Hydrogen metabolism in aerobic hydrogen-oxidizing bacteria

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1978
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Schlegel, Hans G.
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Biochimie. 1978, 60, pp. 297-305. ISSN 0300-9084
Zusammenfassung

A survey on organisms able to use molecular hydroqen as electron donor in the enerqy-yielding process is presented. In the group of the aerobic hydrogen-oxidizing bacteria so far two types of hydrogenases have been en- countered, a NAD-reducing, soluble enzyme (H2 : NAD oxidoreductase) and a membrane-bound enzyme unable to reduce pyridine nucleotides. With respect to the distribution of both types of hydrogenases three groups of hydroqen-oxidizing bacteria can be diffentiated containing (i) both types (Alcaligenes eutrophus), (ii) a soluble enzyme only (Nocardia opaca lb), and (iii) a membrane-bound hydrogenase only (majority of genera and species). The results of studies on the NAD-specific hydrogenase of A. eutrophus are summarized. Results on the solubilization and purification of the membrane-bound hydrogenase of A. eutrophus are presented in detail. The enzyme was solubilized from purified membranes by Triton X-100 and sodium desoxycholate or phospholipase D. The crude membrane extract was fractionated by ammonium sulfate precipitation and chromatography on carboxymethylcellulose at pH 5.5. The enzyme was stable in potassium phosphate buffer ; it resembles the soluble enzyme with respect to stability under oxidizinq conditions. Further biochemical and immunological data indicate, however, that both enzymes are different with respect to their native structure.

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570 Biowissenschaften, Biologie
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ISO 690SCHINK, Bernhard, Hans G. SCHLEGEL, 1978. Hydrogen metabolism in aerobic hydrogen-oxidizing bacteria. In: Biochimie. 1978, 60, pp. 297-305. ISSN 0300-9084
BibTex
@article{Schink1978Hydro-6669,
  year={1978},
  title={Hydrogen metabolism in aerobic hydrogen-oxidizing bacteria},
  volume={60},
  issn={0300-9084},
  journal={Biochimie},
  pages={297--305},
  author={Schink, Bernhard and Schlegel, Hans G.}
}
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