Fuel-Driven Transient DNA Strand Displacement Circuitry with Self-Resetting Function

Area of Science:

• Biochemistry
• Molecular Biology
• Synthetic Biology

Background:

• Toehold-mediated DNA strand displacement (DSD) is crucial for DNA computing and device engineering.
• Existing DSD systems lack autonomous self-resetting capabilities and programmable lifetimes.

Purpose of the Study:

• To engineer self-resettable DSD cascades with programmable lifetimes using an ATP-powered system.
• To create transient DSD reactions driven by an ATP-fueled ligation/restriction network.

Main Methods:

• Concatenating an ATP-powered ligation/restriction network with toehold-mediated DSD reactions.
• Utilizing ATP-fueled ligation to increase toehold length and local concentration for strand displacement.
• Employing concurrent endonuclease restriction to eliminate ligation bias and reset the system.

Main Results:

• Achieved ATP-driven transient DSD with self-resetting behavior.
• Engineered programmable lifetimes and adaptive dynamic steady states for DSD cascades.
• Demonstrated ATP-fueled transient DSD cascades and a higher level of fuel-driven automaton.

Conclusions:

• The developed system enables autonomous self-resetting and programmable lifetimes for DSD cascades.
• This approach advances DNA-based devices and molecular computing by introducing transient, fuel-driven dynamics.
• The combination of ligation/restriction networks with DSD offers a powerful platform for complex molecular automata.