Photoheterotrophic Assimilation of Valerate and Associated Polyhydroxyalkanoate Production by Rhodospirillum rubrum
نویسندگان
چکیده
منابع مشابه
Photosynthesis in Rhodospirillum rubrum. II. Photoheterotrophic carbon dioxide fixation.
The contribution of the reductive pentose phosphate cycle to the photometabolism of carbon dioxide and to carbon metabolism in Rhodospirillum rubrum grown photoheterotrophically with l-malate as the carbon source is nil, unlike autotrophically grown R. rubrum. Glycolic acid appears to be the first stable product of CO(2) fixation in R. rubrum cultured photoheterotrophically on l-malate. The res...
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The massive production of urban and agricultural wastes has promoted a clear need for alternative processes of disposal and waste management. The potential use of municipal solid wastes (MSW) as feedstock for the production of polyhydroxyalkanoates (PHA) by a process known as syngas fermentation is considered herein as an attractive bio-economic strategy to reduce these wastes. In this work, we...
متن کاملThe photo-assimilation of acetate by Rhodospirillum rubrum.
Sedimentation and diffu8ion. Measurements of the sedimentation velocity of purified inhibitor AA, at five 8 min. intervals, showed a single symmetrical boundary. This single component in a solution containing 1 g./100 ml. had S20,w 2 3s and D20,, 9 03 x 10-7 cm.2/sec. These sedimentation and diffusion coefficients, together with an assumed partial specific volume of 0 75 ml./g., indicate that p...
متن کاملInfluence of Light Intensity on Reductive Pentose Phosphate Cycle Activity during Photoheterotrophic Growth of Rhodospirillum rubrum.
Light intensity during growth affects the proportion of carbon dioxide fixed by the reductive pentose phosphate cycle relative to that incorporated via C(4) acids in acetate phototrophs of Rhodospirillum rubrum. With cells grown at high light intensity (9000 lux) the specific activities of ribulose-1, 5-diphosphate and propionyl CoA carboxylases were increased compared with cells grown at low l...
متن کاملRole of genetic redundancy in polyhydroxyalkanoate (PHA) polymerases in PHA biosynthesis in Rhodospirillum rubrum.
This study investigated the apparent genetic redundancy in the biosynthesis of polyhydroxyalkanoates (PHAs) in the Rhodospirillum rubrum genome revealed by the occurrence of three homologous PHA polymerase genes (phaC1, phaC2, and phaC3). In vitro biochemical assays established that each gene product encodes PHA polymerase. A series of single, double, and triple phaC deletion mutants were chara...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 2020
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.00901-20