1
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Cai Y, Lv Y, Shu L, Jin Z, Chi YR, Li T. Access to Axially Chiral Aryl Aldehydes via Carbene-Catalyzed Nitrile Formation and Desymmetrization Reaction. RESEARCH (WASHINGTON, D.C.) 2024; 7:0293. [PMID: 38628355 PMCID: PMC11020146 DOI: 10.34133/research.0293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 12/08/2023] [Indexed: 04/19/2024]
Abstract
An approach utilizing N-heterocyclic carbene for nitrile formation and desymmetrization reaction is developed. The process involves kinetic resolution, with the axially chiral aryl monoaldehydes obtained in moderate yields with excellent optical purities. These axially chiral aryl monoaldehydes can be conveniently transformed into functionalized molecules, showing great potential as catalysts in organic chemistry.
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Affiliation(s)
- Yuanlin Cai
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education,
Guizhou University, Guiyang 550025, China
| | - Ya Lv
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education,
Guizhou University, Guiyang 550025, China
| | - Liangzhen Shu
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education,
Guizhou University, Guiyang 550025, China
| | - Zhichao Jin
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education,
Guizhou University, Guiyang 550025, China
| | - Yonggui Robin Chi
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education,
Guizhou University, Guiyang 550025, China
- School of Chemistry, Chemical Engineering, and Biotechnology,
Nanyang Technological University, Singapore 637371, Singapore
| | - Tingting Li
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education,
Guizhou University, Guiyang 550025, China
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2
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Chávez R, Vaca I, García-Estrada C. Secondary Metabolites Produced by the Blue-Cheese Ripening Mold Penicillium roqueforti; Biosynthesis and Regulation Mechanisms. J Fungi (Basel) 2023; 9:jof9040459. [PMID: 37108913 PMCID: PMC10144355 DOI: 10.3390/jof9040459] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 03/29/2023] [Accepted: 04/06/2023] [Indexed: 04/29/2023] Open
Abstract
Filamentous fungi are an important source of natural products. The mold Penicillium roqueforti, which is well-known for being responsible for the characteristic texture, blue-green spots, and aroma of the so-called blue-veined cheeses (French Bleu, Roquefort, Gorgonzola, Stilton, Cabrales, and Valdeón, among others), is able to synthesize different secondary metabolites, including andrastins and mycophenolic acid, as well as several mycotoxins, such as Roquefortines C and D, PR-toxin and eremofortins, Isofumigaclavines A and B, festuclavine, and Annullatins D and F. This review provides a detailed description of the biosynthetic gene clusters and pathways of the main secondary metabolites produced by P. roqueforti, as well as an overview of the regulatory mechanisms controlling secondary metabolism in this filamentous fungus.
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Affiliation(s)
- Renato Chávez
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Santiago 9170022, Chile
| | - Inmaculada Vaca
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Santiago 7800003, Chile
| | - Carlos García-Estrada
- Departamento de Ciencias Biomédicas, Facultad de Veterinaria, Campus de Vegazana, Universidad de León, 24071 León, Spain
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3
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Xiang P, Kemmerich B, Yang L, Li SM. Biosynthesis of Annullatin D in Penicillium roqueforti Implies Oxidative Lactonization between Two Hydroxyl Groups Catalyzed by a BBE-like Enzyme. Org Lett 2022; 24:6072-6077. [PMID: 35939524 DOI: 10.1021/acs.orglett.2c02438] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Annullatins from Cordyceps annullata are alkylated aromatic polyketides including annullatin D with a fused dihydrobenzofuran lactone ring system. Here, we report the identification of a silent biosynthetic gene cluster for annullatins from Penicillium roqueforti by heterologous expression in Aspergillus nidulans, gene deletion, and feeding experiments as well as by biochemical characterization. The polyketide core structure is consecutively modified by hydroxylation and prenylation. A berberine bridge enzyme-like protein catalyzes the final step, an oxidative lactonization between two hydroxyl groups, to form (2S, 9S)-annullatin D.
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Affiliation(s)
- Pan Xiang
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, Robert-Koch-Straße 4, 35037 Marburg, Germany
| | - Bastian Kemmerich
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, Robert-Koch-Straße 4, 35037 Marburg, Germany
| | - Li Yang
- Haikou Key Laboratory for Research and Utilization of Tropical Natural Products, Institute of Tropical Bioscience and Biotechnology, CATAS, 571101 Haikou, China
| | - Shu-Ming Li
- Institut für Pharmazeutische Biologie und Biotechnologie, Fachbereich Pharmazie, Philipps-Universität Marburg, Robert-Koch-Straße 4, 35037 Marburg, Germany
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4
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Dihydroauroglaucin Isolated from the Mediterranean Sponge Grantia compressa Endophyte Marine Fungus Eurotium chevalieri Inhibits Migration of Human Neuroblastoma Cells. Pharmaceutics 2022; 14:pharmaceutics14030616. [PMID: 35335990 PMCID: PMC8955805 DOI: 10.3390/pharmaceutics14030616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/02/2022] [Accepted: 03/09/2022] [Indexed: 02/01/2023] Open
Abstract
Cancer cell migration is a hallmark of the aggressiveness and progression of malignancies such as high-risk neuroblastoma. Given the lack of effective therapeutic solutions to counteract cancer progression, basic research aims to identify novel bioactive molecules with inhibitory potential on cancer cell migration. In this context, this work investigated the role of members of the salicylaldehyde secondary metabolite set from the sponge endophyte fungus Eurotium chevalieri MUT 2316 as potential inhibitors of human neuroblastoma SH-SY5Y cell migration. Since tetrahydroauroglaucin (TAG) and dihydroauroglaucin (DAG) were isolated in large amounts, both were evaluated for their anticancer properties towards SH-SY5Y cells. Both molecules were found to be non-cytotoxic by MTT assay and cytofluorimetric analysis. Moreover, DAG showed efficacy in inhibiting the highly migratory phenotype of SH-SY5Y cells by wound healing assay; whereas TAG, although structurally similar to DAG, showed no anti-migratory effect. Therefore, this work provides good reasons to conduct further in vitro and in vivo studies focusing on DAG as a potentially useful migrastatic natural marine molecule.
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Zhang FL, Feng T. Diterpenes Specially Produced by Fungi: Structures, Biological Activities, and Biosynthesis (2010–2020). J Fungi (Basel) 2022; 8:jof8030244. [PMID: 35330246 PMCID: PMC8951520 DOI: 10.3390/jof8030244] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/25/2022] [Accepted: 02/27/2022] [Indexed: 12/11/2022] Open
Abstract
Fungi have traditionally been a very rewarding source of biologically active natural products, while diterpenoids from fungi, such as the cyathane-type diterpenoids from Cyathus and Hericium sp., the fusicoccane-type diterpenoids from Fusicoccum and Alternaria sp., the guanacastane-type diterpenoids from Coprinus and Cercospora sp., and the harziene-type diterpenoids from Trichoderma sp., often represent unique carbon skeletons as well as diverse biological functions. The abundances of novel skeletons, biological activities, and biosynthetic pathways present new opportunities for drug discovery, genome mining, and enzymology. In addition, diterpenoids peculiar to fungi also reveal the possibility of differing biological evolution, although they have similar biosynthetic pathways. In this review, we provide an overview about the structures, biological activities, evolution, organic synthesis, and biosynthesis of diterpenoids that have been specially produced by fungi from 2010 to 2020. We hope this review provides timely illumination and beneficial guidance for future research works of scholars who are interested in this area.
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Chen Q, Yuan G, Yuan T, Zeng H, Zou ZR, Tu ZC, Gao J, Zou Y. Set of Cytochrome P450s Cooperatively Catalyzes the Synthesis of a Highly Oxidized and Rearranged Diterpene-Class Sordarinane Architecture. J Am Chem Soc 2022; 144:3580-3589. [PMID: 35170947 DOI: 10.1021/jacs.1c12427] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Cytochrome P450s are one of the most versatile oxidases that catalyze significant and unique chemical transformations for the construction of complex structural frameworks during natural product biosynthesis. Here, we discovered a set of P450s, including SdnB, SdnH, SdnF, and SdnE, that cooperatively catalyzes the reshaping of the inert cycloaraneosene framework to form a highly oxidized and rearranged sordarinane architecture. Among them, SdnB is confirmed to be the first P450 (or oxidase) that cleaves the C-C bond of the epoxy residue to yield formyl groups in pairs. SdnF selectively oxidizes one generated formyl group to a carboxyl group and accelerates the final Diels-Alder cyclization to furnish the sordarinane architecture. Our work greatly enriches the enzyme functions of the P450 superfamily, supplies the missing skills of the P450 synthetic toolbox, and supports them as biocatalysts in further applications toward the synthesis of new chemical entities.
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Affiliation(s)
- Qibin Chen
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Guanyin Yuan
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P. R. China
| | - Tao Yuan
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Huiting Zeng
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Zheng-Rong Zou
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Zong-Cai Tu
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Jie Gao
- College of Life Sciences, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Yi Zou
- College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P. R. China
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7
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Guo X, Chen F, Liu J, Shao Y, Wang X, Zhou Y. Genome Mining and Analysis of PKS Genes in Eurotium cristatum E1 Isolated from Fuzhuan Brick Tea. J Fungi (Basel) 2022; 8:193. [PMID: 35205947 PMCID: PMC8874483 DOI: 10.3390/jof8020193] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/10/2022] [Accepted: 02/10/2022] [Indexed: 12/04/2022] Open
Abstract
Eurotium cristatum as the dominant fungi species of Fuzhuan brick tea in China, can produce multitudinous secondary metabolites (SMs) with various bioactivities. Polyketides are a very important class of SMs found in E. cristatum and have gained extensive attention in recent years due to their remarkable diversity of structures and multiple functions. Therefore, it is necessary to explore the polyketides produced by E. cristatum at the genomic level to enhance its application value. In this paper, 12 polyketide synthase (PKS) genes were found in the whole genome of E. cristatum E1 isolated from Fuzhuan brick tea. In addition, the qRT-PCR results further demonstrated that these genes were expressed. Moreover, metabolic analysis demonstrated E. cristatum E1 can produce a variety of polyketides, including citreorosein, emodin, physcion, isoaspergin, dihydroauroglaucin, iso-dihydroauroglaucin, aspergin, flavoglaucin and auroglaucin. Furthermore, based on genomic analysis, the putative secondary metabolites clusters for emodin and flavoglaucin were proposed. The results reported here will lay a good basis for systematically mining SMs resources of E. cristatum and broadening its application fields.
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Affiliation(s)
- Xiaoxiao Guo
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.G.); (F.C.); (Y.S.)
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Fusheng Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.G.); (F.C.); (Y.S.)
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Jiao Liu
- Institute of Agricultural Quality Standards and Testing Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, China;
- Hubei Key Laboratory of Nutritional Quality and Safety of Agro Products, Wuhan 430064, China
| | - Yanchun Shao
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.G.); (F.C.); (Y.S.)
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiaohong Wang
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; (X.G.); (F.C.); (Y.S.)
- Key Laboratory of Environment Correlative Dietology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Youxiang Zhou
- Institute of Agricultural Quality Standards and Testing Technology Research, Hubei Academy of Agricultural Sciences, Wuhan 430064, China;
- Hubei Key Laboratory of Nutritional Quality and Safety of Agro Products, Wuhan 430064, China
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8
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Luo X, Cai G, Guo Y, Gao C, Huang W, Zhang Z, Lu H, Liu K, Chen J, Xiong X, Lei J, Zhou X, Wang J, Liu Y. Exploring Marine-Derived Ascochlorins as Novel Human Dihydroorotate Dehydrogenase Inhibitors for Treatment of Triple-Negative Breast Cancer. J Med Chem 2021; 64:13918-13932. [PMID: 34516133 DOI: 10.1021/acs.jmedchem.1c01402] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Human dihydroorotate dehydrogenase (hDHODH) is an attractive tumor target essential to de novo pyrimidine biosynthesis. Novel potent hDHODH inhibitors with low toxicity are urgently needed. Herein, we demonstrate the isolation of 25 ascochlorin (ASC) derivatives, including 13 new ones, from the coral-derived fungus Acremonium sclerotigenum, and several of them showed pronounced inhibitions against hDHODH and triple-negative breast cancer (TNBC) cell lines, MDA-MB-231/-468. Interestingly, we found that hDHODH is required for proliferation and survival of TNBC cells, and several ASCs significantly inhibited TNBC cell growth and induced their apoptosis via hDHODH inhibition. Furthermore, the novel and potent hDHODH inhibitors (1 and 21) efficiently suppressed tumor growth in patient-derived TNBC xenograft models without obvious body weight loss or overt toxicity in mice. Collectively, our findings offered a novel lead scaffold as the hDHODH inhibitor for further development of potent anticancer agents and a potential therapeutic strategy for TNBC.
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Affiliation(s)
- Xiaowei Luo
- Institute of Marine Drugs/Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Guodi Cai
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Yinfeng Guo
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Chenghai Gao
- Institute of Marine Drugs/Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Weifeng Huang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Zhenhua Zhang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Humu Lu
- Institute of Marine Drugs/Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Kai Liu
- Institute of Marine Drugs/Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
| | - Jianghe Chen
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Xiaofeng Xiong
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Jinping Lei
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Xuefeng Zhou
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, P.R. China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, P.R. China
| | - Junjian Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P.R. China
| | - Yonghong Liu
- Institute of Marine Drugs/Guangxi Key Laboratory of Marine Drugs, Guangxi University of Chinese Medicine, Nanning 530200, P.R. China
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, P.R. China
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, P.R. China
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9
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Lin LB, Gao YQ, Han R, Xiao J, Wang YM, Zhang Q, Zhai YJ, Han WB, Li WL, Gao JM. Alkylated Salicylaldehydes and Prenylated Indole Alkaloids from the Endolichenic Fungus Aspergillus chevalieri and Their Bioactivities. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:6524-6534. [PMID: 34096711 DOI: 10.1021/acs.jafc.1c01148] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Sixteen metabolites, including seven C7-alkylated salicylaldehyde derivatives (1-7) and nine prenylated indole alkaloids (8-16), three of which are new, namely, asperglaucins A and B (1 and 2) and neoechinulin F (8), were separated from the endolichenic fungus Aspergillus chevalieri SQ-8. Asperglaucin A (1) represents an unusual phthalide-like derivative with a benzo[c]thiophen-1(3H)-one scaffold. All compounds were assessed in vitro for antibacterial, antineuroinflammatory, and antioxidant activities. Notably, asperglaucins A and B exhibited potent antibacterial activities against two plant pathogens Pseudomonas syringae pv actinidae (Psa) and Bacillus cereus, with an MIC value of 6.25 μM; further SEM analyses illustrated that the possible bacteriostatic mechanisms for compounds 1 and 2 were to alter the external structure of B. cereus and Psa, and to cause the rupture or deformation of the cell membranes, respectively, and the results suggest that compounds 1 and 2 may serve as potential promising candidates for lead compounds of agrochemical bactericides. Furthermore, compounds 6 and 10 significantly inhibited nitric oxide production with an IC50 value of ca. 12 μM, and the possible anti-inflammatory mechanisms involved were also studied by molecular docking. Finally, the tested phenolics 3-5 showed significant antioxidative effects. Thus, strain SQ-8 represents a novel resource of these bioactive metabolites to be utilized.
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Affiliation(s)
- Li-Bin Lin
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Yu-Qi Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Rui Han
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Jian Xiao
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Yi-Meng Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Qiang Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Yi-Jie Zhai
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Wen-Bo Han
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Wen-Li Li
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
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10
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Benzoyl ester formation in Aspergillus ustus by hijacking the polyketide acyl intermediates with alcohols. Arch Microbiol 2021; 203:1795-1800. [PMID: 33483795 PMCID: PMC8055633 DOI: 10.1007/s00203-021-02182-0] [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: 12/02/2020] [Revised: 12/21/2020] [Accepted: 01/04/2021] [Indexed: 11/27/2022]
Abstract
Accumulation of two benzoyl esters in Aspergillus ustus after feeding with alcohols was reported 30 years ago. To the best of our knowledge, the biosynthesis for these esters has not been elucidated prior to this study. Here, we demonstrate that these compounds are artifical products of the phenethyl polyketide ustethylin A biosynthestic pathway. In addition, four aditional benzoyl esters with different methylation levels were also isolated and identified as shunt products. Feeding experiments provided evidence that the enzyme-bound polyketide acyl intermediates are hijacked by externally fed MeOH or EtOH, leading to the formation of the benzoyl esters. ![]()
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11
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Zhong W, Chen Y, Wei X, Wang J, Zeng Q, Tian X, Zhang W, Wang F, Zhang S. Euroticins C–E, three pairs of polycyclic salicylaldehyde derivative enantiomers from a marine-derived fungus Eurotium sp. SCSIO F452. Org Chem Front 2021. [DOI: 10.1039/d0qo01519a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Euroticins C–E (1–3) are three pairs of salicylaldehyde derivative enantiomers representing two types of unprecedented highly constructed 6/6/6/6 tetracyclic structures from a marine-derived fungus Eurotium sp. SCSIO F452.
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Affiliation(s)
- Weimao Zhong
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
- Guangdong Key Laboratory of Marine Materia Medica
- RNAM Center for Marine Microbiology
- South China Sea Institute of Oceanology
| | - Yuchan Chen
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Open Laboratory of Applied Microbiology
- Guangdong Institute of Microbiology
- Guangzhou 510070
| | - Xiaoyi Wei
- Key Laboratory of Plant Resources Conservation and Sustainable Utilization
- South China Botanical Garden
- Chinese Academy of Sciences
- Guangzhou 510650
- China
| | - Junfeng Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
- Guangdong Key Laboratory of Marine Materia Medica
- RNAM Center for Marine Microbiology
- South China Sea Institute of Oceanology
| | - Qi Zeng
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
- Guangdong Key Laboratory of Marine Materia Medica
- RNAM Center for Marine Microbiology
- South China Sea Institute of Oceanology
| | - Xinpeng Tian
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
- Guangdong Key Laboratory of Marine Materia Medica
- RNAM Center for Marine Microbiology
- South China Sea Institute of Oceanology
| | - Weimin Zhang
- State Key Laboratory of Applied Microbiology Southern China
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application
- Guangdong Open Laboratory of Applied Microbiology
- Guangdong Institute of Microbiology
- Guangzhou 510070
| | - Fazuo Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
- Guangdong Key Laboratory of Marine Materia Medica
- RNAM Center for Marine Microbiology
- South China Sea Institute of Oceanology
| | - Si Zhang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
- Guangdong Key Laboratory of Marine Materia Medica
- RNAM Center for Marine Microbiology
- South China Sea Institute of Oceanology
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12
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Salicylaldehyde derivatives from a marine-derived fungus Eurotium sp. SCSIO F452. J Antibiot (Tokyo) 2020; 74:273-279. [PMID: 33361799 DOI: 10.1038/s41429-020-00395-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 11/03/2020] [Accepted: 11/18/2020] [Indexed: 01/12/2023]
Abstract
Two pairs of new salicylaldehyde derivative enantiomers, salicylaldehydiums A and B (1 and 2), along with five known analogues were isolated and identified from a marine-derived fungus Eurotium sp. SCSIO F452. Their structures and absolute configuration were determined by extensive spectroscopic analysis and electronic circular dichroism (ECD) calculations. All the new optical pure enantiomers [(+)-1, (-)-1, (+)-2, (-)-2] were evaluated for their cytotoxic and antioxidative activities. Compound (-)-1 exhibited weak cytotoxic activity.
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