3 Biotech

, 9:258 | Cite as

Identification of novel glycoside hydrolases via whole genome sequencing of Niabella ginsenosidivorans for production of various minor ginsenosides

  • Muhammad Zubair Siddiqi
  • Majid S. Hashmi
  • Jung-Mi Oh
  • Sungkun Chun
  • Wan-Taek ImEmail author
Original Article


In this study, many bacterial strains were screened for the production of minor ginsenosides, but based on conversion competence among the strains, the strain Niabella ginsenosidivorans BS26T has the good ginsenoside-transforming ability. Therefore, the strain BS26T was selected for complete genome sequence analysis to determine the target (glycoside hydrolase) functional genes. Whole genome analysis of strain BS26T showed 43 glycoside hydrolase genes in total. To determine the target functional gene, 12 sets of six different glycoside hydrolases (3 set of β-glucosidase; 3 set of trehalase; 3 set of arabinofuranosidase; 2 set of xylosidase; and one set of each α-galactosidase and α-fucosidase, respectively) were selected and cloned in E. coli BL21 (DE3) using the pGEX4T-1 vector and were characterized. Among these 12 sets of clones, only one, β-glucosidase (BglNg-767), showed ginsenoside conversion ability. The BglNg-767 comprised 767 amino acids and belonged to glycoside hydrolase family 3 (GH3). The recombinant GST-BglNg-767 was capable of altering the ginsenosides Rb1, Rd, and gypenoside XVII (Gyp-XVII) to F2; Rb2 to C–O; Rb3 to C-Mx1, and Rc to C-Mc1. Besides, complete genome sequence analysis of strain BS26T also indicates 30 endopeptidase genes, which may be responsible for self-hydrolysis of the proteins. Therefore, using SDS-PAGE analysis, we predict that the difference between the molecular weight of the expressed protein (around 90 kDa) and the predicted amino-acid sequence (102.7 kDa) is due to self-hydrolysis of the proteins.


Niabella ginsenosidivorans Whole genome sequencing Bioconversion Ginsenosides Recombinant β-glucosidase 



This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2018R1D1A1B07045774) and by a grant from the National Institute of Biological Resources (NIBR), funded by the Ministry of Environment (MOE) of the Republic of Korea (NIBR201827103).

Compliance with ethical standards

Conflict of interest

The authors declare that there are no conflict of interest.


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Copyright information

© King Abdulaziz City for Science and Technology 2019

Authors and Affiliations

  • Muhammad Zubair Siddiqi
    • 1
    • 2
  • Majid S. Hashmi
    • 3
  • Jung-Mi Oh
    • 4
  • Sungkun Chun
    • 4
  • Wan-Taek Im
    • 1
    • 2
    Email author
  1. 1.Department of BiotechnologyHankyong National UniversityAnseong-siRepublic of Korea
  2. 2.AceEMzyme Co., Ltd., Room 403Academic Industry CooperationAnseong-siRepublic of Korea
  3. 3.Department of Food Science and Technology Faculty of Nutrition SciencesThe University of AgriculturePeshawarPakistan
  4. 4.Department of Physiology, Medical SchoolChonbuk National UniversityJeonjuRepublic of Korea

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