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Elucidation of the amphibious locomotion system of multicellular cyanobacteria

Research Project

Project/Area Number 18K19338
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 44:Biology at cellular to organismal levels, and related fields
Research InstitutionKyoto University

Principal Investigator

Shiraishi Hideaki  京都大学, 生命科学研究科, 准教授 (90202118)

Project Period (FY) 2018-06-29 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords細胞運動 / シアノバクテリア / 微細藻 / スピルリナ / 微生物 / 突然変異 / 原核生物
Outline of Final Research Achievements

Arthrospira platensis, popularly known as spirulina, is a multicellular, filamentous cyanobacterium. This organism is capable of cell movement and migration both on land and in water. Hundreds of cells in a row form this organism, but how these cells work together to provide smooth movement is a mystery. In this study, a system to efficiently select mutants with defective locomotion was established, and many spontaneous A. platensis mutants that were unable to move were isolated. Analysis of the mutation sites in the genomes of these mutants by the next-generation sequencer revealed a set of candidate genes possibly involved in this organism's movement.

Academic Significance and Societal Importance of the Research Achievements

A. platensis の構成細胞がどのようにして協調してスムーズな個体の運動をもたらしているのかは謎であり、その運動の元となる運動装置の実体もわかっていない。本研究で、運動能に欠損をもたらす突然変異の原因遺伝子の候補を明らかにし、それによって、運動装置の実体を解明するための大きな手がかりを得ることができた。これは、運動装置の解明を通じてナノマシンの構築や新たな生物模倣技術の創生に繋がる成果である。また、使用した生物は世界中で利用されている有用な食用藍藻で、本研究で得た変異はこの生物の遺伝学的手法の整備のための有用な遺伝マーカーとして利用でき、この生物の研究の基本ツールともなるものである。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (9 results)

All 2021 2020 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (8 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results)

  • [Journal Article] The use of a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide-based colorimetric assay in the viability analysis of the filamentous cyanobacterium Arthrospira platensis2021

    • Author(s)
      Shiraishi, H. and Toyoda, A.
    • Journal Title

      Bioscience, Biotechnology, and Biochemistry

      Volume: 85 Issue: 3 Pages: 739-742

    • DOI

      10.1093/bbb/zbaa050

    • NAID

      120007035736

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] 食品に適した藻類とその培養技術2021

    • Author(s)
      白石英秋
    • Organizer
      技術情報協会セミナー
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 藍藻 Arthrospira platensis(スピルリナ)の実験系の整備とその代表的な可視突然変異2020

    • Author(s)
      白石英秋, 木村仁美, 高井舞香
    • Organizer
      日本遺伝学会第92回大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 食用藍藻 Arthrospira(スピルリナ)の培養と遺伝的取扱い2019

    • Author(s)
      白石英秋
    • Organizer
      藍藻の分子生物学2019
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 突然変異体を用いた繊維状シアノバクテリアの細胞運動の解析2019

    • Author(s)
      白石英秋
    • Organizer
      第21回 生命科学研究科シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] 食用藍藻 Arthrospira platensis の持つ DNA 分解酵素の解析2019

    • Author(s)
      林 翔太, 白石 英秋
    • Organizer
      日本藻類学会第43回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Does Arthrospira platensis have strong non-specific deoxyribonucleases?2018

    • Author(s)
      林翔太、白石英秋
    • Organizer
      The 17th Joint Mini-Symposium on Molecular and Cell Biology among National Taiwan University, the University of Tsukuba, and Kyoto U
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Arthrospira platensis の細胞抽出液に含まれるDNA分解酵素の解析2018

    • Author(s)
      林翔太、白石英秋
    • Organizer
      京都大学植物縦横無尽の会 第14回ワークショップ
    • Related Report
      2018 Research-status Report
  • [Presentation] アフリカ産のシアノバクテリアの現在・過去・未来2018

    • Author(s)
      白石英秋
    • Organizer
      京都大学植物縦横無尽の会 第14回ワークショップ
    • Related Report
      2018 Research-status Report
    • Invited

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Published: 2018-07-25   Modified: 2022-01-27  

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