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ユビキチンとSUMO修飾によるDNA複製・修復タンパク質の制御機構の解明

Research Project

Project/Area Number 15032204
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionTohoku University

Principal Investigator

関 政幸  東北大学, 大学院・薬学研究科, 助教授 (70202140)

Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥8,400,000 (Direct Cost: ¥8,400,000)
Fiscal Year 2004: ¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 2003: ¥4,200,000 (Direct Cost: ¥4,200,000)
KeywordsUbc9 / SUMO / ユビキチン / DNA複製 / DNA修復 / DNA組換え / DNAポリメラーゼδ / RecQ
Research Abstract

本研究では、出芽酵母においてSUMO化されるタンパク質を網羅的に同定し、さらに複製や修復時にユビキチン化あるいはSUMO化されるタンパク質の制御機構を解明する研究提案を行った。前者の網羅的な解析は達成できなかったが、一方、後者においては下記のような大きな成果を得た。
(1)Ubc9の欠損によりDNA傷害で誘導される相同組換え修復に欠損が生じることを世界ではじめて立証した(前田DNA Repair,2004)。
(2)出芽酵母において、Smc6がSUMO化されることを見いだした。smc6温度感受性株を作製し、解析したところ上記ubc9変異株と同様にDNA傷害で誘導される相同組換え修復に欠損を示すことを証明した(小野田DNA Repair,2004)。
(3)DNAポリメラーゼδを鋳型DNAに乗せる役割をもつPCNAはSUMOおよびユビキチンに両方で修飾されることが報告されている。PCNAのユビキチン化、あるいはSUMO化のDNA複製における意義を調べたところ、通常のDNA複製時にPCNAのユビキチン化が起こり、それがtemplate-switching DNA synthesisを誘導し、それがDNA複製の完了に重要な役割を果たすことを実証した(Branzei Genes to Cells,2004)。
(4)DNAポリメラーゼδの2番目のサブユニットPol31がSUMO化されることを見いだした。またPol31に系統的にミスセンス変異を導入し、35種類の変異株を作製した。現在Pol31のSUMO化の意義を検討中である。

Report

(2 results)
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (11 results)

All 2005 2004 Other

All Journal Article (6 results) Publications (5 results)

  • [Journal Article] Functional relationships of FANCC to homologous recombination, translesion synthesis, and BLM.2005

    • Author(s)
      Hirano S, Yamamoto K, Ishiai M, Yamazoe M, Seki M, 他9名(計14名)
    • Journal Title

      EMBO J. 24

      Pages: 418-427

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Human Werner helicase interacting protein 1 (WRNIP1) functions as a novel modulator for DNA polymerase δ.2005

    • Author(s)
      Tsurimoto T, Shinozaki A, Yano M, Seki M, Enomoto T.
    • Journal Title

      Genes to Cells 10

      Pages: 13-22

    • Related Report
      2004 Annual Research Report
  • [Journal Article] The absence of a functional relationship between ATM and BLM, the components of BASC, in DT40 cells2004

    • Author(s)
      Qang, W., Seki, M., 他7名(計9名)
    • Journal Title

      Biochim.Biophys.Acta. 1688

      Pages: 137-144

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Ubc9 is required for damage-tolerance and damage-induced interchromosomal homologous recombination in S.cerevisiae2004

    • Author(s)
      Maeda, D., Seki, M., Onoda, F., Branzei, D., Kawabe, Y., Enomoto, T.
    • Journal Title

      DNA repair 3

      Pages: 335-341

    • Related Report
      2004 Annual Research Report
  • [Journal Article] SMC6 is required for MMS-induced interchromosomal and sister chromatid recombinations in Saccharomyces cerevisiae.2004

    • Author(s)
      Onoda, F., Takeda, M., Seki, M., Maeda, D., Tajima, J., Ui, A., Yagi, H., Enomoto, T.
    • Journal Title

      DNA repair 3

      Pages: 429-439

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Rad18/Rad5/Mms2-mediated polyubiquitination of PCNA is implicated in replication completion during replication stress.2004

    • Author(s)
      Branzei D, Seki M, Enomoto T.
    • Journal Title

      Genes to Cells 9

      Pages: 1031-1342

    • Related Report
      2004 Annual Research Report
  • [Publications] Odagiri, N., Seki, M., Onoda, F., Yoshimura, A., Watanabe, S., Enomoto, T.: "Budding yeast mms4 is epistatic with rad52 and the function of Mms4 can be replaced by a bacterial Holliday junction resolvase"DNA repair. 2. 347-358 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Wang, W., Seki, M., Narita, Y., Nakagawa, T., Yoshimura, A., Otsuki, M., Kawabe, Y., Tada, S., Yagi, H., Ishii, Y., Enomoto, T.: "Functional relation among RecQ family helicases, RecQL1, RecQL5, and BLM in cell growth and SCE formation."Mol Cell.Biol.. 23. 3527-3535 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Wang, W., Seki, M., Otsuki, M., Tada, S., Takao, N., Yamamoto, KI., Hayashi, M., Honma, M., Enomoto, T.: "The absence of a functional relationship between ATM and BLM, the components of BASC, in DT40 cells"Biochim.Biophys.Acta.. 1688. 137-144 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Maeda, D., Seki, M., Onoda, F., Branzei, D., Kawabe, Y., Enomoto, T.: "Ubc9 is required for damage-tolerance and damage-induced interchromosomal homologous recombination in S. cerevisiae"DNA repair. 3. 335-341 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Onoda, F., Takeda, M., Seki, M., Maeda, D., Tajima, J., Ui, A., Yagi, H., Enomoto, T.: "SMC6 is required for MMS-induced interchromosomal and sister chromatid recombinations in Saccharomyces cerevisiae."DNA repair.. (in press).

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2018-03-28  

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