Labeled reactants and their uses
First Claim
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1. A method of monitoring an enzyme reaction, comprising:
- providing a reaction mixture comprising the enzyme and at least a first reactant composition, the reactant composition comprising a compound having (i) a reactant component comprising a nucleotide, (ii) a fluorescent label component, and (iii) a linker component joining the reactant component to the label component, wherein the linker component is coupled to the reactant component through a phosphate group on the nucleotide, and the linker component maintains the label component at a functional distance away from the reactant component such that a reduction in the activity of the enzyme is reduced by at least 20%;
illuminating the reaction mixture to excite the fluorescent label component; and
detecting a fluorescent signal from the reaction mixture characteristic of the enzyme reaction.
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Abstract
Labeled reactant compositions, and particularly labeled nucleic acid reaction compositions, that include structural components that maintain potentially damaging labeling components sufficiently distal from the reactant portion of the molecule such that damaging effects of the label group on other reaction components, such as enzymes, are reduced, minimized and/or eliminated.
36 Citations
24 Claims
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1. A method of monitoring an enzyme reaction, comprising:
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providing a reaction mixture comprising the enzyme and at least a first reactant composition, the reactant composition comprising a compound having (i) a reactant component comprising a nucleotide, (ii) a fluorescent label component, and (iii) a linker component joining the reactant component to the label component, wherein the linker component is coupled to the reactant component through a phosphate group on the nucleotide, and the linker component maintains the label component at a functional distance away from the reactant component such that a reduction in the activity of the enzyme is reduced by at least 20%; illuminating the reaction mixture to excite the fluorescent label component; and detecting a fluorescent signal from the reaction mixture characteristic of the enzyme reaction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of nucleic acid sequencing, comprising:
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providing a reaction mixture comprising a polymerase enzyme, a template nucleic acid having a sequence, and a reactant composition, the reactant composition comprising nucleotide analogs, each having (i) a reactant portion comprising a nucleotide, (ii) a fluorescent label portion, and (iii) a linker joining the reactant portion to the label portion, wherein the linker is coupled to the reactant portion through a phosphate group on the nucleotide, and the linker component maintains the label component at a functional distance away from the reactant component such that a reduction in the activity of the enzyme is reduced by at least 20%; illuminating the reaction mixture to excite the fluorescent label portions; and detecting fluorescent signals to determine nucleotide incorporation in real time, thereby obtaining information about the template sequence. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification