Cited by 51CRISPR and Genetic EngineeringAdvanced Fluorescence Microscopy TechniquesAdvanced biosensing and bioanalysis techniques

Fluorogenic CRISPR for genomic DNA imaging

Open access
Zhang, Zhongxuan, Rong, Xiaoxiao, Xie, Tianjin, Li, Zehao, Song, Haozhi, Zhen, Shujun, Wang, Haifeng, Wu, Jiahui +2 more·2024·Nature Communications

Abstract

Genomic DNA exhibits high heterogeneity in terms of its dynamic within the nucleus, its structure and functional roles. CRISPR-based imaging approaches can image genomic loci in living cells. However, conventional CRISPR-based tools involve expressing constitutively fluorescent proteins, resulting in high background and nonspecific nucleolar signal. Here, we construct fluorogenic CRISPR (fCRISPR) to overcome these issues. fCRISPR is designed with dCas9, an engineered sgRNA, and a fluorogenic protein. Fluorogenic proteins are degraded unless they are bound to specific RNA hairpins. These hairpins are inserted into sgRNA, resulting in dCas9: sgRNA: fluorogenic protein ternary complexes that enable fluorogenic DNA imaging. With fCRISPR, we image various genomic DNA in different human cells with high signal-to-noise ratio and sensitivity. Furthermore, fCRISPR tracks chromosomes dynamics and length. fCRISPR also allows DNA double-strand breaks (DSBs) and repair to be tracked in real time. Taken together, fCRISPR offers a high-contrast and sensitive platform for imaging genomic loci.

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  • Evolved base editor variants such as EvoFERNY and CBE6-variants no longer have the GC sequence context restriction.

    “The evolved variants such as EvoFERNY and CBE6-variants do no longer have this sequence context.”

    From Protocol to create isogenic disease models from adult stem cell-derived organoids using next-generation CRISPR tools (2024) · cites this paper as [26]

    The Introduction discusses CRISPR-based genomic imaging, and Methods > Plasmids construction describes guide-RNA design; neither addresses evolved base editors. Searches for EvoFERNY, CBE6 variants, and GC sequence-context restrictions found no passage in our copy that speaks to the claim. No page numbers were available for these passages. (LLM, conf=0.76)

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Authors
Zhang, Z., Rong, X., Xie, T., Li, Z., Song, H., Zhen, S., Wang, H., Wu, J., Jaffrey, S. R., & Li, X.
Affiliations
  • Chinese Academy of Sciences (CN)
  • Southwest University (CN)
  • Center for Life Sciences (CN)
  • University of Massachusetts Amherst (US)
  • Cornell University (US)
Corresponding author
Li, Xing
Venue
Nature Communications
Published
2024-01-31
Volume
15
Issue
1
Pages
934-934
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4391387015
Cited by
51
References
34
Citations by year
2026: 14 · 2025: 25 · 2024: 12
FWCI
6.94
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
The Talent research start-up fund, Beijing Institutes of Life Science, Chinese Academy of Sciences
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biophysics › Advanced Fluorescence Microscopy Techniques
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Advanced biosensing and bioanalysis techniques
Keywords
dCas9, RNA hairpin, chromosome dynamics, chromosome length, DNA double-strand breaks, DNA repair, live-cell imaging
MeSH terms
RNA, Guide, CRISPR-Cas Systems, DNA, Humans, Genome, Genomics, CRISPR-Cas Systems

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