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Xu Y, Liang X, Hyun CG. Isolation, Characterization, Genome Annotation, and Evaluation of Hyaluronidase Inhibitory Activity in Secondary Metabolites of Brevibacillus sp. JNUCC 41: A Comprehensive Analysis through Molecular Docking and Molecular Dynamics Simulation. Int J Mol Sci 2024; 25:4611. [PMID: 38731830 PMCID: PMC11083829 DOI: 10.3390/ijms25094611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/19/2024] [Accepted: 04/22/2024] [Indexed: 05/13/2024] Open
Abstract
Brevibacillus sp. JNUCC 41, characterized as a plant-growth-promoting rhizobacterium (PGPR), actively participates in lipid metabolism and biocontrol based on gene analysis. This study aimed to investigate the crucial secondary metabolites in biological metabolism; fermentation, extraction, and isolation were performed, revealing that methyl indole-3-acetate showed the best hyaluronidase (HAase) inhibitory activity (IC50: 343.9 μM). Molecular docking results further revealed that the compound forms hydrogen bonds with the residues Tyr-75 and Tyr-247 of HAase (binding energy: -6.4 kcal/mol). Molecular dynamics (MD) simulations demonstrated that the compound predominantly binds to HAase via hydrogen bonding (MM-PBSA binding energy: -24.9 kcal/mol) and exhibits good stability. The residues Tyr-247 and Tyr-202, pivotal for binding in docking, were also confirmed via MD simulations. This study suggests that methyl indole-3-acetate holds potential applications in anti-inflammatory and anti-aging treatments.
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Affiliation(s)
| | | | - Chang-Gu Hyun
- Department of Beauty and Cosmetology, Jeju Inside Agency and Cosmetic Science Center, Jeju National University, Jeju 63243, Republic of Korea; (Y.X.); (X.L.)
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2
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Jalali E, Wang F, Overbay BR, Miller MD, Shaaban KA, Ponomareva LV, Ye Q, Saghaeiannejad-Esfahani H, Bhardwaj M, Steele AD, Teijaro CN, Shen B, Van Lanen SG, She QB, Voss SR, Phillips GN, Thorson JS. Biochemical and Structural Studies of the Carminomycin 4- O-Methyltransferase DnrK. JOURNAL OF NATURAL PRODUCTS 2024. [PMID: 38412432 DOI: 10.1021/acs.jnatprod.3c00947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Structural and functional studies of the carminomycin 4-O-methyltransferase DnrK are described, with an emphasis on interrogating the acceptor substrate scope of DnrK. Specifically, the evaluation of 100 structurally and functionally diverse natural products and natural product mimetics revealed an array of pharmacophores as productive DnrK substrates. Representative newly identified DnrK substrates from this study included anthracyclines, angucyclines, anthraquinone-fused enediynes, flavonoids, pyranonaphthoquinones, and polyketides. The ligand-bound structure of DnrK bound to a non-native fluorescent hydroxycoumarin acceptor, 4-methylumbelliferone, along with corresponding DnrK kinetic parameters for 4-methylumbelliferone and native acceptor carminomycin are also reported for the first time. The demonstrated unique permissivity of DnrK highlights the potential for DnrK as a new tool in future biocatalytic and/or strain engineering applications. In addition, the comparative bioactivity assessment (cancer cell line cytotoxicity, 4E-BP1 phosphorylation, and axolotl embryo tail regeneration) of a select set of DnrK substrates/products highlights the ability of anthracycline 4-O-methylation to dictate diverse functional outcomes.
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Affiliation(s)
| | - Fengbin Wang
- Department of Biosciences, Rice University, Houston, Texas 77030, United States
| | | | - Mitchell D Miller
- Department of Biosciences, Rice University, Houston, Texas 77030, United States
| | | | | | - Qing Ye
- Markey Cancer Center, Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
| | | | | | | | | | | | | | - Qing-Bai She
- Markey Cancer Center, Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
| | - S Randal Voss
- Department of Neuroscience, University of Kentucky, Lexington, Kentucky 40536, United States
- Ambystoma Genetic Stock Center, University of Kentucky, Lexington, Kentucky 40536, United States
- Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky 40536, United States
| | - George N Phillips
- Department of Biosciences, Rice University, Houston, Texas 77030, United States
- Department of Chemistry, Rice University, Houston, Texas 77030, United States
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3
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Induja DK, Jesmina ARS, Joseph MM, Shamjith S, Ingaladal N, Maiti KK, Kumar BSD, Lankalapalli RS. Isolation of two new stereochemical variants of streptophenazine by cocultivation of Streptomyces NIIST-D31, Streptomyces NIIST-D47, and Streptomyces NIIST-D63 strains in 3C 2 combinations. J Antibiot (Tokyo) 2023; 76:567-578. [PMID: 37308605 DOI: 10.1038/s41429-023-00638-7] [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: 03/03/2023] [Revised: 05/18/2023] [Accepted: 05/19/2023] [Indexed: 06/14/2023]
Abstract
Cocultivation of combinations of Streptomyces species isolated from the same soil was explored to isolate novel secondary metabolites. Recently, we reported the isolation of a novel vicinal diepoxide of alloaureothin along with three carboxamides, 4-aminobenzoic acid, and 1,6-dimethoxyphenazine from the individual culture of Streptomyces luteireticuli NIIST-D31. Herein, cocultivation of NIIST-D31 with Streptomyces luteoverticillatus NIIST-D47 afforded two new stereochemical variants of streptophenazine (S1 and S2), and 1-N-methylalbonoursin, where the individual culture of NIIST-D47 primarily produced carbazomycins A, D, and E. The new streptophenazines and 1-N-methylalbonoursin were also observed during cocultivation of NIIST-D31 with Streptomyces thioluteus NIIST-D63, where the individual culture of NIIST-D63 strain afforded for the first time 2,2'-bipyridines (caerulomycinamide and dipyrimicin B), picolinamide, 2,3-dimethoxybenzamide, 2-hydroxy-3-methoxybenzamide, and 6-amino-2-pyridone along with known natural products aureothin and 1,6-dimethoxyphenazine. Finally, cocultivation of NIIST-D47 and NIIST-D63 strains produced carbazomycins B and C, alloaureothin, cyclo-(Leu-Pro), investiamide, and 4-aminobenzoic acid. Some of the compounds observed in the individual cultures were also produced in cocultivations. Improvement in the yield of secondary metabolites during cocultivation compared to individual culturing is well-known, which is noted here for vicinal diepoxide of alloaureothin. The production of new streptophenazines by cocultivation combinations with NIIST-D31 suggests that NIIST-D47 and NIIST-D63 may function as inducers in activating cryptic secondary metabolite-biosynthetic gene clusters. Cytotoxicity of the new streptophenazines in cancerous (MCF7 and MDA-MB-231) or non-cancerous (WI-38) cells were tested, however, they exhibited no significant activity.
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Affiliation(s)
- D K Induja
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - A R S Jesmina
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
| | - Manu M Joseph
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
| | - Shanmughan Shamjith
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Nagaraja Ingaladal
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Kaustabh Kumar Maiti
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - B S Dileep Kumar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
| | - Ravi S Lankalapalli
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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4
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Jesmina ARS, Induja DK, Drissya T, Sruthi CR, Raghu KG, Nelson-Sathi S, Kumar BNSAD, Lankalapalli RS. In vitro antibacterial effects of combination of ciprofloxacin with compounds isolated from Streptomyces luteireticuli NIIST-D75. J Antibiot (Tokyo) 2023; 76:198-210. [PMID: 36781977 DOI: 10.1038/s41429-023-00600-7] [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: 10/22/2022] [Revised: 01/11/2023] [Accepted: 01/31/2023] [Indexed: 02/15/2023]
Abstract
Three phenazines, 1-methoxyphenazine (1), methyl-6-methoxyphenazine-1-carboxylate (2), 1,6-dimethoxyphenazine (4), and a 2,3-dimethoxy benzamide (3) were isolated from the Streptomyces luteireticuli NIIST-D75, and the antibacterial effects of compounds 1-3, each in combination with ciprofloxacin, were investigated. The in vitro antibacterial activity was assessed by microdilution, checkerboard, and time-kill assay against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Salmonella typhi. According to the checkerboard assay results, each combination of compounds 1, 2 and 3 with ciprofloxacin resulted in a significantly lower minimum inhibitory concentrations (MICs) of 0.02-1.37 µg ml-1, suggesting synergistic combinations by fractional inhibitory concentration index, and displayed bactericidal activity in time-kill kinetics within 48 h. SEM analysis was carried out to determine the changes in morphology in S. aureus and E. coli during treatment with individual combination of ciprofloxacin and compounds (1-3), which revealed drastic changes in the cells such as dent formation, biofilm disruption, cell bursting, and doughnut-like formation, change in surface morphology in S. aureus, and cell elongation, cell burst with ruptured cell, and change in surface morphology in E. coli. Hep G2 cell viability was not affected by the compounds (1-3) that were tested for cytotoxicity up to 250 µM.
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Affiliation(s)
- Abdul Rasheed Safiya Jesmina
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - D K Induja
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India
| | - Thankappan Drissya
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Chakiniplackal Rajan Sruthi
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Kozhiparambil Gopalan Raghu
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Shijulal Nelson-Sathi
- Transdisciplinary Biology, Bioinformatics Laboratory, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, 695014, India
| | - Bhaskaran Nair Saraswathy Amma Dileep Kumar
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Ravi S Lankalapalli
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, India.
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5
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Fine-Tuned Reactivity of N-Containing Naphthol Analogues. Int J Mol Sci 2022; 23:ijms232012329. [PMID: 36293186 PMCID: PMC9604367 DOI: 10.3390/ijms232012329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 10/06/2022] [Accepted: 10/11/2022] [Indexed: 11/29/2022] Open
Abstract
6-Hydroxyquinoline and 3-hydroxyisoquinoline as N-containing naphthol analogues were tested in modified Mannich reactions (mMr's). In the case of 6-hydroxyquinoline, the outcomes of the attempted Mannich reactions were strongly influenced by the amine components. Aminoalkylation of this substrate with reagents 1-naphthaldehyde and N-benzylmethylamine led to the isolation of a diol regarded as a stabilised water adduct of an ortho-quinone methide (o-QM), of which formation can be ascribed to the presence of a hydroxide ion in a relatively higher concentration generated by the bulky and basic amine component with decreased nucleophilicity. The classical Mannich base was isolated as a single product when the amine component was replaced for morpholine, featuring nucleophilicity rather than basic character under the applied reaction conditions. Starting from the isomer substrate 3-hydroxyisoquinoline, independently on the nucleophile (methanol or morpholine) besides the formation of the classical Mannich base, the nucleophilic attack at position one of the heterocyclic substrate was also observed. The DFT analysis of the acceptor molecular orbitals of the potential electrophilic components and the thermodynamics of the assumed-possible transformations demonstrated that this regioselective addition is a feasible process on the investigated heterocyclic skeleton. DFT modelling studies also suggest that besides the steric bulk, the orbital-controlled electronic properties of the aryl group, originating from the aldehyde components, have a strong influence on the ratios and the NMR-monitored interconversions of the C-1-substituted 3-hydroxyisoquinolines and the classical Mannich bases formed in multistep reaction sequences. On the basis of the DFT analysis of the thermodynamics of alternative pathways, a reaction mechanism was proposed for the rationalization of these characteristic substrate-controlled interconversions.
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6
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8-Hydroxyquinoline a natural chelating agent from Streptomyces spp. inhibits A549 lung cancer cell lines via BCL2/STAT3 regulating pathways. World J Microbiol Biotechnol 2022; 38:182. [PMID: 35953631 DOI: 10.1007/s11274-022-03368-4] [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: 05/30/2022] [Accepted: 07/28/2022] [Indexed: 10/15/2022]
Abstract
Biomolecules from Streptomyces spp. are emerging sources of natural drugs and have been focused on over the decade. The discovery of bioactive chemotherapeutic molecules from soil Streptomyces spp. has opened the medium for the search for natural drugs. In the current study, 8-HOQ was extracted and purified from soil Streptomyces spp. and was evaluated on A549 and BEAS cell lines. The apoptotic and caspase mediated pathways were evaluated using cell proliferation, dual fluorescent staining, migration, invasion and mRNA as well as protein quantification of apoptotic markers. In vitro cytotoxicity test revealed that 8-HOQ possesses potent cytotoxicity activities with IC50 values of 26 µM, 5 µM, 7.2 µM at 24 h, 48 h, and 72 h respectively against A549 lung cancer cell lines. The result also demonstrated that 8-HOQ from Streptomyces spp significantly inhibited the A549 lung cancer cell lines and activated the intrinsic pathways of apoptosis. The caspase-3 and caspase-8 activities were potentially elevated in 8-HOQ treated A549 cell lines and confirmed that 8-HOQ mediated A549 cancer cell death through the intrinsic pathway. The results explored caspase-mediated apoptosis as a mechanism underlying the inhibition of cancer cell viability in a dose-dependent manner. The expression of P53, BCL2 and STAT3 were inhibited in A549 cell lines and confirmed the metastasis inhibitory potential of 8-HOQ by blocking migration and invasion in A549 cell lines. These results indicated that 8-HOQ from Streptomyces spp. potentially inhibited growth and migration of A549 lung cancer cell lines.
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7
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Drissya T, Induja DK, Poornima MS, Jesmina ARS, Prabha B, Saumini M, Suresh CH, Raghu KG, Kumar BSD, Lankalapalli RS. A novel aureothin diepoxide derivative from Streptomyces sp. NIIST-D31 strain. J Antibiot (Tokyo) 2022; 75:491-497. [PMID: 35922482 DOI: 10.1038/s41429-022-00547-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/12/2022] [Accepted: 07/12/2022] [Indexed: 11/09/2022]
Abstract
A novel vicinal diepoxide of alloaureothin was isolated from Streptomyces sp. NIIST-D31 strain along with three carboxamides, p-aminobenzoic acid and 1,6-dimethoxyphenazine. Exhaustive 2D NMR analysis and analysis of experimental, theoretical CD spectra aided in establishing the structure of compound 1. Compound 1 inhibits adipogenesis and accumulation of lipid droplets during the differentiation of 3T3-L1 cells.
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Affiliation(s)
- Thankappan Drissya
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - D K Induja
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.,Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
| | - M S Poornima
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - A R S Jesmina
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Bernard Prabha
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
| | - Mathew Saumini
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.,Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
| | - Cherumuttathu H Suresh
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.,Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India
| | - K G Raghu
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - B S Dileep Kumar
- Agro-Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Ravi S Lankalapalli
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India. .,Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695019, Kerala, India.
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8
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Abstract
Actinomycetes are natural architects of numerous secondary metabolites including antibiotics. With increased multidrug-resistant (MDR) pathogens, antibiotics that can combat such pathogens are urgently required to improve the health care system globally. The characterization of actinomycetes available in Nepal is still very much untouched which is the reason why this paper showcases the characterization of actinomycetes from Nepal based on their morphology, 16S rRNA gene sequencing, and metabolic profiling. Additionally, antimicrobial assays and liquid chromatography-high resolution mass spectrometry (LC-HRMS) of ethyl acetate extracts were performed. In this study, we employed a computational-based dereplication strategy for annotating molecules which is also time-efficient. Molecular annotation was performed through the GNPS server, the SIRIUS platform, and the available databases to predict the secondary metabolites. The sequencing of the 16S rRNA gene revealed that the isolates BN6 and BN14 are closely related to Streptomyces species. BN14 showed broad-spectrum antibacterial activity with the zone of inhibition up to 30 mm against Staphylococcus aureus (MIC: 0.3051 µg/mL and MBC: 9.7656 µg/mL) and Shigella sonnei (MIC: 0.3051 µg/mL and MBC: 4.882 µg/mL). Likewise, BN14 also displayed significant inhibition to Acinetobacter baumannii, Klebsiella pneumoniae, and Salmonella typhi. GNPS approach suggested that the extracts of BN6 and BN14 consisted of diketopiperazines ((cyclo(D-Trp-L-Pro), cyclo(L-Leu-L-4-hydroxy-Pro), cyclo(L-Phe-D-Pro), cyclo(L-Trp-L-Pro), cyclo(L-Val-L-Pro)), and polypeptide antibiotics (actinomycin D and X2). Additional chemical scaffolds such as bacterial alkaloids (bohemamine, venezueline B, and G), anthramycin-type antibiotics (abbeymycin), lipase inhibitor (ebelactone B), cytocidal (oxopropaline D), antifungal and antitumor antibiotics (reductiomycin, streptimidone, deoxynybomycin), alaremycin, fumaramidmycin, anisomycin, and others were also annotated, which were further confirmed by using the SIRIUS platform, and literature survey. Thus, the bioprospecting of natural products from Streptomyces species from Nepal could be a potential source for the discovery of clinically significant and new antimicrobial agents in the future.
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Machushynets NV, Elsayed SS, Du C, Siegler MA, de la Cruz M, Genilloud O, Hankemeier T, van Wezel GP. Discovery of actinomycin L, a new member of the actinomycin family of antibiotics. Sci Rep 2022; 12:2813. [PMID: 35181725 PMCID: PMC8857259 DOI: 10.1038/s41598-022-06736-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 02/01/2022] [Indexed: 12/25/2022] Open
Abstract
Streptomycetes are major producers of bioactive natural products, including the majority of the naturally produced antibiotics. While much of the low-hanging fruit has been discovered, it is predicted that less than 5% of the chemical space of natural products has been mined. Here, we describe the discovery of the novel actinomycins L1 and L2 produced by Streptomyces sp. MBT27, via application of metabolic analysis and molecular networking. Actinomycins L1 and L2 are diastereomers, and the structure of actinomycin L2 was resolved using NMR and single crystal X-ray crystallography. Actinomycin L is formed via spirolinkage of anthranilamide to the 4-oxoproline moiety of actinomycin X2, prior to the condensation of the actinomycin halves. Such a structural feature has not previously been identified in naturally occurring actinomycins. Adding anthranilamide to cultures of the actinomycin X2 producer Streptomyces antibioticus, which has the same biosynthetic gene cluster as Streptomyces sp. MBT27, resulted in the production of actinomycin L. This supports a biosynthetic pathway whereby actinomycin L is produced from two distinct metabolic routes, namely those for actinomycin X2 and for anthranilamide. Actinomycins L1 and L2 showed significant antimicrobial activity against Gram-positive bacteria. Our work shows how new molecules can still be identified even in the oldest of natural product families.
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Affiliation(s)
- Nataliia V Machushynets
- Molecular Biotechnology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
| | - Somayah S Elsayed
- Molecular Biotechnology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
| | - Chao Du
- Molecular Biotechnology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
| | - Maxime A Siegler
- Department of Chemistry, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD, 21218, USA
| | - Mercedes de la Cruz
- Fundación MEDINA, Health Sciences Technology Park, Avda Conocimiento 34, 18016, Granada, Spain
| | - Olga Genilloud
- Fundación MEDINA, Health Sciences Technology Park, Avda Conocimiento 34, 18016, Granada, Spain
| | - Thomas Hankemeier
- Leiden Academic Centre for Drug Research (LACDR), Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Gilles P van Wezel
- Molecular Biotechnology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands.
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10
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Synthesis, characterization, in vitro biological and molecular docking evaluation of N,N'-(ethane-1,2-diyl)bis(benzamides). JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2021. [DOI: 10.1007/s13738-021-02199-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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11
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Nair V, Kim MC, Golen JA, Rheingold AL, Castro GA, Jensen PR, Fenical W. Verrucosamide, a Cytotoxic 1,4-Thiazepane-Containing Thiodepsipeptide from a Marine-Derived Actinomycete. Mar Drugs 2020; 18:md18110549. [PMID: 33167356 PMCID: PMC7694325 DOI: 10.3390/md18110549] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/02/2020] [Accepted: 11/03/2020] [Indexed: 12/22/2022] Open
Abstract
A new cytotoxic thiodepsipeptide, verrucosamide (1), was isolated along with the known, related cyclic peptide thiocoraline, from the extract of a marine-derived actinomycete, a Verrucosispora sp., our strain CNX-026. The new peptide, which is composed of two rare seven-membered 1,4-thiazepane rings, was elucidated by a combination of spectral methods and the absolute configuration was determined by a single X-ray diffraction study. Verrucosamide (1) showed moderate cytotoxicity and selectivity in the NCI 60 cell line bioassay. The most susceptible cell lines were MDA-MB-468 breast carcinoma with an LD50 of 1.26 µM, and COLO 205 colon adenocarcinoma with an LD50 of 1.4 µM. Also isolated along with verrucosamide were three small 3-hydroxy(alkoxy)-quinaldic acid derivatives that appear to be products of the same biosynthetic pathway.
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Affiliation(s)
- Vimal Nair
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, CA 92093-0204, USA; (V.N.); (M.C.K.); (G.A.C.); (P.R.J.)
| | - Min Cheol Kim
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, CA 92093-0204, USA; (V.N.); (M.C.K.); (G.A.C.); (P.R.J.)
| | - James A. Golen
- Department of Chemistry and Biochemistry, University of California, San Diego, CA 92093, USA; (J.A.G.); (A.L.R.)
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, CA 92093, USA; (J.A.G.); (A.L.R.)
| | - Gabriel A. Castro
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, CA 92093-0204, USA; (V.N.); (M.C.K.); (G.A.C.); (P.R.J.)
| | - Paul R. Jensen
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, CA 92093-0204, USA; (V.N.); (M.C.K.); (G.A.C.); (P.R.J.)
| | - William Fenical
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, CA 92093-0204, USA; (V.N.); (M.C.K.); (G.A.C.); (P.R.J.)
- Skaggs School of Pharmacy and Pharmaceutical Science, University of California, San Diego, CA 92093, USA
- Moores Comprehensive Cancer Center, University of California, San Diego, CA 92093, USA
- Correspondence: ; Tel.: +1-858-534-2133
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12
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Pham NKT, Tran TTL, Duong TH, Trung NT, Phan DCT, Mai DT, Nguyen VK, Huynh BLC, Nguyen TAT, Tran TD, Tran TNM, Nguyen TP. Ricicomin A, a new alkaloid from the leaves of Ricinus communis Linn. Nat Prod Res 2020; 36:1973-1979. [DOI: 10.1080/14786419.2020.1839456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
| | - Thi Thao Linh Tran
- Faculty of Environmental Science, Sai Gon University, Ho Chi Minh City, Vietnam
| | - Thuc Huy Duong
- Faculty of Chemistry, University of Education, Ho Chi Minh City, Vietnam
| | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modeling, Faculty of Natural Sciences, Quy Nhon University, Quy Nhon City, Vietnam
| | - Dang Cam Tu Phan
- Laboratory of Computational Chemistry and Modeling, Faculty of Natural Sciences, Quy Nhon University, Quy Nhon City, Vietnam
| | - Dinh Tri Mai
- Faculty of Chemistry, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- Bioactive Compounds Laboratory, Institute of Chemical Technology, Vietnam Academy of Science and Technology, Thanh Loc, Ho Chi Minh City, Vietnam
| | - Van Kieu Nguyen
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Bui Linh Chi Huynh
- Department of Nature, Dong Nai University, Đồng Nai, Dong Nai Province, Vietnam
| | | | - Trong Duc Tran
- GeneCology Research Centre, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
| | - Thi Ngoc Mai Tran
- Institute of Applied Sciences, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Tan Phat Nguyen
- Faculty of Chemistry, Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- Bioactive Compounds Laboratory, Institute of Chemical Technology, Vietnam Academy of Science and Technology, Thanh Loc, Ho Chi Minh City, Vietnam
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13
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Wewengkang DS, Yamazaki H, Takahashi M, Togashi T, Rotinsulu H, Sumilat DA, Namikoshi M. Production of an α-pyrone metabolite and microbial transformation of isoflavones by an Indonesian Streptomyces sp. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2020; 22:754-761. [PMID: 31311336 DOI: 10.1080/10286020.2019.1635588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 06/20/2019] [Accepted: 06/20/2019] [Indexed: 06/10/2023]
Abstract
A benzyl-α-pyrone metabolite, streptpyrone A (1), was obtained together with three known isoflavonoids, daidzein-7-O-α-l-rhamnoside (2), genistein-7-O-α-l-rhamnoside (3), and daidzein (4), from the culture broth of an Indonesian actinomycete Streptomyces sp. TPU1401A. The structure of 1, elucidated based on its spectroscopic data, has been reported as a synthetic compound. However, this is the first report of the isolation of 1 as a metabolite of microbial origin. Strain TPU1401A exhibited the ability to transform the isoflavone aglycones 4 and genistein (5) into the 7-O-glycosides 2 and 3, respectively. Compounds 2 and 3 promoted the growth of strain TPU1401A more effectively than compounds 4 and 5. These results suggest that strain TPU1401A utilizes isoflavone glycosides to promote growth by transforming isoflavones through microbial glycosidation.
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Affiliation(s)
- Defny S Wewengkang
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
- Faculty of Mathematic and Natural Sciences, Sam Ratulangi University, Manado 95115, Indonesia
| | - Hiroyuki Yamazaki
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
| | - Moe Takahashi
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
| | - Toshiki Togashi
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
| | - Henki Rotinsulu
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
- Faculty of Mathematic and Natural Sciences, Sam Ratulangi University, Manado 95115, Indonesia
| | - Deiske A Sumilat
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
- Faculty of Fisheries and Marine Science, Sam Ratulangi University, Manado 95115, Indonesia
| | - Michio Namikoshi
- Faculty of Pharmaceutical Sciences, Tohoku Medical and Pharmaceutical University, Sendai 981-8558, Japan
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Abstract
Over a long period of time, humans have explored many natural resources looking for remedies of various ailments. Traditional medicines have played an intrinsic role in human life for thousands of years, with people depending on medicinal plants and their products as dietary supplements as well as using them therapeutically for treatment of chronic disorders, such as cancer, malaria, diabetes, arthritis, inflammation, and liver and cardiac disorders. However, plant resources are not sufficient for treatment of recently emerging diseases. In addition, the seasonal availability and other political factors put constrains on some rare plant species. The actual breakthrough in drug discovery came concurrently with the discovery of penicillin from Penicillium notatum in 1929. This discovery dramatically changed the research of natural products and positioned microbial natural products as one of the most important clues in drug discovery due to availability, variability, great biodiversity, unique structures, and the bioactivities produced. The number of commercially available therapeutically active compounds from microbial sources to date exceeds those discovered from other sources. In this review, we introduce a short history of microbial drug discovery as well as certain features and recent research approaches, specifying the microbial origin, their featured molecules, and the diversity of the producing species. Moreover, we discuss some bioactivities as well as new approaches and trends in research in this field.
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15
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A combined experimental and theoretical analysis of the solid-state supramolecular self-assembly of N-(2,4-dichlorophenyl)-1-naphthamide: Synthesis, anticholinesterase potential and molecular docking analysis. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.07.077] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Savi DC, Shaaban KA, Gos FMW, Thorson JS, Glienke C, Rohr J. Secondary metabolites produced by Microbacterium sp. LGMB471 with antifungal activity against the phytopathogen Phyllosticta citricarpa. Folia Microbiol (Praha) 2019; 64:453-460. [PMID: 30565048 PMCID: PMC6531336 DOI: 10.1007/s12223-018-00668-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 11/27/2018] [Indexed: 11/29/2022]
Abstract
The citrus black spot (CBS), caused by Phyllosticta citricarpa, is one of the most important citrus diseases in subtropical regions of Africa, Asia, Oceania, and the Americas, and fruits with CBS lesions are still subject to quarantine regulations in the European Union. Despite the high application of fungicides, the disease remains present in the citrus crops of Central and South America. In order to find alternatives to help control CBS and reduce the use of fungicides, we explored the antifungal potential of endophytic actinomycetes isolated from the Brazilian medicinal plant Vochysia divergens found in the Pantanal biome. Two different culture media and temperatures were selected to identify the most efficient conditions for the production of active secondary metabolites. The metabolites produced by strain Microbacterium sp. LGMB471 cultured in SG medium at 36 °C considerably inhibited the development of P. citricarpa. Three isoflavones and five diketopiperazines were identified, and the compounds 7-O-β-D-glucosyl-genistein and 7-O-β-D-glucosyl-daidzein showed high activity against P. citricarpa, with the MIC of 33 μg/mL and inhibited the production of asexual spores of P. citricarpa on leaves and citrus fruits. Compounds that inhibit conidia formation may be a promising alternative to reduce the use of fungicides in the control of CBS lesions, especially in regions where sexual reproduction does not occur, as in the USA. Our data suggest the use of Microbacterium sp. LGMB471 or its metabolites as an ecological alternative to be used in association with the fungicides for the control of CBS disease.
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Affiliation(s)
- Daiani Cristina Savi
- Department of Genetics, Federal University of Paraná, Box 19031, Curitiba, PR, 81531-990, Brazil.
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536-0596, USA.
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536-0596, USA
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Francielly M W Gos
- Department of Basic Pathology, Federal University of Paraná, Curitiba, Brazil
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536-0596, USA
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Chirlei Glienke
- Department of Genetics, Federal University of Paraná, Box 19031, Curitiba, PR, 81531-990, Brazil.
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536-0596, USA.
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17
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Machushynets NV, Wu C, Elsayed SS, Hankemeier T, van Wezel GP. Discovery of novel glycerolated quinazolinones from Streptomyces sp. MBT27. J Ind Microbiol Biotechnol 2019; 46:483-492. [PMID: 30729343 PMCID: PMC6403205 DOI: 10.1007/s10295-019-02140-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 12/19/2018] [Indexed: 12/24/2022]
Abstract
Actinobacteria are a major source of novel bioactive natural products. A challenge in the screening of these microorganisms lies in finding the favorable growth conditions for secondary metabolite production and dereplication of known molecules. Here, we report that Streptomyces sp. MBT27 produces 4-quinazolinone alkaloids in response to elevated levels of glycerol, whereby quinazolinones A (1) and B (2) form a new sub-class of this interesting family of natural products. Global Natural Product Social molecular networking (GNPS) resulted in a quinazolinone-related network that included anthranilic acid (3), anthranilamide (4), 4(3H)-quinazolinone (5), and 2,2-dimethyl-1,2-dihydroquinazolin-4(3H)-one (6). Actinomycins D (7) and X2 (8) were also identified in the extracts of Streptomyces sp. MBT27. The induction of quinazolinone production by glycerol combined with biosynthetic insights provide evidence that glycerol is integrated into the chemical scaffold. The unprecedented 1,4-dioxepane ring, that is spiro-fused into the quinazolinone backbone, is most likely formed by intermolecular etherification of two units of glycerol. Our work underlines the importance of varying the growth conditions for the discovery of novel natural products and for understanding their biosynthesis.
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Affiliation(s)
- Nataliia V Machushynets
- Molecular Biotechnology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
| | - Changsheng Wu
- Molecular Biotechnology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands. .,State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, Qingdao, 266237, People's Republic of China.
| | - Somayah S Elsayed
- Molecular Biotechnology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
| | - Thomas Hankemeier
- Leiden Academic Centre for Drug Research (LACDR), Leiden University, Einsteinweg 55, 2333 CC, Leiden, The Netherlands
| | - Gilles P van Wezel
- Molecular Biotechnology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands.
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18
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New 3-Hydroxyquinaldic Acid Derivatives from Cultures of the Marine Derived Actinomycete Streptomyces cyaneofuscatus M-157. Mar Drugs 2018; 16:md16100371. [PMID: 30297652 PMCID: PMC6212950 DOI: 10.3390/md16100371] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 10/04/2018] [Accepted: 10/04/2018] [Indexed: 12/22/2022] Open
Abstract
Fractionation of the bioactive extract of a culture of the marine derived actinomycete Streptomyces cyaneofuscatus M-157 led to the isolation of the known 3-hydroxyquinaldic acid (4), its amide (5) and three new derivatives (1–3) containing different amino acid residues. The structures of the new molecules (1–3), including their absolute configuration, were determined by the analysis of their ESI-TOF MS and one-dimensional (1D) and two-dimensional (2D) NMR spectra and advanced Marfey’s analysis of their hydrolyzation products. Compound 3 spontaneously dimerized in solution to give the disulfide derivative 6. Unfortunately, none of the new compounds isolated confirmed the antimicrobial activity found in the bacterial extract, perhaps indicating that such antibacterial activity might be due to presence in the extract at the trace level of larger bioactive 3-hydroxyquinaldic acid derivatives from which compounds 1–3 are biosynthetic precursors. Cytotoxicity tests confirmed the moderate and weak IC50 values of 15.6 and 51.5 µM for compounds 5 and 1, respectively.
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19
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Aziz H, Saeed A, Jabeen F, Simpson J, Munawar A, Qasim M. Synthesis, crystal structure, cytotoxic, antileishmanial activities and docking studies on N,N′-(ethane-1,2-diyl)bis(3-methylbenzamide). J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.12.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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20
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Shaaban KA, Saunders MA, Zhang Y, Tran T, Elshahawi SI, Ponomareva LV, Wang X, Zhang J, Copley GC, Sunkara M, Kharel MK, Morris AJ, Hower JC, Tremblay MS, Prendergast MA, Thorson JS. Spoxazomicin D and Oxachelin C, Potent Neuroprotective Carboxamides from the Appalachian Coal Fire-Associated Isolate Streptomyces sp. RM-14-6. JOURNAL OF NATURAL PRODUCTS 2017; 80:2-11. [PMID: 28029795 PMCID: PMC5337259 DOI: 10.1021/acs.jnatprod.6b00948] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The isolation and structure elucidation of six new bacterial metabolites [spoxazomicin D (2), oxachelins B and C (4, 5), and carboxamides 6-8] and 11 previously reported bacterial metabolites (1, 3, 9-12a, and 14-18) from Streptomyces sp. RM-14-6 is reported. Structures were elucidated on the basis of comprehensive 1D and 2D NMR and mass spectrometry data analysis, along with direct comparison to synthetic standards for 2, 11, and 12a,b. Complete 2D NMR assignments for the known metabolites lenoremycin (9) and lenoremycin sodium salt (10) were also provided for the first time. Comparative analysis also provided the basis for structural revision of several previously reported putative aziridine-containing compounds [exemplified by madurastatins A1, B1, C1 (also known as MBJ-0034), and MBJ-0035] as phenol-dihydrooxazoles. Bioactivity analysis [including antibacterial, antifungal, cancer cell line cytotoxicity, unfolded protein response (UPR) modulation, and EtOH damage neuroprotection] revealed 2 and 5 as potent neuroprotectives and lenoremycin (9) and its sodium salt (10) as potent UPR modulators, highlighting new functions for phenol-oxazolines/salicylates and polyether pharmacophores.
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Affiliation(s)
- Khaled A. Shaaban
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Corresponding Authors: ,
| | - Meredith A. Saunders
- Department of Psychology and Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Yinan Zhang
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Tuan Tran
- California Institute for Biomedical Research (Calibr), La Jolla, California 92037, United States
| | - Sherif I. Elshahawi
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Larissa V. Ponomareva
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Xiachang Wang
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Jianjun Zhang
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Gregory C. Copley
- Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Manjula Sunkara
- Division of Cardiovascular Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Madan K. Kharel
- School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, United States
| | - Andrew J. Morris
- Division of Cardiovascular Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
| | - James C. Hower
- Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Matthew S. Tremblay
- California Institute for Biomedical Research (Calibr), La Jolla, California 92037, United States
| | - Mark A. Prendergast
- Department of Psychology and Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Jon S. Thorson
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Corresponding Authors: ,
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One-pot preparation of labelled mannan-peptide conjugate, model for immune cell processing. Glycoconj J 2015; 33:113-20. [PMID: 26666901 DOI: 10.1007/s10719-015-9644-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2015] [Revised: 11/30/2015] [Accepted: 12/02/2015] [Indexed: 01/24/2023]
Abstract
An efficient method for preparation of fluorescently labelled mannan-peptide glycoconjugates has been developed. After selective Dess-Martin periodinane oxidation of mannan, it was conjugated to the fluorescent label alone and a peptide with the label via reductive amination. Prepared glycoconjugates were characterised by HPSEC, FTIR-ATR and UV-VIS spectroscopy. Finally, the fluorescently labelled mannan and mannan-peptide conjugate were used for microscopic visualization of their accumulation in intracellular organelles of RAW 264.7 cells.
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22
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Xu GB, He G, Bai HH, Yang T, Zhang GL, Wu LW, Li GY. Indole Alkaloids from Chaetomium globosum. JOURNAL OF NATURAL PRODUCTS 2015; 78:1479-85. [PMID: 26125976 DOI: 10.1021/np5007235] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Guo-Bo Xu
- Key
Laboratory of Environmental and Applied Microbiology, Chengdu Institute
of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
- School
of Pharmacy, Guiyang Medical College, Guiyang, Guizhou 550004, People’s Republic of China
| | - Gu He
- State
Key Laboratory of Biotherapy/Collaborative Innovation Center of Biotherapy,
West China Hospital, Sichuan University, Chengdu, 610041, People’s Republic of China
| | - Huan-Huan Bai
- Key
Laboratory of Environmental and Applied Microbiology, Chengdu Institute
of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
| | - Tao Yang
- Key
Laboratory of Environmental and Applied Microbiology, Chengdu Institute
of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
| | - Guo-Lin Zhang
- Key
Laboratory of Environmental and Applied Microbiology, Chengdu Institute
of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
| | - Lin-Wei Wu
- Key
Laboratory of Environmental and Applied Microbiology, Chengdu Institute
of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
| | - Guo-You Li
- Key
Laboratory of Environmental and Applied Microbiology, Chengdu Institute
of Biology, Chinese Academy of Sciences, Chengdu 610041, People’s Republic of China
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23
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Guan Z, Hillrichs K, Ünlü C, Rissanen K, Nieger M, Schmidt A. Synthesis of 2-anilinobenzimidates, anthranilamides, and 2,3-dihydroquinazolin-4(1H)-ones from N-heterocyclic carbenes of indazole. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.11.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Xu GB, Pu X, Bai HH, Chen XZ, Li GY. A new alternariol glucoside from fungusAlternaria alternatecib-137. Nat Prod Res 2014; 29:848-52. [DOI: 10.1080/14786419.2014.990905] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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25
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Yang X, Peng T, Yang Y, Li W, Xiong J, Zhao L, Ding Z. Antimicrobial and antioxidant activities of a new benzamide from endophyticStreptomycessp. YIM 67086. Nat Prod Res 2014; 29:331-5. [DOI: 10.1080/14786419.2014.945174] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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27
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Xu GB, Yang T, Bao JK, Fang DM, Li GY. Isochaetomium A2, a new bis(naphthodihydropyran-4-one) with antimicrobial and immunological activities from fungus Chaetomium microcephalum. Arch Pharm Res 2013; 37:575-9. [PMID: 23907548 DOI: 10.1007/s12272-013-0206-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 07/03/2013] [Indexed: 10/26/2022]
Abstract
Isochaetomium A2 (1), a new bis(naphthodihydropyran-4-one), along with chaetochromins A (2) and B (3), was isolated from the solid-state fermented rice culture of Chaetomium microcephalum. The structure of compound 1 was elucidated on the basis of 1D and 2D NMR spectral data, and the relative configuration was confirmed by CD spectrum. Compounds 1-3 possessed significant antimicrobial activity against Escherichia coli 1.044, Staphylococcus aureus 1.252, and Bacillus subtilis 1.079. Moreover, compounds 1-3 showed obvious inhibitory effects on mouse spleen cell proliferation with successive IC50 values of 0.52, 0.19, and 0.24 μM.
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Affiliation(s)
- Guo-Bo Xu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, People's Republic of China
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