Related Experiment Video
Updated: Mar 20, 2026

Fluorescent Visualization of Mango-tagged RNA in Polyacrylamide Gels via a Poststaining Method
Published on: June 21, 2019
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.
Abstract:
A new para-aminobenzoic-acid-containing natural product from the mango pathogenic organism Xanthomonas citri pv. mangiferaeindicae is described. By means of stable isotope precursor feeding combined with nontargeted LC-MS/MS, the generated spectra were clustered and visualized in a molecular network. This led to the identification of a new member of the meroterpenoids, termed xanthomonic acid, which is composed of an isoprenylated para-aminobenzoic acid. In vitro cytotoxicity assays demonstrated activity of xanthomonic acid against several human cancer cell lines by induction of autophagy.
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.

