2'-O,4'-C-Methylene-Bridged Nucleic Acids Stabilize Metal-Mediated Base Pairing in a DNA Duplex

Chembiochem : a European Journal of Chemical Biology
Osamu NakagawaSatoshi Obika

Abstract

The 2'-O,4'-C-methylene-bridged or locked nucleic acid (2',4'-BNA/LNA), with an N-type sugar conformation, effectively improves duplex-forming ability. 2',4'-BNA/LNA is widely used to improve gene knockdown in nucleic acid based therapies and is used in gene diagnosis. Metal-mediated base pairs (MMBPs), such as thymine (T)-HgII -T and cytosine (C)-AgI -C have been developed and used as attractive tools in DNA nanotechnology studies. This study aimed to investigate the application of 2',4'-BNA/LNA in the field of MMBPs. 2',4'-BNA/LNA with 5-methylcytosine stabilized the MMBP of C with AgI ions. Moreover, the 2',4'-BNA/LNA sugar significantly improved the duplex-forming ability of the DNA/DNA complex, relative to that by the unmodified sugar. These results suggest that the sugar conformation is important for improving the stability of duplex-containing MMBPs. The results indicate that 2',4'-BNA/LNA can be applied not only to nucleic acid based therapies, but also to MMBP technologies.

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Citations

Jul 3, 2019·Journal of Biological Inorganic Chemistry : JBIC : a Publication of the Society of Biological Inorganic Chemistry·Isabell SchönrathJens Müller
Jul 2, 2019·Angewandte Chemie·Shuvankar NaskarJens Müller
Jun 20, 2019·Chembiochem : a European Journal of Chemical Biology·Fabienne Levi-AcobasMarcel Hollenstein
Sep 10, 2020·Chemical Communications : Chem Comm·Tatsuya FunaiHidehito Urata

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