The effects of metal ions on the stabilities of duplexes containing a -homochiral and heterochiral mismatched base pairs were studied. In some duplexes containing an internal mismatched base pair, significant stabilization by Hg and Ag ions was observed. While, in duplexes containing a terminal mismatched base pair, only the duplexes containing T-T and T-T mispairs were significantly stabilized by Hg ions, and the stabilities of the duplexes containing T-T and T-T mispairs exceeded those of the corresponding homochiral matched duplex. The results suggest that the formation of homo- and heterochiral T-Hg-T base pairs at duplex termini would be useful for the thermal and enzymatic stabilization of DNA-based nanodevice.
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| http://dx.doi.org/10.1080/15257770.2019.1658116 | DOI Listing |
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