Abstract
Objectives
In general, a sufficient supply of ATP can promote the synthesis of ATP-driven metabolites, but excessive ATP will lead to the inhibition of cell growth. For enhancing the co-production of glutathione(GSH) and S-adenosylmethionine(SAM), a dynamic ATP regeneration strategy was developed.
Results
The novel ATP regeneration strategy consisting of ATP-sensing riboswitch ydaO motif, polyphosphate kinase (PPK), and Vitreoscilla hemoglobin (VHb) was successfully applied in Escherichia coli. The intracellular ATP level was always around 0.60 mg/g dry cell weight during the fermentation process, resulting in significantly enhanced co-production of GSH and SAM. The GSH titer and SAM titer in the strain CGS-2 increased by 137.40% and 82.18% after fermentation for 24 h, compared with the control strain.
Conclusions
The ATP regulation strategy is expected to be a favorable tool to improve the efficiency of microbial cell factories. The proposed ATP dynamic regeneration approach may be applicable for cost-effective, high-yield production of ATP-driven metabolites.
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This study was funded by the National Natural Science Foundation of China (21606073).
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Chen, Y.W., Liao, Y., Kong, W.Z. et al. ATP dynamic regeneration strategy for enhancing co-production of glutathione and S-adenosylmethionine in Escherichia coli. Biotechnol Lett 42, 2581–2587 (2020). https://doi.org/10.1007/s10529-020-02989-9
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DOI: https://doi.org/10.1007/s10529-020-02989-9