Evidence for the presence of a new NAD+-dependent formate dehydrogenase in Pseudomonas sp. 101 cells grown on a molybdenum-containing medium |
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Authors: | V V Karzanov Tishkov" target="_blank">V I Bogatsky YuATishkov A M Egorov |
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Institution: | Chemistry Department, M.V. Lomonosov State University, Moscow, U.S.S.R. |
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Abstract: | The facultatively methylotrophic bacterium Pseudomonas sp. 101, grown on methanol in presence of molybdate, contains a new formate dehydrogenase (N-FDH) catalyzing NAD+-dependent oxidation of formate. The activity of this N-FDH could also be measured in presence of artificial electron acceptors, ferricyanide and 2,6-dichlorophenol indophenol. This new enzyme is absent in cells grown on a methanol-containing medium with tungstate, where only another two, previously described formate dehydrogenases, which are active only with NAD+ or only with artificial acceptors, respectively, were determined. The N-FDH was partially purified by a combination of ion-exchange and gel-filtration chromatography, and was shown to differ in its properties from the known NAD+-dependent counterpart. |
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