Engineer chimeric Cas9 to expand PAM recognition based on evolutionary information View Full Text


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Article Info

DATE

2019-12

AUTHORS

Dacheng Ma, Zhimeng Xu, Zhaoyu Zhang, Xi Chen, Xiangzhi Zeng, Yiyang Zhang, Tingyue Deng, Mengfei Ren, Zheng Sun, Rui Jiang, Zhen Xie

ABSTRACT

Although Cas9 nucleases are remarkably diverse in microorganisms, the range of genomic sequences targetable by a CRISPR/Cas9 system is restricted by the requirement of a short protospacer adjacent motif (PAM) at the target site. Here, we generate a group of chimeric Cas9 (cCas9) variants by replacing the key region in the PAM interaction (PI) domain of Staphylococcus aureus Cas9 (SaCas9) with the corresponding region in a panel of SaCas9 orthologs. By using a functional assay at target sites with different nucleotide recombinations at PAM position 3-6, we identify several cCas9 variants with expanded recognition capability at NNVRRN, NNVACT, NNVATG, NNVATT, NNVGCT, NNVGTG, and NNVGTT PAM sequences. In summary, we provide a panel of cCas9 variants accessible up to 1/4 of all the possible genomic targets in mammalian cells. More... »

PAGES

560

References to SciGraph publications

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  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1038/s41467-019-08395-8

    DOI

    http://dx.doi.org/10.1038/s41467-019-08395-8

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1111911034

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/30718489


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