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Updated: Sep 11, 2025
09:08
Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus
Published on: July 27, 2021
3.9K
RNA-induced Allosteric Coupling Drives Viral Capsid Assembly.
Sean Hamilton1, Tushar Modi1, Petr Šulc1,2,3
1Center for Biological Physics, Arizona State University, Tempe, Arizona 85281, USA.
PRX Life
|August 18, 2025
Summary
RNA binding induces allosteric changes in bacteriophage MS2 capsid assembly. This dynamic coupling guides viral capsid formation and offers insights for antiviral and drug delivery systems.
Area of Science:
- Biophysics
- Structural Biology
- Virology
Background:
- Single-stranded RNA virus capsid assembly is crucial for viral replication.
- Understanding these mechanisms can inform antiviral therapies and drug delivery systems.
Purpose of the Study:
- To investigate RNA-induced allostery in Levivirus bacteriophage MS2 assembly.
- To elucidate the role of dynamic flexibility and coupling in capsid formation.
Main Methods:
- Computational analysis using the Dynamic Flexibility Index.
- Computational analysis using the Dynamic Coupling Index.
Main Results:
- Asymmetric RNA binding to MS2 coat protein dimers induces conformational changes and reorganizes long-distance communication pathways.
- A W82R mutation in the FG-loop disrupts communication asymmetry, leading to assembly defects.
- Dynamic coupling is present in dimers, intermediates, and the final capsid, facilitating signal transduction.
Conclusions:
- RNA binding triggers allosteric conformational changes essential for MS2 capsid assembly.
- Dynamic coupling and signal transduction are key mechanisms driving capsid formation.
- Findings provide a basis for developing novel antiviral strategies and RNA-based delivery vehicles.
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