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Title: A Chemical-Genomic Screen of Neglected Antibiotics Reveals Illicit Transport of Kasugamycin and Blasticidin S

Journal Article · · PLoS Genetics

Fighting antibiotic resistance requires a deeper understanding of the genetic factors that determine the antibiotic susceptibility of bacteria. Here we describe a chemical-genomic screen in Escherichia coli K-12 that was designed to discover new aspects of antibiotic resistance by focusing on a set of 26 antibiotics and other stresses with poorly characterized mode-of-action and determinants of resistance. We show that the screen identifies new resistance determinants for these antibiotics including a common signature from two antimicrobials, kasugamycin and blasticidin S, used to treat crop diseases like rice blast and fire blight. Following this signature, we further investigated the mechanistic basis for susceptibility to kasugamycin and blasticidin S in E. coli using both genetic and biochemical approaches. We provide evidence that these compounds hijack an overlapping set of peptide ABC-importers to enter the bacterial cell. As a result, the loss of uptake may be an underappreciated mechanism for the development of kasugamycin resistance in bacterial plant pathogens.

Research Organization:
Office of Scientific and Technical Information, Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
Graduate Fellowship
OSTI ID:
1337762
Alternate ID(s):
OSTI ID: 1376695
Journal Information:
PLoS Genetics, Journal Name: PLoS Genetics Vol. 12 Journal Issue: 6; ISSN 1553-7404
Publisher:
Public Library of Science (PLoS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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