Abstract
We utilized a CRISPR interference (CRISPRi) assay to control the gene expressions of two predicted essential peptidoglycan biosynthesis genes, pbpB and cwIM, in Mycobacterium abscessus and to evaluate their contribution to β-lactam susceptibility. Our results showed that CRISPR inhibition of each gene led to a significant 3-log10 reduction in CFU in the presence of imipenem but not for cefoxitin. These results demonstrate that CRISPRi provides an experimental approach to study drug/target interactions in M. abscessus.
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