Inhibition of Sulfur Use by Sulfite Ion in Thiobacillus ferrooxidans(Microbiology & Fermentation Industry)
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概要
- 論文の詳細を見る
In Thiobacillus ferrooxidans AP19-3, elemental sulfur is oxidized by the cooperation of three enzymes, namely, hydrogen sulfide: ferric ion oxidoreductase (SFORase), sulfite: ferric ion oxidoreductase, and iron oxidase. Sulfite ions are one of the products when elemental sulfur is oxidized by SFORase. Under the conditions in which sulfite ions are accumulated in the cells, use of sulfur as an energy source by this strain was strongly inhibited. So the mechanism of inhibition by sulfite ions in T. ferrooxidans API9-3 was studied. The activities of SFORase and iron oxidase were completely inhibited by 0.8 mM and 1.5 mM NaHSO_3, respectively. ^<14>CO_2 uptake into washed intact cells was also completely inhibited by 1mM NaHSO_3 when ferrous ion or elemental sulfur was used as an energy source. However, the activities of ribulose-l, 5-bisphosphate carboxylase, phosphoribulokinase, and ribosephosphate isomerase measured with a cell-free extract were not inhibited by NaHSO_3 at 1 mM, indicating that sulfite ions didn't inhibit key enzymes of the Calvin cycle. Since the activity of CO_2 uptake into washed intact cells was absolutely dependent on Fe^<2+> - or S^0-oxidation, mechanism of inhibition of sulfur use by sulfite ions is proposed as follows: sulfite ions inhibit SFORase and iron oxidase, as a result T. ferrooxidans API9-3 can not obtain a carbon source for CO_2 fixation and stops cell growth on sulfur-salts medium.
- 社団法人日本農芸化学会の論文
- 1991-10-23
著者
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SUZUKI Hiroyuki
Department of Oral and Maxillofacial Surgery, Hamamatsu University School of Medicine
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Tano T
Department Of Biological Function And Genetic Resources Science Faculty Of Agriculture Okayama Unive
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Tano Tatsuo
Department Of Bioresources Chemistry Faculty Of Agriculture Okayama University
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Tano Tatsuo
Department Of Agricultural Chemistry Faculty Of Agriculture Okayama University
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Inagaki Kenji
Department of Bioresources Chemistry, Graduate School of Natural Science and Technology, Okayama Uni
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Sugio Tsuyoshi
Department of Botany and Microbiology, Division of Bioscience, Graduate School of Natural Science an
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Furutani Y
Okayama Univ. Okayama Jpn
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Inagaki Kenji
Dep. Of Bioresources Chemistry Graduate School Of Natural Sci. And Technol. Okayama Univ. 1-1-1 Tsus
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Inagaki Kenji
Department Of Biofunctional Chemistry Graduate School Of Natural Science And Technology Okayama Univ
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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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HIROSE Tohru
Department of Molecular-Targeting Cancer Prevention, Graduate School of Medical Science, Kyoto Prefe
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TANAKA HIDEHIKO
Department of Bioresources Chemistry, Faculty of Agriculture, Okayama University
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Hatta T
Okayama Univ. Sci. Okayama Jpn
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Tanaka H
Institute Of Information Security
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Tanaka Hidehiko
Department Of Bioresources Chemistry Faculty Of Agriculture Okayama University
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Tanaka Hidehiko
Institute Of Information Security
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Suzuki H
Kirin Brewery Co. Ltd. Takasaki Jpn
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Hirose Toru
Department Of Biological Function And Genetic Resources Science Faculty Of Agriculture Okayama Unive
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Hirose Tohru
Department Of Molecular-targeting Cancer Prevention Graduate School Of Medical Science Kyoto Prefect
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Suzuki Hiroyuki
Department Of Applied Physics School Of Science And Engineering Waseda University:(present Address)h
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Inagaki K
Department Of Bioresources Chemistry Graduate School Of Natural Science And Technology Okayama Unive
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Suzuki Hiroyuki
Department Of Animal Science Faculty Of Agriculture Hokkaido University
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