Chromatin accessibility and guide sequence secondary structure affect CRISPR ‐Cas9 gene editing efficiency
Open accessAbstract
Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)-associated protein 9 (CRISPR-Cas9) systems have emerged as the method of choice for genome editing, but large variations in on-target efficiencies continue to limit their applicability. Here, we investigate the effect of chromatin accessibility on Cas9-mediated gene editing efficiency for 20 gRNAs targeting 10 genomic loci in HEK293T cells using both SpCas9 and the eSpCas9(1.1) variant. Our study indicates that gene editing is more efficient in euchromatin than in heterochromatin, and we validate this finding in HeLa cells and in human fibroblasts. Furthermore, we investigate the gRNA sequence determinants of CRISPR-Cas9 activity using a surrogate reporter system and find that the efficiency of Cas9-mediated gene editing is dependent on guide sequence secondary structure formation. This knowledge can aid in the further improvement of tools for gRNA design.
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Accessibility of chromatin at editing sites influences the efficiency of CRISPR-Cas9.
“It is previously established that the accessibility of chromatin at editing sites influences the efficiency of CRISPR-Cas9.”
From Machine learning-based prediction models to guide the selection of Cas9 variants for efficient gene editing (2024) · cites this paper as [57]
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- Authors
- Jensen, K. T., Fløe, L., Petersen, T. S., Huang, J., Xu, F., Bolund, L., Luo, Y., & Lin, L.
- Affiliations
- Aarhus University (DK)
- BGI Group (China) (CN)
- Corresponding author
- Luo, Yonglun
- Lin, Lin
- Venue
- FEBS Letters
- Publisher
- Wiley
- Published
- 2017-06-28
- Volume
- 591
- Issue
- 13
- Pages
- 1892-1901
- ISSN
- 0014-5793 (ISSN-L)
- 1873-3468
- OpenAlex
- W2623793810
- Cited by
- 225
- References
- 25
- Citations by year
- 2026: 21 · 2025: 21 · 2024: 27 · 2023: 27 · 2022: 29 · 2021: 28 · 2020: 28 · 2019: 29 · 2018: 11 · 2017: 4
- FWCI
- 8.04
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- FEBS Letters (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Lundbeckfonden (R173‐2014‐1105, R151‐2013‐14439, R219‐2016‐1375)
- 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, genome editing efficiency, chromatin accessibility, SpCas9, heterochromatin, euchromatin, sgRNA design, HEK293T cells, HeLa cells, human fibroblasts
- MeSH terms
- Gene Editing, Chromatin, HeLa Cells, Humans, Point Mutation, Genomics, DNA Cleavage, Genetic Loci, HEK293 Cells, CRISPR-Cas Systems
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