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Resolving a possible signaling mechanism involving proteolytic peptides from chloroplasts

Research Project

Project/Area Number 19K23734
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0701:Biology at molecular to cellular levels, and related fields
Research InstitutionKwansei Gakuin University

Principal Investigator

Nishimura Kenji  関西学院大学, 理工学部, 助教 (70840544)

Project Period (FY) 2019-08-30 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords葉緑体 / タンパク質分解 / ペプチド / ABCトランスポーター / レセプター
Outline of Research at the Start

植物葉緑体では不要タンパク質が分解制御を受けることは広く知られているが、その結果生じる分解産物(ペプチド)がその後辿る運命や果たす役割についてはほとんど解析されていない。本研究では、葉緑体包膜局在の2つのペプチド輸送体様トランスポーター及びそれらと協調的に発現制御される受容体型タンパク質の解析を通じて、タンパク質分解由来ペプチドがシグナルとして葉緑体外に放出され、核遺伝子の発現を制御する可能性を検証する。

Outline of Final Research Achievements

Protein degradation in particular processive proteolysis may be considered as a process of repurposing unwanted or dysfunctional proteins for generating functional molecules namely proteolytic peptides. This study investigated the fate and function of the peptides generated through proteolysis within chloroplasts. The results may suggest that peptides generated by chloroplast processive protease might be recognized by a plant immune receptor protein and that peptide release from chloroplasts could influence nuclear transcriptome.

Academic Significance and Societal Importance of the Research Achievements

オルガネラのタンパク質分解由来ペプチドの関与するシグナル伝達系自体前例は極めて少ない。線虫ミトコンドリアの例に関しても、放出されたペプチドの作用機序や情報伝達系の全貌は未だ不明である。本研究では、細菌由来の共生オルガネラから放出される分解産物ペプチドが細胞内の免疫系受容体により異物認識されうることを新たに見出した。これは15億年の細胞内共生進化を経てもなお、細菌由来オルガネラと宿主細胞の関係性が自己・非自己の認識に基づく免疫システムにより管理・統制されている可能性を想像させる。

Report

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

    (7 results)

All 2021 2020 2019 Other

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

  • [Journal Article] Deciphering the Proteotoxic Stress Responses Triggered by the Perturbed Thylakoid Proteostasis in Arabidopsis2021

    • Author(s)
      Nishimura Kenji、Nakagawa Reiko、Hachisuga Chisato、Nakajima Munekage Yuri
    • Journal Title

      Plants

      Volume: 10 Issue: 3 Pages: 519-519

    • DOI

      10.3390/plants10030519

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 葉緑体プロテアーゼによるオルガネラ恒常性と細胞内情報伝達の制御2021

    • Author(s)
      西村健司
    • Journal Title

      BSJ-Review

      Volume: 12 Issue: A Pages: 52-67

    • DOI

      10.24480/bsj-review.12a7.00200

    • ISSN
      2432-9819
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High Temperature Causes Breakdown of S Haplotype-Dependent Stigmatic Self-Incompatibility in Self-Incompatible Arabidopsis Thaliana2019

    • Author(s)
      Yamamoto M, Nishimura K, Kitashiba H, Sakamoto W, Nishio T.
    • Journal Title

      Journal of Experimental Botany

      Volume: 70 Issue: 20 Pages: 5745-5751

    • DOI

      10.1093/jxb/erz343

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 葉緑体ABCトランスポーターとトランスオルガネラホメオスタシス2020

    • Author(s)
      西村健司
    • Organizer
      日本植物学会第84回大会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 葉緑体ペプチドエクスポーターとオルガネラホメオスタシス2020

    • Author(s)
      西村健司
    • Organizer
      第61回日本植物生理学会年会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Chloroplast envelope ABC transporters and organellar homeostasis2019

    • Author(s)
      Kenji Nishimura
    • Organizer
      20th Young Researchers Seminar of Japanese Society of Photosynthesis Research
    • Related Report
      2019 Research-status Report
  • [Remarks] Kenji Nishimura - Google Scholar Citations

    • URL

      https://scholar.google.co.jp/citations?user=ZA8THGMAAAAJ

    • Related Report
      2020 Annual Research Report 2019 Research-status Report

URL: 

Published: 2019-09-03   Modified: 2022-01-27  

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