Abstract
The aldehyde dehydrogenase activity of the sulfate-reducing bacterium Desulfovibrio simplex strain DSM 4141 was characterized in cell-free extracts. Oxygen-sensitive, constitutive aldehyde dehydrogenase activity was found in cells grown on l(+)-lactate, hydrogen, or vanillin with sulfate as the electron acceptor. A 1.83- to 2.6-fold higher specific activity was obtained in cells grown in media supplemented with 1 μM WO4 2–. The aldehyde dehydrogenase in cell-free extracts catalyzed the oxidation of aliphatic (K m < 20 μM) and aromatic aldehydes (K m < 0.32 mM) using methyl viologen as the electron acceptor. Flavins (FMN and FAD) were also active and are proposed to be the natural cofactors, while no activity was obtained with NAD+ or NADP+. 185WO4 2– was incorporated in vivo into D. simplex; it was found exclusively in the soluble fraction (≥ 98%). Anionic-exchange chromatography demonstrated coelution of 185W with two distinct peaks, the first one containing hydrogenase and formate dehydrogenase activities, and the second one aldehyde dehydrogenase activity.
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Received: 7 February 1997 / Accepted: 6 June 1997
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Zellner, G., Jargon, A. Evidence for a tungsten-stimulated aldehyde dehydrogenase activity of Desulfovibrio simplex that oxidizes aliphatic and aromatic aldehydes with flavins as coenzymes. Arch Microbiol 168, 480–485 (1997). https://doi.org/10.1007/s002030050525
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DOI: https://doi.org/10.1007/s002030050525