Assembly of multienzyme complexes on DNA nanostructures

Area of Science:

• Biochemistry and Molecular Biology
• Nanotechnology and Materials Science
• Synthetic Biology and Enzyme Engineering

Background:

• Enzyme catalytic efficiency in nature relies on precise spatial organization of multienzyme complexes.
• Controlled positioning and orientation of enzymes are crucial for efficient substrate transport and cascade reactions.
• Self-assembled DNA nanostructures offer a powerful platform for nanoscale biomolecular organization.

Purpose of the Study:

• To present detailed protocols for using DNA nanostructures to organize multienzyme cascades.
• To enable precise control over enzyme relative distance, compartmentalization, and substrate diffusion pathways.
• To provide methods for assembly, characterization, and functional testing of DNA-nanostructure-based enzyme complexes.

Main Methods:

• Preparation and purification of DNA-conjugated enzymes and cofactors.
• Assembly of enzyme-cofactor complexes onto DNA nanostructure scaffolds.
• Characterization using gel electrophoresis and single-molecule imaging.
• Purification of nano-assemblies and functional assays (bulk and single-molecule fluorescence).

Main Results:

• Demonstrated successful spatial organization of multienzyme cascades using DNA nanostructures.
• Achieved controlled relative positioning, compartmentalization, and substrate diffusion paths.
• Established protocols for comprehensive characterization and functional validation of the assembled complexes.

Conclusions:

• DNA nanostructures serve as versatile scaffolds for engineering efficient multienzyme complexes.
• The presented protocols facilitate rapid (1-2 weeks) assembly and characterization of nanoscale enzyme systems.
• This approach enables the design of artificial enzyme cascades with tunable properties for various applications.