FEBS Letters | |
Cytochrome o (bo) is a proton pump in Paracoccus denitrificans and Escherichia coli | |
Finel, Moshe1  Puustinen, Anne1  Virkki, Marika1  Wikström, Mårten1  | |
[1] Department of Medical Chemistry, University of Helsinki, Siltavuorenpenger 10, SF-00170 Helsinki, Finland | |
关键词: Cytochrome o complex; Cytochrome-c oxidase; Electron transfer; Energy coupling; Proton translocation; FCCP; carbonyl cyanide p-trifluoromethoxyphenylhydrazone; MX; myxothiazol; UQ-1 ubiquinonc-1; QH2; ubiquinol; | |
DOI : 10.1016/0014-5793(89)80616-7 | |
学科分类:生物化学/生物物理 | |
来源: John Wiley & Sons Ltd. | |
【 摘 要 】
Spheroplasts from aerobically grown wild-type Paracoccus denitrificans cells respire with succinate despite specific inhibition of the cytochrome bc 1 complex by myxothiazol. Coupled to this activity, which involves only b-type cytochromes, there is translocation of 1.5–1.9 H+/e− across the cytoplasmic membrane. Similar H+ translocation ratios are observed during oxidation of ubiquinol in spheroplasts from aerobically grown mutants of Paracoccus lacking cytochrome c oxidase, or deficient in cytochrome c, as well as in a strain of E. coli from which cytochrome d was deleted. These observations show that the cytochrome o complex is a proton pump much like cytochrome aa 3 to which it is structurally related.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
RO201912020292057ZK.pdf | 321KB | download |