H2 metabolism in the photosynthetic bacterium Rhodopseudomonas capsulata: H2 production by growing cultures
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چکیده
منابع مشابه
H2 metabolism in the photosynthetic bacterium Rhodopseudomonas capsulata: production and utilization of H2 by resting cells.
Photoproduction of H2 and activation of H2 for CO2 reduction (photoreduction) by Rhodopseudomonas capsulata are catalyzed by different enzyme systems. Formation of H2 from organic compounds is mediated by nitrogenase and is nto inhibited by an atmosphere of 99% H2. Cells grown photoheterotrophically on C4 dicarboxylic acids (with glutamate as N source) evolve H2 from the C4 acids and also from ...
متن کاملInorganic nitrogen assimilation by the photosynthetic bacterium Rhodopseudomonas capsulata.
The photosynthetic bacterium Rhodopseudomonas capsulata lacks glutamate dehydrogenase and normally uses the glutamine synthetase/glutamate synthase sequence of reactions for assimilation of N2 and ammonia. The glutamine synthetase in cell-free extracts of the organism is completely sedimented by centrifugation at 140,000 X g for 2 h, is inhibited by L-alanine but not by adenosine 5'-monophospha...
متن کاملNitrate Photo-Assimilation by the Phototrophic Bacterium Rhodopseudomonas capsulata EjFj
Rhodopseudomonas capsulata bacteria photo-assimilated nitrate under anaerobic condi tions, but were incapable of reducing it in the dark. The bacteria utilized dissolved N 2 as nitrogen source, but the growth in the presence of nitrate was 5-fold higher. Nitrite was excreted to the medium, but not stoichiometrically with respect to nitrate consumption. Nitrate reductase is particulate and used...
متن کاملIntegration of energy conversion and biosynthesis in the photosynthetic bacterium Rhodopseudomonas capsulata.
Recent reports from this laboratory described the use of intermittent illumination as a technique for exploring the intimacy of coupling between photophosphorylation activity and biosynthesis in Rhodopseudomonas capsua. 2 In vivo pulsing of adenosine triphosphate (ATP) production at certain frequencies, by programmed intermittent illumination, was found to result in marked inhibition of growth ...
متن کاملCharacterization of a soluble NADH-independent nitrate reductase from the photosynthetic bacterium Rhodopseudomonas capsulata.
The assimilatory nitrate reductase was purified 60-fold from a newly isolated, nitrate assmilating strain of the photosynthetic bacterium Rhodopseudomonas capsulata. The enzyme had a molecular weight of about 180 000 dalton and was typically prokaryotic in that it was not active with reduced pyridine nucleotides but rather with reduced flavins.
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1977
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.129.2.724-731.1977