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Structural basis of the blood-testis barrier based on structural analysis of human claudin-11.

Research Project

Project/Area Number 18K06100
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43020:Structural biochemistry-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Shinoda Takehiro  国立研究開発法人理化学研究所, 生命機能科学研究センター, 研究員 (10597868)

Co-Investigator(Kenkyū-buntansha) 松波 秀行  沖縄科学技術大学院大学, 生体分子電子顕微鏡解析ユニット, スタッフサイエンティスト (80444511)
染谷 友美  国立研究開発法人理化学研究所, 生命機能科学研究センター, 客員研究員 (80450401)
Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords膜タンパク質 / 大腸菌無細胞タンパク質合成技術 / 密着結合 / モノクローナル抗体 / クライオ電子顕微鏡 / X線結晶構造解析 / 血液精巣関門 / 立体構造解析
Outline of Final Research Achievements

In this study, we have established a method for the preparation of high-quality samples of human claudin-11, a tight junction membrane protein involved in the function of the blood-testis barrier, using an E. coli cell-free protein synthesis technology.
By using this cell-free synthesized human claudin-11 as an immunogen and as an antigen for screening, we have obtained a monoclonal hybridoma that produces a structure-recognizing anti-human claudin-11 antibody, which is useful for structural analysis. In addition, single-particle analysis of the complex with the antibody fragment using cryo-electron microscopy has allowed to capture the binding of claudin to the antibody from a two-dimensional particle image and a low-resolution three-dimensional map.

Academic Significance and Societal Importance of the Research Achievements

ヒトクローディン-11の高品質精製試料の生産手法の確立は本研究課題が初となる。これにより、ヒトクローディン-11を標的とした新規薬剤の探索や効果測定においても分子レベルでの実験と評価が可能となる。また、同じく本研究課題内で作成した立体構造認識性の抗ヒトクローディン-11モノクローナル抗体についても抗体医薬品としての利用の可能性を秘めていることから、本研究成果は、男性型不妊症、特にクローディン-11の発現異常を原因とする先天性男性型不妊症の研究および治療手法の創出に大いに貢献できるものと期待している。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (2 results)

All 2019 2018

All Journal Article (1 results) Presentation (1 results)

  • [Journal Article] Preparation techniques using an Escherichia coli cell-free system to produce membrane proteins for structural analysis2018

    • Author(s)
      篠田 雄大、染谷 友美
    • Journal Title

      生化学

      Volume: 90 Issue: 4 Pages: 539-539

    • DOI

      10.14952/SEIKAGAKU.2018.900539

    • NAID

      40021670779

    • ISSN
      0037-1017
    • Year and Date
      2018-08-25
    • Related Report
      2018 Research-status Report
  • [Presentation] ヒトクローディン-11の立体構造解析に向けたモノクローナル抗体作製2019

    • Author(s)
      篠田雄大、新屋直子、染谷友美、白水美香子
    • Organizer
      第92回生化学会大会
    • Related Report
      2019 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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