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DNAzyme 10-23 - Based Nanomachines for Nucleic Acid Recognition
Published on: February 9, 2024
A DNA tweezer-actuated enzyme nanoreactor.
Minghui Liu1, Jinglin Fu, Christian Hejesen
1Center for Single Molecule Biophysics, Biodesign Institute, Arizona State University, Tempe, AZ 85287, USA.
Nature Communications
|July 4, 2013
Summary
Researchers developed a DNA nanodevice that controls enzyme activity. This tweezer-like device regulates enzyme/cofactor proximity, enabling cycles of enzyme inhibition and activation for cellular pathway modulation.
Area of Science:
- Biochemistry
- Nanotechnology
- Molecular Biology
Background:
- Regulatory enzymes are crucial for cellular pathway modulation.
- Controlling enzyme activity is essential for understanding and manipulating biological processes.
Purpose of the Study:
- To engineer a DNA nanodevice capable of actuating enzyme/cofactor pair activity.
- To demonstrate externally controlled, cyclical regulation of enzyme function.
Main Methods:
- A tweezer-like DNA nanostructure was designed to spatially separate or bring together an enzyme and its cofactor.
- Enzyme activity was modulated by switching the DNA tweezers between open (inhibited) and closed (activated) states.
- Oligonucleotides were used as thermodynamic drivers to control the nanodevice's conformational changes.
Main Results:
- The DNA nanodevice successfully controlled the activity of a dehydrogenase/NAD(+) cofactor pair.
- Enzyme function was inhibited when the enzyme and cofactor were spatially separated and activated upon close proximity.
- Multiple cycles of enzyme inhibition and activation were achieved through external oligonucleotide control.
Conclusions:
- A novel DNA nanodevice principle for responsive enzyme regulation was established.
- This approach offers a platform for developing sophisticated enzyme control systems.
- Potential applications include feedback/feed-forward loops in synthetic biology and precise control of enzymatic reactions.
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