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Micelle formation and crystallization as paradigms for virus assembly.
1University of Califonia Irvine, Department of Molecular Biology and Biochemistry, Irvine, CA 92697-3900, USA. amcphers@uci.edu
Summary
Virus assembly, like crystal and micelle formation, involves phase transitions and ordered intermediates. Protein subunits may assemble into viral capsids via reverse micelles, driven by nucleic acid condensation.
Area of Science:
- Biophysics
- Structural Biology
- Biochemistry
Background:
- Self-assembly creates geometric order from disordered components, seen in crystallization, micelle formation, and virus assembly.
- These processes represent first-order phase transitions involving partially ordered intermediates.
Purpose of the Study:
- To propose a physical pathway for viral assembly.
- To explore the role of reverse micelles and nucleic acid condensation in viral capsid formation.
Main Methods:
- The study proposes a theoretical model based on physical principles.
- It draws analogies to established self-assembly processes like crystallization and micelle formation.
Main Results:
- Viral self-assembly may proceed through reverse micelle intermediates.
- Nucleic acid condensation with specific protein polypeptides drives assembly.
- Subunit restructuring on a fluid micellar surface leads to symmetrical icosahedral capsids.
Conclusions:
- The proposed viral assembly pathway is attractive due to its reliance on inherent physical properties.
- This pathway shares characteristics with micelle and crystal self-assembly.
- Understanding these physical principles can advance knowledge of viral structure and formation.