Elucidation of Late-Stage Biosynthesis of Phomoidride : Proposal of Cyclization Mechanism Affording Characteristic Nine-Membered Ring of Fungal Dimeric Anhydride
Antihypercholesterolemic agent phomoidride (PMD) B has a highly elaborated bicyclo[4.3.1]deca-1,6-diene core scaffold derived from dimeric anhydride with a nine-membered ring. This report elucidated the late stage transformation from an anhydride monomer to PMD B through the heterologous expression of three enzyme genes, TstC, TstK, and TstE. Additional in vitro studies of TstK and TstE provided evidence on the formation of PMD via dimerization, three-step oxidation, and unusual methylation-triggered bicyclic ketal formation. Elucidation of the function of cyclase TstC prompts us to examine the cyclization mechanism of TstC by using a computational approach. Computational analytical data on PMD and structurally related glaucanic acid indicated that the initial decarboxylation of monomer results in enolate and subsequent double Michael reactions of another monomer, followed by an optional aldol reaction proceeding in an endo-selective manner to give cycloadducts, supporting the fact that the starting orientation of two monomers is directly transferred to the product configurations.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:144 |
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| Enthalten in: |
Journal of the American Chemical Society - 144(2022), 46 vom: 23. Nov., Seite 20998-21004 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Yamamoto, Shintaro [VerfasserIn] |
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| Links: |
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| Themen: |
Anhydrides |
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| Anmerkungen: |
Date Completed 24.11.2022 Date Revised 01.12.2022 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1021/jacs.2c09308 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM348876866 |
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| 100 | 1 | |a Yamamoto, Shintaro |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Elucidation of Late-Stage Biosynthesis of Phomoidride |b Proposal of Cyclization Mechanism Affording Characteristic Nine-Membered Ring of Fungal Dimeric Anhydride |
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| 500 | |a Date Completed 24.11.2022 | ||
| 500 | |a Date Revised 01.12.2022 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Antihypercholesterolemic agent phomoidride (PMD) B has a highly elaborated bicyclo[4.3.1]deca-1,6-diene core scaffold derived from dimeric anhydride with a nine-membered ring. This report elucidated the late stage transformation from an anhydride monomer to PMD B through the heterologous expression of three enzyme genes, TstC, TstK, and TstE. Additional in vitro studies of TstK and TstE provided evidence on the formation of PMD via dimerization, three-step oxidation, and unusual methylation-triggered bicyclic ketal formation. Elucidation of the function of cyclase TstC prompts us to examine the cyclization mechanism of TstC by using a computational approach. Computational analytical data on PMD and structurally related glaucanic acid indicated that the initial decarboxylation of monomer results in enolate and subsequent double Michael reactions of another monomer, followed by an optional aldol reaction proceeding in an endo-selective manner to give cycloadducts, supporting the fact that the starting orientation of two monomers is directly transferred to the product configurations | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 7 | |a Anhydrides |2 NLM | |
| 650 | 7 | |a CP 263114 |2 NLM | |
| 650 | 7 | |a Maleic Anhydrides |2 NLM | |
| 700 | 1 | |a Matsuyama, Taro |e verfasserin |4 aut | |
| 700 | 1 | |a Ozaki, Taro |e verfasserin |4 aut | |
| 700 | 1 | |a Takino, Junya |e verfasserin |4 aut | |
| 700 | 1 | |a Sato, Hajime |e verfasserin |4 aut | |
| 700 | 1 | |a Uchiyama, Masanobu |e verfasserin |4 aut | |
| 700 | 1 | |a Minami, Atsushi |e verfasserin |4 aut | |
| 700 | 1 | |a Oikawa, Hideaki |e verfasserin |4 aut | |
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