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Elucidation of the molecular recognition of stereotype rheumatoid factor.

Research Project

Project/Area Number 19K06514
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 InstitutionTokyo University of Science

Principal Investigator

Shiroishi Mitsunori  東京理科大学, 先進工学部生命システム工学科, 准教授 (00380527)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsリウマトイド因子 / 自己抗体 / 分子認識 / 構造解析 / 結晶構造解析
Outline of Research at the Start

IgGの自己抗体であるリウマトイド因子(RF)の中でも、“ステレオタイプRF”は特に高頻度で産生される。申請者らは生殖系列遺伝子IGHV1-69由来のステレオタイプRFの1つについて結晶構造を解明し、分子認識メカニズムの仮説を提唱した。本研究ではこの仮説を検証し、さらに別の生殖系列(IGHV3-7とIGHV4-59)由来のRFについて、Fcとの複合体の結晶構造を明らかにし、ステレオタイプRFにおける自己抗原認識の普遍的原理の解明を目指す。

Outline of Final Research Achievements

We have established a large-scale preparation system for YES8c, which is a rheumatoid factor (RF) derived from IGHV1-69, and RF-SJ1, which is an RF derived from TS1 and IGHV3-30, in the Fv-clasp format. YES8c Fv-clasp showed the same binding property as its Fab. On the other hand, Fv-clasp of RF-TS1 showed different binding in ELISA and SPR analysis. It is suggested that this may be due to the antigen recognition mechanism due to the weak affinity between the H chain and the L chain. For YES8c, it was suggested that the N-terminal of the L chain is involved in antigen recognition.

Academic Significance and Societal Importance of the Research Achievements

ステレオタイプリウマトイド因子(RF)の元になる抗体の生殖系列遺伝子は、ウィルスや細菌毒素の中和抗体として頻繁に使われることが分かっており、慢性炎症と密接に関係していると言われている。ステレオタイプRFの普遍的な分子認識メカニズムを構造学的に明らかにすることで、慢性炎症から発展する種々の血液疾患に適した治療法の開発などに有益な情報をもたらすことが期待できる。

Report

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

    (6 results)

All 2022 2021 2020 2019

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

  • [Journal Article] Improvement of the affinity of an anti-rat P2X4 receptor antibody by introducing electrostatic interactions2022

    • Author(s)
      Shinozaki Chinatsu、Kohno Keita、Shiroishi Mitsunori、Takahashi Daisuke、Yoshikawa Yu、Abe Yoshito、Hamase Kenji、Nakakido Makoto、Tsumoto Kohei、Inoue Kazuhide、Tsuda Makoto、Ueda Tadashi
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 131-131

    • DOI

      10.1038/s41598-021-03784-w

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structural Basis of a Conventional Recognition Mode of IGHV1-69 Rheumatoid Factors.2020

    • Author(s)
      Shiroishi M.
    • Journal Title

      Adv Exp Med Biol.

      Volume: - Pages: 1-12

    • DOI

      10.1007/5584_2020_510

    • ISBN
      9783030678135, 9783030678142
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Structural and Functional Basis for LILRB Immune Checkpoint Receptor Recognition of HLA-G Isoforms2019

    • Author(s)
      Kuroki Kimiko、Matsubara Haruki、Kanda Ryo、Miyashita Naoyuki、Shiroishi Mitsunori、Fukunaga Yuko、Kamishikiryo Jun、Fukunaga Atsushi、Fukuhara Hideo、Hirose Kaoru、Hunt Joan S.、Sugita Yuji、Kita Shunsuke、Ose Toyoyuki、Maenaka Katsumi
    • Journal Title

      The Journal of Immunology

      Volume: 203 Issue: 12 Pages: 3386-3394

    • DOI

      10.4049/jimmunol.1900562

    • NAID

      120007018379

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Fv-clasp化したリウマトイド因子YES8cの大量調製と評価2021

    • Author(s)
      山本真瑠人、船田涼馬、瀧亮太、白石充典
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] リウマトイド因子RF-TS1 Fv-claspの大量調製と評価2021

    • Author(s)
      西崎恵菜美、白石充典
    • Organizer
      第44回日本分子生物学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Preparation and crystallization of Fv-clasp of the rheumatoid factor RF-TS12020

    • Author(s)
      西崎恵菜美,白石充典
    • Organizer
      第43回日本分子生物学会年会
    • Related Report
      2020 Research-status Report

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

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