Glucose-6-Phosphate Dehydrogenase in the Pentose Phosphate Pathway Is Localized in Vanadocytes of the Vanadium-Rich Ascidian, Ascidia sydneiensis samea

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概要

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• Ascidians are sessile marine animals known to accumulate high levels of vanadium selectively in vanadium-containing blood cells(vanadocytes). Almost all the vanadium accumulated in the vacuoles of vanadocytes is reduced to the +3 oxidation state via the +4 oxidation state, although vanadium is dissolved in the +5 oxidation state in sea water. Some of the reducing agents that participate in the reduction have been proposed. By chemical study, vanadium in the +5 oxidation state was reported to be reduced to the +4 oxidation state in the presence of NADPH. The present study revealed the existence of glucose-6-phosphodehydrogenase(G6PDH), the first enzyme to produce NADPH in the pentose phosphate pathway, in vanadocytes of a vanadium-rich ascidian. The results suggested that G6PDH conjugates the reduction of vanadium from the +5 through to the +4 oxidation state in vanadocytes of ascidians.

• 社団法人日本動物学会の論文

著者

• Uyama Taro

  Mukaishima Marine Biological Laboratory Faculty Of Science And Laboratory Of Marine Molecular Biolog

• Uyama T.

  Marine Biological Laboratory Graduate School Of Science Hiroshima University

• 金森 寛

  Marine Biotechnology Institute

• KANAMORI Kan

  Department of Chemistry,Faculty of Science,Toyama University

• Kanamori Kan

  Department Of Chemistry Faculty Of Science Toyama University

• Kanamori K

  Marine Biotechnology Institute

• Michibata Hitoshi

  Mukaishima Marine Biological Laboratory, Faculty of Science and Laboratory of Marine Molecular Biolo

• Yamamoto Kazuhiro

  Mukaishima Marine Biological Laboratory, Faculty of Science and Laboratory of Marine Molecular Biolo

• Yamamoto K

  Nagoya Univ. Aichi Jpn

• Michibata Hitoshi

  Mukaishima Marine Biological Laboratory Faculty Of Science And Laboratory Of Marine Molecular Biolog

• Yamamoto Kazuhiro

  Department Of Mechanical Engineering Nagoya University

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