期刊
NATURE COMMUNICATIONS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms7640
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [2107, 24108734, 24350040]
- Ministry of Health and Labor, Japan
- Grants-in-Aid for Scientific Research [15K13749, 15H03829, 24108734, 25410146] Funding Source: KAKEN
Chemically engineered DNAs-in which global conformation can be modulated in response to specific stimuli-could be allosteric functional DNAs themselves or work as a modulator of the functional nucleic acids such as DNAzymes and aptamers. Here, we show that two terpyridines built in the DNA backbone form a stable intramolecular 1:2 complex, [M(terpy)(2)](2+), with divalent transition metal ions. Upon complexation, the DNA conjugates adopt a Omega-shape structure, in which two distal sequences located outside the terpyridines connect with each other to form a continuous segment with a specific structure or sequence. Such a DNA structure is globally controlled by local metal complexation events that can be rationally designed based on general coordination chemistry. This method is regarded as metal ion-directed dynamic sequence edition or DNA splicing. DNAzymes with peroxidase-like activity can thus be regulated by several transition metal ions through sequence edition techniques based on the Omega-motif.
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