PAM-flexible genome editing with an engineered chimeric Cas9
Zhao, Lin ; Koseki, Sabrina R T ; Silverstein, Rachel A ; Amrani, Nadia ; Peng, Christina ; Kramme, Christian ; Savic, Natasha ; Pacesa, Martin ; Rodríguez, Tomás C ; Stan, Teodora ... show 10 more
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Authors
Koseki, Sabrina R T
Silverstein, Rachel A
Amrani, Nadia
Peng, Christina
Kramme, Christian
Savic, Natasha
Pacesa, Martin
Rodríguez, Tomás C
Stan, Teodora
Tysinger, Emma
Hong, Lauren
Yudistyra, Vivian
Ponnapati, Manvitha R
Jacobson, Joseph M
Church, George M
Jakimo, Noah
Truant, Ray
Jinek, Martin
Kleinstiver, Benjamin P
Sontheimer, Erik J
Chatterjee, Pranam
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UMass Chan Affiliations
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Abstract
CRISPR enzymes require a defined protospacer adjacent motif (PAM) flanking a guide RNA-programmed target site, limiting their sequence accessibility for robust genome editing applications. In this study, we recombine the PAM-interacting domain of SpRY, a broad-targeting Cas9 possessing an NRN > NYN (R = A or G, Y = C or T) PAM preference, with the N-terminus of Sc + +, a Cas9 with simultaneously broad, efficient, and accurate NNG editing capabilities, to generate a chimeric enzyme with highly flexible PAM preference: SpRYc. We demonstrate that SpRYc leverages properties of both enzymes to specifically edit diverse PAMs and disease-related loci for potential therapeutic applications. In total, the approaches to generate SpRYc, coupled with its robust flexibility, highlight the power of integrative protein design for Cas9 engineering and motivate downstream editing applications that require precise genomic positioning.
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Zhao L, Koseki SRT, Silverstein RA, Amrani N, Peng C, Kramme C, Savic N, Pacesa M, Rodríguez TC, Stan T, Tysinger E, Hong L, Yudistyra V, Ponnapati MR, Jacobson JM, Church GM, Jakimo N, Truant R, Jinek M, Kleinstiver BP, Sontheimer EJ, Chatterjee P. PAM-flexible genome editing with an engineered chimeric Cas9. Nat Commun. 2023 Oct 4;14(1):6175. doi: 10.1038/s41467-023-41829-y. PMID: 37794046; PMCID: PMC10550912.