Bactericidal agents generated by the peroxidase-catalyzed oxidation of para-hydroquinones.

Journal Article (Journal Article)

For the three Gram-negative bacteria, Pseudomonas fluorescens, Escherichia coli, and Erwinia amylovora, p-benzoquinone was the principal bactericidal agent formed in vitro during the oxidation of hydroquinone by horseradish peroxidase, whereas no toxicity could be associated with either phenolic or oxygen-free radicals. Even the continuous generation of p-benzosemiquinone during the simultaneous reduction of p-benzoquinone by xanthine oxidase and reoxidation of hydroquinone by peroxidase was no more toxic than p-benzoquinone alone. Anaerobiosis had no effect on the toxicity of either p-benzoquinone or the peroxidase reaction and the generation of superoxide and hydroxyl radicals catalyzed by xanthine oxidase was not bactericidal. Substitutions on the p-benzoquinone ring decreased quinone toxicity in rough proportion to the decrease in quinone redox potential, suggesting that strong oxidizing potentials are important for such quinone toxicity.

Duke Authors

Cited Authors

  • Beckman, JS; Siedow, JN

Published Date

  • November 1985

Published In

Volume / Issue

  • 260 / 27

Start / End Page

  • 14604 - 14609

PubMed ID

  • 3932358

Electronic International Standard Serial Number (EISSN)

  • 1083-351X

International Standard Serial Number (ISSN)

  • 0021-9258


  • eng