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Haack PA, Harmrolfs K, Bader CD, Garcia R, Gunesch AP, Haid S, Popoff A, Voltz A, Kim H, Bartenschlager R, Pietschmann T, Müller R. Thiamyxins: Structure and Biosynthesis of Myxobacterial RNA-Virus Inhibitors. Angew Chem Int Ed Engl 2022; 61:e202212946. [PMID: 36208117 PMCID: PMC10100342 DOI: 10.1002/anie.202212946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Indexed: 11/07/2022]
Abstract
During our search for novel myxobacterial natural products, we discovered the thiamyxins: thiazole- and thiazoline-rich non-ribosomal peptide-polyketide hybrids with potent antiviral activity. We isolated four congeners of this unprecedented natural product family with the non-cyclized thiamyxin D fused to a glycerol unit at the C-terminus. Alongside their structure elucidation, we present a concise biosynthesis model based on biosynthetic gene cluster analysis and isotopically labelled precursor feeding. We report incorporation of a 2-(hydroxymethyl)-4-methylpent-3-enoic acid moiety by a GCN5-related N-acetyltransferase-like decarboxylase domain featuring polyketide synthase. The thiamyxins show potent inhibition of RNA viruses in cell culture models of corona, zika and dengue virus infection. Their potency up to a half maximal inhibitory concentration of 560 nM combined with milder cytotoxic effects on human cell lines indicate the potential for further development of the thiamyxins.
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Affiliation(s)
- Patrick A Haack
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Saarbrücken, Germany.,German center for infection research (DZIF), Braunschweig, Germany
| | - Kirsten Harmrolfs
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Saarbrücken, Germany.,German center for infection research (DZIF), Braunschweig, Germany
| | - Chantal D Bader
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Saarbrücken, Germany.,German center for infection research (DZIF), Braunschweig, Germany
| | - Ronald Garcia
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Saarbrücken, Germany.,German center for infection research (DZIF), Braunschweig, Germany
| | - Antonia P Gunesch
- Institute of Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany.,German Center for Infection Research, Hannover-Braunschweig Partner Site, and Cluster of Excellence RESIST (EXC 2155), Hannover, Germany
| | - Sibylle Haid
- Institute of Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany.,German Center for Infection Research, Hannover-Braunschweig Partner Site, and Cluster of Excellence RESIST (EXC 2155), Hannover, Germany
| | - Alexander Popoff
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Saarbrücken, Germany.,German center for infection research (DZIF), Braunschweig, Germany
| | - Alexander Voltz
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Saarbrücken, Germany.,German center for infection research (DZIF), Braunschweig, Germany
| | - Heeyoung Kim
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, German Center for Infection Research, Heidelberg Partner Site and Division of Virus-Associated Carcinogenesis, German Cancer Research Center (DKFZ), German Center for Infection Research (DZIF), Heidelberg, Germany
| | - Ralf Bartenschlager
- Department of Infectious Diseases, Molecular Virology, Heidelberg University, German Center for Infection Research, Heidelberg Partner Site and Division of Virus-Associated Carcinogenesis, German Cancer Research Center (DKFZ), German Center for Infection Research (DZIF), Heidelberg, Germany
| | - Thomas Pietschmann
- Institute of Experimental Virology, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany.,German Center for Infection Research, Hannover-Braunschweig Partner Site, and Cluster of Excellence RESIST (EXC 2155), Hannover, Germany
| | - Rolf Müller
- Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Saarbrücken, Germany.,German center for infection research (DZIF), Braunschweig, Germany
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Dissanayake AA, Wagner CM, Nair MG. Evaluation of health benefits of sea lamprey (Petromyzon marinus) isolates using in vitro antiinflammatory and antioxidant assays. PLoS One 2021; 16:e0259587. [PMID: 34731213 PMCID: PMC8565778 DOI: 10.1371/journal.pone.0259587] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/21/2021] [Indexed: 11/18/2022] Open
Abstract
Sea lamprey (Petromyzon marinus), a parasitic fish which survives on blood of other fishes, is consumed as a delicacy in many countries. Our earlier studies on sea lamprey compounds that showed potential to deter adult sea lampreys yielded several sterols, glycerides, free fatty acids, amino acids, organic acids and nitrogenous compounds. Therefore, this study was to assess the health-benefits of these compounds including additional isolates from HPLC fractions that kept aside due to lack of activity in sea lamprey deterrent assays. In vitro cyclooxygenase enzymes (COX-1 and -2) and lipid peroxidation (LPO) inhibitory assays, respectively, were used to determine antiinflammatory and antioxidant activities. Among the tested sterols, cholesteryl eicosapentaenoate and cholesteryl arachidonate exhibited IC50 values of 14.6 and 17.7 μg/mL for COX-1 and 17.3 and 20.8 μg/mL for COX-2, respectively. Cholesteryl palmitate and cholesteryl oleate showed moderate COX-1 and COX-2 enzyme inhibition at 25 μg/mL. Amino acids arginine, tyrosine, glutamic acid, tryptophan and asparagine also showed moderate COX-1 and COX-2 inhibition at the same concentration. Among the twelve new isolates from fractions that we did not investigate earlier, a novel uracil derivative petromyzonacil showed COX-1 and COX-2 inhibition at 25 μg/mL by 35 and 15%, respectively. Cholesterol esters tested at 25 μg/mL exhibited LPO inhibition between 38 and 82 percent. Amino acids cysteine, methionine, aspartic acid, threonine, tryptophan, histidine, glutamic acid, phenylalanine and tyrosine at 25 μg/mL showed LPO inhibition between 37 and 58% and petromyzonacil by 32%. These assay results indicate that consumption of sea lamprey offer health-benefits in addition to nutritional benefits.
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Affiliation(s)
- Amila A. Dissanayake
- Department of Horticulture, Michigan State University, East Lansing, Michigan, United States of America
| | - C. Michael Wagner
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, Michigan, United States of America
| | - Muraleedharan G. Nair
- Department of Horticulture, Michigan State University, East Lansing, Michigan, United States of America
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Primahana G, Risdian C, Mozef T, Wink J, Surup F, Stadler M. Amycolatomycins A and B, Cyclic Hexapeptides Isolated from an Amycolatopsis sp. 195334CR. Antibiotics (Basel) 2021; 10:261. [PMID: 33807584 PMCID: PMC8002008 DOI: 10.3390/antibiotics10030261] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 02/24/2021] [Accepted: 03/01/2021] [Indexed: 11/16/2022] Open
Abstract
The rare actinobacterium Amycolatopsis sp. strain 195334CR was found to produce previously undescribed cyclic hexapeptides, which we named amycolatomycin A and B (1 and 2). Their planar structures were determined by high-resolution mass spectrometry as well as extensive 1D and 2D NMR spectroscopy, while the absolute stereochemistry of its amino acids were determined by Marfey's method. Moreover, 1 and 2 differ by the incorporation of l-Ile and l-allo-Ile, respectively, whose FDVA (Nα-(2,4-Dinitro-5-fluorphenyl)-L-valinamide) derivatives were separated on a C4 column. Their hallmark in common is a unique 2,6-dichloro-tryptophan amino acid unit. Amycolatomycin A (1) exhibited weak activity against Bacillus subtilis DSM 10 (minimum inhibitory concentration (MIC) = 33.4 µg/mL).
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Affiliation(s)
- Gian Primahana
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (F.S.)
- Research Center for Chemistry, Indonesian Institute of Sciences (LIPI), Kawasan Puspiptek, Serpong, Tangerang Selatan 15314, Indonesia;
| | - Chandra Risdian
- Working Group Microbial Strain Collection, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (C.R.); (J.W.)
- Research Unit for Clean Technology, Indonesian Institute of Sciences (LIPI), Bandung 40135, Indonesia
| | - Tjandrawati Mozef
- Research Center for Chemistry, Indonesian Institute of Sciences (LIPI), Kawasan Puspiptek, Serpong, Tangerang Selatan 15314, Indonesia;
| | - Joachim Wink
- Working Group Microbial Strain Collection, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (C.R.); (J.W.)
| | - Frank Surup
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (F.S.)
| | - Marc Stadler
- Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstrasse 7, 38124 Braunschweig, Germany; (G.P.); (F.S.)
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Integrating Molecular Networking and 1H NMR Spectroscopy for Isolation of Bioactive Metabolites from the Persian Gulf Sponge Axinella sinoxea. Mar Drugs 2020; 18:md18070366. [PMID: 32708620 PMCID: PMC7404180 DOI: 10.3390/md18070366] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/10/2020] [Accepted: 07/13/2020] [Indexed: 12/19/2022] Open
Abstract
The geographic position, highly fluctuating sea temperatures and hypersalinity make Persian Gulf an extreme environment. Although this unique environment has high biodiversity dominated by invertebrates, its potential in marine biodiscovery has largely remained untapped. Herein, we aimed at a detailed analysis of the metabolome and bioactivity profiles of the marine sponge Axinella sinoxea collected from the northeast coast of the Persian Gulf in Iran. The crude extract and its Kupchan subextracts were tested in multiple in-house bioassays, and the crude extract and its CHCl3-soluble portion showed in vitro antibacterial activity against Methicillin-resistant Staphylococcus aureus (MRSA) and Enterococcus faecium (Efm). A molecular networking (MN)-based dereplication strategy by UPLC-MS/MS revealed the presence of phospholipids and steroids, while 1H NMR spectroscopy indicated the presence of additional metabolites, such as diketopiperazines (DKPs). Integrated MN and 1H NMR analyses on both the crude and CHCl3 extracts combined with an antibacterial activity-guided isolation approach afforded eight metabolites: a new diketopiperazine, (-)-cyclo(L-trans-Hyp-L-Ile) (8); a known diketopiperazine, cyclo(L-trans-Hyp-L-Phe) (7); two known phospholipids, 1-O-hexadecyl-sn-glycero-3-phosphocholine (1) and 1-O-octadecanoyl-sn-glycero-3-phosphocholine (2); two known steroids, 3β-hydroxycholest-5-ene-7,24-dione (3) and (22E)-3β-hydroxycholesta-5,22-diene-7,24-dione (4); two known monoterpenes, loliolide (5) and 5-epi-loliolide (6). The chemical structures of the isolates were elucidated by a combination of NMR spectroscopy, HRMS and [α]D analyses. All compounds were tested against MRSA and Efm, and compound 3 showed moderate antibacterial activity against MRSA (IC50 value 70 μg/mL). This is the first study that has dealt with chemical and bioactivity profiling of A.sinoxea leading to isolation and characterization of pure sponge metabolites.
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Oberheide A, Pflanze S, Stallforth P, Arndt HD. Solid-Phase-Based Total Synthesis and Stereochemical Assignment of the Cryptic Natural Product Aurantizolicin. Org Lett 2019; 21:729-732. [DOI: 10.1021/acs.orglett.8b03940] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ansgar Oberheide
- Friedrich-Schiller-Universität, Institut für Organische und Makromolekulare Chemie, Humboldtstr. 10, D-07743 Jena, Germany
| | - Sebastian Pflanze
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute (HKI), Chemistry of Microbial Communication, Beutenbergstr. 11A, D-07745 Jena, Germany
| | - Pierre Stallforth
- Leibniz Institute for Natural Product Research and Infection Biology, Hans Knöll Institute (HKI), Chemistry of Microbial Communication, Beutenbergstr. 11A, D-07745 Jena, Germany
| | - Hans-Dieter Arndt
- Friedrich-Schiller-Universität, Institut für Organische und Makromolekulare Chemie, Humboldtstr. 10, D-07743 Jena, Germany
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