| Autor: |
Mathony, Jan, Harteveld, Zander, Schmelas, Carolin, zu Belzen, Julius Upmeier, Aschenbrenner, Sabine, Sun, Wei, Hoffmann, Mareike D., Stengl, Christina, Scheck, Andreas, Georgeon, Sandrine, Rosset, Stephane, Wang, Yanli, Grimm, Dirk, Eils, Roland, Correia, Bruno E., Niopek, Dominik |
| Předmět: |
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| Popis: |
Anti-CRISPR (Acr) proteins are powerful tools to control CRISPR-Cas technologies. However, the available Acr repertoire is limited to naturally occurring variants. Here, we applied structure-based design on AcrIIC1, a broad-spectrum CRISPR-Cas9 inhibitor, to improve its efficacy on different targets. We first show that inserting exogenous protein domains into a selected AcrIIC1 surface site dramatically enhances inhibition of Neisseria meningitidis (Nme)Cas9. Then, applying structure-guided design to the Cas9-binding surface, we converted AcrIIC1 into AcrIIC1X, a potent inhibitor of the Staphylococcus aureus (Sau)Cas9, an orthologue widely applied for in vivo genome editing. Finally, to demonstrate the utility of AcrIIC1X for genome engineering applications, we implemented a hepatocyte-specific SauCas9 ON-switch by placing AcrIIC1X expression under regulation of microRNA-122. Our work introduces designer Acrs as important biotechnological tools and provides an innovative strategy to safeguard CRISPR technologies. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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