Acetate threshold values and acetate activating enzymes in methanogenic bacteria
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چکیده
منابع مشابه
Acetate oxidation is the dominant methanogenic pathway from acetate in the absence of Methanosaetaceae.
The oxidation of acetate to hydrogen, and the subsequent conversion of hydrogen and carbon dioxide to methane, has been regarded largely as a niche mechanism occurring at high temperatures or under inhibitory conditions. In this study, 13 anaerobic reactors and sediment from a temperate anaerobic lake were surveyed for their dominant methanogenic population by using fluorescent in situ hybridiz...
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Acetate is a major product of fermentation processes and an important substrate for sulfate reducing bacteria and methanogenic archaea. Most studies on acetate catabolism by sulfate reducers and methanogens have used pure cultures. Less is known about acetate conversion by mixed pure cultures and the interactions between both groups. We tested interspecies hydrogen transfer and coexistence betw...
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Assay System-The assay system, previously described (1, 6, 7), is based on the conversion of acetyl CoA to citrate in the presence of malic dehydrogenase and condensing enzyme. The oxalacetate necessary for the condensation reaction is generated by the oxidation of malate in the presence of DPN, and the rate of DPN reduction is proportional to the concentration of AAE present, within the limits...
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Cell lysates of acetate-grown Methanosarcina barkeri 227 were found to cleave acetate to CH4 and CO2. The aceticlastic reaction was identified by using radioactive methyl-labeled acetate. Cell lysates decarboxylated acetate in a nitrogen atmosphere, conserving the methyl group in methane. The rate of methanogenesis from acetate in the cell lysates was comparable to that observed with whole cell...
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The stimulatory effect of sodium acetate on growth of lactic acid bacteria was first demonstrated by Snell et al. (1). Guirard et al. (2) investigated the role of acetate in the nutrition of certain lactic acid bacteria and showed that acetate serves a dual purpose in media, (a) that of a buffer and (b) that of a probable precursor of various lipides. It was further demonstrated (3) that some b...
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ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 1990
ISSN: 0378-1097,1574-6968
DOI: 10.1111/j.1574-6968.1990.tb03958.x