Elucidation of the biosynthetic pathways of tetrodotoxin and saxitoxin based on the intermediates
Project/Area Number |
17H03809
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Bioorganic chemistry
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Research Institution | Tohoku University |
Principal Investigator |
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Project Period (FY) |
2017-04-01 – 2020-03-31
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Project Status |
Completed (Fiscal Year 2019)
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Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2019: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2017: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
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Keywords | テトロドトキシン / サキシトキシン / 生合成 / 中間体 / 構造決定 / LC/MS |
Outline of Final Research Achievements |
Seven novel bicyclic guanidino compounds were isolated from the tetrodotoxin (TTX) possessing pufferfish, and their structures were elucidated. These compounds have the same relative stereochemistry as that of TTX. Based on their structures, oxidative biosynthetic pathway towards TTX was suggested. For biosynthesis of saxitoxin (STX), predicted intermediates, 11-hydroxy Int-C’2 and Int-E’were chemically synthesized. They were identified in toxin producing dinoflagellate and cyanobacterium using HR-LC/MS. In addition, a new STX analogue, 12beta-deoxyGTX3 was identified in the toxic cyanobacterium using the standard which was prepared by chemical derivatization.
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Academic Significance and Societal Importance of the Research Achievements |
フグ毒として知られるテトロドトキシン(TTX)は、最もよく知られた生物毒の一つであるが、その生合成機構は解明されていない。最近ではヨーロッパなどで食用の二枚貝などからもTTXが検出され、食品衛生上、その生合成機構を解明することは社会的にも重要である。また、麻痺性貝毒は近年猛威を振るっており、その代表的な毒素であるサキシトキシンの生合成は、世界各地で活発に研究されおり、その特異な三環性の化学構造から、生合成経路の解明は学術的にも注目を集めている。
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Report
(4 results)
Research Products
(95 results)
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[Journal Article] Synthesis of C12-keto saxitoxin derivatives with unusual inhibitory activity against voltage‐gated sodium channels.2020
Author(s)
Adachi, K., Yamada, T., Ishizuka, H., Oki, M., Tsunogae, S., Shimada, N., Chiba, O., Orihara, T., Hidaka, M., Hirokawa, T., Odagi, M., Konoki, K., Yotsu-Yamashita, M., Nagasawa, K.
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Journal Title
Chem. Eur. J.
Volume: 26
Issue: 9
Pages: 2025-2033
DOI
Related Report
Peer Reviewed
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[Journal Article] Metabolomic study of saxitoxin analogues and biosynthetic intermediates in dinoflagellates using 15N-labelled sodium nitrate as a nitrogen source2019
Author(s)
1.Cho, Y., Tsuchiya, S., Omura, T., Koike, K., Oikawa, H., Konoki, K., Oshima, Y., Yotsu-Yamashita, M.
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Journal Title
Sci. Rep.
Volume: 9
Issue: 1
Pages: 3460-3460
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] A novel compound, “FA-1” isolated from Prunus mume, protects human bronchial epithelial cells and keratinocytes from cigarette Smoke extract-induced damage.2018
Author(s)
Andrew J. Jang, Ji-Hyeok Lee, Mari Yotsu-Yamashita, Joodong Park, Steve Kye, Raymond L. Benza, Michael J. Passineau, You-Jin Jeon, Toru Nyunoya.
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Journal Title
Sci. Rep.
Volume: 8
Issue: 1
Pages: 11504-11504
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Pufferfish Saxitoxin and Tetrodotoxin Binding Protein (PSTBP) Analogues in the Blood Plasma of the Pufferfish Arothron nigropunctatus, A. hispidus, A. manilensis, and Chelonodon patoca2018
Author(s)
2.Yotsu-Yamashita, M., Nagaoka, Y., Muramoto, K., Cho, Y., Konoki, K.
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Journal Title
Mar. Drugs
Volume: 16
Issue: 7
Pages: 224-224
DOI
Related Report
Peer Reviewed / Open Access
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[Journal Article] Isolation and structure determination of lysiformine from bacteria associated with marine sponge Halichondria okadai2018
Author(s)
3.Kikuchi, S., Okada, K., Cho, Y., Yoshida, S., Kwon, E., Yotsu-Yamashita, M., *Konoki, K.
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Journal Title
Tetrahedron
Volume: 74
Issue: 27
Pages: 3742-3747
DOI
Related Report
Peer Reviewed
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[Journal Article] Inhibition of veratridine-induced delayed inactivation of the voltage-sensitive sodium channel by synthetic analogs of crambescin B,2017
Author(s)
Tadaaki Tsukamoto, Yukie Chiba, Atsuo Nakazaki, Yuki Ishikawa, Yoshiki Nakane, Yuko Cho, Mari Yotsu-Yamashita, Toshio Nishikawa, Minoru Wakamori, and Keiichi Konoki,*
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Journal Title
Bioorganic & Medicinal Chemistry Letters
Volume: 27
Issue: 5
Pages: 1247-1251
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Presentation] Identification of biosynthetic intermediates of amnesic shellfish toxin domoic acid and anthelmintic compound kainic acid2019
Author(s)
〇Maeno, Y., Kotaki, Y., Terada, R., Cho, Y., Konoki, K. and Yotsu-Yamashita, M.
Organizer
Gordon Research Conference, Mycotoxins and Phycotoxins
Related Report
Int'l Joint Research
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[Presentation] Metabolomic study of saxitoxin biosynthesis in dinoflagellates using 15N-labelled sodium nitrate as a nitrogen source2019
Author(s)
〇Cho, Y., Tsuchiya, S., Omura, T., Koike, K., Oikawa, H., Konoki, K., Oshima, Y. and Yotsu-Yamashita, M.
Organizer
Gordon Research Conference, Mycotoxins and Phycotoxins
Related Report
Int'l Joint Research
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[Presentation] Screening of novel secondary metabolites from microorganisms associated with the marine sponge Halichondria okadai2019
Author(s)
〇Goto, M., Kikuchi, S., Okada, K., Cho, Y., Yotsu-Yamashita, M. and Konoki, K.
Organizer
Tohoku University’s Chemistry Summer School
Related Report
Int'l Joint Research
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[Presentation] Isolation and structural elucidation of tetrodotoxin related compounds from pufferfish2019
Author(s)
〇Yaegashi, Y., Ueyama, N., Kudo, Y., Cho, Y., Konoki, K. and Yotsu-Yamashita, M.
Organizer
Tohoku University’s Chemistry Summer School
Related Report
Int'l Joint Research
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[Presentation] Crisprスクリーニングによる maitotoxin の標的分子探索(2)2019
Author(s)
角替俊輔,Katherine Chan,Amy Hin Yan Tong, Kamaldeep Kaur Aulakh, Andrea Habsid,八代田陽子,Jason Moffat,Charles Boone,山下まり, 村田道雄,〇此木敬一
Organizer
公益社団法人日本農芸化学会東北支部・第154回大会
Related Report
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[Presentation] Crisprスクリーニングによる maitotoxin の標的分子探索(1)2019
Author(s)
〇角替俊輔,Katherine Chan,Amy Hin Yan Tong,Kamaldeep Kaur Aulakh, Andrea Habsid,八代田陽子,Jason Moffat,Charles Boone,山下まり,村田道雄,此木敬一
Organizer
公益社団法人日本農芸化学会東北支部・第154回大会
Related Report
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