A1 Journal article – refereed
F-19 NMR Spectroscopic Analysis of the Binding Modes in Triple-Helical Peptide Nucleic Acid (PNA)/MicroRNA Complexes

List of Authors: Tahtinen Ville, Granqvist Lotta, Murtola Merita, Stromberg Roger, Virta Pasi
Publication year: 2017
Journal: Chemistry - A European Journal
Journal name in source: CHEMISTRY-A EUROPEAN JOURNAL
Journal acronym: CHEM-EUR J
Volume number: 23
Issue number: 29
Number of pages: 12
ISSN: 0947-6539
eISSN: 1521-3765

Triplex-forming peptide nucleic acids (TFPNAs) were targeted to double-helical regions of F-19-labeled RNA hairpin models (a UA-rich duplex with a hexaethylene glycol (heg) loop and a microRNA model, miR-215). In addition to conventional UV-and circular dichroism (CD)-based detection, binding was monitored by F-19 NMR spectroscopy. Detailed information on the stoichiometry and transition between the triple-helical peptide nucleic acid (PNA)/RNA and PNA)(2)/RNA binding modes could be obtained. gamma-(R)-Hydroxymethyl- modified thymine-1-yl- and 2-aminopyridin-3-yl-acetyl derivatives of TFPNAs were additionally synthesized, which were targeted to the same RNA models, and the effect of the gamma-(R)-hydroxymethyl group on binding was studied. An appropriate pattern of gamma-(R)-hydroxymethyl modifications reduced the stability of the ternary complex and preferred stoichiometric binding to the miR-215 model.

Last updated on 2019-20-07 at 13:17