An Infectious Virus-like Particle Built on a Programmable Icosahedral DNA Framework

Area of Science:

• Biotechnology
• Nanotechnology
• Molecular Biology

Background:

• Viruses utilize nano-scale chambers for genome packaging and infection.
• Mimicking viral morphology and packaging is crucial for developing novel delivery systems.

Purpose of the Study:

• To engineer a programmable, rigid icosahedral DNA nanoframe.
• To encapsulate and deliver bacteriophage genomes using this DNA architecture.
• To demonstrate the functionality of the DNA nanoframe as a virus mimetic particle.

Main Methods:

• Design and synthesis of a rigid icosahedral DNA nanoframe.
• Encapsulation of the phiX174 bacteriophage genome.
• Modulation of packaging efficiency via anchoring strands.
• Infection assays using Escherichia coli (E. coli) cells.

Main Results:

• The DNA nanoframe successfully mimicked viral morphology and packaging.
• Packaging efficiency was tunable by adjusting anchoring strands.
• Encapsulated phage genomes remained accessible for enzymatic manipulation.
• The packed complex demonstrated infectivity in E. coli, producing plaques.

Conclusions:

• The developed rigid icosahedral DNA nanoframe serves as a versatile platform.
• This platform enables functional nucleic acid entrapment, manipulation, and delivery.
• The DNA nanoframe represents a novel approach to creating virus mimetic particles.