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CRISPR technologies and the search for the PAM-free nuclease

Author

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  • Daphne Collias

    (North Carolina State University)

  • Chase L. Beisel

    (North Carolina State University
    Helmholtz Institute for RNA-based Infection Research (HIRI)/Helmholtz Centre for Infection Research (HZI)
    University of Würzburg)

Abstract

The ever-expanding set of CRISPR technologies and their programmable RNA-guided nucleases exhibit remarkable flexibility in DNA targeting. However, this flexibility comes with an ever-present constraint: the requirement for a protospacer adjacent motif (PAM) flanking each target. While PAMs play an essential role in self/nonself discrimination by CRISPR-Cas immune systems, this constraint has launched a far-reaching expedition for nucleases with relaxed PAM requirements. Here, we review ongoing efforts toward realizing PAM-free nucleases through natural ortholog mining and protein engineering. We also address potential consequences of fully eliminating PAM recognition and instead propose an alternative nuclease repertoire covering all possible PAM sequences.

Suggested Citation

  • Daphne Collias & Chase L. Beisel, 2021. "CRISPR technologies and the search for the PAM-free nuclease," Nature Communications, Nature, vol. 12(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20633-y
    DOI: 10.1038/s41467-020-20633-y
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    Cited by:

    1. Xu Feng & Ruyi Xu & Jianglan Liao & Jingyu Zhao & Baochang Zhang & Xiaoxiao Xu & Pengpeng Zhao & Xiaoning Wang & Jianyun Yao & Pengxia Wang & Xiaoxue Wang & Wenyuan Han & Qunxin She, 2024. "Flexible TAM requirement of TnpB enables efficient single-nucleotide editing with expanded targeting scope," Nature Communications, Nature, vol. 15(1), pages 1-14, December.
    2. Margot Karlikow & Evan Amalfitano & Xiaolong Yang & Jennifer Doucet & Abigail Chapman & Peivand Sadat Mousavi & Paige Homme & Polina Sutyrina & Winston Chan & Sofia Lemak & Alexander F. Yakunin & Adam, 2023. "CRISPR-induced DNA reorganization for multiplexed nucleic acid detection," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    3. Jeremy Vicencio & Carlos Sánchez-Bolaños & Ismael Moreno-Sánchez & David Brena & Charles E. Vejnar & Dmytro Kukhtar & Miguel Ruiz-López & Mariona Cots-Ponjoan & Alejandro Rubio & Natalia Rodrigo Meler, 2022. "Genome editing in animals with minimal PAM CRISPR-Cas9 enzymes," Nature Communications, Nature, vol. 13(1), pages 1-13, December.
    4. Jianli Tao & Daniel E. Bauer & Roberto Chiarle, 2023. "Assessing and advancing the safety of CRISPR-Cas tools: from DNA to RNA editing," Nature Communications, Nature, vol. 14(1), pages 1-16, December.
    5. Péter István Kulcsár & András Tálas & Zoltán Ligeti & Eszter Tóth & Zsófia Rakvács & Zsuzsa Bartos & Sarah Laura Krausz & Ágnes Welker & Vanessza Laura Végi & Krisztina Huszár & Ervin Welker, 2023. "A cleavage rule for selection of increased-fidelity SpCas9 variants with high efficiency and no detectable off-targets," Nature Communications, Nature, vol. 14(1), pages 1-20, December.
    6. Daphne Collias & Elena Vialetto & Jiaqi Yu & Khoa Co & Éva d. H. Almási & Ann-Sophie Rüttiger & Tatjana Achmedov & Till Strowig & Chase L. Beisel, 2023. "Systematically attenuating DNA targeting enables CRISPR-driven editing in bacteria," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    7. Matteo Ciciani & Michele Demozzi & Eleonora Pedrazzoli & Elisabetta Visentin & Laura Pezzè & Lorenzo Federico Signorini & Aitor Blanco-Miguez & Moreno Zolfo & Francesco Asnicar & Antonio Casini & Anna, 2022. "Automated identification of sequence-tailored Cas9 proteins using massive metagenomic data," Nature Communications, Nature, vol. 13(1), pages 1-8, December.

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