Publication Date:
2016-01-07
Description:
CRISPR-Cas9 nucleases are widely used for genome editing but can induce unwanted off-target mutations. Existing strategies for reducing genome-wide off-target effects of the widely used Streptococcus pyogenes Cas9 (SpCas9) are imperfect, possessing only partial or unproven efficacies and other limitations that constrain their use. Here we describe SpCas9-HF1, a high-fidelity variant harbouring alterations designed to reduce non-specific DNA contacts. SpCas9-HF1 retains on-target activities comparable to wild-type SpCas9 with 〉85% of single-guide RNAs (sgRNAs) tested in human cells. Notably, with sgRNAs targeted to standard non-repetitive sequences, SpCas9-HF1 rendered all or nearly all off-target events undetectable by genome-wide break capture and targeted sequencing methods. Even for atypical, repetitive target sites, the vast majority of off-target mutations induced by wild-type SpCas9 were not detected with SpCas9-HF1. With its exceptional precision, SpCas9-HF1 provides an alternative to wild-type SpCas9 for research and therapeutic applications. More broadly, our results suggest a general strategy for optimizing genome-wide specificities of other CRISPR-RNA-guided nucleases.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kleinstiver, Benjamin P -- Pattanayak, Vikram -- Prew, Michelle S -- Tsai, Shengdar Q -- Nguyen, Nhu T -- Zheng, Zongli -- Joung, J Keith -- DP1 GM105378/DP/NCCDPHP CDC HHS/ -- R01 GM088040/GM/NIGMS NIH HHS/ -- R01 GM107427/GM/NIGMS NIH HHS/ -- England -- Nature. 2016 Jan 28;529(7587):490-5. doi: 10.1038/nature16526. Epub 2016 Jan 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Pathology Unit, Center for Cancer Research, and Center for Computational and Integrative Biology, Massachusetts General Hospital, Charlestown, Massachusetts 02129, USA. ; Department of Pathology, Harvard Medical School, Boston, Massachusetts 02115, USA. ; Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26735016" target="_blank"〉PubMed〈/a〉
Keywords:
Base Sequence
;
CRISPR-Associated Proteins/*genetics/*metabolism
;
CRISPR-Cas Systems/*physiology
;
Clustered Regularly Interspaced Short Palindromic Repeats/*genetics
;
DNA/genetics/metabolism
;
DNA-Binding Proteins/genetics/metabolism
;
Endonucleases/genetics/*metabolism
;
*Genetic Engineering
;
Genome, Human/*genetics
;
Humans
;
Mutation
;
Protein Binding
;
RNA/genetics
;
Reproducibility of Results
;
Sequence Analysis, DNA
;
Streptococcus pyogenes/enzymology/genetics
;
Substrate Specificity
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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