Related Experiment Video
Updated: Jun 25, 2026
15:31
Live Cell Imaging of Alphaherpes Virus Anterograde Transport and Spread
Published on: August 16, 2013
11.0K
Genetically Recoding Respiratory Syncytial Virus to Visualize Nucleoprotein Dynamics and Virion Assembly
Margaret Dianne Mitrovich1,2, Michael D Vahey1,2
1Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, Missouri 63130, United States.
ACS Infectious Diseases
|January 1, 2025
Summary
Researchers developed a new method to genetically tag respiratory syncytial virus (RSV) nucleoproteins using noncanonical amino acids. This technique allows visualization of viral assembly, revealing new insights into RSV replication mechanisms.
Area of Science:
- Virology
- Molecular Biology
- Biochemistry
Background:
- RNA viruses have small genomes with multifunctional proteins.
- Genetically tagging viral proteins is challenging but crucial for studying viral replication.
- Respiratory syncytial virus (RSV) is a significant human pathogen.
Purpose of the Study:
- To develop a novel method for site-specific labeling of RSV nucleoprotein.
- To visualize the dynamic process of RSV assembly and identify assembly pathways.
- To establish a versatile genetic tool for studying viral nucleoproteins.
Main Methods:
- Genetic code expansion was used to engineer an RSV strain.
- Site-specific incorporation of a noncanonical amino acid into the nucleoprotein.
- Amber stop codon suppression and tetrazine-based bioorthogonal labeling with fluorophores.
Main Results:
- A recoded RSV strain was generated, enabling site-specific nucleoprotein modification.
- The labeled RSV nucleoprotein retained significant infectivity (∼70%).
- Visualized nucleoprotein complex transfer from cytoplasmic condensates to budding virions and other cellular compartments.
Conclusions:
- This study presents a powerful genetic tool for visualizing RSV assembly dynamics.
- Multiple pathways for RSV assembly were suggested by the visualization data.
- The developed framework can be extended to study other viral nucleoproteins.
