Cyanobacterial redox carriers support photosynthesis in a purple phototrophic bacterium.

ABSTRACT: In oxygenic and anoxygenic photosynthesis, excitation energy migrates from a surrounding antenna to specialised chlorophyll (Chl) or bacteriochlorophyll (BChl) pigments housed within a reaction centre (RC) complex. Here, a charge-separated state is formed within a few picoseconds, and an electron moves along a series of cofactors until it arrives at a quinone or iron-sulphur centre acceptor. Further photochemical cycles rely on rapid re-reduction in the photo-oxidised RC, usually by small, soluble metalloproteins which vary considerably between different phototrophic clades. In the purple phototrophic bacterium Rhodobacter (Rba.) sphaeroides, the electron carrier cytochrome c2 (cyt c2) shuttles between the periplasmic faces of the cytochrome bc1 complex and the reaction centre-light harves

SUBMITTER: Bowie AGM 

PROVIDER: S-EPMC12493188 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature