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Biological function of non-canonical nucleic acids

Planned Research

Project AreaElucidation of the mechanism for dimensional response genome across species regulated by nucleic acid structures
Project/Area Number 21H05110
Research Category

Grant-in-Aid for Transformative Research Areas (B)

Allocation TypeSingle-year Grants
Review Section Transformative Research Areas, Section (II)
Research InstitutionKyoto University

Principal Investigator

Imanishi Miki  京都大学, 化学研究所, 准教授 (80362391)

Co-Investigator(Kenkyū-buntansha) 安喜 史織  奈良先端科学技術大学院大学, 先端科学技術研究科, 助教 (50747946)
Project Period (FY) 2021-08-23 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥45,500,000 (Direct Cost: ¥35,000,000、Indirect Cost: ¥10,500,000)
Fiscal Year 2023: ¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000)
Fiscal Year 2022: ¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000)
Fiscal Year 2021: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Keywords核酸高次構造 / 核酸修飾 / グアニン四重鎖 / iモチーフ / RNAメチル化 / 非標準核酸構造 / 遺伝子制御 / RNAメチル化修飾
Outline of Research at the Start

生命システムにおける多元的な環境応答体としての核酸の生理機能にアプローチする。塩基配列情報を超えて核酸が呈する多元性として、「核酸高次構造を介した化学修飾とその生理機能」「核酸高次構造を介したストレス応答機構」の解明に取り組む。バイオインフォマティクスおよび物性解析に関しては領域内で連携し、ゲノムの一次配列情報にとどまらない、核酸の多元応答が生命システムの維持に重要な役割を果たすことを明らかにしたい。

Outline of Final Research Achievements

N6-methyladenosine (m6A) is the most abundant modified base in mRNA and influences various biological phenomena. In this study, we have characterized the binding specificity and methylation properties of the RNA methyltransferase METTL3/METTL14 heterodimer to guanine quadruplex (G4) structured RNAs. We also succeeded in visualizing the G4 structure and i-motif structure in Arabidopsis cells. Furthermore, genome-wide gene expression analysis revealed that many genes are regulated by the formation of G4 structures.

Academic Significance and Societal Importance of the Research Achievements

N6-メチルアデノシン(m6A)は様々なRNA代謝に関わり、発生や分化、がん化、体内時計の制御やウイルスの生活環など種々の生命現象や疾患に影響を与える。本研究では、エピトランスクリプトーム制御におけるG4構造の関与という新たな知見と同時に、核酸高次構造の新たな機能を示す結果を得た。また、植物個体においても核酸の高次構造が存在し遺伝子制御に関わることが明らかになり、一時配列にとどまらない核酸の役割に関する基礎的な知見を得た。これらの成果は、核酸の高次機能の制御が、種々の生命現象を理解したり、創薬を行う上での新たな観点となることを示すものである。

Report

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

    (19 results)

All 2024 2023 2022 2021 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (15 results) (of which Int'l Joint Research: 4 results,  Invited: 7 results) Remarks (1 results)

  • [Journal Article] Xanthine derivatives inhibit FTO in an L-ascorbicacid-dependent manner2023

    • Author(s)
      K. Tanaka, A. Suda, M. Uesugi, S.Futaki, M. Imanishi
    • Journal Title

      Chem. Commun

      Volume: 59 Issue: 72 Pages: 10809-10812

    • DOI

      10.1039/d3cc02484a

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Mechanisms and strategies for determining m6A RNA modification sites by natural and engineered m6A effector proteins2022

    • Author(s)
      M. Imanishi
    • Journal Title

      Chem. Asian J.

      Volume: 17 Issue: 16

    • DOI

      10.1002/asia.202200367

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Recognition of G-quadruplex RNA by a crucial RNA methyltransferase component, METTL142022

    • Author(s)
      A. Yoshida, T. Oyoshi, A. Suda, S. Futaki, M. Imanishi
    • Journal Title

      Nucleic Acids Res.

      Volume: 50 Issue: 1 Pages: 449-457

    • DOI

      10.1093/nar/gkab1211

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] G-quadruplex specific binding of METTL3/14 RNA methyltransferase complex2024

    • Author(s)
      M. Imanishi, T. Endoh, Y. Ling, A. Yoshida, T. Oyoshi, S. Futaki
    • Organizer
      Supra FIBER International Summit for Nucleic Acids
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Development of a simple detection method of RNA modification and its application2024

    • Author(s)
      Miki Imanishi
    • Organizer
      日本薬学会第144年会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 配列・タイミング依存的なRNA修飾操作法の開発2024

    • Author(s)
      今西未来
    • Organizer
      日本薬学会第144年会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 核酸の高次情報を制御し理解する2024

    • Author(s)
      今西 未来
    • Organizer
      第15回タタバイオ分子クラブ
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] RNAメチル化の人為的制御2023

    • Author(s)
      今西未来,田中和無爲,音成兼光,上杉志成,二木史朗
    • Organizer
      第40回メディシナルケミストリーシンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Control of DNA replication by histone methyltransferases ATXR5 and ATXR6 in Arabidopsis thaliana2023

    • Author(s)
      M. K. Yee, A. Masada, H. Manabe, H. Takatsuka, S. S. Aki, M. Umeda
    • Organizer
      The 33rd International Conference on Arabidopsis Research
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 核酸構造の多元機能とエピトランスクリプトームとの接点を知る2023

    • Author(s)
      今西未来
    • Organizer
      第13回 CSJ化学フェスタ2023
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Detection and sequence-specific control of RNA modifications2023

    • Author(s)
      M. Imanishi
    • Organizer
      The 19th Akabori Conference (Japanese-German Symposium on Peptide Science),
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] グアニン四重鎖構造を介したRNAアデノシンメチル化2022

    • Author(s)
      今西未来, 吉田敦裕 , 大吉崇文 , 二木史朗
    • Organizer
      第16回バイオ関連化学シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] RNAメチル化酵素複合体主要構成因子METTL14のRNAグアニン四重鎖への選択的結合2022

    • Author(s)
      今西未来、吉田敦裕、大吉崇文、二木史朗
    • Organizer
      日本薬学会第142年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] オーキシンによるゲノム恒常性維持機構2022

    • Author(s)
      安喜 史織, 梅田 正明
    • Organizer
      第63回日本植物生理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Proteolysis of histone methyltransferases controls cell cycle progression in Arabidopsis2022

    • Author(s)
      Kar Yee Moo, 正田晃子, 真鍋はるか, 高塚大知, Shiori Aki, Masaaki Umeda
    • Organizer
      第63回日本植物生理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Genome maintenance strategies in plant stem cells2022

    • Author(s)
      Masaaki Umeda, Shiori Aki, Naoki Takahashi
    • Organizer
      第63回日本植物生理学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 植物ホルモンによるゲノム恒常性維持機構2021

    • Author(s)
      安喜 史織
    • Organizer
      第7回幹細胞研究会「幹細胞制御に関わるクロマチンおよびDNA高次構造体」
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Targeted RNA methylation and demethylation using artificial RNA binding proteins2021

    • Author(s)
      Miki Imanishi
    • Organizer
      Pacifichem2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Remarks] 「多元応答ゲノム」ホームページ

    • URL

      https://www.konan-u.ac.jp/hp/dir-gb_fiber/

    • Related Report
      2021 Annual Research Report

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Published: 2021-10-22   Modified: 2025-01-30  

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