Identification of cytochromes o and a3 as functional terminal oxidases in the thermophilic bacterium, PS3 |
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| Authors: | Robert K. Poole Robert I. Scott Baldev S. Baines Ian Salmon David Lloyd |
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| Affiliation: | 1. Department of Microbiology, Queen Elizabeth College (University of London), Campden Hill, London W8 7AH, England;2. Department of Microbiology, University College, Newport Road, Cardiff DF2 1TA, Wales England |
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| Abstract: | Low-temperature photodissociation spectra of membranes from the thermophile PS3 reveal cytochromes o and a3. The latter reacts with O2 at −103°C to give a light-insensitive compound(s), but the initial stages of O2 binding to cytochrome o could not be studied under these conditions. Photochemical action spectra identify cytochromes a3 and o, but not a CO-binding c-type cytochrome, as functional terminal oxidases in this bacterium. |
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| Keywords: | Cytochrome oxidases Bacterial respiration Cytochrome o Cytochrome aa3 |
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