Complex reconfiguration of DNA nanostructures.

Area of Science:

• Biochemistry
• Molecular Biology
• Nanotechnology

Background:

• Nucleic acids are utilized for synthetic structural and dynamic systems.
• Toehold-mediated strand displacement facilitates complex molecular machines.
• Achieving arbitrary structural reconfiguration in DNA remains a challenge.

Purpose of the Study:

• To develop a general method for complex structural reconfiguration of DNA.
• To enable DNA structures to change into arbitrarily prescribed shapes.

Main Methods:

• Utilized a modularly interconnected architecture of single-stranded DNA tiles and bricks.
• Employed a novel strand removal strategy that exposes new toeholds on neighboring strands.
• Demonstrated reconfiguration without predesigned external toeholds.

Main Results:

• Successfully reconfigured a two-dimensional rectangular DNA canvas into diverse prescribed shapes.
• Achieved reconfiguration of a three-dimensional DNA cuboid.
• Showcased a generalizable method for DNA structural transformation.

Conclusions:

• The developed method provides a versatile approach for DNA structural reconfiguration.
• This technique overcomes limitations in achieving arbitrary shape changes in DNA nanostructures.
• Opens new avenues for designing dynamic DNA-based systems and molecular computers.