DNA Assembly of Modular Components into a Rotary Nanodevice

Area of Science:

• Nanotechnology
• Biomimetic Engineering
• DNA Nanotechnology

Background:

• Bacterial flagellar motors are complex rotary machines enabling bacterial cell migration through bidirectional rotation.
• Existing gearset models inspire the design of artificial nanomachinery.
• Modular components are key to creating functional nanodevices.

Purpose of the Study:

• To demonstrate the DNA assembly of a structurally defined nanodevice capable of programmable rotations.
• To create artificial nanomachinery mimicking biological rotary systems using DNA fuels.
• To investigate cooperative function of modular components for bidirectional rotation.

Main Methods:

• Utilized DNA assembly to construct a rotary nanodevice with three modular components: a small origami ring, a large origami ring, and gold nanoparticles (AuNPs).
• Mimicked a planetary gearset using the origami rings and AuNPs as sun, ring, and planet gears, respectively.
• Employed real-time fluorescence spectroscopy to optically record rotary dynamics via fluorophore-AuNP interactions.

Main Results:

• Successfully self-assembled a compact rotary nanodevice with cooperative modular components.
• Demonstrated programmable, bidirectional rotations powered by DNA fuels.
• Experimental observations of rotary dynamics were consistent with theoretical calculations.

Conclusions:

• The study successfully engineered a DNA-assembled rotary nanodevice mimicking biological motors.
• The nanodevice exhibits programmable, bidirectional rotations, showcasing the potential of DNA fuels in nanomachinery.
• This work provides a blueprint for designing advanced artificial nanomachinery based on modular components.