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Cameron, Peter; Fuller, Chris K; Donohoue, Paul D; Jones, Brittnee N; Thompson, Matthew S; Carter, Matthew M; Gradia, Scott; Vidal, Bastien; Garner, Elizabeth; Slorach, Euan M; Lau, Elaine; Banh, Lynda M; Lied, Alexandra M; Edwards, Leslie S; Settle, Alexander H; Capurso, Daniel; Llaca, Victor; Deschamps, Stéphane; Cigan, Mark; Young, Joshua K; May, Andrew P
Nature methods, 06/2017, Letnik: 14, Številka: 6Journal Article
RNA-guided CRISPR-Cas9 endonucleases are widely used for genome engineering, but our understanding of Cas9 specificity remains incomplete. Here, we developed a biochemical method (SITE-Seq), using Cas9 programmed with single-guide RNAs (sgRNAs), to identify the sequence of cut sites within genomic DNA. Cells edited with the same Cas9-sgRNA complexes are then assayed for mutations at each cut site using amplicon sequencing. We used SITE-Seq to examine Cas9 specificity with sgRNAs targeting the human genome. The number of sites identified depended on sgRNA sequence and nuclease concentration. Sites identified at lower concentrations showed a higher propensity for off-target mutations in cells. The list of off-target sites showing activity in cells was influenced by sgRNP delivery, cell type and duration of exposure to the nuclease. Collectively, our results underscore the utility of combining comprehensive biochemical identification of off-target sites with independent cell-based measurements of activity at those sites when assessing nuclease activity and specificity.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Vir: Osebne bibliografije
in: SICRIS
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