Electrostatic cycling of hybridization using nonionic DNA mimics

Sade Ruffin, Isabella A. Hung, Ursula M. Koniges, Rastislav Levicky

Research output: Contribution to journalArticle

Abstract

This study demonstrates efficient electrostatic control of surface hybridization through use of morpholinos, a charge-neutral DNA mimic, as the immobilized "probes". In addition to being compatible with low ionic strengths, use of uncharged probes renders the field interaction specific to the nucleic acid analyte. In contrast to DNA probes, morpholino probes enable facile cycling between hybridized and dehybridized states within minutes. Impact of ionic strength and temperature on the effectiveness of electrostatics to direct progress of hybridization is evaluated. Optimal electrostatic control is found when stability of probe-analyte duplexes is set so that electrostatics can efficiently switch between the forward (hybridization) and reverse (dehybridization) directions.

Original languageEnglish (US)
Pages (from-to)892-896
Number of pages5
JournalACS Sensors
Volume2
Issue number7
DOIs
StatePublished - Jul 28 2017

Fingerprint

Electrostatics
DNA
deoxyribonucleic acid
electrostatics
Morpholinos
cycles
probes
Ionic strength
DNA Probes
Nucleic Acids
Nucleic acids
nucleic acids
Switches
Temperature
interactions
temperature

Keywords

  • Assay
  • Bioaffinity
  • Electrochemical
  • Electrode
  • Monolayer
  • PNA
  • Surface

ASJC Scopus subject areas

  • Bioengineering
  • Fluid Flow and Transfer Processes
  • Process Chemistry and Technology
  • Instrumentation

Cite this

Electrostatic cycling of hybridization using nonionic DNA mimics. / Ruffin, Sade; Hung, Isabella A.; Koniges, Ursula M.; Levicky, Rastislav.

In: ACS Sensors, Vol. 2, No. 7, 28.07.2017, p. 892-896.

Research output: Contribution to journalArticle

Ruffin, Sade ; Hung, Isabella A. ; Koniges, Ursula M. ; Levicky, Rastislav. / Electrostatic cycling of hybridization using nonionic DNA mimics. In: ACS Sensors. 2017 ; Vol. 2, No. 7. pp. 892-896.
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