1. Repurposing the Homing Endonuclease I-SceI for Positive Selection and Development of Gene-Editing Technologies
- Author
-
Kok Zhi Lee, Michael A. Mechikoff, Mrugesh Krishna Parasa, Tyler J. Rankin, Paula Pandolfi, Kevin S. Fitzgerald, Ethan T. Hillman, and Kevin V. Solomon
- Subjects
Gene Editing ,Saccharomyces cerevisiae Proteins ,Escherichia coli ,Biomedical Engineering ,Deoxyribonuclease I ,General Medicine ,Deoxyribonucleases, Type II Site-Specific ,Biochemistry, Genetics and Molecular Biology (miscellaneous) - Abstract
Prokaryote genomes encode diverse programmable DNA endonucleases with significant potential for biotechnology and gene editing. However, these endonucleases differ significantly in their properties, which must be screened and measured. While positive selection screens based on ccdB and barnase have been developed to evaluate such proteins, their high levels of toxicity make them challenging to use. Here, we develop and validate a more robust positive selection screen based on the homing endonuclease I-SceI. Candidate endonucleases target and cure the I-SceI expression plasmid preventing induction of I-SceI-mediated double strand DNA breaks that lead to cell death in
- Published
- 2022