Nucleotide analogs
First Claim
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1. A nucleotide analog, comprising:
- A nitrogenous base;
A linker attached at the N4, N6, O4, or O6 of said nitrogeneous base; and
A detectable label attached to said nitrogenous base via said linker,wherein said linker comprises a cleavable bond such that a native nucleotide monophosphate is regenerated upon incorporation of said analog into a nucleic acid duplex.
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Abstract
The disclosure provides nucleotide analogs and methods of their use. Analogs of the invention comprise a reporter molecule (label) attached via the N4, N6, O4, or O6 position of the nitrogenous base portion of the analog. In a preferred embodiment, nucleotide analogs of the invention comprise a label attached to the nitrogenous base portion of the analog via a cleavable linker at the N4, O4, N6 or O6 position.
20 Citations
14 Claims
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1. A nucleotide analog, comprising:
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A nitrogenous base; A linker attached at the N4, N6, O4, or O6 of said nitrogeneous base; and A detectable label attached to said nitrogenous base via said linker, wherein said linker comprises a cleavable bond such that a native nucleotide monophosphate is regenerated upon incorporation of said analog into a nucleic acid duplex. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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5. The nucleotide analog of claim 4, wherein X is an alkyl group or an aryl group.
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6. The nucleotide analog of claim 4, wherein said alkyl group comprises between about 2 and about 10 atoms.
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7. The nucleotide analog of claim 1, wherein said label is selected from cyanine-5, Cy-5, Cy-3, Joe, Rox, and TAMRA.
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8. The nucleotide analog of claim 1, wherein said analog has the structure:
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9. The nucleotide analog of claim 8, wherein X is (CH2)n, and wherein n is between about 2 and about 10.
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10. The nucleotide analog of claim 8, wherein Y is a carbonyl.
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11. The nucleotide analog of claim 8, wherein said label is an optically-detectable label.
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12. The nucleotide analog of claim 11, wherein said detectable label is selected from cyanine-5, Cy-5, Cy-3, Joe, Rox, and TAMRA.
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13. A method for sequencing a nucleic acid, the method comprising the steps of:
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anchoring a nucleic acid duplex to a surface, the duplex comprising a template portion and a primer portion hybridized thereto; Exposing said duplex to an analog of claim 4 or claim 10 in the presence of a polymerase capable of catalyzing addition of said analog to said primer portion in a template-dependent manner; Removing unincorporated analog and polymerase; Detecting incorporation of analog into said primer; and Repeating said exposing, removing, and detecting steps at least once.
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14. The method of claim 13, further comprising the step of cleaving detectable label from said analog after said detecting step.
Specification