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Detection of Bacteria Using Fluorogenic DNAzymes
13:20

Detection of Bacteria Using Fluorogenic DNAzymes

Published on: May 28, 2012

Developing fluorogenic RNA-cleaving DNAzymes for biosensing applications.

M Monsur Ali1, Sergio D Aguirre, Wendy W K Mok

  • 1Department of Biochemistry, McMaster University, Hamilton, ON, Canada.

Methods in Molecular Biology (Clifton, N.J.)
|February 9, 2012
PubMed
Summary
This summary is machine-generated.

Deoxyribozymes (DNAzymes) are DNA catalysts synthesized via in vitro selection. Researchers detail methods for isolating signaling DNAzymes and engineering aptazymes for sensitive biosensing applications.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Synthetic Biology

Background:

  • Deoxyribozymes (DNAzymes) are DNA molecules with catalytic activity, not found naturally.
  • They are isolated using in vitro selection (IVS) from DNA libraries.
  • RNA-cleaving DNAzymes (RNase DNAzymes) are a well-studied class.

Purpose of the Study:

  • To describe methods for isolating signaling DNAzymes using IVS.
  • To present approaches for engineering fluorogenic aptazymes for target detection.
  • To highlight the utility of aptazymes in biosensing.

Main Methods:

  • Isolation of RNA-cleaving DNAzymes via in vitro selection (IVS).
  • Modification of DNAzymes and substrates with fluorophores for signaling.
  • Coupling signaling DNAzymes with aptamers to create aptazymes.

Main Results:

  • Successful isolation of numerous RNase DNAzymes.
  • Development of fluorescence-signaling DNAzymes.
  • Engineering of aptazymes for allosteric control of catalytic and signaling activity.

Conclusions:

  • Signaling DNAzymes are versatile tools for monitoring RNA cleavage.
  • Fluorogenic aptazymes offer a powerful platform for developing novel biosensors.
  • The described methods facilitate the creation of DNAzyme-based detection systems.