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Updated: Jun 6, 2025

Microtiter Dish Biofilm Formation Assay
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An evolutionarily conserved metabolite inhibits biofilm formation in Escherichia coli K-12

Jingzhe Guo1, Wilhelmina T Van De Ven1, Aleksandra Skirycz2,3,4

  • 1Institute for Integrative Genome Biology and Department of Botany and Plant Sciences, University of California, Riverside, Riverside, CA, USA.

Nature Communications
|November 21, 2024
PubMed

Insights

Methylerythritol cyclodiphosphate (MEcPP), a stress signal in plants, inhibits biofilm formation and fimbriae production in E. coli. MEcPP regulates this process by interacting with the H-NS protein, affecting fimE gene transcription.

Area of Science:

  • Microbiology
  • Molecular Biology
  • Biochemistry

Background:

  • Methylerythritol cyclodiphosphate (MEcPP) is a key isoprenoid biosynthesis intermediate and plant stress signal.
  • Biofilm formation is crucial for bacterial survival and virulence, regulated by complex genetic networks.
  • Fimbriae are essential adhesive appendages involved in bacterial attachment and biofilm development.

Purpose of the Study:

  • To investigate the role of MEcPP in regulating biofilm formation in Escherichia coli.
  • To elucidate the molecular mechanism by which MEcPP influences biofilm development and fimbriae production.

Main Methods:

  • Genetic manipulation to alter MEcPP levels in E. coli K-12 MG1655.
  • Assessment of biofilm formation and fimbriae production under varying MEcPP conditions.
  • Limited proteolysis-coupled mass spectrometry (LiP-MS) to identify protein interactions.

Main Results:

  • Elevated MEcPP levels, induced by genetic modification or oxidative stress, significantly inhibit biofilm formation and fimbriae production.
  • Deletion of the fimE gene restores biofilm formation in MEcPP-overproducing cells.
  • MEcPP interacts with the global regulator H-NS, preventing its binding to the fimE promoter and thereby modulating fimE transcription.

Conclusions:

  • MEcPP acts as a novel regulator of biofilm formation in E. coli.
  • The regulatory mechanism involves MEcPP's interference with H-NS binding to the fimE promoter, leading to reduced fimbriae production.
  • Further studies are warranted to explore MEcPP's regulatory functions in other bacterial species.

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