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1
Content available remote Menadione effect on l-cysteine desulfuration in U373 cells
100%
Wróbel M. , Jurkowska H.
Acta Biochimica Polonica
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2007
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tom 54
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nr 2
407-411
EN
The non-cytotoxic concentration (20 µM) of menadione (2-methyl-1,4-naphthoquinone), after 1 h of incubation, leads to loss of the activity of rhodanese by 33%, 3-mercaptopyruvate sulfurtransferase by 20%, as well as the level of sulfane sulfur by about 23% and glutathione by 12%, in the culture of U373 cells, in comparison with the control culture. Reactive oxygen species generated by menadione oxidize sulfhydryl groups in active centers of the investigated enzymes, inhibiting them and saving cysteine for glutathione synthesis. A decreased sulfane sulfur level can be correlated with an oxidative stress.
2
Activity of sulphite oxidase, thiosulphate oxidase and rhodanese in Thiobacillus ferrooxidans during sphalerite leaching
100%
Cwalina B. , Weglarz L. , Dzierzewicz Z. , Wilczok T.
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nr 1-2
3
Influence of irrigation on the sulphur content and soil enzymes activity under Silphium perfoliatum L.
84%
Siwik-Ziomek A. , Figas A. , Rolbiecki R.
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nr 3
4
Menadione effect on L-cysteine desulfuration in U373 cells
84%
Wrobel M. , Jurkowska H.
|
|
tom 54
|
nr 2
EN
The non-cytotoxic concentration (20 µM) of menadione (2-methyl-1,4-naphthoquinone), after 1 h of incubation, leads to loss of the activity of rhodanese by 33%, 3-mercaptopyruvate sulfurtransferase by 20%, as well as the level of sulfane sulfur by about 23% and glutathione by 12%, in the culture of U373 cells, in comparison with the control culture. Reactive oxygen species generated by menadione oxidize sulfhydryl groups in active centers of the investigated enzymes, inhibiting them and saving cysteine for glutathione synthesis. A decreased sulfane sulfur level can be correlated with an oxidative stress.
5
The effect of cAMP and some sulphur compounds upon the activity of Mercaptopyruvate sulphurtransferase and rhodanese in mouse liver
67%
Wrobel M. , Frendo J.
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tom 40
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nr 1-2
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