Method for 3′ end-labeling ribonucleic acids
First Claim
1. A method of end-labeling a ribonucleic acid, said method comprising:
- covalently attaching with a prokaryotic poly(A) polymerase at least one ribonucleotide to the 3′
end of said ribonucleic acid, wherein the ribonucleotide is an ATP analog labeled with a cyanine compound;
whereby said ribonucleic acid is end-labeled.
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Abstract
Methods of end-labeling ribonucleic acids with non-radioactively labeled ribonucleotides, and particularly fluorescently labeled ribonucleotides, are provided. In the subject methods, a ribonucleic acid is contacted with a non-radioactively labeled ribonucleotide in the presence of a prokaryotic, usually bacterial, poly(A) polymerase under conditions sufficient for covalent bonding of the labeled ribonucleotide to the 3′ end of the ribonucleic acid to occur. Also provided are kits for practicing the subject method. The subject methods and kits find use in a variety of applications where labeling of the 3′ end of a ribonucleic acid with a non-radioactive label, particularly a fluorescent label, is desired.
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Citations
9 Claims
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1. A method of end-labeling a ribonucleic acid, said method comprising:
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covalently attaching with a prokaryotic poly(A) polymerase at least one ribonucleotide to the 3′
end of said ribonucleic acid, wherein the ribonucleotide is an ATP analog labeled with a cyanine compound;
whereby said ribonucleic acid is end-labeled. - View Dependent Claims (2, 3, 4, 8)
CY5-ATP dyes;
CY7-ATP dyes; and
CY3-ATP dyes.
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5. A method of fluorescently end-labeling a ribonucleic acid, said method comprising:
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contacting said ribonucleic acid with fluorescently labeled ribonucleotide analog in the presence of a bacterial poly(A) polymerase under conditions sufficient for said polymerase to covalently attach at least one fluorescently labeled ribonucleotide analog to the 3′
end of said ribonucleic acid, wherein the fluorescently labeled ribonucleotide is an ATP analog labeled with a cyanine compound;
whereby said ribonucleic acid is fluorescently end-labeled. - View Dependent Claims (6, 7, 9)
CY5-ATP dyes;
CY7-ATP dyes; and
CY3-ATP dyes.
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Specification