2,6-Dimercuriphenol as a Bifacial Dinuclear Organometallic Nucleobase

Dattatraya Uttam Ukale; Tuomas Lönnberg

doi:10.1002/anie.201809398

2,6-Dimercuriphenol as a Bifacial Dinuclear Organometallic Nucleobase

Angew Chem Int Ed Engl. 2018 Dec 3;57(49):16171-16175. doi: 10.1002/anie.201809398. Epub 2018 Nov 11.

Authors

Dattatraya Uttam Ukale¹, Tuomas Lönnberg¹

Affiliation

¹ Department of Chemistry, University of Turku, Vatselankatu 2, 20014, Turku, Finland.

PMID: 30358071
DOI: 10.1002/anie.201809398

Abstract

A C-nucleoside having 2,6-dimercuriphenol as the base moiety has been synthesized and incorporated into an oligonucleotide. NMR and UV melting experiments revealed the ability of this bifacial organometallic nucleobase surrogate to form stable dinuclear Hg^II -mediated base triples with adenine, cytosine, and thymine (or uracil) in solution as well as within a triple-helical oligonucleotide. A single Hg^II -mediated base triple between 2,6-dimercuriphenol and two thymines increased both Hoogsteen and Watson-Crick melting temperatures of a 15-mer pyrimidine⋅purine*pyrimidine triple helix by more than 10 °C relative to an unmodified triple helix of the same length. This novel binding mode could be exploited in targeting certain pathogenic nucleic acids as well as in DNA nanotechnology.

Keywords: base triple; hybridization; mercury; nucleobases; oligonucleotides.

Publication types

Research Support, Non-U.S. Gov't