Possible Occurrence of a Succinate-glycine Cycle in Rhodospirillum rubrum
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منابع مشابه
The Tricarboxylic Acid Cycle in Rhodospirillum Rubrum
The oxidation of acetic acid in the dark by the non-sulfur purple bacterium, Rhodospirillum rubrum, was shown by van Niel (1, 2) to require the presence of either carbon dioxide or trace amounts of the Cb-dicarboxylic acids of the Krebs cycle. These results could readily be interpreted to mean that the oxidation of acetic acid proceeds by way of the Krebs cycle, the presence of COZ being requir...
متن کاملThe Photo-oxidation of Succinate by Chromatophores of Rhodospirillum Rubrum.
1. The stoicheiometry of the photo-oxidation of succinate by chromatophores has been investigated with [2,3-(14)C(2)]succinate. It was found that there is a stoicheiometric relationship between the amount of succinate oxidized and the NAD reduced, and that fumarate is the only product of succinate oxidation. 2. The possibility of a direct hydrogen transfer from succinate to NAD in this reaction...
متن کاملThe Photoassimilation of Succinate to Hexose by Rhodospirillum Rubrum.
1. A pathway for the synthesis of hexose from succinate by Rhodospirillum rubrum is proposed. 2. With 2,3-(14)C(2)-labelled succinate and fumarate as substrates in experiments with chromatophores and a soluble enzyme fraction of R. rubrum it was found that the products of succinate metabolism by the extracts were the same as in whole cells. It was also found that the light-dependent oxidation o...
متن کاملThe Succinate - Glycine Cycle
This aminoketonic acid is the source of all the carbon atoms of protoporphyrin (2-4). In this series of reactions, t.he a-carbon atom of glycine becomes the b-carbon atom of S-aminolevulinic acid. Since the a-carbon atom of glycine, detached from its carboxyl group, is not only utilized for porphyrin synthesis but also conforms to the metabolic pattern of the “Cl” compounds (3), this carbon acy...
متن کاملPhotosynthesis in Rhodospirillum rubrum
Ribulose 1,5-diphosphate carboxylase has been isolated from autotrophically cultured Rhoclospirillum rubrum. The molecular weight is 120,000. The K, for ribulose 1,5diphosphate is 83 mM, and for CO2 is 59 mM. The enzyme is inhibited by three important metabolites: citrate, an intermediate of the tricarboxylic acid cycle; inorganic phosphate; and 3-phosphoglyceric acid, the product of the reacti...
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ژورنال
عنوان ژورنال: The Journal of Biochemistry
سال: 1972
ISSN: 1756-2651,0021-924X
DOI: 10.1093/oxfordjournals.jbchem.a129867