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  • 1
    Electronic Resource
    Electronic Resource
    Energetics of C1-compound metabolism (1987)
    Springer
    Antonie van Leeuwenhoek 53 (1987), S. 37-45 
    Details
    ISSN: 1572-9699
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00422633
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of crotonate grown Clostridium kluyveri by its assimilatory metabolism (1968)
    Springer
    Archives of microbiology 64 (1968), S. 125-129 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Considerable behavioral differences were observed during growth of Clostridium kluyveri on ethanol-acetate and on crotonate media. The identity of the crotonate grown Clostridium with the ethanol grown Clostridium kluyveri was therefore established by three characteristic biosynthetic routes: 1. ribose is synthesized from CO2 and acetate via pyruvate, triose phosphate and a non-oxidative pentose phosphate pathway, 2. reduced one-carbon units are formed predominantly from CO2 and not from serine as usual, and 3. glutamate biogenesis follows an atypical stereochemical course.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406971
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  • 3
    Electronic Resource
    Electronic Resource
    Demonstration of NADH-ferredoxin reductase in two saccharolytic clostridia (1971)
    Springer
    Archives of microbiology 80 (1971), S. 370-372 
    Details
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406223
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  • 4
    Electronic Resource
    Electronic Resource
    Nickel, a component of factor F 430 from Methanobacterium thermoautotrophicum (1980)
    Springer
    Archives of microbiology 124 (1980), S. 103-106 
    Details
    ISSN: 1432-072X
    Keywords: Methanobacterium thermoautotrophicum ; Nickel ; Factor F 430
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Methanobacterium thermoautotrophicum, growing on medium supplemented with 2 μmol 63NiCl2/l, was found to take up 1.2 μmol 63Ni per g cells (dry weight). More than 70% of the radioisotope was incorporated into a compound, which dissociated from the protein fraction after heat treatment, was soluble in 70% acetone, and could be purified by chromatography on QAE-Sephadex A-25, Sephadex G-25, and DEAE cellulose. The purified 63Ni labelled compound had an absorption spectrum and properties identical to those of factor F 430 and is therefore considered to be identical with factor F 430.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00407036
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  • 5
    Electronic Resource
    Electronic Resource
    Acetate thiokinase and the assimilation of acetate in Methanobacterium thermoautotrophicum (1980)
    Springer
    Archives of microbiology 128 (1980), S. 248-252 
    Details
    ISSN: 1432-072X
    Keywords: Methanobacterium thermoautotrophicum ; Acetate thiokinase ; Acetate kinase ; Phosphotransacetylase ; Succinate thiokinase ; Adenylate kinase ; Inorganic pyrophosphatase ; Acetate assimilation ; Autotrophic CO2 fixation ; P1, P5-di (adenosine-5) pentaphosphate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Methanobacterium thermoautotrophicum growing on H2 plus CO2 as sole carbon and energy source was found to contain acetate thiokinase (Acetyl CoA synthetase; EC 6.2.1.1): Acetate+ATP+CoA → Acetyl CoA+AMP+PPi. The apparent K m value for acetate was 40 μM. Acetate kinase (EC 2.7.2.1) and phosphotransacetylase (EC 2.3.1.8) could not be detected. The specific activity of acetate thiokinase was high in cells grown with limited H2 and CO2 supply (approximately 100nmol/min · mg protein), it was low in exponentially grown cells (2 nmol/min·mg protein). This corresponded with the finding that cells growing linearly in the presence of acetate assimilated the monocarboxylic acid in high amounts (〉10% of the cell carbon was derived from acetate), whereas exponentially growing cells did not (〈1% of cell carbon was derived from acetate). These latter observations indicated that acetate thiokinase and free acetate are not involved in autotrophic CO2 fixation in M. thermoautotrophicum. The presence and some kinetic properties of succinate thiokinase (EC 6.2.1.5), adenylate kinase (EC 2.7.4.3), and inorganic pyrophosphatase (EC 3.6.1.1.) are also described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406167
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  • 6
    Electronic Resource
    Electronic Resource
    Incorporation of 8 succinate per mol nickel into factors F430 by Methanobacterium thermoautotrophicum (1980)
    Springer
    Archives of microbiology 128 (1980), S. 256-262 
    Details
    ISSN: 1432-072X
    Keywords: Factors F430 ; Methanobacterium thermoautotrophicum ; Nickel ; Tetrapyrrole biosynthesis ; Succinate incorporation ; Methanobacterium bryantii
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Factors F430 from methanogenic bacteria have recently been shown to contain nickel and it has been speculated that they may have a nickel tetrapyrrole structure. This assumption was tested by determining whether succinate is incorporated by growing Methanobacterium thermoautotrophicum into three factors F430. Succinate is assimilated by Methanobacterium thermoautotrophicum into the amino acids glutamate, arginine and proline and into tetrapyrroles rather than other cell components. It was found that per mol nickel 8–9 mol of succinate were incorporated into the three factors F430 which is the amount predicted for a tetrapyrrole structure. Since the three factors F430 only contained significant amounts of glutamate rather than arginine or proline, the incorporation data suggest that factors F430 are nickel tetrapyrrole compounds. Spectral properties of the three factors F430, apparent molecular weights, and the absence of phosphor in these compounds are also described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00406169
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  • 7
    Electronic Resource
    Electronic Resource
    Kinetic mechanism for the ability of sulfate reducers to out-compete methanogens for acetate (1982)
    Springer
    Archives of microbiology 132 (1982), S. 285-288 
    Details
    ISSN: 1432-072X
    Keywords: Desulfobacter postgatei ; Methanosarcina barkeri ; K s values for acetate ; Methanogenesis ; Sulfate reduction ; Competition for acetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Methanosarcina barkeri and Desulfobacter postgatei are ubiquitous anaerobic bacteria which grow on acetate or acetate plus sulfate, respectively, as sole energy sources. Their apparent K s values for acetate were determined and found to be approximately 0.2 mM for the sulfate-reducing bacterium and 3 mM for the methanogenic bacterium. In mixed cell suspensions of the two bacteria (adjusted to equal V max) the rate of acetate consumption by D. postgatei approached 15-fold the rate of M. barkeri at low acetate concentrations. The apparent inhibition of methanogenesis was of the same order as expected from the different K s value for acetate. Difference in substrate affinities can thus account for the inhibition of methanogenesis from acetate in sulfate-rich environments, where the acetate concentration is well below 1 mM.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00407967
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  • 8
    Electronic Resource
    Electronic Resource
    Growth yields and saturation constant of Desulfovibrio vulgaris in chemostat culture (1984)
    Springer
    Archives of microbiology 137 (1984), S. 236-240 
    Details
    ISSN: 1432-072X
    Keywords: Desulfovibrio vulgaris ; Dissimilatory sulfate reduction ; Growth yields ; Chemostat cultures ; Pyruvate metabolism ; ATP synthesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Desulfovibrio vulgaris (strain Marburg) was grown on H2 and sulfate as sole energy source in a chemostat limited by the sulfate supply. The biomass concentration and the sulfate concentration in the culture were determined as a function of the dilution rate. From the data a K S (saturation constant) for sulfate of 10 μM, a μmax of 0.23 h−1, and a $${\text{Y}}_{{\text{SO}}_{\text{4}} ^{2 - } }^{{\text{max}}}$$ of 13 g/mol were calculated. The organism was also grown in chemostat culture on H2 and sulfite, H2 and thiosulfate, and pyruvate (without sulfate). $${\text{Y}}_{{\text{SO}}_3 ^{2 - } }^{{\text{max}}}$$ was found to be 35 g/mol, $${\text{Y}}_{{\text{S}}_{\text{2}} {\text{O}}_{\text{3}} ^{2 - } }^{{\text{max}}}$$ 36 g/mol, and Y pyr max 10 g/mol. The growth yields are discussed with respect to ATP gains in dissimilatory sulfate reduction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414550
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  • 9
    Electronic Resource
    Electronic Resource
    Growth the Wolinella succinogenes on H2S plus fumarate and on formate plus sulfur as energy sources (1986)
    Springer
    Archives of microbiology 144 (1986), S. 147-150 
    Details
    ISSN: 1432-072X
    Keywords: Wolinella succinogenes ; Sulfur cycle ; H2S oxidation ; Sulfur reduction ; Fumarate reduction ; Formate oxidation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Wolinella succinogenes was found to grow on H2S plus fumarate with the formation of elemental sulfur and succinate. The growth rate was 0.18 h-1 (t d=3.8 h) and the growth yield was estimated to be 6.0 g per mol fumarate used. Growth also occurred on formate plus elemental sulfur; the products formed were H2S and CO2. The growth rate and estimated growth yield were 0.58 h-1 (t d=1.2 h) and 3.5 g per mol formate used, respectively. These results suggest that certain chemotrophic anaerobes may be involved in both the formation and reduction of sulfur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414725
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  • 10
    Electronic Resource
    Electronic Resource
    ATP-driven succinate oxidation in the catabolism of Desulfuromonas acetoxidans (1986)
    Springer
    Archives of microbiology 144 (1986), S. 78-83 
    Details
    ISSN: 1432-072X
    Keywords: Desulfuromonas acetoxidans ; Succinate oxidation ; Sulphur reduction ; Acetate oxidation ; Citric acid cycle ; Reverse of electron transport ; Menaquinone ; ATP synthase ; Succinate dehydrogenase ; Sulphur reductase ; NADH dehydrogenase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The oxidation of succinate with elemental sulphur in Desulfuromonas acetoxidans was investigated using a membrane preparation of this bacterium. The following results were obtained: 1. The preparation catalyzed the oxidation of succinate with sulphur and NAD. These reactions were dependent on ATP and were abolished by the presence of protonophores or dicyclohexylcarbodiimide (DCCD). 2. The membrane preparation also catalyzed the reduction of fumarate with H2S or with NADH. These activities were not dependent on ATP and were not affected by protonophores or DCCD. 3. By extraction-reincorporation experiments it could be shown that menaquinone is involved in electron transport between H2S and fumarate and between NADH and fumarate. 4. The membrane fraction catalyzed the reduction of the water-soluble menaquinone-analogue dimethylnaphthoquinone (DMN) by succinate, H2S, or NADH, and the oxidation of DMNH2 by fumarate. These activities were not dependent on the presence of menaquinone and were not influenced by ATP. 5. The activities involving succinate oxidation or fumarate reduction were similarly sensitive to 2(n-nonyl)-4-hydroxyquinoline-N-oxide, while H2S and NADH oxidation by DMN were not affected by the inhibitor. It is concluded that the catabolism of D. acetoxidans involves the energy-driven oxidation of succinate with elemental sulphur or NAD as electron acceptors and that menaquinone is a component of the electron transport chain catalyzing these reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00454960
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