Cas9, a CRISPR-associated RNA-guided nuclease, has been rapidly adopted as a tool for biochemical and genetic manipulation of DNA. Although complexes between Cas9 and guide RNAs (gRNAs) offer remarkable specificity and versatility for genome manipulation, mis-targeted events occur. To extend the understanding of gRNA::target homology requirements, we compared mutational tolerance for a set of Cas9::gRNA complexes in vitro and in vivo (in Saccharomyces cerevisiae). A variety of gRNAs were tested with variant libraries based on four different targets (with varying GC content and sequence features). In each case, we challenged a mixture of matched and mismatched targets, evaluating cleavage activity on a wide variety of potential target sequences in parallel through high-throughput sequencing of the products retained after cleavage. These experiments evidenced notable and consistent differences between in vitro and S. cerevisiae (in vivo) Cas9 cleavage specificity profiles including (i) a greater tolerance for mismatches in vitro and (ii) a greater specificity increase in vivo with truncation of the gRNA homology regions.
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Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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Site | Modification | Modifier | Source | Reference |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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Evidence ID | Analyze ID | File | Description |
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