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Demir Ö, Zeng H, Schulz B, Schrey H, Steinert M, Stadler M, Surup F. Bioactive Compounds from an Endophytic Pezicula sp. Showing Antagonistic Effects against the Ash Dieback Pathogen. Biomolecules 2023; 13:1632. [PMID: 38002314 PMCID: PMC10669340 DOI: 10.3390/biom13111632] [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: 09/20/2023] [Revised: 11/01/2023] [Accepted: 11/03/2023] [Indexed: 11/26/2023] Open
Abstract
A fungal endophyte originating from the Canary Islands was identified as a potent antagonist against the fungal phytopathogen Hymenoscyphus fraxineus, which causes the devastating ash dieback disease. This endophyte was tentatively identified as Pezicula cf. ericae, using molecular barcoding. Isolation of secondary metabolites by preparative high-performance liquid chromatography (HPLC) yielded the known compounds CJ-17,572 (1), mycorrhizin A (3) and cryptosporioptides A-C (4-6), besides a new N-acetylated dihydroxyphenylalanin derivative 2, named peziculastatin. Planar structures were elucidated by NMR and HRMS data, while the relative stereochemistry of 2 was assigned by H,H and C,H coupling constants. The assignment of the unknown stereochemistry of CJ-17,572 (1) was hampered by the broadening of NMR signals. Nevertheless, after semisynthetic conversion of 1 into its methyl derivatives 7 and 8, presumably preventing tautomeric effects, the relative configuration could be assigned, whereas comparison of ECD data to those of related compounds determined the absolute configuration. Metabolites 1 and 3 showed significant antifungal effects in vitro against H. fraxineus. Furthermore, 4-6 exhibited significant dispersive effects on preformed biofilms of S. aureus at concentrations up to 2 µg/mL, while the biofilm formation of C. albicans was also inhibited. Thus, cryptosporioptides might constitute a potential source for the development of novel antibiofilm agents.
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Affiliation(s)
- Özge Demir
- Department Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124 Braunschweig, Germany; (Ö.D.); (H.Z.); (H.S.); (M.S.)
| | - Haoxuan Zeng
- Department Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124 Braunschweig, Germany; (Ö.D.); (H.Z.); (H.S.); (M.S.)
| | - Barbara Schulz
- Institute of Microbiology, Technical University of Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany; (B.S.); (M.S.)
| | - Hedda Schrey
- Department Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124 Braunschweig, Germany; (Ö.D.); (H.Z.); (H.S.); (M.S.)
- Institute of Microbiology, Technical University of Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany; (B.S.); (M.S.)
| | - Michael Steinert
- Institute of Microbiology, Technical University of Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany; (B.S.); (M.S.)
| | - Marc Stadler
- Department Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124 Braunschweig, Germany; (Ö.D.); (H.Z.); (H.S.); (M.S.)
- Institute of Microbiology, Technical University of Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany; (B.S.); (M.S.)
| | - Frank Surup
- Department Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124 Braunschweig, Germany; (Ö.D.); (H.Z.); (H.S.); (M.S.)
- Institute of Microbiology, Technical University of Braunschweig, Spielmannstraße 7, 38106 Braunschweig, Germany; (B.S.); (M.S.)
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Pourmoghaddam MJ, Ekiz G, Lambert C, Surup F, Primahana G, Wittstein K, Khodaparast SA, Voglmayr H, Krisai-greilhuber I, Stradal TEB, Stadler M. Studies on the secondary metabolism of Rosellinia and Dematophora strains (Xylariaceae) from Iran. Mycol Prog 2022; 21. [DOI: 10.1007/s11557-022-01816-x] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
AbstractThe xylariaceous genus Dematophora has recently been resurrected and segregated from Rosellinia based on a molecular phylogeny and morphological characters. This was an important taxonomic change because Dematophora in the current sense contains several important pathogens, while Rosellinia is limited to mainly saprotrophic species that have an endophytic stage in their life cycle and may even have beneficial effects on the host plants. During our ongoing work on the functional biodiversity of the Xylariales, we have encountered new strains of rosellinoid Xylariaceae from Iran and have studied their mycelial cultures for secondary metabolites in an attempt to establish further chemotaxonomic affinities. In the process, we isolated and identified 13 compounds, of which rosellisteroid (1), the cichorine derivative 2, and the alkaloid 3 are new. Out of these, nine were tested for their antimicrobial affinities with cytochalasin E (6) exhibiting weak activity against Schizosaccharomyces pombe. The cytotoxicity of three cytochalasin derivatives was examined and their effects on the F-actin cytoskeletal organization studied by fluorescence microscopy using fluorescent phalloidin. Cytochalasin E (6) and Δ6,12-cytochalasin E (7) showed strong and irreversible action on actin, while cytochalasin K (8) exhibited weaker, reversible effects.
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Zhabinskii VN, Drasar P, Khripach VA. Structure and Biological Activity of Ergostane-Type Steroids from Fungi. Molecules 2022; 27:2103. [PMID: 35408501 PMCID: PMC9000798 DOI: 10.3390/molecules27072103] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [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: 02/28/2022] [Revised: 03/22/2022] [Accepted: 03/23/2022] [Indexed: 12/24/2022] Open
Abstract
Mushrooms are known not only for their taste but also for beneficial effects on health attributed to plethora of constituents. All mushrooms belong to the kingdom of fungi, which also includes yeasts and molds. Each year, hundreds of new metabolites of the main fungal sterol, ergosterol, are isolated from fungal sources. As a rule, further testing is carried out for their biological effects, and many of the isolated compounds exhibit one or another activity. This study aims to review recent literature (mainly over the past 10 years, selected older works are discussed for consistency purposes) on the structures and bioactivities of fungal metabolites of ergosterol. The review is not exhaustive in its coverage of structures found in fungi. Rather, it focuses solely on discussing compounds that have shown some biological activity with potential pharmacological utility.
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Affiliation(s)
- Vladimir N. Zhabinskii
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich Str., 5/2, 220141 Minsk, Belarus;
| | - Pavel Drasar
- Department of Chemistry of Natural Compounds, University of Chemistry and Technology, Technicka 5, CZ-166 28 Prague, Czech Republic;
| | - Vladimir A. Khripach
- Institute of Bioorganic Chemistry, National Academy of Sciences of Belarus, Kuprevich Str., 5/2, 220141 Minsk, Belarus;
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Nawrot-chorabik K, Marcol-rumak N, Latowski D. Investigation of the Biocontrol Potential of Two Ash Endophytes against Hymenoscyphus fraxineus Using In Vitro Plant–Fungus Dual Cultures. Forests 2021; 12:1750. [DOI: 10.3390/f12121750] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Development of effective biocontrol procedures using ash endophytes to combat an ash pathogen Hymenoscyphus fraxineus would be an appropriate contribution to the ongoing effort to protect European ash stands against ash decline. In this study we investigated the biocontrol potential of two ash endophytes, Thielavia basicola and Minimidochium sp., against H. fraxineus using in vitro plant-fungus and fungus-fungus dual cultures approach in three biocontrol models. The tests aimed to determine whether the endophytes show antagonism toward Fraxinus excelsior and F. pennsylvanica, to assess the level of antagonism of the endophytes toward H. fraxineus and to identify potential secondary metabolites induced by the presence of H. fraxineus. The results that dual culture experiments modeled according to our design may be a very useful tool to precisely study biocontrol potential of fungi, i.e., without the impact of environmental factors. Such experiments also enable the selection of most resistant ash genotypes and rapid propagation, producing large numbers of pathogen-free seedlings. It should be noted, however, that both of the endophytes tested in the dual cultures strongly inhibited the growth of H. fraxineus. Their growth under the influence of callus/seedlings was also inhibited. Comparison of HPLC profiles showed that the presence of H. fraxineus in the post-culture medium induced the production of an unknown secondary metabolite in this species. Such results suggest that some of the plant–fungus combinations examined in this study may have potential to be developed as biocontrol methods, thus increasing the survivability of ash stands under natural conditions.
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Elfstrand M, Chen J, Cleary M, Halecker S, Ihrmark K, Karlsson M, Davydenko K, Stenlid J, Stadler M, Durling MB. Comparative analyses of the Hymenoscyphus fraxineus and Hymenoscyphus albidus genomes reveals potentially adaptive differences in secondary metabolite and transposable element repertoires. BMC Genomics 2021; 22:503. [PMID: 34217229 PMCID: PMC8254937 DOI: 10.1186/s12864-021-07837-2] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 06/24/2021] [Indexed: 11/29/2022] Open
Abstract
Background The dieback epidemic decimating common ash (Fraxinus excelsior) in Europe is caused by the invasive fungus Hymenoscyphus fraxineus. In this study we analyzed the genomes of H. fraxineus and H. albidus, its native but, now essentially displaced, non-pathogenic sister species, and compared them with several other members of Helotiales. The focus of the analyses was to identify signals in the genome that may explain the rapid establishment of H. fraxineus and displacement of H. albidus. Results The genomes of H. fraxineus and H. albidus showed a high level of synteny and identity. The assembly of H. fraxineus is 13 Mb longer than that of H. albidus’, most of this difference can be attributed to higher dispersed repeat content (i.e. transposable elements [TEs]) in H. fraxineus. In general, TE families in H. fraxineus showed more signals of repeat-induced point mutations (RIP) than in H. albidus, especially in Long-terminal repeat (LTR)/Copia and LTR/Gypsy elements. Comparing gene family expansions and 1:1 orthologs, relatively few genes show signs of positive selection between species. However, several of those did appeared to be associated with secondary metabolite genes families, including gene families containing two of the genes in the H. fraxineus-specific, hymenosetin biosynthetic gene cluster (BGC). Conclusion The genomes of H. fraxineus and H. albidus show a high degree of synteny, and are rich in both TEs and BGCs, but the genomic signatures also indicated that H. albidus may be less well equipped to adapt and maintain its ecological niche in a rapidly changing environment. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07837-2.
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Affiliation(s)
- Malin Elfstrand
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Almas Allé 5, Box 7026, SE-750 07, Uppsala, Sweden.
| | - Jun Chen
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Almas Allé 5, Box 7026, SE-750 07, Uppsala, Sweden.,Systematic & Evolutionary Botany and Biodiversity group, MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, Hangzhou, Zhejiang, China
| | - Michelle Cleary
- Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences, Sundsvägen 3, Box 49, SE-230 53, Alnarp, Sweden
| | - Sandra Halecker
- Dept. Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, D-38124, Braunschweig, Germany
| | - Katarina Ihrmark
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Almas Allé 5, Box 7026, SE-750 07, Uppsala, Sweden
| | - Magnus Karlsson
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Almas Allé 5, Box 7026, SE-750 07, Uppsala, Sweden
| | - Kateryna Davydenko
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Almas Allé 5, Box 7026, SE-750 07, Uppsala, Sweden.,Ukrainian research Institute of Forestry and Forest Melioration, 62458, Kharkov, Ukraine
| | - Jan Stenlid
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Almas Allé 5, Box 7026, SE-750 07, Uppsala, Sweden
| | - Marc Stadler
- Dept. Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, D-38124, Braunschweig, Germany
| | - Mikael Brandström Durling
- Department of Forest Mycology and Plant Pathology, Swedish University of Agricultural Sciences, Almas Allé 5, Box 7026, SE-750 07, Uppsala, Sweden
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Hosoya T. Systematics, ecology, and application of Helotiales: Recent progress and future perspectives for research with special emphasis on activities within Japan. MYCOSCIENCE 2021; 62:1-9. [PMID: 37090017 PMCID: PMC9157779 DOI: 10.47371/mycosci.2020.05.002] [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] [Received: 03/05/2020] [Revised: 05/12/2020] [Accepted: 05/13/2020] [Indexed: 11/16/2022]
Abstract
Helotiales is one of the most diverse groups of apothecial ascomycetes, including 3000-4000 taxa. Recent progress in the systematics, ecology, and their applications through research is herein reviewed based on the experiences of the author with a special emphasis on activities in Japan. In the past 30 y, more than 50 helotialean taxa have been added to the mycobiota of Japan, including new taxa. With the advent of molecular phylogeny, some families have been revisited, such as members with stroma (Sclerotiniaceae and Rutstroemiaceae) or hairs (Hyaloscyphaceae and Lachnaceae). Although the monophyly of Helotiales has not yet been demonstrated, our understanding of its phylogeny has greatly advanced. The unexpected ecological nature represented by endophytism has been revealed through barcoding and other molecular techniques. The research history of ash dieback is also reviewed, and the endophytism/saprophytism of the pathogen on its original host is discussed. Drug discoveries within Helotiales are reviewed, and successful examples are presented. As future perspectives, both the cumulation of occurrence and sequence data of Helotiales is greatly encouraged to elucidate this important group of fungi.
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Becker K, Pfütze S, Kuhnert E, Cox RJ, Stadler M, Surup F. Hybridorubrins A-D: Azaphilone Heterodimers from Stromata of Hypoxylon fragiforme and Insights into the Biosynthetic Machinery for Azaphilone Diversification. Chemistry 2021; 27:1438-1450. [PMID: 32748960 PMCID: PMC7898651 DOI: 10.1002/chem.202003215] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [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: 07/07/2020] [Indexed: 12/14/2022]
Abstract
The diversity of azaphilones in stromatal extracts of the fungus Hypoxylon fragiforme was investigated and linked to their biosynthetic machineries by using bioinformatics. Nineteen azaphilone-type compounds were isolated and characterized by NMR spectroscopy and mass spectrometry, and their absolute stereoconfigurations were assigned by using Mosher ester analysis and electronic circular dichroism spectroscopy. Four unprecedented bis-azaphilones, named hybridorubrins A-D, were elucidated, in addition to new fragirubrins F and G and various known mitorubrin derivatives. Only the hybridorubrins, which are composed of mitorubrin and fragirubrin moieties, exhibited strong inhibition of Staphylococcus aureus biofilm formation. Analysis of the genome of H. fragiforme revealed the presence of two separate biosynthetic gene clusters (BGCs) hfaza1 and hfaza2 responsible for azaphilone formation. While the hfaza1 BGC likely encodes the assembly of the backbone and addition of fatty acid moieties to yield the (R)-configured series of fragirubrins, the hfaza2 BGC contains the necessary genes to synthesise the widely distributed (S)-mitorubrins. This study is the first example of two distant cross-acting fungal BGCs collaborating to produce two families of azaphilones and bis-azaphilones derived therefrom.
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Affiliation(s)
- Kevin Becker
- Department Microbial DrugsHelmholtz Centre for Infection Research GmbH (HZI)Inhoffenstrasse 738124BraunschweigGermany
- German Centre for Infection Research Association (DZIF)Partner site Hannover-BraunschweigInhoffenstrasse 738124BraunschweigGermany
| | - Sebastian Pfütze
- Department Microbial DrugsHelmholtz Centre for Infection Research GmbH (HZI)Inhoffenstrasse 738124BraunschweigGermany
- German Centre for Infection Research Association (DZIF)Partner site Hannover-BraunschweigInhoffenstrasse 738124BraunschweigGermany
| | - Eric Kuhnert
- Institute for Organic ChemistryLeibniz University HannoverSchneiderberg 1B30167HannoverGermany
- Centre for Biomolecular Drug Research (BMWZ)Schneiderberg 3830167HannoverGermany
| | - Russell J. Cox
- Institute for Organic ChemistryLeibniz University HannoverSchneiderberg 1B30167HannoverGermany
- Centre for Biomolecular Drug Research (BMWZ)Schneiderberg 3830167HannoverGermany
| | - Marc Stadler
- Department Microbial DrugsHelmholtz Centre for Infection Research GmbH (HZI)Inhoffenstrasse 738124BraunschweigGermany
- German Centre for Infection Research Association (DZIF)Partner site Hannover-BraunschweigInhoffenstrasse 738124BraunschweigGermany
| | - Frank Surup
- Department Microbial DrugsHelmholtz Centre for Infection Research GmbH (HZI)Inhoffenstrasse 738124BraunschweigGermany
- German Centre for Infection Research Association (DZIF)Partner site Hannover-BraunschweigInhoffenstrasse 738124BraunschweigGermany
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Anoumedem EGM, Mountessou BYG, Kouam SF, Narmani A, Surup F. Simplicilones A and B Isolated from the Endophytic Fungus Simplicillium subtropicum SPC3. Antibiotics (Basel) 2020; 9:E753. [PMID: 33138149 DOI: 10.3390/antibiotics9110753] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 10/26/2020] [Accepted: 10/27/2020] [Indexed: 12/23/2022] Open
Abstract
Two new tetracyclic polyketides with a spirocenter, simplicilones A (1) and B (2) were isolated from the broth-culture of the endophytic fungus Simplicilliumsubtropicum (SPC3) in the course of our screening for new bioactive secondary metabolites. This endophytoic fungus is naturally harboured in the fresh bark of the Cameroonian medicinal plant Duguetia staudtii (Engl. and Diels) Chatrou. The planar structures of the simplicilones were elucidated by MS and 1D as well as 2D NMR spectroscopic techniques. The relative configuration was assigned by NOESY experiments in conjunction with coupling constants; subsequently, the absolute configurations were assigned by the modified Mosher’s method. The compounds showed weak cytotoxic effects against the cell line KB3.1 (in vitro cytotoxicity (IC50) = 25 µg/mL for 1, 29 µg/mL for 2), but were inactive against the tested Gram-positive and Gram-negative bacteria as well as fungi.
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Surup F, Minh Thi Tran T, Pfütze S, Budde J, Moussa-Ayoub TE, Rohn S, Jerz G. Opuntisines, 14-membered cyclopeptide alkaloids from fruits of Opuntia stricta var. dillenii isolated by high-performance countercurrent chromatography. Food Chem 2020; 334:127552. [PMID: 32795786 DOI: 10.1016/j.foodchem.2020.127552] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 06/05/2020] [Accepted: 07/08/2020] [Indexed: 01/25/2023]
Abstract
Extracts of Opuntia stricta var. dillenii fruits were fractionated by semi-preparative high-performance countercurrent chromatography (HPCCC) to study the secondary metabolite formation, whereby HPCCC showed a superior separation capacity to fractionate minor metabolites compared to HPLC. A family of new peptides was detected in semi-polar fractions when monitoring the HPCCC separation by off-line injections of fractions to ESI-MS/MS. Planar structures of the major compounds, two 14-ring-membered cyclopeptide alkaloids, which were named opuntisines A and B, were elucidated by 1D- and 2D-NMR spectroscopy and HR-ESI-MS/MS spectrometry, while a combination of chemical derivatisation and degradation revealed the stereo-configurations. Specifically, the methods of Marfey and Mosher indicated l-Glu, l-Ile, l-Phe and 1S-configurations, respectively; ROESY correlations revealed 8S, 9S. The novel opuntisine A showed moderate activity against the Gram-negative bacterium Escherichia coli, but no further antibacterial, antifungal nor cytotoxic effects. This bioactive natural product class is reported for the first time in the plant family Cactaceae.
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Affiliation(s)
- Frank Surup
- Helmholtz Centre for Infection Research, Department Microbial Drugs, Inhoffenstrasse 7, 38124 Braunschweig, Germany; German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany.
| | - Thu Minh Thi Tran
- Institute of Food Chemistry, Technische Universität Braunschweig, Schleinitzstrasse 20, 38106 Braunschweig, Germany; Food Technology and Biotechnology Department, Can Tho University of Technology, Can Tho, Viet Nam
| | - Sebastian Pfütze
- Helmholtz Centre for Infection Research, Department Microbial Drugs, Inhoffenstrasse 7, 38124 Braunschweig, Germany; German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Jarmo Budde
- Institute of Food Chemistry, Technische Universität Braunschweig, Schleinitzstrasse 20, 38106 Braunschweig, Germany
| | - Tamer E Moussa-Ayoub
- Food Technology Department, Agriculture Faculty, Suez Canal University, 41522 Ismailia, Egypt
| | - Sascha Rohn
- Institute of Food Chemistry, Hamburg School of Food Science, University of Hamburg, 20146 Hamburg, Germany
| | - Gerold Jerz
- Institute of Food Chemistry, Technische Universität Braunschweig, Schleinitzstrasse 20, 38106 Braunschweig, Germany.
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Himstedt R, Wagner S, Jaeger RJR, Lieunang Watat M, Backenköhler J, Rupcic Z, Stadler M, Spiteller P. Formaldehyde as a Chemical Defence Agent of Fruiting Bodies of Mycena rosea and its Role in the Generation of the Alkaloid Mycenarubin C. Chembiochem 2020; 21:1613-1620. [PMID: 31972067 PMCID: PMC7318143 DOI: 10.1002/cbic.201900733] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Indexed: 12/25/2022]
Abstract
Mycenarubin C, a previously unknown red pyrroloquinoline alkaloid, was isolated from fruiting bodies of the mushroom Mycena rosea and its structure was elucidated mainly by NMR spectroscopy and mass spectrometry. Unlike mycenarubin A, the major pyrroloquinoline alkaloid in fruiting bodies of M. rosea, mycenarubin C, contains an eight-membered ring with an additional C1 unit that is hitherto unprecedented for pyrroloquinoline alkaloids known in nature. Incubation of mycenarubin A with an excess of formaldehyde revealed that mycenarubin C was generated nearly quantitatively from mycenarubin A. An investigation into the formaldehyde content of fresh fruiting bodies of M. rosea showed the presence of considerable amounts of formaldehyde, with values of 5 μg per gram of fresh weight in fresh fruiting bodies. Although mycenarubin C did not show bioactivity against selected bacteria and fungi, formaldehyde inhibits the growth of the mycoparasite Spinellus fusiger at concentrations present in fruiting bodies of M. rosea. Therefore, formaldehyde might play an ecological role in the chemical defence of M. rosea against S. fusiger. In turn, S. fusiger produces gallic acid-presumably to detoxify formaldehyde by reaction of this aldehyde with amino acids and gallic acid to Mannich adducts.
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Affiliation(s)
- Rieke Himstedt
- Institut für Organische und Analytische ChemieUniversität BremenLeobener Strasse 728359BremenGermany
| | - Silke Wagner
- Institut für Organische und Analytische ChemieUniversität BremenLeobener Strasse 728359BremenGermany
| | - Robert J. R. Jaeger
- Institut für Organische und Analytische ChemieUniversität BremenLeobener Strasse 728359BremenGermany
| | | | - Jana Backenköhler
- Institut für Organische und Analytische ChemieUniversität BremenLeobener Strasse 728359BremenGermany
| | - Zeljka Rupcic
- Mikrobielle WirkstoffeHelmholtz-Zentrum für InfektionsforschungInhoffenstrasse 738124BraunschweigGermany
| | - Marc Stadler
- Mikrobielle WirkstoffeHelmholtz-Zentrum für InfektionsforschungInhoffenstrasse 738124BraunschweigGermany
| | - Peter Spiteller
- Institut für Organische und Analytische ChemieUniversität BremenLeobener Strasse 728359BremenGermany
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Halecker S, Wennrich JP, Rodrigo S, Andrée N, Rabsch L, Baschien C, Steinert M, Stadler M, Surup F, Schulz B. Fungal endophytes for biocontrol of ash dieback: The antagonistic potential of Hypoxylon rubiginosum. FUNGAL ECOL 2020. [DOI: 10.1016/j.funeco.2020.100918] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Khodamoradi S, Stadler M, Wink J, Surup F. Litoralimycins A and B, New Cytotoxic Thiopeptides from Streptomonospora sp. M2. Mar Drugs 2020; 18:md18060280. [PMID: 32466459 PMCID: PMC7345755 DOI: 10.3390/md18060280] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 05/18/2020] [Accepted: 05/20/2020] [Indexed: 11/23/2022] Open
Abstract
Streptomonospora sp. M2 has been isolated from a soil sample collected at the Wadden Sea beach in our ongoing program aimed at the isolation of rare Actinobacteria, ultimately targeting the discovery of new antibiotics. Because crude extracts derived from cultures of this strain showed inhibitory activity against the indicator organism Bacillus subtilis, it was selected for further analysis. HPLC–MS analysis of its culture broth revealed the presence of lipophilic metabolites. The two major metabolites of those were isolated by preparative reversed-phase HPLC and preparative TLC. Their planar structures were elucidated using high-resolution electrospray ionization mass spectrometry (HRESIMS), 1D and 2D NMR data as new thiopeptide antibiotics and named litoralimycin A (1) and B (2). Although rotating frame nuclear Overhauser effect spectroscopy (ROESY) data established a Z configuration of the Δ21,26 double bond, the stereochemistry of C-5 and C-15 were assigned as S by Marfey’s method after ozonolysis. The biological activity spectrum of 1 and 2 is highly uncommon for thiopeptide antibiotics, since they showed only insignificant antibacterial activity, but 1 showed strong cytotoxic effects.
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Affiliation(s)
- Shadi Khodamoradi
- Microbial Strain Collection, Helmholtz-Centre for Infection Research (HZI), Inhoffenstr. 7, 38124 Braunschweig, Germany;
- German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, 38124 Braunschweig, Germany;
| | - Marc Stadler
- German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, 38124 Braunschweig, Germany;
- Microbial Drugs Department, Helmholtz-Centre for Infection Research (HZI), Inhoffenstr. 7, 38124 Braunschweig, Germany
| | - Joachim Wink
- Microbial Strain Collection, Helmholtz-Centre for Infection Research (HZI), Inhoffenstr. 7, 38124 Braunschweig, Germany;
- German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, 38124 Braunschweig, Germany;
- Correspondence: (J.W.); (F.S.); Tel.: +49-351-6181-4223 (J.W.); +49-351-6181-4256 (F.S.)
| | - Frank Surup
- German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, 38124 Braunschweig, Germany;
- Microbial Drugs Department, Helmholtz-Centre for Infection Research (HZI), Inhoffenstr. 7, 38124 Braunschweig, Germany
- Correspondence: (J.W.); (F.S.); Tel.: +49-351-6181-4223 (J.W.); +49-351-6181-4256 (F.S.)
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Hosoya T. WITHDRAWN: Systematics, ecology, and application of Helotiales: Recent progress and future perspectives for research with special emphasis activities within Japan. MYCOSCIENCE 2020. [DOI: 10.1016/j.myc.2020.05.002] [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: 10/24/2022]
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14
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Pourmoghaddam MJ, Lambert C, Surup F, Khodaparast SA, Krisai-Greilhuber I, Voglmayr H, Stadler M. Discovery of a new species of the Hypoxylon rubiginosum complex from Iran and antagonistic activities of Hypoxylon spp. against the Ash Dieback pathogen, Hymenoscyphus fraxineus, in dual culture. MycoKeys 2020; 66:105-133. [PMID: 32377154 PMCID: PMC7195382 DOI: 10.3897/mycokeys.66.50946] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 02/17/2020] [Accepted: 03/17/2020] [Indexed: 11/13/2022] Open
Abstract
During a survey of xylarialean fungi in Northern Iran, several specimens that showed affinities to the Hypoxylonrubiginosum complex were collected and cultured. A comparison of their morphological characters, combined with a chemotaxonomic study based on high performance liquid chromatography, coupled with diode array detection and mass spectrometry (HPLC-DAD/MS) and a multi-locus phylogeny based on ITS, LSU, rbp2 and tub2 DNA sequences, revealed a new species here described as Hypoxylonguilanense. In addition, Hypoxylonrubiginosumsensu stricto was also encountered. Concurrently, an endophytic isolate of the latter species showed strong antagonistic activities against the Ash Dieback pathogen, Hymenoscyphusfraxineus, in a dual culture assay in our laboratory. Therefore, we decided to test the new Iranian fungi for antagonistic activities against the pathogen, along with several cultures of other Hypoxylon species that are related to H.rubiginosum. Our results suggest that the antagonistic effects of Hypoxylon spp. against Hym.fraxineus are widespread and that they are due to the production of antifungal phomopsidin derivatives in the presence of the pathogen.
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Affiliation(s)
- Mohammad Javad Pourmoghaddam
- Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran Helmholtz-Zentrum für Infektionsforschung GmbH Braunschweig Germany.,Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, 1030, Wien, Austria University of Guilan Rasht Islamic Republic of Iran.,Helmholtz-Zentrum für Infektionsforschung GmbH, Dept. Microbial Drugs, Inhoffenstrasse 7, 38124, Braunschweig, Germany University of Vienna Vienna Austria
| | - Christopher Lambert
- Helmholtz-Zentrum für Infektionsforschung GmbH, Dept. Microbial Drugs, Inhoffenstrasse 7, 38124, Braunschweig, Germany University of Vienna Vienna Austria
| | - Frank Surup
- Helmholtz-Zentrum für Infektionsforschung GmbH, Dept. Microbial Drugs, Inhoffenstrasse 7, 38124, Braunschweig, Germany University of Vienna Vienna Austria
| | - Seyed Akbar Khodaparast
- Department of Plant Protection, Faculty of Agricultural Sciences, University of Guilan, Rasht, Iran Helmholtz-Zentrum für Infektionsforschung GmbH Braunschweig Germany
| | - Irmgard Krisai-Greilhuber
- Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, 1030, Wien, Austria University of Guilan Rasht Islamic Republic of Iran
| | - Hermann Voglmayr
- Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, 1030, Wien, Austria University of Guilan Rasht Islamic Republic of Iran.,Institute of Forest Entomology, Forest Pathology and Forest Protection, Department of Forest and Soil Sciences, BOKU-University of Natural Resources and Life Sciences, Franz-Schwackhöfer-Haus, Peter-Jordan-Straße 82/I, 1190, Vienna, Austria BOKU-University of Natural Resources and Life Sciences Vienna Austria
| | - Marc Stadler
- Helmholtz-Zentrum für Infektionsforschung GmbH, Dept. Microbial Drugs, Inhoffenstrasse 7, 38124, Braunschweig, Germany University of Vienna Vienna Austria
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Wang W, Yang YP, Tasneem S, Daniyal M, Zhang L, Jia YZ, Jian YQ, Li B. Lanostane tetracyclic triterpenoids as important sources for anti-inflammatory drug discovery. World J Tradit Chin Med 2020. [DOI: 10.4103/wjtcm.wjtcm_17_20] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Masi M, Di Lecce R, Tuzi A, Linaldeddu BT, Montecchio L, Maddau L, Evidente A. Hyfraxinic Acid, a Phytotoxic Tetrasubstituted Octanoic Acid, Produced by the Ash ( Fraxinus excelsior L.) Pathogen Hymenoscyphus fraxineus Together with Viridiol and Some of Its Analogues. J Agric Food Chem 2019; 67:13617-13623. [PMID: 31661270 DOI: 10.1021/acs.jafc.9b06055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A new tetrasubstituted octanoic acid, named hyfraxinic acid (1), was isolated together with known 1-deoxyviridiol (2), viridiol (3), nodulisporiviridin M (4), and demethoxyviridiol (5) from the organic extract of Hymenoscyphus fraxineus responsible for ash (Fraxinus excelsior L.) dieback in Europe. Hyfraxinic acid (1) was characterized, using spectroscopic methods, as 2,4-dihydroxy-7-methyl-6-methyleneoctanoic acid. Furthermore, the advanced Mosher method was used to determine the absolute configuration (3R) of 1-deoxyviridiol. Nodulisporiviridin M (4) was isolated for the first time from H. fraxineus. The phytotoxicity of each compound was tested by a leaf puncture assay on Celtis australis L., Quercus suber L., Hedera elix L., Juglans regia L., and Fraxinus angustifolia L. leaves. Compounds 1, 3, and 5 exhibited remarkable phytotoxicity on all plants tested, inducing necrotic lesions at concentrations of 1.0 and 0.5 mg/mL, while compounds 2 and 4 were found to be inactive in this bioassay. These results could contribute to a deeper understanding of the pathogenicity of H. fraxineus.
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Affiliation(s)
- Marco Masi
- Dipartimento Scienze Chimiche , Università di Napoli Federico II , Complesso Universitario Monte S. Angelo, Via Cintia 4 , 80126 Napoli , Italy
| | - Roberta Di Lecce
- Dipartimento Scienze Chimiche , Università di Napoli Federico II , Complesso Universitario Monte S. Angelo, Via Cintia 4 , 80126 Napoli , Italy
| | - Angela Tuzi
- Dipartimento Scienze Chimiche , Università di Napoli Federico II , Complesso Universitario Monte S. Angelo, Via Cintia 4 , 80126 Napoli , Italy
| | - Benedetto Teodoro Linaldeddu
- Dipartimento Territorio e Sistemi Agro-Forestali , Università di Padova , Viale dell'Università 16 , 35020 Legnaro , Italy
| | - Lucio Montecchio
- Dipartimento Territorio e Sistemi Agro-Forestali , Università di Padova , Viale dell'Università 16 , 35020 Legnaro , Italy
| | - Lucia Maddau
- Dipartimento di Agraria, Sezione di Patologia Vegetale ed Entomologia , Università degli Studi di Sassari , Viale Italia 39 , 07100 Sassari , Italy
| | - Antonio Evidente
- Dipartimento Scienze Chimiche , Università di Napoli Federico II , Complesso Universitario Monte S. Angelo, Via Cintia 4 , 80126 Napoli , Italy
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Surup F, Hennicke F, Sella N, Stroot M, Bernecker S, Pfütze S, Stadler M, Rühl M. New terpenoids from the fermentation broth of the edible mushroom Cyclocybe aegerita. Beilstein J Org Chem 2019; 15:1000-1007. [PMID: 31164938 PMCID: PMC6541320 DOI: 10.3762/bjoc.15.98] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/18/2019] [Indexed: 12/02/2022] Open
Abstract
The strophariaceous basidiomycete Cyclocybe aegerita (synonyms Agrocybe aegerita and A. cylindracea) is one of the most praised cultivated edible mushrooms and is being cultivated at large scale for food production. Furthermore, the fungus serves as a model organism to study fruiting body formation and the production of secondary metabolites during the life cycle of Basidiomycota. By studying the secondary metabolite profiles of C. aegerita, we found several terpenoids in submerged cultures. Aside from the main metabolite, bovistol (1), two new bovistol derivatives B and C (2, 3) and pasteurestin C as a new protoilludane (4) were isolated by preparative HPLC. Their structures were elucidated by mass spectrometry and NMR spectroscopy. The relative configurations of 2–4 were assigned by ROESY correlations, and 3JH,H coupling constants in the case of 4. Applying quantitative PCR for gene expression validation, we linked the production of bovistol and its derivatives to the respective biosynthesis gene clusters.
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Affiliation(s)
- Frank Surup
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany.,German Centre for Infection Research Association (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Florian Hennicke
- Junior Research Group Genetics and Genomics of Fungi, Senckenberg Gesellschaft für Naturforschung, Georg-Voigt-Str. 14-16, 60325 Frankfurt am Main, Germany
| | - Nadine Sella
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Giessen, Germany
| | - Maria Stroot
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany.,German Centre for Infection Research Association (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Steffen Bernecker
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany.,German Centre for Infection Research Association (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Sebastian Pfütze
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany.,German Centre for Infection Research Association (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Marc Stadler
- Microbial Drugs, Helmholtz Centre for Infection Research GmbH (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany.,German Centre for Infection Research Association (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Martin Rühl
- Institute of Food Chemistry and Food Biotechnology, Justus Liebig University Giessen, Giessen, Germany.,Fraunhofer Institute for Molecular Biology and Applied Ecology IME Business Area Bioresources, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
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Ma K, Zhang P, Tao Q, Keller NP, Yang Y, Yin WB, Liu H. Characterization and Biosynthesis of a Rare Fungal Hopane-Type Triterpenoid Glycoside Involved in the Antistress Property of Aspergillus fumigatus. Org Lett 2019; 21:3252-3256. [DOI: 10.1021/acs.orglett.9b00984] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ke Ma
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Peng Zhang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
| | - Qiaoqiao Tao
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
| | - Nancy P. Keller
- Department of Medical Microbiology and Immunology, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Yanlong Yang
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Wen-Bing Yin
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Hongwei Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
- Savaid Medical School, University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
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