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Ribonuclease-Responsive DNA Nanoswitches.

Arun Richard Chandrasekaran1,2, Ruju Trivedi1, Ken Halvorsen1,3,4

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This study introduces a DNA nanoswitch reconfigured by ribonucleases (RNases). These nanodevices offer potential for biosensing, detecting RNases, and molecular computing applications.

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Area of Science:

  • Nanotechnology
  • Molecular Biology
  • Biochemistry

Background:

  • DNA nanodevices can dynamically reconfigure with external stimuli.
  • Applications span biomedical and materials science.
  • Ribonucleases (RNases) are enzymes that degrade RNA.

Purpose of the Study:

  • To report a DNA nanoswitch reconfigurable by RNases.
  • To explore applications in biosensing and molecular computing.
  • To demonstrate RNase detection and enzyme inhibition.

Main Methods:

  • Development of a DNA nanoswitch system.
  • Utilizing RNase activity for nanoswitch reconfiguration.
  • Testing biosensing capabilities in biological fluids.
  • Implementing molecular computing functions (erase, write protection).

Main Results:

  • The DNA nanoswitch successfully reconfigures in response to RNases.
  • Demonstrated detection of RNase H and other RNases.
  • Showed inhibition of RNase activity by kanamycin.
  • Enabled erase, write protection, and erase-rewrite functions for information encoding.

Conclusions:

  • Ribonuclease-activated DNA nanoswitches offer a simple mix-and-read format.
  • Potential applications include detecting RNase contamination in biological samples.
  • Facilitates screening and characterization of RNase inhibitors.