The membrane-attached electron carrier cytochrome cy from Rhodobacter sphaeroides is functional in respiratory but not in photosynthetic electron transfer.

ABSTRACT: Rhodobacter species are useful model organisms for studying the structure and function of c type cytochromes (Cyt c), which are ubiquitous electron carriers with essential functions in cellular energy and signal transduction. Among these species, Rhodobacter capsulatus has a periplasmic Cyt c2Rc and a membrane-bound bipartite Cyt cyRc. These electron carriers participate in both respiratory and photosynthetic electron-transfer chains. On the other hand, until recently, Rhodobacter sphaeroides was thought to have only one of these two cytochromes, the soluble Cyt c2Rs. Recent work indicated that this species has a gene, cycYRs, that is highly homologous to cycYRc, and in the work presented here, functional properties of its gene product (Cyt cyRs) are defined. It was found that Cyt cyRs is

SUBMITTER: Myllykallio H 

PROVIDER: S-EPMC16335 | biostudies-literature | 1999 Apr

REPOSITORIES: biostudies-literature