Programmable motion of DNA origami mechanisms

Area of Science:

• Nanotechnology
• Molecular Engineering
• Biophysics

Background:

• DNA origami allows for the creation of nanoscale structures with high precision.
• Engineering dynamic and movable nanoscale components remains a significant challenge.

Purpose of the Study:

• To develop and demonstrate complex, reversible motion in DNA origami machine elements.
• To integrate simple DNA joints into sophisticated 2D and 3D mechanisms.
• To actuate these DNA mechanisms using input strands for programmable conformational changes.

Main Methods:

• Designing and fabricating flexible DNA origami rotational and linear joints with tunable stiffness and motion range.
• Integrating single-degree-of-freedom joints into higher-order mechanisms like crank-sliders and Bennett linkages.
• Utilizing DNA input strands for distributed actuation to control reversible structural transformations.

Main Results:

• Demonstrated mechanical behavior of DNA origami joints with constrained motion along a single degree of freedom.
• Successfully built and characterized 2D (crank-slider) and 3D (Bennett linkage) DNA origami mechanisms.
• Achieved reversible conformational changes of the entire DNA structure on minute timescales via distributed actuation.

Conclusions:

• Programmable motion of 2D and 3D DNA origami mechanisms can be achieved.
• A macroscopic machine design approach is effective for constructing complex DNA origami systems.
• This work advances the development of DNA-based nanomachines with controlled dynamic behavior.