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Updated: May 29, 2026
09:08
Generation and Assembly of Virus-Specific Nucleocapsids of the Respiratory Syncytial Virus
Published on: July 27, 2021
An engineered closed-shell, two-component, 480-subunit nucleocapsid
Mikail D Levasseur1, Naohiro Terasaka1, Angela Steinauer1
1Laboratory of Organic Chemistry, ETH Zurich, Zurich 8093, Switzerland.
Summary
Researchers engineered a novel 480-subunit protein cage by splitting the NC-4 nucleocapsid. This split NC-4 (spNC-4) enables versatile surface functionalization for advanced biotechnology and medical applications.
Area of Science:
- Biotechnology
- Nanotechnology
- Structural Biology
Background:
- Self-assembling protein cages serve as crucial nanoscale containers.
- Two-component systems offer enhanced functional complexity for protein cages.
- The nucleocapsid NC-4 is a 240-subunit cage evolved for mRNA packaging.
Purpose of the Study:
- To split the NC-4 nucleocapsid into a two-component system.
- To create a larger, 480-subunit capsid with functionalizable exterior termini.
- To demonstrate the utility of spNC-4 for site-specific modifications.
Main Methods:
- Genetically splitting the 240-subunit NC-4 into two fragments.
- Assembling the split fragments into a 480-subunit spNC-4 capsid.
- Appending peptide and protein tags to the spNC-4 exterior surface.
- Utilizing posttranslational modifications for glycosylation and antibody recruitment.
Main Results:
- Successful assembly of a stable 480-subunit split NC-4 (spNC-4) capsid.
- Demonstrated functionalization of the spNC-4 exterior with peptide and protein tags.
- Enabled site-specific glycosylation and antibody-mediated cell targeting.
- Preserved cage structure and assembly after splitting.
Conclusions:
- Splitting the NC-4 nucleocapsid expands its utility as a nanoscale container.
- The spNC-4 platform facilitates customizable surface modification for diverse applications.
- This approach provides a robust platform for simultaneous encapsulation and surface functionalization in biotechnology.
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