A compact Cas9 ortholog from < i > Staphylococcus Auricularis < /i > (SauriCas9) expands the DNA targeting scope

by Ziying Hu, Shuai Wang, Chengdong Zhang, Ning Gao, Miaomiao Li, Deqian Wang, Daqi Wang, Dong Liu, Huihui Liu, Sang-Ging Ong, Hongyan Wang, Yongming Wang

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 appli cations. Here, we screened a panel of Cas9 nucleases and identified a small Cas9 ortholog fromStaphylococcus 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.

Source: PLoS Biology: Archived Table of Contents - March 29, 2020 Category: Biology Authors: Ziying Hu Source Type: research