Abstract:
BACKGROUND:CRISPR-Cas systems have been broadly embraced as effective tools for genome engineering applications, with most studies to date utilizing the Streptococcus pyogenes Cas9. Here we characterize and manipulate the smaller, 1053 amino acid nuclease Staphylococcus aureus Cas9. RESULTS:We find that the S. aureus Cas9 recognizes an NNGRRT protospacer adjacent motif (PAM) and cleaves target DNA at high efficiency with a variety of guide RNA (gRNA) spacer lengths. When directed against genomic targets with mutually permissive NGGRRT PAMs, the S. pyogenes Cas9 and S. aureus Cas9 yield indels at comparable rates. We additionally show D10A and N580A paired nickase activity with S. aureus Cas9, and we further package it with two gRNAs in a single functional adeno-associated virus (AAV) vector. Finally, we assess comparative S. pyogenes and S. aureus Cas9 specificity using GUIDE-seq. CONCLUSION:Our results reveal an S. aureus Cas9 that is effective for a variety of genome engineering purposes, including paired nickase approaches and all-in-one delivery of Cas9 and multiple gRNA expression cassettes with AAV vectors.
journal_name
Genome Bioljournal_title
Genome biologyauthors
Friedland AE,Baral R,Singhal P,Loveluck K,Shen S,Sanchez M,Marco E,Gotta GM,Maeder ML,Kennedy EM,Kornepati AV,Sousa A,Collins MA,Jayaram H,Cullen BR,Bumcrot Ddoi
10.1186/s13059-015-0817-8subject
Has Abstractpub_date
2015-11-24 00:00:00pages
257eissn
1474-7596issn
1474-760Xpii
10.1186/s13059-015-0817-8journal_volume
16pub_type
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