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pubmed-article:11759685pubmed:abstractTextThe production of adipoyl-7-aminodeacetoxy-cephalosporanic acid (ad-7-ADCA) was studied, using two recombinant strains of Penicillium chrysogenum carrying the expandase gene from Streptomyces clavuligerus. The adipoyl-side chain of this compound may easily be removed using an amidase; and this process therefore represents a new route for the production of 7-ADCA, which serves as a precursor for the production of many semi-synthetic cephalosporins. In this study, one low- and one high-yielding strains were characterised and the specific productivities of ad-7-ADCA and byproducts of the biosynthetic pathway were compared. The fluxes through the biosynthetic pathway were quantified and it was found that there was a 30% higher flux through the expandase in the high-yielding strain. In both strains, there was a significant degradation of adipate. Furthermore, the initial adipate concentration in batch cultures was shown to have a positive effect on the formation of ad-7-ADCA.lld:pubmed
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pubmed-article:11759685pubmed:articleTitlePhysiological characterisation of Penicillium chrysogenum strains expressing the expandase gene from Streptomyces clavuligerus during batch cultivations. Growth and adipoyl-7-aminodeacetoxycephalosporanic acid production.lld:pubmed
pubmed-article:11759685pubmed:affiliationCentre for Process Biotechnology, Biocentrum-DTU, Technical University of Denmark, Lyngby.lld:pubmed
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pubmed-article:11759685pubmed:publicationTypeComparative Studylld:pubmed
pubmed-article:11759685pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed