Modular programming of interaction and geometric specificity enables assembly of complex DNA origami nanostructures

Area of Science:

• Nanotechnology
• Materials Science
• Synthetic Biology

Background:

• Self-assembly of nanoscale building blocks enables the creation of complex, biomimetic materials.
• DNA origami offers precise control over nanoscale structure design, including shape, binding, and interactions.

Purpose of the Study:

• To develop a modular DNA origami design approach for assembling geometrically complex nanoscale structures, including those with nonuniform curvatures.
• To reduce the cost and effort associated with DNA origami design by conserving core structures and DNA staples across different designs.
• To enable precise, independent programming of subunit interactions and binding angles.

Main Methods:

• A modular DNA origami design strategy featuring a conserved core structure and reusable DNA staples.
• Adjustable overhang lengths and sequences for programming subunit interactions and binding angles.
• Validation using cryogenic electron microscopy, gel electrophoresis, and coarse-grained simulations.

Main Results:

• Demonstrated assembly of diverse, self-limiting nanostructures, including anisotropic shells, an icosahedral shell (T=13), and a toroid with variable curvature.
• Validated a set of robust design rules for modular DNA origami.
• Achieved significant cost and effort reduction by preserving over 70% of DNA staples between designs.

Conclusions:

• The modular DNA origami approach provides an efficient and cost-effective framework for fabricating complex nanostructures.
• This strategy facilitates the creation of novel nanoscale architectures with programmable properties.
• The findings pave the way for advanced applications in materials science and synthetic biology.