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Comprehensive and unbiased analysis of the human SMC5/6 complex: Taking advantage of auxin-inducible degron system

Research Project

Project/Area Number 19K06495
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionTokyo Metropolitan Institute of Medical Science (2021-2022)
National Institute of Genetics (2019-2020)

Principal Investigator

NATSUME Toyoaki  公益財団法人東京都医学総合研究所, ゲノム医学研究センター, 主席研究員 (10435513)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsSMC5/6 / オーキシンデグロン法 / 染色体分配 / 核内ボディ / 転写 / DNA超らせん構造 / ヘテロクロマチン / セントロメア / リボソームDNA / DNAの絡まり / 染色体 / ヒト細胞
Outline of Research at the Start

Structural Maintenance of Chromosomes (SMC) 複合体は、遺伝情報の担い手である染色体の制御において中心的な役割を果たし、その異常は癌や様々な遺伝的疾患とリンクしている。ヒトに3つ存在するSMC複合体の1つ、SMC5/6複合体は、これまでの精力的な解析にも関わらず、他の複合体と比べてその役割や分子機構に関する理解が大きく遅れている。本研究では、様々な最先端の解析手法を駆使し、網羅的で先入観のないアンバイアス解析を実施し、SMC5/6複合体の理解を深める。また、SMC5/6に関連するB型肝炎等の疾患の分子機構の解明にも繋げる。

Outline of Final Research Achievements

The SMC5/6 complex plays a pivotal role in chromosome dynamics, but its function is still elusive. This study aimed to unveil a fundamental function of the human SMC5/6 complex by taking advantage of the auxin-inducible degron technology, which enabled us to rapidly degrade a target protein in cells. As a result, I showed that the SMC5/6 complex suppresses the formation of DNA entanglements during DNA replication, thus maintaining chromosome integrity.

Academic Significance and Societal Importance of the Research Achievements

これまで謎に包まれていた染色体安定性に必須な因子SMC5/6が、染色体DNAの絡まりを抑制していることをヒト細胞を用いて明確に示した。今後、SMC5/6の異常が引き起こす染色体不安定性疾患の原因解明につながることが期待される。また、SMC5/6は自己炎症性疾患やウイルス感染防御との関連も近年示唆されているが、本研究で開発した研究ツールは、今後これらの課題に取り組む際に大変有用になると考えられる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (9 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] University of Copenhagen(デンマーク)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Pathogenic variants in SLF2 and SMC5 cause segmented chromosomes and mosaic variegated hyperploidy2022

    • Author(s)
      Grange Laura J.、... Natsume Toyoaki、... Stewart Grant S.
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 6664-6664

    • DOI

      10.1038/s41467-022-34349-8

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Topoisomerase 1 activity during mitotic transcription favors the transition from mitosis to G12021

    • Author(s)
      Wiegard Anika、Kuzin Vladislav、Cameron Donald P.、Grosser Jan、Ceribelli Michele、Mehmood Rashid、Ballarino Roberto、Valant Francesco、Grochowski Rados?aw、Karabogdan Ivana、Crosetto Nicola、Lindqvist Arne、Bizard Anna Helene、Kouzine Fedor、Natsume Toyoaki、Baranello Laura
    • Journal Title

      Molecular Cell

      Volume: 81 Issue: 24 Pages: 5007-5024.e9

    • DOI

      10.1016/j.molcel.2021.10.015

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Inducible Degradation of the Human SMC5/6 Complex Reveals an Essential Role Only during Interphase2020

    • Author(s)
      Venegas Andres Bueno、Natsume Toyoaki、Kanemaki Masato、Hickson Ian D.
    • Journal Title

      Cell Reports

      Volume: 31 Issue: 3 Pages: 107533-107533

    • DOI

      10.1016/j.celrep.2020.107533

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Generation of conditional auxin-inducible degron (AID) cells and tight control of degron-fused proteins using the degradation inhibitor auxinole2019

    • Author(s)
      Yesbolatova A, Natsume T, Hayashi K, Kanemaki MT
    • Journal Title

      Methods

      Volume: 印刷中 Pages: 73-80

    • DOI

      10.1016/j.ymeth.2019.04.010

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] ヒトSMC5/6と染色体トランスアクションにおけるDNAトポロジカルストレス:DNAの絡まりと超らせん構造2019

    • Author(s)
      夏目 豊彰
    • Organizer
      第37回染色体ワークショップ・第18回核ダイナミクス研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 第三のSMC複合体、SMC5/6の染色体トランスアクションにおける役割~DNAトポロジカルストレスの観点から2019

    • Author(s)
      夏目 豊彰
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Human SMC5/6 and DNA topological stress during chromosome transactions2019

    • Author(s)
      Toyoaki Natsume
    • Organizer
      EMBO Workshop: DNA topology and topoisomerases in genome dynamics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Elucidating a fundamental role of human SMC5/6 in chromosome transactions: from the viewpoint of DNA topological stress2019

    • Author(s)
      Toyoaki Natsume
    • Organizer
      EMBO Workshop: Organization of bacterial and eukaryotic genomes by SMC complexes
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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