya1, Aika Iwama1, Fumiya K Sano1

  • 1Department of Biological Sciences, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo 113-0033, Japan.

Journal of biochemistry
|March 18, 2024
PubMed
概括

低温电子显微镜 (cryo-EM) 提高了对G蛋白结合受体 (GPCRs) 的结构理解. 这篇评论详细介绍了如何使用纳米体等工具的冷EM揭示了用于药物发现的GPCR激活机制.

科学领域:

  • 生物化学和结构生物学
  • 分子和细胞生物学分子和细胞生物学

背景情况:

  • G蛋白结合受体 (GPCRs) 对细胞通信和药物标至关重要.
  • 对于GPCRs来说,获得高分辨率的结构数据历来是具有挑战性的.
  • GPCR被分为六个不同的家族 (A-F).

研究的目的:

  • 审查冷电子显微镜 (cryo-EM) 对确定GPCR-G蛋白复合结构的影响.
  • 要突出那些有助于GPCR结构确定的技术.
  • 讨论不同类别的GPCR激活期间的结构变化.

主要方法:

  • 低温电子显微镜 (cryo-EM) 用于高分辨率的结构分析.
  • 使用稳定剂,如纳米体和迷你G蛋白.
  • 对不同GPCR类的结构数据进行比较分析.

主要成果:

  • 化EM已经克服了以前在获得高分辨率GPCR结构方面的局限性.
  • 纳米体和迷你G蛋白有效地稳定GPCR-G蛋白复合体用于成像.
  • 对于各种GPCR类,在激活时已经阐明了各种结构变化.

结论:

关键词:
与G蛋白结合受体的受体是G蛋白结合受体.低温电磁波冷却器 (Cryo-EM) 是一个非常好的方法.结构生物学结构生物学

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

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Author Spotlight: Exploring Cellular Processes by Modeling Ligands in Cryo-EM Maps
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Author Spotlight: Exploring Cellular Processes by Modeling Ligands in Cryo-EM Maps

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相关实验视频

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

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Author Spotlight: Exploring Cellular Processes by Modeling Ligands in Cryo-EM Maps
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  • 化电磁波为了解GPCR结构和功能提供了坚实的基础.
  • 这种结构性洞察对于推动药物发现和对GPCRs的治疗向至关重要.
  • 未来的研究很可能会利用冷-EM用于基于GPCR的新型治疗方法.