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Comprehensive structure-activity relationship analysis with substrates for the development of inhibitors of multidrug efflux complexes.

Research Project

Project/Area Number 21K19337
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 47:Pharmaceutical sciences and related fields
Research InstitutionOsaka University

Principal Investigator

Yamashita Eiki  大阪大学, 蛋白質研究所, 准教授 (00294132)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2023: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2022: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords構造生物 / 相互作用解析 / 薬剤排出タンパク質複合体 / 薬剤排出タンパク質
Outline of Research at the Start

現在、世界中では年間約70万人が薬剤耐性菌感染症で亡くなっており、薬剤耐性菌問題を克服することは世界的な重要課題の1つである。本研究では、グラム陰性菌の薬剤耐性化の発現に関わっているRND型多剤排出タンパク質複合体の機能を阻害する分子の戦略的な開発に必要な情報を蓄積するために、複合体と様々な基質との相互作用解析及び様々な基質との結合型の構造解析を行う。

Outline of Final Research Achievements

The multidrug resistance of Gram-negative bacteria is closely related to the RND-type multidrug efflux complexes, which recognize and efflux a variety of antimicrobial agents from the bacteria. In this study, to accumulate structure-activity relationship information for the development of inhibitors targeting RND-type multidrug efflux complexes, we conducted interaction analysis and X-ray crystallographic analysis to examine the detailed interaction between the transporter MexB of the RND-type multidrug efflux complex MexAB-OprM expressed in Pseudomonas aeruginosa and its substrates, and established the fundamental conditions necessary for a comprehensive analysis.

Academic Significance and Societal Importance of the Research Achievements

グラム陰性菌の多剤耐性に関わる排出タンパク質複合体の機能を阻害する分子が開発されれば、治療効果が弱まったが承認されている抗菌剤が再び治療に活用でき、また、投薬量を減らすことができる可能性がある。これにより、抗菌薬の過剰投与による環境汚染や新たな耐性菌の発生リスクも抑えられる。本研究で確立した方法を用いれば、多剤排出タンパク質複合体の相関構造解析を効率的に進め、多剤耐性菌の問題解決に繋がると考えている。

Report

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

    (6 results)

All 2023 2022 Other

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

  • [Journal Article] Crystal structures of multidrug efflux transporters from Burkholderia pseudomallei suggest details of transport mechanism2023

    • Author(s)
      Kato Takaaki、Okada Ui、Hung Li-Wei、Yamashita Eiki、Kim Heung-Bok、Kim Chang-Yub、Terwilliger Thomas C.、Schweizer Herbert P.、Murakami Satoshi
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 120 Issue: 29 Pages: 1-12

    • DOI

      10.1073/pnas.2215072120

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Crystal structure of RND-type multidrug transporter MexB from Pseudomonas aeruginoasa at near neutral pH2023

    • Author(s)
      Ryou Yonehara, Etsuko Ishizaka-Ikeda, Atsushi Nakagawa, Eiki Yamashita
    • Organizer
      26rd Congress and General Assembly of the International Union of Crystallography (IUCr2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 多剤排出トランスポーターMexBの中性付近の結晶構造解析2023

    • Author(s)
      上田雄士, 米原涼, 池田悦子, 中川敦史, 山下栄樹
    • Organizer
      日本結晶学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 緑膿菌由来膜融合タンパク質MexXの機能解明に向けた構造解析2022

    • Author(s)
      上田雄士、荒谷剛史、米原涼、 池田悦子、堤研太、中川敦史、山下栄樹
    • Organizer
      日本結晶学会
    • Related Report
      2022 Research-status Report
  • [Remarks] 薬剤排出蛋白質複合体の構造生命科学研究

    • URL

      http://www.protein.osaka-u.ac.jp/rcsfp/supracryst/research/theme/yakuzai-haisyutu/

    • Related Report
      2023 Annual Research Report 2021 Research-status Report
  • [Remarks] 薬剤排出タンパク質複合体の構造生命科学研究

    • URL

      http://www.protein.osaka-u.ac.jp/rcsfp/supracryst/research/theme/yakuzai-haisyutu/

    • Related Report
      2022 Research-status Report

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Published: 2021-07-13   Modified: 2025-01-30  

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