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We developed a programmable DNA origami engine powered by RNA fuel. This nanoscale machine converts chemical energy into mechanical motion, enabling tunable particle movement at the microscale.

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Area of Science:

  • Nanotechnology
  • Molecular Engineering
  • Biophysics

Background:

  • Autonomous molecular machines are crucial for synthetic nanoscale systems.
  • Biological motors convert chemical energy into mechanical motion.
  • DNA origami offers a platform for constructing nanoscale devices.

Purpose of the Study:

  • To construct a tunable, RNA-fueled DNA origami engine.
  • To drive cyclic particle movement at the microscale.
  • To explore programmable, self-resetting molecular actuation.

Main Methods:

  • Utilized sequential RNA-DNA hybridization and RNase H enzymatic cleavage.
  • Engineered a DNA origami structure for cyclic conformational switching.
  • Modulated RNA/enzyme concentrations and temperature to control kinetics.

Main Results:

  • Achieved tunable switching kinetics with transition periods as short as ~10 seconds.
  • Demonstrated cyclic movement of a 500 nm-diameter particle.
  • Identified key factors governing folding and unfolding pathways.

Conclusions:

  • The RNA-fueled DNA origami engine is a programmable, self-resetting molecular actuator.
  • Engine addressability is achieved by altering RNA sequences.
  • Provides a blueprint for complex nanomechanical systems with biomotor-like capabilities.