A structurally variable hinged tetrahedron framework from DNA origami.

Area of Science:

• Nanotechnology
• Biomolecular Engineering
• Materials Science

Background:

• Polyhedral wire-frame objects at the nanometer scale are promising for structural scaffolds and synthetic nanocontainers.
• DNA's base-pairing properties enable bottom-up self-assembly for molecularly programmed nanostructures.

Purpose of the Study:

• To construct a hollow, rigid DNA tetrahedron framework using the DNA origami method.
• To investigate the structural variability and functionalization capabilities of the DNA tetrahedron.

Main Methods:

• DNA origami technique for constructing the nanostructure.
• Gel electrophoresis and direct imaging for structural confirmation.
• DNA PAINT superresolution fluorescence microscopy for site-specific functionalization.

Main Results:

• A 75 nm strut length hollow and rigid DNA tetrahedron framework was successfully synthesized.
• Flexible hinges at the joints allowed for structural variability, with four variants created by introducing gaps.
• Site-specific attachment of dye and linker molecules was demonstrated using DNA PAINT.

Conclusions:

• The DNA origami method enables the precise construction of complex nanostructures like the tetrahedron framework.
• The designed DNA tetrahedron exhibits structural variability and allows for targeted molecular functionalization.
• These DNA nanostructures hold potential for applications in nanocontainers, scaffolds, and molecular assembly.