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Analysis of the dynamics of the plant core clock circuit

Research Project

Project/Area Number 23K23522
Project/Area Number (Other) 22H02255 (2022-2023)
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeMulti-year Fund (2024)
Single-year Grants (2022-2023)
Section一般
Review Section Basic Section 38030:Applied biochemistry-related
Research InstitutionNagoya University

Principal Investigator

Nakamichi Norihito  名古屋大学, 生命農学研究科, 教授 (90513440)

Project Period (FY) 2024-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2024: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2023: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2022: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Keywords植物 / 概日時計 / タンパク質 / ダイナミクス / 温度補償性 / 低分子化合物 / 光環境 / 化合物 / タンパク質の安定性 / 生物時計 / 生物活性化合物 / 環境変化 / 転写ネットワーク
Outline of Research at the Start

本研究では, 時計コアサーキットに含まれるPRR5, TOC1, PRR7を始めとした時計タンパク質の分解・細胞内局在・翻訳後修飾・タンパク質間相 互作用などのダイナミクスを丁寧に記述するとともに, そのダイナミクスを決めるしくみを解明する. その理解を基盤として, 長らく未解明の 課題として残されていた「外環境に応答しつつも安定的な周期を生み出すしくみ(位相の応答性, 周期の温度補償性)」の解明を目指す. 本年度はPRR5とTOC1のリン酸化を担う酵素の解析を行う. 酵素活性や酵素の発現量などが環境によって変化するかを解析する.

Outline of Final Research Achievements

We aimed to elucidate the dynamics of the protein level of the plant circadian clock, which is still largely unknown. To this end, we elucidated the action mechanism of a new compound that we had obtained that extends the clock period, and found that proper phosphorylation of basic transcription factors is necessary for the clock. We also discovered a small-molecule compound that reduces the accumulation of PRR7 protein. To explore the molecular basis of the property of keeping a nearly constant period regardless of external temperature (temperature compensation of the period), we performed mutant analysis and analysis of the protein encoded by the causative gene, and discovered the E3 ligase componentLKP2, which actively degrades PRR5 and TOC1 proteins at low temperatures.

Academic Significance and Societal Importance of the Research Achievements

本研究による長周期化化合物BML-259の作用機序から明らかとなった基本転写因子のリン酸化の必要性は、従来から指摘されていた転写翻訳フィードバックの時計への重要性を裏付けることとなった。またPRR7タンパク質の安定性が低分子化合物で制御できることが明らかとなり、その分解のシステムの解明が期待される。さらに温度補償性の分子基盤として、PRR5とTOC1タンパク質の低温依存的な特異的な分解、が提唱できた。これらの成果は、本研究の当初の目的であったタンパク質ダイナミクスから時計の動態を理解するものでもあり、本学術分野の理解が飛躍的に進展したと考えている。

Report

(4 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • Research Products

    (22 results)

All 2024 2023 2022

All Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 9 results,  Open Access: 7 results) Presentation (13 results) (of which Int'l Joint Research: 3 results,  Invited: 7 results)

  • [Journal Article] Cold-induced degradation of core clock proteins implements temperature compensation in the Arabidopsis circadian clock2024

    • Author(s)
      Maeda Akari E.、Matsuo Hiromi、Muranaka Tomoaki、Nakamichi Norihito
    • Journal Title

      Science Advances

      Volume: 10 Issue: 39

    • DOI

      10.1126/sciadv.adq0187

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Genome-wide identification of clock-associated genes and circadian rhythms in Fragaria × ananassa seedlings2024

    • Author(s)
      Ishibashi Misaki、Nakamichi Norihito、Hayashida Yuki、Kazumori Haruka、Otagaki Shungo、Matsumoto Shogo、Oikawa Akira、Shiratake Katsuhiro
    • Journal Title

      Plant Gene

      Volume: 40 Pages: 100470-100470

    • DOI

      10.1016/j.plgene.2024.100470

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A Small-Molecule Modulator Affecting the Clock-Associated PSEUDO-RESPONSE REGULATOR 7 Amount2023

    • Author(s)
      Uehara Takahiro N、Takao Saori、Matsuo Hiromi、Saito Ami N、Ota Eisuke、Ono Azusa、Itami Kenichiro、Kinoshita Toshinori、Yamashino Takafumi、Yamaguchi Junichiro、Nakamichi Norihito
    • Journal Title

      Plant And Cell Physiology

      Volume: 64 Issue: 11 Pages: 1397-1406

    • DOI

      10.1093/pcp/pcad107

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] AtMYB50 regulates root cell elongation by upregulating PECTIN METHYLESTERASE INHIBITOR 8 in Arabidopsis thaliana2023

    • Author(s)
      Mase Kosuke、Mizuno Honomi、Nakamichi Norihito、Suzuki Takamasa、Kojima Takaaki、Kamiya Sho、Takeuchi Taiga、Kondo Chiko、Yamashita Harumi、Sakaoka Satomi、Morikami Atsushi、Tsukagoshi Hironaka
    • Journal Title

      PLOS ONE

      Volume: 18 Issue: 12 Pages: e0285241-e0285241

    • DOI

      10.1371/journal.pone.0285241

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Complexities, similarities, and differences in circadian regulation in the green lineage2023

    • Author(s)
      Maeda Akari E.、Muranaka Tomoaki、Nakamichi Norihito、Oyama Tokitaka、Dodd Antony N.
    • Journal Title

      New Phytologist

      Volume: 241 Issue: 1 Pages: 28-31

    • DOI

      10.1111/nph.19323

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Chemical biology to dissect molecular mechanisms underlying plant circadian clocks2022

    • Author(s)
      Nakamichi Norihito、Yamaguchi Junichiro、Sato Ayato、Fujimoto Kazuhiro J.、Ota Eisuke
    • Journal Title

      New Phytologist

      Volume: 235 Issue: 4 Pages: 1336-1343

    • DOI

      10.1111/nph.18298

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Plant clock modifications for adapting flowering time to local environments2022

    • Author(s)
      Maeda Akari E、Nakamichi Norihito
    • Journal Title

      Plant Physiology

      Volume: in press Issue: 2 Pages: 952-967

    • DOI

      10.1093/plphys/kiac107

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structure?Function Study of a Novel Inhibitor of Cyclin-Dependent Kinase C in Arabidopsis2022

    • Author(s)
      Saito Ami N、Maeda Akari E、Takahara Tomoaki T、Matsuo Hiromi、Nishina Michiya、Ono Azusa、Shiratake Katsuhiro、Notaguchi Michitaka、Yanai Takeshi、Kinoshita Toshinori、Ota Eisuke、Fujimoto Kazuhiro J、Yamaguchi Junichiro、Nakamichi Norihito
    • Journal Title

      Plant and Cell Physiology

      Volume: 63 Issue: 11 Pages: 1720-1728

    • DOI

      10.1093/pcp/pcac127

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Epidermal CCA1 and PMR5 contribute to nonhost resistance in Arabidopsis2022

    • Author(s)
      1.Nami Maeda, Takaya Noguchi, Norihito Nakamichi, Takamasa Suzuki and Atsushi Ishikawa
    • Journal Title

      Biosci. Biotechnol. Biochem.

      Volume: 86 Issue: 12 Pages: 1623-1630

    • DOI

      10.1093/bbb/zbac160

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] 植物時計の温度補償性に関わる翻訳後修飾2024

    • Author(s)
      中道範人
    • Organizer
      第97回 生化学会大会
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] 植物の季節感知について: 農学的な視点から2024

    • Author(s)
      中道範人
    • Organizer
      時間学公開学術シンポジウム
    • Related Report
      2024 Annual Research Report
    • Invited
  • [Presentation] Phosphorylation of RNA polymerase II by CDKC; 2 maintains the Arabidopsis circadian clock period2024

    • Author(s)
      中道範人
    • Organizer
      植物生理学会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Quantitative changes in PRR5 and TOC1 protein are important to keep the period length at physiologically relevant temperatures2024

    • Author(s)
      前田明里, 松尾宏美, 村中智明, 中道範人
    • Organizer
      植物生理学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Quantity regulation of TOC1 and PRR5 for temperature compensation in the Arabidopsis circadian clock2023

    • Author(s)
      Akari Maeda, Hiromi Matsuo, Norihito Nakamichi
    • Organizer
      国際シロイヌナズナミーティング
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 植物の時計周期の調節に必要なタンパク質翻訳後修飾2023

    • Author(s)
      中道範人
    • Organizer
      日本時間生物学会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] The quantitative control of clock protein abundance is essential for temperature compensation in Arabidopsis thaliana2023

    • Author(s)
      Akari Maeda, Hiromi Matsuo, Norihito Nakamichi
    • Organizer
      Taiwan-Japan Plant Biology 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The temperature-dependent quantitative control of the clock proteins is associated with temperature compensation in Arabidopsis thaliana2023

    • Author(s)
      Akari Maeda, Hiromi Matsuo, Norihito Nakamichi
    • Organizer
      生物物理学会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] The molecular mechanism of temperature compensation in Arabidopsis2023

    • Author(s)
      Akari Maeda, Hiromi Matsuo, Yoshikatsu Matsubayashi, Toshinori Kinoshita, Norihito Nakamichi
    • Organizer
      第64回日本植物生理学会年会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Synthetic small molecules modulating plant circadian clock2022

    • Author(s)
      Norihito Nakamichi
    • Organizer
      Society for Research on Biological Rhythms 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] PRR5とTOC1はシロイヌナズナ概日時計の温度補償性に関わる2022

    • Author(s)
      前田明里、松尾宏美、松林嘉克、木下俊則、中道範人
    • Organizer
      第29回日本時間生物学会学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Analysis of plant clock transcription factor PRR72022

    • Author(s)
      山中佐和子、松尾宏美、中道範人
    • Organizer
      第29回日本時間生物学会学術大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 植物時計のE3リガーゼZTLの解析2022

    • Author(s)
      谷川陽奈子、松尾宏美、前田明里、中道範人
    • Organizer
      第29回日本時間生物学会学術大会
    • Related Report
      2022 Annual Research Report

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Published: 2022-04-19   Modified: 2026-01-16  

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