Pentose Oxidation by Acetic Acid Bacteria Led to a Finding of Membrane-Bound Purine Nucleosidase

  • ADACHI Osao
    Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University
  • HOURS Roque A.
    Research and Development Center for Industrial Fermentation (CINDEFI; UNLP, CONICET La Plata), School of Science, La Plata National University
  • AKAKABE Yoshihiko
    Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University
  • SHINAGAWA Emiko
    Department of Chemical and Biological Engineering, Ube National College of Technology
  • ANO Yoshitaka
    Department of Applied Bioscience, Faculty of Agriculture, Ehime University
  • YAKUSHI Toshiharu
    Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University
  • MATSUSHITA Kazunobu
    Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University

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D-Ribose and 2-deoxy-D-ribose were oxidized to 4-keto-D-ribonate and 2-deoxy-4-keto-D-ribonate respectively by oxidative fermentation, and the chemical structures of the oxidation products were confirmed to be as expected. Both pentoses are important sugar components of nucleic acids. When examined, purine nucleosidase activity predominated in the membrane fraction of acetic acid bacteria. This is perhaps the first finding of membrane-bound purine nucleosidase.

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