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• W3136263867 abstract "Abstract Background The alcohol 2,3-butanediol (2,3-BDO) is an important chemical and an Escherichia coli producer strain was recently engineered for bio-based production of 2,3-BDO. However, further improvements are required for realistic applications. Results Here we report that enforced ATP wasting, implemented by overexpressing the genes of the ATP-hydrolyzing F 1 -part of the ATPase, leads to significant increases of yield and especially of productivity of 2,3-BDO synthesis in an E. coli producer strain under various cultivation conditions. We studied aerobic and microaerobic conditions as well as growth-coupled and growth-decoupled production scenarios. In all these cases, the specific substrate uptake and 2,3-BDO synthesis rate (up to sixfold and tenfold higher, respectively) were markedly improved in the ATPase strain compared to a control strain. However, aerobic conditions generally enable higher productivities only with reduced 2,3-BDO yields while high product yields under microaerobic conditions are accompanied with low productivities. Based on these findings we finally designed and validated a three-stage process for optimal conversion of glucose to 2,3-BDO, which enables a high productivity in combination with relatively high yield. The ATPase strain showed again superior performance and finished the process twice as fast as the control strain and with higher 2,3-BDO yield. Conclusions Our results demonstrate the high potential of enforced ATP wasting as a generic metabolic engineering strategy and we expect more applications to come in the future." @default.
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• W3136263867 date "2021-03-09" @default.
• W3136263867 modified "2023-10-17" @default.
• W3136263867 title "Increasing ATP turnover boosts productivity of 2,3-butanediol synthesis in Escherichia coli" @default.
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• W3136263867 doi "https://doi.org/10.1186/s12934-021-01554-x" @default.
• W3136263867 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7941745" @default.
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• W3136263867 hasPublicationYear "2021" @default.
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