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Related Concept Videos

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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Electron Microscope Tomography and Single-particle Reconstruction01:07

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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.
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Advancing High-Resolution Imaging of Virus Assemblies in Liquid and Ice
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Virus structures revealed by advanced cryoelectron microscopy methods.

Dongjie Zhu1, Duanfang Cao2, Xinzheng Zhang2

  • 1National Laboratory of Biomacromolecules, CAS Center for Excellence in Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China.

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|October 5, 2023
PubMed
Summary
This summary is machine-generated.

Advanced cryo-electron microscopy (cryo-EM) methods enable high-resolution virus structure determination. This review covers techniques like single-particle analysis (SPA) and cryo-electron tomography (cryo-ET) for understanding viral structures and dynamics.

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Area of Science:

  • Structural Biology
  • Virology
  • Microscopy

Background:

  • Cryo-electron microscopy (cryo-EM) single-particle analysis (SPA) historically achieved high resolutions for symmetrical viruses.
  • Viral structures are diverse and undergo conformational changes, necessitating advanced imaging techniques.

Purpose of the Study:

  • To review advanced cryo-EM methods for high-resolution virus structure determination.
  • To summarize achievements and discuss challenges in viral structure analysis using cryo-EM.

Main Methods:

  • Asymmetric reconstruction
  • Ewald sphere correction
  • Cryo-electron tomography (cryo-ET)
  • Sub-tomogram averaging (STA)

Main Results:

  • Cryo-EM methods have been successfully applied to determine complex virus structures.
  • Advanced techniques allow for in vivo and in vitro structural analysis of viruses.

Conclusions:

  • Current advanced cryo-EM methods offer powerful tools for high-resolution viral structure determination.
  • Addressing persistent challenges will further enhance our understanding of virus structures and functions.