Nucleic acid mediated electron transfer
First Claim
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1. A method of detecting the presence of a sequence in a nucleic acid sample, said method comprising:
- a) applying an input signal to an electrode comprising a hybridization complex, wherein said hybridization complex comprises;
1) a single stranded nucleic acid;
2) a target sequence hybridized to said single stranded nucleic acid; and
3) at least one covalently attached electron donor moiety;
such that an electron is transferred from said electron donor moiety to said electrode such that the redox state of said electron donor moiety is changed to form an electron acceptor moiety;
b) transferring an electron from a reductant to said electron acceptor moiety; and
c) detecting electron transfer between said electron donor moiety and said electrode, wherein the presence of electron transfer is an indication of the presence of said target sequence.
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Abstract
The present invention provides for the selective covalent modification of nucleic acids with redox active moieties such as transition metal complexes. Electron donor and electron acceptor moieties are covalently bound to the ribose-phosphate backbone of a nucleic acid at predetermined positions. The resulting complexes represent a series of new derivatives that are bimolecular templates capable of transferring electrons over very large distances at extremely fast rates. These complexes possess unique structural features which enable the use of an entirely new class of bioconductors and photoactive probes.
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Citations
13 Claims
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1. A method of detecting the presence of a sequence in a nucleic acid sample, said method comprising:
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a) applying an input signal to an electrode comprising a hybridization complex, wherein said hybridization complex comprises;
1) a single stranded nucleic acid;
2) a target sequence hybridized to said single stranded nucleic acid; and
3) at least one covalently attached electron donor moiety;
such that an electron is transferred from said electron donor moiety to said electrode such that the redox state of said electron donor moiety is changed to form an electron acceptor moiety;
b) transferring an electron from a reductant to said electron acceptor moiety; and
c) detecting electron transfer between said electron donor moiety and said electrode, wherein the presence of electron transfer is an indication of the presence of said target sequence. - View Dependent Claims (2, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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3. A method of detecting the presence of a sequence in a nucleic acid sample, said method comprising:
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a) applying an input signal to an electrode comprising a hybridization complex, wherein said hybridization complex comprises;
1) a single stranded nucleic acid;
2) a target sequence hybridized to said single stranded nucleic acid; and
3) at least one covalently attached electron acceptor moiety;
such that an electron is transferred from said electron acceptor moiety to said electrode such that the redox state of said electron acceptor moiety is changed to form an electron donor moiety;
b) transferring an electron from an oxidant to said electron donor moiety; and
c) detecting electron transfer between said electron acceptor moiety and said electrode, wherein the presence of electron transfer is an indication of the presence of said target sequence. - View Dependent Claims (4)
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Specification