01” Studies on the Mechanism of Sulfate Formation and Phosphorylation in Extracts of Thiobadlus thioparus
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چکیده
The chemoautotropic microorganism Thiobacillus thioparus requires orthophosphate or arsenate for the complete oxidation of thiosulfate to sulfate (1). This observation has been further extended by Santer (2), who observed that during the oxidation of thiosulfate by intact cells of this organism, 0’8 is transferred from orthophosphate to the sulfate formed during the oxidation. This transfer was of such magnitude as to indicate that one-fourth of the oxygen atoms of the sulfate were derived from the orthophosphate present during the oxidation. From a consideration of these data and enzymatic observations, Peck (3) proposed a reaction sequence for the oxidation of thiosulfate that is shown by Equations 1 through 5.’
منابع مشابه
The oxidation of thiosulfate and phosphorylation in extracts of Thiobacillus thioparus.
Thiobmillus thioparus is an autotrophic microorganism that obtains the energy required for growth by the oxidation of reduced inorganic sulfur compounds to sulfate. When it is grown on high concentrations of thiosulfate, the organism accumulates elemental sulfur and produces sulfate. The pathway of thiosulfate oxidation has been essentially unknown; however, it has been postulated that tetrathi...
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Cooper, Robert C. (Michigan State University, East Lansing). Evidence for the presence of certain tricarboxylic acid cycle enzymes in Thiobacillus thioparus. J. Bacteriol. 88:624-629. 1964.-Various tricarboxylic acid cycle enzymes appear to be present in Thiobacillus thioparus. Cell-free extracts of T. thioparus were active for a number of tricarboxylic acid cycle enzymes, including aconitase, ...
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Johnson, Emmett J. (University of Mississippi Medical Center, Jackson), and Harry D. Peck, Jr. Coupling of phosphorylation and carbon dioxide fixation in extracts of Thiobacillus thioparus. J. Bacteriol. 89:1041-1050. 1965.-A cell-free system from Thiobacillus thioparus which fixes large quantities of C(14)O(2) in the presence of ribose-5-phosphate, adenosine triphosphate (ATP), and Mg(++) has ...
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