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A single digestion, single-stranded oligonucleotide mediated PCR-independent site-directed mutagenesis method

  • Applied genetics and molecular biotechnology
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Applied Microbiology and Biotechnology Aims and scope Submit manuscript

Abstract

A PCR-independent in vitro site-directed mutagenesis method was established. Cas12a from Francisella novicida (FnCas12a) linearizes the plasmid with single digestion. T5 exonuclease removes the target nucleotide. A short single- or double-stranded mutagenic oligonucleotide introduces the mutation. This rapid and simple mutagenesis method is referred to as FnCas12a and T5 exonuclease mediated site-directed mutagenesis system (CT5-SDM). The platform is also suitable for the mutagenesis of plasmids larger than 10 kb.

Key Points

  • Site-directed mutagenesis mediated by single-stranded DNA.

  • Removing target site with T5 exonuclease.

  • Highly efficient cleavage of target DNA with FnCas12a.

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Funding

This work was supported by the National Natural Science Foundation of China (21977026 and 21702052).

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Authors and Affiliations

Authors

Contributions

LM and CZ conceived and designed the study; MD carried out almost all experiments. MD, CZ, and FW performed the analysis of all the data; MD and QL were responsible for all the figures; FW, RH, and QL were involved with plasmid construction and FnCas12a expression; CZ wrote the manuscript; CZ and AL revised the manuscript. All authors read and approved the manuscript.

Corresponding authors

Correspondence to Chao Zhai or Lixin Ma.

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The authors declare that they have no conflict of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Dong, M., Wang, F., Li, Q. et al. A single digestion, single-stranded oligonucleotide mediated PCR-independent site-directed mutagenesis method. Appl Microbiol Biotechnol 104, 3993–4003 (2020). https://doi.org/10.1007/s00253-020-10477-3

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  • DOI: https://doi.org/10.1007/s00253-020-10477-3

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