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Coiled-coil heterodimer-based recruitment of an exonuclease to CRISPR/Cas for enhanced gene editing

Author

Listed:
  • Duško Lainšček

    (National Institute of Chemistry
    EN-FIST Centre of Excellence)

  • Vida Forstnerič

    (National Institute of Chemistry)

  • Veronika Mikolič

    (University Medical Centre Ljubljana
    University of Ljubljana)

  • Špela Malenšek

    (National Institute of Chemistry
    University of Ljubljana)

  • Peter Pečan

    (National Institute of Chemistry
    University of Ljubljana)

  • Mojca Benčina

    (National Institute of Chemistry
    EN-FIST Centre of Excellence)

  • Matjaž Sever

    (University Medical Centre Ljubljana
    University of Ljubljana)

  • Helena Podgornik

    (University Medical Centre Ljubljana
    University of Ljubljana)

  • Roman Jerala

    (National Institute of Chemistry
    EN-FIST Centre of Excellence)

Abstract

The CRISPR/Cas system has emerged as a powerful and versatile genome engineering tool, revolutionizing biological and biomedical sciences, where an improvement of efficiency could have a strong impact. Here we present a strategy to enhance gene editing based on the concerted action of Cas9 and an exonuclease. Non-covalent recruitment of exonuclease to Cas9/gRNA complex via genetically encoded coiled-coil based domains, termed CCExo, recruited the exonuclease to the cleavage site and robustly increased gene knock-out due to progressive DNA strand recession at the cleavage site, causing decreased re-ligation of the nonedited DNA. CCExo exhibited increased deletion size and enhanced gene inactivation efficiency in the context of several DNA targets, gRNA selection, Cas variants, tested cell lines and type of delivery. Targeting a sequence-specific oncogenic chromosomal translocation using CCExo in cells of chronic myelogenous leukemia patients and in an animal model led to the reduction or elimination of cancer, establishing it as a highly specific tool for treating CML and potentially other appropriate diseases with genetic etiology.

Suggested Citation

  • Duško Lainšček & Vida Forstnerič & Veronika Mikolič & Špela Malenšek & Peter Pečan & Mojca Benčina & Matjaž Sever & Helena Podgornik & Roman Jerala, 2022. "Coiled-coil heterodimer-based recruitment of an exonuclease to CRISPR/Cas for enhanced gene editing," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-31386-1
    DOI: 10.1038/s41467-022-31386-1
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