DNA origami with double-stranded DNA as a unified scaffold

Area of Science:

• Nanotechnology
• Biotechnology
• Molecular Biology

Background:

• DNA origami is a nanotechnology for self-assembling nanoscale objects using DNA strands.
• Traditional DNA origami relies on long single-stranded DNA (ssDNA) scaffolds, which are difficult to source.
• Limited availability of ssDNA restricts the size and complexity of DNA origami structures.

Purpose of the Study:

• To develop a method for fabricating DNA origami structures using double-stranded DNA (dsDNA) scaffolds.
• To overcome the limitations associated with the scarcity of long ssDNA scaffolds.
• To enable the assembly of larger and more complex integrated DNA nanostructures.

Main Methods:

• Utilized dsDNA scaffolds directly for DNA origami fabrication.
• Designed scaffold folding paths with two key principles: folding path asymmetry and periodic convergence of constituent ssDNA strands.
• Asymmetry minimizes staple complementarity; periodic convergence promotes unified structure assembly.

Main Results:

• Successfully demonstrated the direct use of dsDNA scaffolds for integrated DNA origami.
• Developed folding path strategies (asymmetry and periodic convergence) to prevent dsDNA scaffold recovery.
• Achieved reliable assembly of unified DNA nanostructures from dsDNA scaffolds.

Conclusions:

• Double-stranded DNA (dsDNA) scaffolds can be effectively used for DNA origami.
• The proposed folding path design principles ensure stable and integrated nanostructure formation.
• This method expands the possibilities for creating complex DNA nanostructures by overcoming ssDNA limitations.