Methods and compositions for RNA-directed target DNA modification and for RNA-directed modulation of transcription

Patent metadata

Field	Value
Publication number	US-12180503-B2
Application number	US-202117348596-A
Country	US
Kind code	B2
Filing date	Jun 15, 2021
Priority date	May 25, 2012
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

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.

First claim

What is claimed is:

1. A composition comprising:
(a) a Cas9 protein or a nucleic acid encoding the Cas9 protein, wherein the Cas9 protein is a Streptococcus pyogenes Cas9; and
(b) a single molecule DNA-targeting RNA or a nucleic acid encoding the single molecule DNA-targeting RNA, wherein the single molecule DNA-targeting RNA comprises in 5′ to 3′ order:
(i) a targeter-RNA comprising: (1) a first nucleotide sequence that hybridizes with a target sequence of a target DNA, and (2) a second nucleotide sequence that hybridizes with an activator-RNA; and
(ii) the activator-RNA, which 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 (i) and (ii) are covalently linked by intervening nucleotides,

wherein the single molecule DNA-targeting RNA is capable of forming a complex with the Cas9 protein and guiding the complex to the target sequence to cleave the target DNA.

2. The composition of claim 1 , wherein the first nucleotide sequence comprises 18 to 25 nucleotides that hybridize with the target sequence.

3. The composition of claim 1 , wherein the first and second nucleotide sequences are heterologous to one another.

4. The composition of claim 1 , wherein said intervening nucleotides are 3-5 nucleotides.

5. The composition of claim 1 , wherein said intervening nucleotides are 5-10 nucleotides.

6. The composition of claim 1 , wherein said intervening nucleotides are 10-20 nucleotides.

7. The composition of claim 1 , wherein said intervening nucleotides are 20-40 nucleotides.

8. The composition of claim 1 , said intervening nucleotides are 4 nucleotides.

9. The composition of claim 1 , further comprising a nuclease inhibitor and/or a buffering agent.

10. The composition of claim 1 , wherein the composition is sterile.

11. The composition of claim 1 , further comprising a reducing agent.

12. The composition of claim 1 , wherein the composition comprises a salt.

13. The composition of claim 1 , wherein the composition comprises one or more salts selected from: NaCl, MgCl 2 , KCl, and MgSO 4 .

14. The composition of claim 1 , further comprising a donor polynucleotide.

15. The composition of claim 1 , wherein the Cas9 protein comprises a mutation in a RuvC or an HNH domain.

16. The composition of claim 1 , wherein the Cas9 protein comprises a heterologous polypeptide.

17. The composition of claim 16 , wherein the heterologous polypeptide comprises an endosomolytic domain, an influenza HA domain, an IF2 domain, a GST domain, a GRPE domain, a 6×His tag, a hemagglutinin (HA) tag, or green fluorescent protein.

18. The composition of claim 1 , wherein the Cas9 protein is fused to a protein transduction domain (PTD).

19. The composition of claim 1 , wherein a protein transduction domain (PTD) is covalently linked to the amino terminus (N-terminus) of the Cas9 protein.

20. The composition of claim 1 , wherein a protein transduction domain (PTD) is covalently linked to the carboxyl terminus (C-terminus) of the Cas9 protein.

21. The composition of claim 1 , wherein the composition comprises a protein-RNA complex comprising the Cas9 protein and the single molecule DNA-targeting RNA.

22. The composition of claim 1 , comprising the single molecule DNA-targeting RNA and the nucleic acid encoding the Cas9 protein.

23. The composition of claim 1 , wherein the activator-RNA comprises the 67 nt tracrRNA sequence UAGCAAGUUAAAAUAAGGCUAGUCCGUUAUCAACUUGAAAAAGUGGCACCGAGUCGGU GCUUUUUUU (SEQ ID NO: 432); or the 26 nucleotide tracrRNA sequence UAGCAAGUUAAAAUAAGGCUAGUCCG (SEQ ID NO: 441).

24. The composition of claim 1 , comprising the single molecule DNA-targeting RNA, wherein the single molecule DNA-targeting RNA comprises one or more non-natural internucleoside linkages, one or more nucleic acid mimetics, one or more modified sugar moieties, one or more modified nucleobases, or any combination thereof.

25. The composition of claim 7 , wherein the single molecule DNA-targeting RNA comprises said one or more non-natural internucleoside linkages and/or said one or more modified sugar moieties.

26. The composition of claim 1 , comprising the single molecule DNA-targeting RNA, wherein the single molecule DNA-targeting RNA comprises one or more phosphorothioates, one or more inverted polarity linkages, one or more abasic nucleoside linkages, one or more locked nucleic acids (LNAs), one or more 2′-O-methoxyethyl modified sugar moieties, one or more 2′-O-methyl modified sugar moieties, one or more 2′-O-(2-methoxyethyl) modified sugar moieties, one or more 2′-fluoro modified sugar moieties, one or more 2′-dimethylaminooxyethoxy modified sugar moieties, one or more 2′-dimethylaminoethoxyethoxy modified sugar moieties, one or more peptide nucleic acids (PNAs), one or more morpholino nucleic acids, one or more cyclohexenyl nucleic acids (CeNAs), or any combination thereof.

27. The composition of claim 26 , wherein the single molecule DNA-targeting RNA comprises said one or more 2′-O-methyl modified sugar moieties and/or said one or more 2′-fluoro modified sugar moieties.

28. The composition of claim 1 , comprising the single molecule DNA-targeting RNA, wherein the single molecule DNA-targeting RNA comprises a heterologous moiety.

29. A composition comprising one or more nucleic acids, wherein said one or more nucleic acids encode:
(a) a Cas9 protein that is a Streptococcus pyogenes Cas9; and
(b) a single molecule DNA-targeting RNA comprising in 5′ to 3′ order:
(i) a targeter-RNA comprising: (1) a first nucleotide sequence that hybridizes with a target sequence of a target DNA, and (2) a second nucleotide sequence that hybridizes with an activator-RNA; and
(ii) an activator-RNA that is capable of hybridizing 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 (i) and (ii) are covalently linked by intervening nucleotides,

wherein the single molecule DNA-targeting RNA is capable of forming a complex with the Cas9 protein and guiding the complex to the target sequence to cleave the target DNA.

30. The composition of claim 29 , wherein at least one of said one or more nucleic acids is a plasmid, a cosmid, a minicircle, a phage, or a viral vector.

31. The composition of claim 29 , wherein at least one of said one or more nucleic acids is a vaccinia, polio, retro, lenti, adeno, adeno-associated, or herpes simplex viral vector.

32. The composition of claim 29 , wherein the first and second nucleotide sequences are heterologous to one another.

33. The composition of claim 29 , wherein said one or more nucleic acids comprises:
a nucleotide sequence encoding said Cas9 protein, wherein the nucleotide sequence encoding said Cas9 protein is operably linked to a heterologous promoter; and/or
a nucleotide sequence encoding said single molecule DNA-targeting RNA, wherein the nucleotide sequence encoding said single molecule DNA-targeting RNA is operably linked to a heterologous promoter.

34. The composition of claim 29 , further comprising a nuclease inhibitor and/or a buffering agent.

35. The composition of claim 29 , where

Assignees

• Univ California
• Univ Vienna
• Charpentier Emmanuelle

Inventors

• Doudna Jennifer A
• Jinek Martin
• Chylinski Krzysztof
• Charpentier Emmanuelle

Classifications

• H10P14/6512

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• H10P14/20

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• H10H20/0137

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• A01K67/027

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• A01H6/4684

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