Cytochrome oxidase of an acidophilic iron-oxidizing bacterium, Thiobacillus ferrooxidans, functions at pH 3.5 |
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| Authors: | M Kai T Yano Y Fukumori T Yamanaka |
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| Institution: | Department of Life Science, Faculty of Science, Tokyo Institute of Technology, Japan. |
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| Abstract: | Cytochrome oxidase of Thiobacillus ferrooxidans was partially purified. The oxidase preparation had haems a and c, and oxidized ferrocytochrome c-552 of the bacterium. The optimal pH of the reaction was 3.5. The enzyme also oxidized the reduced form of rusticyanin, a copper protein of the bacterium. Our results indicate that the reduction of molecular oxygen by this enzyme may occur in the periplasm. |
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