Effect of O_2 Concentration on Dark H_2 Oxidation in Whole Cells of a Marine Sulfur Photosynthetic Bacterium (Chromatium sp. Strain Miami PBS 1071)

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概要

• 論文の詳細を見る

• Whole cells of photoanaerobically grown Chromatium sp. strain Miami PBS 1071, a marine purple sulfur bacterium, oxidized H_2 in the dark through the oxyhydrogen reaction. Oxidation of H_2 was measured by injecting either H_2 Into an air-equilibrated cell suspension (aerobic H_2 oxidation) or O_2 into an H_2/Ar-equilibrated cell suspension (microaerobic H_2 oxidation). Both types of H_2 oxidation were strongly inhibited by azide (40 mM), indicating that the oxidation proceeds via a terminal oxidase system. 2,5-Dibromo-3-methyl-6-isopropyl-p-benzoquinone (16 μM) inhibited aerobic H_2 oxidation by 49% but it accelerated microaerobic H_2 oxidation. The sensitivity of H_2 oxidation to rotenone was higher under aerobic conditions. The results indicate that H_2 oxidation proceeds via two different pathways; one contains ubiquinone and NAD, and the other does not. The contribution of each pathway depends on the O_2 partial pressure.

• 日本植物生理学会の論文

著者

• Ogawa Teruo

  Solar Energy Research Group, The Institute of Physical and Chemical Research(Riken)

• Inoue Yorinao

  Solar Energy Research Group, Institute for Physical and Chemical Research

• Ogawa Teruo

  Solar Energy Research Group The Institute Of Physical And Chemical Research (riken)

• Inoue Y

  Inst. Physical And Chemical Research Wako Jpn

• Mitsui A

  Univ. Miami Florida Usa

• Mitsui Akira

  School Of Marine And Atmospheric Science University Of Miami

• Inoue Yorinao

  Solar Energy Research Group The Institute Of Physical And Chemical Research

• Kumazawa S

  Univ. Miami Florida Usa

• Kumazawa Shuzo

  Solar Energy Research Group, The Institute of Physical and Chemical Research (RIKEN)

• Inoue Yorinao

  Solar Ener.res.group Riken

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