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1991 Fiscal Year Final Research Report Summary

Analysis of transport system for glutathione and glutathione conjugates as a factor of cell defense and drug metabolism.

Research Project

Project/Area Number 02671030
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Biological pharmacy
Research InstitutionHokkaido University

Principal Investigator

KONDO Takahito  Hokkaido University School of Medicine Lecturer, 医学部, 講師 (00158908)

Project Period (FY) 1990 – 1991
KeywordsErythrocyte / Membrane Transport / Glutathione / Glutathione S-Conjugate / ATPase
Research Abstract

We have purified and characterized a novel ATPase in human erytlirocyLes which is stimulated by glutathione S-conjugate. Erythrocyte plasma membranes were prepared and solubilized into Triton-X 100, and applied on an affinity chromatography of S-hexylglutathione-Sepharose 6B. An protein fraction eluted by approximately 1.5 mM S-hexylglutathione was found to show ATPase activity stimulated by S-(2, 4-dinitrophenyl)glutathione(GS-DNP). An apparte Km of the enzyme was 38 mu H for GS-DNP, and 140 mu H for ATP. This enzyme protein reconstituted into phospholipid vesicles showed both GS-DUP-stimulated mg^<2+> -ATPase and tile GS-DNP transport activity. T he enzyme activity was stimulated by other glutatlilone S-co-niugates, and not inhibited by vanadate nor EGTA, suggesting that this is different from Na^+, K^+ -ATPase or Ca^<2+> -ATPase. Immunological study using a specific antisera against this enzyme showed that this enzyme presents in membranes of platelets, leukocytes, hepatocytes, as well as erythrocytes. These results suggest that GS-DNP-stimulated ATPase functions in the active transport of glutathione S-conjugates and cell defense system against oxidative stress.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] T.Kondo: "Active Transprt of glutathiore S-conjugate in Human Erythrocytes"

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Tagami: "Effect of Insulin on the Impaired Antioxidant Actiuities in Aortic Endothelical Cells from Diaberic Rabbits"

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T. Kondo: "Active Transprt of Glutathiore S-Conjugate in Human Erythrocytes"

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Tagami: "Effect of Insulin on the lmpaired Antioxidant Actiuities in Aortic Endothelial Cells from Diabetic Rabbits" Metabolism.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-16  

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