Volatilization of Metal Mercury from Organomercurials by Highly Mercury-Resistant Acidithiobacillus ferrooxidans MON-1

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概要

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• The iron-oxidizing bacterium Acidithiobacillus ferrooxidans MON-1 is highly resistant not only to mercuric chloride (HgCl2) but also to organomercurials such as methylmercury chloride (MMC). We have found that cytochrome c oxidase, purified from strain MON-1, reduces Hg2+ to volatilizable metal mercury (Hg0) with reduced mammalian cytochrome c or Fe2+ as an electron donor. In this study we found that cytochrome c oxidase can volatilize Hg0 from MMC as well as from Hg2+ with reduced mammalian cytochrome c or c-type cytochrome purified from strain MON-1 as an electron donor. We also found that MMC-Hg0 volatilization activity is present in the MON-1 plasma membrane but not in the cytosol. These activities were strongly inhibited by sodium cyanide (NaCN) and the antibody produced against purified MON-1 cytochrome c oxidase. This is the first report to indicate that cytochrome c oxidase is involved in the degradation of organomercurials in microorganisms.

• 2010-05-23

著者

• Sugio Tsuyoshi

  Division of Bioscience, The Graduate School of Natural Science and Technology, Okayama University

• Okazaki Yuko

  Faculty of Agriculture, Okayama University

• TAKEDA Yuki

  Faculty of Agriculture, Okayama University

• NAKAMURA Sousaku

  Division of Bioscience, The Graduate School of Natural Science and Technology, Okayama University

• TAKEUCHI Fumiaki

  Environmental Management Center, Okayama University

• Sugio Tsuyoshi

  Division Of Biological Function And Genetic Resources Science Faculty Of Agriculture Okayama Univers

• Takeuchi Fumiaki

  Environmental Management Center Okayama Univ.

• Komoda Tomoe

  Faculty Of Agriculture Okayama University

• Sugio Tsuyoshi

  Division Of Bioscience The Graduate School Of Natural Science And Technology Okayama University

• Takeuchi Fumiaki

  Environmental Management Center Okayama University

• Okazaki Yuko

  Faculty Of Agriculture Okayama University

• Takeda Yuki

  Faculty Of Agriculture Okayama University

• Nakamura Sousaku

  Division Of Bioscience The Graduate School Of Natural Science And Technology Okayama University

• TAKEUCHI Fumiaki

  Environmental Management and Safety Section, Health and Environment Center, Okayama University

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