Methods and compositions for RNA-directed target DNA modification and for RNA-directed modulation of transcription
First Claim
1. A method of targeting and binding a target DNA in a prokaryotic cell, the method comprising:
- contacting the target DNA inside of the prokaryotic cell with a complex that comprises;
(a) a Cas9 protein; and
(b) a DNA-targeting RNA comprising;
(i) a targeter-RNA comprising a nucleotide sequence that is complementary to, and hybridizes with, a target sequence of the target DNA; and
(ii) an activator-RNA that hybridizes with the targeter-RNA to form a double-stranded RNA duplex, wherein the activator-RNA hybridizes with the targeter-RNA to form a total of 8 to 15 base pairs, and wherein the activator-RNA;
(1) comprises one or more of;
a non-natural internucleoside linkage, a nucleic acid mimetic, a modified sugar moiety, and a modified nucleobase, and/or (2) comprises a heterologous moiety,wherein the complex binds to the target DNA.
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Abstract
The present disclosure provides a DNA-targeting RNA that comprises a targeting sequence and, together with a modifying polypeptide, provides for site-specific modification of a target DNA and/or a polypeptide associated with the target DNA. The present disclosure further provides site-specific modifying polypeptides. The present disclosure further provides methods of site-specific modification of a target DNA and/or a polypeptide associated with the target DNA The present disclosure provides methods of modulating transcription of a target nucleic acid in a target cell, generally involving contacting the target nucleic acid with an enzymatically inactive Cas9 polypeptide and a DNA-targeting RNA. Kits and compositions for carrying out the methods are also provided. The present disclosure provides genetically modified cells that produce Cas9; and Cas9 transgenic non-human multicellular organisms.
243 Citations
48 Claims
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1. A method of targeting and binding a target DNA in a prokaryotic cell, the method comprising:
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contacting the target DNA inside of the prokaryotic cell with a complex that comprises; (a) a Cas9 protein; and (b) a DNA-targeting RNA comprising; (i) a targeter-RNA comprising a nucleotide sequence that is complementary to, and hybridizes with, a target sequence of the target DNA; and (ii) an activator-RNA that hybridizes with the targeter-RNA to form a double-stranded RNA duplex, wherein the activator-RNA hybridizes with the targeter-RNA to form a total of 8 to 15 base pairs, and wherein the activator-RNA;
(1) comprises one or more of;
a non-natural internucleoside linkage, a nucleic acid mimetic, a modified sugar moiety, and a modified nucleobase, and/or (2) comprises a heterologous moiety,wherein the complex binds to the target DNA. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of cleaving a target DNA in a prokaryotic cell, the method comprising:
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contacting the target DNA inside of the prokaryotic cell with a complex that comprises; (a) a Cas9 protein; and (b) a DNA-targeting RNA comprising; (i) a targeter-RNA comprising a nucleotide sequence that is complementary to, and hybridizes with, a target sequence of the target DNA; and (ii) an activator-RNA that hybridizes with the targeter-RNA to form a double-stranded RNA duplex, wherein the activator-RNA hybridizes with the targeter-RNA to form a total of 8 to 15 base pairs, and wherein the activator-RNA;
(1) comprises one or more of;
a non-natural internucleoside linkage, a nucleic acid mimetic, a modified sugar moiety, and a modified nucleobase, and/or (2) comprises a heterologous moiety,wherein said contacting results in cleavage of the target DNA. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A method of targeting and binding a target DNA in a prokaryotic cell, the method comprising:
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contacting the target DNA inside of the prokaryotic cell with a complex that comprises; (a) a Cas9 protein; and (b) a DNA-targeting RNA comprising; (i) a targeter-RNA comprising a nucleotide sequence that is complementary to, and hybridizes with, a target sequence of the target DNA; and (ii) an activator-RNA that hybridizes with the targeter-RNA to form a double-stranded RNA duplex, wherein the activator-RNA hybridizes with the targeter-RNA to form a total of 8 to 15 base pairs, wherein the activator-RNA and the targeter-RNA are conjugated to a heterologous moiety, wherein said contacting results in modification of the target DNA.
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31. A method of targeting and binding a target DNA, the method comprising:
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contacting a target DNA in a prokaryotic cell with a complex that comprises; (a) a Cas9 protein; and (b) a DNA-targeting RNA comprising; (i) a targeter-RNA comprising;
a first nucleotide sequence that is complementary to, and hybridizes with, a target sequence of the target DNA, and a second nucleotide sequence that hybridizes with an activator-RNA, wherein the first and second nucleotide sequences are heterologous to one another; and(ii) the activator-RNA that hybridizes with the targeter-RNA to form a double-stranded RNA duplex, wherein the activator-RNA hybridizes with the targeter-RNA to form a total of 8 to 15 base pairs, wherein the complex binds to the target DNA. - View Dependent Claims (32, 33, 34, 35, 36)
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37. A method of modifying a target DNA, the method comprising:
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contacting a target DNA in a prokaryotic cell with a complex that comprises; (a) a Cas9 protein; and (b) a DNA-targeting RNA comprising; (i) a targeter-RNA comprising;
a first nucleotide sequence that is complementary to, and hybridizes with, a target sequence of the target DNA, and a second nucleotide sequence that hybridizes with an activator-RNA, wherein the first and second nucleotide sequences are heterologous to one another; and(ii) the activator-RNA that hybridizes with the targeter-RNA to form a double-stranded RNA duplex, wherein the activator-RNA hybridizes with the targeter-RNA to form a total of 8 to 15 base pairs, wherein said contacting results in modification of the target DNA. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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Specification