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Plant genome plasticity resulting from the alteration of the M phase checkpoint

Research Project

Project/Area Number 21K06215
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 44030:Plant molecular biology and physiology-related
Research InstitutionNara Institute of Science and Technology

Principal Investigator

Komaki Shinichiro  奈良先端科学技術大学院大学, 先端科学技術研究科, 助教 (50584588)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsSurvivin / CPC複合体 / M期チェックポイント / 細胞分裂 / ゲノム倍加 / 染色体分離
Outline of Research at the Start

本研究は、可塑性を持つ植物ゲノムの原因を突き止めることを目的とし、継続的ストレス条件下での植物特異的なM期チェックポイントの制御機構を明らかにすることを目指す。特に研究代表者が新規に発見した、植物におけるSurvivinの機能的ホモログと思われるBORI1およびBORI2の機能解析を進めることで、ストレス時のCPC複合体の局在制御に迫る。CPC複合体は、酵母から動物まで高度に保存された複合体であるにもかかわらず、植物ではその構成因子の1つが完全に別のタンパク質に置き換わっている可能性があり、進化的側面からも興味深い研究となっている。

Outline of Final Research Achievements

The chromosome passenger complex (CPC) is comprised of an Aurora kinase and a scaffold built of INCENP, Borealin, and Survivin. While most CPC components are conserved across eukaryotes, orthologs of the chromatin reader Survivin have only been identified in animals and fungi. This raises the question of how its essential role is carried out in other eukaryotes.
We identified BORI1 and BORI2 as redundant Survivin-like proteins in the context of the CPC in plants. The BORIs were demonstrated to bind to phosphorylated histone H3, which is crucial for the proper association of the CPC with chromatin. However, this interaction is not mediated by a BIR domain as in previously recognized Survivin orthologs, but by an FHA domain. We propose that the unifying criterion of Survivin-type proteins is a helix that facilitates complex formation with the other two scaffold components, and that the addition of a phosphate-binding domain evolved in parallel in different eukaryotic groups.

Academic Significance and Societal Importance of the Research Achievements

動物のSurvivinは、アポトーシスの制御因子として同定された。このアポトーシス経路でのSurvivinは、BIRドメインによってカスパーゼを抑制することから、SurvivinはBIRドメインを持つタンパク質であると信じられてきた。そのため、BIRドメインを持つタンパク質が存在しない生物には、Survivinのホモログも無いと考えられてきた。本研究は、これまで不明であった植物でのCPC複合体の局在機構を明らかにしただけにはとどまらず、Survivinの本体がヘリックス領域であると再定義することを可能とし、全ての真核生物にSurvivin /BORIタンパク質が保存されていることを示した。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (16 results)

All 2024 2023 2022 Other

All Int'l Joint Research (10 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (3 results) Book (1 results) Remarks (1 results)

  • [Int'l Joint Research] University of Hamburg(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] University of Groningen(オランダ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Ghent University(ベルギー)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Hungarian Academy of Sciences(ハンガリー)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] University of Hamburg(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] University of Groningen(オランダ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Ghent University(ベルギー)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] University of Hamburg(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Groningen(オランダ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Ghent University(ベルギー)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Molecular convergence by differential domain acquisition is a hallmark of chromosomal passenger complex evolution2022

    • Author(s)
      Komaki Shinichiro、Tromer Eelco C.、De Jaeger Geert、De Winne Nancy、Heese Maren、Schnittger Arp
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 119 Issue: 42

    • DOI

      10.1073/pnas.2200108119

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 植物におけるキネトコア分子構造基盤2024

    • Author(s)
      Pettko-Szandtner Aladar, Zoltan Magyar, 小牧 伸一郎
    • Organizer
      第65回日本植物生理学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 分子レベルの収斂進化による染色体パッセンジャー複合体の局在機構2023

    • Author(s)
      小牧伸一郎, Eelco C Tromer, Geert De Jaeger, Nancy De Winne, Maren Heese, 橋本隆, Arp Schnittger
    • Organizer
      第64回日本植物生理学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] 染色体パッセンジャー複合体の一員である SURVIVIN は収斂進化によって生じた2022

    • Author(s)
      小牧伸一郎, Eelco C Tromer, Geert De Jaeger, Nancy De Winne, Maren Heese, 橋本隆, Arp Schnittger
    • Organizer
      第63回日本植物生理学会年会
    • Related Report
      2021 Research-status Report
  • [Book] アグリバイオ 2023年11月臨時増刊号2023

    • Author(s)
      小牧 伸一郎
    • Total Pages
      5
    • Publisher
      北隆館
    • Related Report
      2023 Annual Research Report
  • [Remarks] ストレス下でも植物の正常な細胞分裂を進めるCPC複合体の局在機構を解明染色体の特定部位に局在して機能

    • URL

      https://bsw3.naist.jp/research/index.php?id=2591

    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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