PreprintCited by 209CRISPR and Genetic EngineeringRNA regulation and diseaseRNA Interference and Gene Delivery

Genome-wide target specificities of CRISPR-Cas9 nucleases revealed by multiplex Digenome-seq

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Kim, Daesik, Kim, Sojung, Kim, Sunghyun, Park, Jeongbin, Kim, Jin-Soo·2016·Genome Research

Abstract

We present multiplex Digenome-seq to profile genome-wide specificities of up to 11 CRISPR-Cas9 nucleases simultaneously, saving time and reducing cost. Cell-free human genomic DNA was digested using multiple sgRNAs combined with the Cas9 protein and then subjected to whole-genome sequencing. In vitro cleavage patterns, characteristic of on- and off-target sites, were computationally identified across the genome using a new DNA cleavage scoring system. We found that many false-positive, bulge-type off-target sites were cleaved by sgRNAs transcribed from an oligonucleotide duplex but not by those transcribed from a plasmid template. Multiplex Digenome-seq captured many bona fide off-target sites, missed by other genome-wide methods, at which indels were induced at frequencies <0.1%. After analyzing 964 sites cleaved in vitro by these sgRNAs and measuring indel frequencies at hundreds of off-target sites in cells, we propose a guideline for the choice of target sites for minimizing CRISPR-Cas9 off-target effects in the human genome.

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  • The specificity of Cas9 activity can be enhanced by extending or truncating sgRNAs.

    “accumulative evidence showed that the specificity of Cas9 activity can be enhanced by extending or truncating sgRNAs”

    From Off-target effects in CRISPR/Cas9 gene editing (2023) · cites this paper as Kim et al., 2016

    The Results (Validation of off-target sites in cells; page unavailable) report that sgRNAs extended with two 5′ guanines were up to 598-fold more specific than conventional sgRNAs. The Discussion (page unavailable) says truncated sgRNAs can also be highly specific, but only when they target rare, sufficiently unique 17-nt sites; it does not establish that truncation itself enhances specificity relative to full-length sgRNAs. (LLM, conf=0.84)

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Authors
Kim, D., Kim, S., Kim, S., Park, J., & Kim, J.-S.
Affiliations
  • Seoul National University (KR)
  • Hanyang University (KR)
Venue
Genome Research
Published
2016-01-19
Volume
26
Issue
3
Pages
406-415
ISSN
  • 1088-9051 (ISSN-L)
  • 1549-5469
OpenAlex
W2273244674
Cited by
208
References
37
Citations by year
2026: 8 · 2025: 15 · 2024: 13 · 2023: 12 · 2022: 17 · 2021: 23 · 2020: 29 · 2019: 22 · 2018: 26 · 2017: 21 · 2016: 22
Type
posted content
Language
en
Open access
Locations
  • Genome Research (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
  • Seoul National University Open Repository (Seoul National University) (submittedVersion)
Funders
IBS (IBS-R021-D1)
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
CRISPR/Cas9, off-target effects, single guide RNA, indel frequency, target site selection, genome editing
MeSH terms
Binding Sites, Humans, Protein Binding, Reproducibility of Results, Genome, Human, Gene Targeting, Genomics, INDEL Mutation, Position-Specific Scoring Matrices, High-Throughput Nucleotide Sequencing, Nucleotide Motifs, Mutation Rate, CRISPR-Cas Systems

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