• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Structural and Functional analysis on tripartite ABC transporters.

Research Project

Project/Area Number 21H02412
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 InstitutionTokyo Institute of Technology

Principal Investigator

Murakami Satoshi  東京工業大学, 生命理工学院, 教授 (30300966)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2021: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Keywords構造生物学 / 膜輸送体 / 多剤耐性 / X線結晶構造解析 / 膜輸送 / 薬剤耐性 / 外膜蛋白質 / 膜蛋白質 / 薬剤耐性化
Outline of Research at the Start

グラム陰性細菌はその薬剤自然抵抗性により抗生物質や抗菌剤に対して耐性をしめし、院内感染などでしばしば問題となる。細胞膜と外膜と2枚の膜を持つことによる薬剤の透過性の悪さがその原因と古くは考えられていたが、そこに横たわる三者複合体形成型の膜輸送体による薬剤排出が真の薬剤耐性の責任蛋白質であることが分かった。我々はその構造と機能を本質的に理解するという基礎研究を通して、その知見をグラム陰性細菌による薬剤耐性化の克服に繋げたいと考えている。

Outline of Final Research Achievements

We succeeded in identifying functional residues directly involved in substrate transport by optical crosslinking analysis (co-author) on the tripartite-type ABC transporter, LolCDE, the main target of this study. By mapping these residues on a homology model derived from our crystal structure of MacB, we clarified the substrate translocation pathway through the substrate-binding pocket in the periplasmic domain of the LolCDE. We also succeeded in elucidating the structure-based mechanism of another multidrug efflux transporters, BpeB and BpeF, that forms a tripartite complex with the outer membrane channel TolC and a homolog of the periplasmic adaptor protein, MacA.

Academic Significance and Societal Importance of the Research Achievements

LolCDE系はグラム陰性細菌にとって生育に不可欠な蛋白質群であり、その阻害による抗菌剤開発など新たな作用機序をもつ抗菌剤開発へと繋がる可能性がある。その分子機構解明は近年社会問題となっている多剤耐性化(AMR)の対策へ繋がる知見となり、社会的な意義の高いものといえる。また、直接的に薬剤排出に関わる蛋白質群の構造機能解析に於ける成果も同様の理由により社会的注目が大きい。
新たに認知されたVII型ABC輸送体であるLolCDEやMacBの構造機能解析において我々は世界のトップランナーである。それ故、輸送体関連の教科書などへの執筆依頼も複数受けていることを研究成果として付記しておきたい。

Report

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

    (18 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (5 results) Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 8 results,  Open Access: 7 results) Presentation (3 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Book (1 results) Remarks (1 results)

  • [Int'l Joint Research] Los Alamos National Laboratory/New Mexico Consortium/Northern Arizona University(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Bugworks, Inc.(インド)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Los Alamos National Laboratory/New Mexico Consortium/Northern Arizona University(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Bugworks, Inc.(インド)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] The University of Cambridge(英国)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Dissection of an ABC transporter LolCDE function analyzed by photo-crosslinking2024

    • Author(s)
      Tao Kazuyuki、Narita Shin-ichiro、Okada Ui、Murakami Satoshi、Tokuda Hajime
    • Journal Title

      The Journal of Biochemistry

      Volume: 175 Issue: 4 Pages: 427-437

    • DOI

      10.1093/jb/mvad118

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of key amino acid residues in OqxB mediated efflux of fluoroquinolones using site-directed mutagenesis2023

    • Author(s)
      Bhowmik Purnendu、Bharatham Nagakumar、Murakami Satoshi、Ramachandran Vasanthi、Datta Santanu
    • Journal Title

      Research in Microbiology

      Volume: 174 Issue: 4 Pages: 104039-104039

    • DOI

      10.1016/j.resmic.2023.104039

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Structure-Based Analysis of Transient Interactions between Ketosynthase-like Decarboxylase and Acyl Carrier Protein in a Loading Module of Modular Polyketide Synthase2023

    • Author(s)
      Chisuga Taichi、Murakami Satoshi、Miyanaga Akimasa、Kudo Fumitaka、Eguchi Tadashi
    • Journal Title

      ACS Chemical Biology

      Volume: 18 Issue: 6 Pages: 1398-1404

    • DOI

      10.1021/acschembio.3c00151

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [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
  • [Journal Article] Structural and functional characteristics of the tripartite ABC transporter2022

    • Author(s)
      Okada Ui、Murakami Satoshi
    • Journal Title

      Microbiology

      Volume: 168 Issue: 11 Pages: 1-15

    • DOI

      10.1099/mic.0.001257

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Real-time monitoring of polyacrylamide gel electrophoresis by the shadowgraph technique2022

    • Author(s)
      Murakami Satoshi、Adachi Hiroaki、Matsumura Hiroyoshi、Takano Kazufumi、Inoue Tsuyoshi、Mori Yusuke
    • Journal Title

      The Journal of Biochemistry

      Volume: 173 Issue: 2 Pages: 65-72

    • DOI

      10.1093/jb/mvac087

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Engineered MATE multidrug transporters reveal two functionally distinct ion-coupling pathways in NorM from Vibrio cholerae2021

    • Author(s)
      Raturi Sagar、Nair Asha V.、Shinoda Keiko、Singh Himansha、Bai Boyan、Murakami Satoshi、Fujitani Hideaki、van Veen Hendrik W.
    • Journal Title

      Communications Biology

      Volume: 4 Issue: 1 Pages: 1-17

    • DOI

      10.1038/s42003-021-02081-6

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [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
  • [Presentation] Twenty years structural study of RND transporters, the most potent multidrug efflux transporters, of Gram-negative bacteria. ~ For overcoming the drug resistance problem2024

    • Author(s)
      Murakami Satoshi
    • Organizer
      International Conference on New Horizons in Bioengineering: Fostering Academia-Industry Partnership
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Structural basis of multidrug resistance in Gram negative bacteria2024

    • Author(s)
      Murakami Satoshi
    • Organizer
      International Conference on Structural Biology & Drug Discovery (ICSBDD-2024)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Crystal structures of multidrug efflux transporters from Burkholderia pseudomallei suggest details of transport mechanism2023

    • Author(s)
      Okada, U., Kato, T., Huang, L.-W., Yamashita, E., Kim, H.-B., Kim, C.-Y., Terwillger, T., Schweizer, H., Murakami, S.
    • Organizer
      Gordon Research Conference
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Book] Therapeutic Protein Targets for Drug Discovery and Clinical Evaluation: Bio-crystallography and Drug Design2022

    • Author(s)
      Okada, U., Murakami, S.
    • Total Pages
      23
    • Publisher
      World Scientific Pub Co Inc
    • ISBN
      9811254788
    • Related Report
      2022 Annual Research Report
  • [Remarks] バークホルデリア菌の多剤排出ポンプの結晶構造解析に成功

    • URL

      https://www.titech.ac.jp/news/2023/067130

    • Related Report
      2023 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi