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Structure basis for multidrug resistance efflux pump spanning both membranes in Pseudomonas aeruginosa

Research Project

Project/Area Number 19H03167
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 43020:Structural biochemistry-related
Research InstitutionOsaka University

Principal Investigator

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

Co-Investigator(Kenkyū-buntansha) 中川 敦史  大阪大学, 蛋白質研究所, 教授 (20188890)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2020: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2019: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Keywords膜蛋白質の物質輸送 / クライオ電子顕微鏡単粒子解析 / X線結晶構造解析 / 構造生物学
Outline of Research at the Start

複数の抗菌剤が効かない多剤耐性緑膿菌による免疫不全患者への院内感染は、重篤な症状を引き起こすため社会的に大きな問題となっている。日和見細菌である緑膿菌が多剤耐性化する主な原因として、菌体内に進入した抗菌剤を排出する異物排出タンパク質複合体が深く関与している。本研究では、緑膿菌で機能している異物排出タンパク質複合体のままの立体構造をクライオ電子顕微鏡単粒子解析法とX線結晶構造解析法を用いて解明し、異物を菌体外に排出するタンパク質間の連携した排出機構の構造基盤を構築することを目的とする。

Outline of Final Research Achievements

The efflux pump MexAB-OprM involved in multidrug resistance in Pseudomonas aeruginosa is composed of the transporter MexB in the inner membrane, the adapter protein MexA in the periplasmic region, and the outer membrane channel protein OprM in the outer membrane and is a giant membrane protein complex that spans two membranes. In this study, we succeeded for the structure analysis of the MexAB-OprM complex in the absence and presence of antimicrobials and clarified the mechanism of complex formation.

Academic Significance and Societal Importance of the Research Achievements

日和見細菌である緑膿菌は、健常者には感染症を発症しないが、免疫不全患者では重篤な症状をもたらす。特に多種の抗菌剤に耐性を持つ緑膿菌(多剤耐性緑膿菌)は院内感染を引き起こし社会問題の一つとなっている。多剤耐性化の原因の一つとして考えられている異物排出タンパク質複合体の構造は、新しい作用機序を持つ抗菌剤の開発へと繋がる

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (10 results)

All 2021 2020 2019 Other

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

  • [Journal Article] Critical roles of the CuB site in efficient proton pumping as revealed by crystal structures of mammalian cytochrome c oxidase catalytic intermediates2021

    • Author(s)
      Atsuhiro Shimada, Fumiyoshi Hara, Kyoko Shinzawa-Itoh, Nobuko Kanehisa, Eiki Yamashita, Kazumasa Muramoto2, Tomitake Tsukihara, and Shinya Yoshikawa
    • Journal Title

      Journal of Biological Chemistry

      Volume: 297 Issue: 3 Pages: 100967-100967

    • DOI

      10.1016/j.jbc.2021.100967

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structure and function relationship of OqxB efflux pump from Klebsiella pneumoniae2021

    • Author(s)
      Bharatham Nagakumar、Bhowmik Purnendu、Aoki Maho、Okada Ui、Sharma Sreevalli、Yamashita Eiki、Shanbhag Anirudh P.、Rajagopal Sreenath、Thomas Teby、Sarma Maitrayee、Narjari Riya、Nagaraj Savitha、Ramachandran Vasanthi、Katagihallimath Nainesh、Datta Santanu、Murakami Satoshi
    • Journal Title

      Nature Communications

      Volume: 12 Issue: 1 Pages: 1-12

    • DOI

      10.1038/s41467-021-25679-0

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] X-ray structures of catalytic intermediates of cytochrome c oxidase provide insights into its O2 activation and unidirectional proton-pump mechanisms2020

    • Author(s)
      A. Shimada, Y. Etoh, R. Kitoh-Fujisawa, A. Sasaki, K. Shinzawa-Itoh, T. Hiromoto, E. Yamashita, K. Muramoto, T. Tsukihara, S. Yoshikawa
    • Journal Title

      J. Biol. Chem.

      Volume: 295 Issue: 17 Pages: 5818-5833

    • DOI

      10.1074/jbc.ra119.009596

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 緑膿菌由来の2つの膜を貫く巨大な排出ポンプMexAB-OprMの構造2020

    • Author(s)
      堤研太、山下栄樹
    • Journal Title

      Farumashia

      Volume: 56 Issue: 6 Pages: 504-508

    • DOI

      10.14894/faruawpsj.56.6_504

    • NAID

      130007850167

    • ISSN
      0014-8601, 2189-7026
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structures of the wild-type MexAB-OprM tripartite pump reveal its complex formation and drug efflux mechanism2019

    • Author(s)
      Tsutsumi Kenta、Yonehara Ryo、Ishizaka-Ikeda Etsuko、Miyazaki Naoyuki、Maeda Shintaro、Iwasaki Kenji、Nakagawa Atsushi、Yamashita Eiki
    • Journal Title

      Nature Communications

      Volume: 10 Issue: 1 Pages: 1520-1520

    • DOI

      10.1038/s41467-019-09463-9

    • NAID

      120007127833

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Phage tail fibre assembly proteins employ a modular structure to drive the correct folding of diverse fibres2019

    • Author(s)
      North Olesia I.、Sakai Kouhei、Yamashita Eiki、Nakagawa Atsushi、Iwazaki Takuma、Buttner Carina R.、Takeda Shigeki、Davidson Alan R.
    • Journal Title

      Nature Microbiology

      Volume: 4 Issue: 10 Pages: 1645-1653

    • DOI

      10.1038/s41564-019-0477-7

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Low-dose X-ray structure analysis of cytochrome c oxidase utilizing high-energy X-rays.2019

    • Author(s)
      G. Ueno, A. Shimada, E. Yamashita, K. Hasegawa, T. Kumasaka, K. Shinzawa-Itoh, S. Yoshikawa, T. Tsukihara, M. Yamamoto.
    • Journal Title

      J Synchrotron Radiat.

      Volume: 26 Issue: 4 Pages: 912-921

    • DOI

      10.1107/s1600577519006805

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Observation of unexpected molecular binding activity for Mu phage tail fibre chaperones2019

    • Author(s)
      Sakai Kohei、Iwazaki Takuma、Yamashita Eiki、Nakagawa Atsushi、Sakuraba Fumiya、Enomoto Atsushi、Inagaki Minoru、Takeda Shigeki
    • Journal Title

      The Journal of Biochemistry

      Volume: 166 Issue: 6 Pages: 529-535

    • DOI

      10.1093/jb/mvz068

    • NAID

      40022093078

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [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
      2021 Annual Research Report 2020 Annual Research Report
  • [Remarks] 超分子構造解析研究室

    • URL

      http://www.protein.osaka-u.ac.jp/rcsfp/supracryst/

    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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