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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. J Nat Prod 2024. [PMID: 38412432 DOI: 10.1021/acs.jnatprod.3c00947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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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2
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Iantas J, Savi DC, Ponomareva LV, Thorson JS, Rohr J, Glienke C, Shaaban KA. Paecilins Q and R: Antifungal Chromanones Produced by the Endophytic Fungus Pseudofusicoccum stromaticum CMRP4328. Planta Med 2023; 89:1178-1189. [PMID: 36977488 PMCID: PMC10698238 DOI: 10.1055/a-2063-5481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Chemical investigation of the endophyte Pseudofusicoccum stromaticum CMRP4328 isolated from the medicinal plant Stryphnodendron adstringens yielded ten compounds, including two new dihydrochromones, paecilins Q (1: ) and R (2: ). The antifungal activity of the isolated metabolites was assessed against an important citrus pathogen, Phyllosticta citricarpa. Cytochalasin H (6: ) (78.3%), phomoxanthone A (3: ) (70.2%), phomoxanthone B (4: ) (63.1%), and paecilin Q (1: ) (50.5%) decreased in vitro the number of pycnidia produced by P. citricarpa, which are responsible for the disease dissemination in orchards. In addition, compounds 3: and 6: inhibited the development of citrus black spot symptoms in citrus fruits. Cytochalasin H (6: ) and one of the new compounds, paecilin Q (1: ), appear particularly promising, as they showed strong activity against this citrus pathogen, and low or no cytotoxic activity. The strain CMRP4328 of P. stromaticum and its metabolites deserve further investigation for the control of citrus black spot disease.
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Affiliation(s)
- Jucélia Iantas
- Postgraduate Program in Microbiology, Department of Pathology, Federal University of Paraná (UFPR), Curitiba, Brazil
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Kentucky, United States
| | - Daiani Cristina Savi
- Postgraduate Program in Genetics, Department of Genetics, Federal University of Paraná (UFPR), Curitiba, Brazil
- Department of Biomedicine, Centro Universitário Católica de Santa Catarina, Joinville, Brazil
| | - Larissa V. Ponomareva
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Kentucky, United States
| | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Kentucky, United States
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, United States
| | - Chirlei Glienke
- Postgraduate Program in Microbiology, Department of Pathology, Federal University of Paraná (UFPR), Curitiba, Brazil
- Postgraduate Program in Genetics, Department of Genetics, Federal University of Paraná (UFPR), Curitiba, Brazil
| | - Khaled A. Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Kentucky, United States
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3
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Tirkkonen H, Brown KV, Niemczura M, Faudemer Z, Brown C, Ponomareva LV, Helmy YA, Thorson JS, Nybo SE, Metsä-Ketelä M, Shaaban KA. Engineering BioBricks for Deoxysugar Biosynthesis and Generation of New Tetracenomycins. ACS Omega 2023; 8:21237-21253. [PMID: 37332790 PMCID: PMC10269268 DOI: 10.1021/acsomega.3c02460] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 05/18/2023] [Indexed: 06/20/2023]
Abstract
Tetracenomycins and elloramycins are polyketide natural products produced by several actinomycetes that exhibit antibacterial and anticancer activities. They inhibit ribosomal translation by binding in the polypeptide exit channel of the large ribosomal subunit. The tetracenomycins and elloramycins are typified by a shared oxidatively modified linear decaketide core, yet they are distinguished by the extent of O-methylation and the presence of a 2',3',4'-tri-O-methyl-α-l-rhamnose appended at the 8-position of elloramycin. The transfer of the TDP-l-rhamnose donor to the 8-demethyl-tetracenomycin C aglycone acceptor is catalyzed by the promiscuous glycosyltransferase ElmGT. ElmGT exhibits remarkable flexibility toward transfer of many TDP-deoxysugar substrates to 8-demethyltetracenomycin C, including TDP-2,6-dideoxysugars, TDP-2,3,6-trideoxysugars, and methyl-branched deoxysugars in both d- and l-configurations. Previously, we developed an improved host, Streptomyces coelicolor M1146::cos16F4iE, which is a stable integrant harboring the required genes for 8-demethyltetracenomycin C biosynthesis and expression of ElmGT. In this work, we developed BioBricks gene cassettes for the metabolic engineering of deoxysugar biosynthesis in Streptomyces spp. As a proof of concept, we used the BioBricks expression platform to engineer biosynthesis for d-configured TDP-deoxysugars, including known compounds 8-O-d-glucosyl-tetracenomycin C, 8-O-d-olivosyl-tetracenomycin C, 8-O-d-mycarosyl-tetracenomycin C, and 8-O-d-digitoxosyl-tetracenomycin C. In addition, we generated four new tetracenomycins including one modified with a ketosugar, 8-O-4'-keto-d-digitoxosyl-tetracenomycin C, and three modified with 6-deoxysugars, including 8-O-d-fucosyl-tetracenomycin C, 8-O-d-allosyl-tetracenomycin C, and 8-O-d-quinovosyl-tetracenomycin C. Our work demonstrates the feasibility of BioBricks cloning, with the ability to recycle intermediate constructs, for the rapid assembly of diverse carbohydrate pathways and glycodiversification of a variety of natural products.
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Affiliation(s)
- Heli Tirkkonen
- Department
of Life Technologies, University of Turku, FIN-20014 Turku, Finland
| | - Katelyn V. Brown
- Department
of Pharmaceutical Sciences, College of Pharmacy, Ferris State University, Big Rapids, Michigan 49307, United States
| | - Magdalena Niemczura
- Department
of Life Technologies, University of Turku, FIN-20014 Turku, Finland
| | - Zélie Faudemer
- Chemistry
and Chemical Engineering Department, SIGMA
Clermont, 63170 Aubière, France
| | - Courtney Brown
- Department
of Pharmaceutical Sciences, College of Pharmacy, Ferris State University, Big Rapids, Michigan 49307, 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
| | - Yosra A. Helmy
- Department
of Veterinary Science, College of Agriculture, Food, and Environment, University of Kentucky, Lexington, Kentucky 40546, 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
| | - S. Eric Nybo
- Department
of Pharmaceutical Sciences, College of Pharmacy, Ferris State University, Big Rapids, Michigan 49307, United States
| | - Mikko Metsä-Ketelä
- Department
of Life Technologies, University of Turku, FIN-20014 Turku, Finland
| | - 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
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4
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Saleem M, Hassan A, Li F, Lu Q, Ponomareva LV, Parkin S, Sun C, Thorson JS, Shaaban KA, Sajid I. Bioprospecting of desert actinobacteria with special emphases on griseoviridin, mitomycin C and a new bacterial metabolite producing Streptomyces sp. PU-KB10-4. BMC Microbiol 2023; 23:69. [PMID: 36922786 PMCID: PMC10015687 DOI: 10.1186/s12866-023-02770-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 01/11/2023] [Indexed: 03/18/2023] Open
Abstract
BACKGROUND Bioprospecting of actinobacteria isolated from Kubuqi desert, China for antibacterial, antifungal and cytotoxic metabolites production and their structure elucidation. RESULTS A total of 100 actinobacteria strains were selectively isolated from Kubuqi desert, Inner Mongolia, China. The taxonomic characterization revealed Streptomyces as the predominant genus comprising 37 different species, along with the rare actinobacterial genus Lentzea. The methanolic extracts of 60.8% of strains exhibited potent antimicrobial activities against Staphylococcus aureus, Micrococcus luteus, Bacillus subtilis, Escherichia coli, Salmonella enterica, Saccharomyces cerevisiae and high to mild in vitro cytotoxicity against PC3 (prostate cancer) and A549 (lung carcinoma) cell lines. The metabolomics analysis by TLC, HPLC-UV/vis, HPLC-MS and NMR showed the presence of compounds with molecular weights ranging from 100 to 1000 Da. The scale-up fermentation of the prioritized anti-Gram-negative strain PU-KB10-4 (Streptomyces griseoviridis), yielded three pure compounds including; griseoviridin (1; 42.0 mgL- 1) with 20 fold increased production as compared to previous reports and its crystal structure as monohydrate form is herein reported for the first time, mitomycin C (2; 0.3 mgL- 1) and a new bacterial metabolite 4-hydroxycinnamide (3; 0.59 mgL- 1). CONCLUSIONS This is the first report of the bioprospecting and exploration of actinobacteria from Kubuqi desert and the metabolite 4-hydroxycinnamide (3) is first time isolated from a bacterial source. This study demonstrated that actinobacteria from Kubuqi desert are a potential source of novel bioactive natural products. Underexplored harsh environments like the Kubuqi desert may harbor a wider diversity of actinobacteria, particularly Streptomyces, which produce unique metabolites and are an intriguing source to develop medicinally valuable natural products.
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Affiliation(s)
- Maira Saleem
- Institute of Microbiology and Molecular Genetics (MMG), University of the Punjab, Lahore, 54590, Pakistan
- Center for Pharmaceutical Research and Innovation (CPRI), College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536, USA
| | - Ashba Hassan
- Institute of Microbiology and Molecular Genetics (MMG), University of the Punjab, Lahore, 54590, Pakistan
| | - Feina Li
- Institute of Medicinal Biotechnology (IMB), Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Qinpei Lu
- Institute of Medicinal Biotechnology (IMB), Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Larissa V Ponomareva
- Center for Pharmaceutical Research and Innovation (CPRI), College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536, USA
| | - Sean Parkin
- Department of Chemistry, University of Kentucky, Lexington, Kentucky, 40506, USA
| | - Chenghang Sun
- Institute of Medicinal Biotechnology (IMB), Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Jon S Thorson
- Center for Pharmaceutical Research and Innovation (CPRI), College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536, USA
| | - Khaled A Shaaban
- Center for Pharmaceutical Research and Innovation (CPRI), College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536, USA.
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536, USA.
| | - Imran Sajid
- Institute of Microbiology and Molecular Genetics (MMG), University of the Punjab, Lahore, 54590, Pakistan.
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5
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Bhardwaj M, Cui Z, Daniel Hankore E, Moonschi FH, Saghaeiannejad Esfahani H, Kalkreuter E, Gui C, Yang D, Phillips GN, Thorson JS, Shen B, Van Lanen SG. A discrete intermediate for the biosynthesis of both the enediyne core and the anthraquinone moiety of enediyne natural products. Proc Natl Acad Sci U S A 2023; 120:e2220468120. [PMID: 36802426 PMCID: PMC9992847 DOI: 10.1073/pnas.2220468120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 01/30/2023] [Indexed: 02/23/2023] Open
Abstract
The enediynes are structurally characterized by a 1,5-diyne-3-ene motif within a 9- or 10-membered enediyne core. The anthraquinone-fused enediynes (AFEs) are a subclass of 10-membered enediynes that contain an anthraquinone moiety fused to the enediyne core as exemplified by dynemicins and tiancimycins. A conserved iterative type I polyketide synthase (PKSE) is known to initiate the biosynthesis of all enediyne cores, and evidence has recently been reported to suggest that the anthraquinone moiety also originates from the PKSE product. However, the identity of the PKSE product that is converted to the enediyne core or anthraquinone moiety has not been established. Here, we report the utilization of recombinant E. coli coexpressing various combinations of genes that encode a PKSE and a thioesterase (TE) from either 9- or 10-membered enediyne biosynthetic gene clusters to chemically complement ΔPKSE mutant strains of the producers of dynemicins and tiancimycins. Additionally, 13C-labeling experiments were performed to track the fate of the PKSE/TE product in the ΔPKSE mutants. These studies reveal that 1,3,5,7,9,11,13-pentadecaheptaene is the nascent, discrete product of the PKSE/TE that is converted to the enediyne core. Furthermore, a second molecule of 1,3,5,7,9,11,13-pentadecaheptaene is demonstrated to serve as the precursor of the anthraquinone moiety. The results establish a unified biosynthetic paradigm for AFEs, solidify an unprecedented biosynthetic logic for aromatic polyketides, and have implications for the biosynthesis of not only AFEs but all enediynes.
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Affiliation(s)
- Minakshi Bhardwaj
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY40536
| | - Zheng Cui
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY40536
| | - Erome Daniel Hankore
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY40536
| | - Faruk H. Moonschi
- Department of Physiology, College of Medicine, University of Kentucky, Lexington, KY40536
| | - Hoda Saghaeiannejad Esfahani
- Department of Microbiology, Immunology and Molecular Genetics, College of Medicine, University of Kentucky, Lexington, KY40536
| | - Edward Kalkreuter
- Department of Chemistry, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, Jupiter, FL33458
| | - Chun Gui
- Department of Chemistry, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, Jupiter, FL33458
| | - Dong Yang
- Department of Chemistry, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, Jupiter, FL33458
- Natural Products Discovery Center, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, Jupiter, FL33458
| | | | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY40536
| | - Ben Shen
- Department of Chemistry, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, Jupiter, FL33458
- Natural Products Discovery Center, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, Jupiter, FL33458
- Department of Molecular Medicine, The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, Jupiter, FL33458
- Skaggs Graduate School of Chemical and Biological Sciences, Scripps Research, Jupiter, FL33458
| | - Steven G. Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY40536
- Department of Microbiology, Immunology and Molecular Genetics, College of Medicine, University of Kentucky, Lexington, KY40536
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6
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Wang R, Nguyen J, Hecht J, Schwartz N, Brown KV, Ponomareva LV, Niemczura M, van Dissel D, van Wezel GP, Thorson JS, Metsä-Ketelä M, Shaaban KA, Nybo SE. A BioBricks Metabolic Engineering Platform for the Biosynthesis of Anthracyclinones in Streptomyces coelicolor. ACS Synth Biol 2022; 11:4193-4209. [PMID: 36378506 PMCID: PMC9764417 DOI: 10.1021/acssynbio.2c00498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Actinomycetes produce a variety of clinically indispensable molecules, such as antineoplastic anthracyclines. However, the actinomycetes are hindered in their further development as genetically engineered hosts for the synthesis of new anthracycline analogues due to their slow growth kinetics associated with their mycelial life cycle and the lack of a comprehensive genetic toolbox for combinatorial biosynthesis. In this report, we tackled both issues via the development of the BIOPOLYMER (BIOBricks POLYketide Metabolic EngineeRing) toolbox: a comprehensive synthetic biology toolbox consisting of engineered strains, promoters, vectors, and biosynthetic genes for the synthesis of anthracyclinones. An improved derivative of the production host Streptomyces coelicolor M1152 was created by deleting the matAB gene cluster that specifies extracellular poly-β-1,6-N-acetylglucosamine (PNAG). This resulted in a loss of mycelial aggregation, with improved biomass accumulation and anthracyclinone production. We then leveraged BIOPOLYMER to engineer four distinct anthracyclinone pathways, identifying optimal combinations of promoters, genes, and vectors to produce aklavinone, 9-epi-aklavinone, auramycinone, and nogalamycinone at titers between 15-20 mg/L. Optimization of nogalamycinone production strains resulted in titers of 103 mg/L. We structurally characterized six anthracyclinone products from fermentations, including new compounds 9,10-seco-7-deoxy-nogalamycinone and 4-O-β-d-glucosyl-nogalamycinone. Lastly, we tested the antiproliferative activity of the anthracyclinones in a mammalian cancer cell viability assay, in which nogalamycinone, auramycinone, and aklavinone exhibited moderate cytotoxicity against several cancer cell lines. We envision that BIOPOLYMER will serve as a foundational platform technology for the synthesis of designer anthracycline analogues.
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Affiliation(s)
- Rongbin Wang
- Department
of Life Technologies, University of Turku, FIN-20014 Turku, Finland
| | - Jennifer Nguyen
- Department
of Pharmaceutical Sciences, College of Pharmacy, Ferris State University, Big Rapids, Michigan 49307, United States
| | - Jacob Hecht
- Department
of Pharmaceutical Sciences, College of Pharmacy, Ferris State University, Big Rapids, Michigan 49307, United States
| | - Nora Schwartz
- Department
of Pharmaceutical Sciences, College of Pharmacy, Ferris State University, Big Rapids, Michigan 49307, United States
| | - Katelyn V. Brown
- Department
of Pharmaceutical Sciences, College of Pharmacy, Ferris State University, Big Rapids, Michigan 49307, United States
| | - Larissa V. Ponomareva
- §Center for Pharmaceutical
Research and Innovation, ∥Department of Pharmaceutical Sciences,
College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Magdalena Niemczura
- Department
of Life Technologies, University of Turku, FIN-20014 Turku, Finland
| | - Dino van Dissel
- Institute
of Biology, Leiden University, Sylviusweg 72, 2333
BE Leiden, The Netherlands,Department
of Biotechnology and Nanomedicine, SINTEF
AS, P.O. Box 4760 Torgarden, NO-7465 Trondheim, Norway
| | - Gilles P. van Wezel
- Institute
of Biology, Leiden University, Sylviusweg 72, 2333
BE Leiden, The Netherlands
| | - Jon S. Thorson
- §Center for Pharmaceutical
Research and Innovation, ∥Department of Pharmaceutical Sciences,
College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Mikko Metsä-Ketelä
- Department
of Life Technologies, University of Turku, FIN-20014 Turku, Finland,
| | - Khaled A. Shaaban
- §Center for Pharmaceutical
Research and Innovation, ∥Department of Pharmaceutical Sciences,
College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States,
| | - S. Eric Nybo
- Department
of Pharmaceutical Sciences, College of Pharmacy, Ferris State University, Big Rapids, Michigan 49307, United States,
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7
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Hower JC, Fiket Ž, Henke KR, Hiett JK, Thorson JS, Kharel M, Dai S, Silva LFO, Oliveira MLS. Soils and spoils: mineralogy and geochemistry of mining and processing wastes from lead and zinc mining at the Gratz Mine, Owen County, Kentucky. J Soils Sediments 2022; 22:1773-1786. [PMID: 37475891 PMCID: PMC10358743 DOI: 10.1007/s11368-022-03171-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 02/18/2022] [Indexed: 07/22/2023]
Abstract
Purpose Mineralogical and geochemical features of mining and processing wastes collected in Owen County, part of the Central Kentucky Lead-Zinc district, were investigated. The Gratz mine, abandoned in the 1940s, is on a dairy farm. Aside from discerning the nature of mining refuse at the site, the investigation was part of the University of Kentucky College of Pharmacy's mission to explore unusual environments in the search for unique microbiological communities. Materials and methods Four samples of a soil-plus-spoils mix were collected from spoil piles and two samples, the sluice and coarse samples, were closely associated with the site of the ore processing. Optical petrology (polarized reflected-light, oil-immersion optics at a final magnification of 500 ×), X-ray diffraction, X-ray fluorescence, inductively coupled plasma mass spectrometry, field emission scanning electron microscopy (FE-SEM), and high-resolution transmission electron microscope (HR-TEM) with selected area electron diffraction (SAED) and/or microbeam diffraction (MBD), scanning transmission electron microscopy (STEM), and energy-dispersive X-ray spectrometer (EDS) analyses were employed to characterize the samples. Results and discussion Calcite is the main mineral in most samples, followed by near equal amounts of quartz and dolomite. Sphalerite and galena are the principal sulfides and barite is the dominant sulfate. Geochemistry of major elements reflected the mineralogy, whereas trace elements showed different groupings between the minerals. Scandium, Cu, Ga, Ge, Cd, and Sb were found predominantly associated with Zn and Pb and sulfide minerals; Bi, Hf, In, Sn, and Zr with heavy mineral fraction; while the remaining trace elements, including the rare earths, were mostly distributed among other present phases, i.e., oxyhalides, oxides, silicates, and carbonaceous material. The data were used to illustrate the processes and conditions that control the sulfide-mineral oxidation and its potential for the environmental release of associated reaction products. Conclusions The wastes represent a potential source of environmentally disruptive concentrations of Zn, Pb, and other sulfide-associated elements. The high share of carbonates suggests near-neutral conditions in deposited wastes, restricting sulfide weathering and further limiting the oxidant activity of Fe. The low-Fe content and its predominant presence in highly resistant hematite also constrain sulfide weathering. Consequently, the spoils have a low potential for generation of acidity and release of heavy metal(loid)s in the surrounding environment.
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Affiliation(s)
- James C. Hower
- Center for Applied Energy Research, University of Kentucky, 2540 Research Park Drive, Lexington, KY 40511, USA
- Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY 40506, USA
| | - Željka Fiket
- Division for Marine and Environmental Research, Laboratory of Inorganic Environmental Geochemistry and Chemodynamics of Nanoparticles, Ruđer Bošković Institute, Zagreb, Croatia
| | - Kevin R. Henke
- Center for Applied Energy Research, University of Kentucky, 2540 Research Park Drive, Lexington, KY 40511, USA
- Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY 40506, USA
| | - John K. Hiett
- Center for Applied Energy Research, University of Kentucky, 2540 Research Park Drive, Lexington, KY 40511, USA
- Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY 40506, USA
- Kentucky Ofce of Mine Safety and Licensing, 1025 Capital Center Drive, Frankfort, KY 40601, USA
| | - Jon S. Thorson
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, KY 40506, USA
| | - Madan Kharel
- Department of Pharmaceutical Sciences, University of Kentucky, Lexington, KY 40506, USA
- School of Pharmacy, University of Maryland – Eastern Shore, Princess Anne, MD 21853, USA
| | - Shifeng Dai
- State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing, China
- School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
| | - Luis F. O. Silva
- Department of Civil and Environmental, Universidad de La Costa, CUC, Universitaria de La Costa, Calle 58 # 55e66, Soledad, Barranquilla, Atlático, Colombia
| | - Marcos L. S. Oliveira
- Department of Civil and Environmental, Universidad de La Costa, CUC, Universitaria de La Costa, Calle 58 # 55e66, Soledad, Barranquilla, Atlático, Colombia
- Faculdade Meridional IMED, Passo Fundo, RS 99070-220, Brazil
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8
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Mahmoud MM, Abdel-Razek AS, Soliman HS, Ponomareva LV, Thorson JS, Shaaban KA, Shaaban M. Diverse polyketides from the marine endophytic Alternaria sp . LV52: Structure determination and cytotoxic activities. Biotechnol Rep (Amst) 2022; 33:e00628. [PMID: 35036335 PMCID: PMC8752877 DOI: 10.1016/j.btre.2021.e00628] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 04/29/2021] [Accepted: 05/09/2021] [Indexed: 12/02/2022]
Abstract
We report the isolation and characterization of five polyketides [alternariol (1), alternariol-9-methyl ether (2), altertoxin I (3), altertoxin II (4) and tenuazonic acid (5)] from the marine endophytic Alternaria sp. LV52 derived from Cystoseira tamariscifolia, collected from the Red Sea at Nabq-Bay, Egypt. The chemical structures of compounds 1-5 were identified by extensive 1D, 2D NMR, and HR mass measurements. Isolation and phenotypic and genotypic characterization of the producing fungus is reported. The antimicrobial activity of the produced extract and derived compounds was examined against a panel of test organisms. In addition, an in vitro cytotoxic activity of 1-5 was performed against diverse cancer cell lines: HEPG2, HELA, A549 and PC3, revealing that compounds 2 and 4 are potentially cytotoxic against A549 and PC3 with EC50 of 0.73 µg/ml (2.69 µM) and 0.17 µg/ml (0.64 µM) for 2, and 0.40 µg/ml (1.15 µM) and 0.12 µg/ml (0.33 µM) for 4, respectively.
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Affiliation(s)
- Manar M. Mahmoud
- Pharmacognosy Department, Faculty of Pharmacy, Helwan University, Helwan City-Cairo 11884, Egypt
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, d-33501 Bielefeld, Germany
| | - Ahmed S. Abdel-Razek
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, d-33501 Bielefeld, Germany
- Microbial Chemistry Department, Division of Genetic Engineering and Biotechnology Research, National Research Centre, El-Buhouth St. 33, Dokki-Cairo 12622, Egypt
| | - Hesham S.M. Soliman
- Pharmacognosy Department, Faculty of Pharmacy, Helwan University, Helwan City-Cairo 11884, Egypt
- Pharm D program, Egypt-Japan University of Science and Technology (E-JUST), New Borg El-Arab City, 21934 Alexandria, Egypt
| | - Larissa V. Ponomareva
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Jon S. Thorson
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Khaled A. Shaaban
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Mohamed Shaaban
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, d-33501 Bielefeld, Germany
- Chemistry of Natural Compounds Department, Division of Pharmaceutical Industries, National Research Centre, El-Buhouth St. 33, Dokki-Cairo 12622, Egypt
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9
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Kosgei AJ, Miller MD, Bhardwaj M, Xu W, Thorson JS, Van Lanen SG, Phillips GN. The crystal structure of DynF from the dynemicin-biosynthesis pathway of Micromonospora chersina. Acta Crystallogr F Struct Biol Commun 2022; 78:1-7. [PMID: 34981769 PMCID: PMC8725005 DOI: 10.1107/s2053230x21012322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 11/21/2021] [Indexed: 11/17/2022] Open
Abstract
The crystal structure of DynF was determined to a resolution of 1.50 Å, revealing a dimeric eight-stranded β-barrel structure with palmitic acid bound in the interior. Dynemicin is an enediyne natural product from Micromonospora chersina ATCC53710. Access to the biosynthetic gene cluster of dynemicin has enabled the in vitro study of gene products within the cluster to decipher their roles in assembling this unique molecule. This paper reports the crystal structure of DynF, the gene product of one of the genes within the biosynthetic gene cluster of dynemicin. DynF is revealed to be a dimeric eight-stranded β-barrel structure with palmitic acid bound within a cavity. The presence of palmitic acid suggests that DynF may be involved in binding the precursor polyene heptaene, which is central to the synthesis of the ten-membered ring of the enediyne core.
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10
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Voss SR, Smith JJ, Cecil RF, Kabangu M, Duerr TJ, Monaghan JR, Timoshevskaya N, Ponomareva LV, Thorson JS, Veliz-Cuba A, Murrugarra D. HDAC Inhibitor Titration of Transcription and Axolotl Tail Regeneration. Front Cell Dev Biol 2021; 9:767377. [PMID: 35036404 PMCID: PMC8759488 DOI: 10.3389/fcell.2021.767377] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 11/29/2021] [Indexed: 11/13/2022] Open
Abstract
New patterns of gene expression are enacted and regulated during tissue regeneration. Histone deacetylases (HDACs) regulate gene expression by removing acetylated lysine residues from histones and proteins that function directly or indirectly in transcriptional regulation. Previously we showed that romidepsin, an FDA-approved HDAC inhibitor, potently blocks axolotl embryo tail regeneration by altering initial transcriptional responses to injury. Here, we report on the concentration-dependent effect of romidepsin on transcription and regeneration outcome, introducing an experimental and conceptual framework for investigating small molecule mechanisms of action. A range of romidepsin concentrations (0-10 μM) were administered from 0 to 6 or 0 to 12 h post amputation (HPA) and distal tail tip tissue was collected for gene expression analysis. Above a threshold concentration, romidepsin potently inhibited regeneration. Sigmoidal and biphasic transcription response curve modeling identified genes with inflection points aligning to the threshold concentration defining regenerative failure verses success. Regeneration inhibitory concentrations of romidepsin increased and decreased the expression of key genes. Genes that associate with oxidative stress, negative regulation of cell signaling, negative regulation of cell cycle progression, and cellular differentiation were increased, while genes that are typically up-regulated during appendage regeneration were decreased, including genes expressed by fibroblast-like progenitor cells. Using single-nuclei RNA-Seq at 6 HPA, we found that key genes were altered by romidepin in the same direction across multiple cell types. Our results implicate HDAC activity as a transcriptional mechanism that operates across cell types to regulate the alternative expression of genes that associate with regenerative success versus failure outcomes.
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Affiliation(s)
- S. Randal Voss
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, United States
| | - Jeramiah J. Smith
- Department of Biology, University of Kentucky, Lexington, KY, United States
| | - Raissa F. Cecil
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, United States
| | - Mirindi Kabangu
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, United States
| | - Timothy J. Duerr
- Department of Biology and Institute for Chemical Imaging of Living Systems, Northeastern University, Boston, MA, United States
| | - James R. Monaghan
- Department of Biology and Institute for Chemical Imaging of Living Systems, Northeastern University, Boston, MA, United States
| | | | - Larissa V. Ponomareva
- College of Pharmacy and Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, United States
| | - Jon S. Thorson
- College of Pharmacy and Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, United States
| | - Alan Veliz-Cuba
- Department of Mathematics, University of Dayton, Dayton, OH, United States
| | - David Murrugarra
- Department of Mathematics, University of Kentucky, Lexington, KY, United States
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11
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Clinger JA, Zhang Y, Liu Y, Miller MD, Hall RE, Van Lanen SG, Phillips Jr. GN, Thorson JS, Elshahawi SI. Structure and Function of a Dual Reductase-Dehydratase Enzyme System Involved in p-Terphenyl Biosynthesis. ACS Chem Biol 2021; 16:2816-2824. [PMID: 34763417 DOI: 10.1021/acschembio.1c00701] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We report the identification of the ter gene cluster responsible for the formation of the p-terphenyl derivatives terfestatins B and C and echoside B from the Appalachian Streptomyces strain RM-5-8. We characterize the function of TerB/C, catalysts that work together as a dual enzyme system in the biosynthesis of natural terphenyls. TerB acts as a reductase and TerC as a dehydratase to enable the conversion of polyporic acid to a terphenyl triol intermediate. X-ray crystallography of the apo and substrate-bound forms for both enzymes provides additional mechanistic insights. Validation of the TerC structural model via mutagenesis highlights a critical role of arginine 143 and aspartate 173 in catalysis. Cumulatively, this work highlights a set of enzymes acting in harmony to control and direct reactive intermediates and advances fundamental understanding of the previously unresolved early steps in terphenyl biosynthesis.
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Affiliation(s)
- Jonathan A. Clinger
- Department of Biosciences, Rice University, Houston, Texas 77005, United States
| | - Yinan Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
| | - Yang Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Mitchell D. Miller
- Department of Biosciences, Rice University, Houston, Texas 77005, United States
| | - Ronnie E. Hall
- Department of Biosciences, Rice University, Houston, Texas 77005, United States
| | - Steven G. Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - George N. Phillips Jr.
- Department of Biosciences, Rice University, Houston, Texas 77005, United States
- Department of Chemistry, Rice University, Houston, Texas 77005, United States
| | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Sherif I. Elshahawi
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California 92618, United States
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12
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Cui Z, Nguyen H, Bhardwaj M, Wang X, Büschleb M, Lemke A, Schütz C, Rohrbacher C, Junghanns P, Koppermann S, Ducho C, Thorson JS, Van Lanen SG. Enzymatic C β-H Functionalization of l-Arg and l-Leu in Nonribosomally Derived Peptidyl Natural Products: A Tale of Two Oxidoreductases. J Am Chem Soc 2021; 143:19425-19437. [PMID: 34767710 DOI: 10.1021/jacs.1c08177] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Muraymycins are peptidyl nucleoside antibiotics that contain two Cβ-modified amino acids, (2S,3S)-capreomycidine and (2S,3S)-β-OH-Leu. The former is also a component of chymostatins, which are aldehyde-containing peptidic protease inhibitors that─like muraymycin─are derived from nonribosomal peptide synthetases (NRPSs). Using feeding experiments and in vitro characterization of 12 recombinant proteins, the biosynthetic mechanism for both nonproteinogenic amino acids is now defined. The formation of (2S,3S)-capreomycidine is shown to involve an FAD-dependent dehydrogenase:cyclase that requires an NRPS-bound pathway intermediate as a substrate. This cryptic dehydrogenation strategy is both temporally and mechanistically distinct in comparison to the biosynthesis of other capreomycidine diastereomers, which has previously been shown to proceed by Cβ-hydroxylation of free l-Arg catalyzed by a member of the nonheme Fe2+- and α-ketoglutarate (αKG)-dependent dioxygenase family and (eventually) a dehydration-mediated cyclization process catalyzed by a distinct enzyme(s). Contrary to our initial expectation, the sole nonheme Fe2+- and αKG-dependent dioxygenase candidate Mur15 encoded within the muraymycin gene cluster is instead demonstrated to catalyze specific Cβ hydroxylation of the Leu residue to generate (2S,3S)-β-OH-Leu that is found in most muraymycin congeners. Importantly, and in contrast to known l-Arg-Cβ-hydroxylases, the Mur15-catalyzed reaction occurs after the NRPS-mediated assembly of the peptide scaffold. This late-stage functionalization affords the opportunity to exploit Mur15 as a biocatalyst, proof of concept of which is provided.
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Affiliation(s)
- Zheng Cui
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Han Nguyen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Minakshi Bhardwaj
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Xiachang Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Martin Büschleb
- Department of Chemistry, Institute of Organic and Biomolecular Chemistry, Georg-August-University, GöTammannstr. 2, 37077 Göttingen, Germany
| | - Anke Lemke
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2 3, 66123 Saarbrücken, Germany
| | - Christian Schütz
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2 3, 66123 Saarbrücken, Germany
| | - Christian Rohrbacher
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2 3, 66123 Saarbrücken, Germany
| | - Pierre Junghanns
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2 3, 66123 Saarbrücken, Germany
| | - Stefan Koppermann
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2 3, 66123 Saarbrücken, Germany
| | - Christian Ducho
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2 3, 66123 Saarbrücken, Germany
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Steven G Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
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13
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Alvarado SK, Miller MD, Bhardwaj M, Thorson JS, Van Lanen SG, Phillips GN. Structural characterization of DynU16, a START/Bet v1-like protein involved in dynemicin biosynthesis. Acta Crystallogr F Struct Biol Commun 2021; 77:328-333. [PMID: 34605436 PMCID: PMC8488855 DOI: 10.1107/s2053230x21008943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 08/27/2021] [Indexed: 11/10/2022] Open
Abstract
The 1.5 Å resolution crystal structure of DynU16, a protein identified in the dynemicin-biosynthetic gene cluster, is reported. The structure adopts a di-domain helix-grip fold with a uniquely positioned open cavity connecting the domains. The elongated dimensions of the cavity appear to be compatible with the geometry of a linear polyene, suggesting the involvement of DynU16 in the upstream steps of dynemicin biosynthesis.
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Affiliation(s)
- Sarah K. Alvarado
- Department of BioSciences, Rice University, 6100 Main Street, Houston, TX 77005, USA
| | - Mitchell D. Miller
- Department of BioSciences, Rice University, 6100 Main Street, Houston, TX 77005, USA
| | - Minakshi Bhardwaj
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA
| | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA
| | - Steven G. Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA
| | - George N. Phillips
- Department of BioSciences, Rice University, 6100 Main Street, Houston, TX 77005, USA
- Department of Chemistry, Rice University, 6100 Main Street, Houston, TX 77005, USA
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14
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Iantas J, Savi DC, Schibelbein RDS, Noriler SA, Assad BM, Dilarri G, Ferreira H, Rohr J, Thorson JS, Shaaban KA, Glienke C. Endophytes of Brazilian Medicinal Plants With Activity Against Phytopathogens. Front Microbiol 2021; 12:714750. [PMID: 34539608 PMCID: PMC8442585 DOI: 10.3389/fmicb.2021.714750] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 08/03/2021] [Indexed: 12/14/2022] Open
Abstract
Plant diseases caused by phytopathogens are responsible for significant crop losses worldwide. Resistance induction and biological control have been exploited in agriculture due to their enormous potential. In this study, we investigated the antimicrobial potential of endophytic fungi of leaves and petioles of medicinal plants Vochysia divergens and Stryphnodendron adstringens located in two regions of high diversity in Brazil, Pantanal, and Cerrado, respectively. We recovered 1,304 fungal isolates and based on the characteristics of the culture, were assigned to 159 phenotypes. One isolate was selected as representative of each phenotype and studied for antimicrobial activity against phytopathogens. Isolates with better biological activities were identified based on DNA sequences and phylogenetic analyzes. Among the 159 representative isolates, extracts from 12 endophytes that inhibited the mycelial growth (IG) of Colletotrichum abscissum (≥40%) were selected to expand the antimicrobial analysis. The minimum inhibitory concentrations (MIC) of the extracts were determined against citrus pathogens, C. abscissum, Phyllosticta citricarpa and Xanthomonas citri subsp. citri and the maize pathogen Fusarium graminearum. The highest activity against C. abscissum were from extracts of Pseudofusicoccum stromaticum CMRP4328 (IG: 83% and MIC: 40 μg/mL) and Diaporthe vochysiae CMRP4322 (IG: 75% and MIC: 1 μg/mL), both extracts also inhibited the development of post-bloom fruit drop symptoms in citrus flowers. The extracts were promising in inhibiting the mycelial growth of P. citricarpa and reducing the production of pycnidia in citrus leaves. Among the isolates that showed activity, the genus Diaporthe was the most common, including the new species D. cerradensis described in this study. In addition, high performance liquid chromatography, UV detection, and mass spectrometry and thin layer chromatography analyzes of extracts produced by endophytes that showed high activity, indicated D. vochysiae CMRP4322 and P. stromaticum CMRP4328 as promising strains that produce new bioactive natural products. We report here the capacity of endophytic fungi of medicinal plants to produce secondary metabolites with biological activities against phytopathogenic fungi and bacteria. The description of the new species D. cerradensis, reinforces the ability of medicinal plants found in Brazil to host a diverse group of fungi with biotechnological potential.
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Affiliation(s)
- Jucélia Iantas
- Postgraduate Program of Microbiology, Parasitology and Pathology, Department of Pathology, Federal University of Paraná, Curitiba, Brazil
| | - Daiani Cristina Savi
- Department of Biomedicine, Centro Universitário Católica de Santa Catarina, Joinville, Brazil
- Postgraduate Program of Genetics, Federal University of Paraná, Curitiba, Brazil
| | - Renata da Silva Schibelbein
- Postgraduate Program of Microbiology, Parasitology and Pathology, Department of Pathology, Federal University of Paraná, Curitiba, Brazil
| | - Sandriele Aparecida Noriler
- Postgraduate Program of Microbiology, Parasitology and Pathology, Department of Pathology, Federal University of Paraná, Curitiba, Brazil
| | | | - Guilherme Dilarri
- Department of General and Applied Biology, Biosciences Institute, State University of São Paulo, Rio Claro, Brazil
| | - Henrique Ferreira
- Department of General and Applied Biology, Biosciences Institute, State University of São Paulo, Rio Claro, Brazil
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, United States
| | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, United States
| | - Khaled A. Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, United States
| | - Chirlei Glienke
- Postgraduate Program of Microbiology, Parasitology and Pathology, Department of Pathology, Federal University of Paraná, Curitiba, Brazil
- Postgraduate Program of Genetics, Federal University of Paraná, Curitiba, Brazil
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15
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Cheema MT, Ponomareva LV, Liu T, Voss SR, Thorson JS, Shaaban KA, Sajid I. Taxonomic and Metabolomics Profiling of Actinobacteria Strains from Himalayan Collection Sites in Pakistan. Curr Microbiol 2021; 78:3044-3057. [PMID: 34125273 PMCID: PMC10716794 DOI: 10.1007/s00284-021-02557-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 05/28/2021] [Indexed: 01/08/2023]
Abstract
Actinobacteria have proven themselves as the major producers of bioactive compounds with wide applications. In this study, 35 actinobacteria strains were isolated from soil samples collected from the Himalayan mountains region in Pakistan. The isolated strains were identified by polyphasic taxonomy and were prioritized based on biological and chemical screening to identify the strains with ability to produce inimitable metabolites. The biological screening included antimicrobial activity against Staphylococcus aureus, Micrococcus luteus, Salmonella enterica, Escherichia coli, Mycobacterium aurum, and Bacillus subtilis and anticancer activity using human cancer cell lines PC3 and A549. For chemical screening, methanolic extracts were investigated using TLC, HPLC-UV/MS. The actinobacteria strain PU-MM93 was selected for scale-up fermentation based on its unique chemical profile and cytotoxicity (50-60% growth inhibition) against PC3 and A549 cell lines. The scale-up fermentation of PU-MM93, followed by purification and structure elucidation of compounds revealed this strain as a promising producer of the cytotoxic anthracycline aranciamycin and aglycone SM-173-B along with the potent neuroprotective carboxamide oxachelin C. Other interesting metabolites produced include taurocholic acid as first report herein from microbial origin, pactamycate and cyclo(L-Pro-L-Leu). The study suggested exploring more bioactive microorganisms from the untapped Himalayan region in Pakistan, which can produce commercially significant compounds.
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Affiliation(s)
- Mohsin T Cheema
- Institute of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Larissa V Ponomareva
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Tao Liu
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
- Department of Natural Products Chemistry, School of Pharmacy, China Medical University, Shenyang, 110122, China
| | - S Randal Voss
- Department of Neuroscience, University of Kentucky, Lexington, KY, 40536, USA
- Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40536, USA
- Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, KY, 40536, USA
| | - Jon S Thorson
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Khaled A Shaaban
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA.
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA.
| | - Imran Sajid
- Institute of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan.
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16
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Zhang Y, Cheema MT, Ponomareva LV, Ye Q, Liu T, Sajid I, Rohr J, She QB, Voss SR, Thorson JS, Shaaban KA. Himalaquinones A-G, Angucyclinone-Derived Metabolites Produced by the Himalayan Isolate Streptomyces sp. PU-MM59. J Nat Prod 2021; 84:1930-1940. [PMID: 34170698 PMCID: PMC8565601 DOI: 10.1021/acs.jnatprod.1c00192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Himalaquinones A-G, seven new anthraquinone-derived metabolites, were obtained from the Himalayan-based Streptomyces sp. PU-MM59. The chemical structures of the new compounds were identified based on cumulative analyses of HRESIMS and NMR spectra. Himalaquinones A-F were determined to be unique anthraquinones that contained unusual C-4a 3-methylbut-3-enoic acid aromatic substitutions, while himalaquinone G was identified as a new 5,6-dihydrodiol-bearing angucyclinone. Comparative bioactivity assessment (antimicrobial, cancer cell line cytotoxicity, impact on 4E-BP1 phosphorylation, and effect on axolotl embryo tail regeneration) revealed cytotoxic landomycin and saquayamycin analogues to inhibit 4E-BP1p and inhibit regeneration. In contrast, himalaquinone G, while also cytotoxic and a regeneration inhibitor, did not affect 4E-BP1p status at the doses tested. As such, this work implicates a unique mechanism for himalaquinone G and possibly other 5,6-dihydrodiol-bearing angucyclinones.
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Affiliation(s)
- Yongyong Zhang
- Department of Pharmacy, College of Life Sciences, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Mohsin T Cheema
- Institute of Microbiology and Molecular Genetics (MMG), University of the Punjab, Lahore 54590, Pakistan
| | | | - Qing Ye
- Markey Cancer Center, Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Tao Liu
- Department of Natural Products Chemistry, School of Pharmacy, China Medical University, Shenyang 110122, People's Republic of China
| | - Imran Sajid
- Institute of Microbiology and Molecular Genetics (MMG), University of the Punjab, Lahore 54590, Pakistan
| | | | - Qing-Bai She
- Markey Cancer Center, Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
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17
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Rivas JR, Alhakeem SS, Liu Y, Eckenrode JM, Collard JP, Zhang Y, Shaaban KA, Muthusamy N, Hildebrandt GC, Fleischman RA, Chen L, Thorson JS, Leggas M, Bondada S. Interleukin-10 suppression enhances CD8+ T cell responses to checkpoint blockade immunotherapy in Chronic Lymphocytic Leukemia. The Journal of Immunology 2021. [DOI: 10.4049/jimmunol.206.supp.67.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Abstract
T-cell-based immunotherapy revolutionized the treatment of immune suppressive cancers. Blocking T cell inhibitory receptors such as programmed death 1 (PD1) or their ligands (like PD-L1) enhances antitumor T cell responses. However, many cancers employ multiple methods of immune suppression, including the production of potent regulatory cytokines like Interleukin-10 (IL-10). B cell Chronic Lymphocytic Leukemia (CLL) is one such B cell malignancy that elicits widespread immune dysfunction including numerous functional deficits in T cells. Human and mouse CLL cells (Eμ-Tcl1) produce IL-10 and PD-L1, which dampen antitumor immunity. Since immune checkpoint blockade experienced limited success in CLL, we investigated IL-10 suppression as a novel combination therapy. Exogenous and CLL-derived IL-10 decreased human and mouse T cell functionality in vitro. Further, CLL-derived IL-10 can be blocked with antibodies or can be reduced with small molecule inhibitors to improve CD8+ T cell functionality in vivo. CLL IL-10 production depends on the transcription factor Sp1. Hence, we utilized a novel analogue of the Sp1 inhibitor mithramycin to reduce CLL IL-10 secretion. IL-10 inhibition improved responses to anti-PD-L1 therapy, with increased survival and decreased CLL burden compared to anti-PD-L1 alone. This method improved CD8+ T cell proliferation, effector-memory cell frequency, and interferon-γ production. CD8+ T cells were also more abundant, with fewer exhausted T cells even at very advanced stages of disease. Current cancer therapies do not target IL-10 and our studies provide evidence for targeting IL-10 to increase the efficacy of T cell immunotherapies in human CLL, and possibly other cancers with T cell suppression.
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18
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Jalali E, Thorson JS. Enzyme-mediated bioorthogonal technologies: catalysts, chemoselective reactions and recent methyltransferase applications. Curr Opin Biotechnol 2021; 69:290-298. [PMID: 33901763 DOI: 10.1016/j.copbio.2021.02.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 02/24/2021] [Accepted: 02/26/2021] [Indexed: 12/28/2022]
Abstract
Transferases have emerged as among the best catalysts for enzyme-mediated bioorthogonal functional group installation to advance innovative in vitro, cell-based and in vivo chemical biology applications. This review introduces the key considerations for selecting enzyme catalysts and chemoselective reactions most amenable to bioorthogonal platform development and highlights relevant key technology development and applications for one ubiquitous transferase subclass - methyltransferases (MTs). Within this context, recent advances in MT-enabled bioorthogonal labeling/conjugation relevant to DNA, RNA, protein, and natural products (i.e. complex small molecule metabolites) are highlighted.
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Affiliation(s)
- Elnaz Jalali
- Department of Pharmaceutical Sciences, University of Kentucky College of Pharmacy, Lexington, KY 40536, United States
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, University of Kentucky College of Pharmacy, Lexington, KY 40536, United States; Center for Pharmaceutical Research and Innovation, University of Kentucky College of Pharmacy, Lexington, KY 40536, United States.
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19
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Mahmoud MM, Abdel-Razek AS, Hamed A, Soliman HSM, Ponomareva LV, Thorson JS, Shaaban KA, Shaaban M. RF-3192C and other polyketides from the marine endophytic Aspergillus niger ASSB4: structure assignment and bioactivity investigation. Med Chem Res 2021; 30:647-654. [PMID: 38576441 PMCID: PMC10993419 DOI: 10.1007/s00044-020-02658-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 10/27/2020] [Indexed: 01/14/2023]
Abstract
Chemical investigation of the methanolic extract of endophytic Aspergillus niger SB4, isolated from the marine alga Laurencia obtuse, afforded the pentacyclic polyketide, RF-3192C (1), the dimeric coumarin orlandin (2), fonsecin B (3), TMC-256A1 (4), cyclo-(Leu-Ala) (5), and cerebroside A (6).The chemical structure of RF-3192C (1) is assigned herein for the first time using 1D/2D NMR and HRESI-MS. Additionally, the revision of the NMR assignments of orlandin (2) was reported herein as well. Investigation of the antimicrobial activities of isolated compounds revealed the high activity of RF-3192C (1) against Pseudomonas aeruginosa and Bacillus subtilis, and moderate activity against yeast. Moreover, an in vitro cytotoxic activity against liver (HEPG2), cervical (HELA), lung (A549), prostate (PC3), and breast (MCF7) cancer cell lines of the isolated compounds was evaluated. The isolation and taxonomical characterization of the producing fungus was reported as well.
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Affiliation(s)
- Manar M Mahmoud
- Pharmacognosy Department, Faculty of Pharmacy, Helwan University, Helwan, Cairo 11795, Egypt
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
| | - Ahmed S Abdel-Razek
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
- Microbial Chemistry Department, Genetic Engineering and Biotechnology Research Division, National Research Centre, El-Buhouth St. 33, Dokki-Giza 12622, Egypt
| | - Abdelaaty Hamed
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
- Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City-Cairo 11884, Egypt
| | - Hesham S M Soliman
- Pharmacognosy Department, Faculty of Pharmacy, Helwan University, Helwan, Cairo 11795, Egypt
| | - Larissa V Ponomareva
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA
| | - Jon S Thorson
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA
| | - Khaled A Shaaban
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA
| | - Mohamed Shaaban
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, D-33501 Bielefeld, Germany
- Chemistry of Natural Compounds Department, Division of Pharmaceutical Industries, National Research Centre, El-Buhouth St. 33, Dokki-Giza 12622, Egypt
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20
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Baddar NWAH, Dwaraka VB, Ponomareva LV, Thorson JS, Voss SR. Chemical genetics of regeneration: Contrasting temporal effects of CoCl
2
on axolotl tail regeneration. Dev Dyn 2021; 250:852-865. [DOI: 10.1002/dvdy.294] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Accepted: 12/19/2020] [Indexed: 12/16/2022] Open
Affiliation(s)
- Nour W. Al Haj Baddar
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center University of Kentucky Lexington Kentucky USA
| | - Varun B. Dwaraka
- Department of Biology University of Kentucky Lexington Kentucky USA
| | - Larissa V. Ponomareva
- College of Pharmacy and Center for Pharmaceutical Research and Innovation University of Kentucky Lexington Kentucky USA
| | - Jon S. Thorson
- College of Pharmacy and Center for Pharmaceutical Research and Innovation University of Kentucky Lexington Kentucky USA
| | - S. Randal Voss
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center University of Kentucky Lexington Kentucky USA
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21
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Eliwa EM, Frese M, Halawa AH, Soltan MM, Ponomareva LV, Thorson JS, Shaaban KA, Shaaban M, El-Agrody AM, Sewald N. Metal-free domino amination-Knoevenagel condensation approach to access new coumarins as potent nanomolar inhibitors of VEGFR-2 and EGFR. Green Chem Lett Rev 2021; 14:578-599. [PMID: 35821884 PMCID: PMC9273165 DOI: 10.1080/17518253.2021.1981462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A metal-free, atom-economy and simple work-up domino amination-Knoevenagel condensation approach to construct new coumarin analogous (4a-f and 8a-e) was described. Further, new formyl (5a,d-f) and nitro (9a,d-f) coumarin derivatives were synthesized via C-N coupling reaction of various cyclic secondary amines and 4-chloro-3-(formyl-/nitro)coumarins (1a,c), respectively. The confirmed compounds were screened for their in vitro anti-proliferative activity against KB-3-1, A549 and PC3 human cancer cell lines using resazurin cellular-based assay. Among them, coumarin derivatives 4e and 8e displayed the best anti-cervical cancer potency (KB-3-1) with IC50 values of 15.5 ± 3.54 and 21 ± 4.24 μM, respectively. Also, 4e showed the most promising cytotoxicity toward A549 with IC50 value of 12.94 ± 1.51 μM. As well, 9d presented a more significant impact of potency against PC3 with IC50 7.31 ± 0.48 μM. Moreover, 8d manifested selectivity against PC3 (IC50 = 20.16 ± 0.07 μM), while 8e was selective toward KB-3-1 cell line (IC50 = 21 ± 4.24 μM). Matching with docking profile, the enzymatic assay divulged that 8e is a dual potent single-digit nanomolar inhibitor of VEGFR-2 and EGFR with IC50 values of 24.67 nM and 31.6 nM that were almost equipotent to sorafenib (31.08 nM) and erlotinib (26.79 nM), respectively.
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Affiliation(s)
- Essam M. Eliwa
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, Bielefeld, Germany
- Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City-Cairo, Egypt
| | - Marcel Frese
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, Bielefeld, Germany
| | - Ahmed H. Halawa
- Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City-Cairo, Egypt
| | - Maha M. Soltan
- Biology Unit, Central Laboratory for Pharmaceutical and Drug Industries Research Division, Chemistry of Medicinal Plants Department, Pharmaceutical and Drug Industries Research Division, National Research Centre Cairo, Egypt
| | - Larissa V. Ponomareva
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, USA
| | - Jon S. Thorson
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, USA
| | - Khaled A. Shaaban
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, USA
| | - Mohamed Shaaban
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, Bielefeld, Germany
- Chemistry of Natural Compounds Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, Dokki-Cairo, Egypt
| | - Ahmed M. El-Agrody
- Chemistry Department, Faculty of Science, Al-Azhar University, Nasr City-Cairo, Egypt
| | - Norbert Sewald
- Organic and Bioorganic Chemistry, Faculty of Chemistry, Bielefeld University, Bielefeld, Germany
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22
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Liu Y, Eckenrode JM, Zhang Y, Zhang J, Hayden RC, Kyomuhangi A, Ponomareva LV, Cui Z, Rohr J, Tsodikov OV, Van Lanen SG, Shaaban KA, Leggas M, Thorson JS. Mithramycin 2'-Oximes with Improved Selectivity, Pharmacokinetics, and Ewing Sarcoma Antitumor Efficacy. J Med Chem 2020; 63:14067-14086. [PMID: 33191745 DOI: 10.1021/acs.jmedchem.0c01526] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Mithramycin A (MTM) inhibits the oncogenic transcription factor EWS-FLI1 in Ewing sarcoma, but poor pharmacokinetics (PK) and toxicity limit its clinical use. To address this limitation, we report an efficient MTM 2'-oxime (MTMox) conjugation strategy for rapid MTM diversification. Comparative cytotoxicity assays of 41 MTMox analogues using E-twenty-six (ETS) fusion-dependent and ETS fusion-independent cancer cell lines revealed improved ETS fusion-independent/dependent selectivity indices for select 2'-conjugated analogues as compared to MTM. Luciferase-based reporter assays demonstrated target engagement at low nM concentrations, and molecular assays revealed that analogues inhibit the transcriptional activity of EWS-FLI1. These in vitro screens identified MTMox32E (a Phe-Trp dipeptide-based 2'-conjugate) for in vivo testing. Relative to MTM, MTMox32E displayed an 11-fold increase in plasma exposure and improved efficacy in an Ewing sarcoma xenograft. Importantly, these studies are the first to point to simple C3 aliphatic side-chain modification of MTM as an effective strategy to improve PK.
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Affiliation(s)
- Yang Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Joseph M Eckenrode
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Yinan Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Jianjun Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Reiya C Hayden
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Annet Kyomuhangi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Larissa V Ponomareva
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Zheng Cui
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Oleg V Tsodikov
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Steven G Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Markos Leggas
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
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23
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Clinger JA, Wang X, Cai W, Zhu Y, Miller MD, Zhan CG, Van Lanen SG, Thorson JS, Phillips GN. The crystal structure of AbsH3: A putative flavin adenine dinucleotide-dependent reductase in the abyssomicin biosynthesis pathway. Proteins 2020; 89:132-137. [PMID: 32852843 DOI: 10.1002/prot.25994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 07/01/2020] [Accepted: 07/26/2020] [Indexed: 11/06/2022]
Abstract
Natural products and natural product-derived compounds have been widely used for pharmaceuticals for many years, and the search for new natural products that may have interesting activity is ongoing. Abyssomicins are natural product molecules that have antibiotic activity via inhibition of the folate synthesis pathway in microbiota. These compounds also appear to undergo a required [4 + 2] cycloaddition in their biosynthetic pathway. Here we report the structure of an flavin adenine dinucleotide-dependent reductase, AbsH3, from the biosynthetic gene cluster of novel abyssomicins found in Streptomyces sp. LC-6-2.
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Affiliation(s)
| | - Xiachang Wang
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, China.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA
| | - Wenlong Cai
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA
| | - Yanyan Zhu
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA.,Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA
| | | | - Chang-Guo Zhan
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA.,Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA
| | - Steven G Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA
| | - Jon S Thorson
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA.,Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA
| | - George N Phillips
- Department of Biosciences, Rice University, Houston, Texas, USA.,Department of Chemistry, Rice University, Houston, Texas, USA
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24
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Cui Z, Overbay J, Wang X, Liu X, Zhang Y, Bhardwaj M, Lemke A, Wiegmann D, Niro G, Thorson JS, Ducho C, Van Lanen SG. Pyridoxal-5'-phosphate-dependent alkyl transfer in nucleoside antibiotic biosynthesis. Nat Chem Biol 2020; 16:904-911. [PMID: 32483377 PMCID: PMC7377962 DOI: 10.1038/s41589-020-0548-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 04/10/2020] [Indexed: 11/09/2022]
Abstract
Several nucleoside antibiotics are structurally characterized by a 5′′-amino-5′′-deoxyribose (ADR) appended via a glycosidic bond to a high-carbon sugar nucleoside, (5′S,6′S)-5′-C-glycyluridine (GlyU). GlyU is further modified with an N-alkylamine linker, the biosynthetic origins of which have yet to be established. By using a combination of feeding experiments with isotopically labeled precursors and characterization of recombinant proteins from multiple pathways, the biosynthetic mechanism for N-alkylamine installation for ADR-GlyU-containing nucleoside antibiotics has been uncovered. The data reveal S-adenosyl-l-methionine (AdoMet) as the direct precursor of the N-alkylamine, but unlike conventional AdoMet- or decarboxylated AdoMet-dependent alkyltransferases, the reaction is catalyzed by a pyridoxal-5′-phophosate (PLP)-dependent aminobutyryltransferase (ABTase) using a stepwise γ-replacement mechanism that couples γ-elimination of AdoMet with aza-γ-addition onto the disaccharide alkyl acceptor. In addition to utilizing a conceptually different strategy for AdoMet-dependent alkylation, the newly discovered ABTases require a phosphorylated disaccharide alkyl acceptor, revealing a cryptic intermediate in the biosynthetic pathway.
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Affiliation(s)
- Zheng Cui
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Jonathan Overbay
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Xiachang Wang
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA.,Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, People's Republic of China
| | - Xiaodong Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Yinan Zhang
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA.,Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, People's Republic of China
| | - Minakshi Bhardwaj
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Anke Lemke
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Saarbrücken, Germany
| | - Daniel Wiegmann
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Saarbrücken, Germany
| | - Giuliana Niro
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Saarbrücken, Germany
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Christian Ducho
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Saarbrücken, Germany
| | - Steven G Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA.
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25
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Zhang Y, Zhang J, Ponomareva LV, Cui Z, Van Lanen SG, Thorson JS. Sugar-Pirating as an Enabling Platform for the Synthesis of 4,6-Dideoxyhexoses. J Am Chem Soc 2020; 142:9389-9395. [PMID: 32330028 DOI: 10.1021/jacs.9b13766] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
An efficient divergent synthetic strategy that leverages the natural product spectinomycin to access uniquely functionalized monosaccharides is described. Stereoselective 2'- and 3'-reduction of key spectinomycin-derived intermediates enabled facile access to all eight possible 2,3-stereoisomers of 4,6-dideoxyhexoses as well as representative 3,4,6-trideoxysugars and 3,4,6-trideoxy-3-aminohexoses. In addition, the method was applied to the synthesis of two functionalized sugars commonly associated with macrolide antibiotics-the 3-O-alkyl-4,6-dideoxysugar d-chalcose and the 3-N-alkyl-3,4,6-trideoxysugar d-desosamine.
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Affiliation(s)
- Yinan Zhang
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China.,Center for Pharmaceutical Research and Innovation, 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
| | - Larissa V Ponomareva
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Zheng Cui
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Steven G Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, 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
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26
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Huber TD, Clinger JA, Liu Y, Xu W, Miller MD, Phillips GN, Thorson JS. Methionine Adenosyltransferase Engineering to Enable Bioorthogonal Platforms for AdoMet-Utilizing Enzymes. ACS Chem Biol 2020; 15:695-705. [PMID: 32091873 DOI: 10.1021/acschembio.9b00943] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The structural conservation among methyltransferases (MTs) and MT functional redundancy is a major challenge to the cellular study of individual MTs. As a first step toward the development of an alternative biorthogonal platform for MTs and other AdoMet-utilizing enzymes, we describe the evaluation of 38 human methionine adenosyltransferase II-α (hMAT2A) mutants in combination with 14 non-native methionine analogues to identify suitable bioorthogonal mutant/analogue pairings. Enabled by the development and implementation of a hMAT2A high-throughput (HT) assay, this study revealed hMAT2A K289L to afford a 160-fold inversion of the hMAT2A selectivity index for a non-native methionine analogue over the native substrate l-Met. Structure elucidation of K289L revealed the mutant to be folded normally with minor observed repacking within the modified substrate pocket. This study highlights the first example of exchanging l-Met terminal carboxylate/amine recognition elements within the hMAT2A active-site to enable non-native bioorthgonal substrate utilization. Additionally, several hMAT2A mutants and l-Met substrate analogues produced AdoMet analogue products with increased stability. As many AdoMet-producing (e.g., hMAT2A) and AdoMet-utlizing (e.g., MTs) enzymes adopt similar active-site strategies for substrate recognition, the proof of concept first generation hMAT2A engineering highlighted herein is expected to translate to a range of AdoMet-utilizing target enzymes.
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Affiliation(s)
- Tyler D. Huber
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
- Center for Pharmaceutical Research and Innovation (CPRI), College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
| | | | - Yang Liu
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
- Center for Pharmaceutical Research and Innovation (CPRI), College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
| | | | | | | | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
- Center for Pharmaceutical Research and Innovation (CPRI), College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, Kentucky 40536-0596, United States
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27
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Wang X, Elshahawi SI, Ponomareva LV, Ye Q, Liu Y, Copley GC, Hower JC, Hatcher BE, Kharel MK, Van Lanen SG, She QB, Voss SR, Thorson JS, Shaaban KA. Structure Determination, Functional Characterization, and Biosynthetic Implications of Nybomycin Metabolites from a Mining Reclamation Site-Associated Streptomyces. J Nat Prod 2019; 82:3469-3476. [PMID: 31833370 PMCID: PMC7084111 DOI: 10.1021/acs.jnatprod.9b01015] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We report the isolation and characterization of three new nybomycins (nybomycins B-D, 1-3) and six known compounds (nybomycin, 4; deoxynyboquinone, 5; α-rubromycin, 6; β-rubromycin, 7; γ-rubromycin, 8; and [2α(1E,3E),4β]-2-(1,3-pentadienyl)-4-piperidinol, 9) from the Rock Creek (McCreary County, KY) underground coal mine acid reclamation site isolate Streptomyces sp. AD-3-6. Nybomycin D (3) and deoxynyboquinone (5) displayed moderate (3) to potent (5) cancer cell line cytotoxicity and displayed weak to moderate anti-Gram-(+) bacterial activity, whereas rubromycins 6-8 displayed little to no cancer cell line cytotoxicity but moderate to potent anti-Gram-(+) bacterial and antifungal activity. Assessment of the impact of 3 or 5 cancer cell line treatment on 4E-BP1 phosphorylation, a predictive marker of ROS-mediated control of cap-dependent translation, also revealed deoxynyboquinone (5)-mediated downstream inhibition of 4E-BP1p. Evaluation of 1-9 in a recently established axolotl embryo tail regeneration assay also highlighted the prototypical telomerase inhibitor γ-rubromycin (8) as a new inhibitor of tail regeneration. Cumulatively, this work highlights an alternative nybomycin production strain, a small set of new nybomycin metabolites, and previously unknown functions of rubromycins (antifungal activity and inhibition of tail regeneration) and also provides a basis for revision of the previously proposed nybomycin biosynthetic pathway.
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Affiliation(s)
- Xiachang Wang
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, People’s Republic of China
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Sherif I. Elshahawi
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California 92618, United States
| | - Larissa V. Ponomareva
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Qing Ye
- Markey Cancer Center, Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Yang Liu
- Center for Pharmaceutical Research and Innovation, 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
| | - James C. Hower
- Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Bruce E. Hatcher
- Division of Water, Kentucky Energy and Environment Cabinet, 2642 Russellville Road, Bowling Green, Kentucky 42101, United States
| | - Madan K. Kharel
- School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, Maryland 21853, United States
| | - Steven G. Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, 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
| | - Jon S. Thorson
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Khaled A. Shaaban
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
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Hughes RR, Shaaban KA, Ponomareva LV, Horn J, Zhang C, Zhan CG, Voss SR, Leggas M, Thorson JS. OleD Loki as a Catalyst for Hydroxamate Glycosylation. Chembiochem 2019; 21:952-957. [PMID: 31621997 DOI: 10.1002/cbic.201900601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Indexed: 12/14/2022]
Abstract
Herein we describe the ability of the permissive glycosyltransferase (GT) OleD Loki to convert a diverse set of >15 histone deacetylase (HDAC) inhibitors (HDACis) into their corresponding hydroxamate glycosyl esters. Representative glycosyl esters were subsequently evaluated in assays for cancer cell line cytotoxicity, chemical and enzymatic stability, and axolotl embryo tail regeneration. Computational substrate docking models were predictive of enzyme-catalyzed turnover and suggest certain HDACis may form unproductive, potentially inhibitory, complexes with GTs.
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Affiliation(s)
- Ryan R Hughes
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, Department of Pharmaceutical Sciences, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Khaled A Shaaban
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, Department of Pharmaceutical Sciences, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Larissa V Ponomareva
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, Department of Pharmaceutical Sciences, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Jamie Horn
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, Department of Pharmaceutical Sciences, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Chunhui Zhang
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, Department of Pharmaceutical Sciences, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Chang-Guo Zhan
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, Department of Pharmaceutical Sciences, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - S Randal Voss
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, Ambystoma Genetic Stock Center, University of Kentucky, UK Medical Center MN 150, Lexington, KY, 40536, USA
| | - Markos Leggas
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, Department of Pharmaceutical Sciences, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Jon S Thorson
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, Department of Pharmaceutical Sciences, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
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Noriler SA, Savi DC, Ponomareva LV, Rodrigues R, Rohr J, Thorson JS, Glienke C, Shaaban KA. Vochysiamides A and B: Two new bioactive carboxamides produced by the new species Diaporthe vochysiae. Fitoterapia 2019; 138:104273. [PMID: 31344395 PMCID: PMC7015639 DOI: 10.1016/j.fitote.2019.104273] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 07/20/2019] [Accepted: 07/21/2019] [Indexed: 01/05/2023]
Abstract
Endophytic fungi have been considered a rich source for bioactive secondary metabolites with novel chemical structures. A high diverse group of endophytes, isolated from different medicinal plants, belongs to the genus Diaporthe. In a previously study performed by our group the crude extract of strain LGMF1583 showed considerable antibacterial activity mainly against Gram-negative bacteria. Based on ITS phylogeny analysis, strain LGMF1583 was identified as belonging to Diaporthe genus and may represent a new species. In the present study, we described the new species Diporthe vochysiae based on multilocus phylogeny analysis and morphological characteristics. The species name refers to the host, from which strain LGMF1583 was isolated, the medicinal plant Vochysia divergens. In view of the biotechnological potential of strain LGMF1583, we have also characterized the secondary metabolites produced by D. vochysiae. Chemical assessment of the D. vochysiae LGMF1583 revealed two new carboxamides, vochysiamides A (1) and B (2), in addition to the known metabolite, 2,5-dihydroxybenzyl alcohol (3). In the biological activity analysis, vochysiamide B (2) displayed considerable antibacterial activity against the Gram-negative bacterium Klebsiella pneumoniae (KPC), a producer of carbapenemases, MIC of 80 μg/mL. Carbapenemases are considered a major antimicrobial resistance threat, and infections caused by KPC have been considered a public health problem worldwide, and new compounds with activity against this bacterium are nowadays even more required.
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Affiliation(s)
- Sandriele Aparecida Noriler
- Department of Pathology, Universidade Federal do Parana, Av. Coronel Francisco Heráclito dos Santos, 210, CEP: 81531-970 Curitiba, PR, Brazil
| | - Daiani Cristina Savi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States; Department of Genetics, Universidade Federal do Parana, Av. Coronel Francisco Heráclito dos Santos, 210, CEP: 81531-970 Curitiba, PR, Brazil
| | - Larissa V Ponomareva
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States; Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, KY 40536, United States
| | - Renata Rodrigues
- Department of Pathology, Universidade Federal do Parana, Av. Coronel Francisco Heráclito dos Santos, 210, CEP: 81531-970 Curitiba, PR, Brazil
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States; Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, KY 40536, United States
| | - Chirlei Glienke
- Department of Genetics, Universidade Federal do Parana, Av. Coronel Francisco Heráclito dos Santos, 210, CEP: 81531-970 Curitiba, PR, Brazil.
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, United States; Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, KY 40536, United States.
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30
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Savi DC, Noriler SA, Ponomareva LV, Thorson JS, Rohr J, Glienke C, Shaaban KA. Dihydroisocoumarins produced by Diaporthe cf. heveae LGMF1631 inhibiting citrus pathogens. Folia Microbiol (Praha) 2019; 65:381-392. [PMID: 31401763 DOI: 10.1007/s12223-019-00746-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 07/29/2019] [Indexed: 11/30/2022]
Abstract
Citrus black spot (CBS) and post-bloom fruit drop (PFD), caused by Phyllosticta citricarpa and Colletotrichum abscissum, respectively, are two important citrus diseases worldwide. CBS depreciates the market value and prevents exportation of citrus fruits to Europe. PFD under favorable climatic conditions can cause the abscission of flowers, thereby reducing citrus production by 80%. An ecofriendly alternative to control plant diseases is the use of endophytic microorganisms, or secondary metabolites produced by them. Strain LGMF1631, close related to Diaporthe cf. heveae 1, was isolated from the medicinal plant Stryphnodendron adstringens and showed significant antimicrobial activity, in a previous study. In view of the potential presented by strain LGMF1631, and the absence of chemical data for secondary metabolites produced by D. cf. heveae, we decided to characterize the compounds produced by strain LGMF1631. Based on ITS, TEF1, and TUB phylogenetic analysis, strain LGMF1631 was confirmed to belong to D. cf. heveae 1. Chemical assessment of the fungal strain LGMF1631 revealed one new seco-dihydroisocoumarin [cladosporin B (1)] along with six other related, already known dihydroisocoumarin derivatives and one monoterpene [(-)-(1S,2R,3S,4R)-p-menthane-1,2,3-triol (8)]. Among the isolated metabolites, compound 5 drastically reduced the growth of both phytopathogens in vitro and completely inhibited the development of CBS and PFD in citrus fruits and flowers. In addition, compound 5 did not show toxicity against human cancer cell lines or citrus leaves, at concentrations higher than used for the inhibition of the phytopathogens, suggesting the potential use of (-)-(3R,4R)-cis-4-hydroxy-5-methylmellein (5) to control citrus diseases.
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Affiliation(s)
- Daiani Cristina Savi
- Department of Genetics, Universidade Federal do Parana, Av. Coronel Francisco Heráclito dos Santos, 210, Curitiba, PR, 81531-970, Brazil.,Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentuck, Lexington, KY, 40536, USA
| | - Sandriele Aparecida Noriler
- Department of Pathology, Universidade Federal do Parana, Av. Coronel Francisco Heráclito dos Santos, 210, Curitiba, PR, 81531-970, Brazil
| | - Larissa V Ponomareva
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentuck, Lexington, KY, 40536, USA.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentuck, Lexington, KY, 40536, USA.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentuck, Lexington, KY, 40536, USA
| | - Chirlei Glienke
- Department of Genetics, Universidade Federal do Parana, Av. Coronel Francisco Heráclito dos Santos, 210, Curitiba, PR, 81531-970, Brazil.
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentuck, Lexington, KY, 40536, USA. .,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA.
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31
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Wang X, Abbas M, Zhang Y, Elshahawi SI, Ponomareva LV, Cui Z, Van Lanen SG, Sajid I, Voss SR, Shaaban KA, Thorson JS. Baraphenazines A-G, Divergent Fused Phenazine-Based Metabolites from a Himalayan Streptomyces. J Nat Prod 2019; 82:1686-1693. [PMID: 31117525 PMCID: PMC6630045 DOI: 10.1021/acs.jnatprod.9b00289] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The structures and bioactivities of three unprecedented fused 5-hydroxyquinoxaline/alpha-keto acid amino acid metabolites (baraphenazines A-C, 1-3), two unique diastaphenazine-type metabolites (baraphenazines D and E, 4 and 5) and two new phenazinolin-type (baraphenazines F and G, 6 and 7) metabolites from the Himalayan isolate Streptomyces sp. PU-10A are reported. This study highlights the first reported bacterial strain capable of producing diastaphenazine-type, phenazinolin-type, and izumiphenazine A-type metabolites and presents a unique opportunity for the future biosynthetic interrogation of late-stage phenazine-based metabolite maturation.
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Affiliation(s)
- Xiachang Wang
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, People’s Republic of China
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Muhammad Abbas
- Department of Microbiology and Molecular Genetics, University of the Punjab, Quid-i-Azam campus, Lahore 54590, Pakistan
| | - Yinan Zhang
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing 210023, People’s Republic of China
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Sherif I. Elshahawi
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California 92618, United States
| | - Larissa V. Ponomareva
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, Kentucky 40536, United States
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Zheng Cui
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Steven G. Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Imran Sajid
- Department of Microbiology and Molecular Genetics, University of the Punjab, Quid-i-Azam campus, Lahore 54590, Pakistan
| | - S. Randal Voss
- Department of Neuroscience, University of Kentucky, Lexington, Kentucky 40506, United States
- Ambystoma Genetic Stock Center, University of Kentucky, Lexington, Kentucky 40506, United States
- Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Khaled A. Shaaban
- Center for Pharmaceutical Research and Innovation, 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.,
| | - Jon S. Thorson
- Center for Pharmaceutical Research and Innovation, 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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Zhang Y, Ye Q, Ponomareva LV, Cao Y, Liu Y, Cui Z, Van Lanen SG, Voss SR, She QB, Thorson JS. Total synthesis of griseusins and elucidation of the griseusin mechanism of action. Chem Sci 2019; 10:7641-7648. [PMID: 31583069 PMCID: PMC6755659 DOI: 10.1039/c9sc02289a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 06/26/2019] [Indexed: 12/15/2022] Open
Abstract
An efficient divergent synthesis of griseusins enabled SAR studies, mechanistic elucidation and evaluation in an axolotl tail regeneration model.
A divergent modular strategy for the enantioselective total synthesis of 12 naturally-occurring griseusin type pyranonaphthoquinones and 8 structurally-similar analogues is described. Key synthetic highlights include Cu-catalyzed enantioselective boration–hydroxylation and hydroxyl-directed C–H olefination to afford the central pharmacophore followed by epoxidation–cyclization and maturation via diastereoselective reduction and regioselective acetylation. Structural revision of griseusin D and absolute structural assignment of 2a,8a-epoxy-epi-4′-deacetyl griseusin B are also reported. Subsequent mechanistic studies establish, for the first time, griseusins as potent inhibitors of peroxiredoxin 1 (Prx1) and glutaredoxin 3 (Grx3). Biological evaluation, including comparative cancer cell line cytotoxicity and axolotl embryo tail inhibition studies, highlights the potential of griseusins as potent molecular probes and/or early stage leads in cancer and regenerative biology.
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Affiliation(s)
- Yinan Zhang
- Jiangsu Key Laboratory for Functional Substances of Chinese Medicine , School of Pharmacy , Nanjing University of Chinese Medicine , Nanjing , Jiangsu 210023 , China.,Center for Pharmaceutical Research and Innovation , University of Kentucky , Lexington , KY 40536 , USA.,College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
| | - Qing Ye
- Markey Cancer Center , Department of Pharmacology and Nutritional Sciences , College of Medicine , University of Kentucky , Lexington , KY 40536 , USA .
| | - Larissa V Ponomareva
- Center for Pharmaceutical Research and Innovation , University of Kentucky , Lexington , KY 40536 , USA.,College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
| | - Yanan Cao
- Markey Cancer Center , Department of Pharmacology and Nutritional Sciences , College of Medicine , University of Kentucky , Lexington , KY 40536 , USA .
| | - Yang Liu
- Center for Pharmaceutical Research and Innovation , University of Kentucky , Lexington , KY 40536 , USA.,College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
| | - Zheng Cui
- College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
| | - Steven G Van Lanen
- College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
| | - S Randal Voss
- Department of Neuroscience , Spinal Cord and Brain Injury Research Center , Ambystoma Genetic Stock Center , University of Kentucky , Lexington , KY 40536 , USA
| | - Qing-Bai She
- Markey Cancer Center , Department of Pharmacology and Nutritional Sciences , College of Medicine , University of Kentucky , Lexington , KY 40536 , USA .
| | - Jon S Thorson
- Center for Pharmaceutical Research and Innovation , University of Kentucky , Lexington , KY 40536 , USA.,College of Pharmacy , University of Kentucky , Lexington , KY 40536 , USA .
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Voss SR, Ponomareva LV, Dwaraka VB, Pardue KE, Baddar NWAH, Rodgers AK, Woodcock MR, Qiu Q, Crowner A, Blichmann D, Khatri S, Thorson JS. HDAC Regulates Transcription at the Outset of Axolotl Tail Regeneration. Sci Rep 2019; 9:6751. [PMID: 31043677 PMCID: PMC6494824 DOI: 10.1038/s41598-019-43230-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 04/15/2019] [Indexed: 01/31/2023] Open
Abstract
Tissue regeneration is associated with complex changes in gene expression and post-translational modifications of proteins, including transcription factors and histones that comprise chromatin. We tested 172 compounds designed to target epigenetic mechanisms in an axolotl (Ambystoma mexicanum) embryo tail regeneration assay. A relatively large number of compounds (N = 55) inhibited tail regeneration, including 18 histone deacetylase inhibitors (HDACi). In particular, romidepsin, an FDA-approved anticancer drug, potently inhibited tail regeneration when embryos were treated continuously for 7 days. Additional experiments revealed that romidepsin acted within a very narrow, post-injury window. Romidepsin treatment for only 1-minute post amputation inhibited regeneration through the first 7 days, however after this time, regeneration commenced with variable outgrowth of tailfin tissue and abnormal patterning. Microarray analysis showed that romidepsin altered early, transcriptional responses at 3 and 6-hour post-amputation, especially targeting genes that are implicated in tumor cell death, as well as genes that function in the regulation of transcription, cell differentiation, cell proliferation, pattern specification, and tissue morphogenesis. Our results show that HDAC activity is required at the time of tail amputation to regulate the initial transcriptional response to injury and regeneration.
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Affiliation(s)
- S Randal Voss
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40506, USA.
| | - Larissa V Ponomareva
- College of Pharmacy and Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA
| | - Varun B Dwaraka
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40506, USA
| | - Kaitlin E Pardue
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40506, USA
| | - Nour W Al Haj Baddar
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40506, USA
| | - A Katherine Rodgers
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40506, USA
| | - M Ryan Woodcock
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40506, USA.,Department of Biology, Keene State College, Keene, NH, 03431, USA
| | - Qingchao Qiu
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40506, USA
| | - Anne Crowner
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40506, USA
| | - Dana Blichmann
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40506, USA
| | - Shivam Khatri
- Department of Neuroscience, Spinal Cord and Brain Injury Research Center, and Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40506, USA
| | - Jon S Thorson
- College of Pharmacy and Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA
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Fatima A, Aftab U, Shaaban KA, Thorson JS, Sajid I. Spore forming Actinobacterial diversity of Cholistan Desert Pakistan: Polyphasic taxonomy, antimicrobial potential and chemical profiling. BMC Microbiol 2019; 19:49. [PMID: 30795744 PMCID: PMC6387500 DOI: 10.1186/s12866-019-1414-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 02/08/2019] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Actinobacteria are famous for the production of unique secondary metabolites that help in controlling the continuously emerging drug resistance all over the globe. This study aimed at the investigation of an extreme environment the Cholistan desert, located in southern Punjab, Pakistan, for actinobacterial diversity and their activity against methicillin resistant Staphylococcus aureus (MRSA). The Cholistan desert is a sub-tropical and arid ecosystem with harsh environment, limited rainfall and low humidity. The 20 soil and sand samples were collected from different locations in the desert and the actinobacterial strains were selectively isolated. The isolated strains were identified using a polyphasic taxonomic approach including morphological, biochemical, physiological characterization, scanning electron microscopy (SEM) and by 16S rRNA gene sequencing. RESULTS A total of 110 desert actinobacterial strains were recovered, which were found to be belonging to 3 different families of the order Actinomycetales, including the family Streptomycetaceae, family Pseudonocardiaceae and the family Micrococcaceae. The most frequently isolated genus was Streptomyces along with the genera Pseudonocardia and Arthrobacter. The isolated strains exhibited promising antimicrobial activity against methicillin resistant Staphylococcus aureus (MRSA) with zone of inhibition in the range of 9-32 mm in antimicrobial screening assays. The chemical profiling by thin layer chromatography, HPLC-UV/Vis and LC-MS analysis depicted the presence of different structural classes of antibiotics. CONCLUSION The study revealed that Cholistan desert harbors immense actinobacterial diversity and most of the strains produce structurally diverse bioactive secondary metabolites, which are a promising source of novel antimicrobial drug candidates.
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Affiliation(s)
- Adeela Fatima
- Department of Microbiology and Molecular Genetics (MMG), University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590 Pakistan
| | - Usman Aftab
- Department of Microbiology and Molecular Genetics (MMG), University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590 Pakistan
| | - Khaled A. Shaaban
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY 40536 USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536 USA
| | - Jon S. Thorson
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY 40536 USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536 USA
| | - Imran Sajid
- Department of Microbiology and Molecular Genetics (MMG), University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590 Pakistan
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36
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Ye Q, Zhang Y, Cao Y, Wang X, Guo Y, Chen J, Horn J, Ponomareva LV, Chaiswing L, Shaaban KA, Wei Q, Anderson BD, St Clair DK, Zhu H, Leggas M, Thorson JS, She QB. Frenolicin B Targets Peroxiredoxin 1 and Glutaredoxin 3 to Trigger ROS/4E-BP1-Mediated Antitumor Effects. Cell Chem Biol 2019; 26:366-377.e12. [PMID: 30661989 DOI: 10.1016/j.chembiol.2018.11.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 10/22/2018] [Accepted: 11/19/2018] [Indexed: 12/12/2022]
Abstract
Peroxiredoxin 1 (Prx1) and glutaredoxin 3 (Grx3) are two major antioxidant proteins that play a critical role in maintaining redox homeostasis for tumor progression. Here, we identify the prototypical pyranonaphthoquinone natural product frenolicin B (FB) as a selective inhibitor of Prx1 and Grx3 through covalent modification of active-site cysteines. FB-targeted inhibition of Prx1 and Grx3 results in a decrease in cellular glutathione levels, an increase of reactive oxygen species (ROS), and concomitant inhibition of cancer cell growth, largely by activating the peroxisome-bound tuberous sclerosis complex to inhibit mTORC1/4E-BP1 signaling axis. FB structure-activity relationship studies reveal a positive correlation between inhibition of 4E-BP1 phosphorylation, ROS-mediated cancer cell cytotoxicity, and suppression of tumor growth in vivo. These findings establish FB as the most potent Prx1/Grx3 inhibitor reported to date and also notably highlight 4E-BP1 phosphorylation status as a potential predictive marker in response to ROS-based therapies in cancer.
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Affiliation(s)
- Qing Ye
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY 40536, USA; Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA
| | - Yinan Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY 40536, USA; Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210047, China
| | - Yanan Cao
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY 40536, USA; Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA
| | - Xiachang Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY 40536, USA; Jiangsu Key Laboratory for Functional Substances of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210047, China
| | - Yubin Guo
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY 40536, USA; Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA
| | - Jing Chen
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; Department of Molecular and Cellular Biochemistry, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Jamie Horn
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY 40536, USA
| | - Larissa V Ponomareva
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY 40536, USA
| | - Luksana Chaiswing
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; Department of Toxicology and Cancer Biology, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY 40536, USA
| | - Qiou Wei
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; Department of Toxicology and Cancer Biology, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Bradley D Anderson
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY 40536, USA
| | - Daret K St Clair
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; Department of Toxicology and Cancer Biology, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Haining Zhu
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; Department of Molecular and Cellular Biochemistry, College of Medicine, University of Kentucky, Lexington, KY 40536, USA
| | - Markos Leggas
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY 40536, USA
| | - Jon S Thorson
- Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA; Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY 40536, USA.
| | - Qing-Bai She
- Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY 40536, USA; Markey Cancer Center, University of Kentucky, Lexington, KY 40536, USA.
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Abbas M, Elshahawi SI, Wang X, Ponomareva LV, Sajid I, Shaaban KA, Thorson JS. Puromycins B-E, Naturally Occurring Amino-Nucleosides Produced by the Himalayan Isolate Streptomyces sp. PU-14G. J Nat Prod 2018; 81:2560-2566. [PMID: 30418763 PMCID: PMC6393767 DOI: 10.1021/acs.jnatprod.8b00720] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The isolation and structure elucidation of four new naturally occurring amino-nucleoside [puromycins B-E (1-4)] metabolites from a Himalayan isolate ( Streptomyces sp. PU-14-G, isolated from the Bara Gali region of northern Pakistan) is reported. Consistent with prior reports, comparative antimicrobial assays revealed the need for the free 2″-amine for anti-Gram-positive bacteria and antimycobacterial activity. Similarly, comparative cancer cell line cytotoxicity assays highlighted the importance of the puromycin-free 2″-amine and the impact of 3'-nucleoside substitution. These studies extend the repertoire of known naturally occurring puromycins and their corresponding SAR. Notably, 1 represents the first reported naturally occurring bacterial puromycin-related metabolite with a 3'- N-amino acid substitution that differs from the 3'- N-tyrosinyl of classical puromycin-type natural products. This discovery suggests the biosynthesis of 1 in Streptomyces sp. PU-14G may invoke a uniquely permissive amino-nucleoside synthetase and/or multiple synthetases and sets the stage for further studies to elucidate, and potentially exploit, new biocatalysts for puromycin chemoenzymatic diversification.
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Affiliation(s)
- Muhammad Abbas
- 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
- Department of Microbiology and Molecular Genetics, University of the Punjab, Quid-i-Azam Campus, Lahore 54590, Pakistan
| | - 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
- Department of Biomedical and Pharmaceutical Sciences, Chapman University School of Pharmacy, Irvine, California 92618, 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
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, College of Pharmacy, Nanjing University of Chinese Medicine, Nanjing 210023, People’s Republic of China
| | - 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
| | - Imran Sajid
- Department of Microbiology and Molecular Genetics, University of the Punjab, Quid-i-Azam Campus, Lahore 54590, Pakistan
| | - 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.,
| | - 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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Clinger JA, Elshahawi SI, Zhang Y, Hall RP, Liu Y, Miller MD, Thorson JS, Phillips GN. Structure and function of terfestatin biosynthesis proteins TerB and TerC. Acta Crystallogr A Found Adv 2018. [DOI: 10.1107/s0108767318099476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Cui Z, Liu X, Overbay J, Cai W, Wang X, Lemke A, Wiegmann D, Niro G, Thorson JS, Ducho C, Van Lanen SG. Enzymatic Synthesis of the Ribosylated Glycyl-Uridine Disaccharide Core of Peptidyl Nucleoside Antibiotics. J Org Chem 2018; 83:7239-7249. [PMID: 29768920 DOI: 10.1021/acs.joc.8b00855] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Muraymycins belong to a family of nucleoside antibiotics that have a distinctive disaccharide core consisting of 5-amino-5-deoxyribofuranose (ADR) attached to 6'- N-alkyl-5'- C-glycyluridine (GlyU). Here, we functionally assign and characterize six enzymes from the muraymycin biosynthetic pathway involved in the core assembly that starts from uridine monophosphate (UMP). The biosynthesis is initiated by Mur16, a nonheme Fe(II)- and α-ketoglutarate-dependent dioxygenase, followed by four transferase enzymes: Mur17, a pyridoxal-5'-phosphate (PLP)-dependent transaldolase; Mur20, an aminotransferase; Mur26, a pyrimidine phosphorylase; and Mur18, a nucleotidylyltransferase. The pathway culminates in glycosidic bond formation in a reaction catalyzed by an additional transferase enzyme, Mur19, a ribosyltransferase. Analysis of the biochemical properties revealed several noteworthy discoveries including that (i) Mur16 and downstream enzymes can also process 2'-deoxy-UMP to generate a 2-deoxy-ADR, which is consistent with the structure of some muraymycin congeners; (ii) Mur20 prefers l-Tyr as the amino donor source; (iii) Mur18 activity absolutely depends on the amine functionality of the ADR precursor consistent with the nucleotidyltransfer reaction occurring after the Mur20-catalyzed aminotransfer reaction; and (iv) the bona fide sugar acceptor for Mur19 is (5' S,6' S)-GlyU, suggesting that ribosyltransfer occurs prior to N-alkylation of GlyU. Finally, a one-pot, six-enzyme reaction was utilized to generate the ADR-GlyU disaccharide core starting from UMP.
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Affiliation(s)
| | | | | | | | - Xiachang Wang
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, School of Pharmacy , Nanjing University of Chinese Medicine , Nanjing 210023 , People's Republic of China
| | - Anke Lemke
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry , Saarland University , Campus C2 3 , 66123 Saarbrücken , Germany
| | - Daniel Wiegmann
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry , Saarland University , Campus C2 3 , 66123 Saarbrücken , Germany
| | - Giuliana Niro
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry , Saarland University , Campus C2 3 , 66123 Saarbrücken , Germany
| | | | - Christian Ducho
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry , Saarland University , Campus C2 3 , 66123 Saarbrücken , Germany
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40
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Rivas JR, Alhakeem SS, Eckenrode J, Zhang Y, Collard JP, Rangnekar VM, Muthusamy N, Thorson JS, Leggas M, Bondada S. Approaches to reverse interleukin-10 mediated immunosuppression in chronic lymphocytic leukemia. The Journal of Immunology 2018. [DOI: 10.4049/jimmunol.200.supp.123.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
B cell Chronic Lymphocytic Leukemia (CLL), the most common leukemia in the western world, is characterized by an accumulation of abnormal B cells in the blood and lymphoid organs. Broad immunosuppression is a serious complication for these patients, with infections and secondary cancers recognized as the leading causes of morbidity and mortality. Although the immune suppression is in part due to clonotypic CLL B cells crowding immune organs, immune responses may also be suppressed by the production of soluble mediators. We and others found that CLL cells produce interleukin-10 (IL-10), a cytokine that suppresses T cell effector function. We hypothesized that this IL-10 may reduce anti-tumor T cell responses. In our studies we use human cells as well as the Eμ-Tcl1 mouse model for U-CLL, in which the oncogene Tcl1 is expressed under the immunoglobulin VH promoter and μ-enhancer. Previously, we found that IL-10R−/− T cells control CLL growth better than WT T cells in the Eμ-Tcl1 adoptive transfer model. We also saw that CLL IL-10 production is dependent on BCR signaling and activation of the transcription factor Sp-1. IL-10 production can be blocked by mithramycin (MTM), an Sp-1 inhibitor. However, MTM is not used routinely as an anti-cancer agent due to its short half-life and associated toxicities, so we prepared and tested novel analogues of MTM to reduce these effects. One of these analogues, MTM23, shows promise as it has similar potency to MTM, but does not interfere with T cell gamma-interferon production or viability. This approach is novel as current therapies for CLL do not target IL-10, or address the immunosuppression seen in CLL patients. IL-10 blockade could therefore be a strategy for harnessing anti-tumor T cells to treat CLL in humans.
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Abstract
Muraymycins are nucleoside antibiotics isolated from Streptomyces sp. NRRL 30471 and several mutant strains thereof that were generated by random, chemical mutagenesis. Reinvestigation of two mutant strains using new media conditions led to the isolation of three new muraymycin congeners, named B8, B9, and C6 (1-3), as well as a known muraymycin, C1. Structures of the compounds were elucidated by HRMS and 1D and 2D NMR spectroscopic analyses. Complete 2D NMR assignments for the known muraymycin C1 are also provided for the first time. Compounds 1 and 2, which differ from other muraymycins by having an elongated, terminally branched fatty acid side chain, had picomolar IC50 values against Staphylococcus aureus and Aquifex aeolicus MraY and showed good antibacterial activity against S. aureus (MIC = 2 and 6 μg/mL, respectively) and Escherichia coli Δ tolC (MIC = 4 and 2 μg/mL, respectively). Compound 3, which is characterized by an N-acetyl modification of the primary amine of the dissacharide core that is shared among nearly all of the reported muraymycin congeners, greatly reduced its inhibitory and antibacterial activity compared to nonacylated muraymycin C1, which possibly indicates this modification is used for self-resistance.
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Affiliation(s)
- Zheng Cui
- 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
- Jiangsu Key Laboratory for Functional Substance of
Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine,
Nanjing 210023, People’s Republic of China
| | - Stefan Koppermann
- Department of Pharmacy, Pharmaceutical and Medicinal
Chemistry, Saarland University Campus C2 3, 66123 Saarbrücken, Germany
| | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of
Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
- Center for Pharmaceutical Research and Innovation,
College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United
States
| | - Christian Ducho
- Department of Pharmacy, Pharmaceutical and Medicinal
Chemistry, Saarland University Campus C2 3, 66123 Saarbrücken, Germany
| | - Steven G. Van Lanen
- Department of Pharmaceutical Sciences, College of
Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
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Koppermann S, Cui Z, Fischer PD, Wang X, Ludwig J, Thorson JS, Van Lanen SG, Ducho C. Insights into the Target Interaction of Naturally Occurring Muraymycin Nucleoside Antibiotics. ChemMedChem 2018; 13:779-784. [PMID: 29438582 PMCID: PMC6019934 DOI: 10.1002/cmdc.201700793] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/02/2018] [Indexed: 11/08/2022]
Abstract
Muraymycins are a subclass of antimicrobially active uridine-derived natural products. Biological data on several muraymycin analogues have been reported, including some inhibitory in vitro activities toward their target protein, the bacterial membrane enzyme MraY. However, a structure-activity relationship (SAR) study on naturally occurring muraymycins based on such in vitro data has been missing so far. In this work, we report a detailed SAR investigation on representatives of the four muraymycin subgroups A-D using a fluorescence-based in vitro MraY assay. For some muraymycins, inhibition of MraY with IC50 values in the low-picomolar range was observed. These inhibitory potencies were compared with antibacterial activities and were correlated to modelling data derived from a previously reported X-ray crystal structure of MraY in complex with a muraymycin inhibitor. Overall, these results will pave the way for the development of muraymycin analogues with optimized properties as antibacterial drug candidates.
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Affiliation(s)
- Stefan Koppermann
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2 3, 66123, Saarbrücken, Germany
| | - Zheng Cui
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 S. Limestone Street, Lexington, KY, 40536, USA
| | - Patrick D Fischer
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2 3, 66123, Saarbrücken, Germany
| | - Xiachang Wang
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, School of Pharmacy, Nanjing University of Chinese Medicine, Nanjing, 210023, P.R. China
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 S. Limestone Street, Lexington, KY, 40536, USA
| | - Jannine Ludwig
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2 3, 66123, Saarbrücken, Germany
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 S. Limestone Street, Lexington, KY, 40536, USA
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 S. Limestone Street, Lexington, KY, 40536, USA
| | - Steven G Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 S. Limestone Street, Lexington, KY, 40536, USA
| | - Christian Ducho
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry, Saarland University, Campus C2 3, 66123, Saarbrücken, Germany
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Koppermann S, Cui Z, Fischer PD, Wang X, Ludwig J, Thorson JS, Van Lanen SG, Ducho C. Cover Feature: Insights into the Target Interaction of Naturally Occurring Muraymycin Nucleoside Antibiotics (ChemMedChem 8/2018). ChemMedChem 2018. [DOI: 10.1002/cmdc.201800227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Stefan Koppermann
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry; Saarland University; Campus C2 3 66123 Saarbrücken Germany
| | - Zheng Cui
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Kentucky; 789 S. Limestone Street Lexington KY 40536 USA
| | - Patrick D. Fischer
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry; Saarland University; Campus C2 3 66123 Saarbrücken Germany
| | - Xiachang Wang
- Jiangsu Key Laboratory for Functional Substance of Chinese Medicine, School of Pharmacy; Nanjing University of Chinese Medicine; Nanjing 210023 P.R. China
- Center for Pharmaceutical Research and Innovation, College of Pharmacy; University of Kentucky; 789 S. Limestone Street Lexington KY 40536 USA
| | - Jannine Ludwig
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry; Saarland University; Campus C2 3 66123 Saarbrücken Germany
| | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Kentucky; 789 S. Limestone Street Lexington KY 40536 USA
- Center for Pharmaceutical Research and Innovation, College of Pharmacy; University of Kentucky; 789 S. Limestone Street Lexington KY 40536 USA
| | - Steven G. Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy; University of Kentucky; 789 S. Limestone Street Lexington KY 40536 USA
| | - Christian Ducho
- Department of Pharmacy, Pharmaceutical and Medicinal Chemistry; Saarland University; Campus C2 3 66123 Saarbrücken Germany
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Leggas M, Eckenrode JM, Hayden R, Thorson JS, Mitra P, Rohr J. Mithramycin analogues with reduced toxicity for the treatment of ETS transcription factor driven tumors. FASEB J 2018. [DOI: 10.1096/fasebj.2018.32.1_supplement.836.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Markos Leggas
- Pharmaceutical SciencesUniversity of KentuckyLexingtonKY
- Center for Pharmaceutical Research and InnovationUniversity of KentuckyLexingtonKY
- Markey Cancer CenterUniversity of KentuckyLexingtonKY
| | | | - Reiya Hayden
- Pharmaceutical SciencesUniversity of KentuckyLexingtonKY
| | - Jon S. Thorson
- Pharmaceutical SciencesUniversity of KentuckyLexingtonKY
- Center for Pharmaceutical Research and InnovationUniversity of KentuckyLexingtonKY
| | - Prithiba Mitra
- Pharmaceutical SciencesUniversity of KentuckyLexingtonKY
| | - Jurgen Rohr
- Pharmaceutical SciencesUniversity of KentuckyLexingtonKY
- Markey Cancer CenterUniversity of KentuckyLexingtonKY
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45
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de Medeiros AG, Savi DC, Mitra P, Shaaban KA, Jha AK, Thorson JS, Rohr J, Glienke C. Bioprospecting of Diaporthe terebinthifolii LGMF907 for antimicrobial compounds. Folia Microbiol (Praha) 2018; 63:499-505. [PMID: 29497981 DOI: 10.1007/s12223-018-0587-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Accepted: 01/19/2018] [Indexed: 10/17/2022]
Abstract
Antibiotic-resistant bacteria have been observed with increasing frequency over the past decades, driving the search for new drugs and stimulating the interest in natural products sources. Endophytic fungi from medicinal plants represent a great source of novel bioactive compounds useful to pharmaceutical and agronomical purposes. Diaporthe terebinthifolii is an endophytic species isolated from Schinus terebinthifolius, a plant used in popular medicine for several health problems. The strain D. terebinthifolii LGMF907 was previously reported by our group to produce secondary metabolites with biological activity against phytopathogens. Based on these data, strain LGMF907 was chosen for bioprospecting against microorganisms of clinical importance and for characterization of major secondary metabolites. In this study, different culture conditions were evaluated and the biological activity of this strain was expanded. The crude extracts demonstrated high antibacterial activity against Escherichia coli, Micrococcus luteus, Saccharomyces cerevisiae, methicillin-sensitive Staphylococcus aureus, and methicillin-resistant S. aureus. The compounds diaporthin and orthosporin were characterized and also showed activity against the clinical microorganisms evaluated. This study discloses the first isolation of diaporthin and orthosporin from D. terebinthifolii, and revealed the potential of this endophytic fungus to produce secondary metabolites with antimicrobial activity.
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Affiliation(s)
- Aliandra G de Medeiros
- Department of Genetics, Universidade Federal do Paraná, P.O. Box 19071, Curitiba, PR, CEP: 81531-980, Brazil.,Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Daiani C Savi
- Department of Genetics, Universidade Federal do Paraná, P.O. Box 19071, Curitiba, PR, CEP: 81531-980, Brazil.,Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Prithiba Mitra
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA.,Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, KY, 40536, USA
| | - Amit K Jha
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA.,Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, KY, 40536, USA
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA.
| | - Chirlei Glienke
- Department of Genetics, Universidade Federal do Paraná, P.O. Box 19071, Curitiba, PR, CEP: 81531-980, Brazil.
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Savi DC, Shaaban KA, Gos FMWR, Ponomareva LV, Thorson JS, Glienke C, Rohr J. Phaeophleospora vochysiae Savi & Glienke sp. nov. Isolated from Vochysia divergens Found in the Pantanal, Brazil, Produces Bioactive Secondary Metabolites. Sci Rep 2018; 8:3122. [PMID: 29449610 PMCID: PMC5814415 DOI: 10.1038/s41598-018-21400-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 01/29/2018] [Indexed: 11/09/2022] Open
Abstract
Microorganisms associated with plants are highly diverse and can produce a large number of secondary metabolites, with antimicrobial, anti-parasitic and cytotoxic activities. We are particularly interested in exploring endophytes from medicinal plants found in the Pantanal, a unique and widely unexplored wetland in Brazil. In a bio-prospecting study, strains LGMF1213 and LGMF1215 were isolated as endophytes from Vochysia divergens, and by morphological and molecular phylogenetic analyses were characterized as Phaeophleospora vochysiae sp. nov. The chemical assessment of this species reveals three major compounds with high biological activity, cercoscosporin (1), isocercosporin (2) and the new compound 3-(sec-butyl)-6-ethyl-4,5-dihydroxy-2-methoxy-6-methylcyclohex-2-enone (3). Besides the isolation of P. vochysiae as endophyte, the production of cercosporin compounds suggest that under specific conditions this species causes leaf spots, and may turn into a pathogen, since leaf spots are commonly caused by species of Cercospora that produce related compounds. In addition, the new compound 3-(sec-butyl)-6-ethyl-4,5-dihydroxy-2-methoxy-6-methylcyclohex-2-enone showed considerable antimicrobial activity and low cytotoxicity, which needs further exploration.
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Affiliation(s)
- Daiani C Savi
- Department of Genetics, Universidade Federal do Parana, Av. Coronel Francisco Heráclito dos Santos, 210. CEP, 81531-970, Curitiba, PR, Brazil.,Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536-0596, USA
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536-0596, USA.,Center for Pharmaceutical Research and Innovation (CPRI), College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536-0596, USA
| | - Francielly Maria Wilke Ramos Gos
- Department of Genetics, Universidade Federal do Parana, Av. Coronel Francisco Heráclito dos Santos, 210. CEP, 81531-970, Curitiba, PR, Brazil
| | - Larissa V Ponomareva
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536-0596, USA.,Center for Pharmaceutical Research and Innovation (CPRI), College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536-0596, USA
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536-0596, USA.,Center for Pharmaceutical Research and Innovation (CPRI), College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536-0596, USA
| | - Chirlei Glienke
- Department of Genetics, Universidade Federal do Parana, Av. Coronel Francisco Heráclito dos Santos, 210. CEP, 81531-970, Curitiba, PR, Brazil.
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, 40536-0596, USA.
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47
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Gos FMWR, Savi DC, Shaaban KA, Thorson JS, Aluizio R, Possiede YM, Rohr J, Glienke C. Antibacterial Activity of Endophytic Actinomycetes Isolated from the Medicinal Plant Vochysia divergens (Pantanal, Brazil). Front Microbiol 2017; 8:1642. [PMID: 28932210 PMCID: PMC5592219 DOI: 10.3389/fmicb.2017.01642] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 08/14/2017] [Indexed: 12/17/2022] Open
Abstract
Endophytic actinomycetes from medicinal plants produce a wide diversity of secondary metabolites (SM). However, to date, the knowledge about endophytes from Brazil remains scarce. Thus, we analyzed the antimicrobial potential of 10 actinomycetes isolated from the medicinal plant Vochysia divergens located in the Pantanal sul-mato-grossense, an unexplored wetland in Brazil. Strains were classified as belonging to the Aeromicrobium, Actinomadura, Microbacterium, Microbispora, Micrococcus, Sphaerisporangium, Streptomyces, and Williamsia genera, through morphological and 16S rRNA phylogenetic analyzes. A susceptibility analysis demonstrated that the strains were largely resistant to the antibiotics oxacillin and nalidixic acid. Additionally, different culture media (SG and R5A), and temperatures (28 and 36°C) were evaluated to select the best culture conditions to produce the active SM. All conditions were analyzed for active metabolites, and the best antibacterial activity was observed from metabolites produced with SG medium at 36°C. The LGMB491 (close related to Aeromicrobium ponti) extract showed the highest activity against methicillin-resistant Staphylococcus aureus (MRSA), with a MIC of 0.04 mg/mL, and it was selected for SM identification. Strain LGMB491 produced 1-acetyl-β-carboline (1), indole-3-carbaldehyde (2), 3-(hydroxyacetyl)-indole (4), brevianamide F (5), and cyclo-(L-Pro-L-Phe) (6) as major compounds with antibacterial activity. In this study, we add to the knowledge about the endophytic community from the medicinal plant V. divergens and report the isolation of rare actinomycetes that produce highly active metabolites.
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Affiliation(s)
| | - Daiani C Savi
- Department of Genetics, Federal University of ParanáCuritiba, Brazil
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of KentuckyLexington, KY, United States.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of KentuckyLexington, KY, United States
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of KentuckyLexington, KY, United States.,Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of KentuckyLexington, KY, United States
| | - Rodrigo Aluizio
- Department of Genetics, Federal University of ParanáCuritiba, Brazil
| | - Yvelise M Possiede
- Department of Biology, Federal University of Mato Grosso do SulCampo Grande, Brazil
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of KentuckyLexington, KY, United States
| | - Chirlei Glienke
- Department of Genetics, Federal University of ParanáCuritiba, Brazil
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48
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Wang X, Elshahawi SI, Cai W, Zhang Y, Ponomareva LV, Chen X, Copley GC, Hower JC, Zhan CG, Parkin S, Rohr J, Van Lanen SG, Shaaban KA, Thorson JS. Bi- and Tetracyclic Spirotetronates from the Coal Mine Fire Isolate Streptomyces sp. LC-6-2. J Nat Prod 2017; 80:1141-1149. [PMID: 28358212 PMCID: PMC5558431 DOI: 10.1021/acs.jnatprod.7b00108] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The structures of 12 new "enantiomeric"-like abyssomicin metabolites (abyssomicins M-X) from Streptomyces sp. LC-6-2 are reported. Of this set, the abyssomicin W (11) contains an unprecedented 8/6/6/6 tetracyclic core, while the bicyclic abyssomicin X (12) represents the first reported naturally occurring linear spirotetronate. Metabolite structures were determined based on spectroscopic data and X-ray crystallography, and Streptomyces sp. LC-6-2 genome sequencing also revealed the corresponding putative biosynthetic gene cluster.
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Affiliation(s)
- 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
| | - 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
| | - Wenlong Cai
- Department of Pharmaceutical Sciences, College of Pharmacy, 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
| | - 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
| | - Xiabin Chen
- 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
| | - James C. Hower
- Center for Applied Energy Research, University of Kentucky, Lexington, Kentucky 40511, United States
| | - Chang-Guo Zhan
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Sean Parkin
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, United States
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Steven G. Van Lanen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Khaled A. Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, 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
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49
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Hughes RR, Shaaban KA, Zhang J, Cao H, Phillips GN, Thorson JS. OleD Loki as a Catalyst for Tertiary Amine and Hydroxamate Glycosylation. Chembiochem 2017; 18:363-367. [PMID: 28067448 PMCID: PMC5355705 DOI: 10.1002/cbic.201600676] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Indexed: 12/23/2022]
Abstract
We describe the ability of an engineered glycosyltransferase (OleD Loki) to catalyze the N-glycosylation of tertiary-amine-containing drugs and trichostatin hydroxamate glycosyl ester formation. As such, this study highlights the first bacterial model catalyst for tertiary-amine N-glycosylation and further expands the substrate scope and synthetic potential of engineered OleDs. In addition, this work could open the door to the discovery of similar capabilities among other permissive bacterial glycosyltransferases.
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Affiliation(s)
- Ryan R Hughes
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Khaled A Shaaban
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Jianjun Zhang
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
| | - Hongnan Cao
- Department of Chemistry, Rice University, P. O. Box 1892, MS 60, Houston, TX, 77251, USA
| | - George N Phillips
- Department of Chemistry, Rice University, P. O. Box 1892, MS 60, Houston, TX, 77251, USA
| | - Jon S Thorson
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY, 40536, USA
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50
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Elshahawi SI, Cao H, Shaaban KA, Ponomareva LV, Subramanian T, Farman ML, Spielmann HP, Phillips GN, Thorson JS, Singh S. Structure and specificity of a permissive bacterial C-prenyltransferase. Nat Chem Biol 2017; 13:366-368. [PMID: 28166207 PMCID: PMC5362326 DOI: 10.1038/nchembio.2285] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 12/01/2016] [Indexed: 11/21/2022]
Abstract
This study highlights the biochemical and structural characterization of the L-tryptophan C-6 C-prenyltransferase PriB from Streptomyces sp. RM-5-8. PriB was found to be uniquely permissive to a diverse array of prenyl donors and acceptors including the antibiotic daptomycin (Cubicin®). This study also highlights two additional PTs (FgaPT2 and CdpNPT) as catalysts for daptomycin prenylation where novel prenylated daptomycins also displayed improved antibacterial activities over the parent drug.
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Affiliation(s)
- Sherif I Elshahawi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA.,Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, Kentucky, USA
| | - Hongnan Cao
- Department of Biosciences, Rice University, Houston, Texas, USA
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA.,Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, Kentucky, USA
| | - Larissa V Ponomareva
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA.,Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, Kentucky, USA
| | - Thangaiah Subramanian
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky, USA
| | - Mark L Farman
- Department of Plant Pathology, University of Kentucky, Lexington, Kentucky, USA
| | - H Peter Spielmann
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, Kentucky, USA.,Department of Chemistry, Markey Cancer Center, Kentucky Center for Structural Biology, University of Kentucky, Lexington, Kentucky, USA
| | | | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, Kentucky, USA.,Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, Kentucky, USA
| | - Shanteri Singh
- Center for Pharmaceutical Research and Innovation (CPRI), University of Kentucky, Lexington, Kentucky, USA
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