Cited by 265CRISPR and Genetic EngineeringRNA regulation and diseaseRNA Interference and Gene Delivery

A compact, high-accuracy Cas9 with a dinucleotide PAM for in vivo genome editing

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Edraki, Alireza, Mir, Aamir, Ibraheim, Raed, Gainetdinov, Ildar, Yoon, Yeonsoo, Song, Chun-Qing, Cao, Yueying, Gallant, Judith +3 more·2019·Molecular Cell

Abstract

CRISPR-Cas9 genome editing has transformed biotechnology and therapeutics. However, in vivo applications of some Cas9s are hindered by large size (limiting delivery by adeno-associated virus [AAV] vectors), off-target editing, or complex protospacer-adjacent motifs (PAMs) that restrict the density of recognition sequences in target DNA. Here, we exploited natural variation in the PAM-interacting domains (PIDs) of closely related Cas9s to identify a compact ortholog from Neisseria meningitidis-Nme2Cas9-that recognizes a simple dinucleotide PAM (N 4 CC) that provides for high target site density. All-in-one AAV delivery of Nme2Cas9 with a guide RNA targeting Pcsk9 in adult mouse liver produces efficient genome editing and reduced serum cholesterol with exceptionally high specificity. We further expand our single-AAV platform to pre-implanted zygotes for streamlined generation of genome-edited mice. Nme2Cas9 combines all-in-one AAV compatibility, exceptional editing accuracy within cells, and high target site density for in vivo genome editing applications.

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  • The requirement of a specific PAM sequence for targeted genome editing is crucial, and even though it reduces off-target activity, it often results in suboptimal DNA cleavage and editing efficiencies and restricts the scope of targeted editing.

    “Also, the requirement of a specific PAM Sequence for targeted genome editing is crucial, and even though it reduces off-target activity, it often results in suboptimal DNA cleavage, editing efficiencies (Ran et al., 2015; Edraki et al., 2019) and restricting the scope of targeted edition.”

    From Emerging applications of gene editing technologies for the development of climate-resilient crops (2025) · cites this paper as Edraki et al., 2019

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Authors
Edraki, A., Mir, A., Ibraheim, R., Gainetdinov, I., Yoon, Y., Song, C.-Q., Cao, Y., Gallant, J., Xue, W., Rivera-Pérez, J. A., & Sontheimer, E. J.
Affiliations
University of Massachusetts Chan Medical School (US)
Corresponding author
Sontheimer, Erik J.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2019-02
Volume
73
Issue
4
Pages
714-726.e4
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2906461396
Cited by
265
References
80
Citations by year
2026: 27 · 2025: 27 · 2024: 36 · 2023: 56 · 2022: 41 · 2021: 26 · 2020: 35 · 2019: 15 · 2018: 1
FWCI
6.81
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • The Journal of the American Medical Association (JAMA) Network (American Medical Association) (submittedVersion)
Funders
National Institutes of Health (DP2 HL137167, P01 HL131471, R01 GM115911, R01 GM125797)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA regulation and disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
Keywords
Cas9, Neisseria meningitidis, CRISPR/Cas9, in vivo gene editing, adeno-associated virus delivery, PCSK9, hypercholesterolemia, off-target editing, protospacer adjacent motif
MeSH terms
Proprotein Convertase 9, Gene Editing, CRISPR-Associated Protein 9, RNA, Guide, CRISPR-Cas Systems, Dependovirus, Animals, DNA, Embryo Transfer, Female, Genetic Vectors, Humans, Liver, Mice, Inbred C57BL, Neisseria meningitidis, Substrate Specificity, Zygote, K562 Cells, HEK293 Cells, Nucleotide Motifs, Clustered Regularly Interspaced Short Palindromic Repeats, CRISPR-Cas Systems

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