Redox mechanisms in “oxidant-dependent” hexose fermentation by Rhodopseudomonas capsulata
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Profiling of ornithine lipids in bacterial extracts of Rhodobacter sphaeroides by reversed-phase liquid chromatography with electrospray ionization and multistage mass spectrometry (RPLC-ESI-MS<sup>n</sup>)
2016, Analytica Chimica ActaCitation Excerpt :R. sphaeroides is a gram-negative, phototropic purple nonsulfur bacterium belonging to the α-3 subgroup of the Proteobacteria. This bacterium is highly versatile being able to grow under either aerobic or anaerobic respiration, fermentation, or photosynthesis conditions [13–18]. In the presence of oxygen R. sphaeroides uses aerobic respiration whereas, at low oxygen tension, the photosynthetic metabolism is initiated by the presence of light, that induces the development of the photosynthetic apparatus used to harvest photons and convert them in chemical energy [19,20].
Microbial dimethylsulfoxide and trimethylamine-N-oxide respiration
2005, Advances in Microbial PhysiologyCitation Excerpt :Phototrophic and aerobic dark growth of the purple ‘‘non-sulfur’’ bacteria such as R. capsulatus and R. sphaeroides were well-known to early researchers, but growth under anaerobic dark conditions with the addition of DMSO or TMAO was first observed in the 1970s (Madigan and Gest, 1978). It was initially reported that DMSO and TMAO reduction in R. capsulatus was not coupled to energy-conservation processes; rather, a cytoplasmic reductase coupled with NADH oxidation was proposed to serve as an electron sink for maintaining redox balance during anaerobic dark growth (Cox et al., 1980). However, it was soon realised that, similar to DMSO and TMAO reduction in other bacteria, DMSO and TMAO reduction in the phototrophic bacteria forms part of a true energy conserving respiratory process (McEwan et al., 1983), and that DMSO and TMAO reduction also occurs during phototrophic growth (McEwan et al., 1985).
The interaction between dimethylsulfoxide and nitrate reducing pathways in Rhodobacter capsulatus
1987, FEMS Microbiology LettersDissimilatory nitrate and dimethylsulphoxide reduction in Rhodopseudomonas capsulata
1985, FEMS Microbiology LettersTrimethylamine N-oxide (TMAO) reductases from Escherichia coli K-12
1985, FEMS Microbiology Letters
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Present address: Department of Microbiology, Southern Illinois University, Carbondale, Ill. 62901.