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

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

21 Citas (Scopus)

Resumen

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.

Idioma originalInglés
Páginas (desde-hasta)1279-1283
Número de páginas5
PublicaciónMicrobiology
Volumen158
N.º5
DOI
EstadoPublicada - may 2012

Áreas temáticas de ASJC Scopus

  • Microbiología

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