A compact Cas9 ortholog from Staphylococcus Auricularis (SauriCas9) expands the DNA targeting scope
Open Access
- 30 March 2020
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLoS Biology
- Vol. 18 (3), e3000686
- https://doi.org/10.1371/journal.pbio.3000686
Abstract
Compact CRISPR/Cas9 systems that can be packaged into an adeno-associated virus (AAV) hold great promise for gene therapy. Unfortunately, currently available small Cas9 nucleases either display low activity or require a long protospacer adjacent motif (PAM) sequence, limiting their extensive applications. Here, we screened a panel of Cas9 nucleases and identified a small Cas9 ortholog from Staphylococcus auricularis (SauriCas9), which recognizes a simple NNGG PAM, displays high activity for genome editing, and is compact enough to be packaged into an AAV for genome editing. Moreover, the conversion of adenine and cytosine bases can be achieved by fusing SauriCas9 to the cytidine and adenine deaminase. Therefore, SauriCas9 holds great potential for both basic research and clinical applications.Keywords
Funding Information
- National Natural Science Foundation of China (81870199)
- Innovative Research Group Project of the National Natural Science Foundation of China (31521003)
- State Key Laboratory Opening Program (SKLGE1809)
- National Institutes of Health (R00HL130416)
- Fundamental Research Funds for Central Universities of the Central South University (CAFYBB2017MA018)
- National Natural Science Foundation of China (31700571)
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