Activity modulation and allosteric control of a scaffolded DNAzyme using a dynamic DNA nanostructure

Area of Science:

• Biochemistry
• Nanotechnology
• Molecular Biology

Background:

• Allosteric regulation is crucial in biology, but engineering it into non-allosteric catalysts remains challenging.
• DNA nanotechnology offers novel strategies for manipulating molecular interactions and functions.

Purpose of the Study:

• To develop a DNA nanotechnology-based method for introducing allosteric regulation into catalytic nucleic acids (DNAzymes).
• To demonstrate the ability to modulate DNAzyme activity through engineered allosteric control.

Main Methods:

• Grafting peroxidase-like DNAzymes (hemin-bound G-quadruplex, hemin-G) onto a DNA tetrahedral nanostructure.
• Incorporating dynamically responsive oligonucleotides to act as effectors, altering catalyst spacing and activity.

Main Results:

• Successfully introduced allosteric regulation into DNAzymes by controlling the interaction between grafted catalytic sites.
• Demonstrated modulation of DNAzyme catalytic activity in response to specific effector molecules.
• Achieved subtle, designable allosteric modulation via DNA nanostructures.

Conclusions:

• The developed DNA nanotechnology approach enables the introduction of allosteric control into DNAzymes.
• This method provides a versatile platform for engineering allosteric DNA catalysts with potential applications in nanomedicine and nanomachines.