Localisation of reaction centre and light harvesting complexes in the photosynthetic unit of Rhodopseudomonas viridis

Structure and transcription of the genes encoding the B1015 light-harvesting complex beta and alpha subunits and the photosynthetic reaction center L, M, and cytochrome c subunits from Rhodopseudomonas viridis

“…8). The C-terminal extensions of the LHC precursor proteins might be needed for their correct insertion in the membrane resulting in the N terminus protruding in the cytoplasm (35). Although the arrangement of the genes in the puf DNA region from the nonsulfur purple bacteria studied so far is similar in general, our sequence analysis demonstrates significant differences in the DNA regions flanking the puf operon from R. viridis.…”

Probing the structure of the core light-harvesting complex (LH1) of Rhodopseudomonas viridis by dissociation and reconstitution methodology

“…viridis membranes or photoreceptor complexes upon addition of detergent have been previously reported. Stark et al (1986) saw an 890-nm-absorbing form in Rps. viridis when they added lithium dodecyl sulfate to photoreceptor complexes.…”

“…viridis absorbs further to the red (1015 nm) compared to the absorption peaks at 870-920 nm for LH1 of BChl-a-containing bacteria, and 4) the Rps. viridis LH1 complex has not yet been successfully isolated (Stark et al 1986;Zuber and Brunisholz 1991), whereas the LH1 complexes of R. rubrum (Picorel et al 1983), Rb. sphaeroides (Broglie et al 1980), and Rb.…”

Ultrafast dynamics of excitation energy transfer and trapping in bacterial photosynthesis

“…EM micrographs of Rps. viridis [3] show that at least for this species LH1 occurs in a highly ordered structure with a six-fold symmetry. Whether this is also the case for the Bchl-acontaining species is not known, but similar arrangements have been proposed.…”