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Ensifer adhaerens CAS22-03 fermentation process optimization and enzymatic preparation of D-p-HPG

  • HE Ran-Feng ,
  • YANG Yu ,
  • SONG Xian-Bing ,
  • LI Xiao-Lian ,
  • WANG Zi-Qiang ,
  • WANG Peng ,
  • WANG Yun-Shan
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  • 1. School of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China 2. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 3. Key Laboratory of Biopharmaceutical Preparation and Delivery (Chinese Academy of Sciences), Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 4. College of Life Sciences, Hebei University, Baoding, Hebei 071002, China

Received date: 2024-01-29

  Revised date: 2024-03-21

  Online published: 2024-09-23

Abstract

In order to study the influence factors of the expression activities of D-Hydantoinase (D-Hase) and N-Carbamoyl hydrolase (D-Case) from Ensifer adhaerens CAS22-03, and to improve the catalytic efficiency of the whole-cell catalyzed preparation of D-p-Hydroxyphenylglycine (D-p-HPG) by Ensifer adhaerens CAS22-03, the single factor test and orthogonal test were adopted to optimize the carbon and nitrogen sources, and the fed-batch fermentation process of Ensifer adhaerens CAS22-03 was established. The enzymatic properties of D-Hase and D-Case were analyzed, and the D-p-HPG enzymatic production process based on the whole cell catalysis of Ensifer adhaerens CAS22-03 was developed. The results showed that the optimal carbon and nitrogen sources for Ensifer adhaerens CAS22-03 fermentation were sucrose and yeast extract. In the fed-batch fermentation process, the activities of D-Hase and D-Case were up to 243.6 and 55.8 U/g, which were increased by 56.9% and 46.4%, respectively. The optimal reaction temperature of D-Hase and D-Case is 45℃, and the optimal reaction pH is 9 and 8 respectively. In the process of the whole-cell catalytic preparation of D-p-HPG by Ensifer adhaerens CAS22-03, when the substrate concentration was 40 g/L and the enzyme dosage was substrate:bacterium=5:1, the substrate conversion reached more than 95% with the condition of 40℃ and 200 r/min for 10 h, laying the foundation for the industrial enzymatic production of D-p-HPG.

Cite this article

HE Ran-Feng , YANG Yu , SONG Xian-Bing , LI Xiao-Lian , WANG Zi-Qiang , WANG Peng , WANG Yun-Shan . Ensifer adhaerens CAS22-03 fermentation process optimization and enzymatic preparation of D-p-HPG[J]. The Chinese Journal of Process Engineering, 2024 , 24(9) : 1096 -1105 . DOI: 10.12034/j.issn.1009-606X.224040

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