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Barriers to genome editing with CRISPR in bacteria

  • Justin M. Vento
  • Nathan Crook
  • Chase L. BeiselEmail author
Metabolic Engineering and Synthetic Biology - Review

Abstract

Genome editing is essential for probing genotype–phenotype relationships and for enhancing chemical production and phenotypic robustness in industrial bacteria. Currently, the most popular tools for genome editing couple recombineering with DNA cleavage by the CRISPR nuclease Cas9 from Streptococcus pyogenes. Although successful in some model strains, CRISPR-based genome editing has been slow to extend to the multitude of industrially relevant bacteria. In this review, we analyze existing barriers to implementing CRISPR-based editing across diverse bacterial species. We first compare the efficacy of current CRISPR-based editing strategies. Next, we discuss alternatives when the S. pyogenes Cas9 does not yield colonies. Finally, we describe different ways bacteria can evade editing and how elucidating these failure modes can improve CRISPR-based genome editing across strains. Together, this review highlights existing obstacles to CRISPR-based editing in bacteria and offers guidelines to help achieve and enhance editing in a wider range of bacterial species, including non-model strains.

Keywords

Bacteria Nuclease Genome editing CRISPR Recombineering 

Notes

Acknowledgements

This work was supported by the National Science Foundation (MCB-1452902 to CLB), the National Institutes of Health (5T32GM008776 to JMV) and start-up funds from NCSU (to NCC). We also gratefully acknowledge Jie Sun for assistance with figure preparation.

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Copyright information

© Society for Industrial Microbiology and Biotechnology 2019

Authors and Affiliations

  1. 1.Department of Chemical and Biomolecular EngineeringNorth Carolina State UniversityRaleighUSA
  2. 2.Helmholtz Institute for RNA-based Infection Research (HIRI)Helmholtz-Centre for Infection Research (HZI)WürzburgGermany
  3. 3.Medical FacultyUniversity of WürzburgWürzburgGermany

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