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Algal regulatory factors involved in maintenance mechanism for cell viabirity cooperating with autophagy

Research Project

Project/Area Number 20K05832
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 38030:Applied biochemistry-related
Research InstitutionKindai University

Principal Investigator

Kajikawa Masataka  近畿大学, 生物理工学部, 准教授 (40594437)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords藻類 / 環境応答 / 栄養欠乏ストレス / タンパク質リン酸化酵素 / 細胞内シグナル伝達 / 順遺伝学 / 植物分子生物学 / 栄養欠乏 / オートファジー / 藻類生理学 / 変異体解析 / 植物生理学 / 細胞生存性 / シグナル伝達
Outline of Research at the Start

クラミドモナスは単細胞性の緑藻であり、ATG遺伝子の大半はゲノム中に1コピーのみ存在することから、シンプルなオートファジー駆動機構を持つと考えられる。本研究では、ハイスループットな変異株スクリーニングによる順遺伝学解析系が確立されたモデル緑藻クラミドモナスのatg変異株を活用し、植物界で先駆けて従来型オートファジーとは異なる新奇な細胞生存を制御する分子機構の包括的な解明を目指す。

Outline of Final Research Achievements

To elucidate novel molecular mechanisms regulating cell survival in the green alga Chlamydomonas reinhardtii, we analyzed a mutant strain of the protein kinase gene 21B1, which exhibits early viability loss under nutrient-deprived conditions. In the 21B1-complementation lines expressing the wild-type 21B1-FLAG fusion protein, the phenotype was recovered. Insertional mutation in the 21B1 gene and phenotypes were linked each other in the progeny lines between the 21B1 mutant and the wild-type strain. These results suggest that the phenotype of the 21B1 mutant is due to mutation of the 21B1 gene. The recombinant 21B1 protein exhibited phosphorylation activity against casein. Immunoprecipitation of total protein of the 21B1-FLAG-expressing complemented strain with FLAG antibody provided some signals for candidate interaction factors with the 21B1 protein.

Academic Significance and Societal Importance of the Research Achievements

藻類を用いた有用物質生産を実用化するためには、藻類自体のストレスに対する頑健性(レジリエンス)を向上させることが欠かせない。本研究において窒素、硫黄、リンといった主要栄養素の欠乏に対して適応するのに重要な制御因子であるタンパク質リン酸化酵素を同定することに成功した。有用物質生産藻類種においてこの因子の発現を強化することで、栄養欠乏条件に晒されても生存性を維持することが可能になると期待される。また、この因子の働きの強さを指標にして、レジリエンスの高い藻類種を選抜することも可能になると期待される。また、本因子の基質や相互作用因子を同定することでリン酸化による分子制御機構の包括的な解明につながる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (17 results)

All 2023 2022 2021 2020 Other

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (4 results) (of which Invited: 1 results) Remarks (8 results)

  • [Journal Article] Excretion of triacylglycerol as a matrix lipid facilitating apoplastic accumulation of a lipophilic metabolite shikonin2023

    • Author(s)
      Kanade Tatsumi; Takuji Ichino; Natsumi Isaka; Akifumi Sugiyama; Eiko Moriyoshi; Yozo Okazaki; Yasuhiro Higashi; Masataka Kajikawa; Yoshinori Tsuji; Hideya Fukuzawa et al.
    • Journal Title

      Journal of Experimental Botany

      Volume: 74 Issue: 1 Pages: 104-117

    • DOI

      10.1093/jxb/erac405

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Protein Kinase MpYAK1 Is Involved in Meristematic Cell Proliferation, Reproductive Phase Change and Nutrient Signaling in the Liverwort Marchantia polymorpha2022

    • Author(s)
      Haruka Shinkawa; Masataka Kajikawa; Tomoyuki Furuya; Ryuichi Nishihama; Hirokazu Tsukaya; Takayuki Kohchi; Hideya Fukuzawa
    • Journal Title

      Plant and Cell Physiology

      Volume: 63 Issue: 8 Pages: 1063-1077

    • DOI

      10.1093/pcp/pcac076

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] The <i>Chlamydomonas</i> bZIP transcription factor BLZ8 confers oxidative stress tolerance by inducing the carbon-concentrating mechanism2021

    • Author(s)
      Choi Bae Young、Kim Hanul、Shim Donghwan、Jang Sunghoon、Yamaoka Yasuyo、Shin Seungjun、Yamano Takashi、Kajikawa Masataka、Jin EonSeon、Fukuzawa Hideya、Lee Youngsook
    • Journal Title

      The Plant Cell

      Volume: 34 Issue: 2 Pages: 910-926

    • DOI

      10.1093/plcell/koab293

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A plant-specific DYRK kinase DYRKP coordinates cell morphology in Marchantia polymorpha.2021

    • Author(s)
      Furuya T; Shinkawa H; Kajikawa M; Nishihama R; Kohchi T; Fukuzawa H; Tsukaya H
    • Journal Title

      Journal of plant research

      Volume: 134 Issue: 6 Pages: 1265-1277

    • DOI

      10.1007/s10265-021-01345-w

    • NAID

      40022725207

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Raman image-activated cell sorting.2020

    • Author(s)
      Nitta et al.
    • Journal Title

      Nature communications

      Volume: 11 Issue: 1 Pages: 3452-3452

    • DOI

      10.1038/s41467-020-17285-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 緑藻クラミドモナスの硫黄欠乏応答におけるコイルドコイルドメイン含有タンパク質(CCDC)の機能2022

    • Author(s)
      辻敬典,岡田祐也,長房すずか,宮本明日香,新川はるか,新川友貴,山野隆志,梶川昌孝,福澤 秀哉
    • Organizer
      第63回日本植物生理学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] ツノケイソウのトリアシルグリセロール低蓄積変異株 46C1 の単離と解析2021

    • Author(s)
      大浦萌、千北乃亜、上田大貴、伊福健太郎、梶川昌孝
    • Organizer
      第21 回マリンバイオテクノロジー学会大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 栄養欠乏下での細胞生存に必要な緑藻のタンパク質リン酸化酵素変異体の解析2021

    • Author(s)
      助口瑞樹、土屋奈生、大浦一樹、櫻井優衣、梶川昌孝
    • Organizer
      日本植物学会 第85回大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 貧栄養環境での生存に必要な藻類の新奇因子の探索2020

    • Author(s)
      梶川昌孝
    • Organizer
      藻類談話会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Remarks] 近畿大学教員紹介-梶川昌孝

    • URL

      https://www.kindai.ac.jp/bost/research-and-education/teachers/introduce/kajikawa-masataka-21a.html

    • Related Report
      2023 Annual Research Report 2022 Research-status Report 2021 Research-status Report
  • [Remarks] 梶川昌孝 マイポータル-research map

    • URL

      https://researchmap.jp/masataka.kajikawa

    • Related Report
      2023 Annual Research Report 2022 Research-status Report 2021 Research-status Report 2020 Research-status Report
  • [Remarks] 生物工学科 研究室紹介「植物育種学研究室(講師・梶川 昌孝」

    • Related Report
      2022 Research-status Report
  • [Remarks] 生物工学科 研究室紹介「植物育種学研究室(講師・梶川 昌孝」

    • URL

      https://www.youtube.com/watch?v=bOd1yzpSnFE

    • Related Report
      2022 Research-status Report 2021 Research-status Report
  • [Remarks]

    • URL

      https://www.youtube.com/watch?v=_WV7Ik3-h0s

    • Related Report
      2022 Research-status Report
  • [Remarks] 生物工学科 研究室紹介「植物育種学研究室(講師・梶川 昌孝)」

    • URL

      https://www.youtube.com/watch?v=_WV7Ik3-h0s

    • Related Report
      2021 Research-status Report
  • [Remarks] 近畿大学教員紹介-梶川昌孝

    • URL

      https://www.kindai.ac.jp/bost/research-and-education/teachers/introduce/kajikawa-masataka-a51.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 近畿大学教員一覧-梶川昌孝

    • URL

      https://research.kindai.ac.jp/profile/ja.a512b8b1b12f9d87.html

    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

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