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Analysis of mechanisms underlying protein degradation enabling protein localization in response to gravity.

Research Project

Project/Area Number 18K14731
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 44030:Plant molecular biology and physiology-related
Research InstitutionNational Institute for Basic Biology

Principal Investigator

Nakamura Moritaka  基礎生物学研究所, 植物環境応答研究部門, 特任研究員 (90808560)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords重力屈性 / 重力シグナリング / LAZY1ファミリー / タンパク質分解 / 細胞内局在 / シグナル伝達
Outline of Final Research Achievements

Gravity signaling is an important process that controls directional auxin transport following amyloplasts relocation in gravitropism. In Arabidopsis, LAZY1 family proteins are shown to play a key role in gravity signaling. However, it is still uncertain how LAZY1 family proteins are involved in gravity signaling possibly due to their low abundance or high turnover rate. Here, this study revealed that LZY3, a member of LAZY1 family, is ubiquitylated, suggesting that the abundance of LZY3 is regulated by the ubiquitin-proteasome pathway. In addition, high-sensitive live cell imaging technique successfully enabled the visualization of LZY3, despite its low abundance. Further imaging analysis revealed that LZY3 changes its localization toward the lower side of the cell following amyloplasts relocation in response to gravistimulation.

Academic Significance and Societal Importance of the Research Achievements

これまでの研究では、LAZY1ファミリーの分子レベルでの研究は十分にされていなかった。また、LAZY1ファミリーが重力シグナリングで機能するにも関わらず、上流のプロセスであるアミロプラスト沈降との関連性に着目した研究は全くされていなかった。本研究により、LZY3はユビキチン化されることで存在量が低く保たれていることが明らかになり、重力シグナリングにおけるLAZY1ファミリーの量的制御の重要性を示すことができた。さらには、アミロプラスト動態とLZY3の細胞内動態を時空間的に関連づけたことにより、今後、LAZY1ファミリーを中心とした重力シグナリングの分子機構の理解が進むと期待できる。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2020 2019 2018

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

  • [Journal Article] Polar recruitment of RLD by LAZY1-like protein during gravity signaling in root branch angle control2020

    • Author(s)
      Furutani Masahiko、Hirano Yoshinori、Nishimura Takeshi、Nakamura Moritaka、Taniguchi Masatoshi、Suzuki Kanako、Oshida Ryuichiro、Kondo Chiemi、Sun Song、Kato Kagayaki、Fukao Yoichiro、Hakoshima Toshio、Morita Miyo Terao
    • Journal Title

      Nature Communications

      Volume: 11 Issue: 1 Pages: 1-13

    • DOI

      10.1038/s41467-019-13729-7

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Bridging the gap between amyloplasts and directional auxin transport in plant gravitropism2019

    • Author(s)
      Nakamura M, Nishimura T, Morita MT
    • Journal Title

      Current Opinion in Plant Biology

      Volume: 52 Pages: 54-60

    • DOI

      10.1016/j.pbi.2019.07.005

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Gravity sensing and signal conversion in plant gravitropism2019

    • Author(s)
      Nakamura M, Nishimura T, Morita MT
    • Journal Title

      Journal of Experimental Botany

      Volume: 70 Issue: 14 Pages: 3495-3506

    • DOI

      10.1093/jxb/erz158

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 重力屈性における重力感受とシグナリングのメカニズム2019

    • Author(s)
      西村岳志、中村守貴、森田(寺尾)美代
    • Journal Title

      植物の生長調節

      Volume: 54 Pages: 102-107

    • NAID

      130008060492

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 重力感受細胞内で極性局在するLZY3は RLD1をリクルートする2020

    • Author(s)
      中村守貴, 古谷将彦, 近藤智恵美, 西村岳志, 谷口雅俊, 森田(寺尾)美代
    • Organizer
      第61回日本植物生理学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 重力シグナリング因子LZY3の重力感受細胞内における局在解析2019

    • Author(s)
      中村守貴
    • Organizer
      第8回植物エンドメンブレンミーティング
    • Related Report
      2019 Annual Research Report
  • [Presentation] 重力感受細胞内における重力シグナリング因子LZY3の局在解析2019

    • Author(s)
      中村守貴, 西村岳志, 近藤智恵美, 古谷将彦, 谷口雅俊, 森田(寺尾)美代
    • Organizer
      第60回日本植物生理学会年会
    • Related Report
      2018 Research-status Report
  • [Presentation] 重力シグナリング因子LZY3に着目した重力屈性制御機構の解析2018

    • Author(s)
      中村守貴
    • Organizer
      第7回植物エンドメンブレンミーティング
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2021-02-19  

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