Reduction of Hg^<2+> with Reduced Mammalian Cytochrome c by Cytochrome c Oxidase Purified from a Mercury-Resistant Acidithiobacillus ferrooxidans Strain, MON-1
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概要
- 論文の詳細を見る
Acidithiobacillus ferrooxidans AP19-3, ATCC 23270, and MON-1 are mercury-sensitive, moderately mercury-resistant, and highly mercury-resistant strains respectively. It is known that 2,3,5,6-tetramethyl-p-phenylendiamine (TMPD) and reduced cytochrome c are used as electron donors specific for cytochrome c oxidase. Resting cells of strain MON-1 had TMPD oxidase activity and volatilized metal mercury with TMPD as an electron donor. Cytochrome c oxidase purified from strain MON-1 reduced mercuric ions to metalic mercury with reduced mammalian cytochrome c as well as TMPD. These mercury volatilization activities with reduced cytochrome c and TMPD were completely inhibited by 1 mM NaCN. These results indicate that cytochrome c oxidase is involved in mercury reduction in A. ferrooxidans cells. The cytochrome c oxidase activities of strains AP19-3 and ATCC 23270 were completely inhibited by 1 μM and 5 μM of mercuric chloride respectively. In contrast, the activity of strain MON-1 was inhibited 33% by 5 μM, and 70% by 10 μM of mercuric chloride, suggesting that the levels of mercury resistance in A. ferrooxidans strains correspond well with the levels of mercury resistance of cytochrome c oxidase.
- 社団法人 日本農芸化学会の論文
- 2008-07-23
著者
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Sugio Tsuyoshi
Division of Bioscience, The Graduate School of Natural Science and Technology, Okayama University
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TAKEUCHI Fumiaki
Environmental Management Center, Okayama University
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Kanao Tadayoshi
Graduate School of Natural Science and Technology, Okayama University
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杉尾 剛
岡山大・農
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杉尾 剛
岡山大・院・自然科学
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Kanao Tadayoshi
Division of Bioscience, Graduate School of Natural Science and Technology, Okayama University
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Fujii Mitsuko
Division of Bioscience, Graduate School of Natural Science and Technology, Okayama University
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Ninomiya Yumika
Department of Biological Function, Faculty of Agriculture, Okayama University
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NEGISHI Atsunori
Technical Research Institute, Hazama Corporation
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Sugio Tsuyoshi
Division Of Biological Function And Genetic Resources Science Faculty Of Agriculture Okayama Univers
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Sugio Tsuyoshi
Department Of Agricultural Chemistry Faculty Of Agriculture Okayama University
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Sugio Tsuyoshi
Department Of Biological Function And Genetic Resources Science Okayama University
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杉尾 剛
Div. Of Bioscience Graduate School Of Natural Sci. And Technol. Okayama Univ.
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Fujii Michihiko
Kihara Inst. For Biological Res. And Graduate School Of Integrated Sci. Yokohama City Univ.
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Fujii Michihiko
Kihara Institute For Biological Research And Graduate School Of Integrated Science Yokohama City Uni
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Takeuchi F
Environmental Management And Safety Section Health And Environment Center Okayama Univ.
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Takeuchi Fumiaki
Environmental Management Center Okayama Univ.
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Kanao T
Graduate School Of Natural Science And Technology Okayama University
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Kanao Tadayoshi
Faculty Of Agriculture Okayama University
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Sugio T
Okayama Univ. Okayama Jpn
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Ninomiya Yumika
Department Of Biological Function Faculty Of Agriculture Okayama University
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Fujii Mitsuko
Division Of Bioscience Graduate School Of Natural Science And Technology Okayama University
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Negishi Atsunori
Technical Research Institute Hazama Corporation
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Sugio Tsuyoshi
Div. Of Bioscience The Graduate School Of Natural Sci. And Technol. Okayama Univ.
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Kanao Tadayoshi
Division Of Bioscience Graduate School Of Natural Science And Technology Okayama University
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TAKEUCHI Fumiaki
Environmental Management and Safety Section, Health and Environment Center, Okayama University
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