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Affinity Purification of Influenza Virus Ribonucleoprotein Complexes from the Chromatin of Infected Cells
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A structural understanding of influenza virus genome replication
Zihan Zhu1, Ervin Fodor1, Jeremy R Keown2
1Sir William Dunn School of Pathology, University of Oxford, South Parks Road, Oxford OX1 3RE, UK.
Trends in Microbiology
|November 6, 2022
Summary
Influenza virus RNA replication relies on its RNA-dependent RNA polymerase within ribonucleoprotein complexes. Recent structural data illuminate mechanisms of RNA encapsidation, de novo RNP assembly, and replication initiation control.
Area of Science:
- Virology
- Molecular Biology
- Structural Biology
Background:
- Influenza virus possesses a single-stranded negative-sense RNA genome.
- Genome replication occurs via the viral RNA-dependent RNA polymerase within ribonucleoprotein (RNP) complexes, using a positive-sense complementary RNA intermediate.
- Replication is regulated by interactions with viral and host factors.
Purpose of the Study:
- To review how recent structural data elucidate the molecular mechanisms of influenza virus genome replication.
- To focus on RNA encapsidation, de novo RNP assembly, and replication initiation regulation.
Main Methods:
- Review of recent structural data obtained through advancements in recombinant protein expression, X-ray crystallography, and cryo-electron microscopy.
- Analysis of molecular mechanisms underlying influenza virus genome replication.
Main Results:
- Structural insights reveal details of nascent RNA encapsidation.
- Understanding of de novo ribonucleoprotein (RNP) complex assembly has advanced.
- Mechanisms regulating replication initiation through host and viral factor interactions are clarified.
Conclusions:
- Recent structural data provide critical molecular insights into influenza virus genome replication.
- These findings enhance our understanding of RNA encapsidation, RNP assembly, and replication control.
- This knowledge is crucial for developing antiviral strategies.
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