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© Antoinette Ryter
Serratia marcescens avec présence de flagelles (cils) péritriches. Famille des Enterobacteriaceae, bacille à Gram négatif, non sporulé, anaérobie facultatif, mobile, parfois encapsulé, pouvant synthétiser un pigment rouge ou rose. Présent dans les végétaux , le sol, et l'eau. A l'origine d'infections nosocomiales et résistant à de nombreux antibiotiques. Image colorisée.
Publication : Current Opinion in Microbiology

Using CRISPR-Cas systems as antimicrobials

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Current Opinion in Microbiology - 01 Jun 2017

David Bikard, Rodolphe Barrangou

Current Opinion in Microbiology 2017, 37:155–160

Although CRISPR-Cas systems naturally evolved to provide adaptive immunity in bacteria and archaea, Cas nucleases can be co-opted to target chromosomal sequences rather than invasive genetic elements. Although genome editing is the primary outcome of self-targeting using CRISPR-based technologies in eukaryotes, self-targeting by CRISPR is typically lethal in bacteria. Here, we discuss how DNA damage introduced by Cas nucleases in bacteria can efficiently and specifically lead to plasmid curing or drive cell death. Specifically, we discuss how various CRISPR-Cas systems can be engineered and delivered using phages or phagemids as vectors. These principles establish CRISPR-Cas systems as potent and programmable antimicrobials, and open new avenues for the development of CRISPR-based tools for selective removal of bacterial pathogens and precise microbiome composition alteration.

https://doi.org/10.1016/j.mib.2017.08.005