Packaging DNA Origami into Viral Protein Cages

Area of Science:

• Biotechnology
• Nanomedicine
• Structural Biology

Background:

• DNA origami enables custom nanostructure fabrication for nanomedical and biotechnological uses.
• The in vivo behavior and delivery efficiency of DNA nanostructures remain challenging.
• Coating nanostructures with proteins or lipids is a promising strategy to improve their properties.

Purpose of the Study:

• To investigate the use of cowpea chlorotic mottle virus (CCMV) capsid proteins for coating DNA origami nanostructures.
• To develop a method for disassembling CCMV and utilizing its capsid proteins for nanostructure encapsulation.
• To explore the potential of protein-coated DNA origami for enhanced targeting and cellular delivery.

Main Methods:

• Disassembly of native CCMV particles to isolate pure capsid protein (CP) dimers.
• Binding and encapsulation of a rectangular DNA origami shape by CCMV CP dimers.
• Characterization of the resulting protein-DNA nanostructures.

Main Results:

• Successful isolation of CCMV CP dimers capable of binding DNA nanostructures.
• Demonstration of CCMV CPs encapsulating a rectangular DNA origami shape.
• Establishment of a method for creating protein-coated DNA origami nanostructures.

Conclusions:

• CCMV capsid proteins can be effectively used to coat and encapsulate DNA origami nanostructures.
• This protein cage strategy offers a promising route for improving the delivery and targeting of nanomedical and biotechnological payloads.
• The programmable nature of DNA origami combined with viral protein cages opens new avenues for advanced nano-object delivery systems.