NZ754902A - Genome engineering - Google Patents

Abstract

The present invention provides an in vitro or ex-vivo method of altering target DNA in a cell wherein the cell is genetically modified to include a nucleic acid encoding a Cas9 enzyme, in the genomic DNA of the cell, that forms a co-localization complex with a guide RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner comprising (a) introducing into the cell a donor nucleic acid sequence, introducing into the cell from media surrounding the cell a guide RNA complementary to the target DNA and which guides the Cas9 enzyme to the target DNA, wherein the guide RNA comprises phosphatase treated guide RNA provided to the cell from surrounding media that is continuously supplemented with the phosphatase treated guide RNA to allow continuous target DNA editing, and wherein the guide RNA and the Cas9 enzyme are members of a co-localization complex for the target DNA, wherein the guide RNA and the Cas9 enzyme co-localize to the target DNA, the Cas9 enzyme cleaves the target DNA and the donor nucleic acid is inserted into the target DNA to produce altered DNA in the cell, and wherein the cell is not a totipotent or germline human cell.

Description

GENOME ENGINEERING RELATED APPLICATION DATA This application is a divisional of New Zealand patent application 716606, which is the national phase entry in New Zealand of PCT ational ation shed as WO 13583), and claims priority to U.S. Provisional Patent Application No. 61/858,866 filed on July 26, 2013 and is hereby incorporated herein by reference in its entirety for all purposes.

STATEMENT OF GOVERNMENT INTERESTS This invention was made with ment t under P50 HG003170 from the National Human Genome Research Center for Excellence in Genomics Science. The government has certain rights in the invention.

BACKGROUND Genome editing via sequence-specific nucleases is known. See references 1, 2, and 3 hereby incorporated by nce in their entireties. A se-mediated double-stranded DNA (dsDNA) break in the genome can be repaired by two main mechanisms: Non-Homologous End Joining (NHEJ), which ntly results in the introduction of non-specific insertions and deletions (indels), or homology directed repair (HDR), which incorporates a homologous strand as a repair template. See reference 4 hereby incorporated by reference in its entirety. When a sequence-specific nuclease is red along with a homologous donor DNA construct containing the d mutations, gene targeting efficiencies are increased by 1000-fold compared to just the donor construct alone. See reference 5 hereby incorporated by reference in its entirety. Use of single stranded oligodeoxyribonucleotides ("ssODNs") as DNA donors has been reported. See references 21 and 22 hereby orated by reference in their entireties.

Despite large advances in gene editing tools, many challenges and questions remain regarding the use of custom-engineered nucleases in human induced pluripotent stem cell ("hiPSC") engineering. First, despite their design simplicity, Transcription Activator-Like Effectors Nucleases (TALENs) target particular DNA sequences with tandem copies of Repeat Variable Diresidue (RVD) domains. See reference 6 hereby orated by reference in its entirtety. While the modular nature of RVDs simplifies TALEN design, their repetitive sequences complicate s for synthesizing their DNA constructs (see references 2, 9, and 15-19 hereby incorporated by reference in their entireties) and also impair their use with lentiviral gene delivery vehicles. See reference 13 hereby incorporated by reference in its entirety.

In current practice, NHEJ and HDR are ntly evaluated using separate assays.

Mismatch-sensitive endonuclease assays (see reference 14 hereby incorporated by reference in its entirety) are often used for assessing NHEJ, but the quantitative accuracy of this method is variable and the sensitivity is limited to NHEJ frequencies greater than~3%. See reference 15 hereby incorporated by reference in its entirety. HDR is ntly assessed by cloning and sequencing, a tely different and often some procedure. Sensitivity is still an issue because, while high editing frequencies on the order of 50% are frequently reported for some cell types, such as U2OS and K562 (see references 12 and 14 hereby incorporated by reference in their entireties), frequencies are generally lower in hiPSCs. See reference 10 hereby incorporated by reference in its entirety. Recently, high editing frequencies have been reported in hiPSC and hESC using TALENs (see reference 9 hereby incorporated by reference in its entirety), and even higher frequencies with the CRISPR Cas9-gRNA system (see references 16-19 hereby orated by reference in their entireties. However, editing rates at different sites appear to vary widely (see reference 17 hereby incorporated by reference in its entirety), and editing is mes not detectable at all at some sites (see reference 20 hereby orated by reference in its entirety).

Bacterial and archaeal CRISPR-Cas systems rely on short guide RNAs in complex with Cas proteins to direct degradation of complementary sequences present within invading foreign nucleic acid. See Deltcheva, E. et al. CRISPR RNA maturation by trans-encoded small RNA and host factor RNase III. Nature 471, 602-607 (2011); Gasiunas, G., gou, R., Horvath, P. & s, V. Cas9-crRNA cleoprotein complex mediates specific DNA cleavage for adaptive immunity in bacteria. Proceedings of the National y of Sciences of the United States of a 109, E2579-2586 (2012); Jinek, M. et al. A programmable dual-RNA-guided DNA endonuclease in adaptive bacterial immunity. Science 337, 816-821 (2012); Sapranauskas, R. et al.

The Streptococcus thermophilus CRISPR/Cas system provides immunity in Escherichia coli.

Nucleic acids research 39, 9275-9282 (2011); and Bhaya, D., Davison, M. & Barrangou, R.

CRISPR-Cas systems in bacteria and archaea: versatile small RNAs for adaptive e and regulation. Annual review of genetics 45, 273-297 (2011). A recent in vitro reconstitution of the S. es type II CRISPR system demonstrated that crRNA ("CRISPR RNA") fused to a normally trans-encoded tracrRNA ("trans-activating CRISPR RNA") is sufficient to direct Cas9 protein to sequence-specifically cleave target DNA sequences matching the crRNA. Expressing a gRNA homologous to a target site results in Cas9 tment and degradation of the target DNA. See H.

Deveau et al., Phage response to CRISPR-encoded resistance in Streptococcus thermophilus.

Journal of Bacteriology 190, 1390 (Feb, 2008). It is an object of the present invention to go some way s overcoming these problems and/or to at least provide the public with a useful choice.

SUMMARY In a first aspect the present invention provides an in vitro or ex-vivo method of ng target DNA in a cell wherein the cell is genetically modified to include a c acid encoding a Cas9 enzyme, in the genomic DNA of the cell, that forms a co-localization complex with a guide RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner comprising (a) introducing into the cell a donor nucleic acid sequence, introducing into the cell from media surrounding the cell a guide RNA complementary to the target DNA and which guides the Cas9 enzyme to the target DNA, wherein the guide RNA ses phosphatase treated guide RNA provided to the cell from nding media that is continuously supplemented with the phosphatase treated guide RNA to allow continuous target DNA editing, and wherein the guide RNA and the Cas9 enzyme are members of a co-localization complex for the target DNA, wherein the guide RNA and the Cas9 enzyme alize to the target DNA, the Cas9 enzyme cleaves the target DNA and the donor nucleic acid is inserted into the target DNA to produce altered DNA in the cell, and wherein the cell is not a totipotent or germline human cell.

Additional embodiments are directed to the use of ed Transcription Activator-Like Effector Nucleases (TALENs) for genetically modifying a cell, such as a somatic cell or a stem cell. TALENs are known to include repeat sequences. Embodiments of the present disclosure are directed to a method of altering target DNA in a cell including introducing into a cell a TALEN lacking repeat sequences 100 bp or longer wherein the TALEN cleaves the target DNA and the cell undergoes nonhomologous end joining to produce altered DNA in the cell. ing to certain embodiments, repeat sequences of d length have been removed from a TALEN. According to certain embodiments, the TALEN is devoid of repeat sequences of certain desired length.

According to certain embodiments, a TALEN is provided with repeat ces of desired length removed. According to certain embodiments, a TALEN is modified to remove repeat sequences of desired length. According to certain embodiments, a TALEN is ered to remove repeat sequences of desired length.

Embodiments of the present disclosure include methods of altering target DNA in a cell ing combining within a cell a TALEN g repeat sequences 100 bp or longer and a donor nucleic acid sequence wherein the TALEN cleaves the target DNA and the donor nucleic acid sequence is inserted into the DNA in the cell. Embodiments of the present disclosure are directed to a virus including a nucleic acid sequence encoding a TALEN lacking repeat sequences 100 bp or longer. Embodiments of the t disclosure are directed to a cell including a nucleic acid sequence encoding a TALEN lacking repeat sequences 100 bp or longer. According to certain embodiments described herein, the TALEN lacks repeat ces 100 bp or , 90 bp or longer, 80 bp or longer, 70 bp or longer, 60 bp or longer, 50 bp or longer, 40 bp or longer, 30 bp or longer, 20 bp or longer, 19 bp or longer, 18 bp or longer, 17 bp or longer, 16 bp or longer, 15 bp or longer, 14 bp or longer, 13 bp or longer, 12 bp or longer, 11 bp or longer, or 10 bp or longer.

Embodiments of the present disclosure are directed to making a TALE including combining an endonuclease, a DNA polymerase, a DNA ligase, an exonuclease, a plurality of nucleic acid dimer blocks encoding repeat variable due domains and a TALE-N/TF backbone vector including an endonuclease cutting site, activating the endonuclease to cut the /TF backbone vector at the endonuclease cutting site to produce a first end and a second end, activating the exonuclease to create a 3’ and a 5’ overhang on the TALE-N/TF backbone vector and the plurality of nucleic acid dimer blocks and to anneal the TALE-N/TF ne vector and the plurality of nucleic acid dimer blocks in a desired order, activating the DNA polymerase and the DNA ligase to connect the TALE-N/TF backbone vector and the plurality of c acid dimer . One of skill in the art will readily based on the present sure be able to identify suitable cleases, DNA polymerases, DNA ligases, exonucleases, nucleic acid dimer blocks encoding repeat variable diresidue domains and /TF backbone vectors.

Embodiments of the present disclosure are directed to a method of altering target DNA in a stem cell expressing an enzyme that forms a co-localization complex with RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner including (a) introducing into the stem cell a first foreign nucleic acid ng an RNA complementary to the target DNA and which guides the enzyme to the target DNA, wherein the RNA and the enzyme are members of a co-localization complex for the target DNA, introducing into the stem cell a second n nucleic acid encoding a donor nucleic acid sequence, wherein the RNA and the donor nucleic acid sequences are expressed, wherein the RNA and the enzyme co-localize to the target DNA, the enzyme cleaves the target DNA and the donor nucleic acid is inserted into the target DNA to produce altered DNA in the stem cell.

Embodiments of the present disclosure are directed to a stem cell including a first foreign nucleic acid encoding for an enzyme that forms a co-localization complex with RNA complementary to target DNA and that cleaves the target DNA in a site specific manner.

Embodiments of the t sure are directed to a cell ing a first foreign nucleic acid encoding for an enzyme that forms a co-localization complex with RNA complementary to target DNA and that cleaves the target DNA in a site specific manner and ing an inducible promoter for promoting expression of the enzyme. In this manner, expression can be regulated, for example, it can be started and it can be stopped.

Embodiments of the present disclosure are directed to a cell including a first foreign nucleic acid encoding for an enzyme that forms a co-localization complex with RNA complementary to target DNA and that s the target DNA in a site ic manner, wherein the first foreign nucleic acid is removable from genomic DNA of the cell using a removal enzyme, such as a transposase.

Embodiments of the present disclosure are directed to a method of ng target DNA in a cell expressing an enzyme that forms a co-localization complex with RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner ing (a) introducing into the cell a first foreign nucleic acid encoding a donor nucleic acid sequence, introducing into the cell from media surrounding the cell an RNA complementary to the target DNA and which guides the enzyme to the target DNA, wherein the RNA and the enzyme are members of a co- localization complex for the target DNA, wherein the donor nucleic acid sequence is expressed, wherein the RNA and the enzyme co-localize to the target DNA, the enzyme cleaves the target DNA and the donor nucleic acid is inserted into the target DNA to produce altered DNA in the cell.

Embodiments of the present disclosure are directed to the use of an RNA guided DNA g protein for genetically modifying a stem cell. In one embodiment, the stem cell has been genetically modified to include a nucleic acid encoding for the RNA guided DNA binding protein and the stem cell expresses the RNA guided DNA binding protein. According to a certain embodiment, donor nucleic acids for introducing specific mutations are optimized for genome editing using either the modified TALENs or the RNA guided DNA binding protein.

Embodiments of the present disclosure are directed to the modification of DNA, such as multiplex modification of DNA, in a stem cell using one or more guide RNAs (ribonucleic acids) to direct an enzyme having nuclease activity expressed by the stem cell, such as a DNA binding n having nuclease activity, to a target location on the DNA (deoxyribonucleic acid) n the enzyme cuts the DNA and an exogenous donor nucleic acid is inserted into the DNA, such as by gous recombination. Embodiments of the t disclosure e cycling or repeating steps of DNA modification on a stem cell to create a stem cell having multiple cations of DNA within the cell. Modifications may include insertion of exogenous donor nucleic acids.

Multiple exogenous nucleic acid insertions can be accomplished by a single step of introducing into a stem cell, which expresses the enzyme, nucleic acids encoding a plurality of RNAs and a ity of exogenous donor c acids, such as by co-transformation, wherein the RNAs are expressed and wherein each RNA in the plurality guides the enzyme to a particular site of the DNA, the enzyme cuts the DNA and one of the plurality of exogenous nucleic acids is inserted into the DNA at the cut site. According to this embodiment, many alterations or modification of the DNA in the cell are created in a single cycle.

Multiple exogenous nucleic acid insertions can be accomplished in a cell by repeated steps or cycles of introducing into a stem cell, which ses the , one or more nucleic acids encoding one or more RNAs or a plurality of RNAs and one or more exogenous nucleic acids or a plurality of exogenous c acids wherein the RNA is expressed and guides the enzyme to a ular site of the DNA, the enzyme cuts the DNA and the exogenous nucleic acid is inserted into the DNA at the cut site, so as to result in a cell having multiple alterations or ions of exogenous DNA into the DNA within the stem cell. According to one embodiment, the stem cell expressing the enzyme has been genetically altered to express the enzyme such as by introducing into the cell a nucleic acid encoding the enzyme and which can be expressed by the stem cell. In this manner, ments of the present disclosure include cycling the steps of introducing RNA into a stem cell which expresses the enzyme, introducing exogenous donor nucleic acid into the stem cell, expressing the RNA, forming a co-localization complex of the RNA, the enzyme and the DNA, enzymatic cutting of the DNA by the enzyme, and insertion of the donor nucleic acid into the DNA. Cycling or repeating of the above steps results in multiplexed genetic modification of a stem cell at multiple loci, i.e., a stem cell having multiple genetic modifications.

According to certain embodiments, DNA binding proteins or enzymes within the scope of the present disclosure include a protein that forms a complex with the guide RNA and with the guide RNA guiding the complex to a double stranded DNA sequence wherein the complex binds to the DNA sequence. According to one embodiment, the enzyme can be an RNA guided DNA g protein, such as an RNA guided DNA binding protein of a Type II CRISPR System that binds to the DNA and is guided by RNA. According to one embodiment, the RNA guided DNA binding n is a Cas9 protein.

This embodiment of the present disclosure may be referred to as co-localization of the RNA and DNA g protein to or with the double stranded DNA. In this manner, a DNA binding n-guide RNA complex may be used to cut multiple sites of the double stranded DNA so as to create a stem cell with multiple genetic modifications, such as multiple ions of exogenous donor DNA.

According to certain ments, a method of making multiple tions to target DNA in a stem cell expressing an enzyme that forms a co-localization complex with RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner is described including (a) introducing into the stem cell a first foreign nucleic acid encoding one or more RNAs complementary to the target DNA and which guide the enzyme to the target DNA, wherein the one or more RNAs and the enzyme are members of a co-localization complex for the target DNA, introducing into the stem cell a second foreign nucleic acid encoding one or more donor nucleic acid sequences, n the one or more RNAs and the one or more donor nucleic acid sequences are sed, n the one or more RNAs and the enzyme co-localize to the target DNA, the enzyme cleaves the target DNA and the donor nucleic acid is inserted into the target DNA to produce altered DNA in the stem cell, and repeating step (a) multiple times to produce multiple alterations to the DNA in the stem cell.

According to one embodiment, the RNA is between about 10 to about 500 nucleotides.

According to one embodiment, the RNA is between about 20 to about 100 nucleotides.

According to one embodiment, the one or more RNAs is a guide RNA. According to one embodiment, the one or more RNAs is a tracrRNA-crRNA fusion.

According to one embodiment, the DNA is genomic DNA, mitochondrial DNA, viral DNA, or exogenous DNA.

According to one embodiment, a cell may be genetically modified to reversibly include a nucleic acid encoding a DNA binding enzyme using a vector which can be easily d using an . Useful vectors methods are known to those of skill in the art and include irus, adeno associated virus, nuclease and integrase mediated tarteget insertion methods and transposon ed insertion methods. According to one embodiment, the nucleic acid encoding a DNA g enzyme that has been added, such as by using a cassette or vector can be removed in its entirety along with the cassette and vector and t leaving a portion of such nucleic acid, cassette or vector in the genomic DNA, for example. Such removal is referred to in the art as "scarless" removal, as the genome is the same as it was before on of the nucleic acid, cassette or . One exemplary embodiment for insertion and scarless removal is a PiggyBac vector commercially available from System Biosciences.

Further features and advantages of certain embodiments of the present invention will become more fully apparent in the following ption of embodiments and drawings thereof, and from the claims.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and other features and advantages of the t embodiments will be more fully understood from the ing detailed description of illustrative embodiments taken in conjunction with the accompanying drawings in which: Fig. 1 is directed to functional tests of re-TALENs in human somatic and stem cells. (a) Schematic representation of experimental design for testing genome targeting efficiency. A genomically integrated GFP coding sequence is ted by the insertion of a stop codon and a 68bp c fragment derived from the AAVS1 locus (bottom). Restoration of the GFP sequence by nuclease-mediated homologous recombination with tGFP donor (top) results in GFP+ cells that can be quantitated by FACS. ENs and TALENs target identical sequences within AAVS1 fragments. (b) Bar graph depicting GFP+ cell percentage introduced by tGFP donor alone, TALENs with tGFP donor, and ENs with tGFP donor at the target locus, as measured by FACS. (N=3, error bar =SD) Representative FACS plots are shown below. (c) Schematic overview ing the targeting strategy for the native AAVS1 locus. The donor plasmid, containing splicing acceptor (SA)- 2A (self-cleaving peptides), puromycin resistant gene (PURO) and GFP were described (see reference 10 hereby incorporated by reference in its ty.

The locations of PCR primers used to detect successful editing events are depicted as blue arrows. (d) Successfully targeted clones of PGP1 hiPSCs were selected with puromycin (0.5ug/mL) for 2 weeks. Microscopy images of three representative GFP+ clones are shown. Cells were also stained for the pluripotency markers TRA60. Scale bar: 200 µm. (e) PCR assays med on these the monoclonal GFP+ hiPSC clones demonstrated successful insertions of the donor cassettes at the AAVS1 site (lane 1,2,3), whereas plain hiPSCs show no evidence of successful insertion (lane C). (f) Depicts (SEQ ID NO:1).

Fig. 2 s to a comparison of reTALENs and Cas9-gRNAs genome targeting ency on CCR5 in iPSCs. (a) Schematic representation of genome engineering experimental design. At the re-TALEN pair or RNA targeting site, a 90mer ssODN carrying a 2bp mismatch against the c DNA was delivered along with the reTALEN or Cas9-gRNA constructs into PGP1 . The cutting sites of the nucleases are depicted as red arrows in the figure. (b) Deep sequencing analysis of HDR and NHEJ efficiencies for re-TALEN pairs (CCR5 #3) and ssODN, or the Cas9-gRNA and ssODN. Alterations in the genome of hiPSCs were analyzed from high-throughput sequence data by GEAS. Top: HDR was quantified from the fraction of reads that contained a 2bp point mutation built into the center of the ssODN (blue), and NHEJ activity was quantified from the on of deletions (grey)/Insertions (red) at each ic position in the genome. For the reTALEN and ssODN graphs, green dashed lines are plotted to mark the outer boundary of the re-TALEN pair’s binding sites, which are at positions -26bp and +26bp relative to the center of the two re-TALEN binding sites. For Cas9-gRNA and ssODN graphs, the green dashed lines mark the outer boundary of the gRNA ing site, which are at positions -20 and -1 bp relative to the PAM sequence. Bottom: Deletion/Insertion size bution in hiPSCs analyzed from the entire NHEJ population with treatments indicated above. (c) The genome editing efficiency of re-TALENs and Cas9-gRNAs targeting CCR5 in PGP1 hiPSCs.

Top: schematic entation of the targeted genome editing sites in CCR5. The 15 targeting sites are illustrated by blue arrows below. For each site, cells were co-transfected with a pair of re- TALENs and their corresponding ssODN donor carrying 2bp mismatches against the genomic DNA. Genome g efficiencies were assayed 6 days after transfection. Similarly, 15 Cas9- gRNAs were transfected with their ponding ssODNs individually into PGP1-hiPSCs to target the same 15 sites and analyzed the efficiency 6 days after transfection. Bottom: the genome editing efficiency of re-TALENs and Cas9-gRNAs targeting CCR5 in PGP1 hiPSCs. Panel 1 and 2 indicate NHEJ and HDR efficiencies mediated by Ns. Panel 3 and 4 indicate NHEJ and HDR efficiencies mediated by Cas9-gRNAs. NHEJ rates were calculated by the frequency of genomic alleles carrying deletions or insertions at the targeting region; HDR rates were calculated by the ncy of genomic alleles carrying 2bp mismatches. Panel 5, the DNaseI HS profile of a hiPSC cell line from ENCODE database (Duke DNase HS, iPS NIHi7 DS). Of note, the scales of different panels are different. (f) Sanger sequencing of the PCR amplicon from the three targeted hiPSC colonies confirmed that the expected DNA bases at the genome-insertion boundary is present. M: DNA . C: control with plain hiPSCs genomic DNA.

Fig. 3 is directed to a study of functional parameters governing ssODN-mediated HDR with re-TALENs ir RNAs in PGP1 hiPSCs. (a) PGP1 hiPSCs were co-transfected with re-TALENs pair (#3) and ssODNs of different lengths (50, 70, 90,110, 130,150,170 nts). All ssODNs possessed an identical 2bp mismatch against the genomic DNA in the middle of their sequence. A 90mer ssODN achieved optimal HDR in the targeted genome. The assessment of HDR, NHEJ-incurred deletion and ion ency is as described herein. (b) 90mer ssODNs corresponding to re-TALEN pair #3 each containing a 2bp mismatch (A) in the center and an additional 2bp mismatch (B) at different positions offset from A (where offsets varied from -30bp30bp) were used to test the effects of deviations from homology along the ssODN. Genome editing efficiency of each ssODN was assessed in PGP1 hiPSCs. The bottom bar graph shows the incorporation frequency of A only, B only, and A + B in the ed genome.

HDR rates decrease as the distance of homology deviations from the center increase. (c) ssODNs targeted to sites with varying distances (-620bp~ 480bp) away from the target site of re-TALEN pair #3 were tested to assess the maximum distance within which ssODNs can be placed to uce mutations. All ssODNs carried a 2bp mismatch in the middle of their ces.

Minimal HDR efficiency (<=0.06%) was observed when the ssODN mismatch was positioned 40bp away from the middle of EN pair’s binding site. (d) PGP1 hiPSCs were co-transfected with Cas9-gRNA (AAVS1) and ssODNs of different orientation (Oc: complement to gRNA; On: mplement to gRNA) and different lengths (30, 50, 70, 90, 110 nt). All ssODNs possessed an identical 2bp mismatch against the genomic DNA in the middle of their ce. A 70mer Oc ed optimal HDR in the targeted genome.

Fig. 4 is directed to using re-TALENs and ssODNs to obtain monoclonal genome edited hiPSC without selection. (a) Timeline of the experiment. (b) Genome ering efficiency of re-TALENs pair and ssODN (#3) assessed by the NGS platform described in Figure 2b. (c) Sanger sequencing results of monoclonal hiPSC colonies after genome editing. The 2bp heterogeneous pe (CT/CTTA/CT) was successfully introduced into the genome of PGP1- iPS11, PS13 colonies. (d) Immunofluorescence staining of targeted PS11. Cells were stained for the pluripotency markers Tra60 and SSEA4. (e) Hematoxylin and eosin staining of teratoma ns generated from monoclonal PGP1-iPS 11 cells.

Fig. 5. Design of reTALE. (a) Sequence alignment of the original TALE RVD monomer with rs in re-TALE-16.5 (re-TALE-M1re-TALE-M17) (SEQ ID NO:222) and (SEQ ID NOs 2-19). Nucleotide alterations from the original sequence are highlighted in gray. (b) Test of repetitiveness of re-TALE by PCR. Top panel illustrates the structure of re-TALE/TALE and positions of the primers in the PCR reaction. Bottom panel rates PCR bands with condition indicated below. The PCR laddering presents with the original TALE template (right lane).

Fig. 6. Design and practice of TALE Single-incubation Assembly (TASA) assembly. (a) Schematic representation of the library of E dimer blocks for TASA assembly. There is a library of 10 E dimer blocks encoding two RVDs. Within each block, all 16 dimers share the same DNA ce except the RVD encoding sequences; Dimers in different blocks have distinct sequences but are designed such that they share 32bp ps with the adjacent blocks.

DNA and amino acid sequence of one dimer (Block6_AC) are listed on the right. (SEQ ID Nos:223-224) (b) Schematic entation of TASA assembly. The left panel illustrates the TASA assembly method: a one-pot incubation reaction is conducted with an enzyme mixture/re-TALE blocks/re- TALE-N/TF backbone vectors. The reaction product can be used directly for bacterial transformation. The right panel rates the mechanism of TASA. The destination vector is linearized by an endonuclease at 37°C to cut off ccdB counter-selection cassette; the exonuclease, which processes the end of blocks and linearized vectors, exposes ssDNA overhangs at the end of fragments to allow blocks and vector backbones to anneal in a designated order. When the temperature rises up to 50°C, polymerases and ligases work together to seal the gap, producing the final constructs ready for transformation. (c) TASA assembly efficiency for Es possessing different monomer lengths. The blocks used for ly are illustrated on the left and the assembly efficiency is presented on the right.

Fig. 7. The functionality and sequence integrity of Lenti-reTALEs.

Fig 8. The sensitivity and reproducibility of GEAS.

(A) Information-based analysis of HDR detection limit. Given the t of re-TALENs (#10)/ssODN, the reads containing the expected g (HDR) were identified and these HDR reads were systematically removed to generate different artificial datasets with a "diluted" editing signal. Datasets with 100, 99.8, 99.9, 98.9, 97.8, 89.2, 78.4, 64.9, 21.6, 10.8, 2.2, 1.1, 0.2, 0.1, 0.02, and 0% removal of HDR reads were generated to generate artificial datasets with HR efficiency ranging from 0~0.67%. For each individual dataset, mutual ation (MI) of the background signal (in purple) and the signal obtained in the targeting site (in green) was estimated. MI at the ing site is remarkably higher than the background when the HDR efficiency is above %. A limit of HDR detection between 0.0014% and 0.0071% was estimated. MI calculation is described .

(B) The test of reproducibility of genome editing assessment system. The pairs of plots (Top and ) show the HDR and NHEJ assessment s of two ates with re-TALENs pair and cell type indicated above. For each experiment, nucleofection, targeted genome amplification, deep-sequencing and data analysis were ted independently. The genome editing assessment ion of replicates was calculated as √2 (|HDR1-HDR2|)/((HDR+HDR2)/2) =ΔHDR/HDR and √2 (|NHEJ1-NHEJ2|) /((NHEJ1+NHEJ2)/2) =ΔNHEJ/NHEJ and the variation results are listed below the plots. The average variation of the system was (19%+11%+4%+9%+10%+35%)/6=15%.

Factors that may contribute to the variations include the status of cells under nucleofection, nucleofection efficiency, and sequencing coverage and quality.

Fig. 9. Statistical analysis of NHEJ and HDR efficiencies by reTALENs and Cas9- gRNAs on CCR5. (a) The correlation of HR and NHEJ efficiencies ed by reTALENs at identical sites in iPSCs (r=0.91, P< 1X 10-5). (b) The correlation of HR and NHEJ efficiencies mediated by Cas9-gRNA at identical sites in iPSCs 4, P=0.002). (c) The correlation of NHEJ efficiencies mediated by Cas9-gRNA and the Tm temperature of gRNA targeting site in iPSCs (r=0.52, P=0.04) Fig. 10. The correlation analysis of genome editing efficiency and etic state.

Pearson correlation was used to study possible associations between DNase I sensitivity and genome engineering efficiencies (HR, NHEJ). The observed correlation was compared to a randomized set (N=100000). Observed correlations higher than the 95th percentile, or lower than the 5th percentile of the simulated distribution were considered as potential associations. No remarkable correlation n DNase1 sensitiivty and NHEJ/HR efficiencies was observed.

Fig. 11. The impact of homology pairing in the ssODN-mediated genome editing. (a) In the experiment described in Figure 3b, overall HDR as measured by the rate at which the middle 2b mismatch (A) was incorporated decreased as the secondary mismatches B increased their distance from the A (relative position of B to A varies from -3030bp). The higher rates of oration when B is only 10bp away from A (-10bp and +10b) may reflect a lesser need for pairing of the ssODN against genomic DNA proximal to the dsDNA break. (b) Distribution of gene conversion lengths along the ssODN. At each distance of B from A, a fraction of HDR events incorporates only A while another fraction incorporates both A and B.

These two events may be interpretable in terms of gene conversion tracts (Elliott et al., 1998), whereby A+B events represent long conversion tracts that extend beyond B and A-only events represent shorter ones that do not reach to B. Under this interpretation, a distribution of gene conversion lengths in both directions along the oligo can be estimated (the middle of ssODN is defined as 0, conversion tracks towards the 5’ end of ssODN as - direction, and 3’ end as + direction). Gene conversion tracts progressively decrease in nce as their lengths increase, a result very similar to gene conversion tract distributions seen with dsDNA donors, but on a highly compressed distance scale of tens of bp for the ssDNA oligo vs. hundreds of bases for dsDNA donors. (c) Assays for gene conversion tracts using a single ssODN that contains a series of mutations and measuring contiguous series of orations. A ssODN donor with three pairs of 2bp mismatches (orange) spaced at intervals of 10nt on either side of the l 2bp mismatch (Top) was used. Few genomic sequencing reads were detected (see nce 62 hereby orated by reference in its entirety) carrying >=1 mismatches defined by ssODN among >300,000 reads sequencing this region. All these reads were plotted (bottom) and the sequence of the reads was color coded.

Orange: defined mismatches; green: wild type sequence. Genome editing with this ssODN gave rise to a pattern in which middle mutation alone was incorporated 85% (53/62) of the time, with multiple B mismatches incorporated at other times. Although s of B oration events were too low to estimate a distribution of tract lengths > 10bp, it is clear that the short tract region from 10bp predominates.

Fig. 12. Cas9-gRNA nuclease and nickases genome editing efficiencies.

PGP1 iPSCs were co-transfected with combination of nuclease (C2) (Cas9-gRNA) or nickase (Cc) (Cas9D10A-gRNA) and ssODNs of different orientation (Oc and On). All ssODNs possessed an identical 2bp mismatch against the genomic DNA in the middle of their sequence. The ment of HDR is bed herein.

Fig. 13. The design and optimization of re-TALE sequence.

The E sequence was evolved in l design cycles to eliminate repeats. In each cycle, synonymous sequences from each repeat are evaluated. Those with the largest g distance to the ng DNA are selected. The final sequence with cai = 0.59 ΔG= -9.8 ol. An R package was provided to carry out this general framework for synthetic protein .

Fig. 14 is a gel image showing PCR tion of the genomic insertion of Cas 9 in PGP1 cells. Line 3, 6, 9, 12 are PCR t of plain PGP1 cell lines.

Fig. 15 is a graph of the mRNA expression level of Cas9 mRNA under the induction.

Fig. 16 is a graph showing genome targeting efficiency by different RNA designs.

Fig. 17 is a graph showing genome targeting efficiency of 44% gous recombination achieved by a guide RNA – donor DNA fusion.

Fig. 18 is a diagram g the genotype of isogenic PGP1 cell lines generated by system decribed herein. PGP1-iPS-BTHH has the single nucleotides deletion phenotype as the BTHH patient. PGP1-NHEJ has 4bp deletions that generated frame-shift mutations in a different way.

Fig. 19 is a graph showing that cardiomyocyte derived from isogenic PGP1 iPS recapitulated defective ATP production and F1F0 ATPase specific activity as demonstrated in patient specific cells.

Fig. 20A-20F depicts re-TALEN-backbone sequence (SEQ ID NOs:20-21).

DETAILED PTION The present disclosure is ed to the use of a TALEN that lacks certain repeat sequences, for nucleic acid ering, for example by cutting double stranded nucleic acid. The use of the TALEN to cut double stranded nucleic acid can result in ologous end joining (NHEJ) or homologous recombination (HR). Embodiments of the present disclosure also contemplate the use of a TALEN that lacks repeat sequences for nucleic acid engineering, for example by cutting double stranded nucleic acid, in the presence of a donor nucleic acid and insertion of the donor nucleic acid into the double stranded nucleic acid, such as by nonhomologous end joining (NHEJ) or homologous recombination (HR).

Transcription activator-like effector nucleases (TALENs) are known in the art and include artificial restriction s generated by fusing a TAL effector DNA binding domain to a DNA cleavage domain. Restriction enzymes are enzymes that cut DNA strands at a specific sequence. ription tor-like effectors (TALEs) can be ered to bind to a desired DNA sequence. See Boch, Jens (February 2011). "TALEs of genome targeting". Nature Biotechnology 29 (2): 135–6 hereby incorporated by reference in its entirety. By combining such an engineered TALE with a DNA cleavage domain (which cuts DNA strands), a TALEN is produced which is a restriction enzyme that is specific for any desired DNA sequence. According to certain embodiments, the TALEN is introduced into a cell for target nucleic acid editing in situ, such as genome editing in situ.

According to one embodiment, the ecific DNA cleavage domain from the end of the FokI endonuclease can be used to construct hybrid nucleases that are active in yeast cells, plant cells and animal cells. The FokI domain functions as a dimer, requiring two constructs with unique DNA binding domains for sites in the target genome with proper orientation and spacing. Both the number of amino acid residues between the TALE DNA binding domain and the FokI cleavage domain and the number of bases between the two individual TALEN binding sites affect activity.

The relationship n amino acid ce and DNA recognition of the TALE binding domain allows for designable ns. Software ms such as DNAWorks can be used to design TALE constructs. Other methods of ing TALE constructs are known to those of skill in the art. See Cermak, T.; Doyle, E. L.; Christian, M.; Wang, L.; Zhang, Y.; Schmidt, C.; Baller, J. A.; Somia, N. V. et al. (2011). "Efficient design and assembly of custom TALEN and other TAL effector-based constructs for DNA targeting". Nucleic Acids Research. doi:10.1093/nar/gkr218; Zhang, Feng; et.al. (February 2011). "Efficient construction of sequence-specific TAL effectors for modulating mammalian transcription", Nature hnology 29 (2): 149–53; Morbitzer, R.; Elsaesser, J.; Hausner, J.; Lahaye, T. . "Assembly of custom TALE-type DNA binding domains by modular cloning". Nucleic Acids Research. ’1093/nar/gkr151; Li, T.; Huang, S.; Zhao, X.; Wright, D. A.; ter, S.; Spalding, M. H.; Weeks, D. P.; Yang, B. (2011).

"Modularly led designer TAL effector nucleases for targeted gene knockout and gene replacement in eukaryotes". Nucleic Acids Research. doi"10.1093/nar/gkr188; Geiβler, R.; Scholze, H.; Hahn, S.; Streubel, J.; Bonas, U.; Behrens, S. E.; Boch, J. . "Transcriptional Activators of Human Genes with Programmable DNA-Specificity". In Shiu, Shin-Han. PLoS ONE 6 (5): e19509; Weber, E.; Gruetzner, R.; Werner, S.; Engler, C.; Marillonnet, S. (2011).

"Assembly of Designer TAL Effectors by Golden Gate Cloning". In Bendahmane, Mohammed.

PLoS ONE 6 (5): e19722 hereby orated by reference in their entireties.

According to an exemplary embodiment, once the TALEN genes have been assembled they may inserted into plasmids according to certain embodiments; the plasmids are then used to transfect the target cell where the gene ts are expressed and enter the nucleus to access the genome. According to exemplary embodiments, TALENs as described herein can be used to edit target nucleic acids, such as genomes, by inducing double-strand breaks (DSB), which cells respond to with repair mechanisms. Exemplary repair mechanisms include non-homologous end joining (NHEJ) which reconnects DNA from either side of a double-strand break where there is very little or no sequence overlap for annealing. This repair mechanism induces errors in the genome via insertion or deletion (indels), or somal rearrangement; any such errors may render the gene products coded at that location non-functional. See Miller, Jeffrey; et.al. (February 2011). "A TALE nuclease architecture for efficient genome editing". Nature Biotechnology 29 (2): 143–8 hereby incorporated by reference in its ty. Because this activity can vary ing on the species, cell type, target gene, and nuclease used, the activity can be monitored by using a heteroduplex cleavage assay which detects any difference between two alleles ied by PCR.

Cleavage products can be visualized on simple agarose gels or slab gel systems.

Alternatively, DNA can be introduced into a genome through NHEJ in the presence of exogenous double-stranded DNA fragments. Homology directed repair can also introduce foreign DNA at the DSB as the transfected double-stranded ces are used as templates for the repair enzymes. According to certain embodiments the TALENs described herein can be used to generate stably modified human embryonic stem cell and induced pluripotent stem cell (IPSCs) clones. According to certain embodiments the TALENs described herein can be used to generate knockout species such as C. elegans, knockout rats, knockout mice or ut zebrafish. ing to one embodiment of the present disclosure, embodiments are directed to the use of exogenous DNA, nuclease enzymes such as DNA binding ns and guide RNAs to colocalize to DNA within a stem cell and digest or cut the DNA with ion of the exogenous DNA. Such DNA binding proteins are readily known to those of skill in the art to bind to DNA for various purposes. Such DNA binding ns may be naturally occurring. DNA binding proteins included within the scope of the present disclosure include those which may be guided by RNA, referred to herein as guide RNA. According to this embodiment, the guide RNA and the RNA guided DNA binding protein form a co-localization complex at the DNA. Such DNA binding proteins having nuclease activity are known to those of skill in the art, and include naturally occurring DNA binding proteins having nuclease activity, such as Cas9 proteins present, for example, in Type II CRISPR s. Such Cas9 proteins and Type II CRISPR systems are well documented in the art. See Makarova et al., Nature Reviews, Microbiology, Vol. 9, June 2011, pp. 467-477 including all supplementary information hereby incorporated by reference in its entirety.

Exemplary DNA binding proteins having nuclease activity function to nick or cut double ed DNA. Such nuclease activity may result from the DNA binding n having one or more polypeptide sequences exhibiting nuclease ty. Such exemplary DNA binding ns may have two separate nuclease domains with each domain responsible for cutting or nicking a particular strand of the double stranded DNA. Exemplary polypeptide sequences having se activity known to those of skill in the art include the McrA-HNH nuclease related domain and the RuvC-like nuclease domain. Accordingly, exemplary DNA binding proteins are those that in nature contain one or more of the McrA-HNH nuclease related domain and the RuvC-like nuclease domain.

An exemplary DNA binding n is an RNA guided DNA binding protein of a Type II CRISPR System. An ary DNA binding protein is a Cas9 protein.

In S. pyogenes, Cas9 generates a blunt-ended double-stranded break 3bp upstream of the protospacer-adjacent motif (PAM) via a process mediated by two catalytic s in the n: an HNH domain that s the complementary strand of the DNA and a RuvC-like domain that cleaves the non-complementary strand. See Jinke et al., Science 337, 816-821 (2012) hereby incorporated by nce in its entirety. Cas9 proteins are known to exist in many Type II CRISPR systems including the following as identified in the mentary information to Makarova et al., Nature Reviews, Microbiology, Vol. 9, June 2011, pp. 467-477: Methanococcus maripaludis C7; Corynebacterium diphtheriae; Corynebacterium efficiens YS-314; Corynebacterium glutamicum ATCC 13032 Kitasato; Corynebacterium glutamicum ATCC 13032 eld; Corynebacterium glutamicum R; Corynebacterium kroppenstedtii DSM 44385; Mycobacterium abscessus ATCC 19977; Nocardia farcinica IFM10152; Rhodococcus erythropolis PR4; Rhodococcus jostii RHA1; Rhodococcus opacus B4 uid36573; hermus cellulolyticus 11B; Arthrobacter chlorophenolicus A6; Kribbella flavida DSM 17836 uid43465; Thermomonospora curvata DSM 43183; Bifidobacterium dentium Bd1; bacterium longum DJO10A; Slackia heliotrinireducens DSM 20476; Persephonella marina EX H1; Bacteroides fragilis NCTC 9434; Capnocytophaga ochracea DSM 7271; Flavobacterium psychrophilum JIP02 86; Akkermansia muciniphila ATCC BAA 835; Roseiflexus castenholzii DSM 13941; Roseiflexus RS1; Synechocystis PCC6803; Elusimicrobium minutum ; uncultured Termite group 1 bacterium phylotype Rs D17; Fibrobacter succinogenes S85; Bacillus cereus ATCC 10987; Listeria innocua;Lactobacillus casei; Lactobacillus sus GG; Lactobacillus rius UCC118; Streptococcus agalactiae A909; Streptococcus agalactiae NEM316; Streptococcus agalactiae 2603; Streptococcus dysgalactiae equisimilis GGS 124; Streptococcus equi zooepidemicus MGCS10565; Streptococcus gallolyticus UCN34 uid46061; ococcus gordonii Challis subst CH1; Streptococcus mutans NN2025 uid46353; Streptococcus mutans; Streptococcus pyogenes M1 GAS; Streptococcus pyogenes MGAS5005; Streptococcus pyogenes MGAS2096; Streptococcus pyogenes MGAS9429; Streptococcus pyogenes MGAS10270; Streptococcus pyogenes MGAS6180; Streptococcus pyogenes MGAS315; Streptococcus es SSI-1; Streptococcus pyogenes MGAS10750; Streptococcus es NZ131; Streptococcus thermophiles CNRZ1066; Streptococcus thermophiles LMD-9; ococcus thermophiles LMG 18311; Clostridium num A3 Loch Maree; Clostridium botulinum B Eklund 17B; Clostridium botulinum Ba4 657; Clostridium botulinum F Langeland; idium cellulolyticum H10; Finegoldia magna ATCC 29328; Eubacterium rectale ATCC 33656; Mycoplasma gallisepticum; Mycoplasma mobile 163K; Mycoplasma penetrans; Mycoplasma synoviae 53; Streptobacillus moniliformis DSM 12112; Bradyrhizobium BTAi1; Nitrobacter hamburgensis X14; Rhodopseudomonas palustris BisB18; seudomonas palustris BisB5; Parvibaculum lavamentivorans DS-1; Dinoroseobacter shibae DFL 12; acetobacter diazotrophicus Pal 5 FAPERJ; acetobacter diazotrophicus Pal 5 JGI; Azospirillum B510 uid46085; Rhodospirillum rubrum ATCC 11170; Diaphorobacter TPSY uid29975; Verminephrobacter eiseniae EF01-2; Neisseria meningitides 053442; Neisseria meningitides alpha14; Neisseria meningitides Z2491; Desulfovibrio salexigens DSM 2638; Campylobacter jejuni doylei 269 97; Campylobacter jejuni 81116; Campylobacter jejuni; Campylobacter lari RM2100; Helicobacter hepaticus; Wolinella succinogenes; Tolumonas s DSM 9187; Pseudoalteromonas atlantica T6c; ella pealeana ATCC 700345; Legionella pneumophila Paris; Actinobacillus succinogenes 130Z; Pasteurella multocida; Francisella tularensis novicida U112; Francisella tularensis tica; Francisella tularensis FSC 198; Francisella tularensis tularensis; Francisella nsis WY96-3418; and ema denticola ATCC 35405. Accordingly, ments of the present disclosure are directed to a Cas9 protein present in a Type II CRISPR system.

The Cas9 protein may be referred by one of skill in the art in the literature as Csn1. The S. pyogenes Cas9 protein is shown below. See eva et al., Nature 471, 602-607 (2011) hereby incorporated by reference in its entirety.

MDKKYSIGLDIGTNSVGWAVITDEYKVPSKKFKVLGNTDRHSIKKNLIGALLFDSGETAE ATRLKRTARRRYTRRKNRICYLQEIFSNEMAKVDDSFFHRLEESFLVEEDKKHERHPIFG NIVDEVAYHEKYPTIYHLRKKLVDSTDKADLRLIYLALAHMIKFRGHFLIEGDLNPDNSD VDKLFIQLVQTYNQLFEENPINASGVDAKAILSARLSKSRRLENLIAQLPGEKKNGLFGN LIALSLGLTPNFKSNFDLAEDAKLQLSKDTYDDDLDNLLAQIGDQYADLFLAAKNLSDAI LLSDILRVNTEITKAPLSASMIKRYDEHHQDLTLLKALVRQQLPEKYKEIFFDQSKNGYA GYIDGGASQEEFYKFIKPILEKMDGTEELLVKLNREDLLRKQRTFDNGSIPHQIHLGELH AILRRQEDFYPFLKDNREKIEKILTFRIPYYVGPLARGNSRFAWMTRKSEETITPWNFEE VVDKGASAQSFIERMTNFDKNLPNEKVLPKHSLLYEYFTVYNELTKVKYVTEGMRKPAFL SGEQKKAIVDLLFKTNRKVTVKQLKEDYFKKIECFDSVEISGVEDRFNASLGTYHDLLKI IKDKDFLDNEENEDILEDIVLTLTLFEDREMIEERLKTYAHLFDDKVMKQLKRRRYTGWG RLSRKLINGIRDKQSGKTILDFLKSDGFANRNFMQLIHDDSLTFKEDIQKAQVSGQGDSL HEHIANLAGSPAIKKGILQTVKVVDELVKVMGRHKPENIVIEMARENQTTQKGQKNSRER MKRIEEGIKELGSQILKEHPVENTQLQNEKLYLYYLQNGRDMYVDQELDINRLSDYDVDH LKDDSIDNKVLTRSDKNRGKSDNVPSEEVVKKMKNYWRQLLNAKLITQRKFDNL TKAERGGLSELDKAGFIKRQLVETRQITKHVAQILDSRMNTKYDENDKLIREVKVITLKS KLVSDFRKDFQFYKVREINNYHHAHDAYLNAVVGTALIKKYPKLESEFVYGDYKVYDVR QEIGKATAKYFFYSNIMNFFKTEITLANGEIRKRPLIETNGETGEIVWDKGRDF ATVRKVLSMPQVNIVKKTEVQTGGFSKESILPKRNSDKLIARKKDWDPKKYGGFDSPTVA AKVEKGKSKKLKSVKELLGITIMERSSFEKNPIDFLEAKGYKEVKKDLIIKLPK YSLFELENGRKRMLASAGELQKGNELALPSKYVNFLYLASHYEKLKGSPEDNEQKQLFVE QHKHYLDEIIEQISEFSKRVILADANLDKVLSAYNKHRDKPIREQAENIIHLFTLTNLGA PAAFKYFDTTIDRKRYTSTKEVLDATLIHQSITGLYETRIDLSQLGGD- (SEQ ID NO:22) According to one embodiment, the RNA guided DNA g protein es homologs and orthologs of Cas9 which retain the y of the protein to bind to the DNA, be guided by the RNA and cut the DNA. According to one embodiment, the Cas9 protein includes the sequence as set forth for naturally occurring Cas9 from S. pyogenes and protein sequences having at least 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%, 98% or 99% homology thereto and being a DNA binding protein, such as an RNA guided DNA binding protein.

According to one embodiment, an engineered Cas9-gRNA system is described which enables RNA-guided genome cutting in a site specific manner in a stem cell, if desired, and modification of the stem cell genome by ion of exogenous donor nucleic acids. The guide RNAs are complementary to target sites or target loci on the DNA. The guide RNAs can be crRNA-tracrRNA chimeras. The guide RNAs can be introduced from media surrounding the cell.

In this manner a method of continuously modifying a cell is described to the extent that various guide RNAs are provided to surrounding media and with the uptake by the cell of the guide RNAs and with supplementation of the media with additional guide RNAs. mentation may be in a continuous manner. The Cas9 binds at or near target genomic DNA. The one or more guide RNAs bind at or near target c DNA. The Cas9 cuts the target genomic DNA and exogenous donor DNA is inserted into the DNA at the cut site.

Accordingly, methods are directed to the use of a guide RNA with a Cas9 protein and an ous donor nucleic acid to multiplex insertions of exogenous donor nucleic acids into DNA within a stem cell expressing Cas9 by cycling the insertion of nucleic acid ng the RNA (or providing RNA from the surrounding media) and exogenous donor nucleic acid, expressing the RNA (or uptaking the RNA), colocalizing the RNA, Cas9 and DNA in a manner to cut the DNA, and insertion of the exogenous donor nucleic acid. The method steps can be cycled in any desired number to result in any desired number of DNA modifications. Methods of the present disclosure are accordingly directed to editing target genes using the Cas9 proteins and guide RNAs described herein to provide multiplex genetic and epigenetic engineering of stem cells. r embodiments of the present disclosure are directed to the use of DNA binding proteins or systems (such as the modified TALENS or Cas9 described herein) in general for the multiplex insertion of exogenous donor nucleic acids into the DNA, such as genomic DNA, of a stem cell, such as a human stem cell. One of skill in the art will readily identify exemplary DNA binding s based on the present disclosure.

Cells according to the present disclosure unless otherwise specified e any cell into which foreign nucleic acids can be introduced and expressed as described herein. It is to be tood that the basic concepts of the present disclosure described herein are not limited by cell type. Cells according to the present disclosure include somatic cells, stem cells, eukaryotic cells, prokaryotic cells, animal cells, plant cells, fungal cells, archael cells, erial cells and the like.

Cells include otic cells such as yeast cells, plant cells, and animal cells. Particular cells include mammalian cells, such as human cells. r, cells include any in which it would be cial or desirable to modify DNA.

Target nucleic acids include any nucleic acid sequence to which a TALEN or RNA guided DNA binding protein having nuclease activity as described herein can be useful to nick or cut.

Target nucleic acids include any nucleic acid sequence to which a co-localization complex as described herein can be useful to nick or cut. Target nucleic acids include genes. For purposes of the present disclosure, DNA, such as double stranded DNA, can e the target nucleic acid and a co-localization complex can bind to or otherwise co-localize with the DNA or a TALEN can otherwise bind with the DNA at or adjacent or near the target nucleic acid and in a manner in which the co-localization complex or the TALEN may have a desired effect on the target nucleic acid. Such target nucleic acids can include endogenous (or naturally occurring) nucleic acids and exogenous (or foreign) nucleic acids. One of skill based on the present disclosure will readily be able to identify or design guide RNAs and Cas9 proteins which co-localize to a DNA or a TALEN which binds to a DNA, including a target nucleic acid. One of skill will further be able to identify transcriptional regulator proteins or domains, such as transcriptional tors or riptional repressors, which likewise co-localize to a DNA including a target nucleic acid. DNA includes genomic DNA, mitochondrial DNA, viral DNA or exogenous DNA. According to one embodiment, materials and s useful in the practice of the present disclosure e those described in Di Carlo, et al., Nucleic Acids Research, 2013, vol. 41, No. 7 4336-4343 hereby incorporated by reference in its entirety for all purposes including exemplary strains and media, plasmid construction, transformation of ds, electroporation of transcient gRNA cassette and donor nucleic acids, transformation of gRNA plasmid with donor DNA into Cas9-expressing cells, galactose induction of Cas9, identification of CRISPR-Cas targets in yeast genome, etc. onal references including ation, materials and methods useful to one of skill in carrying out the invention are provided in Mali,P., Yang,L., Esvelt,K.M., Aach,J., Guell,M., DiCarlo,J.E., Norville,J.E. and Church,G.M. (2013) ided human genome engineering via Cas9. Science, 10.1126fscience.1232033; Storici,F., Durham,C.L., Gordenin,D.A. and Resnick,M.A. (2003) Chromosomal site-specific double-strand breaks are efficiently targeted for repair by oligonucleotides in yeast. PNAS, 100, 14994-14999 and M., Chylinski,K., a,l., Hauer,M., Doudna,J.A. and Charpentier,E. (2012) A programmable dual-RNA-Guided DNA endonuclease in adaptive bacterial immunity. Science, 337, 816-821 each of which are hereby incorporated by reference in their entireties for all purposes. n nucleic acids (i.e. those which are not part of a cell’s natural nucleic acid ition) may be introduced into a cell using any method known to those skilled in the art for such introduction. Such s include transfection, transduction, viral transduction, microinjection, ction, nucleofection, nanoparticle bombardment, transformation, conjugation and the like. One of skill in the art will readily understand and adapt such methods using readily identifiable literature s.

Donor nucleic acids include any nucleic acid to be inserted into a nucleic acid ce as described herein.

The following examples are set forth as being representative of the present disclosure.

These examples are not to be construed as limiting the scope of the present disclosure as these and other equivalent embodiments will be apparent in view of the present disclosure, figures and accompanying claims.

EXAMPLE I Guide RNA Assembly 19bp of the selected target sequence (i.e. 5’-N19 of 5’-N19-NGG-3’) were incorporated into two complementary 100mer oligonucleotides (TTCTTGGCTTTATATATCTTGTGGAAAGGACGAAACACCGN19GTTTTAGAGCTAGAA ATAGCAAGTTAAAATAAGGCTAGTCC) (SEQ ID NO:23). Each 100mer oligonucleotide was suspended at 100mM in water, mixed with equal volume and annealed in thermocycle e (95°C, 5min; Ramp to 4°C, 0.1°C/sec). To prepare the destination vector, the gRNA cloning vector (Addgene plasmid ID 41824) was linearized using AfIII and the vector was purified. The (10ul) gRNA assembly reaction was carried out with 10ng annealed 100bp fragment, 100ng ation backbone, 1X Gibson assembly reaction mix (New d Biolabs) at 50°C for 30min. The reaction can be processed directly for bacterial transformation to colonize dual assemblies.

EXAMPLE II Re-Coded TALEs Design and Assembly re-TALEs were optimized at different levels to facilitate assembly, and improve sion. re-TALE DNA sequences were first co-optimized for a human codon-usage, and low mRNA folding energy at the 5’ end (GeneGA, Bioconductor). The obtained sequence was d through several cycles to eliminate repeats (direct or inverted) longer than 11 bp (See Fig. 12). In each cycle, synonymous ces for each repeat are ted. Those with the t hamming distance to the evolving DNA are selected. The sequence of one of re-TALE possessing 16.5 monomers as follows CTAACCCCTGAACAGGTAGTCGCTATAGCTTCAAATATCGGGGGCAAGCAAGCACTTG AGACCGTTCAACGACTCCTGCCAGTGCTCTGCCAAGCCCATGGATTGACTCCGGAGCA AGTCGTCGCGATCGCGAGCAACGGCGGGGGGAAGCAGGCGCTGGAAACTGTTCAGAG ACTGCTGCCTGTACTTTGTCAGGCGCATGGTCTCACCCCCGAACAGGTTGTCGCAATA GCAAGTAATATAGGCGGTAAGCAAGCCCTAGAGACTGTGCAACGCCTGCTCCCCGTGC TGTGTCAGGCTCACGGTCTGACACCTGAACAAGTTGTCGCGATAGCCAGTCACGACGG GGGAAAACAAGCTCTAGAAACGGTTCAAAGGTTGTTGCCCGTTCTGTGCCAAGCACAT GGGTTAACACCCGAACAAGTAGTAGCGATAGCGTCAAATAACGGGGGTAAACAGGCT TTGGAGACGGTACAGCGGTTATTGCCGGTCCTCTGCCAGGCCCACGGACTTACGCCAG AACAGGTGGTTGCAATTGCCTCCAACATCGGCGGGAAACAAGCGTTGGAAACTGTGC AGAGACTCCTTCCTGTTTTGTGTCAAGCCCACGGCTTGACGCCTGAGCAGGTTGTGGC CATCGCTAGCCACGACGGAGGGAAGCAGGCTCTTGAAACCGTACAGCGACTTCTCCCA GTTTTGTGCCAAGCTCACGGGCTAACCCCCGAGCAAGTAGTTGCCATAGCAAGCAACG GAGGAGGAAAACAGGCATTAGAAACAGTTCAGCGCTTGCTCCCGGTACTCTGTCAGG CACACGGTCTAACTCCGGAACAGGTCGTAGCCATTGCTTCCCATGATGGCGGCAAACA GGCGCTAGAGACAGTCCAGAGGCTCTTGCCTGTGTTATGCCAGGCACATGGCCTCACC CCGGAGCAGGTCGTTGCCATCGCCAGTAATATCGGCGGAAAGCAAGCTCTCGAAACA GTACAACGGCTGTTGCCAGTCCTATGTCAAGCTCATGGACTGACGCCCGAGCAGGTAG TGGCAATCGCATCTCACGATGGAGGTAAACAAGCACTCGAGACTGTCCAAAGATTGTT ACCCGTACTATGCCAAGCGCATGGTTTAACCCCAGAGCAAGTTGTGGCTATTGCATCT GGTGGCAAACAAGCCTTGGAGACAGTGCAACGATTACTGCCTGTCTTATGTC AGGCCCATGGCCTTACTCCTGAGCAAGTCGTAGCTATCGCCAGCAACATAGGTGGGAA ACAGGCCCTGGAAACCGTACAACGTCTCCTCCCAGTACTTTGTCAAGCACACGGGTTG ACACCGGAACAAGTGGTGGCGATTGCGTCCAACGGCGGAGGCAAGCAGGCACTGGAG ACCGTCCAACGGCTTCTTCCGGTTCTTTGCCAGGCTCATGGGCTCACGCCAGAGCAGG TGGTAGCAATAGCGTCGAACATCGGTGGTAAGCAAGCGCTTGAAACGGTCCAGCGTCT TCTGCCGGTGTTGTGCCAGGCGCACGGACTCACACCAGAACAAGTGGTTGCTATTGCT AGTAACAACGGTGGAAAGCAGGCCCTCGAGACGGTGCAGAGGTTACTTCCCGTCCTCT GTCAAGCGCACGGCCTCACTCCAGAGCAAGTGGTTGCGATCGCTTCAAACAATGGTGG AAGACCTGCCCTGGAA (SEQ ID NO:24) According to certain embodiments, TALEs may be used having at least 80% sequence ty, at least 85% sequence ty, at least 90% sequence identity, at least 95% sequence identity, at least 98% sequence identity, or at least 99% sequence identity to the above sequence.

One of skill will readily understand where the above sequence may vary while still ining the DNA binding activity of the TALE.

E dimer blocks encoding two RVDs (see Fig. 6A) were generated by two rounds of PCR under standard Kapa HIFI (KPAP) PCR conditions, in which the first round of PCR introduced the RVD coding sequence and the second round of PCR generated the entire dimer blocks with 36bp overlaps with the adjacent blocks. PCR products were purified using QIAquick 96 PCR Purification Kit (QIAGEN) and the concentrations were measured by Nano-drop. The primer and template sequences are listed in Table 1 and Table 2 below.

Table 1. re-TALE blocks sequences (SEQ ID Nos:25-34) GCGCTCACGGGAGCACCCCTCAACCTAACCCCTGAACAGGTA GTCGCTATAGCTTCANNNNNNGGGGGCAAGCAAGCACTTGAGACCGT block0 TCAACGACTCCTGCCAGTGCTCTGCCAAGCCCATGGATTGACTCCGGA GCAAGTCGTCGCGATCGCGAGCNNNNNNGGGGGGAAGCAGGCGCTGG AAACTGTTCAGAGACTGCTGCCTGTACTTTGTCAGGCGCATGGTCTC AGACTGCTGCCTGTACTTTGTCAGGCGCATGGTCTCACCCCCGAACAG GTTGTCGCAATAGCAAGTNNNNNNGGCGGTAAGCAAGCCCTAGAGAC TGTGCAACGCCTGCTCCCCGTGCTGTGTCAGGCTCACGGTCTGACACC block1 TGAACAAGTTGTCGCGATAGCCAGTNNNNNNGGGGGAAAACAAGCTC TAGAAACGGTTCAAAGGTTGTTGCCCGTTCTGTGCCAAGCACATGGGT TGCGCTCACGGGAGCACCCCTCAACCTCACCCCCGAACAGGTTGTCGC AATAGCAAGTNNNNNNGGCGGTAAGCAAGCCCTAGAGACTGTGCAAC block1' GCCTGCTCCCCGTGCTGTGTCAGGCTCACGGTCTGACACCTGAACAAG CGATAGCCAGTNNNNNNGGGGGAAAACAAGCTCTAGAAACG GTTCAAAGGTTGTTGCCCGTTCTGTGCCAAGCACATGGGTTA AGGTTGTTGCCCGTTCTGTGCCAAGCACATGGGTTAACACCCGAACAA GTAGTAGCGATAGCGTCANNNNNNGGGGGTAAACAGGCTTTGGAGAC GGTACAGCGGTTATTGCCGGTCCTCTGCCAGGCCCACGGACTTACGCC block2 AGAACAGGTGGTTGCAATTGCCTCCNNNNNNGGCGGGAAACAAGCGT TGGAAACTGTGCAGAGACTCCTTCCTGTTTTGTGTCAAGCCCACGGCTT GACGCCT AGACTCCTTCCTGTTTTGTGTCAAGCCCACGGCTTGACGCCTGAGCAG GTTGTGGCCATCGCTAGCNNNNNNGGAGGGAAGCAGGCTCTTGAAAC CGTACAGCGACTTCTCCCAGTTTTGTGCCAAGCTCACGGGCTAACCCC block3 CGAGCAAGTAGTTGCCATAGCAAGCNNNNNNGGAGGAAAACAGGCAT TAGAAACAGTTCAGCGCTTGCTCCCGGTACTCTGTCAGGCACACGGTC CTCCCGGTACTCTGTCAGGCACACGGTCTAACTCCGGAACAG GTCGTAGCCATTGCTTCCNNNNNNGGCGGCAAACAGGCGCTAGAGAC CGTCCAGAGGCTCTTGCCTGTGTTATGCCAGGCACATGGCCTCACCCC block4 GGAGCAGGTCGTTGCCATCGCCAGTNNNNNNGGCGGAAAGCAAGCTC CAGTACAACGGCTGTTGCCAGTCCTATGTCAAGCTCATGGAC CGGCTGTTGCCAGTCCTATGTCAAGCTCATGGACTGACGCCCGAGCAG GTAGTGGCAATCGCATCTNNNNNNGGAGGTAAACAAGCACTCGAGAC TGTCCAAAGATTGTTACCCGTACTATGCCAAGCGCATGGTTTAACCCC block5 AGAGCAAGTTGTGGCTATTGCATCTNNNNNNGGTGGCAAACAAGCCTT GGAGACCGTGCAACGATTACTGCCTGTCTTATGTCAGGCCCATGGCCT CGATTACTGCCTGTCTTATGTCAGGCCCATGGCCTTACTCCTGAGCAGG CTATCGCCAGCNNNNNNGGGGGCAAGCAAGCACTGGAAACA GTCCAGCGTTTGCTTCCAGTACTTTGTCAGGCGCATGGATTGACACCG block6 GAACAAGTGGTGGCTATAGCCTCANNNNNNGGAGGAAAGCAGGCGCT GGAAACCGTCCAACGTCTTTTACCGGTGCTTTGCCAGGCGCACGGGCT CGATTACTGCCTGTCTTATGTCAGGCCCATGGCCTTACTCCTGAGCAAG TCGTAGCTATCGCCAGCNNNNNNGGTGGGAAACAGGCCCTGGAAACC block6' GTACAACGTCTCCTCCCAGTACTTTGTCAAGCACACGGGTTGACACCG GAACAAGTGGTGGCGATTGCGTCCNNNNNNGGAGGCAAGCAGGCACT GGAGACCGTCCAACGGCTTCTTCCGGTTCTTTGCCAGGCTCATGGGCT CGGCTTCTTCCGGTTCTTTGCCAGGCTCATGGGCTCACGCCAGAGCAG GTGGTAGCAATAGCGTCGNNNNNNGGTGGTAAGCAAGCGCTTGAAAC GGTCCAGCGTCTTCTGCCGGTGTTGTGCCAGGCGCACGGACTCACACC block7 AGAACAAGTGGTTGCTATTGCTAGTNNNNNNGGTGGAAAGCAGGCCC CGGTGCAGAGGTTACTTCCCGTCCTCTGTCAAGCGCACGGCC Table 2. re-TALE blocks primer sequences (SEQ ID NOS:35-53) CGCAATGCGCTCACGGGAGCACCCCTCAACctAACCCCTGAACAGGT* block0-F A*G GAGACCATGCGCCTGACAAAGTACAGGCAGCAGTCTCTGAACAG*T* block0-R T block1'-F TGGCGCAATGCGCTCACGGGAGCACCCCTCA*A*C AGACTGCTGCCTGTACTTTGTCAGGCGCATGGTCTCACCCCCGAACA* block1-F G*G block1- R/block1'- R TAACCCATGTGCTTGGCACAGAACGGGCAACAACCTTTGAACCG*T*T block2-F AGGTTGTTGCCCGTTCTGTGCCAAGCACATGGGTTAACACCCgaac*a*a CAAGCCGTGGGCTTGACACAAAACAGGAAGGAGTCTCTGCA blcok2-R CAG*T*t block3-F AGACTCCTTCCTGTTTTGTGTCAAGCCCACGGCTTGACGCCTG*A*G block3-R TAGACCGTGTGCCTGACAGAGTACCGGGAGCAAGCGCT*G*A block4-F CGCTTGCTCCCGGTACTCTGTCAGGCACACGGTCTAA*C*T block4-R CAGTCCATGAGCTTGACATAGGACTGGCAACAGCCGTT*G*T block5-F CGGCTGTTGCCAGTCCTATGTCAAGCTCATGGACTGA*C*G block5-R ATGGGCCTGACATAAGACAGGCAGTAATCGTT*G*C block6-F CGATTACTGCCTGTCTTATGTCAGGCCCATGGCCTTA*C*T block6-R GTGCGCCTGGCAAAGCACCGGTAAAAGACGTTGGA*C*G CGATTACTGCCTGTCTTATGTCAGGCCCATGGCCTTACTCCTGAGCAA block6'-F *G*T block6'-R ATGAGCCTGGCAAAGAACCGGAAGAAGCCGTT*G*G CGGCTTCTTCCGGTTCTTTGCCAGGCTCATGGGCTCACGCCAGAGCAG block7-F G*T*G blcok7-R GAGGCCGTGCGCTTGACAGAGGACGGGAAGTAACCTCT*G*C re-TALENs and re-TALE-TF destination vectors were constructed by modifying the TALE-TF and TALEN g backbones (see reference 24 hereby incorporated by nce in its entirety). The 0.5 RVD regions on the vectors were re-coded and SapI cutting site was incorporated at the designated re-TALE cloning site. The sequences of re-TALENs and re-TALE-TF backbones are provided in Fig. 20. Plasmids can be eated with SapI (New England Biolabs) with manufacturer recommended conditions and purified with QIAquick PCR purification kit (QIAGEN).

A (10ul) one-pot TASA assembly reaction was carried out with 200ng of each block, 500ng destination backbone, 1X TASA enzyme mixture (2U SapI, 100U Ampligase (Epicentre), 10mU T5 exonuclease (Epicentre), 2.5U Phusion DNA polymerase (New England Biolabs)) and 1X rmal assembly reaction buffer as described before (see reference 25 hereby incorporated by reference in its ty) (5% PEG-8000, 100 mM Tris-HCl pH 7.5, 10 mM MgCl2, 10 mM DTT, 0.2 mM each of the four dNTPs and 1 mM NAD). Incubations were performed at 37°C for 5min and 50 °C for 30 min. TASA ly reaction can be processed directly for bacterial transformation to colonize individual assemblies. The efficiency of obtaining full length uct is ~20% with this approach. Alternatively, >90% ency can be achieved by a three-step ly. First, 10ul re-TALE assembly ons are performed with 200ng of each block, 1X re- TALE enzyme mixture (100U Ampligase, 12.5mU T5 exonuclease, 2.5U Phusion DNA polymerase) and 1X isothermal assembly buffer at 50°C for 30min, followed by standardized Kapa HIFI PCR reaction, agarose gel electrophoresis, and QIAquick Gel extraction (Qiagen) to enrich the full length re-TALEs. 200ng re-TALE amplicons can then be mixed with 500ng Sap1-pretreated destination backbone, 1X re-TALE assembly mixture and 1X isothermal assembly reaction buffer and incubated at 50 °C for 30 min. The re-TALE final assembly reaction can be processed directly for bacterial transformation to colonize dual assemblies. One of skill in the art will readily be able to select endonucleases, exonucleases, polymerases and ligases from among those known to practice the methods bed herein. For example, type IIs endonucleases can be used, such as: Fok 1, Bts I, Ear I, Sap I. Exonucleases which are titralable can be used, such as lamda exonuclease, T5 exonuclease and Exonuclease III. Non-hotstart polymerases can be used, such as phusion DNA polymerase, Taq DNA polymerase and VentR DNA polymerase. Thermostable ligases can be used in this on, such as ase, pfu DNA ligase, Taq DNA ligase. In addition, different reaction conditions can be used to activate such endonucleases, leases, polymerases and s ing on the particular species used.

EXAMPLE III Cell Line and Cell Culture PGP1 iPS cells were maintained on Matrigel (BD Biosciences)-coated plates in mTeSR1 (Stemcell Technologies). Cultures were passaged every 5–7 days with TrypLE Express (Invitrogen). 293T and 293FT cells were grown and maintained in Dulbecco’s modified Eagle’s medium (DMEM, Invitrogen) high glucose supplemented with 10% fetal bovine serum (FBS, Invitrogen), llin/streptomycin (pen/strep, Invitrogen), and non-essential amino acids (NEAA, Invitrogen). K562 cells were grown and maintained in RPMI (Invitrogen) supplemented with 10% fetal bovine serum (FBS, Invitrogen 15%) and penicillin/streptomycin (pen/strep, Invitrogen). All cells were maintained at 37°C and 5% CO2 in a humidified incubator.

A stable 293T cell line for detecting HDR ency was established as described in reference 26 hereby incorporated by reference in its entirety. Specifically, the reporter cell lines bear genomically integrated GFP coding sequences disrupted by the insertion of a stop codon and a 68bp genomic fragment derived from the AAVS1 locus.

EXAMPLE IV Test of re-TALENs Activity 293T er cells were seeded at densities of 2 × 105 cells per well in 24-well plate and ected them with 1μg of each re-TALENs plasmid and 2μg DNA donor plasmid using Lipofectamine 2000 following the manufacturer’s protocols. Cells were harvested using TrypLE Express (Invitrogen) ~18 h after transfection and resuspended in 200 µl of media for flow cytometry is using an LSRFortessa cell er (BD Biosciences). The flow cytometry data were analyzed using FlowJo (FlowJo). At least 25,000 events were analyzed for each transfection sample. For endogenous AAVS1 locus targeting experiment in 293T, the transfection procedures were identical as described above and puromycin selection was conducted with drug concentration at 3μg/ml 1 week after transfection.

EXAMPLE V Functional Lentivirus Generation Assessment The lentiviral vectors were created by standard PCR and g techniques. The lentiviral plasmids were transfected by Lipofectamine 2000 with iral Packaging Mix (Invitrogen) into cultured 293FT cells (Invitrogen) to produce lentivirus. Supernatant was collected 48 and 72h posttransfection , sterile filtered, and 100ul ed supernatant was added to 5 × 105 fresh 293T cells with polybrene. Lentivirus titration was calculated based on the following formula: virus titration = ntage of GFP+ 293T cell * l cell numbers under transduction) / (the volume of original virus collecting supernatant used in the transduction ment). To test the functionality of lentivirus, 3 days after transduction, lentivirus transduced 293T cells were transfected with 30 ng plasmids carrying y reporter and 500ng pUC19 plasmids using Lipofectamine 2000 (Invitrogen). Cell images were analyzed using Axio Observer Z.1 (Zeiss) 18 hours after transfection and harvested using TrypLE Express (Invitrogen) and resuspended in 200 µl of media for flow cytometry analysis using a LSRFortessa cell analyzer (BD Biosciences). The flow cytometry data were analyzed using BD FACSDiva (BD Biosciences).

EXAMPLE VI Test of re-TALENs and RNA genome editing efficiency PGP1 iPSCs were cultured in Rho kinase (ROCK) inhibitor Y-27632 (Calbiochem) 2h before nucleofection. Transfections were done using P3 Primary Cell 4D-Nucleofector X Kit (Lonza). Specifically, cells were harvested using TrypLE Express rogen) and 2×106 cells were resuspended in 20 μl nucleofection mixture containing 16.4 μl P3 Nucleofector solution, 3.6 μl supplement, 1μg of each ENs plasmid or 1ug Cas9 and 1ug gRNA construct, 2μl of 100 μM ssODN. Subsequently, the mixtures were transferred to 20µl Nucleocuvette strips and fection was conducted using CB150 program. Cells were plated on Matrigel-coated plates in mTeSR1 medium supplemented with ROCK inhibitor for the first 24 hrs. For endogenous AAVS1 locus targeting experiment with dsDNA donor, the same procedure was followed except 2 μg dsDNA donor was used and the mTeSR1 media was supplemented with puromycin at the concentration of 0.5ug/mL 1 week after transfection.

The ation of reTALENs, gRNA and ssODNs used in this example are listed in Table 3 and Table 4 below.

Table 3. ation of re-TALEN pairs/Cas9-gRNA ing CCR5 (SEQ ID Nos:54-160) re- re- gRA TAL TAL N ENs ENs target pair ing targe re-TALEN-L re-TALEN-R gRNA targeting target seque ting targeting sequence targeting sequence sequence ing pair nce site start (start) positi /chr3: target on (end) /chr3: 4640 4640 TCCCCACTTTCT TAACCACTCAG CACTTTCTTGTG 4640 9942 9993 TGTGAA GACAGGG AATCCTT 9946 4641 4641 TCACACAGCAA AGCAG AGCGG 4641 0227 0278 GTCAGCA GCTCGGA AGCAGGCT 0264 4641 4641 TACCCAGACGA TCAGACTGCCA ACCCAGACGAG 4641 1260 1311 GAAAGCT AGCTTGA AAAGCTGA 1261 4641 4641 TCTTGTGGCTC CAGCA AGAGGGCATCTT 4641 1464 1515 A GAGCTGA GTGGCTC 1456 4641 4641 TTGAGATTTTC GTCAT ATCAAGCTCTCT 4641 1517 1568 AGATGTC ATCAAGC TGGCGGT 1538 4641 4641 TTCAGATAGAT TGCCAGATACA GCTTCAGATAGA 4641 1634 1685 TATATCT TAGGTGG TTATATC 1632 4641 4641 TTATACTGTCT TCAGCTCTTCT ACGGATGTCTCA 4641 2396 2447 ATATGAT GGCCAGA GCTCTTC 2437 4641 4641 TGGCCAGAAGA TTACCGGGGAG CCGGGGAGAGT 4641 2432 2483 GCTGAGA AGTTTCT TTCTTGTA 2461 4641 4641 TTTGCAGAGAG TTAGCAGAAGA GAAATCTTATCT 4641 2750 2801 ATGAGTC TAAGATT A 2782 4641 4641 TATAAGACTAA TCGTCTGCCAC AATGCATGACAT 4641 3152 3203 ACTACCC CACAGAT TCATCTG 3172 4641 4641 TAAAACAGTTT TATAAAGTCCT AACAGTTTGCAT 4641 4305 4356 GCATTCA AGAATGT TCATGGA 4308 4641 4641 TGGCCATCTCT GCCCA CCAGAAGGGGA 4641 4608 4659 GACCTGT GAAGGGG CAGTAAGA 4632 4641 4641 TAGGTACCTGG TGACCGTCCTG CTGACAATCGAT 4641 4768 4820 CTGTCGT GCTTTTA AGGTACC 4757 4641 4641 TGTCATGGTCA TCGACACCGAA AAGCA 4641 5017 5068 TCTGCTA GCAGAGT GAGTTTTT 5046 4642 4642 TGCCCCCGCGA TCTGGAAGTTG GGAAGTTGAAC 4642 0034 0084 GGCCACA AACACCC ACCCTTGC 0062 Table 4. ssODN design for studying ssODN-mediated genome editing 90- CTACTGTCATTCAGGGCAATACCCAGACGAGAAAGCTGAGGGTAT *1 AACAGGTTTCAAGCTTGGCAGTCTGACTACAGAGGCCACTGGCTT ance 90- TCATTCAGCCCAATACCCTAACGAGAAAGCTGAGGGTATA bet *2 ACAGGTTTCAAGCTTGGCAGTCTGACTACAGAGGCCACTGGCTT n 90- CTACTGTCATTCAGCCCAATACCCAGACGAGAAAAGTGAGGGTATA the *3 ACAGGTTTCAAGCTTGGCAGTCTGACTACAGAGGCCACTGGCTT gu 90M- CTACTGTCATTCAGCCCAATACCCAGACGAGAAAGCTGAGGGTATA re 0 ACAGGTTTCAAGCTTGGCAGTCTGACTACAGAGGCCACTGGCTT mut 90- CTACTGTCATTCAGCCCAATACCCAGACGAGAAAGCTGAGGGTATA atio *4 ACAGGTTTGTAGCTTGGCAGTCTGACTACAGAGGCCACTGGCTT and 90- CTACTGTCATTCAGCCCAATACCCAGACGAGAAAGCTGAGGGTATA DS *5 ACAGGTTTCAAGCTTGGCTCTCTGACTACAGAGGCCACTGGCTT 90- CTACTGTCATTCAGCCCAATACCCAGACGAGAAAGCTGAGGGTATA *6 ACAGGTTTCAAGCTTGGCAGTCTGACTAGTGAGGCCACTGGCTT dist L670 CACTTTATATTTCCCTGCTTAAACAGTCCCCCGAGGGTGGGTGCGG Fi ance bp_9 AAAAGGCTCTACACTTGTTATCATTCCCTCTCCACCACAGGCAT gu bet 0M re wee L570 TTTGTATTTGGGTTTTTTTAAAACCTCCACTCTACAGTTAAGAATTC 3c n bp_9 TAAGGCACAGAGCTTCAATAATTTGGTCAGAGCCAAGTAGCAG ssO 0M DN L480 GGAGGTTAAACCCAGCAGCATGACTGCAGTTCTTAATCAATGCCCC and bp_9 TTGAATTGCACATATGGGATGAACTAGAACATTTTCTCGATGAT the 0M DS L394 CTCGATGATTCGCTGTCCTTGTTATGATTATGTTACTGAGCTCTACT B bp_9 GTAGCACAGACATATGTCCCTATATGGGGCGGGGGTGGGGGTG GGTGTCTTGATCGCTGGGCTATTTCTATACTGTTCTGGCTTTTCGGA AGCAGTCATTTCTTTCTATTCTCCAAGCACCAGCAATTAGCTT GCTTCTAGTTTGCTGAAACTAATCTGCTATAGACAGAGACTCCGAC GAACCAATTTTATTAGGATTTGATCAAATAAACTCTCTCTGACA GAAAGAGTAACTAAGAGTTTGATGTTTACTGAGTGCATAGTATGCA CTAGATGCTGGCCGTGGATGCCTCATAGAATCCTCCCAACAACT GCTAGATGCTGGCCGTGGATGCCTCATAGAATCCTCCCAACAACCG ATGAAATGACTACTGTCATTCAGCCCAATACCCAGACGAGAAAG ACAGGTTTCAAGCTTGGCAGTCTGACTACAGAGGCCACTGGCTTTA GGTTAGTCTGCCTCTGTAGGATTGGGGGCACGTAATTT TTAGTCTGCCTCTGTAGGATTGGGGGCACGTAATTTTGCTGTTTAAG GTCTCATTTGCCTTCTTAGAGATCACAAGCCAAAGCTTTTTAT GGAAGCCCAGAGGGCATCTTGTGGCTCGGGAGTAGCTCTCTGCTAC CTTCTCAGCTCTGCTGACAATACTTGAGATTTTCAGATGTCACC TCAGCTCTGCTGACAATACTTGAGATTTTCAGATGTCACCAACCAG CAAGAGAGCTTGATATGACTGTATATAGTATAGTCATAAAGAAC GAACCTGAACTTGACCATATACTTATGTCATGTGGAAATC TTCTCATAGCTTCAGATAGATTATATCTGGAGTGAAGAATCCTG R375 GTGGAAAATTTCTCATAGCTTCAGATAGATTATATCTGGAGTGAGC M_9 AATCCTGCCACCTATGTATCTGGCATAGTGTGAGTCCTCATAAA GGTTTGAAGGGCAACAAAATAGTGAACAGAGTGAAAATCCCCACC TAGATCCTGGGTCCAGAAAAAGATGGGAAACCTGTTTAGCTCACC ent- GGCCACTAGGGACAAAATTGGTGAcagaaa ent- CCCACAGTGGGGCCACTAGGGACAAAATTGGTGAcagaaaagccccatcc leng TCCCCTCCACCCCACAGTGGGGCCACTAGGGACAAAATTGGTGAcag entth aaaagccccatccttaggcctcc Fi ntati gu on cttTTATCTGTCCCCTCCACCCCACAGTGGGGCCACTAGGGACAAAAT entre for TGGTGAcagaaaagccccatccttaggcctcctccttcctag 3d Cas NA ggtacttTTATCTGTCCCCTCCACCCCACAGTGGGGCCACTAGGGA enttarg CAAAATTGGTGAcagaaaagccccatccttaggcctcctccttcctagtctcctgata Noncomp leme TTTCTGTCACCAATGGTGTCCCTAGTGGCC Noncomp leme GGCTTTTCTGTCACCAATGGTGTCCCTAGTGGCCCCACTG nt- TGGG Noncomp leme GGAGGCCTAAGGATGGGGCTTTTCTGTCACCAATGGTGTCCCTAGT nt- GGCCCCACTGTGGGGTGGAGGGGA Noncomp leme CTAGGAAGGAGGAGGCCTAAGGATGGGGCTTTTCTGTCACCAATG nt- GTGTCCCTAGTGGCCCCACTGTGGGGTGGAGGGGACAGATAAAAG Noncomp TATCAGGAGACTAGGAAGGAGGAGGCCTAAGGATGGGGCTTTTCT GTCACCAATGGTGTCCCTAGTGGCCCCACTGTGGGGTGGAGGGGAC AGATAAAAGTACCCAGAAC ssO Cas9 DN - don gRN TTCTAGTAACCACTCAGGACAGGGGGGTTCAGCCCAAAAATTCACA Fi or A- AGAAAGTGGGGACCCATGGGAAAT gu for CCR re Cas 5-1 2c 9- Cas9 gR - CAGCAAGTCAGCAGCACAGCGTGTGTGACTCCGAGGGTGCTCCGCT NA gRN AGCCCACATTGCCCTCTGGGGGTG targ A- etin CCR g 5-2 CC Cas9 R5 - gRN GTCAGACTGCCAAGCTTGAAACCTGTCTTACCCTCTACTTTCTCGTC A- TGGGTATTGGGCTGAATGACAGT gRN TGAGAAGACAGCAGAGAGCTACTCCCGAAGCACAAGATG A- CCCTCTGGGCTTCCGTGACCTTGGC gRN CTGACAATACTTGAGATTTTCAGATGTCACCAACGACCAAGAGAGC A- TTGATATGACTGTATATAGTATAG gRN CAGATACATAGGTGGCAGGATTCTTCACTCCAGACTTAATCTATCT A- GAAGCTATGAGAAATTTTCCACAT gRN TATATGATTGATTTGCACAGCTCATCTGGCCAGATAAGCTGAGACA A- TCCGTTCCCCTACAAGAAACTCTC ATCTGGCCAGAAGAGCTGAGACATCCGTTCCCCTTGAAGAAACTCT CCCCGGTAAGTAACCTCTCAGCTG gRN AGGCATCTCACTGGAGAGGGTTTAGTTCTCCTTAAGAGAAGATAAG A- ATTTCAAGAGGGAAGCTAAGACTC gRN ATAATATAATAAAAAATGTTTCGTCTGCCACCACTAATGAATGTCA A- TGCATTCTGGGTAGTTTAGTCTTA gRN TTTATAAAGTCCTAGAATGTATTTAGTTGCCCTCGTTGAATGCAAAC A- TGTTTTATACATCAATAGGTTTT gRN GCTCAACCTGGCCATCTCTGACCTGTTTTTCCTTCCCACTGTCCCCT A- TCTGGGCTCACTATGCTGCCGCC gRN TTTTAAAGCAAACACAGCATGGACGACAGCCAGGCTCCTATCGATT A- AGGATGATGAAGAAGATT Cas9 GCTTGTCATGGTCATCTGCTACTCGGGAATCCTAATTACTCTGCTTC - GGTGTCGAAATGAGAAGAAGAGG gRN ATACTGCCCCCGCGAGGCCACATTGGCAAACCAGCTTGGGTGTTCA A- ACTTCCAGACTTGGCCATGGAGAA LEN- CTGAAGAATTTCCCATGGGTCCCCACTTTCTTGTGAATCCTTGGAGT CCR GAACCCCCCTGTCCTGAGTGGTTACTAGAACACACCTCTGGAC LEN- TGGAAGTATCTTGCCGAGGTCACACAGCAAGTCAGCAGCACAGCC CCR AGTGTGACTCCGAGCCTGCTCCGCTAGCCCACATTGCCCTCTGGG LEN- CTACTGTCATTCAGCCCAATACCCAGACGAGAAAGCTGAGGGTATA CCR ACAGGTTTCAAGCTTGGCAGTCTGACTACAGAGGCCACTGGCTT LEN- GGAAGCCCAGAGGGCATCTTGTGGCTCGGGAGTAGCTCTCTGCTAC CCR CTTCTCAGCTCTGCTGACAATACTTGAGATTTTCAGATGTCACC LEN- CTGCTGACAATACTTGAGATTTTCAGATGTCACCAACGCC CCR CAAGAGAGCTTGATATGACTGTATATAGTATAGTCATAAAGAAC LEN- GTGGAAAATTTCTCATAGCTTCAGATAGATTATATCTGGAGTGAGC CCR AATCCTGCCACCTATGTATCTGGCATAGTGTGAGTCCTCATAAA LEN- GAAACAGCATTTCCTACTTTTATACTGTCTATATGATTGATTTGGTC CCR AGCTCATCTGGCCAGAAGAGCTGAGACATCCGTTCCCCTACAA LEN- TTGATTTGCACAGCTCATCTGGCCAGAAGAGCTGAGACATCCGTAT CCR CCCTACAAGAAACTCTCCCCGGTAAGTAACCTCTCAGCTGCTTG LEN- GGAGAGGGTTTAGTTCTCCTTAGCAGAAGATAAGATTTCAAGATGA CCR GAGCTAAGACTCATCTCTCTGCAAATCTTTCTTTTGAGAGGTAA LEN- TAATATAATAAAAAATGTTTCGTCTGCCACCACAGATGAATGTCGA CCR GCATTCTGGGTAGTTTAGTCTTATAACCAGCTGTCTTGCCTAGT LEN- TTAAAAACCTATTGATGTATAAAACAGTTTGCATTCATGGAGGGTG CCR ACTAAATACATTCTAGGACTTTATAAAAGATCACTTTTTATTTA LEN- GACATCTACCTGCTCAACCTGGCCATCTCTGACCTGTTTTTCCTATT CCR TACTGTCCCCTTCTGGGCTCACTATGCTGCCGCCCAGTGGGAC LEN- TCATCCTCCTGACAATCGATAGGTACCTGGCTGTCGTCCATGCTAC CCR GTTTGCTTTAAAAGCCAGGACGGTCACCTTTGGGGTGGTGACAA LEN- TCCTGCCGCTGCTTGTCATGGTCATCTGCTACTCGGGAGA CCR CCTAAAAACTCTGCTTCGGTGTCGAAATGAGAAGAAGAGGCACA GGCAAGCCTTGGGTCATACTGCCCCCGCGAGGCCACATTGGCAAGT LENCAGCAAGGGTGTTCAACTTCCAGACTTGGCCATGGAGAAGACAT EXAMPLE VII Amplicon Library Preparation of the ing Regions Cells were harvested 6 days after nucleofection and 0.1 μl prepGEM tissue protease enzyme (ZyGEM) and 1 μl M gold buffer (ZyGEM) were added to 8.9 µl of the 2~5 X 105 cells in the medium. 1ul of the reactions were then added to 9 µl of PCR mix containing 5ul 2X KAPA Hifi Hotstart Readymix (KAPA Biosystems) and 100nM corresponding amplification primer pairs. Reactions were incubated at 95°C for 5 min ed by 15 cycles of 98°C, 20 s; 65°C, 20 s and 72°C, 20 s. To add the Illumina sequence adaptor used, 5 µl reaction products were then added to 20 µl of PCR mix containing 12.5 µl 2X KAPA HIFI Hotstart Readymix (KAPA Biosystems) and 200 nM primers carrying Illumina sequence adaptors. Reactions were incubated at 95°C for 5min followed by 25 cycles of 98°C, 20s; 65°C, 20s and 72°C, 20s. PCR products were purified by QIAquick PCR purification kit, mixed at roughly the same concentration, and sequenced with MiSeq Personal Sequencer. The PCR primers are listed in Table 5 below.

Table 5. CCR5 targeting site PCR primer sequences (SEQ ID Nos:161-221) targeting name primer ce in CCR5 ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATTTT site1-F1 GCAGTGTGCGTTACTCC ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGTTT site1-F2 GCAGTGTGCGTTACTCC TTTCCCTACACGACGCTCTTCCGATCTGCCTAATTT site1-F3 GCAGTGTGCGTTACTCC TTTCCCTACACGACGCTCTTCCGATCTTGGTCATTT site1-F4 GCAGTGTGCGTTACTCC CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTCCAAGCAA site1-R CTAAGTCACAGCA ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATATG F1 AGGAAATGGAAGCTTG 2 ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGAT Site2-F2 GAGGAAATGGAAGCTTG Site2-F3 ACACTCTTTCCCTACACGACGCTCTTCCGATCTGCCTAAAT GAGGAAATGGAAGCTTG ACACTCTTTCCCTACACGACGCTCTTCCGATCTTGGTCAATG Site2-F4 AGGAAATGGAAGCTTG CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTCATTAGGG Site2-R TATTGGAGGA ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATAAT site3-F1 CCTCCCAACAACTCAT ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGAA site3-F2 TCCTCCCAACAACTCAT ACACTCTTTCCCTACACGACGCTCTTCCGATCTGCCTAAAA site3-F3 TCCTCCCAACAACTCAT ACACTCTTTCCCTACACGACGCTCTTCCGATCTTGGTCAAAT F4 CCTCCCAACAACTCAT CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTCCCAATCCT site3_R ACAGAGGCAG ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATAA site4-F1 GCCAAAGCTTTTTATTC ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGAA site4-F2 GCCAAAGCTTTTTATTC ACACTCTTTCCCTACACGACGCTCTTCCGATCTGCCTAAAA site4-F3 GCCAAAGCTTTTTATTC ACACTCTTTCCCTACACGACGCTCTTCCGATCTTGGTCAAA F4 GCCAAAGCTTTTTATTC ACACTCTTTCCCTACACGACGCTCTTCCGATCTAAGCCAAA R GCTTTTTATTCT ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATATC site5-F1 TTGTGGCTCGGGAGTAG ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGATC site5-F2 TTGTGGCTCGGGAGTAG CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTTGGCAGGA site5-R TTCTTCACTCCA TTTCCCTACACGACGCTCTTCCGATCTCGTGATCTA site6-F1 TTTTGTTGCCCTTCAAA ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGCTA site6-F2 TTTTGTTGCCCTTCAAA CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTAACCTGAA site6-R CTTGACCATATACT ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATCA site7-F1 GCTGAGAGGTTACTTACC TTTCCCTACACGACGCTCTTCCGATCTACATCGCA site7-F2 GCTGAGAGGTTACTTACC CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTAATGATTTA site7-R ACTCCACCCTC ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATACT site8-F1 CCACCCTCCTTCAAAAGA ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGACT site8-F2 CCACCCTCCTTCAAAAGA CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTTGGTGTTTG site8-R CCAAATGTCT ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATGG site9_F1 GCACATATTCAGAAGGCA ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGGG site9_F2 GCACATATTCAGAAGGCA CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTAGTGAAAG site9_R ACTTTAAAGGGAGCA ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATCAC site10-F1 AATTAAGAGTTGTCATA ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGCA -F2 CAATTAAGAGTTGTCATA CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTCTCAGCTA site10-R GAGCAGCTGAAC ATTCCTGCTGAACCGCTCTTCCGATCTGACACTTG site11-F1 ATAATCCATC ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGTCA site11-F2 ATGTAGACATCTATGTAG ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATTCA -R ATGTAGACATCTATGTAG ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATACT 12 -F1 GCAAAAGGCTGAAGAGC site12-F2 ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGACT GCAAAAGGCTGAAGAGC ACACTCTTTCCCTACACGACGCTCTTCCGATCTGCCTAAACT site12-F3 GCAAAAGGCTGAAGAGC ACACTCTTTCCCTACACGACGCTCTTCCGATCTTGGTCAACT site12-F4 GCAAAAGGCTGAAGAGC CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTGCCTATAA site12-R AATAGAGCCCTGTCAA ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATCTC site13-F1 TATTTTATAGGCTTCTTC ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGCTC site13-F2 ATAGGCTTCTTC CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTAGCCACCA site13-R CCCAAGTGATC ACACTCTTTCCCTACACGACGCTCTTCCGATCTACATCGTTC site14-F1 CAGACATTAAAGATAGTC ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATTTC site14-F2 CAGACATTAAAGATAGTC CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTAATCATGA site14-R TGGTGAAGATAAG ACACTCTTTCCCTACACGACGCTCTTCCGATCTCGTGATCCG site15-F1 ACAAACATTAAA ACACTCTTTCCCTACACGACGCTCTTCCGATCTCCGGCAGA site15-F2 GACAAACATTAAA CTCGGCATTCCTGCTGAACCGCTCTTCCGATCTAGCTAGGA site15-R AGCCATGGCAAG ACGGCGACCACCGAGATCTACACTCTTTCCCTACA na -F cgac*g*c adaptor CAAGCAGAAGACGGCATACGAGATCGGTCTCGGCATTCCT PE-PCR-R GCTGAACc*g*c Multiplex sequencing PCR primer ACACTCTTTCCCTACACGACGCTCTTCCGATCTAGTGCATA site3-M-F GTATGTGCTAGATGCTG GTGACTGGAGTTCAGACGTGTGCTCTTCCGATCTTGATCTC site3-M-R TAAGAAGGCAAATGAGAC CAAGCAGAAGACGGCATACGAGATN1N2N3N4N5N6GTGAC illumina Index-PCR TGGAGTTCAGACGTGTGCTCTTCCGATCT adaptor sal- AATGATACGGCGACCACCGAGATCTACACTCTTTCCCTACA PCR CGACGCTCTTCCGATCT *index-PCR primers are purchased from epicentre (ScriptSeq™ Index PCR Primers) EXAMPLE VIII Genome Editing Assessment System (GEAS) Next generation cing has been ed to detect rare genomic alterations. See references 27-30 hereby incorporated by reference in their entireties. To enable wide use of this approach to quickly assess HDR and NHEJ ency in hiPSCS, software was created, referred to as a "pipeline", to e the genome engineering data. This pipeline is integrated in one single Unix module, which uses different tools such as R, BLAT, and FASTX t.

Barcode splitting: Groups of samples were pooled together and sequenced using MiSeq 150bp paired end (PE150) (Illumina Next Gen Sequencing), and later separated based on DNA es using FASTX Toolkit.

Quality filtering: Nucleotides with lower sequence quality (phred score<20) were d.

After trimming, reads shorter than 80 nucleotides were discarded.

Mapping: BLAT was used to map the paired reads independently to the reference genome and .psl files were generated as output.

Indel calling: Indels were defined as the full length reads containing 2 blocks of matches in the alignment. Only reads following this pattern in both paired end reads were considered. As a y control, the indel reads were required to possess l 70nt matching with the reference genome and both blocks to be at least 20 nt long. Size and position of indels were calculated by the positions of each block to the reference genome. Non-homologous end joining (NHEJ) has been ted as the percentage of reads containing indels (see equation 1 below). The majority of NHEJ events have been detected at the targeting site vicinity.

Homology directed ination (HDR) efficiency: Pattern matching (grep) within a 12bp window centering over DSB was used to count specific signatures corresponding to reads containing the reference sequence, modifications of the reference sequence (2bp intended mismatches), and reads containing only 1bp mutation within the 2bp intended mismatches (see equation 1 below).

Equation 1. Estimation of NHEJ and HDR A= reads cal to the reference: XXXXXABXXXXX B= reads containing 2bp mismatch programed by ssODN: XXXXXabXXXXX C= reads containing only 1 bp mutation in the target site: such as XXXXXaBXXXXX or XXXXXAbXXXXX D = reads containing indels as described above EXAMPLE IX Genotype Screening of Colonized hiPSCs Human iPS cells on feeder-free cultures were pre-treated with mTesr-1 media supplemented with SMC4 (5 uM thiazovivin,1 uM CHIR99021, 0.4 uM PD0325901, 2 uM SB431542) (see reference 23 hereby incorporated by reference in its entirety for at least 2 hrs prior to FACS sorting. Cultures were dissociated using Accutase (Millipore) and resuspended in mTesr- 1 media supplemented with SMC4 and the viability dye ToPro-3 (Invitrogen) at concentration of 1~2 X107 /mL. Live hiPS cells were single-cell sorted using a BD ia II SORP UV (BD ences) with 100um nozzle under sterile conditions into l plates coated with irradiated CF-1 mouse embryonic fibroblasts (Global Stem). Each well contained hES cell medium (see reference 31 hereby incorporated by nce in its entirety) with 100 ng / ml inant human basic last Growth Factor (bFGF) pore) supplemented with SMC4 and 5 ug / ml fibronectin (Sigma). After sorting, plates were centrifuged at 70 x g for 3 min. Colony formation was seen 4 days post sorting, and the culture media was replaced with hES cell medium with SMC4. SMC4 can be removed from hES cell medium 8 days after g.

A few thousand cells were harvested 8 days after Fluorescence-activated cell sorting (FACS) and 0.1ul prepGEM tissue protease enzyme ) and 1ul prepGEM gold buffer (ZyGEM) were added to 8.9 µl of cells in the medium. The reactions were then added to 40 µl of PCR mix containing 35.5ml platinum 1.1X Supermix (Invitrogen), 250nM of each dNTP and 400nM primers. Reactions were incubated at 95°C for 3min followed by 30 cycles of 95°C, 20s; 65°C, 30s and 72°C, 20s. Products were Sanger sequenced using either one of the PCR primers in Table 5 and sequences were ed using DNASTAR (DNASTAR).

EXAMPLE X Immunostaining and Teratoma Assays of hiPSCs Cells were incubated in the KnockOut DMEM/F-12 medium at 37˚C for 60 minutes using the following antibody: Anti-SSEA-4 PE (Millipore) (1: 500 diluted); Tra60 (BD Pharmingen) (1:100 diluted). After the incubation, cells were washed three times with KnockOut DMEM/F-12 and imaged on the Axio Observer Z.1 (ZIESS).

To t teratoma formation analysis, human iPSCs were harvested using collagenase type IV (Invitrogen) and the cells were resuspended into 200 µl of el and injected intramuscularly into the hind limbs of Rag2gamma knockout mice. Teratomas were isolated and fixed in formalin between 4 - 8 weeks after the ion. The teratomas were uently analyzed by hematoxylin and eosin staining.

EXAMPLE XI Targeting Genomic Loci in Human Somatic Cells and Human Stem Cells Using NS According to certain ments, TALEs known to those of skill in the art are modified or re-coded to eliminate repeat sequences. Such TALEs suitable for cation and use in the genome editing methods in viral delivery vehicles and in various cell lines and organisms described herein are disclosed in references 2, 7-12 hereby incorporated by nce herein in their entireties. Several strategies have been developed to assemble the repetitive TALE RVD array sequences (see references 14 and 32-34 hereby incorporated by reference herein in their entireties.

However, once assembled, the TALE sequence repeats remain unstable, which limits the wide utility of this tool, especially for viral gene delivery vehicles (see references 13 and 35 hereby incorporated by reference herein in their entireties. Accordingly, one embodiment of the present sure is directed to TALEs lacking repeats, such as completely lacking repeats. Such a recoded TALE is advantageous because it enables faster and simpler synthesis of extended TALE RVD arrays.

To eliminate repeats, the tide sequences of TALE RVD arrays were computationally d to minimize the number of sequence repeats while maintaining the amino acid composition. Re-coded TALE (Re-TALEs) encoding 16 tandem RVD DNA recognition monomers, plus the final half RVD repeat, are devoid of any 12bp repeats (see Fig. 5a). Notably, this level of recoding is sufficient to allow PCR amplification of any specific monomer or subsection from a full-length re-TALE construct (see Fig. 5b). The improved design of re-TALEs may be synthesized using standard DNA synthesis technology (see reference 36 hereby incorporated by reference in its entirety t incurring the additional costs or procedures ated with repeatheavy sequences. rmore, the recoded sequence design allows efficient assembly of re-TALE constructs using a modified isothermal assembly reaction as described in the methods herein and with nce to Fig. 6.

Genome editing NGS data was statistically analyzed as follows. For HDR specificity analysis, an exact binomial test was used to compute the probabilities of observing various numbers of sequence reads containing the 2bp mismatch. Based on the sequencing results of 10bp windows before and after the targeting site, the maximum base change rates of the two windows (P1 and P2) were estimated. Using the null esis that the changes of each of the two target bp were independent, the ed probability of observing 2bp mismatch at the targeting site by chance as the product of these two probabilities (P1*P2) was ed. Given a dataset containing N numbers of total reads and n number of HDR reads, we calculated the p-value of the observed HDR efficiency was calculated. For HDR sensitivity analysis, the ssODN DNA donors contained a 2bp mismatch t the targeting genome, which made likely the co-presence of the base changes in the two target bp if the ssODN was incorporated into the targeting genome. Other ended observed ce changes would not likely change at the same time. Accordingly, nonintended changes were much less interdependent. Based on these assumptions, mutual information (MI) was used to measure the mutual dependence of simultaneous two base pair changes in all other pairs of positions, and the HDR detection limit was estimated as the st HDR where MI of the targeting 2bp site is higher than MI of all the other position pairs. For a given experiment, HDR reads with intended 2bp mismatch from the original fastq file were identified and a set of fastq files with diluted HDR efficiencies were simulated by systematically ng different numbers of HDR reads from the original data set. Mutual information (MI) was computed between all pairs of positions within a 20bp window centered on the targeting site. In these calculations, the mutual information of the base composition between any two positions is computed. Unlike the HDR specificity measure described above, this measure does not assess the tendency of position pairs to change to any ular pairs of target bases, only their tendency to change at the same time. (see Fig. 8A). Table 6 shows HDR and NHEJ efficiency of re-TALEN/ssODN targeting CCR5 and NHEL efficiency of Cas9-gRNA. We coded our analysis in R and MI was computed using the package eo.

Table 6 HDR detection # HDR NHEJ limit based on NHEJ HDR targeting cell type (reTALEN) (reTALE) Information gRNA) (Cas9-gRNA) site (%) (%) analysis 1 PGP1-iPS 0.06% 0.80% 0.04% 0.58% 0.38% 2 PGP1-iPS 0.48% 0.26% 0.01% 16.02% 3.71% 3 PGP1-iPS 1.71% 0.07% 0.03% 3.44% 3.20% 4 PGP1-iPS 0.02% 1.20% 0.02%* 1.50% 0.14% PGP1-iPS 0.80% 0.04% 0.00% 3.70% 0.39% 6 PGP1-iPS 0.20% 0.73% 0.00% 1.12% 0.49% 7 PGP1-iPS 0.01% 0.15% 0.01%* 1.98% 1.78% 8 PGP1-iPS 0.03% 0.00% 0.00% 1.85% 0.03% 9 PGP1-iPS 1.60% 0.06% 0.00% 0.50% 0.13% PGP1-iPS 0.68% 1.25% 0.01% 8.77% 1.32% 11 PGP1-iPS 0.06% 0.27% 0.00% 0.62% 0.44% 12 PGP1-iPS 1.60% 0.03% 0.04% 0.18% 0.99% 13 PGP1-iPS 0.00% 1.47% 0.00% 0.65% 0.02% 14 PGP1-iPS 0.47% 0.13% 0.02% 2.50% 0.31% PGP1-iPS 0.8 0.14 0.08% 1.50 1.10% * The group where HDR detection limit exceeds the real HDR detected Correlations between genome editing efficiency and epigenetic state were addressed as follows. Pearson correlation coefficients were computed to study le ations between epigenetic parameters (DNase I HS or nucleosome occupancy) and genome engineering efficiencies (HDR, NHEJ). Dataset of DNAaseI Hypersensitivity was downloaded from UCSC genome r. hiPSCs DNase I HS: /gbdb/hg19/bbi/wgEncodeOpenChromDnaseIpsnihi7Sig.bigWig To compute P-values, the observed correlation was ed to a simulated distribution which was built by randomizing the position of the epigenetic parameter (N=100000). Observed ations higher than the 95th percentile, or lower than the 5th percentile of the simulated distribution were considered as potential associations.

The on of reTALEN in comparison with the corresponding non-recoded TALEN in human cells was determined. A HEK 293 cell line ning a GFP reporter cassette carrying a frame-shifting insertion was used as described in reference 37 hereby incorporated by reference in its entirety. See also Fig. 1a. Delivery of TALENs or reTALENs targeting the insertion sequence, er with a promoter-less GFP donor construct, leads to DSB-induced HDR repair of the GFP cassette, so that GFP repair ency can be used to evaluate the nuclease cutting efficiency. See reference 38 hereby incorporated by reference in its entirety. reTALENs induced GFP repair in 1.4% of the transfected cells, similar to that achieved by TALENs (1.2%) (see Fig. 1b). The activity of reTALENs at the AAVS1 locus in PGP1 hiPSCs was tested (see Fig. 1c) and successfully recovered cell clones containing specific insertions (see Fig. 1d,e), confirming that reTALENs are active in both somatic and pluripotent human cells.

The elimination of s enabled generation of functional lentivirus with a E cargo. Specifically, lentiviral particles were packaged encoding re-TALE-2A-GFP and were tested for activity of the re-TALE-TF d by viral particles by transfecting a y reporter into a pool of lenti-reTALE-2A-GFP infected 293T cells. 293T cells transduced by lenti-re-TALE-TF showed 36X reporter expression activation compared with the reporter only negative (see Fig. 7a,b,c). The sequence integrity of the re-TALE-TF in the lentiviral infected cells was checked and full-length s in all 10 of the clones tested were detected. (see Fig. 7d).

EXAMPLE XII Comparison of ReTALEs and Cas9-gRNA efficiency in hiPSCs with Genome Editing Assessment System (GEAS) To compare the editing efficiencies of re-TALENs versus Cas9-gRNA in hiPSCs, a next- generation sequencing platform (Genome Editing ment System) was developed to identify and quantify both NHEJ and HDR gene editing events. A re-TALEN pair and a Cas9-gRNA were designed and constructed, both targeting the upstream region of CCR5 (re-TALEN, Cas9-gRNA pair #3 in Table 3), along with a 90nt ssODN donor identical to the target site except for a 2bp mismatch (see Fig. 2a). The se constructs and donor ssODN were transfected into hiPSCs.

To quantitate the gene g efficiency, paired-end deep sequencing on the target genomic region was conducted 3 days after transfection. HDR efficiency was measured by the percentage of reads containing the precise 2bp mismatch. NHEJ ency was measured by the percentage of reads carrying indels.

Delivery of the ssODN alone into hiPSCs resulted in minimal HDR and NHEJ rates, while delivery of the re-TALENs and the ssODN led to efficiencies of 1.7% HDR and 1.2% NHEJ (see Fig. 2b). The introduction of the Cas9-gRNA with the ssODN led to 1.2% HDR and 3.4% NHEJ encies. Notably, the rate of genomic deletions and insertions peaked in the middle of the spacer region n the two reTALENs binding site, but peaked 3-4bp upstream of the Protospacer ated Motif (PAM) sequence of Cas9-gRNA targeting site (see Fig. 2b), as would be expected since double stranded breaks take place in these regions. A median genomic deletion size of 6bp and insertion size of 3bp generated by the re-TALENs was observed and a median deletion size of 7bp and ion of 1bp by the Cas9-gRNA was ed (see Fig. 2b), consistent with DNA lesion patterns usually generated by NHEJ (see reference 4 hereby incorporated by reference in its entirety.) Several analyses of the next-generation sequencing platform revealed that GEAS can detect HDR detection rates as low as , which is both highly reproducible (coefficient of variation between replicates = ± 15% * measured efficiency) and 400X more sensitive than most commonly used mismatch sensitive endonuclease assays (see Fig. 8). re-TALEN pairs and Cas9-gRNAs targeted to n sites at the CCR5 genomic locus were built to determine editing efficiency (see Fig. 2c, see Table 3). These sites were selected to represent a wide range of DNaseI sensitivities (see reference 39 hereby incorporated by reference in its entirety. The nuclease ucts were transfected with the ponding ssODNs donors (see Table 3) into PGP1 hiPSCs. Six days after transfection, the genome editing efficiencies at these sites were profiled (Table 6). For 13 out of 15 re-TALEN pairs with ssODN donors, NHEJ and HDR was detected at levels above statistical detection thresholds, with an e NHEJ efficiency of 0.4% and an average HDR efficiency of 0.6% (see Fig. 2c). In addition, a statistically significant positive correlation (r2 =0.81) was found between HR and NHEJ efficiency at the same targeting loci (P<1 X 10-4) (see Fig. 9a), suggesting that DSB generation, the common upstream step of both HDR and NHEJ, is a rate-limiting step for N-mediated genome editing.

In contrast, all 15 Cas9-gRNA pairs showed significant levels of NHEJ and HR, with an average NHEJ efficiency of 3% and an average HDR efficiency of 1.0% (see Fig. 2c). In addition, a positive correlation was also detected between the NHEJ and HDR efficiency introduced by Cas9-gRNA (see Fig. 9b) (r2=0.52, p=0.003), consistent with observations for reTALENs. The NHEJ efficiency achieved by Cas9-gRNA was significantly higher than that achieved by reTALENs (t-test, paired-end, P=0.02). A moderate but statistically significant correlation between NHEJ efficiency and the melting temperature of the gRNA targeting sequence was observed (see Fig. 9c) (r2=0.28, p=0.04), suggesting that the strength of base-pairing between the gRNA and its genomic target could explain as much as 28% of the variation in the efficiency of Cas9-gRNA- mediated DSB generation. Even though Cas9-gRNA produced NHEJ levels at an average of 7 times higher than the corresponding reTALEN, Cas9-gRNA only achieved HDR levels (average=1.0%) similar to that of the corresponding reTALENs (average = 0.6%). Without wishing to be bound by scientific theory, these s may t either that the ssODN concentration at the DSB is the limiting factor for HDR or that the genomic break structure created by the Cas9-gRNA is not favorable for effective HDR. No correlation between DNaseI HS and the genome ing efficiencies was observed for either method. (see Fig. 10).

EXAMPLE XIII Optimization of ssODN Donor Design for HDR Highly-performing ssODNs in hiPSCs were designed as follows. A set of ssODNs donors of different lengths (50-170nt), all carrying the same 2bp mismatch in the middle of the spacer region of the CCR5 re-TALEN pair #3 target sites was designed. HDR ency was ed to vary with ssODN length, and an l HDR ency of ~1.8% was observed with a 90 nt ssODN , whereas longer ssODNs decreased HDR efficiency (see Fig. 3a). Since longer homology regions e HDR rates when dsDNA donors are used with nucleases (see reference 40 hereby incorporated by reference in its entirety), possible s for this result may be that ssODNs are used in an ative genome repair process; longer ssODNs are less available to the genome repair apparatus; or that longer ssODNs incur ve effects that offset any improvements gained by longer homology, compared to dsDNA donors (see reference 41 hereby incorporated by reference in its entirety.) Yet, if either of the first two reasons were the case, then NHEJ rates should either be unaffected or would increase with longer ssODNs because NHEJ repair does not e the ssODN donor. However, NHEJ rates were observed to decline along with HDR (see Fig. 3a), suggesting that the longer ssODNs present offsetting s. Possible hypotheses would be that longer ssODNs are toxic to the cell (see reference 42 hereby incorporated by reference in its entirety), or that transfection of longer ssODNs saturates the DNA processing machinery, thereby causing decreased molar DNA uptake, and reducing the capacity of the cells to take up or express re-TALEN plasmids.

How rate of incorporation of a mismatch carried by the ssODN donor varies with its distance to the double stranded break ("DSB") was examined. A series of 90nt ssODNs all possessing the same 2bp mismatch (A) in the center of the spacer region of re-TALEN pair #3 was designed. Each ssODN also contained a second 2bp mismatch (B) at varying distances from the center (see Fig. 3b). A ssODN possessing only the center 2bp ch was used as a control.

Each of these ssODNs was introduced individually with re-TALEN pair #3 and the outcomes were analyzed with GEAS. We found that overall HDR -- as measured by the rate at which the A mismatch was incorporated (A only or A+B) -- decreased as the B mismatches became farther from the center (see Fig. 3b, see Fig. 11a). The higher l HDR rate observed when B is only 10bp away from A may reflect a lesser need for annealing of the ssODN against genomic DNA immediately proximal to the dsDNA break.

For each distance of B from A, a fraction of HDR events only incorporated the A mismatch, while another fraction incorporated both A and B mismatches (see Fig. 3b (A only and A+B)), These two outcomes may be due to gene conversion tracts (see reference 43 hereby incorporated by reference in its entirety) along the length of the ssDNA oligo, whereby incoporation of A+B mismatches resulted from long conversion tracts that extended beyond the B mismatch, and incorporation of the A-only mismatch ed from shorter tracts that did not reach B. Under this interpretation, a distribution of gene conversion lengths in both directions along the ssODN were estimated (see Fig. 11b). The ted distribution implies that gene sion tracts progressively become less frequent as their lengths increase, a result very r to gene conversion tract distributions seen with dsDNA donors, but on a highly compressed distance scale of tens of bases for the ssDNA donor vs. hundreds of bases for dsDNA donors. Consistent with this result, an experiment with a ssODN ning three pairs of 2bp mismatches spaced at intervals of 10nt on either side of the central 2bp mismatch "A" gave rise to a pattern in which A alone was incorporated 86% of the time, with multiple B mismatches incorporated at other times (see Fig. 11c). Although the s of B only incorporation events were too low to te a distribution of tract lengths less than 10bp, it is clear that the short tract region within 10bp of the nuclease site predominates (see Fig. 11b). Finally, in all experiments with single B mismatches, a small fraction of B-only incorporation events is seen (0.04%~0.12%) that is roughly constant across all B distances from A.

Furthermore, analysis was carried out of how far the ssODN donor can be placed from the re-TALEN-induced dsDNA break while still observing oration. A set of 90nt ssODNs with central 2bp mismatches targeting a range of larger distances (-600bp to +400bp) away from the re- TALEN-induced dsDNA break site were tested. When the ssODNs matched ≥40bp away, we ed >30x lower HDR efficiencies compared to the control ssODN positioned centrally over the cut region (see Fig. 3c). The low level of incorporation that was observed may be due to processes unrelated to the dsDNA cut, as seen in experiments in which s are altered by a ssDNA donor alone see reference 42 hereby incorporated by reference in its entirety. Meanwhile, the low level of HDR present when the ssODN is ~40bp away may be due to a combination of weakened homology on the mismatch-containing side of the dsDNA cut along with insufficient ssODN oligo length on the other side of the dsDNA break.

The ssODNs DNA donor design for Cas9-gRNA mediated targeting was . Cas9- gRNA (C2) targeting the AAVS1 locus was constructed and ssODN donors of variable orientations (Oc: complementary to the gRNA and On: non-complementary to the gRNA) and lengths (30, 50, 70, 90, 110 nt) were designed. Oc achieved better efficiency than On, with a 70mer Oc achieving an optimal HDR rate of 1.5%. (see Fig. 3d) The same ssODN strand bias was ed using a Cas9-derived nickase (Cc: Cas9_D10A), e the fact that the HDR efficiencies mediated by Cc with ssODN were icantly less than C2 (t-test, paired-end, P=0.02). (see Fig. 12).

EXAMPLE XIV hiPSC Clonal Isolation of Corrected Cells GEAS revealed that re-TALEN pair #3 achieved precise genome editing with an efficiency of ~1% in hiPSCs, a level at which correctly edited cells can usually be ed by screening clones. HiPSCs have poor viability as single cells. Optimized protocols described in reference 23 hereby incorporated by reference in its ty along with a -cell FACS sorting procedure was used to ish a robust rm for single hiPSCs sorting and maintenance, where hiPSC clones can be recovered with survival rates of >25%. This method was combined with a rapid and efficient genotyping system to conduct chromosomal DNA extraction and targeted genome amplification in 1-hour single tube reactions, enabling large scale genotyping of edited hiPSCs.

Together, these methods se a pipeline for robustly obtaining genome-edited hiPSCs without selection.

To demonstrate this system (see Fig. 4a), PGP1 hiPSCs were transfected with a pair of re- TALENs and an ssODN targeting CCR5 at site #3 (see Table 3). GEAS was performed with a portion of the transfected cells, finding an HDR ncy of 1.7% (see Fig. 4b). This information, along with the 25% recovery of sorted single-cell clones, allow estimation of obtaining at least one correctly-edited clone from five 96-well plates with Poisson probability 98% (assuming μ= ). Six days after transfection, hiPSCs were FACS-sorted and eight days after sorting, 100 hiPSC clones were screened. Sanger sequencing revealed that 2 out of 100 of these unselected hiPSC colonies contained a zygous pe possessing the 2bp mutation introduced by the ssODN donor see (Fig. 4c). The targeting efficiency of 1% (1%=2/2*100, 2 mono-allelic corrected clones out of 100 cell screened) was consistent with the next-generation sequencing analysis (1.7%) (see Fig. 4b). The pluripotency of the resulting hiPSCs was confirmed with immunostaining for SSEA4 and TRA60 (see Fig. 4d). The successfully targeted hiPSCs clones were able to generate mature teratomas with features of all three germ layers (see Fig. 4e).

EXAMPLE XV Method for Continuous Cell Genome g ing to certain ments, a method is described for genome editing in cells, including a human cell, for example a human stem cell, n the cell is genetically modified to include a nucleic acid encoding an enzyme that forms a co-localization complex with RNA complementary to the target DNA and that s the target DNA in a site specific manner. Such an enzyme includes an RNA guided DNA binding protein, such as an RNA-guided DNA binding protein of a Type II CRISPR system. An exemplary enzyme is Cas9. According to this embodiment, the cell expresses the enzyme and guide RNA is provided to the cell from the media surrounding the cell. The guide RNA and the enzyme form a co-localization complex at target DNA where the enzyme cuts the DNA. Optionally, a donor nucleic acid may be present for insertion into the DNA at the cut site, for example by ologous end joining or homologous recombination. According to one embodiment, the nucleic acid ng an enzyme that forms a co-localization complex with RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner, such as Cas9, is under the influence of a promoter, such as the nucleic acid can be ted and silenced. Such ers are well known to those of skill in the art. One exemplary promoter is the dox inducible promoter. According to one embodiment, the cell is genetically modified by having reversibly inserted into its genome the nucleic acid encoding an enzyme that forms a co-localization complex with RNA complementary to the target DNA and that s the target DNA in a site specific manner. Once inserted, the nucleic acid can be removed by use of a reagent, such as a transposase. In this manner, the nucleic acid can be easily removed after use.

According to one embodiment, a continuous genome editing system in human induced pluripotent stem cells s) using a CRISPR system is described. According to an exemplary embodiment, the method includes use of a hiPSC line with Cas9 reversibly inserted in the genome (Cas9-hiPSCs); and gRNAs which have been modified from their native form to allow their passage from media surrounding the cells into the cells for use with the Cas9. Such gRNA has been treated with a phosphatase in a manner to remove phosphate groups. Genome editing in the cell is carried out with Cas9 by supplementing phosphatase treated gRNA in the tissue culture media. This approach enables scarless genome editing in HiPSCs with up to 50% efficiencies with single days of ent, 2-10X times more efficient than the best efficiencies reported so far.

Further, the method is easy to use and with significantly lower cellular toxicity. Embodiments of the present disclosure include single editing of hiPSCs for biological research and therapeutic applications, multiplex editing of hiPSCs for biological research and therapeutic applications, directional hiPSCs evolution and phenotype screening of hiPSCs and its derivative cells.

According to certain embodiments, other cell lines and organisms described herein can be used in addition to stem cells. For example, the method described herein can be used to animal cells such as mouse or rat cells so that stable Cas9 integrated mouse cells and rat cells can be generated and tissue specific genome editing can be conducted by locally introducing phosphatase treated gRNA from media nding the cells. Moreover, other Cas9 derivatives can be inserted into many cell lines and sms, and targeted genomic manipulations, such as sequence specific nicking, gene activation, suppression and etic modification can be conducted.

Embodiments of the present disclosure are directed to making stable hiPSCs with Cas9 inserted into the genome. Embodiments of the t disclosure are directed to modifying RNA to enable entry into a cell through the cell wall and co-localization with Cas9 while avoiding the immune response of the cell. Such modified guide RNA can achieve optimal transfection encies with minimal toxicity. Embodiments of the t disclosure are directed to optimzied genome editing in Cas9-hiPSCs using phosphatase d gRNA. Embodiments of the present disclosure include eliminating Cas9 from hiPSCs to achieve scarless genome editing, where the nucleic acid encoding Cas9 has been reversibly placed into the cell genome.

Embodiments of the present disclosure include biomedical ering using hiPSCs with Cas9 inserted into the genome to create desired genetic mutations. Such engineered hiPSCs in pluripotency and can be sfully differentiated into various cell types, including cardiomyocyte, which fully recapitulate the phenotype of patient cell lines. ments of the present disclosure include libraries of phosphatase treated gRNAs for multiplex genome editing. Embodiments of the present disclosure e ting a y of PGP cell lines with each one carrying 1 to a few designated ons in the genome, which can serve as resource for drug screening. Embodiments of the present disclosure include generating PGP1 cell lines with all the retrotranselements barcoded with different sequences to track the location and activity of this element.

EXAMPLE XVI Generating Stable hiPSCs with Cas9 inserted into the Genome Cas9 was encoded under the dox inducible er and the construct was placed into a Piggybac vector which can be inserted into and removed out of the genome with the help of Piggybac transposase. PCR reaction validated the stable insertion of the vector (see Fig. 14). The inducible Cas9 expression was determined via RT-QPCR. The mRNA level of Cas9 increased 1000X after 8 hours of 1ug/mL DOX supplementation in the culture media and the level of Cas9 mRNA dropped to normal level ~ 20 hours after withdrawal of the DOX. (See Fig. 15).

According to one embodiment, the Cas9-hiPSC system based genome editing bypasses the transfection procedure of Cas9 plasmid/RNA, a large construct usually with < 1% transfection efficiency in hiPSCs. The present Cas9-hiPSC system can serve as a platform to perform high efficient genomic engineering in human stem cells. In addition, the Cas9 te introduced into the hiPSCs using ac system can be removed out from the genome easily upon ucing of transposases.

E XVII Phosphatase Treated Guide RNA To enable continuous genome editing on Cas9-hiPSCs, a series of modified RNA encoding gRNA were generated and supplemented into Cas9-iPS e medium in complex with liposome.

Phosphatase treated native RNA t any capping achieved the optimal HDR efficiency of 13%, 30X more than previously reported 5’Cap-Mod RNA (see Fig. 16).

According to one embodiment, guide RNA is physically attached to the donor DNA. In this manner, a method is described of coupling Cas9 mediated genomic cutting and ssODN- mediated HDR, thus stimulating sequence specific genomic editing. gRNA linked with DNA ssODN donor with optimized tration ed 44% HDR and unspecific NHEJ 2% (see Fig. 17). Of note, this procedure does not incurred visible toxicity as observed with nucleofection or electroporation.

According to one embodiment, the present disclosure describes an in vitro engineered RNA ure encoding gRNA, which achieved high transfection efficiency, genome editing efficiency in collaboration with genomically inserted Cas9. In addition, the present sure describes a gRNA-DNA chimeric construct to couple a genomic cutting event with the homology directed recombination reaction.

EXAMPLE XVIII Eliminating Reversibly ered Cas9 from hiPSCs to Achieve Scarless Genome Editing According to certain embodiments, a Cas9 cassette is inserted into the genome of hiPSC cells using a reversible vector. Accordingly, a Cas9 cassette was ibly inserted into the genome of hiPSC cells using a PiggyBac vector. The Cas9 cassette was removed from the genome edited hiPSCs by transfecting the cell with transposase-encoding plasmid. Accordingly, ments of the present disclosure include use of a reversible vector, which is known to those of skill in the art. A reversible vector is one which can be inserted into a genome, for example, and then removed with a corresponding vector removal enzyme. Such vectors and corresponding vector removal enzymes are known to those of skill in the art. A screen was performed on colonized iPS cells and colonies devoid of Cas9-cassette were recovered as med by PCR on. Accordingly, the present disclosure describes method of genome editing without affecting the rest of the genome by having a permanent Cas9 cassette present in the cell.

E XIX Genome Editing in iPGP1 Cells ch into the pathogenesis of cardiomyopathy has ically been hindered by the lack of suitable model systems. Cardiomyocyte differentiation of patient-derived induced pluripotent stem cells (iPSCs) offers one promising avenue to surmount this barrier, and reports of iPSC modeling of myopathy have begun to emerge. However, realization of this promise will require approaches to overcome genetic heterogeneity of patient-derived iPSC lines.

Cas9-iPGP1 cell lines and phosphatase treated guide RNA bound to DNA were used to generated three iPSC lines that are isogenic except for the sequence at TAZ exon 6, which was identified to carry single nucleotide on in Barth me patients. Single round of RNA transfection achieved ~30% HDR efficiency. Modified Cas9-iPGP1 cells with d mutations were colonized (see Fig. 18) and the cell lines were entiated into myocyte.

Cardiomyocyte derived from the engineered Cas9-iPGP1 fully recapitulated the cardiolipin, mitochondrial, and ATP deficits observed in patient-derived iPSCs and in the neonatal rat TAZ knockdown model (see Fig. 19). Accordingly, methods are described for correcting mutations causing diseases in pluripotent cells followed by differentiation of the cells into desired cell types.

EXAMPLE XX Materials and Methods 1. Establishment of PiggyBac Cas9 dox inducible stable human iPS/ES lines 1. After cells reached 70% confluence pretreat the culture with ROCK inhibitor Y27632 at final concentration of 10uM for overnight. 2. The next day e the nucleofection solution by combine the 82 μl of human stem cell nucleofector solution and 18ul supplement 1 in a sterile 1.5 ml eppendorf tube. Mix well.

Incubate solution at 37°C for 5 mins. 3. te mTeSR1; gently rinse the cells with DPBS at 2 mL/well of a six-well plate. 4. Aspirate the DPBS, add 2 mL/well of Versene, and put the culture back to incubator at 37℃ until they become rounded up and loosely adherent, but not detached. This es 3–7 min.

. Gently aspirate the Versene and add mTeSR1. Add 1ml mTeSR1 and dislodge the cells by gently flowing mTeSR1 over them with a 1,000 uL micropipette. 6. Collect the dislodged cells, gently triturate them into a single-cell sion, and quantitate by hemacytometer and adjust cell density to 1million cells per ml. 7. Add 1ml cell suspension l eppendorf tube and centrifuge at 1100 RPM for 5 min in a bench top centrifuge. 8. Resuspend cells in 100 μl of human stem cell nucleofector solution from Step 2. 9. Transfer cells to a nucleofector cuvette using a 1 ml pipette tip. Add 1 μg of plasmid osonase and 5ug PB Cas9 plasmids into the cell suspension in the cuvette. Mix cells and DNA by gentle swirling.

. Put the cuvette into the nucleofector. Programs B-016 was selected and fect cells by pressing button X. 11. Add 500ul mTeSR1 medium with ROCK inhibitor in the cuvette after nucleofection. 12. te the nucleofected cells from the cuvette using the provided Pasteur plastic pipette.

And transfer cells drop-wise into el coated well of 6 well plate mTeSR1 mediun with ROCK inhibitor. Incubate the cells at 37°C overnight. 13. Change the medium to mTesr1 the next day and after 72 hours of transfection;add puromycin at final concentration at 1ug/ml.And the line will be set up within 7 days. 2. RNA preparation 1． Prepare DNA template with T7 promoter upstream of gRNA coding sequence. 2． Purify the DNA using Mega Clear Purification and normalize the concentration. 3． Prepare Custom NTPS mixtures for different gRNA production. #1 Native RNA Mix [Final] (mM) GTP 7.5 ATP 7.5 CTP 7.5 UTP 7.5 Total volume #2 Capped Native RNA Mix [Final] (mM) 3’-O-Me-m7G Cap structure analog (NEB) 6 GTP 1.5 ATP 7.5 CTP 7.5 UTP 7.5 Total volume #3 Modified RNA Mix [Final] (mM) GTP 7.5 ATP 7.5 -Me-CTP (Tri-Link) 7.5 Pseudo-UTP (Tri-Link) 7.5 Total volume #4 /Modified RNA Mix [Final] (mM) 3’-O-Me-m7G Cap structure analog (NEB) 6 GTP 1.5 ATP 7.5 -Me-CTP (Tri-Link) 7.5 Pseudo-UTP (Tri-Link) 7.5 Total volume 4． e the in vitro transcription mix at room temperature.

Amt (ul) Custom NTPS (*Add vol/IVT rxn as indicated NA above) on ice PCR t (100ng/ul) = 1600ng total 16 ([final]=40ng/ul) Buffer X10 (MEGAscript kit from Ambion) @ RT T7 Enzyme (MEGAscript kit from Ambion) ． Incubate for 4 hours s ok) at 37°C (thermocycler). 6． Add 2μl Turbo DNAse (MEGAscript kit from Ambion) to each sample. Mix gently and incubate at 37°C for 15'. 7． Purify DNAse treated reaction using MegaClear from Ambion according to the manufacturer’s instructions. 8． Purify RNA using MEGAclear. (Purified RNA can be stored at -80 for several months). 9． To remove phosphate groups to avoid Toll 2 immune reaction from the host cell.

RNA Phosphatase treatment 1X 12 For each RNA sample ~100ul NA 10X Antarctic Phosphatase buffer 11ul 132 Antarctic atase 2ul 24 Gently mix sample and incubate at 37°C for 30' (30'-1hr ok) 3. RNA transfection 1. Plate 10K-20K cells per 48 well without antibiotics. Cells should be 30-50% confluent for transfection. 2. Change the cell media to with B18R /ml), DOX (1ug/ml), Puromycin (2ug/ml) at least two hours before the transfection. 3. Prepare the ection reagent ning gRNA (0.5ug~2ug), donor DNA (0.5ug~2ug)and RNAiMax, incubate the mixture in rm temperature for 15 minutes and transfer to the cell. 4. Single human iPS cells seed and single clone pickup 1. After 4 days of dox induction and 1 day dox withdraw,asperate the medium,rinse gently with the DPBS.add 2 mL/well of Versene, and put the culture back to incubator at 37℃ until they become rounded up and loosely adherent, but not ed. This requires 3–7 min. 2. Gently aspirate the Versene and add mTeSR1 .Add 1ml mTeSR1 and dislodge the cells by gently flowing mTeSR1 over them with a 1,000 uL ipette. 3. Collect the dislodged cells, gently triturate them into a single-cell suspension, and quantitate by hemacytometer and adjust cell y to 100K cells per ml. 4. Seeding the cells into matrigel coated 10 cm dishes with mTeSR1 plus ROCK inhibitor at cell density of 50K,100K and 400K per 10 cm dish.

. Single cell formed Clones screening 1. After 12 days culture in 10 cm dish and clones are big enough to be identified by naked eyes and labeled by colon marker. Do not allow clones become too big and adhere to each other. 2. Put the 10 cm dish to the culture hood and using a P20 pipette(set at 10ul) with filter tips. Aspirate 10ul medium for one well of 24 well plates. Pick up clone by scratching the clone into small pieces and transfer to one well of 24 well plate. Each filter tip for each clone. 3. After 4-5 days the clones inside one well of 24 well plate become big enough to split. 4. Aspirate the medium and rinse with 2 mL/well DPBS.

. Aspirate DPBS, replace with 250ul/well dispase (0.1 U/mL). and incubate the cells in dispase at 37℃ for 7 min. 6. Replace the dispase with 2ml DPBS. 7. Add 250ul mTeSR1. Using a cell scraper to lodge off the cells and collect the cells. 8. Tranfer 125ul cell suspension into a well of matrigel coated 24 wells plates. 9. Transfer 125ul cell suspension into 1.5ml eppendorf tube for c DNA extraction. 6. Clone screening 1. Centrifuge the tube from step7.7 2. Aspirate the medium and add 250ul lysis buffer per well (10mM+TrispH7.5+(or+8.0),10mMEDTA,10mM. 3. 10%SDS,40ug/mL+proteinase K(added fresh before using the buffer). 4. Incubate at 55 overnight. 5. PrecipitateDNA by adding 250ul Isopropanol. 6. Spin for 30 minutes at highest speed. Wash with 70% ethanol. 7. Gently remove ethanol.Air dry for 5 min. 8. end gDNA with100-200ul dH2O. 9. PCR amplification of the targeted genomic region with specific primers. 10. Sanger sequencing the PCR product with tive primer. 11. Analysis of Sanger sequence data and expansion of targeted clones. 7. Piggybac vector remove 1. Repeat the step 2.1-2.9 2. Transfer cells to a nucleofector cuvette using a 1 ml pipette tip.Add 2 μg plasmid of Transposonase into the cell suspension in the cuvette. Mix cells and DNA by gentle 3. Repeat the step 2.10-2.11 4. Asperate the nucleofected cells from the cuvette using the provided Pasteur plastic pipette. And transfer cells drop-wise into matrigel coated well of 10 cm dish with mTeSR1 medium plus ROCK tor. Incubate the cells at 37°C overnight.

. The next day change the medium to mTesr1 and change the medium every day for 4 following days. 6. After the clones became big enough pick up 20-50 clones and seeding into 24 well. 7. Genotype the clones with PB Cas9 PiggyBac vector s and expansion negative .

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In this specification where reference has been made to patent specifications, other external nts, or other sources of ation, this is generally for the purpose of providing a context for discussing the features of the invention. Unless specifically stated otherwise, reference to such external nts is not to be construed as an admission that such documents, or such sources of information, in any jurisdiction, are prior art, or form part of the common general knowledge in the In the description in this specification reference may be made to t matter that is not within the scope of the claims of the current application. That subject matter should be y identifiable by a person skilled in the art and may assist in putting into practice the invention as defined in the claims of this application.

The following numbered paragraphs define ular aspects of the present invention: 1. A method of altering target DNA in a cell comprising introducing into a cell a TALEN lacking repeat ces 100 bp or longer wherein the TALEN cleaves the target DNA and the cell undergoes nonhomologous end joining to produce altered DNA in the cell. 2. The method of paragraph 1 wherein the TALEN lacks repeat sequences 90 bp or longer. 3. The method of paragraph 1 wherein the TALEN lacks repeat sequences 80 bp or longer. 4. The method of paragraph 1 wherein the TALEN lacks repeat sequences 70 bp or longer. 5. The method of paragraph 1 wherein the TALEN lacks repeat sequences 60 bp or longer. 6. The method of aph 1 wherein the TALEN lacks repeat sequences 50 bp or . 7. The method of paragraph 1 wherein the TALEN lacks repeat ces 40 bp or longer. 8. The method of paragraph 1 wherein the TALEN lacks repeat sequences 30 bp or longer. 9. The method of paragraph 1 wherein the TALEN lacks repeat ces 20 bp or longer. 10. The method of paragraph 1 n the TALEN lacks repeat sequences 19 bp or longer. 11. The method of paragraph 1 wherein the TALEN lacks repeat sequences 18 bp or longer. 12. The method of paragraph 1 wherein the TALEN lacks repeat sequences 17 bp or longer. 13. The method of paragraph 1 wherein the TALEN lacks repeat sequences 16 bp or longer. 14. The method of paragraph 1 wherein the TALEN lacks repeat sequences 15 bp or longer. 15. The method of paragraph 1 wherein the TALEN lacks repeat sequences 14 bp or longer. 16. The method of paragraph 1 wherein the TALEN lacks repeat sequences 13 bp or longer. 17. The method of paragraph 1 n the TALEN lacks repeat ces 12 bp or longer. 18. The method of paragraph 1 wherein the TALEN lacks repeat sequences 11 bp or longer. 19. The method of paragraph 1 wherein the TALEN lacks repeat sequences 10 bp or longer.

. The method of paragraph 1 wherein the cell is a eukaryotic cell. 21. The method of paragraph 1 wherein the cell is a yeast cell, a plant cell or an animal cell. 22. The method of paragraph 1 wherein the cell is a somatic cell. 23. The method of paragraph 1 wherein the cell is a stem cell. 24. The method of paragraph 1 wherein the cell is a human stem cell.

. The method of paragraph 1 comprising introducing into the cell a first foreign nucleic acid encoding the TALEN, wherein the TALEN is expressed, and wherein the TALEN s the target DNA to produce altered DNA in the cell. 26. The method of paragraph 1 comprising ucing into the cell a virus including a first foreign nucleic acid ng the TALEN, wherein the TALEN is sed, and wherein the TALEN cleaves the target DNA to produce altered DNA in the cell. 27. The method of paragraph 1 comprising introducing into the cell a first foreign nucleic acid encoding the TALEN having a TALE sequence CTAACCCCTGAACAGGTAGTCGCTATAGCTTCAAATATCGGGGGCAAGCAAGC ACTTGAGACCGTTCAACGACTCCTGCCAGTGCTCTGCCAAGCCCATGGATTGACTCCG GAGCAAGTCGTCGCGATCGCGAGCAACGGCGGGGGGAAGCAGGCGCTGGAAACTGTT CAGAGACTGCTGCCTGTACTTTGTCAGGCGCATGGTCTCACCCCCGAACAGGTTGTCG CAATAGCAAGTAATATAGGCGGTAAGCAAGCCCTAGAGACTGTGCAACGCCTGCTCC TGTGTCAGGCTCACGGTCTGACACCTGAACAAGTTGTCGCGATAGCCAGTCA CGACGGGGGAAAACAAGCTCTAGAAACGGTTCAAAGGTTGTTGCCCGTTCTGTGCCAA GCACATGGGTTAACACCCGAACAAGTAGTAGCGATAGCGTCAAATAACGGGGGTAAA CAGGCTTTGGAGACGGTACAGCGGTTATTGCCGGTCCTCTGCCAGGCCCACGGACTTA CGCCAGAACAGGTGGTTGCAATTGCCTCCAACATCGGCGGGAAACAAGCGTTGGAAA CTGTGCAGAGACTCCTTCCTGTTTTGTGTCAAGCCCACGGCTTGACGCCTGAGCAGGTT GTGGCCATCGCTAGCCACGACGGAGGGAAGCAGGCTCTTGAAACCGTACAGCGACTT CTCCCAGTTTTGTGCCAAGCTCACGGGCTAACCCCCGAGCAAGTAGTTGCCATAGCAA GCAACGGAGGAGGAAAACAGGCATTAGAAACAGTTCAGCGCTTGCTCCCGGTACTCT GTCAGGCACACGGTCTAACTCCGGAACAGGTCGTAGCCATTGCTTCCCATGATGGCGG CAAACAGGCGCTAGAGACAGTCCAGAGGCTCTTGCCTGTGTTATGCCAGGCACATGGC CTCACCCCGGAGCAGGTCGTTGCCATCGCCAGTAATATCGGCGGAAAGCAAGCTCTCG TACAACGGCTGTTGCCAGTCCTATGTCAAGCTCATGGACTGACGCCCGAGCA GGTAGTGGCAATCGCATCTCACGATGGAGGTAAACAAGCACTCGAGACTGTCCAAAG ATTGTTACCCGTACTATGCCAAGCGCATGGTTTAACCCCAGAGCAAGTTGTGGCTATT GCATCTAACGGCGGTGGCAAACAAGCCTTGGAGACAGTGCAACGATTACTGCCTGTCT TATGTCAGGCCCATGGCCTTACTCCTGAGCAAGTCGTAGCTATCGCCAGCAACATAGG TGGGAAACAGGCCCTGGAAACCGTACAACGTCTCCTCCCAGTACTTTGTCAAGCACAC GGGTTGACACCGGAACAAGTGGTGGCGATTGCGTCCAACGGCGGAGGCAAGCAGGCA CTGGAGACCGTCCAACGGCTTCTTCCGGTTCTTTGCCAGGCTCATGGGCTCACGCCAG AGCAGGTGGTAGCAATAGCGTCGAACATCGGTGGTAAGCAAGCGCTTGAAACGGTCC AGCGTCTTCTGCCGGTGTTGTGCCAGGCGCACGGACTCACACCAGAACAAGTGGTTGC TATTGCTAGTAACAACGGTGGAAAGCAGGCCCTCGAGACGGTGCAGAGGTTACTTCCC GTCCTCTGTCAAGCGCACGGCCTCACTCCAGAGCAAGTGGTTGCGATCGCTTCAAACA ATGGTGGAAGACCTGCCCTGGAA, or a sequence having at least 90% sequence identity to the TALE sequence, wherein the TALEN is expressed, and wherein the TALEN cleaves the target DNA to e altered DNA in the cell. 28. The method of paragraph 1 comprising introducing into the cell a virus including a first foreign nucleic acid encoding the TALEN having a TALE sequence CTAACCCCTGAACAGGTAGTCGCTATAGCTTCAAATATCGGGGGCAAGCAAGC ACTTGAGACCGTTCAACGACTCCTGCCAGTGCTCTGCCAAGCCCATGGATTGACTCCG GAGCAAGTCGTCGCGATCGCGAGCAACGGCGGGGGGAAGCAGGCGCTGGAAACTGTT CAGAGACTGCTGCCTGTACTTTGTCAGGCGCATGGTCTCACCCCCGAACAGGTTGTCG CAATAGCAAGTAATATAGGCGGTAAGCAAGCCCTAGAGACTGTGCAACGCCTGCTCC CCGTGCTGTGTCAGGCTCACGGTCTGACACCTGAACAAGTTGTCGCGATAGCCAGTCA CGACGGGGGAAAACAAGCTCTAGAAACGGTTCAAAGGTTGTTGCCCGTTCTGTGCCAA GCACATGGGTTAACACCCGAACAAGTAGTAGCGATAGCGTCAAATAACGGGGGTAAA CAGGCTTTGGAGACGGTACAGCGGTTATTGCCGGTCCTCTGCCAGGCCCACGGACTTA AACAGGTGGTTGCAATTGCCTCCAACATCGGCGGGAAACAAGCGTTGGAAA CTGTGCAGAGACTCCTTCCTGTTTTGTGTCAAGCCCACGGCTTGACGCCTGAGCAGGTT ATCGCTAGCCACGACGGAGGGAAGCAGGCTCTTGAAACCGTACAGCGACTT CTCCCAGTTTTGTGCCAAGCTCACGGGCTAACCCCCGAGCAAGTAGTTGCCATAGCAA GCAACGGAGGAGGAAAACAGGCATTAGAAACAGTTCAGCGCTTGCTCCCGGTACTCT GTCAGGCACACGGTCTAACTCCGGAACAGGTCGTAGCCATTGCTTCCCATGATGGCGG CAAACAGGCGCTAGAGACAGTCCAGAGGCTCTTGCCTGTGTTATGCCAGGCACATGGC CTCACCCCGGAGCAGGTCGTTGCCATCGCCAGTAATATCGGCGGAAAGCAAGCTCTCG AAACAGTACAACGGCTGTTGCCAGTCCTATGTCAAGCTCATGGACTGACGCCCGAGCA GGTAGTGGCAATCGCATCTCACGATGGAGGTAAACAAGCACTCGAGACTGTCCAAAG ATTGTTACCCGTACTATGCCAAGCGCATGGTTTAACCCCAGAGCAAGTTGTGGCTATT GCATCTAACGGCGGTGGCAAACAAGCCTTGGAGACAGTGCAACGATTACTGCCTGTCT TATGTCAGGCCCATGGCCTTACTCCTGAGCAAGTCGTAGCTATCGCCAGCAACATAGG TGGGAAACAGGCCCTGGAAACCGTACAACGTCTCCTCCCAGTACTTTGTCAAGCACAC GGGTTGACACCGGAACAAGTGGTGGCGATTGCGTCCAACGGCGGAGGCAAGCAGGCA ACCGTCCAACGGCTTCTTCCGGTTCTTTGCCAGGCTCATGGGCTCACGCCAG AGCAGGTGGTAGCAATAGCGTCGAACATCGGTGGTAAGCAAGCGCTTGAAACGGTCC AGCGTCTTCTGCCGGTGTTGTGCCAGGCGCACGGACTCACACCAGAACAAGTGGTTGC TATTGCTAGTAACAACGGTGGAAAGCAGGCCCTCGAGACGGTGCAGAGGTTACTTCCC GTCCTCTGTCAAGCGCACGGCCTCACTCCAGAGCAAGTGGTTGCGATCGCTTCAAACA ATGGTGGAAGACCTGCCCTGGAA, or a sequence having at least 90% sequence identity to the TALE ce, wherein the TALEN is expressed, and wherein the TALEN cleaves the target DNA to produce altered DNA in the cell. 29. A method of altering target DNA in a cell comprising combining within a cell a TALEN lacking repeat sequences 100 bp or longer and a donor nucleic acid sequence wherein the TALEN cleaves the target DNA and the donor nucleic acid sequence is inserted into the DNA in the cell.

. The method of paragraph 29 wherein the cell oes ologous end joining to produce altered DNA in the cell. 31. The method of aph 29 wherein the cell undergoes homologous recombination to produced altered DNA in the cell. 32. The method of paragraph 29 wherein the TALEN lacks repeat sequences 90 bp or . 33. The method of paragraph 29 wherein the TALEN lacks repeat sequences 80 bp or longer. 34. The method of paragraph 29 wherein the TALEN lacks repeat sequences 70 bp or longer.

. The method of paragraph 29 wherein the TALEN lacks repeat sequences 60 bp or longer. 36. The method of paragraph 29 n the TALEN lacks repeat sequences 50 bp or longer. 37. The method of paragraph 29 wherein the TALEN lacks repeat sequences 40 bp or longer. 38. The method of paragraph 29 wherein the TALEN lacks repeat sequences 30 bp or longer. 39. The method of paragraph 29 n the TALEN lacks repeat sequences 20 bp or longer. 40. The method of paragraph 29 wherein the TALEN lacks repeat sequences 19 bp or longer. 41. The method of paragraph 29 wherein the TALEN lacks repeat sequences 18 bp or longer. 42. The method of paragraph 29 wherein the TALEN lacks repeat sequences 17 bp or longer. 43. The method of aph 29 wherein the TALEN lacks repeat sequences 16 bp or longer. 44. The method of paragraph 29 wherein the TALEN lacks repeat sequences 15 bp or longer. 45. The method of paragraph 29 wherein the TALEN lacks repeat sequences 14 bp or longer. 46. The method of paragraph 29 wherein the TALEN lacks repeat sequences 13 bp or longer. 47. The method of paragraph 29 wherein the TALEN lacks repeat sequences 12 bp or longer. 48. The method of aph 29 wherein the TALEN lacks repeat ces 11 bp or longer. 48. The method of paragraph 29 wherein the TALEN lacks repeat sequences 10 bp or longer. 50. The method of paragraph 29 wherein the cell is a eukaryotic cell. 51. The method of paragraph 29 wherein the cell is a yeast cell, a plant cell or an animal cell. 52. The method of paragraph 29 n the cell is a somatic cell. 53. The method of paragraph 29 wherein the cell is a stem cell. 54. The method of paragraph 29 wherein the cell is a human stem cell. 55. The method of paragraph 29 comprising introducing into the cell a first foreign nucleic acid encoding the TALEN, wherein the TALEN is expressed, and wherein the TALEN cleaves the target DNA to produce altered DNA in the cell. 56. The method of aph 29 comprising introducing into the cell a virus including a first foreign nucleic acid encoding the TALEN, wherein the TALEN is expressed, and wherein the TALEN cleaves the target DNA to produce altered DNA in the cell. 57. The method of paragraph 29 comprising introducing into the cell a first n nucleic acid encoding the TALEN having a TALE CTAACCCCTGAACAGGTAGTCGCTATAGCTTCAAATATCGGGGGCAAGCAAGC ACTTGAGACCGTTCAACGACTCCTGCCAGTGCTCTGCCAAGCCCATGGATTGACTCCG GAGCAAGTCGTCGCGATCGCGAGCAACGGCGGGGGGAAGCAGGCGCTGGAAACTGTT CAGAGACTGCTGCCTGTACTTTGTCAGGCGCATGGTCTCACCCCCGAACAGGTTGTCG CAATAGCAAGTAATATAGGCGGTAAGCAAGCCCTAGAGACTGTGCAACGCCTGCTCC CCGTGCTGTGTCAGGCTCACGGTCTGACACCTGAACAAGTTGTCGCGATAGCCAGTCA CGACGGGGGAAAACAAGCTCTAGAAACGGTTCAAAGGTTGTTGCCCGTTCTGTGCCAA GCACATGGGTTAACACCCGAACAAGTAGTAGCGATAGCGTCAAATAACGGGGGTAAA CAGGCTTTGGAGACGGTACAGCGGTTATTGCCGGTCCTCTGCCAGGCCCACGGACTTA CGCCAGAACAGGTGGTTGCAATTGCCTCCAACATCGGCGGGAAACAAGCGTTGGAAA CTGTGCAGAGACTCCTTCCTGTTTTGTGTCAAGCCCACGGCTTGACGCCTGAGCAGGTT GTGGCCATCGCTAGCCACGACGGAGGGAAGCAGGCTCTTGAAACCGTACAGCGACTT CTCCCAGTTTTGTGCCAAGCTCACGGGCTAACCCCCGAGCAAGTAGTTGCCATAGCAA GCAACGGAGGAGGAAAACAGGCATTAGAAACAGTTCAGCGCTTGCTCCCGGTACTCT GTCAGGCACACGGTCTAACTCCGGAACAGGTCGTAGCCATTGCTTCCCATGATGGCGG CAAACAGGCGCTAGAGACAGTCCAGAGGCTCTTGCCTGTGTTATGCCAGGCACATGGC CTCACCCCGGAGCAGGTCGTTGCCATCGCCAGTAATATCGGCGGAAAGCAAGCTCTCG AAACAGTACAACGGCTGTTGCCAGTCCTATGTCAAGCTCATGGACTGACGCCCGAGCA GGTAGTGGCAATCGCATCTCACGATGGAGGTAAACAAGCACTCGAGACTGTCCAAAG ATTGTTACCCGTACTATGCCAAGCGCATGGTTTAACCCCAGAGCAAGTTGTGGCTATT GCATCTAACGGCGGTGGCAAACAAGCCTTGGAGACAGTGCAACGATTACTGCCTGTCT TATGTCAGGCCCATGGCCTTACTCCTGAGCAAGTCGTAGCTATCGCCAGCAACATAGG TGGGAAACAGGCCCTGGAAACCGTACAACGTCTCCTCCCAGTACTTTGTCAAGCACAC GGGTTGACACCGGAACAAGTGGTGGCGATTGCGTCCAACGGCGGAGGCAAGCAGGCA CTGGAGACCGTCCAACGGCTTCTTCCGGTTCTTTGCCAGGCTCATGGGCTCACGCCAG AGCAGGTGGTAGCAATAGCGTCGAACATCGGTGGTAAGCAAGCGCTTGAAACGGTCC AGCGTCTTCTGCCGGTGTTGTGCCAGGCGCACGGACTCACACCAGAACAAGTGGTTGC TATTGCTAGTAACAACGGTGGAAAGCAGGCCCTCGAGACGGTGCAGAGGTTACTTCCC GTCCTCTGTCAAGCGCACGGCCTCACTCCAGAGCAAGTGGTTGCGATCGCTTCAAACA ATGGTGGAAGACCTGCCCTGGAA, or a ce having at least 90% sequence identity to the TALE sequence, wherein the TALEN is expressed, and wherein the TALEN cleaves the target DNA to produce altered DNA in the cell. 58. The method of paragraph 29 sing introducing into the cell a virus including a first foreign nucleic acid encoding the TALEN having a TALE sequence CCTGAACAGGTAGTCGCTATAGCTTCAAATATCGGGGGCAAGCAAGC ACTTGAGACCGTTCAACGACTCCTGCCAGTGCTCTGCCAAGCCCATGGATTGACTCCG GAGCAAGTCGTCGCGATCGCGAGCAACGGCGGGGGGAAGCAGGCGCTGGAAACTGTT CAGAGACTGCTGCCTGTACTTTGTCAGGCGCATGGTCTCACCCCCGAACAGGTTGTCG CAAGTAATATAGGCGGTAAGCAAGCCCTAGAGACTGTGCAACGCCTGCTCC CCGTGCTGTGTCAGGCTCACGGTCTGACACCTGAACAAGTTGTCGCGATAGCCAGTCA CGACGGGGGAAAACAAGCTCTAGAAACGGTTCAAAGGTTGTTGCCCGTTCTGTGCCAA GGGTTAACACCCGAACAAGTAGTAGCGATAGCGTCAAATAACGGGGGTAAA CAGGCTTTGGAGACGGTACAGCGGTTATTGCCGGTCCTCTGCCAGGCCCACGGACTTA CGCCAGAACAGGTGGTTGCAATTGCCTCCAACATCGGCGGGAAACAAGCGTTGGAAA CTGTGCAGAGACTCCTTCCTGTTTTGTGTCAAGCCCACGGCTTGACGCCTGAGCAGGTT GTGGCCATCGCTAGCCACGACGGAGGGAAGCAGGCTCTTGAAACCGTACAGCGACTT CTCCCAGTTTTGTGCCAAGCTCACGGGCTAACCCCCGAGCAAGTAGTTGCCATAGCAA GCAACGGAGGAGGAAAACAGGCATTAGAAACAGTTCAGCGCTTGCTCCCGGTACTCT GTCAGGCACACGGTCTAACTCCGGAACAGGTCGTAGCCATTGCTTCCCATGATGGCGG CAAACAGGCGCTAGAGACAGTCCAGAGGCTCTTGCCTGTGTTATGCCAGGCACATGGC CTCACCCCGGAGCAGGTCGTTGCCATCGCCAGTAATATCGGCGGAAAGCAAGCTCTCG AAACAGTACAACGGCTGTTGCCAGTCCTATGTCAAGCTCATGGACTGACGCCCGAGCA GGTAGTGGCAATCGCATCTCACGATGGAGGTAAACAAGCACTCGAGACTGTCCAAAG ATTGTTACCCGTACTATGCCAAGCGCATGGTTTAACCCCAGAGCAAGTTGTGGCTATT GCATCTAACGGCGGTGGCAAACAAGCCTTGGAGACAGTGCAACGATTACTGCCTGTCT AGGCCCATGGCCTTACTCCTGAGCAAGTCGTAGCTATCGCCAGCAACATAGG TGGGAAACAGGCCCTGGAAACCGTACAACGTCTCCTCCCAGTACTTTGTCAAGCACAC GGGTTGACACCGGAACAAGTGGTGGCGATTGCGTCCAACGGCGGAGGCAAGCAGGCA CTGGAGACCGTCCAACGGCTTCTTCCGGTTCTTTGCCAGGCTCATGGGCTCACGCCAG AGCAGGTGGTAGCAATAGCGTCGAACATCGGTGGTAAGCAAGCGCTTGAAACGGTCC AGCGTCTTCTGCCGGTGTTGTGCCAGGCGCACGGACTCACACCAGAACAAGTGGTTGC TATTGCTAGTAACAACGGTGGAAAGCAGGCCCTCGAGACGGTGCAGAGGTTACTTCCC GTCCTCTGTCAAGCGCACGGCCTCACTCCAGAGCAAGTGGTTGCGATCGCTTCAAACA ATGGTGGAAGACCTGCCCTGGAA, or a sequence having at least 90% sequence identity to the TALE sequence, n the TALEN is expressed, and wherein the TALEN cleaves the target DNA to produce altered DNA in the cell. 59. A virus ing a nucleic acid sequence encoding a TALEN lacking repeat sequences 100 bp or longer. 60. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 90 bp or longer. 61. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 80 bp or longer. 62. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 70 bp or longer. 63. The virus of paragraph 59 wherein the TALEN lacks repeat ces 60 bp or . 64. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 50 bp or longer. 65. The virus of paragraph 59 n the TALEN lacks repeat sequences 40 bp or longer. 66. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 30 bp or longer. 67. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 20 bp or longer. 68. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 19 bp or longer. 69. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 18 bp or longer. 70. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 17 bp or longer. 71. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 16 bp or longer. 72. The virus of paragraph 59 wherein the TALEN lacks repeat ces 15 bp or . 73. The virus of aph 59 wherein the TALEN lacks repeat sequences 14 bp or longer. 74. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 13 bp or longer. 75. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 12 bp or longer. 76. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 11 bp or longer. 77. The virus of paragraph 59 wherein the TALEN lacks repeat sequences 10 bp or longer. 78. The virus of paragraph 59 being a lentivirus. 79. A cell including a nucleic acid sequence encoding a TALEN lacking repeat sequences 100 bp or longer. 80. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 90 bp or longer. 81. The cell of paragraph 70 wherein the TALEN lacks repeat ces 80 bp or longer. 82. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 70 bp or longer. 83. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 60 bp or longer. 84. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 50 bp or longer. 85. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 40 bp or longer. 86. The cell of paragraph 70 wherein the TALEN lacks repeat ces 30 bp or . 87. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 20 bp or longer. 88. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 19 bp or longer. 89. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 18 bp or . 90. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 17 bp or longer. 91. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 16 bp or longer. 92. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 15 bp or longer. 93. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 14 bp or longer. 94. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 13 bp or longer. 95. The cell of paragraph 70 wherein the TALEN lacks repeat ces 12 bp or longer. 96. The cell of aph 70 wherein the TALEN lacks repeat sequences 11 bp or longer. 97. The cell of paragraph 70 wherein the TALEN lacks repeat sequences 10 bp or longer 98. The cell of aph 70 being a eukaryotic cell. 99. The cell of paragraph 70 being a yeast cell, a plant cell or an animal cell. 100. The cell of aph 70 being a somatic cell. 101. The cell of paragraph 70 being a stem cell. 102. The cell of paragraph 70 being a human stem cell. 103. A method of making a TALE comprising combining an clease, a DNA polymerase, a DNA ligase, an exonuclease, a plurality of nucleic acid dimer blocks encoding repeat variable diresidue domains and a TALE-N/TF ne vector including an endonuclease cutting site, activating the endonuclease to cut the TALE-N/TF backbone vector at the endonuclease cutting site to produce a first end and a second end, activating the exonuclease to create a 3’ and a 5’ overhang on the TALE-N/TF backbone vector and the plurality of c acid dimer blocks and to anneal the TALE-N/TF backbone vector and the plurality of nucleic acid dimer blocks in a desired order, activating the DNA rase and the DNA ligase to connect the TALE-N/TF backbone vector and the plurality of nucleic acid dimer blocks. 104. A method of altering target DNA in a stem cell expressing an enzyme that forms a colocalization complex with RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner comprising (a) introducing into the stem cell a first foreign nucleic acid encoding an RNA complementary to the target DNA and which guides the enzyme to the target DNA, wherein the RNA and the enzyme are members of a alization complex for the target DNA, introducing into the stem cell a second foreign nucleic acid encoding a donor nucleic acid sequence, n the RNA and the donor nucleic acid sequences are expressed, wherein the RNA and the enzyme co-localize to the target DNA, the enzyme cleaves the target DNA and the donor nucleic acid is inserted into the target DNA to produce altered DNA in the stem cell. 105. The method of paragraph 104 wherein the enzyme is an RNA-guided DNA binding protein. 106. The method of paragraph 104 n the enzyme is an RNA-guided DNA binding protein of a Type II CRISPR system. 107. The method of paragraph 104 wherein the enzyme is Cas9. 108. The method of paragraph 104 wherein the RNA is between about 10 to about 500 nucleotides. 109. The method of paragraph 104 n the RNA is between about 20 to about 100 nucleotides. 110. The method of paragraph 104 wherein the RNA is a guide RNA. 111. The method of paragraph 104 wherein the RNA is a tracrRNA-crRNA fusion. 112. The method of paragraph 104 wherein the DNA is genomic DNA, mitochondrial DNA, viral DNA, or exogenous DNA. 113. The method of paragraph 104 wherein the donor nucleic acid sequence is inserted by recombination. 114. The method of paragraph 104 n the donor nucleic acid sequence is inserted by homologous recombination. 115. The method of paragraph 104 wherein the donor nucleic acid sequence is ed by nonhomologous end g. 116. The method of paragraph 104 wherein the RNA and the donor nucleic acid sequences are present on one or more plasmids. 117. The method of paragraph 104 further comprising repeating step (a) multiple times to produce multiple alterations to the DNA in the cell. 118. The method of paragraph 104 wherein after producing d DNA in a stem cell, a nucleic acid encoding the enzyme that forms a co-localization x with RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner is removed from the stem cell . 119. The method of aph 104 wherein the RNA and the donor nucleic acid sequences are expressed as a bound nucleic acid sequence. 120. A stem cell including a first foreign nucleic acid encoding for an enzyme that forms a co- localization complex with RNA complementary to target DNA and that cleaves the target DNA in a site ic manner. 121. The stem cell of paragraph 120 r including a second foreign nucleic acid encoding for an RNA complementary to the target DNA and which guides the enzyme to the target DNA, wherein the RNA and the enzyme are members of a co-localization complex for the target DNA. 122. The stem cell of paragraph 121 further including a third foreign nucleic acid ng a donor nucleic acid sequence. 123. The stem cell of paragraph 120 further including an inducible promoter for promoting expression of the enzyme. 124. The stem cell of aph 120 wherein the first foreign nucleic acid is removable from genomic DNA of the cell using a transposase. 125. The stem cell of paragraph 120 wherein the enzyme is an RNA-guided DNA binding protein. 126. The stem cell of paragraph 120 wherein the enzyme is an RNA-guided DNA binding protein of a Type II CRISPR system. 127. The stem cell of paragraph 120 wherein the enzyme is Cas9. 128. The stem cell of paragraph 120 wherein the RNA is between about 10 to about 500 nucleotides. 129. The stem cell of paragraph 120 wherein the RNA is between about 20 to about 100 nucleotides. 130. The stem cell of paragraph 120 wherein the RNA is a guide RNA. 131. The stem cell of paragraph 120 wherein the RNA is a tracrRNA-crRNA . 132. The stem cell of paragraph 120 n the target DNA is genomic DNA, mitochondrial DNA, viral DNA, or exogenous DNA. 133. A cell including a first n nucleic acid encoding for an enzyme that forms a colocalization complex with RNA complementary to target DNA and that cleaves the target DNA in a site specific manner and including an inducible promoter for promoting expression of the enzyme. 134. The cell of paragraph 133 further including a second foreign nucleic acid ng for an RNA complementary to the target DNA and which guides the enzyme to the target DNA, wherein the RNA and the enzyme are members of a co-localization complex for the target DNA. 135. The stem cell of paragraph 134 further including a third n nucleic acid encoding a donor nucleic acid sequence. 136. A cell including a first n nucleic acid encoding for an enzyme that forms a colocalization complex with RNA complementary to target DNA and that cleaves the target DNA in a site specific manner, wherein the first foreign nucleic acid is removable from genomic DNA of the cell using a transposase. 137. The cell of paragraph 136 further including a second foreign nucleic acid encoding for an RNA complementary to the target DNA and which guides the enzyme to the target DNA, wherein the RNA and the enzyme are members of a co-localization x for the target DNA. 138. The stem cell of paragraph 137 r including a third n nucleic acid encoding a donor nucleic acid sequence. 139. A cell including a first foreign nucleic acid encoding for an enzyme that forms a co- localization complex with RNA complementary to target DNA and that cleaves the target DNA in a site ic manner, wherein the first foreign nucleic acid is reversibly inserted into genomic DNA of the cell. 140. The cell of aph 139 further including a second foreign nucleic acid encoding for an RNA complementary to the target DNA and which guides the enzyme to the target DNA, wherein the RNA and the enzyme are members of a co-localization complex for the target DNA. 141. The stem cell of paragraph 140 further including a third foreign nucleic acid ng a donor nucleic acid sequence. 142. A method of altering target DNA in a cell expressing an enzyme that forms a lization complex with RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner comprising (a) introducing into the cell a first foreign nucleic acid encoding a donor nucleic acid sequence, introducing into the cell from media surrounding the cell an RNA complementary to the target DNA and which guides the enzyme to the target DNA, wherein the RNA and the enzyme are members of a co-localization complex for the target DNA, wherein the donor c acid sequence is expressed, wherein the RNA and the enzyme co-localize to the target DNA, the enzyme cleaves the target DNA and the donor c acid is inserted into the target DNA to produce altered DNA in the cell. 143. The method of paragraph 142 wherein the RNA includes a 5’ Cap structure. 144. The method of paragraph 142 wherein the RNA lacks phosphate groups. 145. The method of paragraph 142 n the enzyme is an RNA-guided DNA binding protein. 146. The method of paragraph 142 wherein the enzyme is an RNA-guided DNA binding protein of a Type II CRISPR system. 147. The method of paragraph 142 wherein the enzyme is Cas9. 148. The method of paragraph 142 wherein the RNA is between about 10 to about 500 nucleotides. 149. The method of aph 142 wherein the RNA is between about 20 to about 100 nucleotides. 150. The method of paragraph 142 wherein the RNA is a guide RNA. 151. The method of paragraph 142 wherein the RNA is a tracrRNA-crRNA fusion. 152. The method of paragraph 142 wherein the DNA is genomic DNA, ondrial DNA, viral DNA, or ous DNA. 153. The method of paragraph 142 wherein the donor nucleic acid sequence is inserted by recombination. 154. The method of paragraph 142 wherein the donor nucleic acid sequence is inserted by homologous recombination. 155. The method of aph 142 n the donor nucleic acid sequence is inserted by nonhomologous end joining. 156. The method of paragraph 142 further comprising repeating step (a) multiple times to produce multiple alterations to the DNA in the cell. 157. The method of paragraph 142 wherein after producing altered DNA in a cell, a nucleic acid encoding the enzyme that forms a alization complex with RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner is removed from the cell genome. 158. The method of paragraph 142 wherein the RNA and the donor nucleic acid sequences are expressed as a bound nucleic acid sequence.

Claims (14)

Claims:

1. An in vitro or ex-vivo method of altering target DNA in a cell wherein the cell is genetically modified to include a nucleic acid encoding a Cas9 enzyme, in the genomic DNA of the cell, that forms a co-localization complex with a guide RNA mentary to the target DNA and 5 that cleaves the target DNA in a site specific manner sing (a) introducing into the cell a donor nucleic acid sequence, introducing into the cell from media surrounding the cell a guide RNA complementary to the target DNA and which guides the Cas9 enzyme to the target DNA, n the guide RNA comprises phosphatase treated guide RNA provided to the cell from nding media that is 10 continuously supplemented with the phosphatase treated guide RNA to allow uous target DNA editing, and wherein the guide RNA and the Cas9 enzyme are members of a co-localization x for the target DNA, wherein the guide RNA and the Cas9 enzyme co-localize to the target DNA, the Cas9 enzyme cleaves the target DNA and the donor nucleic acid is inserted into the target DNA to 15 produce altered DNA in the cell, and wherein the cell in not a totipotent or germline human cell.

2. The method of claim 1 wherein the guide RNA includes a 5’ Cap structure. 20

3. The method of claim 1 wherein the guide RNA lacks phosphate groups.

4. The method of claim 1 wherein the guide RNA is between about 10 to about 500 nucleotides. 25

5. The method of claim 1 wherein the guide RNA is between about 20 to about 100 nucleotides.

6. The method of claim 1 n the guide RNA is a tracrRNA-crRNA fusion. 30

7. The method of claim 1 wherein the DNA is genomic DNA, mitochondrial DNA, viral DNA, or exogenous DNA.

8. The method of claim 1 wherein the donor nucleic acid sequence is inserted by recombination.

9. The method of claim 1 wherein the donor nucleic acid sequence is inserted by homologous recombination.

10. The method of claim 1 wherein the donor nucleic acid sequence is inserted by 5 nonhomologous end joining.

11. The method of claim 1 further comprising repeating step (a) multiple times to e multiple alterations to the DNA in the cell. 10

12. The method of claim 1 wherein after producing altered DNA in a cell, a nucleic acid encoding the Cas9 enzyme that forms a co-localization complex with the guide RNA complementary to the target DNA and that cleaves the target DNA in a site specific manner is removed from the cell . 15

13. The method of claim 1 n the RNA and the donor nucleic acid sequences are expressed as a bound c acid sequence.

14. A method as claimed in any one of claims 1-13 substantially as described herein and with reference to any example thereof. tGFP Donor \\\\\\\\\