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相关概念视频

Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

2.5K
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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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...
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相关实验视频

Updated: Sep 10, 2025

Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging
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Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging

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基于里埃的多切片重建在冷电子断层扫描

Ranhao Zhang1, Yuan Shen2, Xueming Li3

  • 1Key Laboratory for Protein Sciences of Ministry of Education, School of Life Sciences, Tsinghua University, Beijing 100084, China; Beijing Frontier Research Center for Biological Structure, Beijing 100084, China; Tsinghua-Peking Joint Center for Life Sciences, Beijing 100084, China; State Key Laboratory of Membrane Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China; School of Life Sciences, Tsinghua University, Beijing 100084, China; Department of Electronic Engineering, Tsinghua University, Beijing 100084, China; Beijing National Research Center for Information Science and Technology, Tsinghua University, Beijing 100084, China.

Ultramicroscopy
|August 20, 2025
PubMed
概括

我们开发了MULtiple Slice技术 (MUST),一种用于冷电子断层扫描 (cryoET) 的新福里埃空间算法. 必须能够高效,高分辨率的断层图像重建和处理,克服当前方法的局限性.

关键词:
3D-CTF的纠正别名使用低温电子断层扫描在现场结构断层图像重建

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Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions
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Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions

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Strategies for Optimization of Cryogenic Electron Tomography Data Acquisition

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相关实验视频

Last Updated: Sep 10, 2025

Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging
08:55

Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging

Published on: July 12, 2022

5.2K
Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions
13:43

Correlative Microscopy for 3D Structural Analysis of Dynamic Interactions

Published on: June 24, 2013

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Strategies for Optimization of Cryogenic Electron Tomography Data Acquisition
08:16

Strategies for Optimization of Cryogenic Electron Tomography Data Acquisition

Published on: March 19, 2021

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科学领域:

  • 结构生物学
  • 生物物理
  • 显微镜图像处理

背景情况:

  • 低温电子断层扫描 (cryoET) 从倾斜系列显微镜重建3D细胞和病毒结构.
  • 图像处理,包括过和CTF校正,对于下游分析至关重要.
  • 由于福里埃空间的计算挑战,目前的断层图形重建通常依赖于实时空间方法.

研究的目的:

  • 介绍一个新的福里埃空间算法用于冷ET的断层图像重建.
  • 在福里埃空间处理大型断层图的计算挑战.
  • 提高冷ET重建的效率和分辨率.

主要方法:

  • 开发了MULtiple Slice Technique (MUST) 一种富里埃空间算法,可以逐片重建断层图像.
  • 实施了MUST的权重策略,以确保与WBP和SIRT等实体空间方法的兼容性.
  • 在MUST中制定了福里埃空间CTF校正的3DCTF模型.

主要成果:

  • 必须实现无别名重建和像素级并行计算.
  • 这种算法与现实空间重建技术的兼容性得到证明.
  • 在以图谱为基础的亚图谱平均值中成功应用MUST,实现了近原子分辨率.

结论:

  • 必须提供一个计算高效和有效的里埃空间方法来进行冷ET断层图像重建.
  • 这种技术可以对生物样本进行高分辨率的结构分析.
  • 这代表了冷ET图像处理和数据分析的重大进步.