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Identification of Na Ion Chennel Protein in Frog Rod Outer Segments.

Research Project

Project/Area Number 61580223
Research Category

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

Allocation TypeSingle-year Grants
Research Field 分子遺伝学・分子生理学
Research InstitutionFaculty of Natural Science, Naruto Univ. of Education.

Principal Investigator

SHINOZAWA Takao  Associate Professor, Faculty of Natural Sci. Naruto Univ., 自然系理科, 助教授 (30025449)

Co-Investigator(Kenkyū-buntansha) SOKABE Masahiro  Associate Professor, Faculty of Medicine, Nagoya Univ., 医学部, 助教授 (10093428)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1987: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1986: ¥900,000 (Direct Cost: ¥900,000)
KeywordsPhotoreceptor / Rod Outer Segments / Cyclic GMP Binding Protein / Na Ion Channel / 視興奮 / サイクリックGMP / イオンチャンネル / 光親和性標識
Research Abstract

For the identification of cGMP-sensitive ion channel protein in frog rod outer segments (ROS), we analyzed cGMP binding proteins in the ROS by means of photoaffinity labeling with [^3H]cGMP. we found four cGMP binding proteins (Mws 250K, 100K, 92K and 53K). Mw 250K protein was an integral-membrane protein. 250K Protein has carbohydrate moiety. The amount of 250K Protein per single rod outer segment was estimated to be 9.0 x 10_6 molecules. Light-dependent phosphorylation of 250K Protein with <gamma>-^<32>PLATP was observed. Mws 100K and 92K proteins were peripheral-membrane proteins, corresponding to cGMP phosphodiesterase. Mw 53K protein was a soluble protein. Incorporation of a membrane protein fraction of frog ROS into a planar lipid bilayer displayed the presence of, at least, three kinds of ion channel activities; two of them were related to cGMP.
Concerning the identification of cGMP-sensitive ion channel protein, Cooket al (1987) reported a protein with Mw of 63K and Matesic & Li … More ebmann (1987) reported a protein with Mw 39K. We suppose the discrepancy in these reports are related on the difference in their experimental conditions or on the presence of different species of cGMP-sensitive ion channels. In the later point, we detected other cGMP binding protein with Mw 66K in the presence of Ca^<2+> in frog rod outer segments. This 66K protein may be the same protein as Mw 63K protein reported by Cook et al. We have partially purified 250K protein (approximately 50% purity) by the solubilization with use of CHAPS and the sucrose density gradient centrifugation. We could detect the ion channel activity in this 250K protein fraction. For the elucidation of the relationships between the 250K protein and 66K(63K) protein, we etracted 250K protein from the gel of SDSPAGE. The Mw of extracted 250K protein did not changed by the boiling in the SDS solution. Therefore, 250K protein is not an oligomer of 66K(63K) protein.
The results described above support the idea that 250K protein is one of the cGMP-sensitive ion channel protein in the vertebrate photoreceptor. Less

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] Shinozawa,T.& Yoshizawa,T.: J.Biol.Chem.261. 216-223 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shinozawa,T.;Sokabe,M.;TeRada,S;Matsusaka,H.;& Yoshizawa,T.: J.Biochem.(Tokyo). 102. 281-290 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shinozawa,T.;Terada,S.;Matsusaka,H.& Yamashita,S.: FEBS Lett.219. 293-295 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Hayashi,F.;Hatano,O.& Shinozawa,T.: RADIOISOTOPES. 36. 347-350 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Fukunaga,S.;Horiguchi,H.;Iwamoto,M.;Shigenobu,Y.& Shinozawa,T.: Microbiol.Immunol.32. 115-117 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Kuo,C-H.;Tamotsu,S.;Morita,Y.;Shinozawa,T.& Miki,N.: Brain Res.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 篠沢隆雄,寺田庄一,松坂浩: "解明された桿体視細胞の謎-cGMPの生理機能とGTPaseの役割(実験医学, 特集GTP結合蛋白質)" 羊土社, 9 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] 篠沢隆雄,福永晋哉,山下伸典: "3´,5´サイクリックヌクレオチド(情報生物シリーズII, 神経情報伝達分子)" 培風館, 11 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shinozawa,T. & Yoshizawa,T.: "Cyclic Nucleotide-dependent Phosphorylation of Proteins in Rod Outer Segments." J. Biol. Chem.261. 216-223 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shinozawa,T., Sokabe,M., Terada,S., Matsusaka,H. & Yoshizawa, T.: "Detection of Cyclic GMP Binding Protein and Ion Channel Activity in Frog Rod Outer Segments." J. Biochem.(Tokyo). 102. 281-290 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shinozawa,T., Terada,S., Matsusaka,H. & Yamashita,S.: "Detection of Ca^<2+>-Dependent Cyclic GMP Binding Protein in Frog Rod Outer Segments." FEBS Lett.219. 293-295 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Hayashi,F., Hatano,O. & Shinozawa,T.: "Preparation of Highly Concentrated Super-hot <Gamma>-^<32>P ATP Using Small-Scale Ionexchange Chromatography." RADIOISOTOPES. 36. 347-350 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Fukunaga,S., Horiguchi,H., Iwamoto,M., Shigenobu,Y. & Shinozawa,T.: "Chemotaxis for Methamphetamine in Eschericia coli." Microbiol. Immunol.32. 115-117 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Yoshizawa,T., Shinozawa,T., Shichida,Y.,Matsuoka,S., Ioshida,H., Kandori,H. & Sokabe,M.: The Transduction Mechanism of Light Information in Rod Outer Segment.VNU Science Press. The Netherland., 75-84 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Shinozawa,T.;Yoshizawa,T.: J.Biol.Chem.261. 216-223 (1986)

    • Related Report
      1986 Annual Research Report
  • [Publications] 篠沢隆雄,寺田庄一,松坂浩: 実験医学. 5. 222-230 (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] 篠沢隆雄,福永晋哉,山下伸典: "「脊椎動物の視細胞外節におけるサイクリックGMPの生理機能」「情報生物シリーズ【II】神経情報の伝達に関与する分子」" 培風館, (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] Yoshizawa,T.;Shinozawa,T.;Shichida,Y.;Matuoka,S.;Ioshida,S.;Kandori,H.;Sokabe,M.: ""The Transdustion Mechanism of Light Information in Rod Outer Segment"in"Retinal Proteins"" VNU Science Press(The Netherlands), (1987)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-31   Modified: 2016-04-21  

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