A highly sensitive G-quadruplex-based luminescent switch-on probe for the detection of polymerase 3'-5' proofreading activity

Ka Ho Leung, Hong Zhang He, Hai Jing Zhong, Lihua Lu, Daniel Shiu Hin Chan, Dik Lung Ma*, Chung Hang Leung

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

13 Citations (Scopus)

Abstract

We report herein a luminescent switch-on label-free G-quadruplex-based assay for the rapid and sensitive detection of polymerase proofreading activity using a novel iridium(III) complex as a G-quadruplex-selective probe. The interaction of the iridium(III) complex with the G-quadruplex motif facilitates the highly sensitive switch-on detection of polymerase proofreading activity. Using T4 DNA polymerase (T4 pol) as a model enzyme, the assay achieved high sensitivity and selectivity for T4 pol over other tested enzymes.

Original languageEnglish
Pages (from-to)224-228
Number of pages5
JournalMethods
Volume64
Issue number3
DOIs
Publication statusPublished - 15 Dec 2013

Scopus Subject Areas

  • Molecular Biology
  • Biochemistry, Genetics and Molecular Biology(all)

User-Defined Keywords

  • G-quadruplex
  • Iridium(III) complex
  • Luminescent
  • Polymerase
  • Proofreading

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