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Updated: Sep 29, 2025

An Assay for Quantifying Protein-RNA Binding in Bacteria
Published on: June 12, 2019
Proximal Binding Pocket Arg717 Substitutions in Escherichia coli AcrB Cause Clinically Relevant Divergencies in
Martijn Zwama1, Kunihiko Nishino1,2,3
1SANKEN (The Institute of Scientific and Industrial Research), Osaka Universitygrid.136593.b, Ibaraki, Osaka, Japan.
Abstract:
Recent mutations in RND efflux pumps in clinical strains have further increased multidrug resistance. We show that R717L and R717Q substitutions (found in azithromycin-resistant Salmonella enterica spp.) in the Escherichia coli efflux pump AcrB dramatically increase macrolide, as well as fluoroquinolone, resistance. On the other hand, cells became more susceptible to novobiocin and β-lactam cloxacillin. We urge the control of, and adjustments to, treatments with antibiotics and the need for novel antibiotics and efflux pump inhibitors.
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