51
|
Burkhardt I, Kreuzenbeck NB, Beemelmanns C, Dickschat JS. Mechanistic characterization of three sesquiterpene synthases from the termite-associated fungus Termitomyces. Org Biomol Chem 2019; 17:3348-3355. [DOI: 10.1039/c8ob02744g] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three terpene synthases from the termite associated fungus Termitomyces were studied by isotopic labelling experiments and site-directed mutagenesis.
Collapse
Affiliation(s)
- Immo Burkhardt
- Kekulé-Institute of Organic Chemistry and Biochemistry
- University of Bonn
- 53121 Bonn
- Germany
| | - Nina B. Kreuzenbeck
- Leibnitz Institute for Natural Product Research and Infection Biology
- Hans-Knöll-Institute
- 07745 Jena
- Germany
| | - Christine Beemelmanns
- Leibnitz Institute for Natural Product Research and Infection Biology
- Hans-Knöll-Institute
- 07745 Jena
- Germany
| | - Jeroen S. Dickschat
- Kekulé-Institute of Organic Chemistry and Biochemistry
- University of Bonn
- 53121 Bonn
- Germany
| |
Collapse
|
52
|
Rinkel J, Babczyk A, Wang T, Stadler M, Dickschat JS. Volatiles from the hypoxylaceous fungi Hypoxylon griseobrunneum and Hypoxylon macrocarpum. Beilstein J Org Chem 2018; 14:2974-2990. [PMID: 30591821 PMCID: PMC6296411 DOI: 10.3762/bjoc.14.277] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 11/22/2018] [Indexed: 01/04/2023] Open
Abstract
The volatiles emitted by the ascomycetes Hypoxylon griseobrunneum and Hypoxylon macrocarpum (Hypoxylaceae, Xylariales) were collected by use of a closed-loop stripping apparatus (CLSA) and analysed by GC–MS. The main compound class of both species were polysubstituted benzene derivatives. Their structures could only be unambiguously determined by comparison to all isomers with different substitution patterns. The substitution pattern of the main compound from H. griseobrunneum, the new natural product 2,4,5-trimethylanisole, was explainable by a polyketide biosynthesis mechanism that was supported by a feeding experiment with (methyl-2H3)methionine.
Collapse
Affiliation(s)
- Jan Rinkel
- Kekulé-Institut für Organische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Alexander Babczyk
- Kekulé-Institut für Organische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Tao Wang
- Kekulé-Institut für Organische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Marc Stadler
- Abteilung Mikrobielle Wirkstoffe, Helmholtz-Zentrum für Infektionsforschung, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Jeroen S Dickschat
- Kekulé-Institut für Organische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| |
Collapse
|
53
|
Burkhardt I, Dickschat JS. Synthesis and Absolute Configuration of Natural 2-Pyrones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800621] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Immo Burkhardt
- Kekulé-Institute of Organic Chemistry and Biochemistry; University of Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| | - Jeroen S. Dickschat
- Kekulé-Institute of Organic Chemistry and Biochemistry; University of Bonn; Gerhard-Domagk-Straße 1 53121 Bonn Germany
| |
Collapse
|
54
|
Shared weapons in fungus-fungus and fungus-plant interactions? Volatile organic compounds of plant or fungal origin exert direct antifungal activity in vitro. FUNGAL ECOL 2018. [DOI: 10.1016/j.funeco.2018.02.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
55
|
Yan DH, Song X, Li H, Luo T, Dou G, Strobel G. Antifungal Activities of Volatile Secondary Metabolites of Four Diaporthe Strains Isolated from Catharanthus roseus. J Fungi (Basel) 2018; 4:E65. [PMID: 29848985 PMCID: PMC6023506 DOI: 10.3390/jof4020065] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 05/25/2018] [Accepted: 05/29/2018] [Indexed: 12/16/2022] Open
Abstract
Four endophytic fungi were isolated from the medicinal plant, Catharanthus roseus, and were identified as Diaporthe spp. with partial translation elongation factor 1-alpha (TEF1), beta-tubulin (TUB), histone H3 (HIS), calmodulin (CAL) genes, and rDNA internal transcribed spacer (ITS) region (TEF1-TUB-HIS--CAL-ITS) multigene phylogeny suggested for species delimitation in the Diaporthe genus. Each fungus produces a unique mixture of volatile organic compounds (VOCs) with an abundant mixture of terpenoids analyzed by headspace solid-phase microextraction (SPME) fiber-GC/MS. These tentatively-detected terpenes included α-muurolene, β-phellandrene, γ-terpinene, and α-thujene, as well as other minor terpenoids, including caryophyllene, patchoulene, cedrene, 2-carene, and thujone. The volatile metabolites of each isolate showed antifungal properties against a wide range of plant pathogenic test fungi and oomycetes, including Alternaria alternata, Botrytis cinerea, Colletotrichum gloeosporioides, Fusarium graminearum, and Phytophthora cinnamomi. The growth inhibition of the pathogens varied between 10% and 60% within 72 h of exposure. To our knowledge, the endophytic Diaporthe-like strains are first reported from Catharanthus roseus. VOCs produced by each strain of the endophytic Diaporthe fungi were unique components with dominant monoterpenes comparing to known Diaporthe fungal VOCs. A discussion is presented on the inhibitive bioactivities of secondary metabolites among endophytic Diaporthe fungi and this medicinal plant.
Collapse
Affiliation(s)
- Dong-Hui Yan
- Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Hai Dian District, Beijing 100091, China.
| | - Xiaoyu Song
- Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Hai Dian District, Beijing 100091, China.
| | - Hongchang Li
- Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Hai Dian District, Beijing 100091, China.
| | - Tushou Luo
- Research Institute of Tropical Forestry, Chinese Academy of Forestry, Tianhe District, Guangzhou 510520, China.
| | - Guiming Dou
- Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Hai Dian District, Beijing 100091, China.
| | - Gary Strobel
- Department of Plant Sciences, Montana State University, Bozeman, MT 59717, USA.
| |
Collapse
|
56
|
Barra L, Barac P, König GM, Crüsemann M, Dickschat JS. Volatiles from the fungal microbiome of the marine sponge Callyspongia cf. flammea. Org Biomol Chem 2018; 15:7411-7421. [PMID: 28872169 DOI: 10.1039/c7ob01837a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The volatiles emitted by five fungal strains previously isolated from the marine sponge Callyspongia cf. flammea were captured with a closed-loop stripping apparatus (CLSA) and analyzed by GC-MS. Besides several widespread compounds, a series of metabolites with interesting bioactivities were found, including the quorum sensing inhibitor protoanemonin, the fungal phytotoxin 3,4-dimethylpentan-4-olide, and the insect attractant 1,2,4-trimethoxybenzene. In addition, the aromatic polyketides isotorquatone and chartabomone that are both known from Eucalyptus and a new O-desmethyl derivative were identified. The biosynthesis of isotorquatone was studied by feeding experiments with isotopically labeled precursors and its absolute configuration was determined by enantioselective synthesis of a reference compound. Bioactivity testings showed algicidal activity for some of the identified compounds, suggesting a potential ecological function in sponge defence.
Collapse
Affiliation(s)
- Lena Barra
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, D-53121 Bonn, Germany.
| | | | | | | | | |
Collapse
|
57
|
Dickschat JS, Celik E, Brock NL. Volatiles from three genome sequenced fungi from the genus Aspergillus. Beilstein J Org Chem 2018; 14:900-910. [PMID: 29765471 PMCID: PMC5942377 DOI: 10.3762/bjoc.14.77] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 04/16/2018] [Indexed: 01/18/2023] Open
Abstract
The volatiles emitted by agar plate cultures of three genome sequenced fungal strains from the genus Aspergillus were analysed by GC-MS. All three strains produced terpenes for which a biosynthetic relationship is discussed. The obtained data were also correlated to genetic information about the encoded terpene synthases for each strain. Besides terpenes, a series of aromatic compounds and volatiles derived from fatty acid and branched amino acid metabolism were identified. Some of these compounds have not been described as fungal metabolites before. For the compound ethyl (E)-hept-4-enoate known from cantaloupe a structural revision to the Z stereoisomer is proposed. Ethyl (Z)-hept-4-enoate also occurs in Aspergillus clavatus and was identified by synthesis of an authentic standard.
Collapse
Affiliation(s)
- Jeroen S Dickschat
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Ersin Celik
- Kekulé-Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Nelson L Brock
- Institute of Organic Chemistry, TU Braunschweig, Hagenring 30, 38106 Braunschweig, Germany (former address)
| |
Collapse
|
58
|
Caballero Ortiz S, Trienens M, Pfohl K, Karlovsky P, Holighaus G, Rohlfs M. Phenotypic responses to microbial volatiles render a mold fungus more susceptible to insect damage. Ecol Evol 2018; 8:4328-4339. [PMID: 29721301 PMCID: PMC5916272 DOI: 10.1002/ece3.3978] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/05/2018] [Accepted: 02/09/2018] [Indexed: 01/07/2023] Open
Abstract
In decomposer systems, fungi show diverse phenotypic responses to volatile organic compounds of microbial origin (volatiles). The mechanisms underlying such responses and their consequences for the performance and ecological success of fungi in a multitrophic community context have rarely been tested explicitly. We used a laboratory‐based approach in which we investigated a tripartite yeast–mold–insect model decomposer system to understand the possible influence of yeast‐borne volatiles on the ability of a chemically defended mold fungus to resist insect damage. The volatile‐exposed mold phenotype (1) did not exhibit protein kinase A‐dependent morphological differentiation, (2) was more susceptible to insect foraging activity, and (3) had reduced insecticidal properties. Additionally, the volatile‐exposed phenotype was strongly impaired in secondary metabolite formation and unable to activate “chemical defense” genes upon insect damage. These results suggest that volatiles can be ecologically important factors that affect the chemical‐based combative abilities of fungi against insect antagonists and, consequently, the structure and dynamics of decomposer communities.
Collapse
Affiliation(s)
- Silvia Caballero Ortiz
- J.F. Blumenbach Institute of Zoology and Anthropology Animal Ecology Group University of Goettingen Goettingen Germany
| | - Monika Trienens
- J.F. Blumenbach Institute of Zoology and Anthropology Animal Ecology Group University of Goettingen Goettingen Germany.,Present address: Institute for Evolution and Biodiversity University of Muenster Muenster Germany
| | - Katharina Pfohl
- Molecular Phytopathology and Mycotoxin Research University of Goettingen Goettingen Germany
| | - Petr Karlovsky
- Molecular Phytopathology and Mycotoxin Research University of Goettingen Goettingen Germany
| | - Gerrit Holighaus
- J.F. Blumenbach Institute of Zoology and Anthropology Animal Ecology Group University of Goettingen Goettingen Germany.,Forest Zoology and Forest Conservation University of Goettingen Goettingen Germany
| | - Marko Rohlfs
- J.F. Blumenbach Institute of Zoology and Anthropology Animal Ecology Group University of Goettingen Goettingen Germany.,Institute of Ecology, Population and Evolutionary Ecology Group University of Bremen Bremen Germany
| |
Collapse
|
59
|
Dickschat JS, Wang T, Stadler M. Volatiles from the xylarialean fungus Hypoxylon invadens. Beilstein J Org Chem 2018; 14:734-746. [PMID: 29719571 PMCID: PMC5905279 DOI: 10.3762/bjoc.14.62] [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: 11/24/2017] [Accepted: 03/20/2018] [Indexed: 11/23/2022] Open
Abstract
The volatiles emitted by agar plate cultures of the xylarialean fungus Hypoxylon invadens were investigated by use of a closed loop stripping apparatus in combination with GC-MS. Several aromatic compounds were found that could only be identified by comparison to all possible constitutional isomers with different ring substitution patterns. For the set of identified compounds a plausible biosynthetic scheme was suggested that gives further support for the assigned structures.
Collapse
Affiliation(s)
- Jeroen S Dickschat
- Kekulé-Institut für Organische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Tao Wang
- Kekulé-Institut für Organische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Marc Stadler
- Abteilung Mikrobielle Wirkstoffe, Helmholtz-Zentrum für Infektionsforschung, Inhoffenstraße 7, 38124 Braunschweig, Germany
| |
Collapse
|
60
|
Wang T, Mohr KI, Stadler M, Dickschat JS. Volatiles from the tropical ascomycete Daldinia clavata (Hypoxylaceae, Xylariales). Beilstein J Org Chem 2018; 14:135-147. [PMID: 29441137 PMCID: PMC5789425 DOI: 10.3762/bjoc.14.9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/04/2018] [Indexed: 11/23/2022] Open
Abstract
The volatiles from the fungus Daldinia clavata were collected by use of a closed-loop stripping apparatus and analysed by GC–MS. A few compounds were readily identified by comparison of measured to library mass spectra and of retention indices to published data, while for other compounds a synthesis of references was required. For one of the main compounds, 5-hydroxy-4,6-dimethyloctan-3-one, the relative and absolute configuration was determined by synthesis of all eight stereoisomers and gas chromatographic analysis using a homochiral stationary phase. Another identified new natural product is 6-nonyl-2H-pyran-2-one. The antimicrobial and cytotoxic effects of the synthetic volatiles are also reported.
Collapse
Affiliation(s)
- Tao Wang
- Kekulé-Institut für Organische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Kathrin I Mohr
- Abteilung für Mikrobielle Wirkstoffe, Helmholtz-Zentrum für Infektionsforschung, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Marc Stadler
- Abteilung für Mikrobielle Wirkstoffe, Helmholtz-Zentrum für Infektionsforschung, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Jeroen S Dickschat
- Kekulé-Institut für Organische Chemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| |
Collapse
|
61
|
Ahmed WM, Geranios P, White IR, Lawal O, Nijsen TM, Bromley MJ, Goodacre R, Read ND, Fowler SJ. Development of an adaptable headspace sampling method for metabolic profiling of the fungal volatome. Analyst 2018; 143:4155-4162. [DOI: 10.1039/c8an00841h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Culture headspace sampling and analysis of aspergillus fumigatus volatile metabolites by TD-GC-MS.
Collapse
Affiliation(s)
| | | | - Iain R. White
- School of Chemistry
- Manchester Institute of Biotechnology
- University of Manchester
- UK
| | | | | | | | - Royston Goodacre
- School of Chemistry
- Manchester Institute of Biotechnology
- University of Manchester
- UK
| | - Nick D. Read
- School of Biological Sciences
- University of Manchester
- UK
| | - Stephen J. Fowler
- School of Biological Sciences
- University of Manchester
- UK
- Manchester Academic Health Science Centre
- Manchester University Hospitals NHS Foundation Trust
| |
Collapse
|
62
|
Chen X, Huynh N, Cui H, Zhou P, Zhang X, Yang B. Correlating supercritical fluid extraction parameters with volatile compounds from Finnish wild mushrooms (Craterellus tubaeformis) and yield prediction by partial least squares regression analysis. RSC Adv 2018; 8:5233-5242. [PMID: 35542441 PMCID: PMC9078171 DOI: 10.1039/c7ra12472d] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 01/24/2018] [Indexed: 11/24/2022] Open
Abstract
Supercritical fluid was applied to extract volatile compounds from Finnish wild mushrooms (Craterellus tubaeformis). The effects of extraction pressure, temperature and supercritical carbon dioxide volume on extraction yield and the content of mushroom alcohols in the extracts were investigated in the range from 80 to 95 bar, 35 to 55 °C and 30 to 70 mL, respectively. The correlation between extracted volatile compounds and supercritical fluid extraction parameters was studied and prediction models of ten extracted aroma compounds were established by partial least squares regression (PLSR). The calibrated and validated models of 2-octen-1-ol (R_cal = 0.96, R_cal2 = 0.91, R_val = 0.94, R_val2 = 0.88) and geranyl acetone (R_cal = 0.96, R_cal2 = 0.92, R_val = 0.95, R_val2 = 0.90) were satisfactory, and had the predictive capability of 88% and 92%, respectively. Moreover, the predictive equations for other extracted aroma compounds were also proved to be sufficiently accurate. Hence, the present study provides useful reference for extraction of volatile compounds from mushrooms using supercritical fluid for further industrial applications. Prediction models of ten extracted volatile compounds were established and accurately validated by PLSR.![]()
Collapse
Affiliation(s)
- Xiao Chen
- State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Nghia Huynh
- Food Chemistry and Food Development
- Department of Biochemistry
- University of Turku
- FIN-20014 Turku
- Finland
| | - Heping Cui
- State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Peng Zhou
- State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Xiaoming Zhang
- State Key Laboratory of Food Science and Technology
- School of Food Science and Technology
- Jiangnan University
- Wuxi
- China
| | - Baoru Yang
- Food Chemistry and Food Development
- Department of Biochemistry
- University of Turku
- FIN-20014 Turku
- Finland
| |
Collapse
|
63
|
Rühl V, Lotz-Winter H, Neuss A, Piepenbring M, Zorn H, Rühl M. Comprehensive analysis of the volatilome of Scytinostroma portentosum. Mycol Prog 2017. [DOI: 10.1007/s11557-017-1367-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
64
|
Barra L, Dickschat JS. Harzianone Biosynthesis by the Biocontrol Fungus Trichoderma. Chembiochem 2017; 18:2358-2365. [PMID: 28944564 DOI: 10.1002/cbic.201700462] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Indexed: 12/22/2022]
Abstract
Analysis of the volatile terpenes produced by seven fungal strains of the genus Trichoderma by use of a closed-loop stripping apparatus (CLSA) revealed a common production of harzianone, a bioactive, structurally unique diterpenoid consisting of a fused tetracyclic 4,7,5,6-membered ring system. The terpene cyclization mechanism was studied by feeding experiments using selectively 13 C- and 2 H-labeled synthetic mevalonolactone isotopologues, followed by analysis of the incorporation patterns by 13 C NMR spectroscopy and GC/MS. The structure of harzianone was further supported from a 13 C,13 C COSY experiment of the in-vivo-generated fully 13 C-labeled diterpene.
Collapse
Affiliation(s)
- Lena Barra
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Jeroen S Dickschat
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| |
Collapse
|
65
|
Dickschat JS, Rinkel J, Klapschinski T, Petersen J. Characterisation of the l-Cystine β-Lyase PatB from Phaeobacter inhibens: An Enzyme Involved in the Biosynthesis of the Marine Antibiotic Tropodithietic Acid. Chembiochem 2017; 18:2260-2267. [PMID: 28895253 DOI: 10.1002/cbic.201700358] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Indexed: 01/22/2023]
Abstract
The l-cystine β-lyase from Phaeobacter inhibens is involved in the biosynthesis of the sulfur-containing antibiotic tropodithietic acid. The recombinant enzyme was obtained by heterologous expression in Escherichia coli and biochemically characterised by unambiguous chemical identification of the products formed from the substrate l-cystine, investigation of the substrate spectrum, determination of the enzyme kinetics, sequence alignment with closely related homologues and site-directed mutagenesis to identify a highly conserved lysine residue that is critical for functionality. PatB from P. inhibens is a new member of the small group of characterised l-cystine β-lyases and the first example of an enzyme with such an activity that is required for the biosynthesis of an antibiotic. A comparison of PatB to previously reported enzymes with l-cystine β-lyase activity from bacteria and plants is given.
Collapse
Affiliation(s)
- Jeroen S Dickschat
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Jan Rinkel
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Tim Klapschinski
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Jörn Petersen
- Leibniz-Institut DSMZ, Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstrasse 7b, 38124, Braunschweig, Germany
| |
Collapse
|
66
|
Abstract
Mushrooms are known to produce over 140 natural products bearing an indole heterocycle. In this review, the isolation of these mushroom-derived indole alkaloids is discussed, along with their associated biological activities.
Collapse
Affiliation(s)
- Joshua A Homer
- School of Chemical Sciences, University of Auckland , 23 Symonds Street, Auckland 1142, New Zealand
| | - Jonathan Sperry
- School of Chemical Sciences, University of Auckland , 23 Symonds Street, Auckland 1142, New Zealand
| |
Collapse
|
67
|
Tabei Y, Murotomi K, Umeno A, Horie M, Tsujino Y, Masutani B, Yoshida Y, Nakajima Y. Antioxidant properties of 5-hydroxy-4-phenyl-butenolide via activation of Nrf2/ARE signaling pathway. Food Chem Toxicol 2017; 107:129-137. [PMID: 28655653 DOI: 10.1016/j.fct.2017.06.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 06/21/2017] [Accepted: 06/22/2017] [Indexed: 12/30/2022]
Abstract
5-Hydroxy-4-phenyl-butenolide (5H4PB) is a bioactive compound with antifungal and anti-obesity properties. Although it has recently been shown that 5H4PB activates peroxisome proliferator-activated receptor-gamma (PPARγ), the effect of 5H4PB on intracellular signaling pathways has not been clarified. In this study, we found that 5H4PB activated the nuclear factor erythroid 2-related factor 2 (Nrf2)/antioxidant response element (ARE) signaling pathway, which plays an important role in cellular defense against oxidative stress, and the subsequent upregulation of ARE-dependent cytoprotective genes, including the heme oxygenase-1, catalase, and superoxide dismutase genes, without exhibiting cytotoxicity. In addition, 5H4PB significantly attenuated intracellular ROS generation, glutathione oxidation, and DNA damage induced by hydrogen peroxide (H2O2) exposure in mouse fibroblast cells. Furthermore, we demonstrated that pretreatment with 5H4PB confers a significant cytoprotective effect against H2O2-induced cell death in mouse cultured fibroblasts and primary hepatocytes. Thus, our study demonstrated that 5H4PB enhanced cellular resistance to oxidative damage via activation of the Nrf2/ARE signaling pathway.
Collapse
Affiliation(s)
- Yosuke Tabei
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Kazutoshi Murotomi
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Aya Umeno
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Masanori Horie
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Yoshio Tsujino
- School of Materials Science, Japan Advanced Institute of Science and Technology, 1-1 Asahidai, Nomi, Ishikawa 923-1292, Japan
| | - Bumbu Masutani
- Kojun Japan Co., Ltd., 1-5-20 Tenma, Kita-ku, Osaka 530-0043, Japan
| | - Yasukazu Yoshida
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan
| | - Yoshihiro Nakajima
- Health Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 2217-14 Hayashi-cho, Takamatsu, Kagawa 761-0395, Japan.
| |
Collapse
|
68
|
Making Use of Genomic Information to Explore the Biotechnological Potential of Medicinal Mushrooms. MEDICINAL AND AROMATIC PLANTS OF THE WORLD 2017. [DOI: 10.1007/978-981-10-5978-0_13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|