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Bovine enteric coronavirus structure as studied by a freeze-drying technique
The Journal of General Virology
|November 1, 1982
Summary
Researchers visualized bovine coronavirus (F15) using electron microscopy. The study revealed distinct virion structures and proposed a model for the coronavirus structure, detailing spike insertion points.
Area of Science:
- Veterinary Virology
- Microbiology
- Structural Biology
Background:
- Bovine coronavirus (BCV) is an important pathogen affecting cattle.
- Understanding the structural details of BCV is crucial for developing control strategies.
Purpose of the Study:
- To investigate the ultrastructure of a specific strain of bovine coronavirus (F15).
- To propose a structural model of the bovine coronavirus virion.
Main Methods:
- Electron microscopy was employed to examine purified bovine coronavirus (F15) preparations.
- A freeze-drying technique was utilized to preserve the viral structure for imaging.
Main Results:
- Three distinct morphological types of virions were observed: 'blackberry-like', smooth-surfaced, and broken particles.
- Virus projections appeared 'mushroom-shaped', with the 'stalk' embedded in the viral membrane.
- The study clearly visualized areas of spike protein insertion within the virus membrane.
Conclusions:
- The freeze-drying electron microscopy technique effectively revealed detailed structural features of bovine coronavirus.
- A structural model of the bovine coronavirus virion, emphasizing spike-membrane interactions, was proposed based on the observed morphology.