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シグナル伝達を調節するSCFリガーゼ

Research Project

Project/Area Number 12146204
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionHokkaido University (2004)
Kyushu University (2000-2003)

Principal Investigator

畠山 鎮次 (2001-2004)  北海道大学, 大学院・医学研究科, 教授 (70294973)

小南 欽一郎 (2000)  九州大学, 生体防御医学研究所, 助手 (80304830)

Co-Investigator(Kenkyū-buntansha) 畠山 鎮次  九州大学, 生体防御医学研究所, 助教授 (70294973)
Project Period (FY) 2000 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥33,100,000 (Direct Cost: ¥33,100,000)
Fiscal Year 2004: ¥7,900,000 (Direct Cost: ¥7,900,000)
Fiscal Year 2003: ¥8,000,000 (Direct Cost: ¥8,000,000)
Fiscal Year 2002: ¥8,300,000 (Direct Cost: ¥8,300,000)
Fiscal Year 2001: ¥8,900,000 (Direct Cost: ¥8,900,000)
Keywordsユビキチン / ユビキチンリガーゼ / SCF / U-ボックス / U-ボックスタンパク質 / 神経変性疾患 / UFD2 / VCP / NF-κB / カテニン / p27 / Skp2 / タンパク分解 / F-box / Skp1 / Cullin
Research Abstract

SCF複合体の既知の構成分子Skp1、Cul1、Rbx1、F-boxタンパク質等にTAPタグをつけ、TAPシステムによって会合因子を単離する実験系を確立し、マイクロシークエンサー及び質量分析器でそのタンパク質配列を明らかにした。そのなかには転写調節に重要であるTIP120AがSCF複合体構成成分と結合していることが判明した。またSCF^<Fbw7>の機能解析を目的に、Fbw7ノックアウトマウスを作製したところ、心臓奇形等で胎生致死となり、Fbw7が発生学上Notch系のシグナルに関与することを明らかにした。また、Fbw7がリン酸化依存性に癌遺伝子であるMycのユビキチン化及び分解の制御に関与することを報告した。
さまざまなタンパク質合成および修飾ミスにより細胞質で不溶化するタンパク質が存在するが、分子シャペロン等が異常たんぱく質の修復に関与することが報告されている。申請者はもうひとつの異常タンパク質処理メカニズムとしてユビキチン-プロテアソーム系に注目した。つまり、物性が正常にとれないタンパク質をユビキチン化し分解するユビキチンリガーゼの存在を明らかにすることを目的として研究を遂行した。申請者は実際に、タンパク質の品質管理に関する酵素として新たなユビキチンリガーゼ(U-ボックスタンパク質群)を同定し、疾患との関係を解析している。その基質タンパク質や調節タンパク質を同定するために、酵母Two-hybrid法およびTAPシステムによる結合タンパク質の存在をみいだしている。実際に、さまざまな種類のシャペロン群がU-ボックスタンパク質と物理的及び機能的に関わっていることを明らかにした。また、疾患との関係において、特に神経変性疾患(アルツハイマー病、パーキンソン病、ポリグルタミン病、筋萎縮性側索硬化症など)にU-ボックスタンパク質が異常タンパク質の分解調節に関与することを明らかにした。

Report

(5 results)
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (31 results)

All 2004 Other

All Journal Article (6 results) Publications (25 results)

  • [Journal Article] AIRE functions as an E3 ubiquitin ligase.2004

    • Author(s)
      Uchida, D.
    • Journal Title

      J.Exp.Med. 199

      Pages: 167-172

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Molecular clearance of ataxin-3 is regulated by a mammalian E4.2004

    • Author(s)
      Matsumoto, M.
    • Journal Title

      EMBO J. 23

      Pages: 659-669

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Phosphorylation-dependent degradation of c-Myc is mediated by the F-box protein Fbw7.2004

    • Author(s)
      Yada, M.
    • Journal Title

      EMBO J. 23

      Pages: 2116-2125

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Cytoplasmic ubiquitin ligase KPC regulates proteolysis of p27^<Kip1> at G1 phase.2004

    • Author(s)
      Kamura, T.
    • Journal Title

      Nature Cell Biol. 6

      Pages: 1229-1235

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Mouse Fbw7/Sel-10/Cdc4 is required for notch degradation during vascular development.2004

    • Author(s)
      Tsunematsu, R.
    • Journal Title

      J.Biol.Chem. 279

      Pages: 9417-9423

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Skp2-Mediated Degradation of p27 Regulates Progression into Mitosis.2004

    • Author(s)
      Nakayama K.
    • Journal Title

      Dev.Cell 6

      Pages: 661-672

    • Related Report
      2004 Annual Research Report
  • [Publications] Kaneko, C.: "Characterization of the mouse gene for the U-box-type ubiquitin ligase UFD2a."Biochem.Biophys.Res.Commun.. 300. 297-304 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Oshikawa, K.: "Preferential interaction of TIP120A with Cul1 that is not modified by NEDD8 and not associated with Skp1."Biochem.Biophys.Res.Commun.. 303. 1209-1216 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Nakayama, K.: "Impaired degradation of IkappaB and beta-catenin as a result of targeted disruption of the beta-TrCP1 gene."Proc.Natl.Acad.Sci.USA. 100. 8752-8757 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kamura, T.: "Degradation of p57^<Kip2> mediated by SCF^<Skp2>-dependent ubiquitylation."Proc.Natl.Acad.Sci.USA. 100. 10231-10236 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Uchida, D.: "AIRE functions as an E3 ubiquitin ligase."J.Exp.Med.. 199. 167-172 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Matsumoto, M.: "Molecular clearance of ataxin-3 is regulated by a mammalian E4."EMBO J.. In press.

    • Related Report
      2003 Annual Research Report
  • [Publications] Hatakeyama, S.et al.: "U Box proteins as a new family of ubiquitin-protein ligases"J. Biol. Chem.. 276. 33111-33120 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Murillas, R et al.: "Identification of developmentally expressed proteins that functionally interact with Nedd4 ubiquitin ligase"J. Biol. Chem.. 277. 2897-2907 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Miyamoto, A.: "Increased proliferation of B cells and autoimmune disease in protein kinase C-delta-deficient mice"Nature. 416. 865-869 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Nakamichi, I.: "Formation of Mallory body-like inclusions and cell death induced by deregulated expression of keratin 18"Mol. Biol. Cell. 13. 3441-3451 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Imai, Y.: "CHIP is associated with Parkin, a gene responsible for familial Parkinson's disease, and enhances its ubiquitin ligase activity"Mol. Cell. 10. 297-304 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Kaneko, C.: "Characterization of the mouse gene for the U-box type ubiquitin ligase UFD2a"Biochem. Biophys. Res. Commun.. 300. 297-304 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Kamizono, S. et al.: "The SOCS box of SOCS-1 accelerates ubiquitin-dependent proteolysis of TEL-JAK2"J. Biol. Chem.. 276. 12530-12538 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Ageta, H. et al.: "Regulation of the level of Vesl-1S/Homer-la proteins by ubiquitin proteasome proteolytic system"J. Biol. Chem.. 276. 15893-15897 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hatakeyama, S. et al.: "U Box proteins as a new family of ubiquitin-protein ligases"J. Biol. Chem.. 276. 33111-33120 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Xiang, Z. et al.: "Essential role of the Pro-survival bcl-2 homolog Al in mast cell survival following allergic activation"J. Exp. Med.. 194. 1561-1569 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hara, T. et al.: "Degradation of p27^<KiP1> at the G0-G1 transition mediated by a Skp2-independent ubiquitination pathway"J. Biol. Chem.. 276. 48937-48943 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Murillas, R et al.: "Identification of developmentally expressed proteins that functionally interact with Nedd4 ubiquitin ligase"J. Biol. Chem.. 277. 2897-2907 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yamano H. et al.: "The spike of S-phase cyclin Cig2 expression at the G1-S border in fission yeast requires both APC and SCF ubiquitin ligases."Mol.Cell. 6. 1377-1387 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Yamanaka A. et al.: "Cell cycle-dependent expression of mammalian E2-C regulated by the anaphase-promoting complex/cyclosome."Mol.Biol.Cell. 11. 2821-2831 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Osaka F. et al.: "Covalent modifier NEDD8 is essential for SCF ubiquitin-ligase in fission yeast."EMBO J.. 19. 3475-3484 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Tojima Y. et al.: "NAK is an IkB-activating kinase."Nature. 404. 778-782 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nakayama K. et al.: "Targeted disruption of Skp2 results in accumulation of cyclin E and p27Kip1, polyploidy and centrosome overduplication."EMBO J.. 19. 2069-2081 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ishida,N et al.: "Phosphorylation at serine 10, a major phosphorylation site of p27Kip1, increases its protein stability."J Biol.Chem.. 275. 25146-25154 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 小南欽一郎: "実験医学"羊土社. 218 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2001-04-01   Modified: 2018-03-28  

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