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Molecular analysis and regulation of replication fork complex, especially focus on MCM helicase

Research Project

Project/Area Number 21570156
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Functional biochemistry
Research Institution財団法人東京都医学総合研究所 (2011)
Tokyo Metropolitan Organization for Medical Research (2009-2010)

Principal Investigator

ZHIYING You  財団法人東京都医学総合研究所, ゲノム医科学研究分野, 主任研究員 (90332270)

Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords酵素の作用機作と調節 / DNA複製 / MCMヘリカーゼ / DNA結合 / 複製フォーク / ATP結合活 / プライマーゼ / Cdt1 / ATP結合活性
Research Abstract

Mini-chromosome maintenance(Mcm) is a central component for DNA unwinding reaction during eukaryotic DNA replication. DNA primase activity is required at the DNA replication fork to synthesize short RNA primers for DNA chain elongation on the lagging strand. Although direct physical and functional interactions between helicase and primase have been known in many prokaryotic and viral systems, potential interactions between helicase and primase have not been explored in eukaryotes. Using purified Mcm and polymeraseα-primase complexes, we find that the Mcm4/6/7 complex co-sediments with the polymeraseα-primase complex in the glycerol gradient centrifugation. A direct physical interaction between the Mcm2~ 7 complex and human DNA polymeraseα-primase subunits p48-p58 hetero-dimer is detected in pull-down assay. Single-stranded DNA binding activities of both primase and Mcm2~ 7 increase when they coexist. Both the Mcm4/6/7 and Mcm2~ 7 complexes stimulate primer RNA synthesis activity of primase in vitro. However, the helicase and ATP hydrolysis activities of Mcm4/6/7 are not affected by primase. These results indicate a possibility that a direct physical interaction between primase and Mcm may activate priming reaction by the former protein.

Report

(4 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (15 results)

All 2012 2011 2010 2009

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (10 results)

  • [Journal Article] Eukaryotic Chromosome DNA Replication : Where, When, and How?2010

    • Author(s)
      Hisao Masai, Seji Matsumoto, Zhiying You, Naoko Yoshizawa-Sugata, Masako Oda
    • Journal Title

      Annu. Rev. Biochem

      Volume: 79 Pages: 89-130

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Fission yeast Swi1-Swi3 complex facilitates DNA binding of Mrc12010

    • Author(s)
      Taku Tanaka, Mika Yokoyama, Seji Matsumoto, Rino Fukatsu, Zhiying You, Hisao Masai
    • Journal Title

      J Biol Chem

      Volume: 285 Pages: 39609-39622

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Eukaryotic Chromosome DNA Replication : Where, When, and How?2010

    • Author(s)
      Masai H, Matsumoto S, You Z, Yoshizawa-Sugata N, Oda M.
    • Journal Title

      Annu.Rev.Biochem.

      Volume: 79

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fission yeast Swi1-Swi3 complex facilitates DNA binding of Mrc12010

    • Author(s)
      Tanaka T, Yokoyama M, Matsumoto S, Fukatsu R, You Z, Masai H.
    • Journal Title

      J Biol Chem.

      Volume: 285 Pages: 39609-39622

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Eukaryotic Chromosome DNA Replication : Where, When, and How?2010

    • Author(s)
      Masai H, Matsumoto S, You Z, Yoshizawa-Sugata N, Oda M.
    • Journal Title

      Annu Rev Biochem. 79(Epub ahead of print)

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] Biochemical Characterization of MCM, the Essential DNA Helicase for Eukaryotic DNA Replication2012

    • Author(s)
      Zhiying You
    • Organizer
      The 3^<rd> Japan-Korea Joint Symposium on life Science
    • Place of Presentation
      Tokyo Metropolitan Institute of Medical Science. Oral presentation
    • Related Report
      2011 Final Research Report
  • [Presentation] Biochemical Characterization of MCM, the Essential DNA Helicase for Eukaryotic DNA Replication2012

    • Author(s)
      Zhiying You
    • Organizer
      The 3^<rd> Japan-Korea Joint Symposium on life Science
    • Place of Presentation
      Tokyo Metropolitan Institute of Medical Science
    • Related Report
      2011 Annual Research Report
  • [Presentation] MCM複合体によるDNAプライマーゼ活性の促進2011

    • Author(s)
      Zhiying You, Sara De Falco, Francesca M. Pisani,正井久雄
    • Organizer
      第21回DNA複製・組換え・ゲノム安定性制御ワークショップ
    • Place of Presentation
      サンピア福岡
    • Related Report
      2011 Annual Research Report 2011 Final Research Report
  • [Presentation] Characterization of MCM Loading Factor Cdt1 : similarity between Cdt1 and DnaC proteins2009

    • Author(s)
      Zhiying You and Hisao Masai
    • Organizer
      The 21st IUBMB and 12th FAOBMB International Congress of Biochemistry and Molecular Biology
    • Place of Presentation
      Shanghai, China
    • Related Report
      2011 Final Research Report 2009 Annual Research Report
  • [Presentation] Functional Characterization of Atypical ATP-binding Motif of CDT12009

    • Author(s)
      You, Z., Masai, H.
    • Organizer
      Cold Spring Harbor Laboratory Meetings
    • Place of Presentation
      New York, USA
    • Related Report
      2009 Annual Research Report
  • [Presentation] Purification and Biochemical analysis of replication factor Claspin2009

    • Author(s)
      Uno, S., You, Z., Kakusho, N., Masai, H.
    • Organizer
      第82回日本生化学会大会
    • Place of Presentation
      神戸
    • Related Report
      2009 Annual Research Report
  • [Presentation] Actions of Mcm helicase and fork stabilizing factors at replication forks2009

    • Author(s)
      Masai, H., You, Z., Tanaka, T., Yokoyama, M.
    • Organizer
      第82回日本生化学会大会
    • Place of Presentation
      神戸
    • Related Report
      2009 Annual Research Report
  • [Presentation] ATP Binding Properties of Mouse CDT1 Protein2009

    • Author(s)
      You, Z., Masai, H.
    • Organizer
      第32回日本分子生物学会年会
    • Place of Presentation
      横浜
    • Related Report
      2009 Annual Research Report
  • [Presentation] DNA binding properties of fission yeast fork stabilizing proteins : stimulation of DNA binding of Mrc1 by Swi1/3 complex2009

    • Author(s)
      Tanaka, T., Yokoyama, M., You, Z., Fukatsu, R., Masai, H.
    • Organizer
      第32回日本分子生物学会年会
    • Place of Presentation
      横浜
    • Related Report
      2009 Annual Research Report
  • [Presentation] EBNA1-dependent association of mammalian pre-RC components with oriP of Epstein-Barr Virus in vitro2009

    • Author(s)
      森山賢治, 高井裕子, 正井久雄
    • Organizer
      第32回日本分子生物学会年会
    • Place of Presentation
      横浜
    • Related Report
      2009 Annual Research Report

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Published: 2009-04-01   Modified: 2016-04-21  

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