Duplex-Selective Ruthenium-Based DNA Intercalators

Chad M. Shade, Robert D. Kennedy, Jessica L. Rouge, Mari S. Rosen, Mary X. Wang, Soyoung E. Seo, Daniel J. Clingerman, Chad A. Mirkin*

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

We report the design and synthesis of small molecules that exhibit enhanced luminescence in the presence of duplex rather than single-stranded DNA. The local environment presented by a well-known [Ru(dipyrido[3,2-a:2′,3′-c]phenazine)L2]2+-based DNA intercalator was modified by functionalizing the bipyridine ligands with esters and carboxylic acids. By systematically varying the number and charge of the pendant groups, it was determined that decreasing the electrostatic interaction between the intercalator and the anionic DNA backbone reduced single-strand interactions and translated to better duplex specificity. In studying this class of complexes, a single RuII complex emerged that selectively luminesces in the presence of duplex DNA with little to no background from interacting with single-stranded DNA. This complex shows promise as a new dye capable of selectively staining double- versus single-stranded DNA in gel electrophoresis, which cannot be done with conventional SYBR dyes. Enhanced luminescence in the presence of duplex rather than single-stranded DNA was observed for a [Ru(dipyrido[3,2-a:2′,3′-c]phenazine)L2]2+-based DNA intercalator that was specifically modified by functionalizing the bipyridine ligands with esters and carboxylic acids.

Original languageEnglish (US)
Pages (from-to)10983-10987
Number of pages5
JournalChemistry - A European Journal
Volume21
Issue number31
DOIs
StatePublished - 2015

Keywords

  • DNA
  • bioinorganic chemistry
  • gels
  • luminescence
  • ruthenium

ASJC Scopus subject areas

  • Catalysis
  • Organic Chemistry

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  • Cite this

    Shade, C. M., Kennedy, R. D., Rouge, J. L., Rosen, M. S., Wang, M. X., Seo, S. E., Clingerman, D. J., & Mirkin, C. A. (2015). Duplex-Selective Ruthenium-Based DNA Intercalators. Chemistry - A European Journal, 21(31), 10983-10987. https://doi.org/10.1002/chem.201502095