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Cryo-EM analysis using chromatin substrate film on the grid

Research Project

Project/Area Number 19K06522
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 InstitutionThe University of Tokyo

Principal Investigator

Takizawa Yoshimasa  東京大学, 定量生命科学研究所, 准教授 (00434291)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsクロマチン / ヌクレオソーム / クライオ電子顕微鏡 / 構造生物学
Outline of Research at the Start

クロマチンは、ヌクレオソームと呼ばれるヒストンとDNAの複合体を最小単位として核内に高度に収納されている。申請者は、結晶化が困難な試料溶液をグリッド上で急速凍結し観察することのできるクライオ電顕鏡解析を使い、ヘテロクロマチン基本構造やネイティブDNA配列を含むヌクレオソームの3次元構造を明らかにしてきた。本研究課題では、クライオ電子顕微鏡を用いたクロマチン構造解析における急速凍結試料作製の効率化、高品質化および今まで構造解析が難しかったクロマチン複合体や高次クロマチンの可視化を実現するため、クロマチン基盤膜グリッドを創出する。

Outline of Final Research Achievements

In eukaryotic cells, the genomic DNA is tightly packed into the nucleus by forming the chromatin. The basic repeating unit of chromatin is nucleosome, which contains ~147 base pairs of DNA and two copies of four core histones, H2A, H2B, H3, and H4.. Recently, cryo-EM analysis is an indispensable technique for structural biology. However it is still challenging to reproducibly obtain the suitable cryo-EM grid of chromatin sample for the single particle analysis. To efficiently prepare the suitable grid of chromatin sample for single-particle cryo-EM analysis, I have attempted to generate the chromatin substrate film grid, which is directly attached the chromatin on the cryo-EM grid. In this approach, I covered a single layer graphene film on the cryo-EM grid and applied the nucleosome. I successfully concentrated the nucleosome on the cryo-EM grid with a graphene film. It will be useful for further structural studies of the chromatin.

Academic Significance and Societal Importance of the Research Achievements

本研究課題は、クロマチン基盤膜グリッドを作製することにより、クライオ電子顕微鏡によるクロマチン構造解析の効率化および高品質化を図ることを目的としている。本研究を行った結果、グラフェンシートを貼ったグリッド上で、ヌクレオソームを化学固定することなく粒子の崩壊を防ぎ、クライオ電顕で観察することが可能となった。本研究により、クロマチン基盤膜グリッドの基礎ができたことにより、ヌクレオソームおよび高次クロマチンの構造解析だけでなく、エピゲノム情報を導入したクロマチンやクロマチン結合因子複合体などの構造解析の促進が期待できる。

Report

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

    (14 results)

All 2021 2020 2019

All Journal Article (7 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 7 results,  Open Access: 6 results) Presentation (6 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results) Book (1 results)

  • [Journal Article] Cryo-EM structure of the nucleosome core particle containing <i>Giardia lamblia</i> histones2021

    • Author(s)
      Sato Shoko、Takizawa Yoshimasa、Hoshikawa Fumika、Dacher Mariko、Tanaka Hiroki、Tachiwana Hiroaki、Kujirai Tomoya、Iikura Yukari、Ho Cheng-Han、Adachi Naruhiko、Patwal Indu、Flaus Andrew、Kurumizaka Hitoshi
    • Journal Title

      Nucleic Acids Research

      Volume: 49 Issue: 15 Pages: 8934-8946

    • DOI

      10.1093/nar/gkab644

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Unusual nucleosome formation and transcriptome influence by the histone H3mm18 variant2021

    • Author(s)
      Hirai Seiya、Tomimatsu Kosuke、Miyawaki-Kuwakado Atsuko、Takizawa Yoshimasa、Komatsu Tetsuro、Tachibana Taro、Fukushima Yutaro、Takeda Yasuko、Negishi Lumi、Kujirai Tomoya、Koyama Masako、Ohkawa Yasuyuki、Kurumizaka Hitoshi
    • Journal Title

      Nucleic Acids Research

      Volume: 50 Issue: 1 Pages: 72-91

    • DOI

      10.1093/nar/gkab1137

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural basis of nucleosomal histone H4 lysine 20 methylation by SET8 methyltransferase2021

    • Author(s)
      Ho Cheng-Han、Takizawa Yoshimasa、Kobayashi Wataru、Arimura Yasuhiro、Kimura Hiroshi、Kurumizaka Hitoshi
    • Journal Title

      Life Science Alliance

      Volume: 4 Issue: 4 Pages: e202000919-e202000919

    • DOI

      10.26508/lsa.202000919

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nucleosome binding by the pioneer transcription factor OCT42020

    • Author(s)
      Echigoya Kenta、Koyama Masako、Negishi Lumi、Takizawa Yoshimasa、Mizukami Yuka、Shimabayashi Hideki、Kuroda Akari、Kurumizaka Hitoshi
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 11832-11832

    • DOI

      10.1038/s41598-020-68850-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Interaction of the pioneer transcription factor GATA3 with nucleosomes2020

    • Author(s)
      Tanaka Hiroki、Takizawa Yoshimasa、Takaku Motoki、Kato Daiki、Kumagawa Yusuke、Grimm Sara A.、Wade Paul A.、Kurumizaka Hitoshi
    • Journal Title

      Nature Communications

      Volume: 11 Issue: 1 Pages: 4136-4136

    • DOI

      10.1038/s41467-020-17959-y

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Structural basis for the inhibition of cGAS by nucleosomes2020

    • Author(s)
      Kujirai Tomoya、Zierhut Christian、Takizawa Yoshimasa、Kim Ryan、Negishi Lumi、Uruma Nobuki、Hirai Seiya、Funabiki Hironori、Kurumizaka Hitoshi
    • Journal Title

      Science

      Volume: 370 Issue: 6515 Pages: 455-458

    • DOI

      10.1126/science.abd0237

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cryo-EM Structures of Centromeric Tri-nucleosomes Containing a Central CENP-A Nucleosome.2020

    • Author(s)
      Yoshimasa Takizawa, Cheng-Han Ho, Hiroaki Tachiwana, Hideyuki Matsunami, Wataru Kobayashi, Midori Suzuki, Yasuhiro Arimura, Tetsuya Hori, Tatsuo Fukagawa, Melanie D Ohi, Matthias Wolf, Hitoshi Kurumizaka
    • Journal Title

      Structure

      Volume: 28 Issue: 1 Pages: 44-53

    • DOI

      10.1016/j.str.2019.10.016

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Sub-2 &#197; resolution structure of human nucleosome obtained by cryo-EM2021

    • Author(s)
      Takizawa Y, Sato S, Ho C-H, Danev R, Kurumizaka H
    • Organizer
      EMBO EMBL Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Structural analysis of higher-order chromatin containing CENP-A nucleosome2020

    • Author(s)
      Yoshimasa Takizawa, Cheng-han Ho, Hiroaki Tachiwana, Matthias Wolf, Hitoshi Kurumizaka
    • Organizer
      第48回日本分子生物学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Chromatin structure and dynamics as the platform for DNA repair2020

    • Author(s)
      Takizawa Y, Ho C-H, Kobayashi W, Ishii H, Arimura Y, Kurumizaka H
    • Organizer
      4th DNA Repair/Replication Structures and Cancer Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] クライオ電子顕微鏡によるクロマチン構造基盤の解析2019

    • Author(s)
      滝沢由政,
    • Organizer
      CBI学会2019年大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] セントロメア特異的CENP-Aヌクレオソームを含む高次クロマチンのクライオ電子顕微鏡構造解析2019

    • Author(s)
      滝沢由政, 何承翰, 立和名博昭, Matthias Wolf, 胡桃坂仁志
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] モノメチルトランスフェラーゼSET8-ヌクレオソーム複合体のクライオ電子顕微鏡構造解析2019

    • Author(s)
      滝沢由政, 何承翰, 小林航, 石井初芽, 平野里奈, 有村泰宏, 胡桃坂仁志
    • 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
  • [Book] イメージング時代の構造生命科学2020

    • Author(s)
      鯨井智也,滝沢由政,胡桃坂仁志
    • Total Pages
      5
    • Publisher
      羊土社
    • ISBN
      9784758103855
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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