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Mechanisms for the structure formation and functions of subtelomeres

Research Project

Project/Area Number 20H03185
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43010:Molecular biology-related
Research InstitutionThe University of Tokyo

Principal Investigator

Kanoh Junko  東京大学, 大学院総合文化研究科, 教授 (10323809)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2022: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2021: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2020: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Keywords染色体 / テロメア / サブテロメア / クロマチン / ヒストン / バウンダリー / 遺伝子発現
Outline of Research at the Start

一般的に真核生物は、遺伝情報であるDNAを含む線状染色体をもつ。線状染色体の末端には「テロメア」と呼ばれるドメインが存在し、生命維持に重要な役割を果たしている。そして、テロメアに隣接して「サブテロメア」と呼ばれるドメインが存在する。本研究課題では、テロメアとサブテロメアの構造維持の重要性を明らかにすることを目的とする。大腸菌などは環状染色体を持つのに対して、なぜ真核生物はテロメアを含む“線状の”染色体を持つのか?サブテロメアのクロマチン構造はどのようにして形成され、その範囲はどのように決定されるのか?という疑問を明らかにする。

Outline of Final Research Achievements

At the very end of the linear chromosomes of eukaryotes lies a domain called the telomere, adjacent to which exists a domain known as the "subtelomere." The aim of this research project was to elucidate the molecular mechanisms underlying the maintenance of subtelomere structure. Through various analyses, factors involved in the formation of the condensed chromatin structure, Knob, specifically formed at the subtelomeres of fission yeast, were identified. It was found that phosphorylation of histone H2A-S121, methylation of histone H3-K36, and deacetylation of histone H4 are crucial for Knob structure formation.

Academic Significance and Societal Importance of the Research Achievements

サブテロメアには様々な遺伝子配列が含まれており、ヒトではサブテロメア遺伝子は様々な疾患と関連していることが知られている。サブテロメアで形成される凝縮クロマチン構造は、そこに存在する遺伝子の発現を抑制することから、今回の研究成果は、正常な凝縮クロマチン構造形成が遺伝子発現を正常レベルに維持するための機構を明らかにできたと言える。今後は、ヒトのサブテロメア関連の疾患の原因究明につながることが期待される。

Report

(4 results)
  • 2023 Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • Research Products

    (11 results)

All 2024 2023 2022

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (8 results) (of which Int'l Joint Research: 3 results,  Invited: 7 results)

  • [Journal Article] Bqt4 affects relative movement between SPB and nucleolus in fission yeast2024

    • Author(s)
      Wang Kaiyu、Ito Hiroaki、Kanoh Junko、Ueno Masaru
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 714 Pages: 149970-149970

    • DOI

      10.1016/j.bbrc.2024.149970

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Subtelomeres: hotspots of genome variation2023

    • Author(s)
      Kanoh Junko
    • Journal Title

      Genes & Genetic Systems

      Volume: 98 Issue: 3 Pages: 155-160

    • DOI

      10.1266/ggs.23-00049

    • ISSN
      1341-7568, 1880-5779
    • Year and Date
      2023-06-01
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Roles of Specialized Chromatin and DNA Structures at Subtelomeres in Schizosaccharomyces pombe2023

    • Author(s)
      Kanoh Junko
    • Journal Title

      Biomolecules

      Volume: 13 Issue: 5 Pages: 810-810

    • DOI

      10.3390/biom13050810

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 染色体末端近傍領域サブテロメアにおける凝縮クロマチン構造形成2023

    • Author(s)
      加納純子
    • Organizer
      第46回日本分子生物学会年会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 分裂酵母サブテロメア特異的凝縮クロマチン構造の形成メカニズム2023

    • Author(s)
      加納純子
    • Organizer
      第56回酵母遺伝学フォーラム研究報告会
    • Related Report
      2022 Annual Research Report
  • [Presentation] サブテロメアはテロメアのサブじゃない2023

    • Author(s)
      加納純子
    • Organizer
      第203回酵母細胞研究会例会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Why do eukaryotes have linear chromosome?2023

    • Author(s)
      Kanoh J.
    • Organizer
      POMBE 2023 meeting
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Evolution of telomere-adjacent regions in primates.2023

    • Author(s)
      Kanoh J.
    • Organizer
      Cold Spring Harbor Laboratory meeting, Telomeres & Telomerase
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] DNAの端が創出する生物多様性2022

    • Author(s)
      加納純子
    • Organizer
      大隅基礎科学創成財団第7回創発セミナー
    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Invited
  • [Presentation] テロメア隣接領域サブテロメアはゲノム変化のホットスポットである2022

    • Author(s)
      竹中健人、大泉祐介、加治拓人、田代三喜、加納純子
    • Organizer
      日本進化学会年大会第24回沼津大会
    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Invited
  • [Presentation] Subtelomere-specific highly condensed chromatin structure requires three different histone modifications in fission yeast2022

    • Author(s)
      加納純子
    • Organizer
      EMBO workshop, Telomere function and evolution in health and disease
    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2020-04-28   Modified: 2025-01-30  

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