Anaerobic degradation of isovalerate by a defined methanogenic coculture


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STIEB, Marion, Bernhard SCHINK, 1986. Anaerobic degradation of isovalerate by a defined methanogenic coculture. In: Archives of Microbiology. 144(3), pp. 291-295. ISSN 0302-8933. eISSN 1432-072X

@article{Stieb1986Anaer-7687, title={Anaerobic degradation of isovalerate by a defined methanogenic coculture}, year={1986}, doi={10.1007/BF00410965}, number={3}, volume={144}, issn={0302-8933}, journal={Archives of Microbiology}, pages={291--295}, author={Stieb, Marion and Schink, Bernhard} }

<rdf:RDF xmlns:rdf="" xmlns:bibo="" xmlns:dc="" xmlns:dcterms="" xmlns:xsd="" > <rdf:Description rdf:about=""> <dcterms:abstract xml:lang="eng">Isovalerate-oxidizing strictly anaerobic bacteria were isolated from marine sediment and sewage sludge in coculture with Desulfovibrio sp. Cells stained Gram positive and behaved Gram positive also in Gram classification with KOH. Isovalerate degradation depended on interspecies hydrogen transfer to syntrophic hydrogen-oxidizing sulfate reducers or methanogens. Isovalerate was the only substrate utilized and was fermented to 3 mol acetate and 1 mol hydrogen per mol substrate. The degradation pathway was studied by enzyme assays in crude cell extracts, and included acetyl-CoA dependent activation of isovalerate, oxidation to methylcrotonyl-CoA and carboxylation to methylglutaconyl- CoA which is hydrated and cleaved to acetoacetate and acetyl-CoA. Studies with inhibitors and ionophores suggest that energy conservation with this organism depends on either acetate effiux-driven proton symport or on an iongradient driven carboxylation mechanism.</dcterms:abstract> <dc:rights>deposit-license</dc:rights> <bibo:uri rdf:resource=""/> <dc:format>application/pdf</dc:format> <dcterms:bibliographicCitation>First publ. in: Archives of Microbiology 144 (1986), 3, pp. 291-295</dcterms:bibliographicCitation> <dc:language>eng</dc:language> <dcterms:rights rdf:resource=""/> <dc:creator>Stieb, Marion</dc:creator> <dc:date rdf:datatype="">2011-03-24T17:36:24Z</dc:date> <dcterms:title>Anaerobic degradation of isovalerate by a defined methanogenic coculture</dcterms:title> <dc:contributor>Stieb, Marion</dc:contributor> <dcterms:issued>1986</dcterms:issued> <dc:contributor>Schink, Bernhard</dc:contributor> <dcterms:available rdf:datatype="">2011-03-24T17:36:24Z</dcterms:available> <dc:creator>Schink, Bernhard</dc:creator> </rdf:Description> </rdf:RDF>

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