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Antibiotic Dereplication Using the Antibiotic Resistance Platform
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Antibiotic Dereplication Using the Antibiotic Resistance Platform.

Haley L Zubyk1, Georgina Cox2, Gerard D Wright3

  • 1Department of Biochemistry and Biomedical Sciences, M.G. DeGroote Institute for Infectious Disease Research, McMaster University.

Journal of Visualized Experiments : Jove
|November 5, 2019
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The antibiotic resistance platform (ARP) uses a library of antibiotic resistance genes in E. coli for rapid and cost-effective dereplication of natural product antibiotics. This method quickly identifies known and novel antibiotic compounds from microbial extracts.

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Area of Science:

  • Microbiology
  • Natural Product Chemistry
  • Drug Discovery

Background:

  • Discovering new antibiotics from natural products is hindered by the frequent re-isolation of known compounds (dereplication).
  • Current dereplication methods, like analytical separation and mass spectrometry, are often time-consuming and resource-intensive.
  • There is a need for more efficient and cost-effective dereplication strategies in antibiotic research.

Purpose of the Study:

  • To develop an improved method for the dereplication of antibiotic compounds from natural product extracts.
  • To introduce the antibiotic resistance platform (ARP) as a novel tool for rapid antibiotic identification.
  • To demonstrate the utility of the ARP for both identifying known antibiotics and discovering novel compounds.

Main Methods:

  • Development of the antibiotic resistance platform (ARP), a collection of approximately 100 antibiotic resistance genes cloned into Escherichia coli.
  • Fermentation of antibiotic-producing microbes, followed by removal of biomass and addition of an agar overlay.
  • Pinning of ARP E. coli strains onto the agar overlay of antibiotic-containing plates for overnight incubation.

Main Results:

  • The ARP method allows for the rapid identification of antibiotic compounds based on the growth of specific E. coli strains exhibiting resistance.
  • The platform successfully identified producers of known antibiotics.
  • The method proved effective in identifying microbial producers of novel antibiotic compounds.

Conclusions:

  • The antibiotic resistance platform (ARP) provides a cost-effective and facile method for antibiotic dereplication.
  • ARP significantly improves the efficiency of identifying antibiotic compounds from natural product extracts.
  • This platform facilitates both the recognition of known antibiotics and the discovery of new ones, accelerating antibiotic research.