Operation of the cbb3-type terminal oxidase in Azotobacter vinelandii |
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| Authors: | Bertsova Yu V Bogachev A V |
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| Institution: | (1) Department of Bioenergetics, Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119992, Russia |
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| Abstract: | A part of the gene encoding cbb
3-type cytochrome oxidase CcoN subunit was cloned from Azotobacter vinelandii and a mutant strain of this bacterium with disrupted ccoN gene was constructed. In contrast to the wild type strain, this one is unable to oxidize cytochromes c
4 and c
5. Thus, the A. vinelandii respiratory chain is shown to contain cbb
3-type cytochrome c oxidase. It is also shown that the activity of this enzyme is not necessary for diazotrophic growth of A. vinelandii at high oxygen concentrations. |
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| Keywords: | Azotobacter vinelandii cytochrome oxidase cbb
3-type cytochrome respiratory protection |
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