Energetics of syntrophic cooperation in methanogenic degradation

Zitieren

Dateien zu dieser Ressource

Prüfsumme: MD5:0c77fe83ff8d0f2844880dcaf72af7af

SCHINK, Bernhard, 1997. Energetics of syntrophic cooperation in methanogenic degradation. In: Microbiology and Molecular Biology Reviews. 61(2), pp. 262-280

@article{Schink1997Energ-8748, title={Energetics of syntrophic cooperation in methanogenic degradation}, year={1997}, number={2}, volume={61}, journal={Microbiology and Molecular Biology Reviews}, pages={262--280}, author={Schink, Bernhard} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/8748"> <dcterms:issued>1997</dcterms:issued> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:46:09Z</dcterms:available> <dcterms:title>Energetics of syntrophic cooperation in methanogenic degradation</dcterms:title> <dc:creator>Schink, Bernhard</dc:creator> <dcterms:abstract xml:lang="eng">Fatty acids and alcohols are key intermediates in the methanogenic degradation of organic matter, e.g., in anaerobic sewage sludge digestors or freshwater lake sediments. They are produced by classical fermenting bacteria for disposal of electrons derived in simultaneous substrate oxidations. Methanogenic bacteria can degrade primarily only one-carbon compounds. Therefore, acetate, propionate, ethanol, and their higher homologs have to be fermented further to one-carbon compounds. These fermentations are called secondary or syntrophic fermentations. They are endergonic processes under standard conditions and depend on intimate coupling with methanogenesis. The energetic situation of the prokaryotes cooperating in these processes is problematic: the free energy available in the reactions for total conversion of substrate to methane attributes to each partner amounts of energy in the range of the minimum biochemically convertible energy, i.e., 20 to 25 kJ per mol per reaction. This amount corresponds to one-third of an ATP unit and is equivalent to the energy required for a monovalent ion to cross the charged cytoplasmic membrane. Recent studies have revealed that syntrophically fermenting bacteria synthesize ATP by substrate-level phosphorylation and reinvest part of the ATP-bound energy into reversed electron transport processes, to release the electrons at a redox level accessible by the partner bacteria and to balance their energy budget. These findings allow us to understand the energy economy of these bacteria on the basis of concepts derived from the bioenergetics of other microorganisms.</dcterms:abstract> <dcterms:rights rdf:resource="https://creativecommons.org/licenses/by-nc-nd/2.0/legalcode"/> <dc:contributor>Schink, Bernhard</dc:contributor> <dc:rights>deposit-license</dc:rights> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/8748"/> <dc:format>application/pdf</dc:format> <dc:language>eng</dc:language> <dcterms:bibliographicCitation>First publ. in: Microbiology and Molecular Biology Reviews 61 (1997), 2, pp. 262-280</dcterms:bibliographicCitation> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:46:09Z</dc:date> </rdf:Description> </rdf:RDF>

Dateiabrufe seit 01.10.2014 (Informationen über die Zugriffsstatistik)

Energetics_of_Syntrophic_Cooperation_in_1997.pdf 97

Das Dokument erscheint in:

deposit-license Solange nicht anders angezeigt, wird die Lizenz wie folgt beschrieben: deposit-license

KOPS Suche


Stöbern

Mein Benutzerkonto