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Structural basis for molecular architecture linking chromatin and spindle microtubule

Research Project

Project/Area Number 18K06084
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43020:Structural biochemistry-related
Research InstitutionOsaka University

Principal Investigator

Ariyoshi Mariko  大阪大学, 生命機能研究科, 特任助教(常勤) (80437243)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords染色体分配 / セントロメア / キネトコア / CENP-A / クライオ電顕 / タンパク質複合体 / X線結晶解析 / リン酸化修飾 / 分子間相互作用 / X線結晶構造解析 / クロマチン
Outline of Final Research Achievements

Centromere is a genome region for equal chromosome segregation. The primary function of centromere is providing a platform for assembly of the super-protein complex, kinetochore during mitotic progression. CENP-C and CENP-T are kinetochore components linking between centromere and microtubules. In this research, the structure of the molecular interaction surface mediated by CNEP-C or CENP-T, which is a key to kinetochore formation, was determined at atomic resolution using cryo-EM single particle analysis and X-ray crystallography. Our structural data have revealed the novel switching mechanism of the molecular interaction mode of CENP-C or CENP-T via cell cycle dependent phosphorylation. Our structural data provide new insights into the dynamic regulation of kinetochore formation tightly coupled with cell cycle.

Academic Significance and Societal Importance of the Research Achievements

細胞分裂時の染色体分配は遺伝情報の維持・継承を担う細胞機能である。染色体分配異常は、ゲノムの不安定化や細胞周期停止を引き起こし、細胞のがん化等、生物の生命活動に致命的な影響を与える。本研究では、主に構造生物学の手法を用いて、染色体分配を担う複雑なタンパク質複合体であるキネトコアの重要な分子会合面の原子レベルでの構造知見を得た。可塑的なキネトコア形成とその機能的な意義を理解するために、細胞周期と連動したリン酸化修飾がどのようにしてキネトコアタンパク質の会合を制御しているのか、その実体を原子レベルで明らかにした。得られた研究成果から、新規のキネトコア形成制御機構のモデルを提唱した。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (12 results)

All 2021 2020 2019 2018 Other

All Journal Article (6 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 6 results,  Open Access: 5 results) Presentation (4 results) Remarks (2 results)

  • [Journal Article] CENP-C Phosphorylation by CDK1 in vitro.2021

    • Author(s)
      Watanabe R, Hara M, Ariyoshi M, Fukagawa T.
    • Journal Title

      Bio Protoc.

      Volume: 11 Issue: 1

    • DOI

      10.21769/bioprotoc.3879

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cryo‐EM structure of the CENP‐A nucleosome in complex with phosphorylated CENP‐C2021

    • Author(s)
      Ariyoshi Mariko、Makino Fumiaki、Watanabe Reito、Nakagawa Reiko、Kato Takayuki、Namba Keiichi、Arimura Yasuhiro、Fujita Risa、Kurumizaka Hitoshi、Okumura Ei‐ichi、Hara Masatoshi、Fukagawa Tatsuo
    • Journal Title

      The EMBO Journal

      Volume: 40 Issue: 5 Pages: 1-20

    • DOI

      10.15252/embj.2020105671

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Conserved Histone H3-H4 Interface Regulates DNA Damage Tolerance and Homologous Recombination during the Recovery from Replication Stress2021

    • Author(s)
      Hayashi Masafumi、Keyamura Kenji、Yoshida Asami、Ariyoshi Mariko、Akanuma Genki、Hishida Takashi
    • Journal Title

      Molecular and Cellular Biology

      Volume: 41 Issue: 4

    • DOI

      10.1128/mcb.00044-20

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Essentiality of CENP-A Depends on Its Binding Mode to HJURP.2020

    • Author(s)
      Tetsuya Hori , JingHui Cao , Kohei Nishimura , Mariko Ariyoshi , Yasuhiro Arimura , Hitoshi Kurumizaka , Tatsuo Fukagawa
    • Journal Title

      Cell reports

      Volume: 33 Issue: 7 Pages: 108388-108388

    • DOI

      10.1016/j.celrep.2020.108388

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] CDK1-mediated CENP-C phosphorylation modulates CENP-A binding and mitotic2019

    • Author(s)
      Watanabe R, Hara M, Okumura EI, Herv S, Fachinetti D, Ariyoshi M, Fukagawa T
    • Journal Title

      J Cell Biol.

      Volume: 218 Issue: 12 Pages: 4042-4062

    • DOI

      10.1083/jcb.201907006

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Multiple phosphorylations control recruitment of the KMN network onto kinetochores.2018

    • Author(s)
      Hara M, Ariyoshi M, Okumura EI, Hori T, Fukagawa T.
    • Journal Title

      Nat Cell Biol

      Volume: 20 Issue: 12 Pages: 1378-1388

    • DOI

      10.1038/s41556-018-0230-0

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] CENP-AヌクレオソームーCENP-C タンパク質複合体の立体構造からみえてきた染色体分配を支えるキネトコア複合体の動的制御2020

    • Author(s)
      有吉眞理子
    • Organizer
      第93回 日本生化学会大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] キネトコアタンパク質CENP-CとCENP-NのCENP-A ヌクレオソームへの 結合モードスイッチングの構造基盤2020

    • Author(s)
      有吉眞理子, 牧野文信, 渡邉励人, 原昌稔, 深川竜郎
    • Organizer
      第43回 日本分子生物学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] セントロメアタンパク質CENP-CのC-末端領域の構造機能解析2019

    • Author(s)
      有吉眞理子、佐野智基、原昌稔、深川竜郎
    • Organizer
      第42回 日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Molecular dissection of CENP-A recognition by CENP-C2018

    • Author(s)
      M. Ariyoshi
    • Organizer
      第41回 日本分子生物学会年会
    • Related Report
      2018 Research-status Report
  • [Remarks] 染色体分配の「担い手」を原子レベルで構造決定

    • URL

      https://www.fbs.osaka-u.ac.jp/ja/research_results/papers/detail/1014

    • Related Report
      2020 Annual Research Report
  • [Remarks] 定説を覆す! 染色体の分配のしくみに、鍵となる新たな分子の働きを発見

    • URL

      http://www.fbs.osaka-u.ac.jp/jpn/events/achievement/fukagawa-20181113/

    • Related Report
      2018 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

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