Abstract
Objectives
To enhance succinic acid production in Corynebacterium glutamicum by increasing the supply of NADH and the rate of glucose consumption by decreasing H+-ATPase activity.
Results
A mutant of C. glutamicum NC-3-1 with decreased H+-ATPase activity was constructed. This increased the rate of glycolysis and the supply of NADH. Fermentation of C. glutamicum NC-3-1 gave 39 % higher succinic acid production (113 and 81 g/l), a 29 % higher succinic acid yield (0.94 and 0.73 g succinic acid/g glucose) and decreased by-products formation compared to that of C. glutamicum NC-3 in 5 l bioreactor.
Conclusion
The point mutation in C. glutamicum NC-3-1 increased the rate of glycolysis and resulted in higher succinic acid production, higher succinic acid yield and significantly decreased formation of by-products.
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Acknowledgments
This work was supported by the 973 Program of China (grant no. 2011CB707405).
Supporting information
Anaerobic succinic acid production in a seated bottle.
Anaerobic succinic acid production in a 5 l bioreactor.
Supplementary Table 1—Sequences of oligonucleotide primers.
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Xu, H., Zhou, Z., Wang, C. et al. Enhanced succinic acid production in Corynebacterium glutamicum with increasing the available NADH supply and glucose consumption rate by decreasing H+-ATPase activity. Biotechnol Lett 38, 1181–1186 (2016). https://doi.org/10.1007/s10529-016-2093-4
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DOI: https://doi.org/10.1007/s10529-016-2093-4