Deuterium-Labeled Precursor Feeding Reveals a New pABA-Containing Meroterpenoid from the Mango Pathogen Xanthomonas

Hesham Saleh1, Daniel Petras1, Andi Mainz1

  • 1Institut für Chemie, Technische Universität Berlin , Strasse des 17. Juni 124, 10623 Berlin, Germany.

Insights

Researchers discovered xanthomonic acid, a novel natural product from the mango pathogen Xanthomonas citri pv. mangiferaeindicae. This compound, an isoprenylated para-aminobenzoic acid derivative, shows in vitro anticancer activity by inducing autophagy in human cancer cells.

Area of Science:

  • Natural Product Chemistry
  • Microbiology
  • Cancer Biology

Background:

  • Xanthomonas citri pv. mangiferaeindicae is a significant mango pathogen.
  • Natural products often possess unique chemical structures and biological activities.

Purpose of the Study:

  • To identify and characterize novel natural products from Xanthomonas citri pv. mangiferaeindicae.
  • To investigate the biological activity of the isolated compounds.

Main Methods:

  • Stable isotope precursor feeding.
  • Nontargeted Liquid Chromatography-Mass Spectrometry/Mass Spectrometry (LC-MS/MS).
  • Molecular networking for spectral data visualization.
  • In vitro cytotoxicity assays.

Main Results:

  • Identification of a new meroterpenoid, xanthomonic acid.
  • Xanthomonic acid is an isoprenylated para-aminobenzoic acid derivative.
  • Xanthomonic acid exhibited in vitro cytotoxicity against human cancer cell lines.

Conclusions:

  • Xanthomonic acid is a novel natural product with potential anticancer properties.
  • The compound exerts its cytotoxic effect through the induction of autophagy.
  • This discovery opens avenues for further research into natural product-based cancer therapeutics.