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Related Concept Videos

Cryo-electron Microscopy01:28

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...
Preparation of Samples for Electron Microscopy01:20

Preparation of Samples for Electron Microscopy

To be visualized by an electron microscope, either transmission or scanning, biological samples need to be fixed (stabilized) so the electron beam does not destroy them and dried thoroughly (desiccated/dehydrated) so the vacuum does not affect them. Fixation needs to be done as quickly as possible because the sample properties will start changing as soon as it is removed from its natural environment. For example, in a tissue sample, the oxygen levels begin decreasing, causing an altered...

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Plasma prothrombin antigenic levels across thrombotic and hemorrhagic phenotypes in triple-positive antiphospholipid patients with antiprothrombin antibodies.

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Related Experiment Video

Updated: May 18, 2026

Helical Organization of Blood Coagulation Factor VIII on Lipid Nanotubes
12:24

Helical Organization of Blood Coagulation Factor VIII on Lipid Nanotubes

Published on: June 3, 2014

Cryogenic electron microscopy and coagulation factors.

Bassem M Mohammed1, Nicola Pozzi, Enrico Di Cera

  • 1Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, Missouri, USA.

Current Opinion in Hematology
|May 16, 2026
PubMed
Summary
This summary is machine-generated.

Cryo-electron microscopy (cryo-EM) provides crucial structural insights into coagulation factors, advancing our understanding of blood clotting mechanisms and enabling the development of novel therapeutics.

Keywords:
coagulation factorscryogenic electron microscopystructure biology

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Area of Science:

  • Structural Biology
  • Biochemistry
  • Hematology

Background:

  • Cryo-electron microscopy (cryo-EM) offers unique capabilities for studying protein structures under near-native conditions.
  • Coagulation research has benefited significantly from recent cryo-EM advancements, providing new perspectives on protein interactions.
  • Understanding the structural context of the coagulation cascade is essential for deciphering its complex mechanisms.

Purpose of the Study:

  • To review recent advances in the application of cryo-electron microscopy (cryo-EM) to study coagulation factors.
  • To highlight how cryo-EM is reshaping our understanding of protein-protein interactions within the coagulation cascade.
  • To explore the impact of cryo-EM on the development of novel therapeutics and diagnostics for coagulation disorders.

Main Methods:

  • Cryogenic electron microscopy (cryo-EM) was employed to resolve high-resolution structures of coagulation factors.
  • Analysis of cryo-EM data provided insights into the architecture and functional roles of different protein domains.
  • Structural data was correlated with pathogenic mechanisms and therapeutic strategies.

Main Results:

  • Cryo-EM structures revealed the architecture of Factor V/Va, emphasizing the role of protease domains in protein-protein interactions.
  • Mapping of autoantibody epitopes for prothrombin and Factor VIII using cryo-EM elucidated disease mechanisms in antiphospholipid syndrome and hemophilia.
  • Recent cryo-EM structures of Factor XIIa, prothrombin, and engineered Factor VIII demonstrate its utility in accelerating biotherapeutic design.

Conclusions:

  • Cryo-electron microscopy (cryo-EM) enables the resolution of macromolecular conformations with minimal protein quantities.
  • Structural insights from cryo-EM facilitate the rational design of next-generation therapeutics and targeted diagnostics.
  • Future integration with techniques like HDX-MS and cryo-electron tomography (cryo-ET) will provide in situ structural information within physiological environments.