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dc.contributor.authorTamarit Sumalla, Jordi
dc.contributor.authorCabiscol Català, Elisa
dc.contributor.authorRos Salvador, Joaquim
dc.date.accessioned2016-03-30T07:57:17Z
dc.date.available2016-03-30T07:57:17Z
dc.date.issued1998
dc.identifier.issn0021-9258
dc.identifier.urihttp://hdl.handle.net/10459.1/56765
dc.description.abstractIn the present study we have analyzed protein oxidation on Escherichia coli when these cells were submitted to different stress conditions such as hydrogen peroxide, superoxide-generating compounds, and iron overloading. Carbonyl groups on oxidized cell proteins were examined by Western blot immunoassay. When anaerobically grown E. coli cells were exposed to hydrogen peroxide stress, alcohol dehydrogenase E, elongation factor G, the heat shock protein DNA K, oligopeptidebinding protein A, enolase, and the outer membrane protein A were identified as the major protein targets. A similar immunostained band pattern was found when cells were shifted from anaerobic to aerobic conditions in the presence of different concentrations of iron; it is relevant to note that oxidation of outer membrane protein C, not observed in peroxide stress conditions, was clearly detected as the concentration of iron was increased in the culture media. The hydrogen peroxide stress performed under aerobic conditions affected the b-subunit of F0F1-ATPase; the rest of the oxidized protein pattern was very similar to that found for anaerobic conditions, with the exception of alcohol dehydrogenase E, a protein not synthesized aerobically. Cells submitted to superoxide stress using menadione showed a more specific pattern in which elongation factor G and the b-subunit of F0F1-ATPase were affected significantly. When paraquat was used, although the degree of oxidative damage was lower, the same two modified proteins were detected, and DNA K was also clearly damaged. Cell viability was affected to different extents depending on the type of stress exerted. The results described in this paper provide data about the in vivo effects of oxidative stress on protein oxidation and give insights into understanding how such modifications can affect cellular functions.ca_ES
dc.description.sponsorshipThis work was supported in part by Grant PB94-0829-C02-02 from the Dirección General de Investigación Científica y Técnica and the Comissionat per Universitats i Recerca de la Generalitat de Catalunya and Ajuntament of Lleida (Spain). The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked “advertisement” in accordance with 18 U.S.C. Section 1734 solely to indicate this fact.ca_ES
dc.language.isoengca_ES
dc.publisherAmerican Society for Biochemistry and Molecular Biologyca_ES
dc.relation.isformatofReproducció del document publicat a https://doi.org/10.1074/jbc.273.5.3027ca_ES
dc.relation.ispartofJournal of Biological Chemistry, 1998, Vol. 273, núm. 5, p. 3027-3032ca_ES
dc.rights(c) The American Society for Biochemistry and Molecular Biology, 1998ca_ES
dc.titleIdentification of the Major Oxidatively Damaged Proteins in Escherichia coli Cells Exposed to Oxidative Stressca_ES
dc.typearticleca_ES
dc.identifier.idgrec000363
dc.type.versionpublishedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.identifier.doihttps://doi.org/10.1074/jbc.273.5.3027


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