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Efficient multiplex genome editing using CRISPR-Mb3Cas12a in mice

Wang, Z.; Wang, Y.; Wang, S.; Gorzalski, A. J.; McSwiggin, H.; Yu, T.; Castaneda-Garcia, K.; Zheng, H.; Yan, W.

2019-08-10 genomics
10.1101/731646 bioRxiv
Show abstract

Despite many advantages over Cas9, Cas12a has not been widely used in genome editing in mammalian cells largely due to its strict requirement of the TTTV protospacer adjacent motif (PAM) sequence. Here, we report that Mb3Cas12a (Moraxella bovoculi AAX11_00205) could edit the genome in murine zygotes independent of TTTV PAM sequences and with minimal on-target mutations and close to 100% editing efficiency when crRNAs of 23nt spacers were used.\n\nSummary statementCRISPR-Mb3Cas12a can target a broader range of sequences in murine zygotes compared to AsCas12a and LbCas12a, and has lower on-target effects than Cas9 and high overall knock-in efficiency.

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