Methods, systems and compositions for monitoring enzyme activity and applications thereof
First Claim
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1. A method of monitoring an activity of an enzyme that is capable of producing pyrophosphate from a nucleoside triphosphate, comprising:
- contacting the enzyme with an unlabeled nucleoside polyphosphate having more than three phosphate groups; and
detecting polyphosphate released from the nucleoside polyphosphate as an indicator of enzyme activity, wherein the step of detecting the polyphosphate comprises;
contacting the polyphosphate with an enzyme system capable of producing two or more ATP molecules from each polyphosphate molecule released; and
detecting the ATP produced.
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Abstract
Methods of monitoring enzyme mediated reactions, and particularly nucleic acid synthesis reactions such as pyrosequencing methods that employ enzymatic reporter systems. The methods and systems provide elevated signal levels as compared to conventional pyrosequencing processes, and/or mediate de-phasing of sequencing analyses employing pyrosequencing or other “sequencing by synthesis” methods.
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Citations
9 Claims
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1. A method of monitoring an activity of an enzyme that is capable of producing pyrophosphate from a nucleoside triphosphate, comprising:
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contacting the enzyme with an unlabeled nucleoside polyphosphate having more than three phosphate groups; and detecting polyphosphate released from the nucleoside polyphosphate as an indicator of enzyme activity, wherein the step of detecting the polyphosphate comprises; contacting the polyphosphate with an enzyme system capable of producing two or more ATP molecules from each polyphosphate molecule released; and detecting the ATP produced. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of monitoring an activity of a polymerase enzyme, comprising:
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contacting the polymerase enzyme with a nucleoside polyphosphate comprising more than three phosphate groups, wherein the polymerase releases a polyphosphate group having at least three phosphates; converting the polyphosphate group into at least two ATP molecules for each polyphosphate group released; and detecting an amount of ATP produced in the converting step as an indication of an activity of the polymerase enzyme.
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9. A method of monitoring an activity of an enzyme system that is capable of releasing pyrophosphate from a nucleoside triphosphate, comprising:
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contacting the enzyme system with a nucleoside polyphosphate having more than three phosphate groups, and contacting polyphosphate released from the nucleoside polyphosphate with an enzyme system capable of producing two or more ATP molecules from each polyphosphate molecule; and detecting ATP produced.
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Specification