Dissipatively Fueled Unidirectionally Communicating DNA Circuits That Control Biocatalysis

Area of Science:

• Biochemistry and Molecular Biology
• Synthetic Biology
• Chemical Engineering

Background:

• Living systems exhibit dynamic, self-reorganizing properties driven by energy consumption and spatiotemporal biocatalysis.
• Synthetic systems often lack the dynamic and adaptive control seen in biological processes.
• Controlling enzyme activity in synthetic systems remains a challenge.

Purpose of the Study:

• To design unidirectionally communicating, out-of-equilibrium DNA circuits for network-guided control of enzyme biocatalytic activity.
• To mimic life's ability to dynamically regulate processes through energy consumption and controlled biocatalysis.
• To establish a framework for temporal regulation of enzymes using fuel-driven dissipation.

Main Methods:

• Development of DNA circuits utilizing programmed, dissipative manipulation for information transfer.
• Transient activation of a DNAzyme to generate fuel for temporal activation of trypsin.
• Employing fuel-driven dissipation to regulate nucleic acid and protein-based enzymes in cyclic processes.
• Utilizing rapid DNA strand hybridization to attain transient states and exonuclease digestion to regenerate equilibrium.
• Experimental and computational methodologies for system analysis and control.

Main Results:

• Demonstrated unidirectionally communicating DNA circuits that enable network-guided control of enzyme activity.
• Achieved temporal regulation of enzyme activity through fuel-driven dissipation and cyclic processes.
• Precisely controlled the lifetime of transient states by manipulating fuel and exonuclease concentrations and DNA strand kinetics.

Conclusions:

• Successfully created out-of-equilibrium DNA circuits capable of spatiotemporally controlling biocatalytic processes.
• Established a novel information-transfer framework for regulating enzyme activity, inspired by life's dynamic nature.
• The developed system offers precise control over enzyme function, paving the way for advanced synthetic biological applications.