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Chen Y, Ren J, Yang R, Li J, Huang SX, Yan Y. Isolation and biosynthesis of daturamycins from Streptomyces sp. KIB-H1544. Beilstein J Org Chem 2022; 18:1009-1016. [PMID: 36051563 PMCID: PMC9379647 DOI: 10.3762/bjoc.18.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 07/25/2022] [Indexed: 11/23/2022] Open
Abstract
Two novel diarylcyclopentenones daturamycin A and B (1 and 2), and one new p-terphenyl daturamycin C (3), along with three known congeners (4–6), were isolated from a rhizosphere soil-derived Streptomyces sp. KIB-H1544. The structures of new compounds were elucidated via a joint use of spectroscopic analyses and single-crystal X-ray diffractions. Compounds 1 and 2 belong to a rare class of tricyclic 6/5/6 diarylcyclopentenones, and compounds 3–6 possess a C-18 tricyclic aromatic skeleton. The biosynthetic gene cluster of daturamycins was identified through gene knockout and biochemical characterization experiments and the biosynthetic pathway of daturamycins was proposed.
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Affiliation(s)
- Yin Chen
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jinqiu Ren
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Ruimin Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Jie Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Sheng-Xiong Huang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Yijun Yan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and CAS Center for Excellence in Molecular Plant Sciences, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
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2
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Song J, Xu K, Liu C, Wang T, Luan X, Zhu L, Chu Z, Fu X, Chang W, Wang X, Lou H. Bioactive specialised metabolites from the endophytic fungus Xylaria sp. of Cudrania tricuspidata. PHYTOCHEMISTRY 2022; 196:113079. [PMID: 34995881 DOI: 10.1016/j.phytochem.2021.113079] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 12/28/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Fourteen undescribed compounds, including five 2,5-diarylcyclopentenones xylariaones A1-B2, seven α-pyrone derivatives xylaripyones A-G, one γ-pyrone derivative xylaripyone H, one diketopiperazine cyclo-(L-Leu-N-ethyl-L-Glu), and two known diketopiperazines, were isolated from cultures of the endophytic fungus Xylaria sp., which was separated from Cudrania tricuspidata Bureau ex Lavallée. Their structures were determined by analysing extensive spectroscopic data (HRESIMS and NMR) and electronic circular dichroism (ECD) calculations. Furthermore, these compounds were evaluated for potential antiproliferative activity against the human tumour cell lines PC3 and A549, and the results showed that xylaripyone D exhibited moderate inhibitory activity against the proliferation of PC3 cell lines with an IC50 value of 14.75 μM. Meanwhile, xylariaone A3 and xylaripyone F displayed weak inhibitory effects on NO production in RAW 264.7 murine macrophages with IC50 values of 49.76 and 69.68 μM, respectively.
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Affiliation(s)
- Jintong Song
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China
| | - Ke Xu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China; The Second Hospital of Shandong University, No. 247 Bei-Yuan Street, Jinan, 250033, PR China
| | - Chunyu Liu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China
| | - Tian Wang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China
| | - Xiaoyi Luan
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China
| | - Lihua Zhu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China
| | - Zhaojun Chu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China
| | - Xiaojie Fu
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China
| | - Wenqiang Chang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China
| | - Xiaoning Wang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China
| | - Hongxiang Lou
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan, 250012, PR China.
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Masi M, Sautua F, Zatout R, Castaldi S, Arrico L, Isticato R, Pescitelli G, Carmona MA, Evidente A. Phaseocyclopentenones A and B, Phytotoxic Penta- and Tetrasubstituted Cyclopentenones Produced by Macrophomina phaseolina, the Causal Agent of Charcoal Rot of Soybean in Argentina. JOURNAL OF NATURAL PRODUCTS 2021; 84:459-465. [PMID: 33492968 DOI: 10.1021/acs.jnatprod.0c01287] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Two new penta- and tetrasubstituted cyclopentenones, named phaseocyclopentenones A and B (1 and 2), together with guignardone A (3), were isolated from Macrophomina phaseolina cultures. The phytopathogenic fungus was isolated from infected soybean tissues showing charcoal rot symptoms in Argentina. Charcoal rot is a devastating disease considering that soybean is one of the main legumes cultivated in the world. Phaseocyclopentenones A and B were characterized by 1D and 2D 1H and 13C NMR spectroscopic and HRESIMS spectrometric data and chemical methods as 4-benzoyl-3,4,5-trihydroxy-2-phenylcyclopent-2-enone and 3,5-dihydroxy-2,4-diphenylcyclopent-2-enone, respectively. The relative configuration of phaseocyclopentenones A and B was assigned by 1H and NOESY NMR methods, while their absolute configurations were assigned by electronic circular dichroism methods. When assayed on a nonhost plant (Solanum lycopersicum L.) by the leaf puncture assay, phaseocyclopentenones A and B and guignardone A showed phytotoxic activity, while only 1 and 2 were toxic when tested on cuttings of the same plant. No phytotoxicity or antifungal activity was detected for the three compounds on the host plant soybean (Glycine max L.) and against some of its fungal pathogens, namely, Cercospora nicotianae and Colletotrichum truncatum, also isolated from infected soybean plants in Argentina.
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Affiliation(s)
- Marco Masi
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Francisco Sautua
- Facultad de Agronomía, Cátedra de Fitopatología, Universidad de Buenos Aires, C1053 CABA Buenos Aires, Argentina
| | - Roukia Zatout
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Napoli, Italy
- Laboratoire de Mycologie, de Biotechnologie et de l'Activité Microbienne (LaMyBAM), Département de Biologie Appliquée, Université des Frères Mentouri, Constantine1, BP, 325 Route de Aïn El Bey, Constantine 25017, Algeria
| | - Stefany Castaldi
- Dipartimento di Biologia, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Lorenzo Arrico
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, 56124 Pisa, Italy
| | - Rachele Isticato
- Dipartimento di Biologia, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Moruzzi 13, 56124 Pisa, Italy
| | - Marcelo Anibal Carmona
- Facultad de Agronomía, Cátedra de Fitopatología, Universidad de Buenos Aires, C1053 CABA Buenos Aires, Argentina
| | - Antonio Evidente
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, 80126 Napoli, Italy
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Shah F, Gressler M, Nehzati S, Op De Beeck M, Gentile L, Hoffmeister D, Persson P, Tunlid A. Secretion of Iron(III)-Reducing Metabolites during Protein Acquisition by the Ectomycorrhizal Fungus Paxillus involutus. Microorganisms 2020; 9:E35. [PMID: 33374225 PMCID: PMC7824621 DOI: 10.3390/microorganisms9010035] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/21/2020] [Accepted: 12/21/2020] [Indexed: 11/17/2022] Open
Abstract
The ectomycorrhizal fungus Paxillus involutus decomposes proteins using a two-step mechanism, including oxidation and proteolysis. Oxidation involves the action of extracellular hydroxyl radicals (•OH) generated by the Fenton reaction. This reaction requires the presence of iron(II). Here, we monitored the speciation of extracellular iron and the secretion of iron(III)-reducing metabolites during the decomposition of proteins by P. involutus. X-ray absorption spectroscopy showed that extracellular iron was mainly present as solid iron(III) phosphates and oxides. Within 1 to 2 days, these compounds were reductively dissolved, and iron(II) complexes were formed, which remained in the medium throughout the incubation. HPLC and mass spectrometry detected five extracellular iron(III)-reducing metabolites. Four of them were also secreted when the fungus grew on a medium containing ammonium as the sole nitrogen source. NMR identified the unique iron(III)-reductant as the diarylcyclopentenone involutin. Involutin was produced from day 2, just before the elevated •OH production, preceding the oxidation of BSA. The other, not yet fully characterized iron(III)-reductants likely participate in the rapid reduction and dissolution of solid iron(III) complexes observed on day one. The production of these metabolites is induced by other environmental cues than for involutin, suggesting that they play a role beyond the Fenton chemistry associated with protein oxidation.
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Affiliation(s)
- Firoz Shah
- Microbial Ecology Group, Department of Biology, Lund University, 223 62 Lund, Sweden; (F.S.); (S.N.); (M.O.D.B.); (L.G.)
| | - Markus Gressler
- Department of Pharmaceutical Microbiology at the Hans Knöll Institute, Friedrich-Schiller-Universität, 07747 Jena, Germany; (M.G.); (D.H.)
| | - Susan Nehzati
- Microbial Ecology Group, Department of Biology, Lund University, 223 62 Lund, Sweden; (F.S.); (S.N.); (M.O.D.B.); (L.G.)
- MAX IV Laboratory, Lund University, 221 00 Lund, Sweden
| | - Michiel Op De Beeck
- Microbial Ecology Group, Department of Biology, Lund University, 223 62 Lund, Sweden; (F.S.); (S.N.); (M.O.D.B.); (L.G.)
| | - Luigi Gentile
- Microbial Ecology Group, Department of Biology, Lund University, 223 62 Lund, Sweden; (F.S.); (S.N.); (M.O.D.B.); (L.G.)
| | - Dirk Hoffmeister
- Department of Pharmaceutical Microbiology at the Hans Knöll Institute, Friedrich-Schiller-Universität, 07747 Jena, Germany; (M.G.); (D.H.)
| | - Per Persson
- Centre for Environmental and Climate Research (CEC), Lund University, 223 62 Lund, Sweden;
| | - Anders Tunlid
- Microbial Ecology Group, Department of Biology, Lund University, 223 62 Lund, Sweden; (F.S.); (S.N.); (M.O.D.B.); (L.G.)
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Teuscher F, Lin W, Wray V, Edrada R, Padmakumar K, Proksch P, Ebel R. Two New Cyclopentanoids from the Endophytic Fungus Aspergillus sydowii Associated with the Marine Alga Acanthophora Spicifera. Nat Prod Commun 2019. [DOI: 10.1177/1934578x0600101103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A marine-derived endophytic fungus, identified as Aspergillus sydowii was isolated from the inner tissue of the marine red alga Acanthophora spicifera. After mass cultivation of the fungus, chemical investigation afforded two new chlorinated 2,5-diarylcyclopentenones, which were named sydowin A and B. The structures of the new compounds were established on the basis of NMR spectroscopic (1H, 13C, 1H detected direct, and long range 1H-13C correlations) and mass spectrometric (ESI and FT-ICR-MS) data. Structurally related fungal compounds have hitherto only been described from higher basidiomycetes, but are characterized for the first time from an ascomycete in this study.
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Affiliation(s)
- Franka Teuscher
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität, Universitätsstr. 1, Geb. 26.23, 40225 Düsseldorf, Germany
| | - Wenhan Lin
- National Research Laboratories of Natural and Biomimetic Drugs, Peking University, No.38 Xueyang Rd., 100083, Beijing, PR China
| | - Victor Wray
- Gesellschaft für Biotechnologische Forschung, Mascheroder Weg 1, 38124 Braunschweig, Germany
| | - RuAngelie Edrada
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität, Universitätsstr. 1, Geb. 26.23, 40225 Düsseldorf, Germany
| | - K. Padmakumar
- Centre for Marine Biodiversity, Department of Aquatic Biology and Fisheries, Kerala University Campus, Kariavattom, Thiruvananthapuram-695581, India
| | - Peter Proksch
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität, Universitätsstr. 1, Geb. 26.23, 40225 Düsseldorf, Germany
| | - Rainer Ebel
- Institut für Pharmazeutische Biologie und Biotechnologie, Heinrich-Heine-Universität, Universitätsstr. 1, Geb. 26.23, 40225 Düsseldorf, Germany
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Secondary Metabolites from the Root Rot Biocontrol Fungus Phlebiopsis gigantea. Molecules 2018; 23:molecules23061417. [PMID: 29895730 PMCID: PMC6100525 DOI: 10.3390/molecules23061417] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 06/09/2018] [Accepted: 06/11/2018] [Indexed: 12/29/2022] Open
Abstract
Three cyclopentanoids (phlebiopsin A⁻C), one glycosylated p-terphenyl (methyl-terfestatin A), and o-orsellinaldehyde were isolated from the biocontrol fungus Phlebiopsis gigantea, and their structures were elucidated by 1D and 2D NMR spectroscopic analysis, as well as by LC-HRMS. The biological activity of the compounds against the root rot fungus Heterobasidion occidentale, as well as against Fusarium oxysporum and Penicillium canescens, was also investigated, but only o-orsellinaldehyde was found to have any antifungal activity in the concentration range tested.
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Mao X, Song P, Hao Y, Sun Z, Hu X. Stereocontrolled [4+1] Annulation of α-Hydroxycyclobutenones: Synthesis of Polysubstituted Cyclopentenones. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600670] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Xu Mao
- School of Chemistry & Material Science; Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education of China; Northwest University; Xi'an 710127 People's Republic of China
| | - Peidong Song
- School of Chemistry & Material Science; Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education of China; Northwest University; Xi'an 710127 People's Republic of China
| | - Yu Hao
- School of Chemistry & Material Science; Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education of China; Northwest University; Xi'an 710127 People's Republic of China
| | - Zezhong Sun
- School of Chemistry & Material Science; Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education of China; Northwest University; Xi'an 710127 People's Republic of China
| | - Xiangdong Hu
- School of Chemistry & Material Science; Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education of China; Northwest University; Xi'an 710127 People's Republic of China
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Papouskova B, Bernard M, Ottenschlager J, Karban J, Velisek P, Hrbac J, Sykora J, Storch J, Vacek J. A comprehensive LC/MS analysis of novel cyclopentenedione library. J Pharm Biomed Anal 2016; 128:342-351. [PMID: 27328361 DOI: 10.1016/j.jpba.2016.05.048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 05/30/2016] [Accepted: 05/31/2016] [Indexed: 01/28/2023]
Abstract
Cyclopentenediones (CPDs) are compounds with a variety of applications ranging from the preparation of functional polymers to the development of antimicrobial agents, suggesting the potential use of CPDs as novel bioactive compounds or drugs. For this reason, a detailed characterization of CPDs and the development of robust analytical methods for their trace analysis are being sought. Here we focused on the design and synthesis of a library of novelized benzylidene CPD derivatives that were consequently characterized by ultra-high performance liquid chromatography (UHPLC) on-line connected with tandem mass spectrometry (MS/MS). The library design was based on a 2-benzylidene-4-cyclopentene-1,3-dione skeleton substituted with a variety of hydroxy, methoxy, halogen, linear aliphatic, heterocyclic and saccharide moieties, primarily modulating the skeleton's hydrophobicity. The prepared CPDs were effectively ionized by positive/negative atmospheric pressure photoionization (APPI) and atmospheric pressure chemical ionization (APCI). After careful optimization of the dopant composition and flow rate, positive-mode APPI proved to be more sensitive than APCI. In negative mode, both ionization techniques gave similar results. Further, a detailed MS fragmentation study was performed, confirming the structure of the compounds and enabling positional isomers of CPDs to be differentiated on the basis of their collision spectra analysis. Finally, an optimization of the composition of the mobile phase and reversed-phased separation mode were done, followed by a selection of the most suitable UHPLC stationary phases, i.e. C18, C8 and phenyl. The applicability of the method was evaluated by the inclusion of the other two substances in the study, i.e. monomeric and dimeric bioactive CPDs, compound TX-1123 and nostotrebin 6 with cytostatic and antimicrobial activities, respectively. The results presented here could be used in further investigations of the chromatographic retention and MS behavior of CPDs, which could be utilized for their isolation, detailed characterization and analysis in biological systems.
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Affiliation(s)
- Barbora Papouskova
- Department of Analytical Chemistry, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, 17 listopadu 12, Olomouc 771 46, Czech Republic
| | - Martin Bernard
- Institute of Chemical Process Fundamentals of the AS CR, v.v.i., Rozvojova 135/1, Praha 165 02, Czech Republic
| | - Jakub Ottenschlager
- Institute of Chemical Process Fundamentals of the AS CR, v.v.i., Rozvojova 135/1, Praha 165 02, Czech Republic
| | - Jindrich Karban
- Institute of Chemical Process Fundamentals of the AS CR, v.v.i., Rozvojova 135/1, Praha 165 02, Czech Republic
| | - Petr Velisek
- Institute of Chemical Process Fundamentals of the AS CR, v.v.i., Rozvojova 135/1, Praha 165 02, Czech Republic
| | - Jan Hrbac
- Department of Analytical Chemistry, Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University, 17 listopadu 12, Olomouc 771 46, Czech Republic
| | - Jan Sykora
- Institute of Chemical Process Fundamentals of the AS CR, v.v.i., Rozvojova 135/1, Praha 165 02, Czech Republic
| | - Jan Storch
- Institute of Chemical Process Fundamentals of the AS CR, v.v.i., Rozvojova 135/1, Praha 165 02, Czech Republic
| | - Jan Vacek
- Department of Medical Chemistry and Biochemistry, Faculty of Medicine and Dentistry, Palacky University, Hnevotinska 3, Olomouc 775 15, Czech Republic.
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Cheel J, Bogdanová K, Ignatova S, Garrard I, Hewitson P, Kolář M, Kopecký J, Hrouzek P, Vacek J. Dimeric cyanobacterial cyclopent-4-ene-1,3-dione as selective inhibitor of Gram-positive bacteria growth: Bio-production approach and preparative isolation by HPCCC. ALGAL RES 2016. [DOI: 10.1016/j.algal.2016.06.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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10
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Involutin is an Fe3+ reductant secreted by the ectomycorrhizal fungus Paxillus involutus during Fenton-based decomposition of organic matter. Appl Environ Microbiol 2015; 81:8427-33. [PMID: 26431968 PMCID: PMC4644656 DOI: 10.1128/aem.02312-15] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 09/27/2015] [Indexed: 11/20/2022] Open
Abstract
Ectomycorrhizal fungi play a key role in mobilizing nutrients embedded in recalcitrant organic matter complexes, thereby increasing nutrient accessibility to the host plant. Recent studies have shown that during the assimilation of nutrients, the ectomycorrhizal fungus Paxillus involutus decomposes organic matter using an oxidative mechanism involving Fenton chemistry (Fe2+ + H2O2 + H+ → Fe3+ + ˙OH + H2O), similar to that of brown rot wood-decaying fungi. In such fungi, secreted metabolites are one of the components that drive one-electron reductions of Fe3+ and O2, generating Fenton chemistry reagents. Here we investigated whether such a mechanism is also implemented by P. involutus during organic matter decomposition. Activity-guided purification was performed to isolate the Fe3+-reducing principle secreted by P. involutus during growth on a maize compost extract. The Fe3+-reducing activity correlated with the presence of one compound. Mass spectrometry and nuclear magnetic resonance (NMR) identified this compound as the diarylcyclopentenone involutin. A major part of the involutin produced by P. involutus during organic matter decomposition was secreted into the medium, and the metabolite was not detected when the fungus was grown on a mineral nutrient medium. We also demonstrated that in the presence of H2O2, involutin has the capacity to drive an in vitro Fenton reaction via Fe3+ reduction. Our results show that the mechanism for the reduction of Fe3+ and the generation of hydroxyl radicals via Fenton chemistry by ectomycorrhizal fungi during organic matter decomposition is similar to that employed by the evolutionarily related brown rot saprotrophs during wood decay.
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Du L, King JB, Morrow BH, Shen JK, Miller AN, Cichewicz RH. Diarylcyclopentendione metabolite obtained from a Preussia typharum isolate procured using an unconventional cultivation approach. JOURNAL OF NATURAL PRODUCTS 2012; 75:1819-1823. [PMID: 23046341 PMCID: PMC3483373 DOI: 10.1021/np300473h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
An uncommon 2,5-diarylcyclopentenone compound, preussidone (1), and a new biphenyl compound, 1',5-dimethoxy-3,5'-dimethyl-2,3'-oxybiphenyl-1,2'-diol (4), together with two known biphenyl compounds, 5-methoxy-3,5'-dimethyl-2,3'-oxybiphenyl-1,1',2'-triol (2) and cyperin (3), were obtained from a Preussia typharum isolate that was procured using a panel of unconventional media formulations. The structures of the new compounds were established by NMR and mass spectrometry, while the absolute configuration of 1 was assigned by quantum chemical ECD and VCD calculations. The antimicrobial and DPPH radical scavenging activities of 1-4 were tested. Compounds 2 and 4 exhibited DPPH radical scavenging activities that were comparable to the positive control ascorbic acid.
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Affiliation(s)
- Lin Du
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, Stephenson Life Sciences Research Center, 101 Stephenson Parkway, University of Oklahoma, Norman, Oklahoma, 7301965251, USA
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center 101 Stephenson Parkway, Room 1000, University of Oklahoma, Norman, Oklahoma, 7301965251, USA
| | - Jarrod B. King
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, Stephenson Life Sciences Research Center, 101 Stephenson Parkway, University of Oklahoma, Norman, Oklahoma, 7301965251, USA
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center 101 Stephenson Parkway, Room 1000, University of Oklahoma, Norman, Oklahoma, 7301965251, USA
| | - Brian H. Morrow
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center 101 Stephenson Parkway, Room 1000, University of Oklahoma, Norman, Oklahoma, 7301965251, USA
| | - Jana K. Shen
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center 101 Stephenson Parkway, Room 1000, University of Oklahoma, Norman, Oklahoma, 7301965251, USA
| | - Andrew N. Miller
- University of Illinois, Illinois Natural History Survey, 1816 South Oak Street, Champaign, IL 6182066970, USA
| | - Robert H. Cichewicz
- Natural Products Discovery Group, Institute for Natural Products Applications and Research Technologies, Stephenson Life Sciences Research Center, 101 Stephenson Parkway, University of Oklahoma, Norman, Oklahoma, 7301965251, USA
- Department of Chemistry and Biochemistry, Stephenson Life Sciences Research Center 101 Stephenson Parkway, Room 1000, University of Oklahoma, Norman, Oklahoma, 7301965251, USA
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Rineau F, Roth D, Shah F, Smits M, Johansson T, Canbäck B, Olsen PB, Persson P, Grell MN, Lindquist E, Grigoriev IV, Lange L, Tunlid A. The ectomycorrhizal fungus Paxillus involutus converts organic matter in plant litter using a trimmed brown-rot mechanism involving Fenton chemistry. Environ Microbiol 2012; 14:1477-87. [PMID: 22469289 PMCID: PMC3440587 DOI: 10.1111/j.1462-2920.2012.02736.x] [Citation(s) in RCA: 157] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 02/16/2012] [Accepted: 03/07/2012] [Indexed: 01/25/2023]
Abstract
Soils in boreal forests contain large stocks of carbon. Plants are the main source of this carbon through tissue residues and root exudates. A major part of the exudates are allocated to symbiotic ectomycorrhizal fungi. In return, the plant receives nutrients, in particular nitrogen from the mycorrhizal fungi. To capture the nitrogen, the fungi must at least partly disrupt the recalcitrant organic matter-protein complexes within which the nitrogen is embedded. This disruption process is poorly characterized. We used spectroscopic analyses and transcriptome profiling to examine the mechanism by which the ectomycorrhizal fungus Paxillus involutus degrades organic matter when acquiring nitrogen from plant litter. The fungus partially degraded polysaccharides and modified the structure of polyphenols. The observed chemical changes were consistent with a hydroxyl radical attack, involving Fenton chemistry similar to that of brown-rot fungi. The set of enzymes expressed by Pa. involutus during the degradation of the organic matter was similar to the set of enzymes involved in the oxidative degradation of wood by brown-rot fungi. However, Pa. involutus lacked transcripts encoding extracellular enzymes needed for metabolizing the released carbon. The saprotrophic activity has been reduced to a radical-based biodegradation system that can efficiently disrupt the organic matter-protein complexes and thereby mobilize the entrapped nutrients. We suggest that the released carbon then becomes available for further degradation and assimilation by commensal microbes, and that these activities have been lost in ectomycorrhizal fungi as an adaptation to symbiotic growth on host photosynthate. The interdependence of ectomycorrhizal symbionts and saprophytic microbes would provide a key link in the turnover of nutrients and carbon in forest ecosystems.
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Affiliation(s)
- Francois Rineau
- Department of Biology, Microbial Ecology Group, Ecology BuildingSE-22362 Lund, Sweden
| | - Doris Roth
- Department of Biotechnology and Chemistry, Aalborg UniversityLautrupvang 15, DK-2750, Ballerup, Denmark
| | - Firoz Shah
- Department of Biology, Microbial Ecology Group, Ecology BuildingSE-22362 Lund, Sweden
| | - Mark Smits
- Centre for Environmental Sciences, Hasselt UniversityBuilding D, Agoralaan, 3590 Diepenbeek, Limburg, Belgium
| | - Tomas Johansson
- Department of Biology, Microbial Ecology Group, Ecology BuildingSE-22362 Lund, Sweden
| | - Björn Canbäck
- Department of Biology, Microbial Ecology Group, Ecology BuildingSE-22362 Lund, Sweden
| | | | - Per Persson
- Department of Chemistry, Umeå UniversitySE-901 87 Umeå, Sweden
| | - Morten Nedergaard Grell
- Department of Biotechnology and Chemistry, Aalborg UniversityLautrupvang 15, DK-2750, Ballerup, Denmark
| | - Erika Lindquist
- US Department of Energy, Joint Genome Institute2800 Mitchell Avenue, Walnut Creek, CA94598, USA
| | - Igor V Grigoriev
- US Department of Energy, Joint Genome Institute2800 Mitchell Avenue, Walnut Creek, CA94598, USA
| | - Lene Lange
- Department of Biotechnology and Chemistry, Aalborg UniversityLautrupvang 15, DK-2750, Ballerup, Denmark
| | - Anders Tunlid
- Department of Biology, Microbial Ecology Group, Ecology BuildingSE-22362 Lund, Sweden
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Yang XW, Ding Y, Li XC, Ferreira D, Shen YH, Li SM, Wang N, Zhang WD. Cycloabiesesquine A, a unique sesquiterpenoid from Abies delavayi. Chem Commun (Camb) 2009:3771-3. [DOI: 10.1039/b905710b] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bringmann G, Gulder TA, Reichert M, Gulder T. The online assignment of the absolute configuration of natural products: HPLC-CD in combination with quantum chemical CD calculations. Chirality 2008; 20:628-42. [DOI: 10.1002/chir.20557] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bringmann G, Feineis D, God R, Maksimenka K, Mühlbacher J, Messer K, Münchbach M, Gulden KP, Peters EM, Peters K. Resolution and chiroptical properties of the neurotoxin 1-trichloromethyl-1,2,3,4-tetrahydro-β-carboline (TaClo) and related compounds: quantum chemical CD calculations and X-ray diffraction analysis. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.06.093] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Antkowiak R, Antkowiak WZ, Banczyk I, Mikolajczyk L. A new phenolic metabolite, involutone, isolated from the mushroom Paxillus involutus. CAN J CHEM 2003. [DOI: 10.1139/v02-194] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A new optically active metabolite, involutone, was found in methanol, ethanol, or n-butanol extracts of freshly collected Paxillus involutus. The structure of this compound was proved to be 5-(3,4-dihydroxyphenyl)-2-(4-hydroxyphenyl)-2-hydroxy-4-cyclopenten-1,3-dione on the basis of the spectral and chemical properties of involutone and its tetraacetyl derivative. In addition, a number of compounds of known structures such as linoleic and crotonic acids, mannitol, ergosterol, involutin, as well as methyl, ethyl, or n-butyl-β-D-glucopyranosides, and methyl, ethyl, or n-butyl linoleates, depending in both cases on the alcohol used in the extraction, were also isolated in a pure state from the mushroom.Key words: Paxillus involutus, Brown Roll-rim, metabolite isolation, structure study, quaternary hydroxycyclopentanedione, NMR of mushroom pigments, glucosides and linoleates, enzymic glucosylation and esterification.
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Bringmann G, Lang G. Full absolute stereostructures of natural products directly from crude extracts: The HPLC-MS/ MS-NMR-CD 'triad'. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2003; 37:89-116. [PMID: 15825641 DOI: 10.1007/978-3-642-55519-0_4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
This chapter deals with an efficient methodology available in our Center of Excellence, BIOTECmarin: the novel analytical 'triad' HPLC-MS/MS-NMR-CD. By this method, which was, in this complemented form, first introduced into phytochemical research by our group, we can not only rapidly identify known structures, but can also investigate new metabolites and establish their full absolute stereostructures online, directly from crude extracts, without the necessity of first isolating the compounds. The LC-CD option, which we have been using for the first time in natural products analysis, becomes even more valuable by the possibility of interpreting the online CD spectra by their simulation or prediction through quantum chemical calculation, thus avoiding the usual, often risky, empirical comparison with the CD spectra of (sometimes not so related) compounds of known absolute stereostructure or the application of (sometimes not really applicable) likewise empirical CD rules. The hyphenated analytical methods are additionally complemented by our synthetic expertise, again involving new concepts and strategies developed in our group. The methods and their application will first be explained and exemplified for plant-derived ('terrestrial') natural products, for which they were initially developed, and will then be applied to the online structural elucidation of novel natural products from marine organisms.
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Affiliation(s)
- G Bringmann
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
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