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Related Experiment Video

Updated: Apr 11, 2026

High-throughput Siderophore Screening from Environmental Samples: Plant Tissues, Bulk Soils, and Rhizosphere Soils

High-throughput Siderophore Screening from Environmental Samples: Plant Tissues, Bulk Soils, and Rhizosphere Soils

Published on: February 9, 2019

Microbial Copper-binding Siderophores at the Host-Pathogen Interface.

Eun-Ik Koh¹, Jeffrey P Henderson²

¹From the Center for Women's Infectious Diseases Research, Division of Infectious Diseases, and Department of Internal Medicine, Washington University School of Medicine, St. Louis, Missouri 63110.

The Journal of Biological Chemistry

|June 10, 2015

Summary

Pathogenic bacteria use siderophores to bind iron. A specific siderophore, yersiniabactin, also binds copper, protecting E. coli from toxicity and host defenses during infections.

Keywords:

copper host-pathogen interaction microbial pathogenesis siderophore superoxide dismutase (SOD)

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Area of Science:

Microbiology
Infectious Diseases
Biochemistry

Background:

Pathogenic microbes utilize siderophores to scavenge iron, a crucial nutrient for growth.
Yersiniabactin, a siderophore from uropathogenic Escherichia coli, has recently demonstrated copper-binding capabilities.
This copper-binding ability distinguishes yersiniabactin from other siderophores and suggests a novel role in virulence.

Purpose of the Study:

To compare the copper-binding properties of yersiniabactin with other known extracellular copper-binding molecules.
To review the potential impact of copper-binding siderophores on bacterial virulence during infection.
To elucidate the mechanisms by which yersiniabactin confers resistance to copper toxicity and host immune responses.

Main Methods:

Comparative analysis of yersiniabactin's copper-binding affinity against other chelators.
Literature review on the role of metal ions in microbial pathogenesis.
Examination of yersiniabactin's protective effects against copper toxicity in E. coli.

Main Results:

Yersiniabactin exhibits significant extracellular copper-binding capacity.
This binding confers protection to E. coli against copper-induced toxicity.
Yersiniabactin's copper chelation may neutralize host defense mechanisms.

Conclusions:

Copper-binding siderophores, like yersiniabactin, represent a novel virulence factor for pathogenic bacteria.
Understanding these interactions is critical for developing new therapeutic strategies against infections.
Yersiniabactin's dual iron and copper-binding ability offers a unique advantage to E. coli during infection.