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2014 Fiscal Year Annual Research Report

二本鎖DNA切断により誘導される複製プログラム変動のメカニズム

Research Project

Project/Area Number 14F03511
Research InstitutionTokyo Metropolitan Institute of Medical Science

Principal Investigator

正井 久雄  公益財団法人東京都医学総合研究所, ゲノム医科学研究分野, 基盤技術研究センター長 (40229349)

Co-Investigator(Kenkyū-buntansha) LAI Mong Sing  公益財団法人東京都医学総合研究所, ゲノム医科学研究分野, 外国人特別研究員
Project Period (FY) 2014-04-25 – 2016-03-31
KeywordsRif1 / yKu70 / Double-strand break / Dormant origins
Outline of Annual Research Achievements

Various types of DNA damage can induce activation of dormant replication origins. Previously, it has been demonstrated that a single irrepairable double-strand break (DSB) formation can locally trigger dormant origin firing (Doksani et al., Cell, 2009). In this study, I aim at elucidating the mechanisms leading to dormant origin firing following DSB formation.
I found that DNA damage checkpoints do not counteract DSB-induced dormant origin firing but the dormant origin firing activities are counteracted by histone acetylation state. While screening for other possible candidates that may contribute to DSB-induced dormant origin firing, I identified that telomere-related proteins, Rif1 and Ku complex, control the activation of dormant origins even in the absence of DSB. Interestingly, I found that Rif1 and yKu70 bind preferentially at regions between dormant origins and DSB site but not at regions downstream of DSB site. However, the binding profiles of Rif1 and yKu70 at those regions are not affected by DSB formation.
Although there are still no evidences that Rif1 or yKu70 directly involved in DSB-induced dormant origin firing, the binding profiles of Rif1 and yKu70 closed to the MAT locus (DSB site) may hint an important role of Rif1 or yKu70 in controlling dormant origin near DSB site. I speculated that following DSB formation, yKu70 binds to the break site and may recruit an unknown factor. The unknown factor may then act on Rif1 and prevent its inhibitory activity of dormant origin firing. Further works will be needed to prove this hypothesis.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

Research results are not as significant as originally planned.

Strategy for Future Research Activity

1. Determine whether DSB-induced dormant origin activation is a global response to DNA damage or a local phenomenon transmitted in cis to the lesion by checking whether ARS313 and ARS314 dormant origins can still fire when the DSB is induced on another chromosome.
2. Bioinformatic analysis of ChIP-seq results of Rif1 binding profile either in the presence or absence of DSB formation.
3. Repeat ChIP-seq analysis with yKu70 and compare the yKu70 binding profiles with the Rif1 binding profiles.

Remarks

研究成果の一部については 東京都医学総合研究所 ゲノム医科学研究分野 ゲノム動態プロジェクトのホームページ(http://www.igakuken.or.jp/genome/) において紹介しております。

  • Research Products

    (16 results)

All 2015 2014

All Journal Article (8 results) (of which Peer Reviewed: 8 results,  Open Access: 8 results,  Acknowledgement Compliant: 8 results) Presentation (7 results) (of which Invited: 7 results) Book (1 results)

  • [Journal Article] CDC28 phosphorylates Cac1p and regulates the association of Chromatin Assembly Factor I with chromatin.2015

    • Author(s)
      Jeffery, D., Kakusho, N., You, Z., Gharib, M., Wyse, B., Drury, E., Weinreich, M., Thibault, P. Verreault, A., Masai, H. and Yankulov, K.
    • Journal Title

      Cell Cycle

      Volume: 14 Pages: 74-85

    • DOI

      10.4161/15384101.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Definition of the transcription factor TdIF1 consensus binding sequence through genome-wide mapping of its binding sites.2015

    • Author(s)
      Kotaro Koiwai, Takashi Kubota, Nobuhisa Watanabe, Katsutoshi Hori, Osamu Koiwai and Hisao Masai
    • Journal Title

      Genes to Cells

      Volume: 20 Pages: 242-254

    • DOI

      10.1111/gtc.12216.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] NCOA4 Transcriptional Coactivator Inhibits Activation of DNA Replication Origins.2014

    • Author(s)
      Bellelli, R., Castellone, M.D., Guida, T., Limongello, R., Dathan, N.A., Merolla, F., Cirafici, A.M., Affuso, A., Masai, H., Costanzo, V., Grieco, D., Fusco, A., Santoro, M., and Carlomagno, F.
    • Journal Title

      Mol. Cell

      Volume: 55 Pages: 123-137

    • DOI

      10.1016/j.molcel.2014.04.031.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Regulation and roles of Cdc7 kinase under replication stress.2014

    • Author(s)
      Yamada, M., Masai, H., and Bartek, J.
    • Journal Title

      Cell Cycle

      Volume: 13 Pages: 1859-1866

    • DOI

      10.4161/cc.29251.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Cell cycle synchronization and flow cytometry analysis of mammalian cell.2014

    • Author(s)
      Yoshizawa-Sugata, N. and Masai, H.
    • Journal Title

      Methods in Molecular Biology

      Volume: 1170 Pages: 279-293

    • DOI

      10.1007/978-1-4939-0888-2_13.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] ATM in prevention of genomic instability.2014

    • Author(s)
      Hisao Masai
    • Journal Title

      Cell Cycle

      Volume: 13 Pages: 882-883

    • DOI

      10.4161/cc.28216.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Temporal and spatial regulation of eukaryotic DNA replication: from regulated initiation to genome-scale timing program.2014

    • Author(s)
      Renard-Guillet, C., Kanoh, Y., Shirahige, K., and Masai, H.
    • Journal Title

      Seminars in Cell & Developmental Biology,

      Volume: 30 Pages: 110-120

    • DOI

      10.1016/j.semcdb.2014.04.014.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] H2B Mono-ubiquitylation Facilitates Fork Stalling and Recovery during Replication Stress by Coordinating Rad53 Activation and Chromatin Assembly2014

    • Author(s)
      Chia-Yeh Lin, Meng-Ying Wu, Sophie Gay, Lisette Marjavaara, Mong Sing Lai, Wei-Chun Hsiao, Shih-Hsun Hung, Hsin-Yi Tseng, Duncan Edward Wright, Chen-Yi Wang, Guoo-Shyng W. Hsu, Didier Devys, Andrei Chabes, and Cheng-Fu Kao
    • Journal Title

      PLoS Genetics

      Volume: 10 Pages: 1-17

    • DOI

      10.1371/journal.pgen.1004667.

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] 生物種を超えた統一像と多様性 (Conserved mechanisms and diversity of genome DNA replication: from bacteria to human)」イントロダクション2014

    • Author(s)
      正井 久雄
    • Organizer
      第37回日本分子生物学会年会
    • Place of Presentation
      パシフィコ横浜(神奈川)
    • Year and Date
      2014-11-25 – 2014-11-27
    • Invited
  • [Presentation] Mechanisms controlling replicon dynamics following double-strand break formation2014

    • Author(s)
      Lai Mong Sing
    • Organizer
      The 9th 3R Symposium
    • Place of Presentation
      御殿場高原リゾート(静岡県)
    • Year and Date
      2014-11-17 – 2014-11-21
    • Invited
  • [Presentation] Regulation of mammalian Mcm helicase complexes2014

    • Author(s)
      Hisao Masai, You Zhiying, Koji L. Ode, Naoko Kakusho, Rino Fukatsu, and Haruhiko Takisawa
    • Organizer
      第87回日本生化学会大会シンポジウム「ゲノムを支えるDNAヘリカーゼの動態を探求する新たな研究展開」
    • Place of Presentation
      国立京都国際会館(京都)
    • Year and Date
      2014-10-15 – 2014-10-18
    • Invited
  • [Presentation] 染色体DNA複製プログラムの制御機構2014

    • Author(s)
      正井 久雄
    • Organizer
      大阪大学蛋白質研究所セミナー「染色体伝承の分子背景:複製から染色体分離まで」
    • Place of Presentation
      大阪大学(大阪)
    • Year and Date
      2014-09-25 – 2014-09-26
    • Invited
  • [Presentation] Regulation of DNA replication program in fission yeast and human cells2014

    • Author(s)
      Hisao Masai
    • Organizer
      Marco Foiani(Italy, Milan)教授の招聘により IFOM Foundation – F.I.R.C. Institute of Molecular Oncology Foundationで講演
    • Place of Presentation
      Italia, Milan
    • Year and Date
      2014-09-16 – 2014-09-16
    • Invited
  • [Presentation] Mrc1/Claspinの分子内相互作用による活性制御および新規機能2014

    • Author(s)
      正井 久雄
    • Organizer
      九州大学 大学院薬学研究院 招聘研究セミナー
    • Place of Presentation
      九州大学(福岡)
    • Year and Date
      2014-08-29 – 2014-08-29
    • Invited
  • [Presentation] Regulation of replication program in fission yeast and human cells.2014

    • Author(s)
      Hisao Masai
    • Organizer
      Peking University(特別招聘講演)
    • Place of Presentation
      Peking University(中国)
    • Year and Date
      2014-05-16 – 2014-05-16
    • Invited
  • [Book] DNA Replication, Recombination and Repair: Molecular Mechanisms and Pathology2015

    • Author(s)
      Motoshi Hayano, Seiji Matsumoto and Hisao Masai
    • Total Pages
      In press
    • Publisher
      Springer

URL: 

Published: 2016-06-01  

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