Synthesis of ferrocenylcarbodiimide as a convenient electrochemically active labeling reagent for nucleic acids |
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Authors: | Kosuke Mukumoto Shigeori Takenaka |
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Affiliation: | a Department of Materials Science, Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu-shi 804 8550, Japan b Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka 812 8581, Japan |
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Abstract: | Ferrocenylcarbodiimides carrying different redox potentials, 1 and 2, were designed and synthesized as convenient electrochemically active labeling reagents for nucleic acids, which may be used as dually labeling reagents of nucleic acids like Cy3 and Cy5 dyes. These reagents could react with the imino unit of thymine or guanine base on DNA or of uracil base on RNA under a basic buffer condition to yield a labeled product quantitatively in a short period of time. The current responses of the labeled DNAs in square wave voltammetric (SWV) measurement showed a good linear correlation with the amount of the hybridized ones. DNAs labeled with the two different reagents, 1 and 2, could be detected electrochemically at different potentials after hybridization with a DNA probe-immobilized gold electrode. |
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Keywords: | Ferrocenylcarbodiimide Electrochemical detection DNA RNA Dual labeling Competitive hybridization |
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