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Bacterial pathogen-mediated tiered regulations on the host ubiquitin system

Research Project

Project/Area Number 19H03469
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 49050:Bacteriology-related
Research InstitutionGifu University

Principal Investigator

Kubori Tomoko  岐阜大学, 大学院医学系研究科, 准教授 (20397657)

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: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2020: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2019: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Keywordsユビキチン / エフェクター / レジオネラ / 細菌感染 / 脱ユビキチン化 / ユビキチンリガーゼ
Outline of Research at the Start

ユビキチン修飾系は真核生物が普遍的に持つシステムであり、細胞の機能を文字どおり支配する中核的な修飾系である。驚くべきことに、原核生物である細菌もユビキチン修飾系を持つことが近年次々と明らかにされている。病原細菌レジオネラは、ユビキチン修飾やその制御に関わるタンパク質を数多く持ち、極めて多彩な方法で宿主細胞のユビキチンシステムを撹乱すると考えられている。本研究課題では、レジオネラの保有する多様なユビキチン関連タンパク質群の間での機能的な階層性を明らかにし、病原細菌が宿主真核細胞の機能を破綻させて病態を引き起こす巧妙なメカニズムの一端を明らかにすることを目指す。

Outline of Final Research Achievements

Legionella pneumophila, a bacterial pathogen which causes Legionnaires’ disease, transports numerous “effector proteins” to the host cell cytosol to accomplish intracellular replication by hijacking cellular systems. Here, we have focused on the tiered structure of the effector functions and aimed to understand in a molecular level how this bacterium manipulates the host ubiquitin system which is known to play pivotal roles in regulating cellular functions. We identified a novel Legionella E3 ligase, and further identified another effector proteins which can chemically modify the E3 ligase to down-regulate its function. This finding demonstrates an example of elaborate bacterial strategies which can be executed by multiple effector proteins with their sequential enzymatic activities.

Academic Significance and Societal Importance of the Research Achievements

近年、真核細胞で確認されていない特殊な化学修飾を触媒する酵素群が病原細菌から次々と見つかっている。特に病原細菌レジオネラはその保有する酵素群の多様性、特殊性において並外れており、細菌学の枠組みを超え、有機化学、酵素学、構造生物学を含む分野横断的な研究対象として注目を集めている。本研究課題では、レジオネラ酵素が触媒する化学修飾の特異性のみならず、その機能の階層性に光をあてた。本成果は、病原細菌が実現する細胞内での精緻な調節機構を解明し病態発症の分子メカニズムへの理解を導く一つの足掛かりと位置付けられる。レジオネラを始めとする細菌感染症防除の創薬開発にこれまでにない視点を与えるものと考える。

Report

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

    (23 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (10 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 10 results,  Open Access: 5 results) Presentation (10 results) (of which Int'l Joint Research: 4 results,  Invited: 2 results) Remarks (1 results)

  • [Int'l Joint Research] KAIST Institute for the BioCentury(韓国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Oregon Health & Science University(米国)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Structural Basis of Ubiquitin Recognition by a Bacterial Ovarian Tumor Deubiquitinase LotA2022

    • Author(s)
      Takekawa Norihiro、Kubori Tomoko、Iwai Tomoya、Nagai Hiroki、Imada Katsumi
    • Journal Title

      Journal of Bacteriology

      Volume: 204 Issue: 1

    • DOI

      10.1128/jb.00376-21

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Recent advances in structural studies of the Legionella pneumophila Dot/Icm type IV secretion system2022

    • Author(s)
      Kitao Tomoe、Kubori Tomoko、Nagai Hiroki
    • Journal Title

      Microbiology and Immunology

      Volume: 66 Issue: 2 Pages: 67-74

    • DOI

      10.1111/1348-0421.12951

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Requirement of phosphatidic acid binding for distribution of bacterial protein targeting syntaxin 172022

    • Author(s)
      Murata Misaki、Kanamori Riku、Kitao Tomoe、Kubori Tomoko、Nagai Hiroki、Tagaya Mitsuo、Arasaki Kohei
    • Journal Title

      Journal of Cell Science

      Volume: 135 Issue: 6 Pages: 259538-259538

    • DOI

      10.1242/jcs.259538

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reversible modification of mitochondrial ADP/ATP translocases by paired Legionella effector proteins2022

    • Author(s)
      Tomoko Kubori, Junyup Lee, Hyunmin Kim, Kohei Yamazaki, Masanari Nishikawa, Tomoe Kitao, Byung-Ha Oh, Hiroki Nagai
    • Journal Title

      Proceedings of the National Academy of Science

      Volume: 未定

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Legionella hijacks the host Golgi-to-ER retrograde pathway for the association of Legionella-Containing vacuole with the ER2021

    • Author(s)
      Kawabata Mio、Matsuo Honoka、Koito Takumi、Murata Misaki、Kubori Tomoko、Nagai Hiroki、Tagaya Mitsuo、Arasaki Kohei
    • Journal Title

      PLOS Pathogens

      Volume: 17 Issue: 3 Pages: e1009437-e1009437

    • DOI

      10.1371/journal.ppat.1009437

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 病原細菌レジオネラによるユビキチンを介した宿主小胞輸送システムの操作2021

    • Author(s)
      北尾公英、久堀智子、永井宏樹
    • Journal Title

      生化学

      Volume: 93 Pages: 6-6

    • NAID

      40022783955

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Protocol for imaging proteins associated with Legionella-containing vacuoles in host cells2021

    • Author(s)
      Kitao T, Arasaki K, Nagai H, Kubori T.
    • Journal Title

      STAR Protoc.

      Volume: 29;2(2) Issue: 2 Pages: 100410-100410

    • DOI

      10.1016/j.xpro.2021.100410

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Legionella Manipulates Non-canonical SNARE Pairing Using a Bacterial Deubiquitinase.2020

    • Author(s)
      Tomoe Kitao, Kyoichiro Taguchi, Shintaro Seto, Kohei Arasaki, Hiroki Ando, Hiroki Nagai, Tomoko Kubori
    • Journal Title

      Cell Reports

      Volume: 32(10) Issue: 10 Pages: 108107-108107

    • DOI

      10.1016/j.celrep.2020.108107

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Divergence of Legionella Effectors Reversing Conventional and Unconventional Ubiquitination.2020

    • Author(s)
      Tomoe Kitao, Hiroki Nagai, Tomoko Kubori
    • Journal Title

      Frontiers in Cellular and Infection Microbiology

      Volume: 10 Pages: 448-448

    • DOI

      10.3389/fcimb.2020.00448

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Emerging insights into bacterial deubiquitinases2019

    • Author(s)
      Tomoko kubori, Tomoe Kitao, Hiroki Ando
    • Journal Title

      Current Opinion in Microbiology

      Volume: 47 Pages: 14-19

    • DOI

      10.1016/j.mib.2018.10.001

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] レジオネラ菌の脱ユビキチン化酵素LotAによるユビキチン認識の構造的基盤2021

    • Author(s)
      竹川宜宏、久堀智子、岩井朋也、永井宏樹、今田勝巳
    • Organizer
      第94回日本生化学会大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] レジオネラエフェクターの細胞内機能2020

    • Author(s)
      久堀智子
    • Organizer
      第 94 回日本感染症学会学術講演会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Legionella manipulates non-canonical SNARE pairing using a bacterial deubiquitinase2020

    • Author(s)
      Tomoe Kitao, Kyoichiro Taguchi, Shintaro Seto, Kohei Arasaki, Hiroki Ando, Hiroki Nagai H, Tomoko Kubori
    • Organizer
      the IUMS 2020 Virtual Congresses
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Vacuole manipulation by Legionella deubiqutinases2020

    • Author(s)
      久堀智子
    • Organizer
      第93回日本細菌学会総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] レジオネラエフェクターの細胞内機能2020

    • Author(s)
      久堀智子
    • Organizer
      第94回日本感染症学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 細菌の病原性制御システム2020

    • Author(s)
      北尾公英、久堀智子、永井宏樹
    • Organizer
      第93回日本細菌学会総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Manipulation of the host ubiquitin system by Legionella2019

    • Author(s)
      Tomoko Kubori
    • Organizer
      Cold Spring Harbor Asia Conference on Bacterial Infection and Host Defense
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Legionella manipulates non-canonical SNARE pairing by the function of a bacterial deubiquitinase2019

    • Author(s)
      Tomoko Kubori
    • Organizer
      The 18th Awaji International Forum on Infection and Immunity
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 宿主SNARE pairing を操作するレジオネラエフェクターの解析2019

    • Author(s)
      北尾公英、田口馨一郎、瀬戸真太郎、新崎恒平、安藤弘樹、永井宏樹、久堀智子
    • Organizer
      第56回日本細菌学会中部支部総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Legionella manipulates non-canonical SNARE pairing by the function of a bacterial deubiquitinase2019

    • Author(s)
      Tomoe Kitao, Kohei Arasaki, Shintaro Seto, Kyoichiro Taguchi, Hiroki Nagai, Tomoko Kubori
    • Organizer
      Microbial Adhesion and Signal Transduction - Gordon Research Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Remarks] Nagai lab

    • URL

      https://sites.google.com/view/nagai-lab/home

    • Related Report
      2021 Annual Research Report 2020 Annual Research Report 2019 Annual Research Report

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

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