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Crystallographic study of calcium ion pump of sarcoplasmic reticulum

Research Project

Project/Area Number 09480171
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Biophysics
Research InstitutionThe University of Tokyo

Principal Investigator

TOYOSHIMA Chikashi  The University of Tokyo, Institute of Molecular and Cellular Biosciences, Professor, 分子細胞生物学研究所, 教授 (70172210)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥13,800,000 (Direct Cost: ¥13,800,000)
Fiscal Year 1998: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1997: ¥11,500,000 (Direct Cost: ¥11,500,000)
Keywordsion pump / sarcoplasmic reticulum / active transport / three-dimensional structure / electron crystallography / structural analysis / membrane proteins / X-ray crystallography
Research Abstract

Crystallographic study of the calcium ion pump (Ca^<2+>-ATPase) of sarcoplasmic reticulum(SR)has been performed to elucidate the structural basis of active transport. Two types of crystal of CA^<2+>-ATPase were known when we started this project : one was tubular crystal of native SR membrane formed in the presence of EGTA and vanadate ; the other was small three-dimensional crystals consisting of reconstituted membrane sheets formed in the presence of high concentration of calcium. Both were small and suitable for electron crystallography. Using tubular crystals, three-dimensional structures were obtained for three states at 8 A resolution : no ATP, with chromium-ATP and with thapsigargin (the last one was in collaboration with Stokes Lab at NY University). The one with bound thapsigargin was best resolved and clearly showed 10 transmembrane helices expected from secondary structure predictions (published in Nature). The one with chromium ATP indicated the position of ATP-binding site(published in Biophys. J.). We have developed an extensive set of programs for this purpose. Comparison of the projection along the b-axis of the small 3D crystals and 3D structure from tubular crystals revealed large scale conformational changes attributable to the binding of calcium (Biophys. J.).
By improving the crystallisation conditions, we succeeded in preparing well ordered plate-like crystals of this ion pump. The thinnest ones could be analysed by electron and the thickest ones by X-ray crystallography. We have developed a rotation camera for collecting electron diffraction intensities and learned that even the thinnest crystals have virtually the same lattice constants with the thickest ones. We therefore proceeded to collect phase information directly from the electron micrographs and obtained a very useful set of phases for certain reflections. We are now looking for good isomorphous heavy metal derivatives for solving the structure at an atomic resolution.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (31 results)

All Other

All Publications (31 results)

  • [Publications] P.Zhang: "Structure of the calcium pump from sarcoplasmic reticulum at 8Å resolution" Nature. 392. 835-839 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Ogawa: "Structure of the Ca^<2+> pump of sarcoplasmic reticulum : A view along the lipid bilayer at 9-A resolution" Biophys.J.75. 41-52 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Mayanagi: "Three-dimensional electron microscopy of the photosystem II core complex." J.Struct.Biol.123. 211-224 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 米倉功治: "P型イオンポンプの立体構造" 細胞工学. 17. 1270-1271 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Yonekura: "The ATP binding site of Ca^<2+> -ATP ase revealed by electron image analysis" Biophys.J.72. 997-1005 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] C.Toyoshima: "Cryo-electron microscopy of ion channels and pumps" Progress in Cell Research. 6. 63-73 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 米倉功治: "膜タンパク質チューブ状結晶の三次元構造解析-らせん対称性の利用" 細胞工学. 16. 1839-1847 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 米倉功治: "筋小胞体カルシウムATPaseの構造と機能" 生物物理. 209. 310-314 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 京極好正: "構造生物学とその解析法" 共立出版株式会社, 192 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] N.Hamasaki: "″MEMBRANE PROTEINS : structure, function and expression control." Kyushu University Press and S.Karger AG, 413 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] P.Zhang: "Structure of the calcium pump from sarcoplasmic reticulum at 8 A resolution" Nature. 392. 835-839 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] H.Ogawa: "Structure of the Ca^<2+> pump of sarcoplasmic reticulum : A view along the lipid bilayer at 9- Aresolution" Biophys.J.75. 41-52 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Mayanagi: "Three-dimendional electron microscopy of the photosystem II core complex." J.Struct.Biol.123. 211-224 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Yonekura: "Three-dimensional structure of P-type ion pump (in Japanese)" Cell Technology. 17. 1270-1271 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Yonekura: "The ATP binding site of Ca^<2+>-ATPase revealed by electron image analysis" Biophys.J.72. 997-1005 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] C.Toyoshima: "Cryo-electron microscopy of ion channels and pumps" Progress in Cell Research. 6. 63-73 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Yonekura: "Three-dimensional structural analysis of tubular crystals of membrane proteins-use of helical symmetry (in Japanese)" Cell Technilogy. 16. 1839-1847 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Yonekura: "Structure and function of Ca^<2+>-ATPase of sarcoplasmic reticulum (in Japanese)" Biophysics. 209. 310-314 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] C.Toyoshima: "Electron microscopy-methodology and applications (in Japanese)" Structural Biology and its Methodlogies. 68-83 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] C.Toyoshima: "Three-dimensional cryo-electron microscopy of calcium ion pump" MEMBRANEPROTEINS : structure, function and expression control. 247-255 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] P.Zhang: "Structure of the calcium pump from sarcoplasmic reticulum at 8Å resolution" Nature. 392. 835-839 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] H.Ogawa: "Structure of the Ca^<2+> pump of sarcoplasmic reticulum:A view along the lipid bilayer at 9-Å resolution" Biophys.J.75. 41-52 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Mayanagi: "Three-dimensional electron microscopy of the photosystem II core complex." J.Struct.Biol.123. 211-224 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 米倉功治: "P型イオンポンプの立体構造" 細胞工学. 17. 1270-1271 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] P.Zhang: "Structure of the calcium pump from sarcoplasmic reticulum at 8Å resolution" Nature. In press. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Yonekura: "The ATP binding site of Ca^<2+> -ATPase revealed by electron image analysis" Biophys.J.72. 997-1005 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] C.Toyoshima: "Cryo-electron microscopy of ion channels and pumps" Progress in Cell Research. 6. 63-73 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 米倉 功治: "膜タンパク質チューブ状結晶の三次元構造解析-らせん対称性の利用" 細胞工学. 16. 1839-1847 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 米倉 功治: "筋小胞体カルシウムATPaseの構造と機能" 生物物理. 37. 310-314 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 京極 好正: "構造生物学とその解析法" 共立出版株式会社, 192 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] N.Hamasaki: "MEMBRANE PROTEINS:structure,function and expression control" Kyushu University Press and S.Karger AG, 413 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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