Methods for nucleic acid editing
First Claim
1. A method of DNA editing, the method comprising contacting a DNA molecule with(a) a fusion protein comprising (i) a nuclease-inactive Cas9 (dCas9) comprising an amino acid sequence that is at least 95% identical to the amino acid sequence of SEQ ID NO:
- 4, wherein the dCas9 comprises an alanine at a position corresponding to position 10 in SEQ ID NO;
4, and (ii) a cytidine deaminase; and
(b) a single-guide RNA (sgRNA) targeting the fusion protein of (a) to a target nucleotide sequence of the DNA molecule, comprising the nucleotide sequence of 5′
-[a guide sequence]-guuuuagagcuagaaauagcaaguuaaaauaaaggcuaguccguuaucaacuugaaaaaguggcaccgagucggugcuuuuu-3′
(SEQ ID NO;
38), wherein the guide sequence comprises a RNA sequence that is complementary to the target nucleotide sequence of the DNA molecule;
wherein the DNA molecule is contacted with the fusion protein and the sgRNA in an amount effective and under conditions suitable for a deamination of a nucleotide base, wherein the method results in the deamination of a nucleotide base within the DNA molecule.
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Abstract
Some aspects of this disclosure provide strategies, systems, reagents, methods, and kits that are useful for the targeted editing of nucleic acids, including editing a single site within the genome of a cell or subject, e.g., within the human genome. In some embodiments, fusion proteins of Cas9 and nucleic acid editing enzymes or enzyme domains, e.g., deaminase domains, are provided. In some embodiments, methods for targeted nucleic acid editing are provided. In some embodiments, reagents and kits for the generation of targeted nucleic acid editing proteins, e.g., fusion proteins of Cas9 and nucleic acid editing enzymes or domains, are provided.
219 Citations
20 Claims
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1. A method of DNA editing, the method comprising contacting a DNA molecule with
(a) a fusion protein comprising (i) a nuclease-inactive Cas9 (dCas9) comprising an amino acid sequence that is at least 95% identical to the amino acid sequence of SEQ ID NO: - 4, wherein the dCas9 comprises an alanine at a position corresponding to position 10 in SEQ ID NO;
4, and (ii) a cytidine deaminase; and(b) a single-guide RNA (sgRNA) targeting the fusion protein of (a) to a target nucleotide sequence of the DNA molecule, comprising the nucleotide sequence of 5′
-[a guide sequence]-guuuuagagcuagaaauagcaaguuaaaauaaaggcuaguccguuaucaacuugaaaaaguggcaccgagucggugcuuuuu-3′
(SEQ ID NO;
38), wherein the guide sequence comprises a RNA sequence that is complementary to the target nucleotide sequence of the DNA molecule;wherein the DNA molecule is contacted with the fusion protein and the sgRNA in an amount effective and under conditions suitable for a deamination of a nucleotide base, wherein the method results in the deamination of a nucleotide base within the DNA molecule. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- 4, wherein the dCas9 comprises an alanine at a position corresponding to position 10 in SEQ ID NO;
Specification