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- Kentaro Tanaka
- Department of Chemistry, Graduate School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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- Atsushi Tengeiji
- Department of Chemistry, Graduate School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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- Tatsuhisa Kato
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan.
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- Namiki Toyama
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan.
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- Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
書誌事項
- 公開日
- 2003-02-21
- DOI
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- 10.1126/science.1080587
- 公開者
- American Association for the Advancement of Science (AAAS)
この論文をさがす
説明
<jats:p> DNA has a structural basis to array functionalized building blocks. Here we report the synthesis of a series of artificial oligonucleotides, d(5′-G <jats:bold>H</jats:bold> <jats:sub> <jats:italic>n</jats:italic> </jats:sub> C-3′) ( <jats:italic>n</jats:italic> = 1 to 5), with hydroxypyridone nucleobases ( <jats:bold>H</jats:bold> ) as flat bidentate ligands. Right-handed double helices of the oligonucleotides, <jats:italic>n</jats:italic> Cu <jats:sup>2+</jats:sup> ·d(5′-G <jats:bold>H</jats:bold> <jats:sub> <jats:italic>n</jats:italic> </jats:sub> C-3′) <jats:sub>2</jats:sub> ( <jats:italic>n</jats:italic> = 1 to 5), were quantitatively formed through copper ion (Cu <jats:sup>2+</jats:sup> )–mediated alternative base pairing ( <jats:bold>H</jats:bold> -Cu <jats:sup>2+</jats:sup> - <jats:bold>H</jats:bold> ), where the Cu <jats:sup>2+</jats:sup> ions incorporated into each complex were aligned along the helix axes inside the duplexes with the Cu <jats:sup>2+</jats:sup> -Cu <jats:sup>2+</jats:sup> distance of 3.7 ± 0.1 angstroms. The Cu <jats:sup>2+</jats:sup> ions were coupled ferromagnetically with one another through unpaired <jats:italic>d</jats:italic> electrons to form magnetic chains. </jats:p>
収録刊行物
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- Science
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Science 299 (5610), 1212-1213, 2003-02-21
American Association for the Advancement of Science (AAAS)
