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High production of optically pure (3R)-acetoin by a newly isolated marine strain of Bacillus subtilis CGMCC 13141

  • Jianying Dai
  • Zhuangfei Wang
  • Zhi-Long Xiu
Research Paper
  • 13 Downloads

Abstract

Acetoin is one of the bio-based platform chemicals and its optically pure isomers are important potential intermediates and precursors in the synthesis of novel optically active materials. (3R)-acetoin could be synthesized via enzymatic catalysis, whole-cell catalysis and fermentation. In this study a marine strain of Bacillus subtilis was isolated to produce optically pure (3R)-acetoin with glucose as carbon source. The effects of nutrients on the formation of (3R)-acetoin and conversion of glucose to (3R)-acetoin were evaluated by Plackett–Burman design, and the fermentation medium was optimized by central composite design. The impact of oxygen supply on the production of (3R)-acetoin was studied at different aeration rates. Under the optimal conditions, 83.7 g/L (3R)-acetoin with an optical purity of 99.4% was achieved by fed-batch fermentation, and the conversion of glucose to (3R)-acetoin was 91.5% of the theoretical value. The results indicate the industrial potential of this strain for (3R)-acetoin production via fermentation.

Keywords

(3R)-Acetoin Medium optimization Oxygen availability Marine bacteria 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant no. 21476042).

Compliance with ethical standards

Conflict of interest

The authors have declared no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Life Science and BiotechnologyDalian University of TechnologyDalianPeople’s Republic of China

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