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- W2038624513 abstract "In this work, Escherichia coli was engineered to produce a medically valuable cofactor, coenzyme Q10 (CoQ10), by removing the endogenous octaprenyl diphosphate synthase gene and functionally replacing it with a decaprenyl diphosphate synthase gene from Sphingomonas baekryungensis. In addition, by over-expressing genes coding for rate-limiting enzymes of the aromatic pathway, biosynthesis of the CoQ10 precursor para-hydroxybenzoate (PHB) was increased. The production of isoprenoid precursors of CoQ10 was also improved by the heterologous expression of a synthetic mevalonate operon, which permits the conversion of exogenously supplied mevalonate to farnesyl diphosphate. The over-expression of these precursors in the CoQ10-producing E. coli strain resulted in an increase in CoQ10 content, as well as in the accumulation of an intermediate of the ubiquinone pathway, decaprenylphenol (10P-Ph). In addition, the over-expression of a PHB decaprenyl transferase (UbiA) encoded by a gene from Erythrobacter sp. NAP1 was introduced to direct the flux of DPP and PHB towards the ubiquinone pathway. This further increased CoQ10 content in engineered E. coli, but decreased the accumulation of 10P-Ph. Finally, we report that the combined over-production of isoprenoid precursors and over-expression of UbiA results in the decaprenylation of para-aminobenzoate, a biosynthetic precursor of folate, which is structurally similar to PHB." @default.
- W2038624513 created "2016-06-24" @default.
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- W2038624513 date "2011-11-01" @default.
- W2038624513 modified "2023-09-23" @default.
- W2038624513 title "Identification of bottlenecks in Escherichia coli engineered for the production of CoQ10" @default.
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- W2038624513 doi "https://doi.org/10.1016/j.ymben.2011.09.009" @default.
- W2038624513 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21986057" @default.
- W2038624513 hasPublicationYear "2011" @default.
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