| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
Switch molecules based on nucleic acid aptamers which can vary their binding activities depending on external stimuli and surroundings are expected to be applicable to drug delivery systems and biosensors. In this study, we attempted to create xenonucleic acid switch molecules, which are triggered by chemical conversions of bridged nucleotides owing to external stimuli and surroundings. Consequently, we found that replacements of bridged nucleotides bearing cytosine base with natural 2'-deoxycytidine at 9th and 15th positions could inactivate the avidity of the aptamer, whereas those with 2'-deoxy-5-methylcytidine retained the binding activity, indicating that the obtained switch molecule will potentially be applicable to detection systems for cytosine methylations.
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