Methods and compositions for RNA-directed target DNA modification and for RNA-directed modulation of transcription
First Claim
1. A method of modulating transcription from a target DNA molecule, the method comprising:
- contacting a target DNA molecule inside of a cell with a complex comprising;
(a) a chimeric Cas9 protein comprising a Cas9 polypeptide fused to a heterologous polypeptide, wherein the Cas9 polypeptide comprises one or more mutations in a RuvC domain and/or a HNH domain; and
(b) a DNA-targeting RNA comprising;
(i) a targeter-RNA that hybridizes with a target sequence of the target DNA molecule, and(ii) an activator-RNA that hybridizes with the targeter-RNA to form a double-stranded RNA (dsRNA) duplex of a protein-binding segment, wherein the activator-RNA hybridizes with the targeter-RNA to form a total of 8 to 15 base pairs,thereby resulting in modulation of transcription from the target DNA molecule.
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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.
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Citations
28 Claims
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1. A method of modulating transcription from a target DNA molecule, the method comprising:
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contacting a target DNA molecule inside of a cell with a complex comprising; (a) a chimeric Cas9 protein comprising a Cas9 polypeptide fused to a heterologous polypeptide, wherein the Cas9 polypeptide comprises one or more mutations in a RuvC domain and/or a HNH domain; and (b) a DNA-targeting RNA comprising; (i) a targeter-RNA that hybridizes with a target sequence of the target DNA molecule, and (ii) an activator-RNA that hybridizes with the targeter-RNA to form a double-stranded RNA (dsRNA) duplex of a protein-binding segment, wherein the activator-RNA hybridizes with the targeter-RNA to form a total of 8 to 15 base pairs, thereby resulting in modulation of transcription from the target DNA molecule. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification