1
|
Zhu S, Xu TC, Huang R, Gao Y, Wu SH. Four new polyketides from an endophytic fungus Talaromyces muroii. Fitoterapia 2024; 177:106073. [PMID: 38897246 DOI: 10.1016/j.fitote.2024.106073] [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: 02/19/2024] [Revised: 06/08/2024] [Accepted: 06/16/2024] [Indexed: 06/21/2024]
Abstract
In our continuous work on the isolation of endophytes, the endophytic fungal strain YIMF00209 was obtained from the roots of Gmelina arborea, which is an ethnic medicinal plant mainly distributed in Southeast Asia. The fermentation extracts of the strain exhibited significant antimicrobial activities against Staphylococcus aureus, Fusarium solani, and Escherichia coli. Based on morphological characteristics and phylogenetic analysis, it was identified as Talaromyces muroii. Four new polyketides, talaromurolides A-D (1-4), along with 26 known compounds (5-30), were isolated from the culture broth of the strain in two different media. Their structures were identified based on HRESIMS, NMR, and CD spectral data. Among them, compounds 2, 4-6, 19, 22, 24, 27, 28, and 30 were isolated from the fermentation broth in CYM medium; compounds 1, 3, 7-18, 20, 21, 23, 25, 26, and 29 were obtained from the fermentation broth in PDB medium; and compounds 2, 5, and 30 were existed in both two media. Compounds 6-9, 12, 16, 20, 21, 23, 25, and 29 were obtained from the genus Talaromyces for the first time. The antimicrobial activities of several compounds were assayed against six pathogens. Compound 1 exhibited inhibitory activities against S. aureus, E. coli, Candida albicans, Salmonella typhimurium, and Botrytis cinerea with MIC value of 64 μg/mL. Compound 25 exhibited antibacterial activity against E. coli with MIC value of 32 μg/mL.
Collapse
Affiliation(s)
- Sha Zhu
- Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China
| | - Tang-Chang Xu
- Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China
| | - Rong Huang
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Yuan Gao
- Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China
| | - Shao-Hua Wu
- Key Laboratory for Southwest Microbial Diversity of the Ministry of Education, Yunnan Institute of Microbiology, School of Life Sciences, Yunnan University, Kunming 650091, China.
| |
Collapse
|
2
|
Kim HW, Lee JW, Shim SH. Biosynthesis, biological activities, and structure-activity relationships of decalin-containing tetramic acid derivatives isolated from fungi. Nat Prod Rep 2024; 41:1294-1317. [PMID: 38916377 DOI: 10.1039/d4np00013g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/26/2024]
Abstract
Covering: up to December 2023Decalin-containing tetramic acid derivatives, especially 3-decalinoyltetramic acids (3-DTAs), are commonly found as fungal secondary metabolites. Numerous biological activities of this class of compounds, such as antibiotic, antiviral, antifungal, antiplasmodial, and antiprotozoal properties, have been the subject of ongoing research. For this reason, these molecules have attracted a lot of interest from the scientific community and various efforts including semi-synthesis, co-culturing with bacteria and biosynthetic gene sequencing have been made to obtain more derivatives. In this review, 3-DTAs are classified into four major groups based on the absolute configuration of the bicyclic decalin ring. Their biosynthetic pathways, various biological activities, and structure-activity relationship are then introduced.
Collapse
Affiliation(s)
- Hyun Woo Kim
- College of Pharmacy, Duksung Women's University, Seoul 01369, Republic of Korea
| | - Jin Woo Lee
- College of Pharmacy, Dongguk University, Goyang, Republic of Korea.
| | - Sang Hee Shim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea.
| |
Collapse
|
3
|
Chen X, Li B. Analysis of Co-localized Biosynthetic Gene Clusters Identifies a Membrane-Permeabilizing Natural Product. JOURNAL OF NATURAL PRODUCTS 2024; 87:1694-1703. [PMID: 38949271 DOI: 10.1021/acs.jnatprod.3c01231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
Combination therapy is an effective strategy to combat antibiotic resistance. Multiple synergistic antimicrobial combinations are produced by enzymes encoded in biosynthetic gene clusters (BGCs) that co-localize on the bacterial genome. This phenomenon led to the hypothesis that mining co-localized BGCs will reveal new synergistic combinations of natural products. Here, we bioinformatically identified 38 pairs of co-localized BGCs, which we predict to produce natural products that are related to known compounds, including polycyclic tetramate macrolactams (PoTeMs). We further showed that ikarugamycin, a PoTeM, increases the membrane permeability of Acinetobacter baumannii and Staphylococcus aureus, which suggests that ikarugamycin might be an adjuvant that facilitates the entry of other natural products. Our work outlines a promising avenue to discover synergistic combinations of natural products by mining bacterial genomes.
Collapse
Affiliation(s)
- Xiaoyan Chen
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Bo Li
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| |
Collapse
|
4
|
Peach JT, Puntscher H, Höger H, Marko D, Warth B. Rats exposed to Alternaria toxins in vivo exhibit altered liver activity highlighted by disruptions in riboflavin and acylcarnitine metabolism. Arch Toxicol 2024:10.1007/s00204-024-03810-6. [PMID: 38951189 DOI: 10.1007/s00204-024-03810-6] [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: 04/12/2024] [Accepted: 06/19/2024] [Indexed: 07/03/2024]
Abstract
Natural toxins produced by Alternaria fungi include the mycotoxins alternariol, tenuazonic acid and altertoxins I and II. Several of these toxins have shown high toxicity even at low levels including genotoxic, mutagenic, and estrogenic effects. However, the metabolic effects of toxin exposure from Alternaria are understudied, especially in the liver as a key target. To gain insight into the impact of Alternaria toxin exposure on the liver metabolome, rats (n = 21) were exposed to either (1) a complex culture extract with defined toxin profiles from Alternaria alternata (50 mg/kg body weight), (2) the isolated, highly genotoxic altertoxin-II (ATX-II) (0.7 mg/kg of body weight) or (3) a solvent control. The complex mixture contained a spectrum of Alternaria toxins including a controlled dose of ATX-II, matching the concentration of the isolated ATX-II. Liver samples were collected after 24 h and analyzed via liquid chromatography-high-resolution mass spectrometry (LC-HRMS). Authentic reference standards (> 100) were used to identify endogenous metabolites and exogenous compounds from the administered exposures in tandem with SWATH-acquired MS/MS data which was used for non-targeted analysis/screening. Screening for metabolites produced by Alternaria revealed several compounds solely isolated in the liver of rats exposed to the complex culture, confirming results from a previously performed targeted biomonitoring study. This included the altersetin and altercrasin A that were tentatively identified. An untargeted metabolomics analysis found upregulation of acylcarnitines in rats receiving the complex Alternaria extract as well as downregulation of riboflavin in rats exposed to both ATX-II and the complex mixture. Taken together, this work provides a mechanistic view of Alternari toxin exposure and new suspect screening insights into hardly characterized Alternaria toxins.
Collapse
Affiliation(s)
- Jesse T Peach
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Hannes Puntscher
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Harald Höger
- Center for Biomedical Research, Medical University of Vienna, Vienna, Austria
| | - Doris Marko
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Benedikt Warth
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria.
- Exposome Austria, Research Infrastructure and National EIRENE Node, Vienna, Austria.
| |
Collapse
|
5
|
Shigeno S, Kadowaki M, Nagai K, Hosoda K, Terahara T, Nishimura T, Hasegawa N, Tomoda H, Ohshiro T. New polycyclic tetramate macrolactams with antimycobacterial activity produced by marine-derived Streptomyces sp. KKMA-0239. J Antibiot (Tokyo) 2024; 77:265-271. [PMID: 38531967 DOI: 10.1038/s41429-024-00710-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/11/2024] [Accepted: 02/06/2024] [Indexed: 03/28/2024]
Abstract
During our screening for anti-mycobacterial agents against Mycobacterium avium complex (MAC), two new polycyclic tetramate macrolactams (PTMs), named hydroxycapsimycin (1) and brokamycin (2), were isolated along with the known PTM, ikarugamycin (3), from the culture broth of marine-derived Streptomyces sp. KKMA-0239. The relative structures of 1 and 2 were elucidated by spectroscopic data analyses, including 1D and 2D NMR. Furthermore, the absolute configuration of 1 was confirmed by a single-crystal X-ray diffraction analysis. Compounds 2 and 3 exhibited moderate antimycobacterial activities against MAC, including clinically isolated drug-resistant M. avium.
Collapse
Affiliation(s)
- Satoru Shigeno
- Department of Microbial Chemistry, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Miyu Kadowaki
- Department of Microbial Chemistry, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Kenichiro Nagai
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Kanji Hosoda
- Department of Microbial Chemistry, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan
| | - Takeshi Terahara
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo, 108-8477, Japan
| | - Tomoyasu Nishimura
- Keio University Health Center, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Naoki Hasegawa
- Department of Infectious Diseases, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, 160-8582, Japan
| | - Hiroshi Tomoda
- Department of Microbial Chemistry, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan.
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan.
| | - Taichi Ohshiro
- Department of Microbial Chemistry, Graduate School of Pharmaceutical Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan.
- Medicinal Research Laboratories, School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo, 108-8641, Japan.
| |
Collapse
|
6
|
Zang H, Cheng Y, Li M, Zhou L, Hong LL, Deng H, Lin HW, Zhou Y. Mutagenetic analysis of the biosynthetic pathway of tetramate bripiodionen bearing 3-(2H-pyran-2-ylidene)pyrrolidine-2,4-dione skeleton. Microb Cell Fact 2024; 23:87. [PMID: 38515152 PMCID: PMC10956176 DOI: 10.1186/s12934-024-02364-7] [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: 01/22/2024] [Accepted: 03/12/2024] [Indexed: 03/23/2024] Open
Abstract
BACKGROUND Natural tetramates are a family of hybrid polyketides bearing tetramic acid (pyrrolidine-2,4-dione) moiety exhibiting a broad range of bioactivities. Biosynthesis of tetramates in microorganisms is normally directed by hybrid polyketide synthase (PKS) and nonribosomal peptide synthetase (NRPS) machineries, which form the tetramic acid ring by recruiting trans- or cis-acting thioesterase-like Dieckmann cyclase in bacteria. There are a group of tetramates with unique skeleton of 3-(2H-pyran-2-ylidene)pyrrolidine-2,4-dione, which remain to be investigated for their biosynthetic logics. RESULTS Herein, the tetramate type compounds bripiodionen (BPD) and its new analog, featuring the rare skeleton of 3-(2H-pyran-2-ylidene)pyrrolidine-2,4-dione, were discovered from the sponge symbiotic bacterial Streptomyces reniochalinae LHW50302. Gene deletion and mutant complementation revealed the production of BPDs being correlated with a PKS-NRPS biosynthetic gene cluster (BGC), in which a Dieckmann cyclase gene bpdE was identified by sit-directed mutations. According to bioinformatic analysis, the tetramic acid moiety of BPDs should be formed on an atypical NRPS module constituted by two discrete proteins, including the C (condensation)-A (adenylation)-T (thiolation) domains of BpdC and the A-T domains of BpdD. Further site-directed mutagenetic analysis confirmed the natural silence of the A domain in BpdC and the functional necessities of the two T domains, therefore suggesting that an unusual aminoacyl transthiolation should occur between the T domains of two NRPS subunits. Additionally, characterization of a LuxR type regulator gene led to seven- to eight-fold increasement of BPDs production. The study presents the first biosynthesis case of the natural molecule with 3-(2H-pyran-2-ylidene)pyrrolidine-2,4-dione skeleton. Genomic mining using BpdD as probe reveals that the aminoacyl transthiolation between separate NRPS subunits should occur in a certain population of NRPSs in nature.
Collapse
Affiliation(s)
- Haixia Zang
- Research Center for Marine Drugs, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Yijia Cheng
- Research Center for Marine Drugs, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Mengjia Li
- Research Center for Marine Drugs, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Lin Zhou
- Research Center for Marine Drugs, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Li-Li Hong
- Research Center for Marine Drugs, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Hai Deng
- Department of Chemistry, University of Aberdeen, Aberdeen, AB24 3UE, UK
| | - Hou-Wen Lin
- Research Center for Marine Drugs, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.
| | - Yongjun Zhou
- Research Center for Marine Drugs, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China.
| |
Collapse
|
7
|
Jung Y, Kwon C, Kim T, Lee JW, Shin MK, Shim SH. Tetramic acid-motif natural products from a marine fungus Tolypocladium cylindrosporum FB06 and their anti-Parkinson activities. MARINE LIFE SCIENCE & TECHNOLOGY 2024; 6:84-92. [PMID: 38433962 PMCID: PMC10902239 DOI: 10.1007/s42995-023-00198-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 10/09/2023] [Indexed: 03/05/2024]
Abstract
Tetramic acid-containing natural products are attracting significantly increasing attention from biologists and chemists due to their intriguing structures and biological activities. In the present study, two new tetramic acid alkaloids tolypyridone I (1) and tolypyridone J (2), together with five known ones (3-7), were isolated from cultures of a marine fungus Tolypocladium cylindrosporum FB06 isolate obtained from a marine sediment in Beaufort sea of North Alaska. Their structures were elucidated using 1D, 2D NMR, and HRESIMS. Their configurations were established on the basis of 1H coupling constants, ROESY correlations and DP4 calculations. Compound 2 was isolated as mixtures of rotational isomers with C-3 to C-7 axis between 4-hydroxy-2-pyridone and 1-ethyl-3,5-dimethylcyclohexane, hindering rotation. In our unbiased screening to discover neuroprotective compounds in an in vitro Parkinson's disease (PD) model, SH-SY5Y dopaminergic cells were treated with isolated compounds followed by treatment with 1-methyl-4-phenylpyridinium (MPP+), a parkinsonian neurotoxin. Among tested compounds, F-14329 (7) significantly protected cells from MPP+-induced cytotoxicity. MPP+-mediated cell death is known to be related to the regulation of Bcl-2 family proteins, specifically the down-regulation of anti-apoptotic Bcl-2 and the up-regulation of pro-apoptotic Bax levels. Treatment with 2 mmol/L of MPP+ for 24 h significantly reduced Bcl-2 levels compared to control treated with vehicle. However, treatment with F-14329 (7) attenuated such reduction. This study demonstrates that tetramic acid-motif compounds could be potential lead compounds for treating PD. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-023-00198-7.
Collapse
Affiliation(s)
- Yuna Jung
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, 08826 Republic of Korea
| | - Chaesun Kwon
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826 Republic of Korea
| | - Taeyeon Kim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, 08826 Republic of Korea
| | - Jin Woo Lee
- College of Pharmacy, Duksung Women’s University, Seoul, 01369 Republic of Korea
| | - Min-Kyoo Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, 08826 Republic of Korea
- College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, 08826 Republic of Korea
| | - Sang Hee Shim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul, 08826 Republic of Korea
| |
Collapse
|
8
|
Zhang Y, Liao G, Wang M, Zhang Z, Liu L, Song Y, Wang D, Hao T, Feng J, Xia B, Wang Y, Tang X, Chen Y. Human-associated bacteria adopt an unusual route for synthesizing 3-acetylated tetramates for environmental adaptation. MICROBIOME 2023; 11:97. [PMID: 37147735 PMCID: PMC10161427 DOI: 10.1186/s40168-023-01548-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/11/2023] [Indexed: 05/07/2023]
Abstract
BACKGROUND Tetramates or tetramic acid-containing compounds (TACs) are a group of bioactive natural products featuring a pyrrolidine-2,4-dione ring acknowledged being closed via Dieckmann cyclization. The cariogenic Streptococcus mutans strains bearing a muc biosynthetic gene cluster (BGC) can synthesize mutanocyclin (MUC), a 3-acetylated TAC that can inhibit both leukocyte chemotaxis and filamentous development in Candida albicans. Some strains can also accumulate reutericyclins (RTCs), the intermediates of MUC biosynthesis with antibacterial activities. However, the formation mechanism of the pyrrolidine-2,4-dione ring of MUC and the distribution of muc-like BGCs along with their ecological functions has not been explored extensively. RESULTS We demonstrated that a key intermediate of MUC biosynthesis, M-307, is installed by a hybrid nonribosomal peptide synthetase-polyketide synthase assembly line and its pyrrolidine-2,4-dione ring is closed via an unprecedented lactam bond formation style. Subsequent C-3 acetylation will convert M-307 to RTCs, which is then hydrolyzed by a deacylase, MucF, to remove the N-1 fatty acyl appendage to generate MUC. Distribution analysis showed that the muc-like BGCs distribute predominantly in human-associated bacteria. Interestingly, most of the muc-like BGCs possessing a mucF gene were isolated from human or livestock directly, indicating their involvement in alleviating the host's immune attacks by synthesizing MUC; while those BGCs lacking mucF gene distribute mainly in bacteria from fermented products, suggesting that they tend to synthesize RTCs to compete with neighboring bacteria. It is noteworthy that many bacteria in the same habitats (e.g., the oral cavity) lack the muc-like BGC, but possess functional MucF homologues to "detoxify" RTCs to MUC, including several competitive bacteria of S. mutans. We also comparably studied the distribution of TAS1, a fungal enzyme responsible for the production of phytotoxic tenuazonic acids (TeAs), a class of 3-acetylated TACs with similar structure but distinct biosynthetic mechanism to MUC, and found that it mainly exists in plants or crops. CONCLUSIONS The in vivo and in vitro experiments revealed that the pyrrolidine-2,4-dione ring of MUC is closed via lactam bond formation, which may be adopted by many TACs without 3-acyl decorations. Besides, we found that muc-like BGCs are widespread in human-associated bacteria and their shapes and main products can be influenced by the habitat environment and vice versa. By comparing with TeAs, we provided thought-provoking insights into how ecological and evolutionary forces drive bacteria and fungi to construct a common 3-acetylated pyrrolidine-2,4-dione core through different routes, and how the biosynthetic processes are delicately controlled to generate diverse 3-acetylated TACs for environmental adaptation. Video Abstract.
Collapse
Affiliation(s)
- Yuwei Zhang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ge Liao
- Institute of Chemical Biology, Shenzhen Bay Laboratory, 518132, Shenzhen, China
| | - Min Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, 529020, Guangdong, China
| | - Zhao Zhang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- Renal Division, Peking University First Hospital, Peking University Institute of Nephrology, Beijing, 100034, China
| | - Liwei Liu
- Department of Marine Pharmacy, College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315211, China
| | - Yuqin Song
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Dacheng Wang
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Tingting Hao
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jie Feng
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bin Xia
- Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Yixiang Wang
- Central Laboratory Peking University School and Hospital of Stomatology, Beijing, 100081, China
| | - Xiaoyu Tang
- Institute of Chemical Biology, Shenzhen Bay Laboratory, 518132, Shenzhen, China.
| | - Yihua Chen
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
- University of Chinese Academy of Sciences, Beijing, 100049, China.
| |
Collapse
|
9
|
Li H, Fu Y, Song F. Marine Aspergillus: A Treasure Trove of Antimicrobial Compounds. Mar Drugs 2023; 21:md21050277. [PMID: 37233471 DOI: 10.3390/md21050277] [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: 03/31/2023] [Revised: 04/22/2023] [Accepted: 04/25/2023] [Indexed: 05/27/2023] Open
Abstract
Secondary metabolites from marine organisms are diverse in structure and function. Marine Aspergillus is an important source of bioactive natural products. We reviewed the structures and antimicrobial activities of compounds isolated from different marine Aspergillus over the past two years (January 2021-March 2023). Ninety-eight compounds derived from Aspergillus species were described. The chemical diversity and antimicrobial activities of these metabolites will provide a large number of promising lead compounds for the development of antimicrobial agents.
Collapse
Affiliation(s)
- Honghua Li
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education of China, School of Light Industry, Beijing Technology and Business University, Beijing 100048, China
| | - Yanqi Fu
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education of China, School of Light Industry, Beijing Technology and Business University, Beijing 100048, China
| | - Fuhang Song
- Key Laboratory of Geriatric Nutrition and Health, Ministry of Education of China, School of Light Industry, Beijing Technology and Business University, Beijing 100048, China
| |
Collapse
|
10
|
Zhang Y, Lin M, Qin Y, Lu H, Xu X, Gao C, Liu Y, Luo W, Luo X. Anti-Vibrio potential of natural products from marine microorganisms. Eur J Med Chem 2023; 252:115330. [PMID: 37011553 DOI: 10.1016/j.ejmech.2023.115330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/28/2023] [Accepted: 03/28/2023] [Indexed: 03/31/2023]
Abstract
The emergence of drug-resistant Vibrio poses a serious threat to aquaculture and human health, thus there is an urgent need for the discovery of new related antibiotics. Given that marine microorganisms (MMs) are evidenced as important sources of antibacterial natural products (NPs), great attention has been gained to the exploration of potential anti-Vibrio agents from MMs. This review summarizes the occurrence, structural diversity, and biological activities of 214 anti-Vibrio NPs isolated from MMs (from 1999 to July 2022), including 108 new compounds. They were predominantly originated from marine fungi (63%) and bacteria (30%) with great structural diversity, including polyketides, nitrogenous compounds, terpenoids, and steroids, among which polyketides account for nearly half (51%) of them. This review will shed light on the development of MMs derived NPs as potential anti-Vibrio lead compounds with promising applications in agriculture and human health.
Collapse
|
11
|
tert-Butyl 2-Amino-3-cyano-5-oxo-4-phenyl-5,7-dihydropyrano[2,3-c]pyrrole-6(4H)-carboxylate. MOLBANK 2023. [DOI: 10.3390/m1575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Organocatalyzed synthesis of tert-butyl 2-amino-3-cyano-5-oxo-4-phenyl-5,7-dihydropyrano[2,3-c]pyrrole-6(4H)-carboxylate, prepared from Boc-tetramic acid and benzylidenemalononitrile, is disclosed. Two bifunctional noncovalent organocatalysts were employed, yielding the product as a racemic mixture in both cases. The structure of the new synthesized compound was confirmed by high resolution mass-spectrometry, 1H- and 13C-NMR, HSQC, and IR spectroscopy.
Collapse
|
12
|
1-(4-Chlorophenyl)-2-methyl-2-phenyl-5-(thiophen-2-yl)-1,2-dihydro-3H-pyrrol-3-one. MOLBANK 2022. [DOI: 10.3390/m1520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
1-(4-Chlorophenyl)-2-methyl-2-phenyl-5-(thiophen-2-yl)-1,2-dihydro-3H-pyrrol-3-one, was synthesized for the first time in 75% yield by the base-catalyzed intramolecular cyclization of 4-((4-chlorophenyl)amino)-4-phenyl-1-(thiophen-2-yl)pent-2-yn-1-one. The starting aminoacetylenic ketone was prepared by cross-coupling of available propargylamines with acyl chlorides in the presence of the PdCl2/CuI/Ph3P catalytic system.
Collapse
|
13
|
Zhang T, Cai G, Rong X, Xu J, Jiang B, Wang H, Li X, Wang L, Zhang R, He W, Yu L. Mining and characterization of the PKS-NRPS hybrid for epicoccamide A: a mannosylated tetramate derivative from Epicoccum sp. CPCC 400996. Microb Cell Fact 2022; 21:249. [PMID: 36419162 PMCID: PMC9685919 DOI: 10.1186/s12934-022-01975-2] [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: 10/10/2022] [Accepted: 11/16/2022] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Genomic analysis indicated that the genomes of ascomycetes might carry dozens of biosynthetic gene clusters (BGCs), yet many clusters have remained enigmatic. The ascomycete genus Epicoccum, belonging to the family Didymellaceae, is ubiquitous that colonizes different types of substrates and is associated with phyllosphere or decaying vegetation. Species of this genus are prolific producers of bioactive substances. The epicoccamides, as biosynthetically distinct mannosylated tetramate, were first isolated in 2003 from Epicoccum sp. In this study, using a combination of genome mining, chemical identification, genetic deletion, and bioinformatic analysis, we identified the required BGC epi responsible for epicoccamide A biosynthesis in Epicoccum sp. CPCC 400996. RESULTS The unconventional biosynthetic gene cluster epi was obtained from an endophyte Epicoccum sp. CPCC 400996 through AntiSMASH-based genome mining. The cluster epi includes six putative open reading frames (epiA-epiF) altogether, in which the epiA encodes a tetramate-forming polyketide synthase and nonribosomal peptide synthetases (PKS-NRPS hybrid). Sequence alignments and bioinformatic analysis to other metabolic pathways of fungal tetramates, we proposed that the gene cluster epi could be involved in generating epicoccamides. Genetic knockout of epiA completely abolished the biosynthesis of epicoccamide A (1), thereby establishing the correlation between the BGC epi and biosynthesis of epicoccamide A. Bioinformatic adenylation domain signature analysis of EpiA and other fungal PKS-NRPSs (NRPs) indicated that the EpiA is L-alanine incorporating tetramates megasynthase. Furthermore, based on the molecular structures of epicoccamide A and deduced gene functions of the cluster epi, a hypothetic metabolic pathway for biosynthesizing compound 1 was proposed. The corresponding tetramates releasing during epicoccamide A biosynthesis was catalyzed through Dieckmann-type cyclization, in which the reductive (R) domain residing in terminal module of EpiA accomplished the conversion. These results unveiled the underlying mechanism of epicoccamides biosynthesis and these findings might provide opportunities for derivatization of epicoccamides or generation of new chemical entities. CONCLUSION Genome mining and genetic inactivation experiments unveiled a previously uncharacterized PKS - NRPS hybrid-based BGC epi responsible for the generation of epicoccamide A (1) in endophyte Epicoccum sp. CPCC 400996. In addition, based on the gene cluster data, a hypothetical biosynthetic pathway of epicoccamide A was proposed.
Collapse
Affiliation(s)
- Tao Zhang
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China
| | - Guowei Cai
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China ,grid.452240.50000 0004 8342 6962Medical Research Center, Binzhou Medical University Hospital, Binzhou, 256603 Shandong China
| | - Xiaoting Rong
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China ,grid.510447.30000 0000 9970 6820College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, 212003 Jiangsu China
| | - Jingwen Xu
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China
| | - Bingya Jiang
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China
| | - Hao Wang
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China
| | - Xinxin Li
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China
| | - Lu Wang
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China
| | - Ran Zhang
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China
| | - Wenni He
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China
| | - Liyan Yu
- grid.506261.60000 0001 0706 7839Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050 China
| |
Collapse
|
14
|
Yu C, Chen L, Gao YL, Liu J, Li PL, Zhang ML, Li Q, Zhang HD, Tang MC, Li L. Discovery and biosynthesis of macrophasetins from the plant pathogen fungus Macrophomina phaseolina. Front Microbiol 2022; 13:1056392. [PMID: 36452919 PMCID: PMC9701702 DOI: 10.3389/fmicb.2022.1056392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 10/17/2022] [Indexed: 09/16/2023] Open
Abstract
3-Decalinoyltetramic acids (DTAs) are a class of natural products with chemical diversity and potent bioactivities. In fungal species there is a general biosynthetic route to synthesize this type of compounds, which usually features a polyketide synthase-nonribosomal peptide synthetase (PKS-NRPS) and a lipocalin-like Diels-Alderase (LLDAse). Using a synthetic biology approach, combining the bioinformatics analysis prediction and heterologous expression, we mined a PKS-NRPS and LLDAse encoding gene cluster from the plant pathogenic fungus Macrophomina phaseolina and characterized the cluster to be responsible for the biosynthesis of novel DTAs, macrophasetins. In addition, we investigated the biosynthesis of these compounds and validated the accuracy of the phylogeny-guided bioinformatics analysis prediction. Our results provided a proof of concept example to this approach, which may facilitate the discovery of novel DTAs from the fungal kingdom.
Collapse
Affiliation(s)
- Cui Yu
- Engineering Research Center of Industrial Microbiology (Ministry of Education) and College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Lin Chen
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
- Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, China
| | - Yang Le Gao
- Engineering Research Center of Industrial Microbiology (Ministry of Education) and College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Jia Liu
- Engineering Research Center of Industrial Microbiology (Ministry of Education) and College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Pei Lin Li
- Engineering Research Center of Industrial Microbiology (Ministry of Education) and College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Ming Liang Zhang
- Engineering Research Center of Industrial Microbiology (Ministry of Education) and College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Qin Li
- Engineering Research Center of Industrial Microbiology (Ministry of Education) and College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Huai Dong Zhang
- Engineering Research Center of Industrial Microbiology (Ministry of Education) and College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Man Cheng Tang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
- Zhangjiang Institute for Advanced Study, Shanghai Jiao Tong University, Shanghai, China
| | - Li Li
- Engineering Research Center of Industrial Microbiology (Ministry of Education) and College of Life Sciences, Fujian Normal University, Fuzhou, China
| |
Collapse
|
15
|
Nie Q, Guo S, Gao X. Unraveling the biosynthesis of penicillenols by genome mining PKS-NRPS gene clusters in Penicillium citrinum. AIChE J 2022; 68:e17885. [PMID: 36591370 PMCID: PMC9797205 DOI: 10.1002/aic.17885] [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: 05/19/2022] [Accepted: 07/16/2022] [Indexed: 01/05/2023]
Abstract
Penicillenols belong to the family of tetramic acids with anticancer and antibacterial activities. Here, we report the discovery of the biosynthetic gene cluster (pnc) for penicillenol A1 and E in Penicillium citrinum ATCC9849 by genome mining. We discover the pnc cluster based on the results of gene deletions in P. citrinum and gene cluster heterologous expression in Aspergillus nidulans. We also propose the assembly line of the PKS module in PncA with the reduction by PncB provides a highly reduce polyketide chain to be further linked with an L-threonine molecule and released from PncA to produce penicillenol E. Further formation of penicillenol A1 requires the N-methylation of tetramic acid group by PncC. Our work deepens the understanding of the biosynthetic logic for N-methylated tetramic acids and contributes to the discovery of new penicillenols by genome mining.
Collapse
Affiliation(s)
- Qiuyue Nie
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, USA
| | - Shuqi Guo
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, USA
| | - Xue Gao
- Department of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, USA
- Department of Bioengineering, Rice University, Houston, TX 77005, USA
- Department of Chemistry, Rice University, Houston, TX 77005, USA
| |
Collapse
|
16
|
Identification of PKS-NRPS Hybrid Metabolites in Marine-Derived Penicillium oxalicum. Mar Drugs 2022; 20:md20080523. [PMID: 36005526 PMCID: PMC9409647 DOI: 10.3390/md20080523] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 08/03/2022] [Accepted: 08/11/2022] [Indexed: 11/17/2022] Open
Abstract
Filamentous fungi are abundant resources of bioactive natural products. Here, 151 marine-derived fungi were collected from the north Yellow Sea and identified by an internal transcribed spacer (ITS) sequence. The crude extracts of all strains were evaluated for their antimicrobial activities and analyzed by HPLC fingerprint. Based on these, strain Penicillium oxalicum MEFC104 was selected for further investigation. Two new polyketide–amino acid hybrid compounds with feature structures of tetramic acid, oxopyrrolidine A and B, were isolated. Their planner structures were assigned by HRESIMS and 1D/2D NMR experiments. The absolute configurations were determined by modified Mosher’s method, J-based configuration analysis, and ECD calculations. Furthermore, the biosynthetic pathway was identified by bioinformatic analysis and gene-deletion experiments. This study established a link between oxopyrrolidines and the corresponding biosynthesis genes in P. oxalicum.
Collapse
|
17
|
Jiang M, Guo H, Wu Q, Yuan S, Liu L. Two New Picoline-Derived Meroterpenoids with Anti-Acetylcholinesterase Activity from Ascidian-Derived Fungus Amphichorda felina. Molecules 2022; 27:molecules27165076. [PMID: 36014315 PMCID: PMC9416303 DOI: 10.3390/molecules27165076] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 08/06/2022] [Accepted: 08/08/2022] [Indexed: 11/30/2022] Open
Abstract
Amphichoterpenoids D (1) and E (2), two new picoline-derived meroterpenoids with a rare 6/6/6 tricyclic pyrano[3,2-c]pyridinyl-γ-pyranone scaffold, were isolated from the ascidian-derived fungus Amphichorda felina SYSU-MS7908. Their structures, including the absolute configurations, were established by extensive spectroscopic methods (1D and 2D NMR and high-resolution mass spectrometry) and ECD calculations. Compounds 1 and 2 showed anti-acetylcholinesterase (anti-AChE) activities with IC50 values of 12.5 μM and 11.6 μM, respectively. The binding interactions between 1, 2, and AChE were investigated using molecular docking analyses.
Collapse
Affiliation(s)
- Minghua Jiang
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
| | - Heng Guo
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
| | - Qilin Wu
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
| | - Siwen Yuan
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
| | - Lan Liu
- School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
- Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Zhuhai 519082, China
- Correspondence:
| |
Collapse
|
18
|
Hansen KA, Kim RR, Lawton ES, Tran J, Lewis SK, Deol AS, Van Arnam EB. Bacterial Associates of a Desert Specialist Fungus-Growing Ant Antagonize Competitors with a Nocamycin Analog. ACS Chem Biol 2022; 17:1824-1830. [PMID: 35730734 DOI: 10.1021/acschembio.2c00187] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Fungus-growing ants are defended by antibiotic-producing bacterial symbionts in the genus Pseudonocardia. Nutrients provisioned by the ants support these symbionts but also invite colonization and competition from other bacteria. As an arena for chemically mediated bacterial competition, this niche offers a window into ecological antibiotic function with well-defined competing organisms. From multiple colonies of the desert specialist ant Trachymyrmex smithi, we isolated Amycolatopsis bacteria that inhibit the growth of Pseudonocardia symbionts under laboratory conditions. Using bioassay-guided fractionation, we discovered a novel analog of the antibiotic nocamycin that is responsible for this antagonism. We identified the biosynthetic gene cluster for this antibiotic, which has a suite of oxidative enzymes consistent with this molecule's more extensive oxidative tailoring relative to similar tetramic acid antibiotics. High genetic similarity to globally distributed soil Amycolatopsis isolates suggest that this ant-derived Amycolatopsis strain may be an opportunistic soil strain whose antibiotic production allows for competition in this specialized niche. This nocamycin analog adds to the catalog of novel bioactive molecules isolated from bacterial associates of fungus-growing ants, and its activity against ant symbionts represents, to our knowledge, the first putative ecological function for the widely distributed enoyl tetramic acid family of antibiotics.
Collapse
Affiliation(s)
- Katherine A Hansen
- Keck Science Department of Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, California 91711, United States
| | - Rose R Kim
- Keck Science Department of Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, California 91711, United States
| | - Elisabeth S Lawton
- Keck Science Department of Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, California 91711, United States
| | - Janet Tran
- Keck Science Department of Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, California 91711, United States
| | - Stephanie K Lewis
- Keck Science Department of Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, California 91711, United States
| | - Arjan S Deol
- Keck Science Department of Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, California 91711, United States
| | - Ethan B Van Arnam
- Keck Science Department of Claremont McKenna, Pitzer, and Scripps Colleges, Claremont, California 91711, United States
| |
Collapse
|
19
|
New 3-Acyl Tetramic Acid Derivatives from the Deep-Sea-Derived Fungus Lecanicillium fusisporum. Mar Drugs 2022; 20:md20040255. [PMID: 35447928 PMCID: PMC9031249 DOI: 10.3390/md20040255] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 04/04/2022] [Accepted: 04/04/2022] [Indexed: 11/16/2022] Open
Abstract
Seven rare C3-C6 reduced 3-acyl tetramic acid derivatives, lecanicilliumins A–G (1–7), along with the known analogue cladosporiumin D (8), were obtained from the extract of the deep-sea-derived fungus Lecanicillium fusisporum GXIMD00542 within the family Clavipitacae. Their structures were elucidated by extensive spectroscopic data analysis, quantum chemistry calculations and chemical reaction. Compounds 1, 2, 5–7 exhibited moderate anti-inflammatory activity against NF-κB production using lipopolysaccharide (LPS) induced RAW264.7 cells with EC50 values range of 18.49–30.19 μM.
Collapse
|
20
|
Abstract
Covering: 2020This review covers the literature published in 2020 for marine natural products (MNPs), with 757 citations (747 for the period January to December 2020) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1407 in 420 papers for 2020), together with the relevant biological activities, source organisms and country of origin. Pertinent reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. A meta analysis of bioactivity data relating to new MNPs reported over the last five years is also presented.
Collapse
Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. .,Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia.,School of Enivironment and Science, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
| | | |
Collapse
|
21
|
Yang J, Qi Y, Blodgett JAV, Wencewicz TA. Multifunctional P450 Monooxygenase CftA Diversifies the Clifednamide Pool through Tandem C-H Bond Activations. JOURNAL OF NATURAL PRODUCTS 2022; 85:47-55. [PMID: 35086337 DOI: 10.1021/acs.jnatprod.1c00606] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Polycyclic tetramate macrolactams (PTMs) are a class of structurally complex hybrid polyketide-nonribosomal peptide (PK-NRP) natural products produced by diverse bacteria. Several PTMs display pharmaceutically interesting bioactivities, and the early stages of PTM biosynthesis involving polyketide synthase (PKS) and nonribosomal peptide synthetase (NRPS) enzymology are well studied. However, the timing and mechanisms of post PKS-NRPS oxidations by P450 monooxygenases encoded in PTM biosynthetic gene clusters (BGCs) remain poorly characterized. Here we demonstrate that CftA, encoded in clifednamide-type PTM BGCs, is a multifunctional P450 monooxygenase capable of converting the C29-C30 ethyl side chain of ikarugamycin to either a C29-C30 methyl ketone or a C29-C30 hydroxymethyl ketone through C-H bond activation, resulting in the formation of clifednamide A or clifednamide C, respectively. We also report the complete structure of clifednamide C solved via multidimensional NMR (COSY, HSQC, HMBC, NOESY, and TOCSY) using material purified from an engineered Streptomyces strain optimized for production. Finally, the in vitro reconstitution of recombinant CftA catalytic activity revealed the oxidation cascade for sequential conversion of ikarugamycin to clifednamide A and clifednamide C. Our findings confirm prior genetics-based predictions on the origins of clifednamide complexity via P450s encoded in PTM BGCs and place CftA into a growing group of multifunctional P450s that tailor PTM natural products through late-stage regioselective C-H bond activation.
Collapse
Affiliation(s)
- Jinping Yang
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, Missouri 63130, United States
| | - Yunci Qi
- Department of Biology, Washington University in St. Louis, One Brookings Drive, St. Louis, Missouri 63130, United States
| | - Joshua A V Blodgett
- Department of Biology, Washington University in St. Louis, One Brookings Drive, St. Louis, Missouri 63130, United States
| | - Timothy A Wencewicz
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, Missouri 63130, United States
| |
Collapse
|
22
|
Bodenschatz K, Stöckl J, Winterer M, Schobert R. A synthetic approach to 5/5/6-polycyclic tetramate macrolactams of the discodermide type. Tetrahedron 2022. [DOI: 10.1016/j.tet.2021.132113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
23
|
Belen’kii LI, Gazieva GA, Evdokimenkova YB, Soboleva NO. The literature of heterocyclic chemistry, Part XX, 2020. ADVANCES IN HETEROCYCLIC CHEMISTRY 2022. [DOI: 10.1016/bs.aihch.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
|
24
|
Unten Y, Murai M, Sakai K, Asami Y, Yamamoto T, Masuya T, Miyoshi H. Natural tetramic acids elicit multiple inhibitory actions against mitochondrial machineries presiding over oxidative phosphorylation. Biosci Biotechnol Biochem 2021; 85:2368-2377. [PMID: 34625801 DOI: 10.1093/bbb/zbab176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 10/04/2021] [Indexed: 11/14/2022]
Abstract
The mitochondrial machineries presiding over ATP synthesis via oxidative phosphorylation are promising druggable targets. Fusaramin, a 3-acyl tetramic acid isolated from Fusarium concentricum FKI-7550, is an inhibitor of oxidative phosphorylation in Saccharomyces cerevisiae mitochondria, although its target has yet to be identified. Fusaramin significantly interfered with [3H]ADP uptake by yeast mitochondria at the concentration range inhibiting oxidative phosphorylation. A photoreactive fusaramin derivative (pFS-5) specifically labeled voltage-dependent anion channel 1 (VDAC1), which facilitates trafficking of ADP/ATP across the outer mitochondrial membrane. These results strongly suggest that the inhibition of oxidative phosphorylation by fusaramin is predominantly attributable to the impairment of VDAC1 functions. Fusaramin also inhibited FoF1-ATP synthase and ubiquinol-cytochrome c oxidoreductase (complex III) at concentrations higher than those required for the VDAC inhibition. Considering that other tetramic acid derivatives are reported to inhibit FoF1-ATP synthase and complex III, natural tetramic acids were found to elicit multiple inhibitory actions against mitochondrial machineries.
Collapse
Affiliation(s)
- Yufu Unten
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Masatoshi Murai
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | | | - Yukihiro Asami
- Graduate School of Infection Control Sciences
- Ōmura Satoshi Memorial Institute, Kitasato University, Tokyo, Japan
| | - Takenori Yamamoto
- Division of Molecular Target and Gene Therapy Production, National Institute of Health Sciences, Kanagawa, Japan
| | - Takahiro Masuya
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Hideto Miyoshi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| |
Collapse
|
25
|
Mohamed GA, Ibrahim SRM. Untapped Potential of Marine-Associated Cladosporium Species: An Overview on Secondary Metabolites, Biotechnological Relevance, and Biological Activities. Mar Drugs 2021; 19:645. [PMID: 34822516 PMCID: PMC8622643 DOI: 10.3390/md19110645] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 11/11/2021] [Accepted: 11/16/2021] [Indexed: 12/12/2022] Open
Abstract
The marine environment is an underexplored treasure that hosts huge biodiversity of microorganisms. Marine-derived fungi are a rich source of novel metabolites with unique structural features, bioactivities, and biotechnological applications. Marine-associated Cladosporium species have attracted considerable interest because of their ability to produce a wide array of metabolites, including alkaloids, macrolides, diketopiperazines, pyrones, tetralones, sterols, phenolics, terpenes, lactones, and tetramic acid derivatives that possess versatile bioactivities. Moreover, they produce diverse enzymes with biotechnological and industrial relevance. This review gives an overview on the Cladosporium species derived from marine habitats, including their metabolites and bioactivities, as well as the industrial and biotechnological potential of these species. In the current review, 286 compounds have been listed based on the reported data from 1998 until July 2021. Moreover, more than 175 references have been cited.
Collapse
Affiliation(s)
- Gamal A. Mohamed
- Department of Natural Products and Alternative Medicine, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Sabrin R. M. Ibrahim
- Preparatory Year Program, Batterjee Medical College, Jeddah 21442, Saudi Arabia;
- Department of Pharmacognosy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| |
Collapse
|
26
|
Pang X, Chen W, Wang X, Zhou X, Yang B, Tian X, Wang J, Xu S, Liu Y. New Tetramic Acid Derivatives From the Deep-Sea-Derived Fungus Penicillium sp. SCSIO06868 With SARS-CoV-2 M pro Inhibitory Activity Evaluation. Front Microbiol 2021; 12:730807. [PMID: 34646250 PMCID: PMC8503681 DOI: 10.3389/fmicb.2021.730807] [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: 06/25/2021] [Accepted: 08/27/2021] [Indexed: 11/18/2022] Open
Abstract
Three new tetramic acid derivatives (1–3) and a new polyketide (4) along with eight known compounds (5–12) were isolated from cultures of the deep-sea-derived fungus Penicillium sp. SCSIO06868. Four new structures were elucidated by analysis of one-dimensional/two-dimensional nuclear magnetic resonance (NMR) data and high-resolution electrospray ionization mass spectrometry. Their absolute configurations were established by X-ray crystallography analysis and comparison of the experimental and reported electronic circular dichroism (ECD) values or specific optical rotation. Compound 3 exhibited potent, selective inhibitory activities against Staphylococcus aureus and methicillin-resistant S. aureus with minimum inhibitory concentration values of both 2.5 μg/ml. Also, compound 3 showed weak antiviral activity against severe acute respiratory syndrome coronavirus 2 main protease, which was responsible for the coronavirus disease 2019 pandemic.
Collapse
Affiliation(s)
- Xiaoyan Pang
- 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 (CAS), Guangzhou, China.,Sanya Institute of Oceanology, SCSIO, Yazhou Scientific Bay, Sanya, China.,College of Chemistry and Materials Science, Jinan University, Guangzhou, China
| | - Weihao Chen
- 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 (CAS), Guangzhou, China
| | - Xin Wang
- Center for Innovative Marine Drug Screening and Evaluation, School of Medicine and Pharmacy, Ocean University of China, Qingdao, 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 (CAS), Guangzhou, China.,Sanya Institute of Oceanology, SCSIO, Yazhou Scientific Bay, Sanya, China
| | - Bin Yang
- 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 (CAS), Guangzhou, China.,Sanya Institute of Oceanology, SCSIO, Yazhou Scientific Bay, Sanya, China
| | - Xinpeng Tian
- 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 (CAS), Guangzhou, China.,Sanya Institute of Oceanology, SCSIO, Yazhou Scientific Bay, Sanya, China
| | - Junfeng Wang
- 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 (CAS), Guangzhou, China.,Sanya Institute of Oceanology, SCSIO, Yazhou Scientific Bay, Sanya, China
| | - Shihai Xu
- College of Chemistry and Materials Science, Jinan University, Guangzhou, China
| | - Yonghong Liu
- 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 (CAS), Guangzhou, China.,Sanya Institute of Oceanology, SCSIO, Yazhou Scientific Bay, Sanya, China
| |
Collapse
|
27
|
Chen S, Cai R, Liu Z, Cui H, She Z. Secondary metabolites from mangrove-associated fungi: source, chemistry and bioactivities. Nat Prod Rep 2021; 39:560-595. [PMID: 34623363 DOI: 10.1039/d1np00041a] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Covering 1989 to 2020The mangrove forests are a complex ecosystem occurring at tropical and subtropical intertidal estuarine zones and nourish a diverse group of microorganisms including fungi, actinomycetes, bacteria, cyanobacteria, algae, and protozoa. Among the mangrove microbial community, mangrove associated fungi, as the second-largest ecological group of the marine fungi, not only play an essential role in creating and maintaining this biosphere but also represent a rich source of structurally unique and diverse bioactive secondary metabolites, attracting significant attention of organic chemists and pharmacologists. This review summarizes the discovery relating to the source and characteristics of metabolic products isolated from mangrove-associated fungi over the past thirty years (1989-2020). Its emphasis included 1387 new metabolites from 451 papers, focusing on bioactivity and the unique chemical diversity of these natural products.
Collapse
Affiliation(s)
- Senhua Chen
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China
| | - Runlin Cai
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,College of Science, Shantou University, Shantou 515063, China
| | - Zhaoming Liu
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,State Key Laboratory of Applied Microbiology Southern China, Guangdong Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou 510070, China
| | - Hui Cui
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China. .,School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Zhigang She
- School of Chemistry, Sun Yat-sen University, Guangzhou 510006, China.
| |
Collapse
|
28
|
Bharadwaj KK, Sarkar T, Ghosh A, Baishya D, Rabha B, Panda MK, Nelson BR, John AB, Sheikh HI, Dash BP, Edinur HA, Pati S. Macrolactin A as a Novel Inhibitory Agent for SARS-CoV-2 M pro: Bioinformatics Approach. Appl Biochem Biotechnol 2021; 193:3371-3394. [PMID: 34212286 PMCID: PMC8248955 DOI: 10.1007/s12010-021-03608-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 06/21/2021] [Indexed: 12/27/2022]
Abstract
COVID-19 is a disease that puts most of the world on lockdown and the search for therapeutic drugs is still ongoing. Therefore, this study used in silico screening to identify natural bioactive compounds from fruits, herbaceous plants, and marine invertebrates that are able to inhibit protease activity in SARS-CoV-2 (PDB: 6LU7). We have used extensive screening strategies such as drug likeliness, antiviral activity value prediction, molecular docking, ADME, molecular dynamics (MD) simulation, and MM/GBSA. A total of 17 compounds were shortlisted using Lipinski’s rule in which 5 compounds showed significant predicted antiviral activity values. Among these 5, only 2 compounds, Macrolactin A and Stachyflin, showed good binding energy of −9.22 and −8.00 kcal/mol, respectively, within the binding pocket of the Mpro catalytic residues (HIS 41 and CYS 145). These two compounds were further analyzed to determine their ADME properties. The ADME evaluation of these 2 compounds suggested that they could be effective in developing therapeutic drugs to be used in clinical trials. MD simulations showed that protein–ligand complexes of Macrolactin A and Stachyflin with the target receptor (6LU7) were stable for 100 nanoseconds. The MM/GBSA calculations of Mpro–Macrolactin A complex indicated higher binding free energy (−42.58 ± 6.35 kcal/mol). Dynamic cross-correlation matrix (DCCM) and principal component analysis (PCA) on the residual movement in the MD trajectories further confirmed the stability of Macrolactin A bound state with 6LU7. In conclusion, this study showed that marine natural compound Macrolactin A could be an effective therapeutic inhibitor against SARS-CoV-2 protease (6LU7). Additional in vitro and in vivo validations are strongly needed to determine the efficacy and therapeutic dose of Macrolactin A in biological systems.
Collapse
Affiliation(s)
- Kaushik Kumar Bharadwaj
- Department of Bioengineering and Technology, Gauhati University, Guwahati, Assam, 781014, India
| | - Tanmay Sarkar
- Malda Polytechnic, West Bengal State Council of Technical Education, Govt. of West Bengal, Malda, West Bengal, 732102, India.,Department of Food Technology and Biochemical Engineering, Jadavpur University, Kolkata, West Bengal, 700038, India
| | - Arabinda Ghosh
- Microbiology Division, Department of Botany, Gauhati University, Guwahati, Assam, ,781014, India
| | - Debabrat Baishya
- Department of Bioengineering and Technology, Gauhati University, Guwahati, Assam, 781014, India
| | - Bijuli Rabha
- Department of Bioengineering and Technology, Gauhati University, Guwahati, Assam, 781014, India
| | - Manasa Kumar Panda
- Environment and Sustainability Department, CSIR-Institute of Minerals and Materials Technology, 751013, Bhubaneswar, India
| | - Bryan Raveen Nelson
- Institute of Tropical Biodiversity and Sustainable Development, University Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia.,Research Divisions, Association for Biodiversity Conservation and Research, Balasore, Odisha, 756001, India
| | - Akbar B John
- INOCEM Research Station, Kulliyyah of Science, International Islamic University Malaysia (IIUM), 25200, Kuantan, Pahang, Malaysia
| | - Hassan I Sheikh
- Faculty of Fisheries and Food Science, University Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia
| | - Bisnu Prasad Dash
- Department of Biosciences and Biotechnology, Fakir Mohan University, 756089, Balasore, India
| | - Hisham Atan Edinur
- Forensic Science Programme, School of Health Sciences, University Sains Malaysia, Health Campus, 16150, Kubang Kerian, Kelantan, Malaysia
| | - Siddhartha Pati
- Research Divisions, Association for Biodiversity Conservation and Research, Balasore, Odisha, 756001, India. .,Centre of Excellence (OHEPEE), Khallikote University, Berhampur, Ganjam, Odisha, 761008, India.
| |
Collapse
|
29
|
Dow L. How Do Quorum-Sensing Signals Mediate Algae-Bacteria Interactions? Microorganisms 2021; 9:microorganisms9071391. [PMID: 34199114 PMCID: PMC8307130 DOI: 10.3390/microorganisms9071391] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 06/11/2021] [Accepted: 06/15/2021] [Indexed: 11/16/2022] Open
Abstract
Quorum sensing (QS) describes a process by which bacteria can sense the local cell density of their own species, thus enabling them to coordinate gene expression and physiological processes on a community-wide scale. Small molecules called autoinducers or QS signals, which act as intraspecies signals, mediate quorum sensing. As our knowledge of QS has progressed, so too has our understanding of the structural diversity of QS signals, along with the diversity of bacteria conducting QS and the range of ecosystems in which QS takes place. It is now also clear that QS signals are more than just intraspecies signals. QS signals mediate interactions between species of prokaryotes, and between prokaryotes and eukaryotes. In recent years, our understanding of QS signals as mediators of algae-bacteria interactions has advanced such that we are beginning to develop a mechanistic understanding of their effects. This review will summarize the recent efforts to understand how different classes of QS signals contribute to the interactions between planktonic microalgae and bacteria in our oceans, primarily N-acyl-homoserine lactones, their degradation products of tetramic acids, and 2-alkyl-4-quinolones. In particular, this review will discuss the ways in which QS signals alter microalgae growth and metabolism, namely as direct effectors of photosynthesis, regulators of the cell cycle, and as modulators of other algicidal mechanisms. Furthermore, the contribution of QS signals to nutrient acquisition is discussed, and finally, how microalgae can modulate these small molecules to dampen their effects.
Collapse
Affiliation(s)
- Lachlan Dow
- Root Microbe Interactions Laboratory, Australian National University, Canberra 0200, Australia
| |
Collapse
|
30
|
Luo G, Zheng L, Wu Q, Chen S, Li J, Liu L. Fusarins G-L with Inhibition of NO in RAW264.7 from Marine-Derived Fungus Fusarium solani 7227. Mar Drugs 2021; 19:md19060305. [PMID: 34070447 PMCID: PMC8226964 DOI: 10.3390/md19060305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/20/2021] [Accepted: 05/22/2021] [Indexed: 11/20/2022] Open
Abstract
Six new fusarin derivatives, fusarins G–L (1–6), together with five known compounds (5–11) were isolated from the marine-derived fungus Fusarium solani 7227. The structures of the new compounds were elucidated by means of comprehensive spectroscopic methods (1D and 2D NMR, HRESIMS, ECD, and ORC) and X-ray crystallography. Compounds 5–11 exhibited potent anti-inflammatory activity by inhibiting the production of NO in RAW264.7 cells activated by lipopolysaccharide, with IC50 values ranging from 3.6 to 32.2 μM. The structure–activity relationships of the fusarins are discussed herein.
Collapse
Affiliation(s)
- Guangyuan Luo
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
| | - Li Zheng
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
| | - Qilin Wu
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
| | - Senhua Chen
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
| | - Jing Li
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai 519082, China
- Correspondence:
| | - Lan Liu
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
- Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Zhuhai 519082, China
| |
Collapse
|
31
|
Primahana G, Narmani A, Surup F, Teponno RB, Arzanlou M, Stadler M. Five Tetramic Acid Derivatives Isolated from the Iranian Fungus Colpoma quercinum CCTU A372. Biomolecules 2021; 11:biom11060783. [PMID: 34067463 PMCID: PMC8224775 DOI: 10.3390/biom11060783] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 05/19/2021] [Accepted: 05/20/2021] [Indexed: 01/31/2023] Open
Abstract
Submerged mycelial cultures of the ascomycete Colpoma quercinum CCTU A372 were found to produce five previously undescribed tetramic acids, for which we propose the trivial names colposetins A-C (1-3) and colpomenoic acids A and B (4 and 5), along with the known compounds penicillide (6) and monodictyphenone (7). The planar structures of 1-5 were determined by high-resolution electrospray ionization mass spectrometry (HR-ESIMS) and extensive 1D and 2D nuclear magnetic resonance (NMR) spectroscopy. Their absolute configurations were determined by the combination of electronic circular dischroism (ECD) analysis, J-based configurational analysis, and a rotating-frame Overhauser effect spectroscopy (ROESY) experiment. Colposetin B displayed weak antimicrobial activity against Bacillus subtilis and Mucor hiemalis (MIC 67 µg/mL).
Collapse
Affiliation(s)
- Gian Primahana
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (A.N.); (F.S.); (R.B.T.)
- Research Center for Chemistry, Indonesian Institute of Sciences (LIPI), Kawasan Puspiptek, Serpong, 15314 Tangerang Selatan, Indonesia
| | - Abolfazl Narmani
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (A.N.); (F.S.); (R.B.T.)
- Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz 51666, Iran;
| | - Frank Surup
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (A.N.); (F.S.); (R.B.T.)
| | - Rémy Bertrand Teponno
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (A.N.); (F.S.); (R.B.T.)
- Department of Chemistry, Faculty of Science, University of Dschang, P.O. Box 67, Dschang, Cameroon
| | - Mahdi Arzanlou
- Department of Plant Protection, Faculty of Agriculture, University of Tabriz, Tabriz 51666, Iran;
| | - Marc Stadler
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (A.N.); (F.S.); (R.B.T.)
- Correspondence:
| |
Collapse
|
32
|
Sinast M, Claasen B, Stöckl Y, Greulich A, Zens A, Baro A, Laschat S. Synthesis of Highly Functionalized Hydrindanes via Sequential Organocatalytic Michael/Mukaiyama Aldol Addition and Telescoped Hydrozirconation/Cross-Coupling as Key Steps: En Route to the AB System of Clifednamides. J Org Chem 2021; 86:7537-7551. [PMID: 34014095 DOI: 10.1021/acs.joc.1c00580] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The AB ring systems of the clifednamide family, polycyclic tetramate macrolactames (PoTeMs), were prepared by a new, convergent approach employing an intramolecular Diels-Alder (IMDA) reaction. Key steps comprise an organocatalytic Michael addition (>90% enantiomeric excess (ee)), a Mukaiyama aldol reaction for the convergent installation of a diene moiety, and a telescoped hydrozirconation/cross-coupling grafting an enone. The following IMDA furnished a highly functionalized hydrindane (diastereomeric ratio (dr) = 91:1) with the same configuration as the clifednamide scaffold. Advantages of this route are only one required protecting group, 13% overall yield over 9 steps (reduced from previously 17 steps/1.3% overall), and the potential access to the key intermediates in the clifednamide biosynthesis.
Collapse
Affiliation(s)
- Moritz Sinast
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Birgit Claasen
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Yannick Stöckl
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Andreas Greulich
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Anna Zens
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Angelika Baro
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Sabine Laschat
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| |
Collapse
|
33
|
Biologically active secondary metabolites and biotechnological applications of species of the family Chaetomiaceae (Sordariales): an updated review from 2016 to 2021. Mycol Prog 2021. [DOI: 10.1007/s11557-021-01704-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
34
|
An interpreted atlas of biosynthetic gene clusters from 1,000 fungal genomes. Proc Natl Acad Sci U S A 2021; 118:2020230118. [PMID: 33941694 DOI: 10.1073/pnas.2020230118] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Fungi are prolific producers of natural products, compounds which have had a large societal impact as pharmaceuticals, mycotoxins, and agrochemicals. Despite the availability of over 1,000 fungal genomes and several decades of compound discovery efforts from fungi, the biosynthetic gene clusters (BGCs) encoded by these genomes and the associated chemical space have yet to be analyzed systematically. Here, we provide detailed annotation and analyses of fungal biosynthetic and chemical space to enable genome mining and discovery of fungal natural products. Using 1,037 genomes from species across the fungal kingdom (e.g., Ascomycota, Basidiomycota, and non-Dikarya taxa), 36,399 predicted BGCs were organized into a network of 12,067 gene cluster families (GCFs). Anchoring these GCFs with reference BGCs enabled automated annotation of 2,026 BGCs with predicted metabolite scaffolds. We performed parallel analyses of the chemical repertoire of fungi, organizing 15,213 fungal compounds into 2,945 molecular families (MFs). The taxonomic landscape of fungal GCFs is largely species specific, though select families such as the equisetin GCF are present across vast phylogenetic distances with parallel diversifications in the GCF and MF. We compare these fungal datasets with a set of 5,453 bacterial genomes and their BGCs and 9,382 bacterial compounds, revealing dramatic differences between bacterial and fungal biosynthetic logic and chemical space. These genomics and cheminformatics analyses reveal the large extent to which fungal and bacterial sources represent distinct compound reservoirs. With a >10-fold increase in the number of interpreted strains and annotated BGCs, this work better regularizes the biosynthetic potential of fungi for rational compound discovery.
Collapse
|
35
|
Armin R, Zühlke S, Mahnkopp-Dirks F, Winkelmann T, Kusari S. Evaluation of Apple Root-Associated Endophytic Streptomyces pulveraceus Strain ES16 by an OSMAC-Assisted Metabolomics Approach. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.643225] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The One Strain Many Compounds approach (OSMAC) is a powerful and comprehensive method that enables the chemo-diversity evaluation of microorganisms. This is achieved by variations of physicochemical cultivation parameters and by providing biotic and abiotic triggers to mimic microorganisms' natural environment in the lab. This approach can reactivate the silent biosynthetic routes of specific metabolites typically not biosynthesized under standard laboratory conditions. In the present study, we combined the OSMAC approach with static headspace solid-phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS), high-performance liquid chromatography-high-resolution tandem mass spectrometry (HPLC-HRMSn), and matrix-assisted laser desorption/ionization high-resolution mass spectrometry imaging (MALDI-HRMSI) to evaluate the chemoecological significance of an apple root-associated endophytic Streptomyces pulveraceus strain ES16. We employed the OSMAC approach by cultivating the endophyte in six different media conditions and performed temporal studies over 14 days. Analysis of the volatilome revealed that only under stressful conditions associated with sporulation, endophytic S. pulveraceus ES16 produces geosmin, a volatile semiochemical known to attract the soil arthropods Collembola (springtails) specifically. Subsequently, targeted metabolic profiling revealed polycyclic tetramate macrolactams (PTMs) production by the endophyte under stress, which are bioactive against various pathogens. Additionally, the endophyte produced the iron-chelating siderophore, mirubactin, under the same conditions. The structures of the compounds were evaluated using HRMSn and by comparison with literature data. Finally, MALDI-HRMSI revealed the produced compounds' spatial-temporal distribution over 14 days. The compounds were profusely secreted into the medium after production. Our results indicate that endophytic S. pulveraceus ES16 can release the signal molecule geosmin, chemical defense compounds such as the PTMs, as well as the siderophore mirubactin into the host plant apoplast or the soil for ecologically meaningful purposes, which are discussed.
Collapse
|
36
|
Mo X, Gulder TAM. Biosynthetic strategies for tetramic acid formation. Nat Prod Rep 2021; 38:1555-1566. [PMID: 33710214 DOI: 10.1039/d0np00099j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Covering: up to the end of 2020Natural products bearing tetramic acid units as part of complex molecular architectures exhibit a broad range of potent biological activities. These compounds thus attract significant interest from both the biosynthetic and synthetic communities. Biosynthetically, most of the tetramic acids are derived from hybrid polyketide synthase (PKS) and nonribosomal peptide synthetase (NRPS) machineries. To date, over 30 biosynthetic gene clusters (BGCs) involved in tetramate formation have been identified, from which different biosynthetic strategies evolved in Nature to assemble this intriguing structural unit were characterized. In this Highlight we focus on the biosynthetic concepts of tetramic acid formation and discuss the molecular mechanism towards selected representatives in detail, providing a systematic overview for the development of strategies for targeted tetramate genome mining and future applications of tetramate-forming biocatalysts for chemo-enzymatic synthesis.
Collapse
Affiliation(s)
- Xuhua Mo
- Shandong Key Laboratory of Applied Mycology, School of Life Sciences, Qingdao Agricultural University, 266109 Qingdao, China. and Chair of Technical Biochemistry, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany.
| | - Tobias A M Gulder
- Chair of Technical Biochemistry, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany.
| |
Collapse
|
37
|
Kurt-Kızıldoğan A, Akarsu N, Otur Ç, Kivrak A, Aslan-Ertas N, Arslan S, Mutlu D, Konus M, Yılmaz C, Cetin D, Topal T, Şahin N. A Novel 4H-Chromen-4-One Derivative from Marine Streptomyces ovatisporus S4702T as Potential Antibacterial and Anti-Cancer Agent. Anticancer Agents Med Chem 2021; 22:362-370. [PMID: 33719978 DOI: 10.2174/1871520621666210311085748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 02/04/2021] [Accepted: 02/17/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Marine actinomycetes are among indispensable sources of natural bioactive compounds with unique antimicrobial and anti-cancer activities. OBJECTIVE Herein, it was aimed to elucidate bioactive potential of a marine-derived Streptomyces ovatisporus S4702T, isolated previously. METHODS Streptomyces ovatisporus S4702T was cultured in N-Z Amine broth and extraction was carried out using different organic solvents. Bioassay guided purification was followed by chemical characterization using NMR and LC-MS/MS. The compound was then evaluated for its antibacterial, antioxidant and cytotoxic activities. RESULTS Etyl acetate extracts gave the highest antibacterial activity and chemical characterization of this extract indicated the formula as C15H29O5N3 and the corresponding possible molecular structure as 4H-chromen-4-one derivative. It was found highly potent against Bacillus subtilis ATCC 6633 (MIC: 0.25 µg ml-1) and Micrococcus luteus ATCC 9341 (MBC: 0.5 µg ml-1). It has no remarkable antioxidant activity, but higher EC50 value and less cytotoxicity against normal cells. The EC50 values of this chromen derivative were found as 9.68 µg ml-1 for human colon carcinoma, 9.93 µg ml-1 for human prostate adenocarcinoma and 25.5 µg ml-1 for human embryonic kidney cells. CONCLUSION Overall, the presented 4H-chromen-4-one derivative is a remarkable bioactive compound with potent antibacterial and cytotoxic activity. With its high bioactive potential, it is proposed as a good candidate in medicine.
Collapse
Affiliation(s)
| | - Neslihan Akarsu
- Department of Agricultural Biotechnology, Ondokuz Mayıs University, 55139, Samsun. Turkey
| | - Çiğdem Otur
- Department of Agricultural Biotechnology, Ondokuz Mayıs University, 55139, Samsun. Turkey
| | - Arif Kivrak
- Department of Chemistry, Van Yuzuncu Yil University, 65080, Van. Turkey
| | | | - Sevki Arslan
- Department of Biology, Pamukkale University, 20100, Denizli. Turkey
| | - Dogukan Mutlu
- Department of Biology, Pamukkale University, 20100, Denizli. Turkey
| | - Metin Konus
- Department of Molecular Biology and Genetics, Van Yuzuncu Yil University, 65080, Van. Turkey
| | - Can Yılmaz
- Department of Molecular Biology and Genetics, Van Yuzuncu Yil University, 65080, Van. Turkey
| | - Dogan Cetin
- Department of Molecular Biology and Genetics, Van Yuzuncu Yil University, 65080, Van. Turkey
| | - Tufan Topal
- High Technology Application and Research Center, Pamukkale University, 20020, Denizli. Turkey
| | - Nevzat Şahin
- Department of Molecular Biology and Genetics, Ondokuz Mayıs University, 55139, Samsun. Turkey
| |
Collapse
|
38
|
Nweze JA, Mbaoji FN, Li YM, Yang LY, Huang SS, Chigor VN, Eze EA, Pan LX, Zhang T, Yang DF. Potentials of marine natural products against malaria, leishmaniasis, and trypanosomiasis parasites: a review of recent articles. Infect Dis Poverty 2021; 10:9. [PMID: 33482912 PMCID: PMC7821695 DOI: 10.1186/s40249-021-00796-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 01/06/2021] [Indexed: 12/26/2022] Open
Abstract
Background Malaria and neglected communicable protozoa parasitic diseases, such as leishmaniasis, and trypanosomiasis, are among the otherwise called diseases for neglected communities, which are habitual in underprivileged populations in developing tropical and subtropical regions of Africa, Asia, and the Americas. Some of the currently available therapeutic drugs have some limitations such as toxicity and questionable efficacy and long treatment period, which have encouraged resistance. These have prompted many researchers to focus on finding new drugs that are safe, effective, and affordable from marine environments. The aim of this review was to show the diversity, structural scaffolds, in-vitro or in-vivo efficacy, and recent progress made in the discovery/isolation of marine natural products (MNPs) with potent bioactivity against malaria, leishmaniasis, and trypanosomiasis. Main text We searched PubMed and Google scholar using Boolean Operators (AND, OR, and NOT) and the combination of related terms for articles on marine natural products (MNPs) discovery published only in English language from January 2016 to June 2020. Twenty nine articles reported the isolation, identification and antiparasitic activity of the isolated compounds from marine environment. A total of 125 compounds were reported to have been isolated, out of which 45 were newly isolated compounds. These compounds were all isolated from bacteria, a fungus, sponges, algae, a bryozoan, cnidarians and soft corals. In recent years, great progress is being made on anti-malarial drug discovery from marine organisms with the isolation of these potent compounds. Comparably, some of these promising antikinetoplastid MNPs have potency better or similar to conventional drugs and could be developed as both antileishmanial and antitrypanosomal drugs. However, very few of these MNPs have a pharmaceutical destiny due to lack of the following: sustainable production of the bioactive compounds, standard efficient screening methods, knowledge of the mechanism of action, partnerships between researchers and pharmaceutical industries. Conclusions It is crystal clear that marine organisms are a rich source of antiparasitic compounds, such as alkaloids, terpenoids, peptides, polyketides, terpene, coumarins, steroids, fatty acid derivatives, and lactones. The current and future technological innovation in natural products drug discovery will bolster the drug armamentarium for malaria and neglected tropical diseases.
Collapse
Affiliation(s)
- Justus Amuche Nweze
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, National Engineering Research Center of Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning, 530007, Guangxi, People's Republic of China.,Department of Microbiology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria.,Department of Science Laboratory Technology, Faculty of Physical Sciences, University of Nigeria, Nsukka, Nigeria.,College of Life Science and Technology of Guangxi University, Nanning, 530004, Guangxi, People's Republic of China
| | - Florence N Mbaoji
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, National Engineering Research Center of Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning, 530007, Guangxi, People's Republic of China.,College of Life Science and Technology of Guangxi University, Nanning, 530004, Guangxi, People's Republic of China.,Department of Pharmacology and Toxicology, Faculty of Pharmaceutical Sciences, University of Nigeria, Nsukka, Nigeria
| | - Yan-Ming Li
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, National Engineering Research Center of Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning, 530007, Guangxi, People's Republic of China
| | - Li-Yan Yang
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, National Engineering Research Center of Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning, 530007, Guangxi, People's Republic of China
| | - Shu-Shi Huang
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, National Engineering Research Center of Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning, 530007, Guangxi, People's Republic of China
| | - Vincent N Chigor
- Department of Microbiology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria.,Water and Public Health Research Group, University of Nigeria, Nsukka, PMB 410001, Enugu State, Nigeria
| | - Emmanuel A Eze
- Department of Microbiology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria
| | - Li-Xia Pan
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, National Engineering Research Center of Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning, 530007, Guangxi, People's Republic of China
| | - Ting Zhang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Key Laboratory of Parasite and Vector Biology of the Chinese Ministry of Health, Shanghai, 200025, People's Republic of China. .,National Health Commission Key Laboratory of Echinococcosis Prevention and Control, Xizang Center for Disease Control and Prevention, Linlang North Road, Lhasa, 850000, Tibet Autonomous Region, People's Republic of China.
| | - Deng-Feng Yang
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, National Engineering Research Center of Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Academy of Sciences, Nanning, 530007, Guangxi, People's Republic of China.
| |
Collapse
|
39
|
Chen S, Deng Y, Yan C, Wu Z, Guo H, Liu L, Liu H. Secondary Metabolites with Nitric Oxide Inhibition from Marine-Derived Fungus Alternaria sp. 5102. Mar Drugs 2020; 18:md18080426. [PMID: 32823987 PMCID: PMC7460390 DOI: 10.3390/md18080426] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 08/09/2020] [Accepted: 08/10/2020] [Indexed: 12/15/2022] Open
Abstract
Two new benzofurans, alternabenzofurans A and B (1 and 2) and two new sesquiterpenoids, alternaterpenoids A and B (3 and 4), along with 18 known polyketides (5−22), were isolated from the marine-derived fungus Alternaria sp. 5102. Their structures were elucidated on the basis of extensive spectroscopic analyses (1D and 2D NMR, HR-ESIMS, and ECD) and X-ray crystallography, as well as the modified Mosher’s method. Compounds 2, 3, 5, 7, 9–18, and 20–22 exhibited potent anti-inflammatory activity by inhibiting the production of NO in RAW264.7 cells activated by lipopolysaccharide with IC50 values in the range from 1.3 to 41.1 μM. Structure-activity relationships of the secondary metabolites were discussed.
Collapse
Affiliation(s)
- Senhua Chen
- School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China; (S.C.); (Z.W.); (H.G.); (L.L.)
- Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai 519000, China
| | - Yanlian Deng
- School of Pharmacy, Guangdong Medical University, Dongguan 523808, China; (Y.D.); (C.Y.)
| | - Chong Yan
- School of Pharmacy, Guangdong Medical University, Dongguan 523808, China; (Y.D.); (C.Y.)
| | - Zhenger Wu
- School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China; (S.C.); (Z.W.); (H.G.); (L.L.)
| | - Heng Guo
- School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China; (S.C.); (Z.W.); (H.G.); (L.L.)
| | - Lan Liu
- School of Marine Sciences, Sun Yat-sen University, Guangzhou 510006, China; (S.C.); (Z.W.); (H.G.); (L.L.)
- Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai), Zhuhai 519000, China
| | - Hongju Liu
- School of Pharmacy, Guangdong Medical University, Dongguan 523808, China; (Y.D.); (C.Y.)
- Correspondence: ; Tel.: +86-769-22896599
| |
Collapse
|