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DNA switches: from principles to applications.

Fuan Wang1, Xiaoqing Liu, Itamar Willner

  • 1Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904 (Israel) http://chem.ch.huji.ac.il/willner/

Angewandte Chemie (International Ed. in English)
|December 19, 2014
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Summary

This review explores DNA switches, which are nucleic acid assemblies that change states in response to triggers. These DNA switches have applications in drug delivery and enzyme activation.

Keywords:
DNA machinesDNA switchesDNAzymeselectrochemistryphotochemistry

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Area of Science:

  • Biochemistry and Molecular Biology
  • Supramolecular Chemistry
  • Nanotechnology

Background:

  • Nucleic acid base sequences encode crucial structural and functional properties.
  • These properties include the formation of complex structures (e.g., G-quadruplexes) and functional roles (e.g., DNAzymes, aptamers).
  • Understanding these encoded properties is key to designing advanced biomolecular systems.

Purpose of the Study:

  • To review the implementation of information encoded in nucleic acids for developing DNA switches.
  • To highlight the design principles and triggering mechanisms of switchable DNA assemblies.
  • To discuss the diverse applications and future potential of DNA switch technology.

Main Methods:

  • Review of existing literature on nucleic acid structures and functions.
  • Analysis of supramolecular nucleic acid assemblies designed as molecular switches.
  • Examination of various external stimuli (pH, ions, light, electricity) used to control DNA switches.

Main Results:

  • DNA switches are defined as supramolecular assemblies exhibiting cyclic, switchable transitions between distinct states.
  • These transitions are reliably controlled by specific triggers and counter triggers.
  • Demonstrated applications include switchable DNA hydrogels, controlled drug release, and enzyme cascade activation.

Conclusions:

  • The information encoded within nucleic acid sequences can be effectively harnessed to create sophisticated DNA switches.
  • DNA switches offer versatile platforms for developing responsive biomaterials and advanced therapeutic strategies.
  • Future research holds significant promise for expanding the capabilities and applications of these switchable nucleic acid systems.