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- W2013105435 abstract "Recently, Pseudomonas putida revealed excellent properties as production host for the expression of a natural product gene cluster from myxobacteria, encoding the myxochromide biosynthetic pathway. Here we present a physiological study of the mutant P. putida::CMch37a for the production of this compound. Feeding of alanine, leucine, glutamine, and threonine as building blocks of the cyclic peptide of myxochromides S led to 5-fold increase of production. This improvement was due to increased intracellular levels of these amino acids, as response to the feeding, thus optimizing their availability for the non-ribosomal peptide synthetases from the myxochromide assembly line. As shown by 13C labelling studies, amino acids incorporated into myxochromides S originated predominantly from the externally added pools, whereas de novo synthesis from glucose was very low. Alanine, leucine and glutamine were, however, catabolized to a large extent, which reduces the efficiency of their feeding. Acetate and malonate, as building blocks of the polyketide chain of myxochromide, however, inhibited growth of P. putida::CMch37a and partly reduced myxochromide production. The effective co-utilization of acetate in a mixture with glucose indicated the presence of a highly active acetyl-CoA synthase. The fact that this was not reflected by an increased myxochromide production speaks against a limitation of production, caused by this enzyme. Malonate was not co-consumed with glucose so that malonyl-CoA synthase remains as a potential bottleneck for myxochromide production in P. putida." @default.
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- W2013105435 date "2006-10-01" @default.
- W2013105435 modified "2023-10-17" @default.
- W2013105435 title "Metabolic physiology of Pseudomonas putida for heterologous production of myxochromide" @default.
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- W2013105435 doi "https://doi.org/10.1016/j.procbio.2006.06.022" @default.
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