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Elucidation of the biosynthetic pathway of terrestrial tetrodotoxin via metagenomic analysis

Research Project

Project/Area Number 20K15405
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 37020:Chemistry and chemical methodology of biomolecules-related
Research InstitutionTohoku University

Principal Investigator

Kudo Yuta  東北大学, 学際科学フロンティア研究所, 助教 (60824662)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywordsテトロドトキシン / イモリ / 生合成 / 構造解析 / メタゲノム / 質量分析 / メタゲノム解析
Outline of Research at the Start

テトロドトキシン (TTX) は、強力な毒性、複雑な分子構造、フグやイモリなど様々な生物に分布するという特徴を持った興味深い化合物である。陸上のTTXの起源(生産者)は不明で、自然界でどのようにTTXが生産されるか(生合成経路)は長年の謎である。本研究では未知の毒生産者の遺伝子の解析と、天然に存在するTTX関連化合物の化学分析の両面からTTXの生合成経路の解明を目指す。

Outline of Final Research Achievements

The biosynthesis of tetrodotoxin (TTX), a potent neurotoxin distributed in pufferfish and newt, has not yet been elucidated. With the aim of elucidating the biosynthetic pathway of TTX in terrestrial organisms, we conducted metagenomic analysis of environmental DNA obtained from the toxic newt habitats, and screening for new TTX-related compounds from toxic newts. New TTX analogues was identified from the toxic newt extract. The structure of the previously reported TTX analogue was revised in this study. We discovered novel cyclic guanidino compounds including two novel skeletal tricyclic compounds. The chemical structures of the obtained compounds provided insight into the biosynthetic/shunt pathways of TTX in terrestrial organisms. The fosmid metagenomic library was prepared from the environmental samples of the toxic newt habitat. PCR screening of possible biosynthetic genes of TTX and sequencing of the library by Next Generation Sequencer were performed.

Academic Significance and Societal Importance of the Research Achievements

最も有名な自然毒の一つで、重要な食中毒原因物質でもあるテトロドトキシン(TTX)の生合成に関する研究を行った。有毒イモリより新たなTTX類縁体を2種同定することができ、さらに既報の成分1種の構造改訂を行った。新規骨格構造を持つ化合物2種を含む新規環状グアニジノ化合物を得て、その構造を詳細に解析した。陸上におけるTTXの推定生合成およびシャント経路において多様な化合物が生成することを示し、新規化合物の構造から生合成経路への新たな知見が得られたことから、学術的・社会的な意義がある。有毒イモリ生息地の環境メタゲノムの塩基配列を解読し、今後、生合成経路の解明に貢献し得るデータが取得できた。

Report

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

    (40 results)

All 2022 2021 2020 Other

All Int'l Joint Research (3 results) Journal Article (6 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (26 results) (of which Int'l Joint Research: 6 results,  Invited: 6 results) Remarks (5 results)

  • [Int'l Joint Research] ユタ州立大学/カリフォルニア大学サンディエゴ校(米国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of California, San Diego/Utah State University(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University of British Columbia/Simon Fraser University(カナダ)

    • Related Report
      2020 Research-status Report
  • [Journal Article] First Identification of 12β-Deoxygonyautoxin 5 (12α-Gonyautoxinol 5) in the Cyanobacterium Dolichospermum circinale (TA04) and 12β-Deoxysaxitoxin (12α-Saxitoxinol) in D. circinale (TA04) and the Dinoflagellate Alexandrium pacificum (Group IV) (120518KureAC)2022

    • Author(s)
      Akamatsu Michiru、Hirozumi Ryosuke、Cho Yuko、Kudo Yuta、Konoki Keiichi、Oshima Yasukatsu、Yotsu-Yamashita Mari
    • Journal Title

      Marine Drugs

      Volume: 20 Issue: 3 Pages: 166-166

    • DOI

      10.3390/md20030166

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Identification of Tricyclic Guanidino Compounds from the Tetrodotoxin-Bearing Newt Taricha granulosa, .2021

    • Author(s)
      Yuta Kudo, Charles T. Hanifin, and Mari Yotsu-Yamashita.
    • Journal Title

      Org. Lett.

      Volume: 23 Issue: 9 Pages: 3513-3517

    • DOI

      10.1021/acs.orglett.1c00916

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Phylogenetic Analysis of the Salinipostin γ-butyrolactone Gene Cluster Uncovers New Potential for Bacterial Signalling-molecule Diversity2021

    • Author(s)
      Kaitlin E. Creamer, Yuta Kudo, Bradley S. Moore, Paul R. Jensen
    • Journal Title

      Microbial Genomics

      Volume: 7 Issue: 5 Pages: 000568-000568

    • DOI

      10.1099/mgen.0.000568

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Two new skeletal analogues of saxitoxin found in the scallop, Patinopecten yessoensis, as possible metabolites of paralytic shellfish toxins2021

    • Author(s)
      Numano Satoshi、Kudo Yuta、Cho Yuko、Konoki Keiichi、Kaga Yoshimasa、Nagasawa Kazuo、Yotsu-Yamashita Mari
    • Journal Title

      Chemosphere

      Volume: 278 Pages: 130224-130224

    • DOI

      10.1016/j.chemosphere.2021.130224

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Structures of N-Hydroxy-Type Tetrodotoxin Analogues and Bicyclic Guanidinium Compounds Found in Toxic Newts2020

    • Author(s)
      Yuta Kudo, Charles T. Hanifin, Yuichi Kotaki, Mari Yotsu-Yamashita*
    • Journal Title

      Journal of Natural Products

      Volume: 83 Issue: 9 Pages: 2706-2717

    • DOI

      10.1021/acs.jnatprod.0c00623

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Expansion of Gamma-Butyrolactone Signaling Molecule Biosynthesis to Phosphotriester Natural Products2020

    • Author(s)
      Kudo Yuta、Awakawa Takayoshi、Du Yi-Ling、Jordan Peter A.、Creamer Kaitlin E.、Jensen Paul R.、Linington Roger G.、Ryan Katherine S.、Moore Bradley S.
    • Journal Title

      ACS Chemical Biology

      Volume: 15 Issue: 12 Pages: 3253-3261

    • DOI

      10.1021/acschembio.0c00824

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 陸上テトロドトキシンの生合成解明を目指した有毒イモリ由来の新規化合物の探索2022

    • Author(s)
      工藤 雄大, 山下 まり
    • Organizer
      日本農芸化学会2022年度大会 大会シンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] テトロドトキシン含有イモリ由来の新規三環性骨格を持つ2種のグアニジノ化合物2022

    • Author(s)
      工藤 雄大, Charles T. Hanifin, 長 由扶子, 此木 敬一, 山下 まり
    • Organizer
      日本農芸化学会2022年度大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Structures of novel analogues and possible biosynthetic intermediates/shunts of tetrodotoxin obtained from toxic newts2022

    • Author(s)
      Yuta Kudo
    • Organizer
      Korea-Japan Joint Workshop on Biofunctional Chemistry
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] フグ毒テトロドトキシンの生合成経路の推定2022

    • Author(s)
      山下 まり, 工藤 雄大, 上山 望, Charles T. Hanifin, 沼野 聡, 長 由扶子, 此木 敬一
    • Organizer
      令和4年度日本水産学会春季大会ミニシンポジウム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 12β-deoxysaxitoxinの藍藻Dolichospermum circinale (TA04) および渦鞭毛藻Alexandrium pacificum (Group IV)からの同定2022

    • Author(s)
      山下 まり, 赤松 みちる, 長 由扶子, 此木 敬一, 工藤 雄大, 大島 泰克
    • Organizer
      令和4年度日本水産学会春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 抗テトロドトキシンモノクローナル抗体の 主要テトロドトキシン類縁体に対する交差反応性評価2022

    • Author(s)
      八巻 慶汰, 佐藤 恭佳, 工藤 雄大, 川津 健太郎, 荒川 修, 高谷 智裕, 長 由扶子, 此木 敬一, 山下 まり
    • Organizer
      日本農芸化学会2022年度大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 異種発現環化酵素を用いた新規カイニン酸類縁体の調製2022

    • Author(s)
      山田 基生, 前野 優香理, 小瀧 裕一, 寺田 竜太, 工藤 雄大, 長 由扶子, 此木 敬一, 山下 まり
    • Organizer
      日本農芸化学会2022年度大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] サキシトキシンの推定生合成中間体の合成と有毒淡水産藍藻における同定2022

    • Author(s)
      袴田 真有, 東海林 千容, 長 由扶子, 安達 栞菜, 石塚 颯, 工藤 雄大, 此木 敬一, 大島 泰克, 長澤 和夫, 山下 まり
    • Organizer
      日本農芸化学会2022年度大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Identification of new analogues and possible biosynthetic shunt products of terrestrial tetrodotoxin aimed at elucidating its biosynthesis2021

    • Author(s)
      Yuta Kudo, Charles Hanifin, Mari Yotsu-Yamashita
    • Organizer
      The 2021 International Chemical Congress of Pacific Basin Societies
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 二次元NMR long range-HSQMBCを用いた構造解析の有用性の検証2021

    • Author(s)
      工藤 雄大, 海原 大輔, Charles T. Hanifin, 長 由扶子, 此木 敬一, 山下 まり
    • Organizer
      第156回 農芸化学会東北支部大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] テトロドトキシン含有サメハダイモリより得られた新規三環性骨格を有するグアニジノ化合物の構造解析2021

    • Author(s)
      工藤 雄大, Charles T. Hanifin, 長 由扶子, 此木 敬一, 山下 まり
    • Organizer
      第63回 天然有機化合物討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Identification of New Analogues and Putative Biosynthetic Intermediates/Shunts of Tetrodotoxin from Toxic Newts2021

    • Author(s)
      Yuta Kudo, Charles T. Hanifin, Yuko Cho, Keiichi Konoki, Mari Yotsu-Yamshita
    • Organizer
      ACS Publications Symposium: The Power of Chemical Transformations
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 新規三環性骨格を有するグアニジノ化合物の構造解析2021

    • Author(s)
      工藤 雄大, Charles T. Hanifin, 山下 まり
    • Organizer
      第32 回万有仙台シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Possible mode of action of polycavernosides, and Nav blocking activities of highly purified tetrodotoxin analogues2021

    • Author(s)
      Mari Yotsu-Yamashita, Yuka Doi, Kotaro, Iwasaki, Satori Sasaki, Yuki Kawashima, Noriko Shimada, Osamu Chiba, Kyoka Sato, Yuta Kudo, Yuko Cho, Keiichi Konoki, Makoto Sasaki
    • Organizer
      The 2021 International Chemical Congress of Pacific Basin Societies
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Prediction of biosynthetic pathway towards tetrodotoxin based on the structures of its natural analogues2021

    • Author(s)
      Mari Yotsu-Yamashita, Yuta Kudo, Yuji Yaegashi, Satoshi Numano, Nozomi Ueyama, Charles Hanifin, Yuko Cho, Keiichi Konoki
    • Organizer
      The 2021 International Chemical Congress of Pacific Basin Societies
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Hemiaminal type saxitoxin analogues found in the scallop, Patinopecten yessoensis2021

    • Author(s)
      Mari Yotsu-Yamashita, Satoshi Numano, Yuta Kudo, Yuko Cho, Keiichi Konoki, Yoshimasa Kaga, Kazuo Nagasawa
    • Organizer
      9th International Conference on Harmful Algae
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] アメリカ産テトロドトキシン含有イモリより得られた新規環状グアニジノ化合物2021

    • Author(s)
      工藤 雄大, Charles T. Hanifin, 山下 まり
    • Organizer
      日本農芸化学会2021年度大会
    • Related Report
      2020 Research-status Report
  • [Presentation] ホタテガイ (Patinopecten yessoensis) 中における麻痺性貝毒代謝物の探索2021

    • Author(s)
      沼野 聡, 工藤 雄大, 長 由扶子, 此木 敬一, 山下 まり
    • Organizer
      日本農芸化学会2021年度大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 「天狗の麦飯」から分離されたクテドノバクテリア(Dictyobacter alpinus Uno16)からの抗菌化合物の探索2021

    • Author(s)
      齋藤 彩菜, 白石 太郎, 葛山 智久, 新谷 尚弘, 工藤 雄大, 山下 まり, 阿部 敬悦, 横田 明, 矢部 修平
    • Organizer
      日本農芸化学会2021年度大会
    • Related Report
      2020 Research-status Report
  • [Presentation] フグ由来の新規テトロドトキシン関連化合物2021

    • Author(s)
      八重樫 優士, 上山 望, 工藤 雄大, 長 由扶子, 此木 敬一, 山下 まり
    • Organizer
      日本農芸化学会2021年度大会
    • Related Report
      2020 Research-status Report
  • [Presentation] テトロドトキシン-タンパク質複合体作製のモデル反応と主生成物の構造決定2021

    • Author(s)
      善 瑞穂, 工藤 雄大, 長 由扶子, 此木 敬一, 山下 まり
    • Organizer
      日本農芸化学会2021年度大会
    • Related Report
      2020 Research-status Report
  • [Presentation] テトロドトキシン類縁体のマウス毒性の再確認およびテトロドトキシンのアルカリ初期分解物の単離と構造2021

    • Author(s)
      山下 まり, 八重樫 優士, 佐藤 恭佳, 杉本 亜津子, 長 由扶子, 此木 敬一, 工藤 雄大
    • Organizer
      令和3年度日本水産学会春季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 有毒イモリより得られた新規テトロドトキシン類縁体および環状グアニジノ化合物2020

    • Author(s)
      工藤 雄大, Charles T. Hanifin, 山下 まり
    • Organizer
      第62回 天然有機化合物討論会
    • Related Report
      2020 Research-status Report
  • [Presentation] 有毒イモリより得られた新規テトロドトキシン類縁体と推定生合成関連化合物の構造2020

    • Author(s)
      工藤 雄大, Charles T. Hanifin, 山下 まり
    • Organizer
      第31 回万有仙台シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] ヒト虫歯菌が生産するテトラミン酸系抗生物質2020

    • Author(s)
      工藤 雄大, Xiaoyu Tang, Jonathon, L. Baker, Anna Edlund, Bradley S. Moore
    • Organizer
      第155回 農芸化学会東北支部大会
    • Related Report
      2020 Research-status Report
  • [Presentation] ホタテガイ中腸腺由来オカダ酸アシル基転移酵素の可溶化条件の検討2020

    • Author(s)
      駒崎 有紀, 寺内 将斗, 工藤 雄大, 長 由扶子, 山下 まり, 此木 敬一
    • Organizer
      第155回 農芸化学会東北支部大会
    • Related Report
      2020 Research-status Report
  • [Remarks] 工藤雄大助教『Organic Letters』誌に論文掲載

    • URL

      http://www.fris.tohoku.ac.jp/feature/topics/detail---id-911.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] 天然物生命化学分野ホームページ

    • URL

      https://www.agri.tohoku.ac.jp/bukka/index-j.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] FRISHP, 工藤雄大 助教 論文掲載およびEditor's Choiceに選出

    • URL

      http://www.fris.tohoku.ac.jp/feature/topics/detail---id-806.html

    • Related Report
      2020 Research-status Report
  • [Remarks] FRISHP, 工藤雄大 助教『ACS Chemical Biology』に論文掲載

    • URL

      http://www.fris.tohoku.ac.jp/feature/topics/detail---id-844.html

    • Related Report
      2020 Research-status Report
  • [Remarks] 東北大学天然物生命化学分野HP

    • URL

      https://www.agri.tohoku.ac.jp/bukka/index-j.html

    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2023-01-30  

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