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- W2010200303 abstract "Alkanes and alkenes are ideal biofuels, due to their high energy content and ability to be safely transported. To date, fatty acid-derived pathways for alkane and alkene bioproduction have been thoroughly explored. In this study, we engineered the pathway of the iterative Type I polyketide synthase (PKS) SgcE with the cognate thioesterase (TE) SgcE10 in Escherichia coli, with the goal of overproducing pentadecaheptaene (PDH) followed by its hydrogenation to pentadecane (PD). Based on initial in vitro titration assays, we learned that PDH production is strongly dependent on the SgcE10:SgcE ratio. Thus, we engineered a high-yield E. coli strain by fine-tuning SgcE10 expression via synthetic promoters. We analyzed engineered E. coli strains using a modified multiple reactions monitoring mass spectrometry (MRM-MS)-based targeted proteomic approach, using a chimeric SgcE10 and SgcE fusion construct to gain insight into expression levels of the two proteins. Lastly, through fed-batch fermentation followed by flow chemical hydrogenation, we obtained a PD yield of nearly 140 mg/L in single-alkane form. Thus, we not only employed a metabolic engineering approach to the iterative polyketide pathway, we highlighted the potential of PKS shunt products to play a role in the production of single-form and high-value chemicals." @default.
- W2010200303 created "2016-06-24" @default.
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- W2010200303 date "2015-03-01" @default.
- W2010200303 modified "2023-10-16" @default.
- W2010200303 title "Engineering an iterative polyketide pathway in Escherichia coli results in single-form alkene and alkane overproduction" @default.
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- W2010200303 doi "https://doi.org/10.1016/j.ymben.2014.12.004" @default.
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