Ytterbium-Decreasing Streptomyces sp.and Its Naphthoquinone-Pigment Production in the Presence of Rare-Earth Elements

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概要

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• We screened for oligotrophic microorganisms capable of decreasing the concentration of ytterbium(Yb), a representative of the heavy rare-earth elements, in a culture medium. From 476 strains of oligotrophic microorganisms(grown on 1/100 diluted nutrient agar)isolated from soil and river water samples, 5 strains capable of reducing the concentration of Yb in diluted nutrient broth containing 5 ppm Yb were selected. Among them, a strain capable of reducing the concentration of all rare-earth elements to a great extent was identified as Streptomyces sp.(strain YB-1). This strain produced redish-purple pigment(s)only in the presence of rare earths, but not in that of other metals. The pigment was extracted with ethyl acetate and purified by a series of column chromatography steps. From the results of structural analysis using ultraviolet or infrared absorption spectrometry and ^13C-NMR, the pigment was determined to be a kind of naphthoquinone similar to nanaomycin produced by a Streptomyces sp. These results suggested that rare earths might affect the physiological activity of this strain.

• 1999-03-25

著者

• Kawai K

  Faculty Of Applied Biological Sciences Gifu University

• Suzuki T

  Life Science Research Center Gifu University:faculty Of Applied Biological Sciences Gifu University

• SUZUKI TOHRU

  Department of Chemical Engineering, Faculty of Engineering, Nagoya University

• Kawai Keiichi

  Department of Biotechnology, Division of Bioresources Utilization, Faculty of Agriculture, Gifu Univ

• Suzuki T

  Laboratory Of Microbial Biochemistry Institute For Chemical Research Kyoto University

• So Tomoko

  Second Department Of Surgery Faculty Of Medicine University Of Occupational And Environmental Health

• So Tetsuya

  Second Department Of Surgery School Of Medicine University Of Occupational And Environmental Health

• Kawai K

  Fac. Appl. Biol. Sci. Gifu Univ.

• Murase Hironobu

  CCI Corporation

• Murase H

  Cci Corporation

• Murase Hironobu

  Cci Co.

• KAMIJO MANJIROH

  The United Graduate School of Agricultural Science, Gifu University

• FUJII TOSHIAKI

  CCI Corporation

• SUZUKI Tohru

  Faculty of Applied Biological Sciences, Gifu University

• Kawai Keiichi

  Fac. Appl. Biol. Sci. Gifu Univ.

• Kawai Keiichi

  Department Of Bioresources Utilization Faculty Of Agriculture Gifu University

• Kamijo Manjiroh

  The United Graduate School Of Agricultural Science Gifu University

• KAWAI Keiichi

  Department of Agricultural Chemistry, Faculty of Agriculture, Gifu University

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