Publikation: Hydroquinone degradation via reductive dehydroxylation of gentisyl-CoA by a strictly anaerobic fermenting bacterium
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1994
Autor:innen
Gorny, Norbert
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Published
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Archives of Microbiology. 1994, 161(1), pp. 25-32. ISSN 0302-8933. eISSN 1432-072X. Available under: doi: 10.1007/BF00248890
Zusammenfassung
Anaerobic degradation of hydroquinone was studied with the fermenting bacterium strain HQG61. The rate of hydroquinone degradation by dense cell suspensions was dramatically accelerated by addition of NaHCO3. During fermentation of hydroquinone in the presence of 14C-Na2CO3 benzoate was formed as a labelled product, indicating an initial ortho-carboxylation of hydroquinone to gentisate. Gentisate was activated to the corresponding CoA-ester in a CoA ligase reaction at a specific activity of 0.15 gmol x rain- 1 x mg protein- 1. Gentisyl-CoA was reduced to benzoyl-CoA with reduced methyl viologen as electron donor by simultaneous reductive elimination of both the ortho and meta hydroxyl group. The specific activity of this novel gentisyl-CoA reductase was 17 nmol x rain- 1 x mg protein- 1. Further degradation to acetate was catalyzed by enzymes which occur also in other bacteria degrading aromatic compounds via benzoyl-CoA.
Zusammenfassung in einer weiteren Sprache
Fachgebiet (DDC)
570 Biowissenschaften, Biologie
Schlagwörter
Anaerobic degradation, Aromatic compounds, Gentisate, Carboxylation, Reductive elimination, Benzoyl-CoA pathway
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ISO 690
GORNY, Norbert, Bernhard SCHINK, 1994. Hydroquinone degradation via reductive dehydroxylation of gentisyl-CoA by a strictly anaerobic fermenting bacterium. In: Archives of Microbiology. 1994, 161(1), pp. 25-32. ISSN 0302-8933. eISSN 1432-072X. Available under: doi: 10.1007/BF00248890BibTex
@article{Gorny1994Hydro-6782,
year={1994},
doi={10.1007/BF00248890},
title={Hydroquinone degradation via reductive dehydroxylation of gentisyl-CoA by a strictly anaerobic fermenting bacterium},
number={1},
volume={161},
issn={0302-8933},
journal={Archives of Microbiology},
pages={25--32},
author={Gorny, Norbert and Schink, Bernhard}
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<dcterms:abstract xml:lang="eng">Anaerobic degradation of hydroquinone was studied with the fermenting bacterium strain HQG61. The rate of hydroquinone degradation by dense cell suspensions was dramatically accelerated by addition of NaHCO3. During fermentation of hydroquinone in the presence of 14C-Na2CO3 benzoate was formed as a labelled product, indicating an initial ortho-carboxylation of hydroquinone to gentisate. Gentisate was activated to the corresponding CoA-ester in a CoA ligase reaction at a specific activity of 0.15 gmol x rain- 1 x mg protein- 1. Gentisyl-CoA was reduced to benzoyl-CoA with reduced methyl viologen as electron donor by simultaneous reductive elimination of both the ortho and meta hydroxyl group. The specific activity of this novel gentisyl-CoA reductase was 17 nmol x rain- 1 x mg protein- 1. Further degradation to acetate was catalyzed by enzymes which occur also in other bacteria degrading aromatic compounds via benzoyl-CoA.</dcterms:abstract>
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