Galactofuranosidase from JHA 19 Streptomyces sp. subcloning and biochemical characterization

Mateja Seničar, Laurent Legentil, Vincent Ferrières, Svetlana V. Eliseeva, Stéphane Petoud, Kaoru Takegawa, Pierre Lafite, Richard Daniellou

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)


Despite the crucial role of the rare galactofuranose (Galf) in many pathogenic micro-organisms and our increased knowledge of its metabolism, there is still a lack of recombinant and efficient galactofuranoside hydrolase available for chemo-enzymatic synthetic purposes of specific galactofuranosyl-conjugates. Subcloning of the Galf-ase from JHA 19 Streptomyces sp. and its further overexpression lead us to the production of this enzyme with a yield of 0.5 mg/L of culture. It exhibits substrate specificity exclusively towards pNP β-D-Galf, giving a KM value of 250 μM, and the highest enzymatic efficiency ever observed of 14 mM−1 s−1. It proved to be stable to temperature up to 60 °C and to at least 4 freeze-thaw's cycles. Thus, Galf-ase demonstrated to be an efficient and stable biocatalyst with greatly improved specificity toward the galactofuranosyl entity, thus paving the way to the further development of transglycosylation and thioligation reactions.

ジャーナルCarbohydrate Research
出版ステータス出版済み - 7月 1 2019

!!!All Science Journal Classification (ASJC) codes

  • 分析化学
  • 生化学
  • 有機化学


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