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Modeling The Lifecycle Of Ebola Virus Under Biosafety Level 2 Conditions With Virus-like Particles Containing Tetracistronic Minigenomes
Published on: September 27, 2014
Conformational plasticity of the Ebola virus matrix protein
Jens Radzimanowski1, Gregory Effantin, Winfried Weissenhorn
1University Grenoble Alpes, UVHCI, F-38000, Grenoble, France; CNRS, UVHCI, F-38000, Grenoble, France.
Abstract:
Filoviruses are the causative agents of a severe and often fatal hemorrhagic fever with repeated outbreaks in Africa. They are negative sense single stranded enveloped viruses that can cross species barriers from its natural host bats to primates including humans. The small size of the genome poses limits to viral adaption, which may be partially overcome by conformational plasticity. Here we review the different conformational states of the Ebola virus (EBOV) matrix protein VP40 that range from monomers, to dimers, hexamers, and RNA-bound octamers. This conformational plasticity that is required for the viral life cycle poses a unique opportunity for development of VP40 specific drugs. Furthermore, we compare the structure to homologous matrix protein structures from Paramyxoviruses and Bornaviruses and we predict that they do not only share the fold but also the conformational flexibility of EBOV VP40.
Insights
Ebola virus matrix protein VP40 exhibits conformational plasticity, existing as monomers to octamers. This flexibility is crucial for viral replication and offers a target for novel antiviral drug development.
Area of Science:
- Virology
- Structural Biology
- Drug Discovery
Background:
- Filoviruses, including Ebola virus (EBOV), cause severe hemorrhagic fever with African outbreaks.
- These enveloped viruses transmit from bats to humans, posing significant public health risks.
- Limited genome size necessitates viral adaptation strategies, such as protein conformational changes.
Purpose of the Study:
- To review the conformational states of the EBOV matrix protein VP40.
- To explore VP40's structural plasticity as a potential drug target.
- To compare EBOV VP40 structure with homologous proteins from other virus families.
Main Methods:
- Review of existing literature on filovirus VP40 structure and function.
- Analysis of conformational states: monomers, dimers, hexamers, and RNA-bound octamers.
- Comparative structural analysis with matrix proteins from Paramyxoviruses and Bornaviruses.
Main Results:
- Ebola virus VP40 displays significant conformational plasticity, adopting various oligomeric states.
- This plasticity is essential for the viral life cycle, including assembly and budding.
- Structural similarities suggest conserved conformational flexibility in related viral matrix proteins.
Conclusions:
- The conformational plasticity of EBOV VP40 presents a promising avenue for developing targeted antiviral therapies.
- VP40's structural flexibility is a key adaptation mechanism for filoviruses.
- Homologous matrix proteins likely share similar structural flexibility, suggesting broader therapeutic potential.
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