1
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Nielsen MR, Sørensen T, Pedersen TB, Westphal KR, Díaz Fernández De Quincoces L, Sondergaard TE, Wimmer R, Brown DW, Sørensen JL. Final piece to the Fusarium pigmentation puzzle - Unraveling of the phenalenone biosynthetic pathway responsible for perithecial pigmentation in the Fusarium solani species complex. Fungal Genet Biol 2024; 174:103912. [PMID: 39004163 DOI: 10.1016/j.fgb.2024.103912] [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: 04/18/2024] [Revised: 06/29/2024] [Accepted: 07/04/2024] [Indexed: 07/16/2024]
Abstract
The Fusarium solani species complex (FSSC) is comprised of important pathogens of plants and humans. A distinctive feature of FSSC species is perithecial pigmentation. While the dark perithecial pigments of other Fusarium species are derived from fusarubins synthesized by polyketide synthase 3 (PKS3), the perithecial pigments of FSSC are derived from an unknown metabolite synthesized by PKS35. Here, we confirm in FSSC species Fusarium vanettenii that PKS35 (fsnI) is required for perithecial pigment synthesis by deletion analysis and that fsnI is closely related to phnA from Penicillium herquei, as well as duxI from Talaromyces stipentatus, which produce prephenalenone as an early intermediate in herqueinone and duclauxin synthesis respectively. The production of prephenalenone by expression of fsnI in Saccharomyces cerevisiae indicates that it is also an early intermediate in perithecial pigment synthesis. We next identified a conserved cluster of 10 genes flanking fsnI in F. vanettenii that when expressed in F. graminearum led to the production of a novel corymbiferan lactone F as a likely end product of the phenalenone biosynthetic pathway in FSSC.
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Affiliation(s)
- Mikkel Rank Nielsen
- Department of Chemistry and Bioscience, Aalborg University, Niels Bohrs Vej 8A, 6700 Esbjerg, Denmark
| | - Trine Sørensen
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Tobias Bruun Pedersen
- Department of Chemistry and Bioscience, Aalborg University, Niels Bohrs Vej 8A, 6700 Esbjerg, Denmark
| | - Klaus Ringsborg Westphal
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | | | - Teis Esben Sondergaard
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Reinhard Wimmer
- Department of Chemistry and Bioscience, Aalborg University, Fredrik Bajers Vej 7H, 9220 Aalborg, Denmark
| | - Daren W Brown
- National Center for Agricultural Utilization Research, U.S. Department of Agriculture, 1815 N University St. Peoria IL 61604, United States of America
| | - Jens Laurids Sørensen
- Department of Chemistry and Bioscience, Aalborg University, Niels Bohrs Vej 8A, 6700 Esbjerg, Denmark.
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2
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Liu Y, Li P, Qi C, Zha Z, Meng J, Liu C, Han J, Zhou Q, Luo Z, Wang J, Zhu H, Ye Y, Chen C, Zhou Y, Zhang Y. Cryptic piperazine derivatives activated by knocking out the global regulator LaeA in Aspergillus flavipes. Bioorg Med Chem 2024; 103:117685. [PMID: 38503009 DOI: 10.1016/j.bmc.2024.117685] [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: 01/18/2024] [Revised: 03/02/2024] [Accepted: 03/13/2024] [Indexed: 03/21/2024]
Abstract
Genome sequencing on an intertidal zone-derived Aspergillus flavipes strain revealed its great potential to produce secondary metabolites. To activate the cryptic compounds of A. flavipes, the global regulator flLaeA was knocked out, leading to substantial up-regulation of the expression of two NRPS-like biosynthetic gene clusters in the ΔflLaeA mutant. With a scaled-up fermentation of the ΔflLaeA strain, five compounds, including two previously undescribed piperazine derivatives flavipamides A and B (1 and 2), along with three known compounds (3-5), were obtained by LC-MS guided isolation. The new compounds were elucidated by spectroscopic analysis and electronic circular dichroism (ECD) calculations, and the biosynthetic pathway was proposed on the bias of bioinformatic analysis and 13C isotope labeling evidence. This is the first report to access cryptic fungi secondary metabolites by inactivating global regulator LaeA and may provide a new approach to discovering new secondary metabolites by such genetic manipulation.
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Affiliation(s)
- Yaping Liu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Pengkun Li
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Changxing Qi
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Ziou Zha
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Jie Meng
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Chang Liu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Jiapei Han
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Qun Zhou
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Zengwei Luo
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Jianping Wang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Hucheng Zhu
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Ying Ye
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China
| | - Chunmei Chen
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China.
| | - Yuan Zhou
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China.
| | - Yonghui Zhang
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, People's Republic of China.
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3
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Wang X, Jarmusch SA, Frisvad JC, Larsen TO. Current status of secondary metabolite pathways linked to their related biosynthetic gene clusters in Aspergillus section Nigri. Nat Prod Rep 2023; 40:237-274. [PMID: 35587705 DOI: 10.1039/d1np00074h] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Covering: up to the end of 2021Aspergilli are biosynthetically 'talented' micro-organisms and therefore the natural products community has continually been interested in the wealth of biosynthetic gene clusters (BGCs) encoding numerous secondary metabolites related to these fungi. With the rapid increase in sequenced fungal genomes combined with the continuous development of bioinformatics tools such as antiSMASH, linking new structures to unknown BGCs has become much easier when taking retro-biosynthetic considerations into account. On the other hand, in most cases it is not as straightforward to prove proposed biosynthetic pathways due to the lack of implemented genetic tools in a given fungal species. As a result, very few secondary metabolite biosynthetic pathways have been characterized even amongst some of the most well studied Aspergillus spp., section Nigri (black aspergilli). This review will cover all known biosynthetic compound families and their structural diversity known from black aspergilli. We have logically divided this into sub-sections describing major biosynthetic classes (polyketides, non-ribosomal peptides, terpenoids, meroterpenoids and hybrid biosynthesis). Importantly, we will focus the review on metabolites which have been firmly linked to their corresponding BGCs.
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Affiliation(s)
- Xinhui Wang
- DTU Bioengineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark.
| | - Scott A Jarmusch
- DTU Bioengineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark.
| | - Jens C Frisvad
- DTU Bioengineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark.
| | - Thomas O Larsen
- DTU Bioengineering, Technical University of Denmark, DK-2800, Kgs. Lyngby, Denmark.
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4
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Cao F, Ma LF, Hu LS, Xu CX, Chen X, Zhan ZJ, Zhao QW, Mao XM. Coordination of Polyketide Release and Multiple Detoxification Pathways for Tolerable Production of Fungal Mycotoxins. Angew Chem Int Ed Engl 2023; 62:e202214814. [PMID: 36461785 DOI: 10.1002/anie.202214814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 12/04/2022]
Abstract
Efficient biosynthesis of microbial bioactive natural products (NPs) is beneficial for the survival of producers, while self-protection is necessary to avoid self-harm resulting from over-accumulation of NPs. The underlying mechanisms for the effective but tolerable production of bioactive NPs are not well understood. Herein, in the biosynthesis of two fungal polyketide mycotoxins aurovertin E (1) and asteltoxin, we show that the cyclases in the gene clusters promote the release of the polyketide backbone, and reveal that a signal peptide is crucial for their subcellular localization and full activity. Meanwhile, the fungus adopts enzymatic acetylation as the major detoxification pathway of 1. If intermediates are over-produced, the non-enzymatic shunt pathways work as salvage pathways to avoid excessive accumulation of the toxic metabolites for self-protection. These findings provided new insight into the interplay of efficient backbone release and multiple detoxification strategies for the production of fungal bioactive NPs.
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Affiliation(s)
- Fei Cao
- Research Center for Clinical Pharmacy, The First Affiliated Hospital & Institute of Pharmaceutical Biotechnology, School of Medicine, Zhejiang University, Hangzhou, 310058, China.,Zhejiang Provincial Key Laboratory for Microbial Biochemistry and Metabolic Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Lie-Feng Ma
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Long-Shuang Hu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Chu-Xuan Xu
- Research Center for Clinical Pharmacy, The First Affiliated Hospital & Institute of Pharmaceutical Biotechnology, School of Medicine, Zhejiang University, Hangzhou, 310058, China.,Zhejiang Provincial Key Laboratory for Microbial Biochemistry and Metabolic Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Xuepeng Chen
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Clinical Research Center for Oral Diseases of Zhejiang Province, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Zha-Jun Zhan
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Qing-Wei Zhao
- Research Center for Clinical Pharmacy, The First Affiliated Hospital & Institute of Pharmaceutical Biotechnology, School of Medicine, Zhejiang University, Hangzhou, 310058, China.,Zhejiang Provincial Key Laboratory for Microbial Biochemistry and Metabolic Engineering, Zhejiang University, Hangzhou, 310058, China
| | - Xu-Ming Mao
- Research Center for Clinical Pharmacy, The First Affiliated Hospital & Institute of Pharmaceutical Biotechnology, School of Medicine, Zhejiang University, Hangzhou, 310058, China.,Zhejiang Provincial Key Laboratory for Microbial Biochemistry and Metabolic Engineering, Zhejiang University, Hangzhou, 310058, China
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5
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Chiang CY, Ohashi M, Tang Y. Deciphering chemical logic of fungal natural product biosynthesis through heterologous expression and genome mining. Nat Prod Rep 2023; 40:89-127. [PMID: 36125308 PMCID: PMC9906657 DOI: 10.1039/d2np00050d] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Covering: 2010 to 2022Heterologous expression of natural product biosynthetic gene clusters (BGCs) has become a widely used tool for genome mining of cryptic pathways, bottom-up investigation of biosynthetic enzymes, and engineered biosynthesis of new natural product variants. In the field of fungal natural products, heterologous expression of a complete pathway was first demonstrated in the biosynthesis of tenellin in Aspergillus oryzae in 2010. Since then, advances in genome sequencing, DNA synthesis, synthetic biology, etc. have led to mining, assignment, and characterization of many fungal BGCs using various heterologous hosts. In this review, we will highlight key examples in the last decade in integrating heterologous expression into genome mining and biosynthetic investigations. The review will cover the choice of heterologous hosts, prioritization of BGCs for structural novelty, and how shunt products from heterologous expression can reveal important insights into the chemical logic of biosynthesis. The review is not meant to be exhaustive but is rather a collection of examples from researchers in the field, including ours, that demonstrates the usefulness and pitfalls of heterologous biosynthesis in fungal natural product discovery.
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Affiliation(s)
- Chen-Yu Chiang
- Dept. of Chemical and Biomolecular Engineering, 5531 Boelter Hall, 420 Westwood Plaza, Los Angeles, CA 90095, USA.
| | - Masao Ohashi
- Dept. of Chemical and Biomolecular Engineering, 5531 Boelter Hall, 420 Westwood Plaza, Los Angeles, CA 90095, USA.
| | - Yi Tang
- Dept. of Chemical and Biomolecular Engineering, 5531 Boelter Hall, 420 Westwood Plaza, Los Angeles, CA 90095, USA.
- Dept. of Chemistry and Biochemistry, 5531 Boelter Hall, 420 Westwood Plaza, Los Angeles, CA 90095, USA
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6
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Zhang T, Pang X, Zhao J, Guo Z, He W, Cai G, Su J, Cen S, Yu L. Discovery and Activation of the Cryptic Cluster from Aspergillus sp. CPCC 400735 for Asperphenalenone Biosynthesis. ACS Chem Biol 2022; 17:1524-1533. [PMID: 35616995 DOI: 10.1021/acschembio.2c00204] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Postgenomic analysis manifested that filamentous fungi contain numerous natural product biosynthetic gene clusters in their genome, yet most clusters remain cryptic or down-regulated. Herein, we report the successful manipulation of strain Aspergillus sp. CPCC 400735 that enables its genetic engineering via targeted overexpression of pathway-specific transcriptional regulator AspE. The down-regulated metabolic pathway encoded by the biosynthetic gene cluster asp was successfully up-activated. Analyses of mutant Ai-OE::aspE extracts led to isolation and characterization of 13 asperphenalenone derivatives, of which 11 of them are new compounds. All of the asperphenalenones exhibited conspicuous anti-influenza A virus effects with IC50 values of 0.45-2.22 μM. Additionally, their identification provided insight into biosynthesis of asperphenalenones and might benefit studies of downstream combinatorial biosynthesis. Our study further demonstrates the effective application of targeted overexpressing pathway-specific activator and novel metabolite discovery in microorganisms. These will accelerate the exploitation of the untapped resources and biosynthetic capability in filamentous fungi.
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Affiliation(s)
- Tao Zhang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Xu Pang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Jianyuan Zhao
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Zhe Guo
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Wenni He
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Guowei Cai
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Jing Su
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Shan Cen
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Liyan Yu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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7
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Sun C, Liu Q, Shah M, Che Q, Zhang G, Zhu T, Zhou J, Rong X, Li D. Talaverrucin A, Heterodimeric Oxaphenalenone from Antarctica Sponge-Derived Fungus Talaromyces sp. HDN151403, Inhibits Wnt/β-Catenin Signaling Pathway. Org Lett 2022; 24:3993-3997. [PMID: 35616425 DOI: 10.1021/acs.orglett.2c01394] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The Wnt/β-catenin signaling pathway is an evolutionarily conserved signaling cascade involved in a broad range of biological roles. Dysregulation of the Wnt/β-catenin pathway is implicated in congenital malformations and various kinds of cancers. We discovered a novel Wnt/β-catenin inhibitor, talaverrucin A (1), featuring an unprecedented 6/6/6/5/5/5/6 fused ring system, from an Antarctica sponge-derived fungus Talaromyces sp. HDN151403. Talaverrucin A exhibits inhibitory activity on the Wnt/β-catenin pathway in both zebrafish embryos in vivo and cultured mammalian cells in vitro, providing a naturally inspired small molecule therapeutic lead to target the Wnt/β-catenin pathway.
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Affiliation(s)
- Chunxiao Sun
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China
| | - Qianwen Liu
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China
| | - Mudassir Shah
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China
| | - Qian Che
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China
| | - Guojian Zhang
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China.,Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266071, China.,Marine Biomedical Research Institute of Qingdao, Qingdao 266101, China
| | - Tianjiao Zhu
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China
| | - Jianfeng Zhou
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China.,Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Xiaozhi Rong
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China.,Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Dehai Li
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China.,Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology, Qingdao 266071, China
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8
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Shahid H, Cai T, Wang Y, Zheng C, Yang Y, Mao Z, Ding P, Shan T. Duclauxin Derivatives From Fungi and Their Biological Activities. Front Microbiol 2021; 12:766440. [PMID: 35003004 PMCID: PMC8727740 DOI: 10.3389/fmicb.2021.766440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 12/06/2021] [Indexed: 11/20/2022] Open
Abstract
Duclauxin is a heptacyclic oligophenalenone dimer consisting of an isocoumarin and a dihydroisocoumarin unit. These two tricyclic moieties are joined by a cyclopentane ring to form a unique hinge or castanets-like structure. Duclauxin is effective against numerous tumor cell lines because it prevents adenosine triphosphate (ATP) synthesis by inhibiting mitochondrial respiration. There are about 36 reported natural duclauxin analogs mainly produced by 9 Penicillium and Talaromyces species (T. duclauxii, T. aculeatus, T. stipitatus, T. bacillisporus, T. verruculosus, T. macrosporus, P. herquei, P. manginii, and Talaromyces sp.). These metabolites exhibit remarkable biological activities, including antitumor, enzyme inhibition, and antimicrobial, showing tremendous potential in agricultural and medical applications. This review highlights the chemical structures and biological activities of fungal duclauxins, together with biosynthesis, absolute configuration, and mode of action for important duclauxins. Furthermore, phylogenetic analysis and correct names of Penicillium and Talaromyces species producing duclauxins are presented in this review.
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Affiliation(s)
- Hamza Shahid
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Teng Cai
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Yuyang Wang
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Caiqing Zheng
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Yuting Yang
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Ziling Mao
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Ping Ding
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Tijiang Shan
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
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9
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Little RF, Hertweck C. Chain release mechanisms in polyketide and non-ribosomal peptide biosynthesis. Nat Prod Rep 2021; 39:163-205. [PMID: 34622896 DOI: 10.1039/d1np00035g] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Review covering up to mid-2021The structure of polyketide and non-ribosomal peptide natural products is strongly influenced by how they are released from their biosynthetic enzymes. As such, Nature has evolved a diverse range of release mechanisms, leading to the formation of bioactive chemical scaffolds such as lactones, lactams, diketopiperazines, and tetronates. Here, we review the enzymes and mechanisms used for chain release in polyketide and non-ribosomal peptide biosynthesis, how these mechanisms affect natural product structure, and how they could be utilised to introduce structural diversity into the products of engineered biosynthetic pathways.
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Affiliation(s)
- Rory F Little
- Leibniz Institute for Natural Product Research and Infection Biology, HKI, Germany.
| | - Christian Hertweck
- Leibniz Institute for Natural Product Research and Infection Biology, HKI, Germany.
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10
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Adrover-Castellano ML, Schmidt JJ, Sherman DH. Biosynthetic Cyclization Catalysts for the Assembly of Peptide and Polyketide Natural Products. ChemCatChem 2021; 13:2095-2116. [PMID: 34335987 PMCID: PMC8320681 DOI: 10.1002/cctc.202001886] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Indexed: 12/13/2022]
Abstract
Many biologically active natural products are synthesized by nonribosomal peptide synthetases (NRPSs), polyketide synthases (PKSs) and their hybrids. These megasynthetases contain modules possessing distinct catalytic domains that allow for substrate initiation, chain extension, processing and termination. At the end of a module, a terminal domain, usually a thioesterase (TE), is responsible for catalyzing the release of the NRPS or PKS as a linear or cyclized product. In this review, we address the general cyclization mechanism of the TE domain, including oligomerization and the fungal C-C bond forming Claisen-like cyclases (CLCs). Additionally, we include examples of cyclization catalysts acting within or at the end of a module. Furthermore, condensation-like (CT) domains, terminal reductase (R) domains, reductase-like domains that catalyze Dieckmann condensation (RD), thioesterase-like Dieckmann cyclases, trans-acting TEs from the penicillin binding protein (PBP) enzyme family, product template (PT) domains and others will also be reviewed. The studies summarized here highlight the remarkable diversity of NRPS and PKS cyclization catalysts for the production of biologically relevant, complex cyclic natural products and related compounds.
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Affiliation(s)
| | - Jennifer J Schmidt
- Life Sciences Institute, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109-2216 (USA)
| | - David H Sherman
- Life Sciences Institute, University of Michigan, 210 Washtenaw Avenue, Ann Arbor, MI 48109-2216 (USA)
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11
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A [6+4]-cycloaddition adduct is the biosynthetic intermediate in streptoseomycin biosynthesis. Nat Commun 2021; 12:2092. [PMID: 33828077 PMCID: PMC8027225 DOI: 10.1038/s41467-021-22395-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 03/10/2021] [Indexed: 12/14/2022] Open
Abstract
Streptoseomycin (STM, 1) is a bacterial macrolactone that has a unique 5/14/10/6/6-pentacyclic ring with an ether bridge. We have previously identified the biosynthetic gene cluster for 1 and characterized StmD as [6 + 4]- and [4 + 2]-bispericyclase that catalyze a reaction leading to both 6/10/6- and 10/6/6-tricyclic adducts (6 and 7). The remaining steps, especially how to install and stabilize the required 10/6/6-tricyclic core for downstream modifications, remain unknown. In this work, we have identified three oxidoreductases that fix the required 10/6/6-tryciclic core. A pair of flavin-dependent oxidoreductases, StmO1 and StmO2, catalyze the direct hydroxylation at [6 + 4]-adduct (6). Subsequently, a spontaneous [3,3]-Cope rearrangement and an enol-ketone tautomerization result in the formation of 10/6/6-tricyclic intermediate 12b, which can be further converted to a stable 10/6/6-tricyclic alcohol 11 through a ketoreduction by StmK. Crystal structure of the heterodimeric complex NtfO1-NtfO2, homologues of StmO1-StmO2 with equivalent function, reveals protein-protein interactions. Our results demonstrate that the [6 + 4]-adduct instead of [4 + 2]-adduct is the bona fide biosynthetic intermediate.
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12
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Reis RAG, Li H, Johnson M, Sobrado P. New frontiers in flavin-dependent monooxygenases. Arch Biochem Biophys 2021; 699:108765. [PMID: 33460580 DOI: 10.1016/j.abb.2021.108765] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 12/15/2022]
Abstract
Flavin-dependent monooxygenases catalyze a wide variety of redox reactions in important biological processes and are responsible for the synthesis of highly complex natural products. Although much has been learned about FMO chemistry in the last ~80 years of research, several aspects of the reactions catalyzed by these enzymes remain unknown. In this review, we summarize recent advancements in the flavin-dependent monooxygenase field including aspects of flavin dynamics, formation and stabilization of reactive species, and the hydroxylation mechanism. Novel catalysis of flavin-dependent N-oxidases involving consecutive oxidations of amines to generate oximes or nitrones is presented and the biological relevance of the products is discussed. In addition, the activity of some FMOs have been shown to be essential for the virulence of several human pathogens. We also discuss the biomedical relevance of FMOs in antibiotic resistance and the efforts to identify inhibitors against some members of this important and growing family enzymes.
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Affiliation(s)
| | - Hao Li
- Department of Biochemistry, Blacksburg, VA, 24061, USA
| | - Maxim Johnson
- Department of Biochemistry, Blacksburg, VA, 24061, USA
| | - Pablo Sobrado
- Department of Biochemistry, Blacksburg, VA, 24061, USA; Center for Drug Discovery, Virginia Tech, Blacksburg, VA, 24061, USA.
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13
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Kiyotaki K, Kayukawa T, Imayoshi A, Tsubaki K. Total Syntheses of FR-901235, Auxarthrones A-D, and Lamellicolic Anhydride. Org Lett 2020; 22:9220-9224. [PMID: 33196202 DOI: 10.1021/acs.orglett.0c03401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In our previous study, an unusual rearrangement reaction was discovered whereby dinaphthyl ketones with three hydroxy groups at restricted positions were transformed into a phenalenone ring and a benzene ring. Using the rearrangement as a key reaction, the first total syntheses of FR-901235 and auxarthrones A-D from an unstable triketone common intermediate are described. Furthermore, lamellicolic anhydride was synthesized from the triketone. This conversion is part of the putative biosynthetic pathway and was achieved experimentally for the first time.
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Affiliation(s)
- Kotaro Kiyotaki
- Graduate School for Life and Environmental Sciences, Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522 Japan
| | - Takuto Kayukawa
- Graduate School for Life and Environmental Sciences, Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522 Japan
| | - Ayumi Imayoshi
- Graduate School for Life and Environmental Sciences, Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522 Japan
| | - Kazunori Tsubaki
- Graduate School for Life and Environmental Sciences, Kyoto Prefectural University 1-5 Shimogamo Hangi-cho, Sakyo-ku, Kyoto 606-8522 Japan
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14
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Hüttel W, Müller M. Regio- and stereoselective intermolecular phenol coupling enzymes in secondary metabolite biosynthesis. Nat Prod Rep 2020; 38:1011-1043. [PMID: 33196733 DOI: 10.1039/d0np00010h] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Covering: 2005 to 2020Phenol coupling is a key reaction in the biosynthesis of important biopolymers such as lignin and melanin and of a plethora of biarylic secondary metabolites. The reaction usually leads to several different regioisomeric products due to the delocalization of a radical in the reaction intermediates. If axial chirality is involved, stereoisomeric products are obtained provided no external factor influences the selectivity. Hence, in non-enzymatic organic synthesis it is notoriously difficult to control the selectivity of the reaction, in particular if the coupling is intermolecular. From biosynthesis, it is known that especially fungi, plants, and bacteria produce biarylic compounds regio- and stereoselectively. Nonetheless, the involved enzymes long evaded discovery. First progress was made in the late 1990s; however, the breakthrough came only with the genomic era and, in particular, in the last few years the number of relevant publications has dramatically increased. The discoveries reviewed in this article reveal a remarkable diversity of enzymes that catalyze oxidative intermolecular phenol coupling, including various classes of laccases, cytochrome P450 enzymes, and heme peroxidases. Particularly in the case of laccases, the catalytic systems are often complex and additional proteins, substrates, or reaction conditions have a strong influence on activity and regio- and atroposelectivity. Although the field of (selective) enzymatic phenol coupling is still in its infancy, the diversity of enzymes identified recently could make it easier to select suitable candidates for biotechnological development and to approach this challenging reaction through biocatalysis.
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Affiliation(s)
- Wolfgang Hüttel
- Institute of Pharmaceutical Sciences, Albert-Ludwigs-Universität Freiburg, Albertstrasse 25, 79104 Freiburg, Germany.
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15
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Chaudhary NK, Crombie A, Vuong D, Lacey E, Piggott AM, Karuso P. Talauxins: Hybrid Phenalenone Dimers from Talaromyces stipitatus. JOURNAL OF NATURAL PRODUCTS 2020; 83:1051-1060. [PMID: 32119543 DOI: 10.1021/acs.jnatprod.9b01066] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cultivation and extraction of the fungus Talaromyces stipitatus led to the isolation of five new oxyphenalenone-amino acid hybrids, which were named talauxins E, Q, V, L, and I based on the corresponding one-letter amino acid codes, along with their putative biosynthetic precursor, duclauxin. The rapid reaction of duclauxin with amino acids to produce talauxins was demonstrated in vitro and exploited to generate a small library of natural and unnatural talauxins. Talauxin V was shown to undergo spontaneous elimination of methyl acetate to yield the corresponding neoclauxin scaffold. This process was modeled using density functional theory calculations, revealing a dramatic change in conformation resulting from the syn elimination of methyl acetate.
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Affiliation(s)
- Nirmal K Chaudhary
- Department of Molecular Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Andrew Crombie
- Microbial Screening Technologies Pty. Ltd., Smithfield, NSW 2164, Australia
| | - Daniel Vuong
- Microbial Screening Technologies Pty. Ltd., Smithfield, NSW 2164, Australia
| | - Ernest Lacey
- Department of Molecular Sciences, Macquarie University, Sydney, NSW 2109, Australia
- Microbial Screening Technologies Pty. Ltd., Smithfield, NSW 2164, Australia
| | - Andrew M Piggott
- Department of Molecular Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Peter Karuso
- Department of Molecular Sciences, Macquarie University, Sydney, NSW 2109, Australia
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Zhang X, Tan X, Li Y, Wang Y, Yu M, Qing J, Sun B, Niu S, Ding G. Hispidulones A and B, two new phenalenone analogs from desert plant endophytic fungus Chaetosphaeronema hispidulum. J Antibiot (Tokyo) 2019; 73:56-59. [PMID: 31624336 DOI: 10.1038/s41429-019-0247-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 08/26/2019] [Accepted: 08/27/2019] [Indexed: 01/18/2023]
Abstract
Two new phenalenone analogs hispidulones A (1) and B (2) were isolated from the specially bioenvironmental desert plant endophytic fungus Chaetosphaeronema hispidulum. The structure of these two compounds were elucidated by extensive spectra analysis including HR-ESI-MS, NMR (1H, 13C, 1H-1H COSY, HSQC, and HMBC), CD, and electronic circular dichroism (ECD) combined with quantum-chemical calculations adopting time-dependent density functional theory (TDDFT) approaches. The W long-ranged 1H-1H COSY and HMBC correlations are very important in the structural elucidation of these two compounds. Hispidulone A (1) possesses a cyclohexa-2,5-dien-1-one moiety, whereas hispidulone B (2) contains a hemiacetal OCH3 group, which are very rare in the structures of phenalenone analogs. According to structural features of these two compounds together considering the literature, the possible biosynthetic pathway of 1 and 2 was postulated. Hispidulone B (2) displayed cytotoxic activities against three cancer cell lines A549, Huh7, and HeLa with IC50 values of 2.71 ± 0.08, 22.93 ± 1.61, and 23.94 ± 0.33 μM.
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Affiliation(s)
- Xiaoyan Zhang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 100193, Beijing, China
| | - Xiangmei Tan
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 100193, Beijing, China
| | - Yuanyuan Li
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 100193, Beijing, China
| | - Yanduo Wang
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 100193, Beijing, China
| | - Meng Yu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 100193, Beijing, China
| | - Jianchun Qing
- College of Plant Sciences, Jilin University, 130062, Changchun, China
| | - Bingda Sun
- Institute of Microbiology, Chinese Academy of Sciences, 100090, Beijing, China
| | - Shubin Niu
- School of Biological Medicine, Beijing City University, 100083, Beijing, China
| | - Gang Ding
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, 100193, Beijing, China.
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Identification of a Polyketide Synthase Gene Responsible for Ascochitine Biosynthesis in Ascochyta fabae and Its Abrogation in Sister Taxa. mSphere 2019; 4:4/5/e00622-19. [PMID: 31554725 PMCID: PMC6763771 DOI: 10.1128/msphere.00622-19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Fungi produce a diverse array of secondary metabolites, many of which are of pharmacological importance whereas many others are noted for mycotoxins, such as aflatoxin and citrinin, that can threaten human and animal health. The polyketide-derived compound ascochitine, which is structurally similar to citrinin mycotoxin, has been considered to be important for pathogenicity of legume-associated Ascochyta species. Here, we identified the ascochitine polyketide synthase (PKS) gene in Ascochyta fabae and its neighboring genes that may be involved in ascochitine biosynthesis. Interestingly, the ascochitine PKS genes in other legume-associated Ascochyta species have been mutated, encoding truncated PKSs. This indicated that point mutations may have contributed to genetic diversity for secondary metabolite production in these fungi. We also demonstrated that ascochitine is not a pathogenicity factor in A. fabae. The antifungal activities and production of ascochitine during sporulation suggested that it may play a role in competition with other saprobic fungi in nature. The polyketide-derived secondary metabolite ascochitine is produced by species in the Didymellaceae family, including but not restricted to Ascochyta species pathogens of cool-season food legumes. Ascochitine is structurally similar to the well-known mycotoxin citrinin and exhibits broad-spectrum phytotoxicity and antimicrobial activities. Here, we identified a polyketide synthase (PKS) gene (denoted pksAC) responsible for ascochitine production in the filamentous fungus Ascochyta fabae. Deletion of the pksAC prevented production of ascochitine and its derivative ascochital in A. fabae. The putative ascochitine biosynthesis gene cluster comprises 11 genes that have undergone rearrangement and gain-and-loss events relative to the citrinin biosynthesis gene cluster in Monascus ruber. Interestingly, we also identified pksAC homologs in two recently diverged species, A. lentis and A. lentis var. lathyri, that are sister taxa closely related to ascochitine producers such as A. fabae and A. viciae-villosae. However, nonsense mutations have been independently introduced in coding sequences of the pksAC homologs of A. lentis and A. lentis var. lathyri that resulted in loss of ascochitine production. Despite its reported phytotoxicity, ascochitine was not a pathogenicity factor in A. fabae infection and colonization of faba bean (Vicia faba L.). Ascochitine was mainly produced from mature hyphae at the site of pycnidial formation, suggesting a possible protective role of the compound against other microbial competitors in nature. This report highlights the evolution of gene clusters harnessing the structural diversity of polyketides and a mechanism with the potential to alter secondary metabolite profiles via single nucleotide polymorphisms in closely related fungal species. IMPORTANCE Fungi produce a diverse array of secondary metabolites, many of which are of pharmacological importance whereas many others are noted for mycotoxins, such as aflatoxin and citrinin, that can threaten human and animal health. The polyketide-derived compound ascochitine, which is structurally similar to citrinin mycotoxin, has been considered to be important for pathogenicity of legume-associated Ascochyta species. Here, we identified the ascochitine polyketide synthase (PKS) gene in Ascochyta fabae and its neighboring genes that may be involved in ascochitine biosynthesis. Interestingly, the ascochitine PKS genes in other legume-associated Ascochyta species have been mutated, encoding truncated PKSs. This indicated that point mutations may have contributed to genetic diversity for secondary metabolite production in these fungi. We also demonstrated that ascochitine is not a pathogenicity factor in A. fabae. The antifungal activities and production of ascochitine during sporulation suggested that it may play a role in competition with other saprobic fungi in nature.
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18
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Kim W, Cavinder B, Proctor RH, O'Donnell K, Townsend JP, Trail F. Comparative Genomics and Transcriptomics During Sexual Development Gives Insight Into the Life History of the Cosmopolitan Fungus Fusarium neocosmosporiellum. Front Microbiol 2019; 10:1247. [PMID: 31231336 PMCID: PMC6568001 DOI: 10.3389/fmicb.2019.01247] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 05/20/2019] [Indexed: 12/17/2022] Open
Abstract
Fusarium neocosmosporiellum (formerly Neocosmospora vasinfecta) is a cosmopolitan fungus that has been reported from soil, herbivore dung, and as a fruit- and root-rot pathogen of numerous field crops, although it is not known to cause significant losses on any crop. Taking advantage of the fact that this species produces prolific numbers of perithecia in culture, the genome of F. neocosmosporiellum was sequenced and transcriptomic analysis across five stages of perithecium development was performed to better understand the metabolic potential for sexual development and gain insight into its life history. Perithecium morphology together with the genome and transcriptome were compared with those of the plant pathogen F. graminearum, a model for studying perithecium development. Larger ascospores of F. neocosmosporiellum and their tendency to discharge as a cluster demonstrated a duality of dispersal: the majority are passively dispersed through the formation of cirrhi, while a minority of spores are shot longer distances than those of F. graminearum. The predicted gene number in the F. neocosmosporiellum genome was similar to that in F. graminearum, but F. neocosmosporiellum had more carbohydrate metabolism-related and transmembrane transport genes. Many transporter genes were differentially expressed during perithecium development in F. neocosmosporiellum, which may account for its larger perithecia. Comparative analysis of the secondary metabolite gene clusters identified several polyketide synthase genes that were induced during later stages of perithecium development. Deletion of a polyketide synthase gene in F. neocosmosporiellum resulted in a defective perithecium phenotype, suggesting an important role of the corresponding metabolite, which has yet to be identified, in perithecium development. Results of this study have provided novel insights into the genomic underpinning of development in F. neocosmosporiellum, which may help elucidate its ability to occupy diverse ecological niches.
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Affiliation(s)
- Wonyong Kim
- Department of Plant Biology, Michigan State University, East Lansing, MI, United States
| | - Brad Cavinder
- Department of Plant Biology, Michigan State University, East Lansing, MI, United States
| | - Robert H Proctor
- Mycotoxin Prevention and Applied Microbiology Research Unit, United States Department of Agriculture, Peoria, IL, United States
| | - Kerry O'Donnell
- Mycotoxin Prevention and Applied Microbiology Research Unit, United States Department of Agriculture, Peoria, IL, United States
| | - Jeffrey P Townsend
- Department of Biostatistics, Yale University, New Haven, CT, United States.,Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, United States
| | - Frances Trail
- Department of Plant Biology, Michigan State University, East Lansing, MI, United States.,Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, United States
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19
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Wang B, Li X, Yu D, Chen X, Tabudravu J, Deng H, Pan L. Deletion of the epigenetic regulator GcnE in Aspergillus niger FGSC A1279 activates the production of multiple polyketide metabolites. Microbiol Res 2018; 217:101-107. [DOI: 10.1016/j.micres.2018.10.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 09/22/2018] [Accepted: 10/13/2018] [Indexed: 10/28/2022]
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20
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Gao SS, Zhang T, Garcia-Borràs M, Hung YS, Billingsley JM, Houk KN, Hu Y, Tang Y. Biosynthesis of Heptacyclic Duclauxins Requires Extensive Redox Modifications of the Phenalenone Aromatic Polyketide. J Am Chem Soc 2018; 140:6991-6997. [PMID: 29741874 DOI: 10.1021/jacs.8b03705] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Duclauxins are dimeric and heptacyclic fungal polyketides with notable bioactivities. We characterized the cascade of redox transformations in the biosynthetic pathway of duclauxin from Talaromyces stipitatus. The redox reaction sequence is initiated by a cupin family dioxygenase DuxM that performs an oxidative cleavage of the peri-fused tricyclic phenalenone and affords a transient hemiketal-oxaphenalenone intermediate. Additional redox enzymes then morph the oxaphenoalenone into either an anhydride or a dihydrocoumarin-containing monomeric building block that is found in dimeric duxlauxins. Oxidative coupling between the monomers to form the initial C-C bond was shown to be catalyzed by a P450 monooxygenase, although the enzyme responsible for the second C-C bond formation was not found in the pathway. Collectively, the number and variety of redox enzymes used in the duclauxin pathway showcase Nature's strategy to generate structural complexity during natural product biosynthesis.
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Affiliation(s)
| | - Tao Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing 100050 , China
| | | | | | | | | | - Youcai Hu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing 100050 , China
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21
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Harvey CJB, Tang M, Schlecht U, Horecka J, Fischer CR, Lin HC, Li J, Naughton B, Cherry J, Miranda M, Li YF, Chu AM, Hennessy JR, Vandova GA, Inglis D, Aiyar RS, Steinmetz LM, Davis RW, Medema MH, Sattely E, Khosla C, St. Onge RP, Tang Y, Hillenmeyer ME. HEx: A heterologous expression platform for the discovery of fungal natural products. SCIENCE ADVANCES 2018; 4:eaar5459. [PMID: 29651464 PMCID: PMC5895447 DOI: 10.1126/sciadv.aar5459] [Citation(s) in RCA: 132] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 02/26/2018] [Indexed: 05/18/2023]
Abstract
For decades, fungi have been a source of U.S. Food and Drug Administration-approved natural products such as penicillin, cyclosporine, and the statins. Recent breakthroughs in DNA sequencing suggest that millions of fungal species exist on Earth, with each genome encoding pathways capable of generating as many as dozens of natural products. However, the majority of encoded molecules are difficult or impossible to access because the organisms are uncultivable or the genes are transcriptionally silent. To overcome this bottleneck in natural product discovery, we developed the HEx (Heterologous EXpression) synthetic biology platform for rapid, scalable expression of fungal biosynthetic genes and their encoded metabolites in Saccharomyces cerevisiae. We applied this platform to 41 fungal biosynthetic gene clusters from diverse fungal species from around the world, 22 of which produced detectable compounds. These included novel compounds with unexpected biosynthetic origins, particularly from poorly studied species. This result establishes the HEx platform for rapid discovery of natural products from any fungal species, even those that are uncultivable, and opens the door to discovery of the next generation of natural products.
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Affiliation(s)
- Colin J. B. Harvey
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Mancheng Tang
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
| | - Ulrich Schlecht
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Joe Horecka
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Curt R. Fischer
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
- Stanford ChEM-H (Chemistry, Engineering and Medicine for Human Health), Stanford University, Palo Alto, CA 94304, USA
| | - Hsiao-Ching Lin
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
| | - Jian Li
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Brian Naughton
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - James Cherry
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Molly Miranda
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Yong Fuga Li
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Angela M. Chu
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - James R. Hennessy
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Gergana A. Vandova
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Diane Inglis
- Department of Genetics, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Raeka S. Aiyar
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Lars M. Steinmetz
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
- Department of Genetics, Stanford University School of Medicine, Palo Alto, CA 94304, USA
- European Molecular Biology Laboratory Heidelberg, 69117 Heidelberg, Germany
| | - Ronald W. Davis
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
- Department of Genetics, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Marnix H. Medema
- Bioinformatics Group, Wageningen University, Wageningen, Netherlands
| | - Elizabeth Sattely
- Department of Chemical Engineering, Stanford University, Palo Alto, CA 94304, USA
| | - Chaitan Khosla
- Stanford ChEM-H (Chemistry, Engineering and Medicine for Human Health), Stanford University, Palo Alto, CA 94304, USA
- Department of Chemical Engineering, Stanford University, Palo Alto, CA 94304, USA
- Department of Chemistry, Stanford University, Palo Alto, CA 94304, USA
| | - Robert P. St. Onge
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
| | - Yi Tang
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA
| | - Maureen E. Hillenmeyer
- Stanford Genome Technology Center, Stanford University School of Medicine, Palo Alto, CA 94304, USA
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Sasaki S, Azuma E, Sasamori T, Tokitoh N, Kuramochi K, Tsubaki K. Formation of Phenalenone Skeleton by an Unusual Rearrangement Reaction. Org Lett 2017; 19:4846-4849. [PMID: 28846422 DOI: 10.1021/acs.orglett.7b02305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The frame rearrangement reaction of dinaphthyl ketones, possessing hydroxy groups at appropriate positions, into phenalenone derivatives under acidic conditions was discovered serendipitously. Although this rearrangement had limited scope, its mechanism was unusual, involving the division of naphthalene rings into one phenalenone ring and one benzene ring. The reaction mechanism was elucidated by direct determination of intermediate structures using 1H NMR measurements. The generated phenalenones are expected to be key intermediates toward natural products and functional materials.
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Affiliation(s)
- Sayaka Sasaki
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University , Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
| | - Eriko Azuma
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University , Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
| | - Takahiro Sasamori
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
| | - Norihiro Tokitoh
- Institute for Chemical Research, Kyoto University , Uji, Kyoto 611-0011, Japan
| | - Kouji Kuramochi
- Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Kazunori Tsubaki
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University , Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
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Komlaga G, Genta-Jouve G, Cojean S, Dickson RA, Mensah ML, Loiseau PM, Champy P, Beniddir MA. Antiplasmodial Securinega alkaloids from Phyllanthus fraternus: Discovery of natural (+)-allonorsecurinine. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.08.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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24
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Li Y, Yue Q, Jayanetti DR, Swenson DC, Bartholomeusz GA, An Z, Gloer JB, Bills GF. Anti-Cryptococcus Phenalenones and Cyclic Tetrapeptides from Auxarthron pseudauxarthron. JOURNAL OF NATURAL PRODUCTS 2017; 80:2101-2109. [PMID: 28657331 PMCID: PMC5629637 DOI: 10.1021/acs.jnatprod.7b00341] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Auxarthrones A-E (1-5), five new phenalenones, and two new naturally occurring cyclic tetrapeptides, auxarthrides A (7) and B (8), were obtained from three different solvent extracts of cultures of the coprophilous fungus Auxarthron pseudauxarthron. Auxarthrones C (3) and E (5) possess an unusual 7a,8-dihydrocyclopenta[a]phenalene-7,9-dione ring system that has not been previously observed in natural products. Formation of 1-5 was found to be dependent on the solvent used for culture extraction. The structures of these new compounds were elucidated primarily by analysis of NMR and MS data. Auxarthrone A (1) was obtained as a mixture of chromatographically inseparable racemic diastereomers (1a and 1b) that cocrystallized, enabling confirmation of their structures by X-ray crystallography. The absolute configurations of 7 and 8 were assigned by analysis of their acid hydrolysates using Marfey's method. Compound 1 displayed moderate antifungal activity against Cryptococcus neoformans and Candida albicans, but did not affect human cancer cell lines.
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Affiliation(s)
- Yan Li
- Texas Therapeutic Institute, The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas 77054, United States
| | - Qun Yue
- Texas Therapeutic Institute, The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas 77054, United States
| | - Dinith R. Jayanetti
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Dale C. Swenson
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Geoffrey A. Bartholomeusz
- Department of Experimental Therapeutics, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center, Houston, Texas 77054, United States
| | - Zhiqiang An
- Texas Therapeutic Institute, The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas 77054, United States
| | - James B. Gloer
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
| | - Gerald F. Bills
- Texas Therapeutic Institute, The Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas 77054, United States
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25
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Abstract
Oxidative cyclizations are important transformations that occur widely during natural product biosynthesis. The transformations from acyclic precursors to cyclized products can afford morphed scaffolds, structural rigidity, and biological activities. Some of the most dramatic structural alterations in natural product biosynthesis occur through oxidative cyclization. In this Review, we examine the different strategies used by nature to create new intra(inter)molecular bonds via redox chemistry. This Review will cover both oxidation- and reduction-enabled cyclization mechanisms, with an emphasis on the former. Radical cyclizations catalyzed by P450, nonheme iron, α-KG-dependent oxygenases, and radical SAM enzymes are discussed to illustrate the use of molecular oxygen and S-adenosylmethionine to forge new bonds at unactivated sites via one-electron manifolds. Nonradical cyclizations catalyzed by flavin-dependent monooxygenases and NAD(P)H-dependent reductases are covered to show the use of two-electron manifolds in initiating cyclization reactions. The oxidative installations of epoxides and halogens into acyclic scaffolds to drive subsequent cyclizations are separately discussed as examples of "disappearing" reactive handles. Last, oxidative rearrangement of rings systems, including contractions and expansions, will be covered.
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Affiliation(s)
- Man-Cheng Tang
- Department of Chemical and Biomolecular Engineering, Department of Chemistry and Biochemistry, University of California, Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Yi Zou
- Department of Chemical and Biomolecular Engineering, Department of Chemistry and Biochemistry, University of California, Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095, USA
| | - Kenji Watanabe
- Department of Pharmaceutical Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
| | - Christopher T. Walsh
- Stanford University Chemistry, Engineering, and Medicine for Human Health (ChEM-H), Stanford University, 443 Via Ortega, Stanford, CA 94305
| | - Yi Tang
- Department of Chemical and Biomolecular Engineering, Department of Chemistry and Biochemistry, University of California, Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095, USA
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26
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Gao SS, Garcia-Borràs M, Barber JS, Hai Y, Duan A, Garg NK, Houk KN, Tang Y. Enzyme-Catalyzed Intramolecular Enantioselective Hydroalkoxylation. J Am Chem Soc 2017; 139:3639-3642. [PMID: 28240554 DOI: 10.1021/jacs.7b01089] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Hydroalkoxylation is a powerful and efficient method of forming C-O bonds and cyclic ethers in synthetic chemistry. In studying the biosynthesis of the fungal natural product herqueinone, we identified an enzyme that can perform an intramolecular enantioselective hydroalkoxylation reaction. PhnH catalyzes the addition of a phenol to the terminal olefin of a reverse prenyl group to give a dihydrobenzofuran product. The enzyme accelerates the reaction by 3 × 105-fold compared to the uncatalyzed reaction. PhnH belongs to a superfamily of proteins with a domain of unknown function (DUF3237), of which no member has a previously verified function. The discovery of PhnH demonstrates that enzymes can be used to promote the enantioselective hydroalkoxylation reaction and form cyclic ethers.
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Affiliation(s)
- Shu-Shan Gao
- Department of Chemical and Biomolecular Engineering and ⊥Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - Marc Garcia-Borràs
- Department of Chemical and Biomolecular Engineering and ⊥Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - Joyann S Barber
- Department of Chemical and Biomolecular Engineering and ⊥Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - Yang Hai
- Department of Chemical and Biomolecular Engineering and ⊥Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - Abing Duan
- Department of Chemical and Biomolecular Engineering and ⊥Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - Neil K Garg
- Department of Chemical and Biomolecular Engineering and ⊥Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - K N Houk
- Department of Chemical and Biomolecular Engineering and ⊥Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - Yi Tang
- Department of Chemical and Biomolecular Engineering and ⊥Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
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27
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Zang Y, Genta-Jouve G, Escargueil AE, Larsen AK, Guedon L, Nay B, Prado S. Antimicrobial Oligophenalenone Dimers from the Soil Fungus Talaromyces stipitatus. JOURNAL OF NATURAL PRODUCTS 2016; 79:2991-2996. [PMID: 27966935 DOI: 10.1021/acs.jnatprod.6b00458] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
New polyketide-derived oligophenalenone dimers, 9a-epi-bacillisporin E (1) and bacillisporins F-H (2-5), along with the known bacillisporin A (6), were isolated from the fungus Talaromyces stipitatus. Their structures and absolute configurations were determined on the basis of spectroscopic analyses, electronic circular dichroism, and GIAO NMR shift calculation followed by DP4 analysis. The antimicrobial activity of these compounds was evaluated against a panel of human pathogenic bacteria. Among them, bacillisporin H (5) exhibited antimicrobial activity together with modest cytotoxicity against HeLa cells.
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Affiliation(s)
- Yi Zang
- Unité Molécules de Communication et Adaptation des Micro-organismes (UMR 7245), Sorbonne Université, Muséum National d'Histoire Naturelle , CNRS, CP 54, 57 Rue Cuvier, 75005 Paris, France
| | - Grégory Genta-Jouve
- C-TAC, UMR 8638 CNRS, Faculté des Sciences Pharmaceutiques et Biologiques, Paris Descartes University , Sorbonne Paris Cité, 4 Avenue de l'Observatoire, 75006 Paris, France
| | - Alexandre E Escargueil
- UPMC Univ Paris 06, INSERM, Laboratory of Cancer Biology and Therapeutics, Centre de Recherche Saint-Antoine (CRSA), Sorbonne Universités , UMR_S 938, F-75012 Paris, France
| | - Annette K Larsen
- UPMC Univ Paris 06, INSERM, Laboratory of Cancer Biology and Therapeutics, Centre de Recherche Saint-Antoine (CRSA), Sorbonne Universités , UMR_S 938, F-75012 Paris, France
| | - Laura Guedon
- Unité Molécules de Communication et Adaptation des Micro-organismes (UMR 7245), Sorbonne Université, Muséum National d'Histoire Naturelle , CNRS, CP 54, 57 Rue Cuvier, 75005 Paris, France
| | - Bastien Nay
- Unité Molécules de Communication et Adaptation des Micro-organismes (UMR 7245), Sorbonne Université, Muséum National d'Histoire Naturelle , CNRS, CP 54, 57 Rue Cuvier, 75005 Paris, France
| | - Soizic Prado
- Unité Molécules de Communication et Adaptation des Micro-organismes (UMR 7245), Sorbonne Université, Muséum National d'Histoire Naturelle , CNRS, CP 54, 57 Rue Cuvier, 75005 Paris, France
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28
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Yu X, Liu F, Zou Y, Tang MC, Hang L, Houk KN, Tang Y. Biosynthesis of Strained Piperazine Alkaloids: Uncovering the Concise Pathway of Herquline A. J Am Chem Soc 2016; 138:13529-13532. [PMID: 27690412 DOI: 10.1021/jacs.6b09464] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nature synthesizes many strained natural products that have diverse biological activities. Uncovering these biosynthetic pathways may lead to biomimetic strategies for organic synthesis of such compounds. In this work, we elucidated the concise biosynthetic pathway of herquline A, a highly strained and reduced fungal piperazine alkaloid. The pathway builds on a nonribosomal peptide synthetase derived dityrosine piperazine intermediate. Following enzymatic reduction of the P450-cross-linked dicyclohexadienone, N-methylation of the piperazine serves as a trigger that leads to a cascade of stereoselective and nonenzymatic transformations. Computational analysis of key steps in the pathway rationalizes the observed reactivities.
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Affiliation(s)
- Xia Yu
- School of Pharmaceutical Sciences, Central South University , Changsha, Hunan 410013, People's Republic of China
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29
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Hill RA, Sutherland A. Hot off the Press. Nat Prod Rep 2016; 33:742-6. [DOI: 10.1039/c6np90022d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A personal selection of 33 recent papers is presented covering various aspects of current developments in bioorganic chemistry and novel natural products, such as epicochalasine A from Aspergillus flavipes.
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