Bacterial photosynthesis genes in a virus
نویسندگان
چکیده
منابع مشابه
Regulation of bacterial photosynthesis genes by oxygen and light.
Most bacteria have the capability to adapt to changes in their environment. Facultatively phototrophic bacteria like Rhodobacter can switch from aerobic respiration to anoxygenic photosynthesis in the absence of oxygen. The formation of the photosynthetic apparatus is primarily regulated by oxygen tension. The amount of photosynthetic complexes is influenced by the light intensity in anaerobic ...
متن کاملProton pumps in bacterial photosynthesis.
We have previously suggested that the cyclic electron-transport chain in Rhodopseudomonas sphaeroides and Rhodopseudomonas capsulata is arranged as two proton pumps operating in series, one pump being associated with the photochemical reaction centre and its immediate secondary donor (cytochrome c2) and acceptor (ubiquinone), and the other with the 'dark' electron transport through which the cy...
متن کاملMimicking bacterial photosynthesis
Photosynthesis in bacteria involves absorption of light by antenna chromophores and transfer of excitation to reaction centers, which convert the excitation energy to electrochemical potential energy in the form of transmembrane charge separation. A proton pump uses this stored energy to generate proton motive force across the membrane, which in turn is used to synthesize adenosine triphosphate...
متن کاملEnergetics of bacterial photosynthesis.
We report the results of extensive numerical simulations and theoretical calculations of electronic transitions in the reaction center of Rhodobacter sphaeroides photosynthetic bacterium. The energetics and kinetics of five electronic transitions related to the kinetic scheme of primary charge separation have been analyzed and compared to experimental observations. Nonergodic formulation of the...
متن کاملPhotocycle of the flavin-binding photoreceptor AppA, a bacterial transcriptional antirepressor of photosynthesis genes.
The flavoprotein AppA from Rhodobacter sphaeroides contains an N-terminal domain belonging to a new class of photoreceptors designated BLUF domains. AppA was shown to control photosynthesis gene expression in response to blue light and oxygen tension. We have investigated the photocycle of the AppA BLUF domain by ultrafast fluorescence, femtosecond transient absorption, and nanosecond flash-pho...
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ژورنال
عنوان ژورنال: Nature
سال: 2003
ISSN: 0028-0836,1476-4687
DOI: 10.1038/424741a