Journal of Microbiology and Biotechnology

  • 제28권2호
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  • Pages.255-261
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  • 2018
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  • 1017-7825(pISSN)
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  • 1738-8872(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
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Complete Biotransformation of Protopanaxatriol-Type Ginsenosides in Panax ginseng Leaf Extract to Aglycon Protopanaxatriol by β-Glycosidases from Dictyoglomus turgidum and Pyrococcus furiosus

  • Yang, Eun-Joo (Department of Bioscience and Biotechnology, Konkuk University) ;
  • Shin, Kyung-Chul (Department of Bioscience and Biotechnology, Konkuk University) ;
  • Lee, Dae Young (Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, RDA) ;
  • Oh, Deok-Kun (Department of Bioscience and Biotechnology, Konkuk University)
  • 투고 : 2017.09.25
  • 심사 : 2017.11.24
  • 발행 : 2018.02.28
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초록

Aglycon protopanaxatriol (APPT) has valuable pharmacological effects such as memory enhancement and tumor inhibition. ${\beta}$-Glycosidase from the hyperthermophilic bacterium Dictyoglomus turgidum (DT-bgl) hydrolyzes the glucose residues linked to APPT, but not other glycoside residues. ${\beta}$-Glycosidase from the hyperthermophilic bacterium Pyrococcus furiosus (PF-bgl) hydrolyzes the outer sugar at C-6 but not the inner glucose at C-6 or the glucose at C-20. Thus, the combined use of DT-bgl and PF-bgl is expected to increase the biotransformation of PPT-type ginsenosides to APPT. We optimized the ratio of PF-bgl to DT-bgl, the concentrations of substrate and enzyme, and the reaction time to increase the biotransformation of ginsenoside Re and PPT-type ginsenosides in Panax ginseng leaf extract to APPT. DT-bgl combined with PF-bgl converted 1.0 mg/ml PPT-type ginsenosides in ginseng leaf extract to 0.58 mg/ml APPT without other ginsenosides, with a molar conversion of 100%. We achieved the complete biotransformation of ginsenoside Re and PPT-type ginsenosides in ginseng leaf extract to APPT by the combined use of two ${\beta}$-glycosidases, suggesting that discarded ginseng leaves can be used as a source of the valuable ginsenoside APPT. To the best of our knowledge, this is the first quantitative production of APPT using ginsenoside Re, and we report the highest concentration and productivity of APPT from ginseng extract to date.

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참고문헌

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피인용 문헌

  1. Biotransformation of Glycoginsenosides to Intermediate Products and Aglycones using a Hemicellulosome Produced by Cellulosimicrobium cellulan vol.55, pp.2, 2019, https://doi.org/10.1134/s0003683819020054