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Identification and functional analysis of antibacterial proteins isolated for plant pathogen control.

Research Project

Project/Area Number 20K06059
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 39040:Plant protection science-related
Research InstitutionSojo University

Principal Investigator

Ekino Keisuke  崇城大学, 生物生命学部, 教授 (30310030)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsBacillus thuringiensis / 植物病原菌 / そうか病 / 抗菌タンパク質
Outline of Research at the Start

作物栽培において、病害虫や雑草は大変な脅威であり、その問題解決のひとつが遺伝子組み換え作物である。微生物は地球上の至るところに生育し、その種類は非常に多様である。また、現在まで微生物由来の抗菌物質が数多く実用化されている。つまり微生物は抗菌物質生産の多様な遺伝子資源として極めて有望と言える。遺伝子組換え作物創出のためのツールとして我々は、植物病原菌に有効な抗菌タンパク質を微生物より見出した。これは、数多く報告がある二次代謝産物とは異なる新規機能性タンパク質であることが予想され、新たな抗菌作用機構の発見も期待できる。また、構造遺伝子は、抗菌活性を付与した遺伝子組み換え作物の作出にも利用できる。

Outline of Final Research Achievements

Among Bacillus thuringiensis isolated for the purpose of controlling plant pathogenic fungi, strain A297 exhibits antibacterial activity against the potato scab pathogenic Streptomyces strains. As a result of purifying the antibacterial protein produced by this strain, it became clear that it produced two kinds of antibacterial proteins. These antibacterial proteins have no homology with proteins whose functions have been elucidated so far, and were found to be novel functional proteins. The mechanism of action of the antibacterial protein was analyzed by fluorescence staining using the presence or absence of membrane damage as an index. As a result of microscopic observation, it was suggested that the antibacterial protein isolated in this research project damaged the cell membrane of the potato scab pathogenic Streptomyces strains and inhibited its growth.

Academic Significance and Societal Importance of the Research Achievements

植物病原菌の微生物防除を目的に、ジャガイモそうか病の病原菌に対して抗菌活性を示す微生物を分離した。この微生物が生産する2種類の抗菌タンパク質が、ジャガイモそうか病菌の生育を阻害することが明らかとなった。また、今回発見した抗菌タンパク質はこれまで知られていない新規なタンパク質であり、その作用機構はジャガイモそうか病菌の細胞膜の損傷であることが示唆された。微生物による植物病の防除は、化学農薬の低減に寄与し、環境への負荷を減らすことができる。

Report

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

    (5 results)

All 2022 2020 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (1 results) Remarks (1 results)

  • [Journal Article] Novel breeding method, matα2-PBT, to construct isogenic series of polyploid strains of Saccharomyces cerevisiae2022

    • Author(s)
      Hirota Saeka、Nakayama Yuji、Itokazu Hodaka、Ekino Keisuke、Nishizawa Masafumi、Harashima Satoshi
    • Journal Title

      Journal of Bioscience and Bioengineering

      Volume: 133 Issue: 6 Pages: 515-523

    • DOI

      10.1016/j.jbiosc.2022.02.003

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] PCR-mediated One-day Synthesis of Guide RNA for the CRISPR/Cas9 System.2022

    • Author(s)
      Hassan N, Easmin F, Ekino K, Harashima S.
    • Journal Title

      Bio Protocol

      Volume: 11 Issue: 13

    • DOI

      10.21769/bioprotoc.4082

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Systematic approach for assessing whether undeletable chromosomal regions in Saccharomyces cerevisiae are required for cell viability.2020

    • Author(s)
      Hassan N, Easmin F, Sasano Y, Ekino K, Taguchi H, Harashima S.
    • Journal Title

      AMB Express

      Volume: 10 Issue: 1 Pages: 73-73

    • DOI

      10.1038/s41598-020-67911-9

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 黒斑病菌に抗菌活性を示すBacillus thuringiensisの機能解析2022

    • Author(s)
      松川木仁未,坂西歩,齋藤浩之,三田光章,阿部雄一,原島俊, 浴野圭輔
    • Organizer
      日本農芸化学会西日本支部大会
    • Related Report
      2022 Annual Research Report
  • [Remarks] 崇城大学生物生命学部生物生命学科生物機能科学研究室

    • URL

      https://btls.bio.sojo-u.ac.jp/microbial-lab/harashima.html

    • Related Report
      2021 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

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