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Titolo:
IDENTIFICATION OF THE MAJOR OXIDATIVELY DAMAGED PROTEINS IN ESCHERICHIA-COLI-CELLS EXPOSED TO OXIDATIVE STRESS
Autore:
TAMARIT J; CABISCOL E; ROS J;
Indirizzi:
UNIV LLEIDA,DEPT CIENCIES MED BASIQUES,FAC MED,AVDA ROVIRA ROURE 44 LLEIDA 25198 SPAIN UNIV LLEIDA,DEPT CIENCIES MED BASIQUES,FAC MED LLEIDA 25198 SPAIN
Titolo Testata:
The Journal of biological chemistry
fascicolo: 5, volume: 273, anno: 1998,
pagine: 3027 - 3032
SICI:
0021-9258(1998)273:5<3027:IOTMOD>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
METAL-CATALYZED OXIDATION; ELONGATION-FACTOR-G; HYDROGEN-PEROXIDE; RNASE-E; IRON; ENZYME; IONS; DEHYDROGENASES; ACCUMULATION; INACTIVATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
56
Recensione:
Indirizzi per estratti:
Citazione:
J. Tamarit et al., "IDENTIFICATION OF THE MAJOR OXIDATIVELY DAMAGED PROTEINS IN ESCHERICHIA-COLI-CELLS EXPOSED TO OXIDATIVE STRESS", The Journal of biological chemistry, 273(5), 1998, pp. 3027-3032

Abstract

In 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 byWestern blot immunoassay. When anaerobically grown E, coil cells wereexposed to hydrogen peroxide stress, alcohol dehydrogenase E, elongation factor G, the heat shock protein DNA K, oligopeptide-binding protein A, enolase, and the outer membrane protein A were identified as themajor protein targets, A similar immunostained band pattern was foundwhen 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 performedunder aerobic conditions affected the beta-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 beta-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 Kwas 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.

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Documento generato il 28/03/20 alle ore 10:47:35