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Functional analysis of peroxisomal membrane translocator

Research Project

Project/Area Number 16K07275
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Structural biochemistry
Research InstitutionKyushu University

Principal Investigator

Tamura Shigehiko  九州大学, 基幹教育院, 教授 (90236753)

Co-Investigator(Kenkyū-buntansha) 藤木 幸夫  九州大学, 生体防御医学研究所, 特任教授 (70261237)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsペルオキシソーム / 膜透過輸送 / 病因変異解析 / リン酸化 / ペルオキシソーム欠損症 / 病因解析 / タンパク質輸送 / 複合体形成 / タンパク質相互作用 / ペルオキシソーム形成因子 / 細胞内小器官 / タンパク質複合体 / 恒常性維持
Outline of Final Research Achievements

Peroxisomal matrix proteins are imported into peroxisomes via membrane-bound docking/translocation complex comprising as a major component membrane peroxin Pex14p that binds Pex5p. In this study, we isolated three types of Pex14p complexes, termed complexes I, II, and III, as a docking/translocation complex. Transition of Pex14p complex structures between complexes I, II, and III more likely plays important roles in matrix protein import.
Next, using clinical exome sequencing (ES), we identified an autosomal recessive missense variant, c.153C>A (p.F51L), in the peroxisome biogenesis factor 26 gene (PEX26) in a 19-yr-old female who was referred for moderate to severe hearing loss. The functional data of Pex26p support the mild phenotype of non-syndromic hearing loss in patients harboring the F51L variant in PEX26.

Academic Significance and Societal Importance of the Research Achievements

本課題研究にてペルオキシソーム膜透過輸送装置を同定し、リン酸化による機能制御システムを明らかにしたことで、その生合成機構の全容解明に向けた分子レベルでの手がかりを得ることができた。また、PEX26の病因変異解析から、ペルオキシソーム代謝障害と聴覚障害の相関を明らかにした。つまり、タンパク質の細胞内選別輸送やオルガネラ形成とその恒常性維持などプロテインキネシスにおける課題解明だけでなく、中枢神経系の中でもとくに聴覚神経細胞の発達と維持のメカニズム解明など医学領域への多大な貢献が期待できる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (10 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (6 results)

  • [Int'l Joint Research] コロンビア大学(米国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] A newly identified mutation in the PEX26 gene is associated with a milder form of Zellweger spectrum disorder.2019

    • Author(s)
      Tanaka, A. J., Okumoto, K., Tamura, S., Abe, Y., Hirsch, Y., Deng, L., Ekstein, J., Chung, W. K., and Fujiki Y.
    • Journal Title

      Cold Spring Harb. Mol. Case Stud.

      Volume: 5 Issue: 1 Pages: 1-16

    • DOI

      10.1101/mcs.a003483

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Peroxisome biogenesis deficiency attenuates the BDNF-TrkB pathway-mediated development of the cerebellum2018

    • Author(s)
      Abe Yuichi、Honsho Masanori、Itoh Ryota、Kawaguchi Ryoko、Fujitani Masashi、Fujiwara Kazushirou、Hirokane Masaaki、Matsuzaki Takashi、Nakayama Keiko、Ohgi Ryohei、Marutani Toshihiro、Nakayama Keiichi I、Yamashita Toshihide、Fujiki Yukio
    • Journal Title

      Life Science Alliance

      Volume: 1 Issue: 6 Pages: 1-17

    • DOI

      10.26508/lsa.201800062

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Blue-Native PAGE: Applications to study on peroxisome biogenesis.2017

    • Author(s)
      Okumoto, K., Tamura, S., and Fujiki, Y.
    • Journal Title

      Schrader, M. (ed.) Peroxisomes: Methods and Protocols, Methods in Molecular Biology (Series Ed.: Walker, J.M.)

      Volume: 1595 Pages: 197-205

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] ペルオキシソーム形成因子Pex14pの細胞周期依存的なリン酸化による機能制御2018

    • Author(s)
      山下昂一郎、田村茂彦、藤木幸夫
    • Organizer
      生化学会九州支部例会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ペルオキシソーム形成因子Pex14pの細胞周期依存的なリン酸化による機能制御メカニズムの解析2018

    • Author(s)
      山下昂一郎、田村茂彦、藤木幸夫
    • Organizer
      第91回 日本生化学会大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ペルオキシソーム膜透過輸送にはPex14p複合体の動的な構造変化が必要である2017

    • Author(s)
      河村優子、田村茂彦、藤木幸夫
    • Organizer
      新学術領域研究「新生鎖の生物学」班会議
    • Related Report
      2017 Research-status Report
  • [Presentation] Peroxisomal matrix protein import: Identification of core components of membrane translocator2017

    • Author(s)
      田村茂彦、河村優子、藤木幸夫
    • Organizer
      第90回日本生化学会 ConBio 2017
    • Related Report
      2017 Research-status Report
  • [Presentation] ペルオキシソーム膜透過輸送にはPex14p複合体の動的な構成変化が必要である2016

    • Author(s)
      河村優子、田村茂彦、藤木幸夫
    • Organizer
      第39回日本分子生物学会
    • Place of Presentation
      パシフィコ横浜(横浜市)
    • Year and Date
      2016-11-30
    • Related Report
      2016 Research-status Report
  • [Presentation] Identification of core components of peroxisomal membrane translocator2016

    • Author(s)
      Shigehiko Tamura, Yuko Kawamura and Yukio Fujiki
    • Organizer
      The 89th Annual Meeting of the Japanese Biochemical Society
    • Place of Presentation
      東北大学(仙台市)
    • Year and Date
      2016-09-25
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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