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分必型タンパク質の膜透過の分子機構

Research Project

Project/Area Number 02404013
Research Category

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

Allocation TypeSingle-year Grants
Research Field 機械工作
Research InstitutionThe University of Tokyo

Principal Investigator

水島 昭二  東京大学, 応用微生物研究所, 教授 (50013313)

Co-Investigator(Kenkyū-buntansha) 内田 欣哉  東京大学, 応用微生物研究所, 助手 (60013330)
松山 伸一  東京大学, 応用微生物研究所, 助手 (50183108)
徳田 元  東京大学, 応用微生物研究所, 助教授 (40125943)
Project Period (FY) 1990 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥31,500,000 (Direct Cost: ¥31,500,000)
Fiscal Year 1992: ¥8,200,000 (Direct Cost: ¥8,200,000)
Fiscal Year 1991: ¥9,800,000 (Direct Cost: ¥9,800,000)
Fiscal Year 1990: ¥13,500,000 (Direct Cost: ¥13,500,000)
Keywordsタンパク質の分泌 / タンパク質の膜透過 / SecA / SecY / SecE / SecD / SecF / 再構成 / プロトン駆動力 / 大腸菌
Research Abstract

1.SecAタンパク質の構造と機能:NMRを用いてSecA上では前駆体タンパク質は伸びた構造をとること、疎水領域中の特定のアミノ酸側鎖がSecAの近傍にあることを明らかにした。またSecAの結晶化に成功した。
2.SecEタンパク質の機能:SecEのC末端部分のうち膜内部分が特に機能上重要であることを明らかにした。
3.SecYタンパク質の機能:SecYの全領域が活性に関与していること、SecYが膜透過にともなうプロトンの対向輸送に関与していることを示唆する結果を得た。またSecYの大量精製に成功した。
4.SecD,SecFタンパク質の機能:SecDはタンパク質の膜透過後放出に、SecFがSecDアッセンブリーに関与していることを示した。
5.再構成系の活用:再構成系を用いて分泌に関与する新膜タンパク質を発見し、SecGと名付けた。
6.シグナルペプチド各ドメインの役割:モデル分泌型タンパク質を用いてシグナルペプチドN末端の正荷電領域がSecA、膜リン脂質との相互作用で重要であることを示した。
7.膜透過される分子の構造特性:非ペプチド結合性部分を成熟体領域にもったタンクパク質でも膜透過しうることを発見した。
8.以上の成果をもとに分泌型タンパク質の膜透過の分子機構のモデルを提示した。

Report

(3 results)
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • 1990 Annual Research Report
  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] M.Kato et al.: "In vitro translocation of secretory proteins possessing no charges at the mature domain takes place efficiently in a protonmotive force-dependent manner." J.Biol.Chem.267. 413-418 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] L.Bruncage et al.: "SecY,SecE and band 1 form the membrane-embedded domain of E.coli preprotein translocase." J.Biol.Chem.267. 4166-4170 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] C.Hikita et al.: "Effects of total-hydrophobicity and length of the hydrophobic domain of a signal peptide on in vitro translocation efficiency." J.Biol.Chem.267. 4882-4888 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] fK.Nishiyama et al.: "The C-terminal region of SecE interacts with SecY and is functional in the reconstitution of protein translocation activity in Escherichia coli." J.Biol.Chem.267. 7170-7176 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] S.Matsuyama et al.: "Overproduction,purification and characterization of SecD and SecF,integral membrane componenst of the protein translocation machinery of Escherichia coli." Biochim.Biophys.Acta. 1122. 77-84 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] C.Hikita et al.: "The requirement of a positive charge at the amino terminus can be compensated for by a longer central hydrophobic stretch in the functioning of signal peptides." J.Biol.Chem.267. 12375-12379 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] H.Takamatsu et al.: "In vivo and in vitro characterization of the SecA gene product of bacillus subtilis." J.Bacteriol.174. 4308-4316 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] S.Matsuyama et al.: "Large-scale production of membrane proteins fused to atruncated SecA in Escherichia coli." Biosce. Biotech.Biochem.56. 1512-1514 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] S.Matsuyama et al.: "SecDis involved in the release of translocated secretory proteins from the cytoplasmic membrane of Escherichia coli." EMBO J.12. 265-270 (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Kenーichi Nishiyama: "SecY is an indispensable copmpnent of the protein secretory machinery of Escherichia coli." Biochim.Biophys.Acts. 1065. 89-97 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Jiro Akimaru: "Reconstitution of a protein secretory machinery from purified secY,SecE and SecA of Escherichia coli." Proc.Natl.Acad.Sci.USA. 88. 6545-6549 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Katsuko Tani: "A chemically crossーlinked nonlinear proOmoA molecule can be translocted into everted membrane vesicles of Escherichia coli in the presence of the proton motive forec." FEBS Letters. 285. 127-131 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Shoji Mizushima: "In vitro biochemical studies on translocation of presecretory proteins across the cytoplasmic membrane of Escherichia coli." Methods in Cell Biol.34. 107-146 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Masashi Kato: "In vitro translocation of secretory proteins possessing no charges at the mature domain takes place efficiently in a protonmotive forceーdependent manner." J.Biol.Chem.267. 413-418 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Chinami Hikita: "Effects of totalーhydrophobicity and length of the hydrophobic domain of a signal peptide on in vitro translocation efficiency." J.Biol.Chem.(1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Kenーichi Nishiyama: "The Cーterminal region region of SecE interacts with SecY and is functional in the reconstitution of protein activity in Escherichia coli." J.Biol.Chem.(1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Chinami Hikita: "The requirement of a positive charge at the aminoーterminus can be compensated for by a longer central hydrophobic stretch in the functioning of signal peptides." J.Biol.Chem.(1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] Sasaki,S.,Matsuyama,S.and Mizushima,S.: "In vitro kinetic analysis of the role of the positive charge at the aminoーterminal region of signal peptides in translocation of secretory protein across the cytoplasmic membrane in Escherichia coli." J.Biol.Chem.265. 4358-4363 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Matsuyama,S.,Kimura,E.and Mizushima,S.: "Complementation of two overlapping fragments of SecA,a protein translocation ATPase of Escherichia coli,allows ATP binding to its aminoーterminal region." J.Biol Chem.265. 8760-8765 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Akita,M.,Sasaki,S.,Matsuyama,S.and Mizushima,S.: "SecA interacts with secretory proteins by recognizing the positive charge at the aminoーterminus of the signal peptide in Escherichia coli." J.Biol Chem.265. 8164-8169 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Tokuda,H.,Kim,Y.J.and Mizushima,S.: "In vitro protein translocation into inverted membrane vesicles prepared from Vibrio alginolyticus is stimulated by the electrochemical potential of Na^+ in the presence of Escherichia coli SecA." FEBS Letters. 264. 10-12 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Mizushima,S.and Tokuda,H.: "In vitro translocation of bacterial secretory proteins and energy requirements." J.Bioenerg.Biomemb.22. 389-399 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Matsuyama,S.,Akimaru,J.and Mizushima,S.: "SecEーdependent overproduction of SecY in Escherichia coli:Evidence for interaction between two components of the secretory machinery." FEBS Letters. 269. 96-100 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Shiozuka,K.,Tani,K.,Mizushima,S.and Tokuda,H.: "The proton motive force lowers the level of ATP required for the in vitro translocation of a secretory protein in Escherichia coli." J.Biol.Chem.265. 18843-18847 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Tani,K.,Tokuda,H.and Mizushima,S.: "Translocation of proOmpA possessing an intramolecular disulfide bridge into membrane vesicles of Escherichia coli:Effect of membrane energization." J.Biol.Chem.265. 17341-17347 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Tokuda,H.,Shiozuka,K.and Mizushima S.: "Reconstitution of translocation activity for secretory proteins from solubilized components of Escherichia coli." Eur.J.Biochem.192. 583-589 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Shinkai,A.,Akita,M.,Matsuyama,S.and Mizushima,S.: "Quantitative renaturation from a guanidineーdenatured state of the SecA dimer,a 200 kDa protein involved in protein secretion in Escherichia coli." Biochem.Biophys.Res.Commun.172. 1217-1223 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yamane,K.,Akiyama,Y.,Ito,K.and Mizushima,S.: "A positively charged region is a determinant of the orientation of cytoplasmic membrane proteins in Escherichia coli." J.Biol.Chem.265. 21166-21171 (1990)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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