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Membrane permeation processes and inter-molecular interactions of Cryptdin-4 studied by molecular dynamics simulations

Research Project

Project/Area Number 21K06037
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 InstitutionNagahama Institute of Bio-Science and Technology

Principal Investigator

Takao Yoda  長浜バイオ大学, バイオサイエンス学部, 准教授 (50367900)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords抗菌ペプチド / 分子動力学シミュレーション / 抗微生物ペプチド
Outline of Research at the Start

抗微生物ペプチドは、細菌などの外敵から身を守るためにヒトを含む哺乳類だけでなく昆虫や植物など幅広い生物が持っているペプチドである。抗微生物ペプチドは微生物の細胞表面の膜を破壊するが、そのメカニズムは抗微生物ペプチドの種類により様々である。種々のシミュレーション手法を活用することにより、高い抗菌活性で知られる抗微生物ペプチドCryptdin-4の抗菌作用のメカニズムを解明するための研究を行う。

Outline of Final Research Achievements

Crytpdin-4 (Crp4) is an α-defensin expressed in the small intestine of mice. The interaction of Crp4 with negatively charged lipid bilayers increases the membrane permeability of small molecules. At the same time, Crp4 itself also permeates the membrane. Here, we performed membrane formation simulations to clarify the intermolecular interactions and to gain insight into the relationship between Crp4 membrane permeation and the increased membrane permeability of small molecules. Data analysis of our membrane self-assembly simulations in which Crp4 was found in the formed membranes revealed the spatial distribution of ions and small molecules such as water, head groups of lipids, and fluorescent dyes, as well as the characteristics of their intermolecular interactions.

Academic Significance and Societal Importance of the Research Achievements

抗菌ペプチドと脂質二重層の相互作用は、典型的な蛋白質間相互作用に見られる鍵と鍵穴のタイプの相互作用と比べると、立体構造的な特異性が低いと考えられる。この性質のため、分子動力学シミュレーションは有力な研究手段となる。本研究では、ペプチドの濃度や分子表面の性質、膜を構成する脂質の組成、水に溶けている低分子などの影響を受ける抗菌ペプチドの相互作用を膜形成シミュレーションにより研究した。得られた成果は活性メカニズムの理解に資すると期待される。

Report

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

    (2 results)

All 2022 2021

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Intermolecular Interactions between a Membrane Protein and a Glycolipid Essential for Membrane Protein Integration2022

    • Author(s)
      Mori Shoko、Nomura Kaoru、Fujikawa Kohki、Osawa Tsukiho、Shionyu Masafumi、Yoda Takao、Shirai Tsuyoshi、Tsuda Shugo、Yoshizawa-Kumagaye Kumiko、Masuda Shun、Nishio Hideki、Yoshiya Taku、Suzuki Sonomi、Muramoto Maki、Nishiyama Ken-ichi、Shimamoto Keiko
    • Journal Title

      ACS Chemical Biology

      Volume: 17 Issue: 3 Pages: 609-618

    • DOI

      10.1021/acschembio.1c00882

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Conformations and distributions of Cryptdin-4, lipids, and water observed in membrane self-assembly molecular dynamics simulations2021

    • Author(s)
      依田隆夫
    • Organizer
      日本生物物理学会第59回年会
    • Related Report
      2021 Research-status Report

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

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