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Author Spotlight: Quantifying Siderophores and Pyochelin for Infection Control
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Author Spotlight: Quantifying Siderophores and Pyochelin for Infection Control

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Identification and structural characterisation of a catecholate-type siderophore produced by Stenotrophomonas

Atsushi Hisatomi1, Yuh Shiwa2, Nobuyuki Fujita2

  • 1Department of Ecological Symbiotic Science, Graduate school of Agriculture, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan.

Microbiology (Reading, England)
|July 19, 2021
PubMed

Insights

Stenotrophomonas maltophilia bacteria produce 2,3-dihydroxybenzoylserine (DHBS), a siderophore crucial for iron uptake. Targeting DHBS synthesis may offer new strategies to combat S. maltophilia infections.

Area of Science:

  • Microbiology
  • Biochemistry
  • Drug Development

Background:

  • Siderophores are essential iron-chelating compounds produced by bacteria.
  • Stenotrophomonas maltophilia, a pathogen causing pneumonia, produces unknown siderophores.
  • Understanding siderophore structure can aid in developing novel therapeutics.

Purpose of the Study:

  • To elucidate the chemical structure of siderophores produced by Stenotrophomonas maltophilia K279a.
  • To investigate the role of identified siderophores in iron acquisition.
  • To explore potential therapeutic targets based on siderophore synthesis.

Main Methods:

  • Bacterial culture and siderophore purification using preparative reversed-phase HPLC.
  • Structural elucidation employing Liquid Chromatography-Mass Spectrometry (LC-MS).
  • Nuclear Magnetic Resonance (NMR) spectroscopy (¹H and ¹³C) for detailed structural analysis.

Main Results:

  • S. maltophilia K279a was found to produce 2,3-dihydroxybenzoylserine (DHBS).
  • DHBS is a monomeric unit of the well-known siderophore enterobactin.
  • The DHBS-Iron(III) complex was proposed as the mechanism for iron uptake.
  • DHBS production suggests an incomplete enterobactin biosynthetic pathway.

Conclusions:

  • The structure of a key siderophore from S. maltophilia has been identified as DHBS.
  • DHBS plays a role in iron acquisition for S. maltophilia.
  • Targeting DHBS synthesis presents a potential strategy for developing drugs against S. maltophilia infections.
Keywords:
2,3-dihydroxybenzoylserineStenotrophomonas maltophilia K279aenterobactinsiderophore

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