Systems, methods and compositions for sequence manipulation with optimized functional CRISPR-Cas systems
The invention provides for systems, methods, and compositions for altering expression of target gene sequences and related gene products. Provided are structural information on the Cas protein of the CRISPR-Cas system, use of this information in generating modified components of the CRISPR complex, vectors and vector systems which encode one or more components or modified components of a CRISPR complex, as well as methods for the design and use of such vectors and components. Also provided are methods of directing CRISPR complex formation in eukaryotic cells and methods for utilizing the CRISPR-Cas system. In particular the present invention comprehends optimized functional CRISPR-Cas enzyme systems.
1. A CRISPR-Cas system RNA comprising a guide sequence capable of hybridizing to a target sequence in a genomic locus of interest in a cell, and a modified loop comprising an insertion of a distinct RNA sequence capable of binding to an adaptor protein into a tetraloop and/or a stem-loop 2 of the CRISPR-Cas system RNA.
2. The CRISPR-Cas system RNA of claim 1 , wherein the distinct RNA sequence comprises an aptamer sequence.
3. The CRISPR-Cas system RNA of claim 1 , wherein the CRISPR-Cas system RNA comprises at least two modified loops, wherein each modified loop is modified by insertion of a distinct RNA sequence capable of binding to an adaptor protein.
4. The CRISPR-Cas system RNA of claim 3 , wherein both tetraloop and stem-loop 2 of the CRISPR-Cas system RNA are modified.
5. The CRISPR-Cas system RNA of claim 3 , wherein the at least two modified loops are modified by insertion of the same aptamer sequence.
6. The CRISPR-Cas system RNA of claim 3 , wherein the at least two modified loops are modified by insertion of different aptamer sequences capable of binding to different adaptor proteins.
7. The CRISPR-Cas system RNA of claim 1 , wherein the CRISPR-Cas system RNA comprises at least one unmodified loop that does not comprise an insertion of the distinct RNA sequence.
8. The CRISPR-Cas system RNA of claim 7 , wherein the unmodified loop is tetraloop or stem-loop 2.
9. The CRISPR-Cas system RNA of claim 1 , wherein the CRISPR-Cas system RNA is a chimeric RNA.
10. The CRISPR-Cas system RNA of claim 1 , wherein the CRISPR-Cas system RNA comprises the guide sequence fused to a tracr sequence.
11. A composition comprising the CRISPR-Cas system RNA of claim 1 , and further comprising a Cas9.
12. The composition of claim 11 , wherein the Cas9 comprises at least one nuclear localization sequence.
13. The composition of claim 11 , wherein the Cas9 comprises at least one mutation such that the Cas9 has no more than 5% of the nuclease activity of a corresponding Cas9 not having the at least one mutation.
14. The composition of claim 13 , wherein the Cas9 has a diminished nuclease activity of at least 97% as compared with a corresponding Cas9 not having the at least one mutation.
15. The composition of claim 13 , wherein the Cas9 comprises two or more mutations, wherein two or more of D10, E762, H840, N854, N863, or D986 according to Streptococcus pyogenes Cas9 or any corresponding ortholog or N580 according to Staphylococcus aureus Cas9 or any corresponding ortholog are mutated.
16. The composition of claim 13 , wherein the at least one mutation comprises an H840A mutation according to Streptococcus pyogenes Cas9.
17. The composition of claim 13 , wherein the Cas9 comprises H840A, or D10A and H840A, or D10A and N863A, according to Streptococcus pyogenes Cas9 or any corresponding ortholog.
18. The composition of claim 13 , wherein the Cas9 comprises N580A according to Staphylococcus aureus Cas9 or any corresponding ortholog; or D10A according to a Streptococcus pyogenes Cas9 or any corresponding ortholog, and N580A according to Staphylococcus aureus Cas9 or any corresponding ortholog.
19. The composition of claim 11 , further comprising an adaptor protein, wherein the adaptor protein is associated with a functional domain.
20. The composition of claim 11 , comprising at least two different CRISPR-Cas system RNAs each capable of hybridizing to a different target sequence.
21. The composition of claim 11 , comprising at least two different CRISPR-Cas system RNAs each capable of binding to a different adaptor protein.
22. The composition of claim 19 , wherein the adaptor protein is a fusion protein comprising the functional domain, wherein the fusion protein comprises a linker between the adaptor protein and the functional domain, wherein optionally the linker comprises a GlySer linker.
23. The composition of claim 19 , wherein the functional domain is a transcriptional activation domain.
24. The composition of claim 23 , wherein the transcriptional activation domain comprises a transcriptional activation domain of VP64, p65, MyoD1, HSF1, RTA, or SET7/9.
25. The composition of claim 19 , wherein the functional domain is a transcriptional repressor domain.
26. The composition of claim 25 , wherein the transcriptional repressor domain is a KRAB domain, NuE domain, NcoR domain, SID domain or a SID4X domain.
27. The composition of claim 19 , wherein the functional domain has at least one of: methylase activity, demethylase activity, transcription activation activity, transcription repression activity, transcription release factor activity, histone modification activity, RNA cleavage activity, DNA cleavage activity, DNA integration activity, or nucleic acid binding activity.
28. The composition of claim 27 , wherein the functional domain has DNA cleavage activity and comprises a nuclease.
29. The composition of claim 28 , wherein the nuclease comprises a Fok1 nuclease.
30. The composition of claim 19 , wherein the adaptor protein comprises at least one of: MS2, PP7, Qβ, F2, GA, fr, JP501, M12, R17, BZ13, JP34, JP500, KU1, M11, MX1, TW18, VK, SP, FI, ID2, NL95, TW19, AP205, ϕCb5, ϕCb8r, ϕCb12r, ϕCb23r, 7s, or PRR1.