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Development of knowledge-based method for prediction of antigenic peptide binding to HLA

Research Project

Project/Area Number 19K07029
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 47020:Pharmaceutical analytical chemistry and physicochemistry-related
Research InstitutionShowa University

Principal Investigator

Gouda Hiroaki  昭和大学, 薬学部, 教授 (60276160)

Project Period (FY) 2019-04-01 – 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 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsHLA / 抗原ペプチド / 相互作用 / データベース / 免疫反応 / 重症薬疹 / 主要組織適合遺伝子複合体 / 抗原 / 知識ベース / 粗視化モデル / 主要組織適合性複合体
Outline of Research at the Start

本研究では、これまでに報告されている、ヒト主要組織適合性複合体HLAクラスI(HLA-I)分子と抗原ペプチドの複合体構造情報に基づいた知識ベース手法により、解析対象とするHLA-Iに結合できる抗原ペプチドを予測する手法の開発を目指す。この抗原ペプチド予測手法は、自己免疫疾患、がん、及び難治性感染症などの病因解析や治療に役立つ可能性がある。

Outline of Final Research Achievements

Based on crystal structures of human leukocyte antigen class I (HLA-I) molecules complexed with antigenic peptides, a database (DB) of interactions between HLA-I antigen-binding pocket and antigen amino acid residue was constructed. The DB consists of (1) atomic coordinates of amino acid residues constituting the pocket, (2) coordinates of property spheres placed on the pocket, and (3) atomic coordinates of the antigen amino acid residue bound to the pocket. Five types of property spheres were used to simply describe physicochemical properties of the pocket. By retrieving pockets from the DB with similar arrangement of property spheres to that of the HLA-I pocket of interest, it is possible to predict the tendency of antigen amino acid residue to bind to the HLA-I pocket of interest. Even if a drug is bound to the HLA-I, the prediction of tendency of antigen amino acid residue to bind to the HLA-I/drug complex structure is also possible by describing the drug using property spheres.

Academic Significance and Societal Importance of the Research Achievements

ヒトの主要組織適合性複合体であるHLAクラスI(HLA-I)分子は、「自己」と「非自己」の識別などの免疫反応において重要な役割を果たしているタンパク質であり、抗原ペプチドを免疫細胞に提示する役割を担っている。また、HLA-Iに薬物が結合することで、HLA-Iが提示する抗原ペプチドが変化し、このことが重症薬疹の引き金となる可能性が示唆されている。したがって、本研究の抗原ペプチド予測手法は、自己免疫疾患などの病因解析や治療に役立つ可能性がある。

Report

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

    (2 results)

All 2021 2020

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

  • [Journal Article] A molecular interaction field describing nonconventional intermolecular interactions and its application to protein-ligand interaction prediction2020

    • Author(s)
      Daichi Hayakawa, Nahoko Sawada, Yurie Watanabe, Hiroaki Gouda
    • Journal Title

      Journal of Molecular Graphics and Modelling

      Volume: 96 Pages: 107515-107515

    • DOI

      10.1016/j.jmgm.2019.107515

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 物理化学的性質を表す特性球に基づいたHLA-抗原ペプチド相互作用のデータベース構築と解析2021

    • Author(s)
      早川大地、渡邉友里江、合田浩明
    • Organizer
      日本薬学会第141年会
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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