Vesicle Tubulation with Self-Assembling DNA Nanosprings

Area of Science:

• Nanotechnology
• Bioengineering
• Biophysics

Background:

• Developing artificial nanomachines to control membrane curvature is a key goal in nanotechnology and bioengineering.
• Natural membrane-deforming proteins serve as inspiration for creating such artificial systems.

Purpose of the Study:

• To design and demonstrate DNA-origami curls that polymerize into nanosprings for inducing specific membrane curvatures.
• To investigate the efficacy of these DNA nanosprings in deforming biological vesicles.

Main Methods:

• Design of DNA-origami structures capable of self-assembly into nanosprings.
• Application of DNA nanosprings to lipid vesicles to induce membrane deformation.
• Observation of membrane tubule formation mediated by DNA self-assembly.

Main Results:

• DNA-origami curls successfully polymerized into nanosprings, demonstrating their ability to deform vesicles.
• Emergence of DNA-coated membrane tubules from spherical vesicles upon DNA-origami polymerization or high surface coverage.
• Successful membrane tubulation without the use of detergents or complex top-down manipulation, highlighting a self-assembly approach.

Conclusions:

• DNA self-assembly offers a novel, detergent-free method for creating membrane tubules and controlling membrane curvature.
• The design of DNA-origami structures and the conditions of deformation significantly impact tubulation efficiency and morphology.
• This work highlights the complex interactions between lipid bilayers and DNA structures for nanoscale engineering applications.