Related Experiment Videos
Budding of alphaviruses
J H Strauss1, E G Strauss, R J Kuhn
1Divn of Biology, California Institute of Technology, Pasadena 91125, USA.
Trends in Microbiology
|September 1, 1995
Summary
High-resolution structural studies reveal how alphavirus glycoproteins interact to form spikes and bind the nucleocapsid. This interaction is key to the viral budding process, confirmed by biochemical and genetic research.
Area of Science:
- Virology
- Structural Biology
- Molecular Biology
Background:
- Alphaviruses possess complex icosahedral structures.
- The viral external shell and nucleocapsid are crucial for viral assembly and release.
- Understanding virus-host interactions at a molecular level is vital for antiviral development.
Purpose of the Study:
- To elucidate the high-resolution structures of alphaviruses.
- To define the interactions between viral glycoproteins and the nucleocapsid.
- To understand the molecular mechanisms driving viral budding.
Main Methods:
- High-resolution structural determination (e.g., cryo-EM, X-ray crystallography).
- Biochemical assays to study protein-protein interactions.
- Molecular genetic studies to investigate the budding process.
Main Results:
- Detailed atomic structures of alphavirus icosahedral particles were resolved.
- Specific interactions between trimeric glycoproteins and the nucleocapsid were identified.
- A sequence-specific interaction between glycoprotein cytoplasmic domains and the nucleocapsid was shown to drive budding.
Conclusions:
- The structural and biochemical data provide a comprehensive model for alphavirus assembly.
- The findings highlight the critical role of glycoprotein-nucleocapsid interactions in viral egress.
- This research offers insights into potential targets for antiviral therapies against alphaviruses.