Reduction of the monounsaturated fatty acid content of Escherichia coli results in increased resistance to oxidative damage

Gonzalo A. Pradenas, Braulio A. Paillavil, Sebastián Reyes-Cerpa, José M. Pérez-Donoso, Claudio C. Vásquez

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Reactive oxygen species (ROSs) affect several macromolecules and cellular components in eukaryotic and prokaryotic cells. In this work, the effect of various ROS-generating compounds on the Escherichia coli membrane was studied. Membrane fatty acid profiles, oxidative damage levels and bacterial resistance to these toxicants were determined. Studies included wild-type cells as well as a strain exhibiting a modified monounsaturated fatty acid (MUFA) profile (accomplished by overexpressing the β-hydroxyacyl acyl carrier protein dehydratase-encoding gene, fabA). Levels of membrane MUFAs and oxidative damage markers decreased slightly upon toxicant exposure with a concomitant increase in cell resistance to these ROS-generating compounds. A direct relationship between MUFAs and lipid peroxidation was observed. The lower the MUFA the lower the peroxide levels, suggesting that MUFAs are targets for membrane lipid oxidation.

Original languageEnglish (US)
Pages (from-to)1279-1283
Number of pages5
JournalMicrobiology
Volume158
Issue number5
DOIs
StatePublished - May 1 2012

ASJC Scopus subject areas

  • Microbiology

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    Pradenas, G. A., Paillavil, B. A., Reyes-Cerpa, S., Pérez-Donoso, J. M., & Vásquez, C. C. (2012). Reduction of the monounsaturated fatty acid content of Escherichia coli results in increased resistance to oxidative damage. Microbiology, 158(5), 1279-1283. https://doi.org/10.1099/mic.0.056903-0