STUDIES ON THE PATHWAY OF SULFIDE PRODUCTION IN A COPPER-ADAPTED YEAST

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概要

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• Metabolism of some sulfur-containing substances was studied in a copper-resistant strain of yeast (R), its parent strain (P) and respiratory-deficient (RD) mutants from them. The results obtained are as follows: 1. Using sulfate, sulfite and thiosulfate as sulfur sources, R produced more H_2S than P, and both of these had the activity higher than their RD mutants. All of them produced a large amount of H_2S from cysteine, but only little from methionine, cysteinesulfinic acid and S-sulfocysteine. 2. From sulfite and thiosulfate, P and R produced more H_2S in aerobic than in anaerobic condition. With sulfate and cysteine, however, H_2S production did not differ under those conditions. 3. In both P and R, the sulfate-to-sulfite and sulfite-to-sulfide reactions were remarkably lowered by iron and zinc deficiencies. But the cysteine-to-sulfide reaction was not affected by the metal-deficiencies. 4. H_2S production from sulfate was remarkably depressed by high concentrations of pantothenate. 5. Rates of reaction steps on a plausible pathway from sulfate to sulfide and to organic sulfur compounds are estimated for the strains used. R is characterized by its large capacity of the reaction step from sulfate to sulfite, and excessive sulfite thus formed is liberated as sulfide not by the way of cysteine.

• 日本植物生理学会の論文

著者

• Kikuchi Tadatoshi

  Botanical Department Faculty Of Seience Kyoto University:(present)research Reactor Institute Kyoto U

関連論文

• PRODUCTION OF HYDROGEN SULFIDE FROM SULFITE BY A COPPER-ADAPTED YEAST
• STUDIES ON THE PATHWAY OF SULFIDE PRODUCTION IN A COPPER-ADAPTED YEAST

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