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Structure and function of pufferfish toxin, tetrodotoxin, binding proteins as biological defense agent

Research Project

Project/Area Number 19K06241
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 40040:Aquatic life science-related
Research InstitutionNiigata Agro-Food University

Principal Investigator

Nagashima Yuji  新潟食料農業大学, 食料産業学科, 教授 (40180484)

Co-Investigator(Kenkyū-buntansha) 岡井 公彦  東京海洋大学, 学術研究院, 准教授 (00596562)
佐藤根 妃奈  新潟食料農業大学, 食料産業学科, 助教 (60579291)
木谷 洋一郎  金沢大学, 環日本海域環境研究センター, 助教 (70565340)
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: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords水産学 / 生体分子 / テトロドトキシン / 機能性タンパク質 / 生体防御
Outline of Research at the Start

本研究では、フグとカニがもつフグ毒結合タンパク質の構造と機能を解明して、生体防御物質としての役割を明らかにすることを目的とする。すなわち、フグ血漿のpufferfish saxitoxin and tetrodotoxin binding protein (PSTBP)と卵巣のビテロゲニン断片タンパク質ならびにイソガニ体液のフグ毒結合タンパク質を対象として、それらの組換えタンパク質を合成し、タンパク質立体構造を解析して、フグ毒テトロドトキシン(TTX)との結合サイトと結合様式を予測し、フグ毒結合タンパク質のTTX毒性軽減の効果を明らかにする。

Outline of Final Research Achievements

Pufferfish and tetrodotoxin (TTX)-bearing animals resist the administration of TTX, by which they could accumulate high levels of TTX in their body. It is thought that one of the resistance mechanisms against TTX is the occurrence of TTX-binding proteins, decreasing the toxicity of TTX. To examine the biological defense of TTX-bearing animals, we attempted X-ray crystal diffraction analysis of TTX-binding proteins derived from the shore crab Hemigrapsus sunguineus hemolymph and pufferfish plasma. The primary structure of TTX-binding protein from the crab was elucidated, composing three subunits. Subunit 2 with a molecular mass of 65 kDa in the C-terminus region appeared to bind TTX at a molar ratio of 1:1. The recombinant protein was present in the inclusion body and did not crystallize. The recombinant TTX-binding protein (PSTBP 2) from the pufferfish was succeeded in production but not crystallized. PSTBP 2 has a barrel-shaped structure, to which TTX was presumed to be bound.

Academic Significance and Societal Importance of the Research Achievements

フグ毒テトロドトキシン(TTX)に対する生体防御機構の解明に資するため、イソガニ体液およびフグ科魚類血漿中のTTX結合タンパク質の組換えタンパク質を作製し、X線結晶回折を試みた。いずれも結晶化できなかったが、イソガニ体液TTX結合タンパク質の一次構造を決定し、新規タンパク質であることが分かった。作製した組換えタンパク質はTTXとの結合が確認された。フグ血漿TTX結合タンパク質では、立体構造を予測し、TTX結合部位が推測された。現在、フグ毒中毒の効果的な解毒薬がないため、これらTTX結合タンパク質はフグ毒中毒の解毒薬や治療法の開発に貢献できるものと考えられる。

Report

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

    (21 results)

All 2022 2021 2020 2019 Other

All Journal Article (7 results) (of which Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 5 results) Book (1 results) Remarks (4 results)

  • [Journal Article] Tetrodotoxin/Saxitoxins Selectivity of the Euryhaline Freshwater Pufferfish Dichotomyctere fluviatilis2021

    • Author(s)
      Zhu Hongchen、Sakai Towa、Nagashima Yuji、Doi Hiroyuki、Takatani Tomohiro、Arakawa Osamu
    • Journal Title

      Toxins

      Volume: 13 Issue: 10 Pages: 731-731

    • DOI

      10.3390/toxins13100731

    • NAID

      120007180584

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 熊野産ムシフグTakifugu exascurusの毒性2021

    • Author(s)
      辰野竜平、梅枝真人、宮田祐実、出口梨々子、福田翼、古下学、井野靖子、吉川廣幸、高橋洋、長島裕二
    • Journal Title

      食品衛生学雑誌

      Volume: 62 Pages: 28-32

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cloning and tissue distribution of the ATP-binding cassette subfamily G member 2 gene in the marine pufferfish Takifugu rubripes2020

    • Author(s)
      Matsumoto Takuya、Kitajima Saemi、Yamamoto Chisato、Aoyagi Mitsuru、Mitoma Yoshiharu、Harada Hiroyuki、Nagashima Yuji
    • Journal Title

      Fisheries Science

      Volume: 86 Issue: 5 Pages: 873-887

    • DOI

      10.1007/s12562-020-01451-z

    • NAID

      40022347431

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 気候変動とマリントキシン2020

    • Author(s)
      長島裕二、大城直雅
    • Journal Title

      水環境学会誌

      Volume: 43 Pages: 365-369

    • Related Report
      2020 Research-status Report
  • [Journal Article] Evaluation of the tetrodotoxin uptake ability of pufferfish Takifugu rubripes according to age using an in vitro tissue slice incubation method.2020

    • Author(s)
      W. Gao, M. Yamada, R. Ohki, Y. Nagashima, R. Tatsuno, K. Ikeda, K. Kawatsu, T. Takatani, O. Arakawa
    • Journal Title

      Toxicon

      Volume: 174 Pages: 8-12

    • DOI

      10.1016/j.toxicon.2019.11.014

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 地球温暖化によるマリントキシンの拡大とリスク管理2020

    • Author(s)
      長島裕二、大城直雅
    • Journal Title

      JATAFFジャーナル

      Volume: 8 Pages: 40-45

    • Related Report
      2019 Research-status Report
  • [Journal Article] Comamonas sp. 3ah48 a dibenz[a, h] anthracene degrading bacteria that is tolerant to heavy metal.2019

    • Author(s)
      M. Okai, Y. Ohki, S. Yamamoto, M. Takashio, M. Ishida, N. Urano
    • Journal Title

      Lett. Appl. Microbiol.

      Volume: 68 Issue: 6 Pages: 589-596

    • DOI

      10.1111/lam.13158

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 外観からアミメフグと推定されたフグ種のDNA解析2022

    • Author(s)
      西川遼、小山寛喜、石崎松一郎、長島裕二
    • Organizer
      令和4年度日本水産学会春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] マリントキシンについてーフグに関する最近の話題2022

    • Author(s)
      長島裕二
    • Organizer
      第2回食品に関するリスクコミュニケーション公開セミナー
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] イソガニ体液テトロドトキシン結合タンパク質の一次構造2021

    • Author(s)
      長島裕二、藤本健太、石崎松一郎、木谷洋一郎、佐藤根妃奈、岡井公彦
    • Organizer
      令和3年度日本水産学会春季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] フグのフグ毒蓄積メカニズム2021

    • Author(s)
      長島裕二
    • Organizer
      第57回金沢大学環日本海域環境研究センターセミナー
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 実況シンガポール食品庁SFAとのフグセミナー2020

    • Author(s)
      長島裕二
    • Organizer
      第8回国際ふぐ協会セミナー
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Rapid and easy analysis of tetrodotoxin by direct probe ionization/tandem mass spectrometry (DPiMS).2019

    • Author(s)
      T. Murata, K. Ogata, Y. Nagashima
    • Organizer
      67th American Society for Mass Spectrometry Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] フグの毒性に関する最近の話題2019

    • Author(s)
      長島裕二
    • Organizer
      第67回日本海水産物利用担当者会議
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] しらす加工品へのフグ稚魚の混入2019

    • Author(s)
      長島裕二、小宮由希、大木理恵子、横塚峻介、石崎松一郎
    • Organizer
      第115回日本食品衛生学会学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Pufferfish: Toxification mechanism and food safety2019

    • Author(s)
      Y. Nagashima
    • Organizer
      Seminar on pufferfish with Singapore Food Agency
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] 第4章 刺毒魚の毒素タンパク質「水圏生物タンパク質科学の新展開」2020

    • Author(s)
      桐明絢、長島裕二、塩見一雄(尾島孝男、落合芳博編)
    • Total Pages
      334
    • Publisher
      恒星社厚生閣
    • ISBN
      9784769916574
    • Related Report
      2020 Research-status Report
  • [Remarks] 新潟食料農業大学 研究者紹介

    • URL

      https://nafu.ac.jp/faculty/foodindustry-teacher/yuji_nagashima/

    • Related Report
      2020 Research-status Report
  • [Remarks] 東京海洋大学研究者情報

    • URL

      https://olcr.kaiyodai.ac.jp/db/profile.php?yomi=OKAI,Masahiko

    • Related Report
      2020 Research-status Report
  • [Remarks] 金沢大学研究者情報

    • URL

      http://ridb.kanazawa-u.ac.jp/public/detail.php?kaken=70565340

    • Related Report
      2020 Research-status Report 2019 Research-status Report
  • [Remarks] 新潟食料農業大学 研究者紹介

    • URL

      https://nafu.ac.jp/faculty/foodindustry-teacher/hina_satone

    • Related Report
      2020 Research-status Report

URL: 

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

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