Specific Features of Phosphate Transformation on Rhodobacter sphaeroides Chromatophores |
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Authors: | N. V. Goncharova O. G. Kirichenko L. V. Filatova |
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Affiliation: | (1) Bach Institute of Biochemistry, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071 Russia;(2) Department of Microbiology, Faculty of Biology, Moscow State University, Vorob'evy gory, Moscow, 119899, Russia |
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Abstract: | ATP production has been shown to take place on illumination of Rhodobacter sphaeroides chromatophores by a single light flash, i.e., in the absence of a proton gradient (which would form as a result of electron transport should a second flash occur). ATP synthesis was accompanied by H2O2 formation. Simultaneous formation of ATP and H2O2 is indicative of oxidative activation of phosphate during ATP synthesis, as in model systems with isolated chlorophyll. These data provide a theoretical background for selecting illumination parameters in laboratory and industrial photobioreactors used for cultivation of photosynthetic bacteria in biotechnological processes. |
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