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Ying Y, Tu S, Ni J, Lu X, Hu X, Lei P, Li X, Wang Y, Jin G, Wang H. Secondary metabolites from Aspergillus terreus F6-3, a marine fungus associated with Johnius belengerii. Fitoterapia 2023; 170:105662. [PMID: 37648028 DOI: 10.1016/j.fitote.2023.105662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/25/2023] [Accepted: 08/27/2023] [Indexed: 09/01/2023]
Abstract
Two new terrein derivatives asperterreinones A-B (1-2), one new octahydrocoumarin derivative (±)-asperterreinin A (6), along with seventeen known compounds, were isolated from Aspergillus terreus F6-3, a marine fungus associated with Johnius belengerii. The structures of 1, 2, and 6 were established on the basis of 1D and 2D NMR, mass spectroscopy, comparative electronic circular dichroism (ECD) spectra analysis, density functional theory calculation of 13C NMR, and DP4+ probability analysis. Among all the isolates, eurylene (7), a constituent of the Malaysian medicinal plant Eurycoma longifolia, was obtained from a microbial source for first time. In the in vitro bioassay, 11 and 13 showed potent inhibitory activity against the Escherichia coli β-glucuronidase (EcGUS) with IC50 values of 27.75 ± 0.73 and 17.73 ± 0.81 μM, respectively. It was the first time that questinol (11) and (±)-aspertertone B (13) were reported as potent EcGUS inhibitors.
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Affiliation(s)
- Youmin Ying
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China.
| | - Shubao Tu
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jiayue Ni
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xuejun Lu
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiaoyan Hu
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Panyi Lei
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xingnuo Li
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China
| | - Ying Wang
- School of Life Science and Technology, China Pharmaceutical University, 211198 Nanjing, China
| | - Guoqian Jin
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Hong Wang
- College of Pharmaceutical Science & Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, China; Key Laboratory of Marine Fishery Resources Exploitment and Utilization of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, China.
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2
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Gribble GW. Naturally Occurring Organohalogen Compounds-A Comprehensive Review. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2023; 121:1-546. [PMID: 37488466 DOI: 10.1007/978-3-031-26629-4_1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The present volume is the third in a trilogy that documents naturally occurring organohalogen compounds, bringing the total number-from fewer than 25 in 1968-to approximately 8000 compounds to date. Nearly all of these natural products contain chlorine or bromine, with a few containing iodine and, fewer still, fluorine. Produced by ubiquitous marine (algae, sponges, corals, bryozoa, nudibranchs, fungi, bacteria) and terrestrial organisms (plants, fungi, bacteria, insects, higher animals) and universal abiotic processes (volcanos, forest fires, geothermal events), organohalogens pervade the global ecosystem. Newly identified extraterrestrial sources are also documented. In addition to chemical structures, biological activity, biohalogenation, biodegradation, natural function, and future outlook are presented.
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Affiliation(s)
- Gordon W Gribble
- Department of Chemistry, Dartmouth College, Hanover, NH, 03755, USA.
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3
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Kahlert L, Bernardi D, Hauser M, Ióca LP, Berlinck RGS, Skellam EJ, Cox RJ. Early Oxidative Transformations During the Biosynthesis of Terrein and Related Natural Products. Chemistry 2021; 27:11895-11903. [PMID: 34114710 PMCID: PMC8453496 DOI: 10.1002/chem.202101447] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Indexed: 01/09/2023]
Abstract
The mycotoxin terrein is derived from the C10‐precursor 6‐hydroxymellein (6‐HM) via an oxidative ring contraction. Although the corresponding biosynthetic gene cluster (BGC) has been identified, details of the enzymatic oxidative transformations are lacking. Combining heterologous expression and in vitro studies we show that the flavin‐dependent monooxygenase (FMO) TerC catalyzes the initial oxidative decarboxylation of 6‐HM. The reactive intermediate is further hydroxylated by the second FMO TerD to yield a highly oxygenated aromatic species, but further reconstitution of the pathway was hampered. A related BGC was identified in the marine‐derived Roussoella sp. DLM33 and confirmed by heterologous expression. These studies demonstrate that the biosynthetic pathways of terrein and related (polychlorinated) congeners diverge after oxidative decarboxylation of the lactone precursor that is catalyzed by a conserved FMO and further indicate that early dehydration of the side chain is an essential step.
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Affiliation(s)
- Lukas Kahlert
- Institute for Organic Chemistry and BMWZ, Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany
| | - Darlon Bernardi
- Institute for Organic Chemistry and BMWZ, Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany.,Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP, 13560-970, São Carlos, SP, Brazil
| | - Maurice Hauser
- Institute for Organic Chemistry and BMWZ, Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany
| | - Laura P Ióca
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP, 13560-970, São Carlos, SP, Brazil
| | - Roberto G S Berlinck
- Instituto de Química de São Carlos, Universidade de São Paulo, CP 780, CEP, 13560-970, São Carlos, SP, Brazil
| | - Elizabeth J Skellam
- Institute for Organic Chemistry and BMWZ, Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany.,Department of Chemistry & BioDiscovery Institute, University of North Texas, 1155 Union Circle 305220, Denton, Texas, 76203, USA
| | - Russell J Cox
- Institute for Organic Chemistry and BMWZ, Leibniz Universität Hannover, Schneiderberg 38, 30167, Hannover, Germany
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4
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Inose K, Tanaka S, Tanaka K, Hashimoto M. Cyclohelminthol CPs: Scope and Limitations of Density Functional Theory-Based Structural Elucidation of Natural Products. J Org Chem 2021; 86:1505-1515. [DOI: 10.1021/acs.joc.0c02378] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Kota Inose
- Faculty of Agriculture and Bioscience, Hirosaki University, 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Shizuya Tanaka
- Faculty of Agriculture and Bioscience, Hirosaki University, 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Kazuaki Tanaka
- Faculty of Agriculture and Bioscience, Hirosaki University, 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Masaru Hashimoto
- Faculty of Agriculture and Bioscience, Hirosaki University, 3-Bunkyo-cho, Hirosaki 036-8561, Japan
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5
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Zhao M, Guo DL, Liu GH, Fu X, Gu YC, Ding LS, Zhou Y. Antifungal Halogenated Cyclopentenones from the Endophytic Fungus Saccharicola bicolor of Bergenia purpurascens by the One Strain-Many Compounds Strategy. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 68:185-192. [PMID: 31815467 DOI: 10.1021/acs.jafc.9b06594] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Min Zhao
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
- Laboratory of Natural Product Drugs, State Key Laboratory of Biotherapy and Cancer Center, West China Medical School, West China Hospital, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Da-Le Guo
- The Ministry of Education Key Laboratory of Standardization of Chinese Herbal Medicine, State Key Laboratory, Breeding Base of Systematic Research Development and Utilization of Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, P. R. China
| | - Guang-Hui Liu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Xian Fu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Yu-Cheng Gu
- Syngenta Jealott’s Hill International Research Centre, Berkshire RG42 6EY, U.K
| | - Li-Sheng Ding
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
| | - Yan Zhou
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P. R. China
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6
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Ugai T, Minami A, Tanaka S, Ozaki T, Liu C, Shigemori H, Hashimoto M, Oikawa H. Biosynthetic Machinery of 6-Hydroxymellein Derivatives Leading to Cyclohelminthols and Palmaenones. Chembiochem 2019; 21:360-367. [PMID: 31298454 DOI: 10.1002/cbic.201900404] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Indexed: 01/04/2023]
Abstract
Oxygenated cyclopentene systems are unique structural motifs found in fungal polyketides such as terrein, cyclohelminthols, and palmaenones. Here we report the identification of the biosynthetic gene clusters for cyclohelminthols and palmaenones and the functional characterization of the polyketide synthases and halogenases involved in the construction of 6-hydroxymellein derivatives. Heterologous expression in Aspergillus oryzae demonstrated that 6-hydroxymellein is a common biosynthetic intermediate and that chlorination occurs in the early stages of its products' biosynthesis. This was further confirmed by in vitro enzymatic reactions conducted in the presence of recombinant proteins. Plausible means of biogenesis of fungal polyketides from 6-hydroxymellein derivatives, additionally supported by the reported labeling patterns of terrein and structurally related fungal polyketides, are also discussed. This study sets the stage for elucidation of the biosynthetic machinery of fungal polyketides of this type.
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Affiliation(s)
- Takahiro Ugai
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Atsushi Minami
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Shizuya Tanaka
- Faculty of Agriculture and Life Science, Hirosaki University, 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Taro Ozaki
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Chengwei Liu
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
| | - Hideyuki Shigemori
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1-Tennodai, Tsukuba, Ibaraki, 305-8572, Japan
| | - Masaru Hashimoto
- Faculty of Agriculture and Life Science, Hirosaki University, 3-Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Hideaki Oikawa
- Department of Chemistry, Faculty of Science, Hokkaido University, Sapporo, 060-0810, Japan
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8
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Tanaka S, Tanaka K, Maeda H, Hashimoto M. Cyclohelminthols Y1-Y4 Metabolites Possessing Two Spirocyclopropanes in Their Structure. J Org Chem 2018; 83:5688-5697. [PMID: 29719958 DOI: 10.1021/acs.joc.8b00727] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cyclohelminthols Y1-Y4 (1-4) were isolated from the culture broth of Helminthosporium velutinum yone96. These compounds are diastereomers to each other featuring 3-azabicyclo[3.1.0]hexane-6-spirocyclopentane linked with a cyclopentanespirocyclopropane framework. Their planar structures were established via the comparison of their spectra with the simpler analogue cyclohelminthol X as well as analysis of their HMBC spectra. Although the proton-deficient core frameworks of 1-4 prevented us from obtaining configurational information via conventional NMR analysis, their total structures involving the relative and absolute configurations were established using density functional theory (DFT)-based molecular modeling calculations. The present study demonstrates the effectiveness of the comparison between the theoretical and experimental δ13C values for stereochemical analysis by focusing on the carbons that show relatively large δ13C deviations among the isomers. The G-ring of these molecules most likely originates from the cyclopropanation of the C6C7 double bond with the carbene equivalent 6 derived from cyclohelminthol IV (7), which was isolated from the same producer fungus. Preliminary biological experiments revealed the potent cytotoxicity of the (6 S)-isomers against COLO201 cells, whereas the (6 R)-isomers exhibited weak activity. The antifungal assay with Cochiobolus miyabeanus showed a slightly different profile.
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Affiliation(s)
- Shizuya Tanaka
- Faculty of Agriculture and Life Science , Hirosaki University , 3-Bunkyo-cho , Hirosaki 036-8561 , Japan
| | - Kazuaki Tanaka
- Faculty of Agriculture and Life Science , Hirosaki University , 3-Bunkyo-cho , Hirosaki 036-8561 , Japan
| | - Hayato Maeda
- Faculty of Agriculture and Life Science , Hirosaki University , 3-Bunkyo-cho , Hirosaki 036-8561 , Japan
| | - Masaru Hashimoto
- Faculty of Agriculture and Life Science , Hirosaki University , 3-Bunkyo-cho , Hirosaki 036-8561 , Japan
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9
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Matsumoto M, Ito A, Tonouchi A, Okazaki M, Hashimoto M. Stereochemical correction and total structure of roridin J. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.07.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Tanaka S, Honmura Y, Uesugi S, Fukushi E, Tanaka K, Maeda H, Kimura KI, Nehira T, Hashimoto M. Cyclohelminthol X, a Hexa-Substituted Spirocyclopropane from Helminthosporium velutinum yone96: Structural Elucidation, Electronic Circular Dichroism Analysis, and Biological Properties. J Org Chem 2017; 82:5574-5582. [PMID: 28467078 DOI: 10.1021/acs.joc.7b00393] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Helminthosporium velutinum yone96 produces cyclohelminthol X (1), a unique hexa-substituted spirocyclopropane. Although its molecular formula and NMR spectral data resemble those of AD0157, being isolated from marine fungus Paraconiothyrium sp. HL-78-gCHSP3-B005, our detailed analyses disclosed a totally different structure. Chemical shift calculations and electronic circular dichroism spectral calculations were quite helpful to establish the structure, when those were performed based on density functional theory. The carbon framework of cyclohelminthols I-IV is found at the C1-C8 propenylcyclopentene substructure of 1. Thus, 1 is assumed to be biosynthesized by cyclopropanation between an oxidized form of cyclohelminthol IV and a succinic anhydride derivative 4. Cytotoxicity for two cancer cell lines and proteasome inhibition efficiency are measured.
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Affiliation(s)
- Shizuya Tanaka
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Yuna Honmura
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Shota Uesugi
- The United Graduate School of Agricultural Sciences, Iwate University , Morioka 020-8550, Japan
| | - Eri Fukushi
- Graduate School of Agriculture, Hokkaido University , Sapporo 060-8589, Japan
| | - Kazuaki Tanaka
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Hayato Maeda
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
| | - Ken-Ichi Kimura
- The United Graduate School of Agricultural Sciences, Iwate University , Morioka 020-8550, Japan
| | - Tatsuo Nehira
- Graduate School of Integrated Arts and Sciences, Hiroshima University , 1-7-1, Kagamiyama, Higashi-Hiroshima 739-8521, Japan
| | - Masaru Hashimoto
- Faculty of Agriculture and Life Science, Hirosaki University , 3-Bunkyo-cho, Hirosaki 036-8561, Japan
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