Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Glycosylation of Flavonoids with E. coli Expressing Glycosyltransferase from Xanthomonas campestris

  • Kim, Jeong-Ho (Bio/Molecular Informatics Center, Department of Bioscience and Biotechnology, Konkuk University) ;
  • Kim, Bong-Gyu (Bio/Molecular Informatics Center, Department of Bioscience and Biotechnology, Konkuk University) ;
  • Kim, Jae-Ah (Bio/Molecular Informatics Center, Department of Bioscience and Biotechnology, Konkuk University) ;
  • Park, Young-Hee (Bio/Molecular Informatics Center, Department of Bioscience and Biotechnology, Konkuk University) ;
  • Lee, Yoon-Jung (Bio/Molecular Informatics Center, Department of Bioscience and Biotechnology, Konkuk University) ;
  • Lim, Yoong-Ho (Bio/Molecular Informatics Center, Department of Bioscience and Biotechnology, Konkuk University) ;
  • Ahn, Joong-Hoon (Bio/Molecular Informatics Center, Department of Bioscience and Biotechnology, Konkuk University)
  • Published : 2007.03.31
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Abstract

Glycosyltransferase family 1 (UOT) uses small chemicals including phenolics, antibiotics, and alkaloids as substrates to have an influence in biological activities. A glycosyltransferase (XcGT-2) from Xanthomonas campestris was cloned and consisted of a 1,257 bp open reading frame encoding a 45.5 kDa protein. In order to use this for the modification of phenolic compounds, XcGT-2 was expressed in Escherichia coli as a glutathione S-transferase fusion protein. With the E. coli transformant expressing XcGT-2, biotransformation of flavonoids was carried out. Flavonoids having a double bond between carbons 2 and 3, and hydroxyl groups at both C-3' and C-4', were glycosylated and the glycosylation position was determined to be at the hydroxyl group of C-3', using nuclear magnetic resonance spectroscopy. These results showed that XcGT-2 regiospecifically transferred a glucose molecule to the 3'-hydroxyl group of flavonoids containing both 3' and 4'-hydroxyl groups.

Keywords

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