Cationic guanine: positively charged nucleobase with improved DNA affinity inhibits self-duplex formation.

Chem Commun (Camb)

Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan.

Published: February 2020

Oligonucleotides represent powerful DNA-recognition tools, but the formation of undesirable "self-duplexes" becomes more probable with increasing DNA affinity. Herein, we have developed a modified nucleobase with "self-avoiding" properties. Facile methylation of guanine yields a cationic N7-methylguanine, which suppresses the formation of self-duplexes whilst improving DNA affinity through electrostatic interaction.

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Source
http://dx.doi.org/10.1039/d0cc00169dDOI Listing

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