Method and kit for detecting nucleic acid cleavage utilizing a covalently attached fluorescent tag
First Claim
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1. A method of detecting cleavage of a nucleic acid comprising:
- a) covalently attaching at least one fluorescence emitting label to a nucleotide of the nucleic acid to be cleaved;
b) measuring the fluorescence polarization of the label before step c);
c) incubating the labeled nucleic acid of step a) with a reagent to be tested wherein the reagent does not interact, in a manner that would diminish reagent activity enough to reduce useful sensitivity of cleavage measurement in step d), with the labeled nucleotided) measuring the fluorescence polarization of the label during step c); and
,e) comparing the fluorescence polarization measurements of step b) with step d).
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Abstract
The present invention is based on the degradation of a fluorescence labeled nucleic acid such as DNA (F-DNA), RNA (F-RNA) or DNA/RNA substrate. The label may be covalently attached to the relatively high volume substrate at one position or many positions. The nucleic acid is then put in contact with another substance and activity is detected by Fluorescence Polarization.
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16 Claims
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1. A method of detecting cleavage of a nucleic acid comprising:
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a) covalently attaching at least one fluorescence emitting label to a nucleotide of the nucleic acid to be cleaved; b) measuring the fluorescence polarization of the label before step c); c) incubating the labeled nucleic acid of step a) with a reagent to be tested wherein the reagent does not interact, in a manner that would diminish reagent activity enough to reduce useful sensitivity of cleavage measurement in step d), with the labeled nucleotide d) measuring the fluorescence polarization of the label during step c); and
,e) comparing the fluorescence polarization measurements of step b) with step d). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of detecting cleavage of a nucleic acid comprising:
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a) covalently attaching a fluorescence emitting label to a nucleotide of the nucleic acid; b) measuring the fluorescence polarization of the label before step c); c) mixing a reagent to be tested with the labeled nucleic acid wherein the reagent does not interact, in a manner that would diminish reagent activity enough to reduce useful sensitivity of cleavage measurement in step e), with the labeled nucleotide d) incubating the mixture of step c) for a time sufficient for the reagent to react with the nucleic acid; e) measuring the fluorescence polarization of the label after step d); and
,f) measuring the activity of the reagent by the degree of change in fluorescence polarization of the label. - View Dependent Claims (13, 14, 15, 16)
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Specification