Abstract
Unlike mitochondria, many bacteria use a large repertoire of c-type cytochromes in different branches of their electron transport system. Among the many cytochromes c present in the soil bacterium Paracoccus denitrificans, a membrane-bound cytochrome (c552) has been suggested to mediate the electron transport between the cytochrome bc1 complex and cytochrome-c oxidase [Berry, E. A. & Trumpower, B. L. (1985) J. Biol. Chem. 260, 2458-2467]. We have purified this cytochrome from cytoplasmic membranes, and cloned and sequenced its gene, cycM. Sequence analysis reveals that, while its C-terminal portion is highly similar to type-I cytochromes c, its N-terminal part contains a hydrophobic segment providing membrane attachment. In addition, we present immunological evidence for its functional role in respiration.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
