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Pathway of anaerobic poly-beta-hydroxybutyrate degradation by Ilyobacter delafieldii

Pathway of anaerobic poly-beta-hydroxybutyrate degradation by Ilyobacter delafieldii


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JANSSEN, Peter H., Bernhard SCHINK, 1993. Pathway of anaerobic poly-beta-hydroxybutyrate degradation by Ilyobacter delafieldii. In: Biodegradation. 4(3), pp. 179-185. ISSN 0923-9820. eISSN 1572-9729

@article{Janssen1993Pathw-8572, title={Pathway of anaerobic poly-beta-hydroxybutyrate degradation by Ilyobacter delafieldii}, year={1993}, doi={10.1007/BF00695120}, number={3}, volume={4}, issn={0923-9820}, journal={Biodegradation}, pages={179--185}, author={Janssen, Peter H. and 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/123456789/8572"> <dcterms:abstract xml:lang="deu">Ilyobacter delafieldii produced an extracellular poly-[3-hydroxybutyrate (PHB) depolymerase when grown on PHB; activity was not detected in cultures grown on 3-hydroxybutyrate, crotonate, pyruvate or lactate. PHB depolymerase activity was largely associated with the PHB granules (supplied as growth substrate), and only 16 % was detected free in the culture supernatant. Monomeric 3-hydroxybutyrate was detectable as a product of depolymerase activity. The monomer was fermented to acetate, butyrate and H 2. After activation by coen- zyme A transfer from acetyl-CoA or butyryl-CoA, the resultant 3-hydroxybutyryl-CoA was oxidized to ace-toacetyl-CoA (producing NADH), followed by thiolytic cleavage to yield acetyl-CoA which was further me-tabolized to acetyl-phosphate, then to acetate with concomitant ATP production. The reducing equivalents (NADH) could be disposed of by the evolution of H 2, or by a reductive pathway in which 3-hydroxybutyryl-CoA was dehydrated to crotonyl-CoA and reduced to butyryl-CoA. In cocultures of I. delafieldii with Des-ulfovibrio vulgaris on PHB, the H 2 partial pressure was much lower than in the pure cultures, and sulfide was produced. Thus interspecies hydrogen transfer caused a shift to increased acetate and H 2 production at the expense of butyrate.</dcterms:abstract> <dcterms:rights rdf:resource="https://creativecommons.org/licenses/by-nc-nd/2.0/legalcode"/> <dc:language>eng</dc:language> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:44:47Z</dc:date> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/8572"/> <dcterms:title>Pathway of anaerobic poly-beta-hydroxybutyrate degradation by Ilyobacter delafieldii</dcterms:title> <dc:rights>deposit-license</dc:rights> <dcterms:issued>1993</dcterms:issued> <dcterms:bibliographicCitation>First publ. in: Biodegradation 4 (1993), 3, S. 179-185</dcterms:bibliographicCitation> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-03-24T17:44:47Z</dcterms:available> <dc:creator>Schink, Bernhard</dc:creator> <dc:creator>Janssen, Peter H.</dc:creator> <dc:contributor>Janssen, Peter H.</dc:contributor> <dc:format>application/pdf</dc:format> <dc:contributor>Schink, Bernhard</dc:contributor> </rdf:Description> </rdf:RDF>

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