1
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Jayaram A, Seenivasan VT, Govindan K, Liu YM, Chen NQ, Yeh TW, Venkatachalam G, Li CH, Leung TF, Lin WY. Base-promoted triple cleavage of CCl 2Br: a direct one-pot synthesis of unsymmetrical oxalamide derivatives. Chem Commun (Camb) 2024; 60:3079-3082. [PMID: 38406884 DOI: 10.1039/d4cc00354c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
We present a novel, eco-friendly and one-pot approach for synthesizing unsymmetrical oxalamides with the aid of dichloroacetamide and amine/amides in the presence of CBr4 in a basic medium. The use of water as a potent supplement for the oxygen atom source and the detailed mechanism have been disclosed. Moreover, the protocol involves triple cleavage of CCl2Br and the formation of new C-O/C-N bonds, with the advantage of achieving selective bromination using CBr4 with good to excellent yield under mild conditions. The method also demonstrates promise for industrial use, as proven by its effective implementation in gram-scale synthesis conducted in a batch process, along with its utilization in a continuous-flow system.
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Affiliation(s)
- Alageswaran Jayaram
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China.
| | | | - Karthick Govindan
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China.
| | - Yu-Ming Liu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China.
| | - Nian-Qi Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China.
| | - Ting-Wei Yeh
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China.
| | - Gokulakannan Venkatachalam
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China.
| | - Chien-Hung Li
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China.
| | - Tsz-Fai Leung
- Department of Chemistry, National Sun Yat-sen University, Taiwan, Republic of China
| | - Wei-Yu Lin
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan, Republic of China.
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung 80708, Taiwan, Republic of China
- Drug Development and Value Creation Research Centre, Kaohsiung Medical University, Taiwan, Republic of China
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2
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Xia Y, Zhu G, Zhang X, Li S, Du L, Zhu W. Biosynthesis of 4-Acyl-5-aminoimidazole Alkaloids Featuring a New Friedel-Crafts Acyltransferase. J Am Chem Soc 2023; 145:26308-26317. [PMID: 37983668 DOI: 10.1021/jacs.3c09522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Friedel-Crafts acylation (FCA) is a highly beneficial approach in organic chemistry for creating the important C-C bonds that are necessary for building intricate frameworks between aromatic substrates and an acyl group. However, there are few reports about enzyme catalyzed FCA reactions. In this study, 4-acyl-5-aminoimidazole alkaloids (AAIAs), streptimidazoles A-C (1-3), and the enantiopure (+)-nocarimidazole C (4) as well as their ribosides, streptimidazolesides A-D (5-8), were identified from the fermentation broth of Streptomyces sp. OUCMDZ-944 or heterologous S. coelicolor M1154 mutant. The biosynthetic gene cluster (smz) was identified, and the biosynthetic pathway of AAIAs was elucidated for the first time. In vivo and in vitro studies proved the catalytic activity of the four essential genes smzB, -C, -E, and -F for AAIAs biosynthesis and clarified the biosynthetic process of the alkaloids. The ligase SmzE activates fatty acyl groups and connects them to the acyl carrier protein (ACP) holo-SmzF. Then, the acyl group is transferred onto the key residue Cys49 of SmzB, a new Friedel-Crafts acyltransferase (FCase). Subsequently, the FCA reaction between the acyl groups and 5-aminoimidazole ribonucleotide (AIR) occurs to generate the key intermediate AAIA-nucleotides catalyzed by SmzB. Finally, the hydrolase SmzC catalyzes the N-glycosidic bond cleavage of the intermediates to form AAIAs. Structural simulation, molecular modeling, and mutational analysis of SmzB showed that Tyr26, Cys49, and Tyr93 are the key catalytic residues in the C-C bond formation of the acyl chain of AAIAs, providing mechanistic insights into the enzymatic FCA reaction.
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Affiliation(s)
- Yuwei Xia
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Guoliang Zhu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Xingwang Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Shengying Li
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Lei Du
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao 266237, China
| | - Weiming Zhu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
- Laboratory for Marine Drugs and Bioproducts, Laoshan Laboratory, Qingdao 266237, China
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3
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Koteska D, Marter P, Huang S, Pradella S, Petersen J, Schulz S. Volatiles of the Apicomplexan Alga Chromera velia and Associated Bacteria. Chembiochem 2023; 24:e202200530. [PMID: 36416092 PMCID: PMC10107727 DOI: 10.1002/cbic.202200530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 11/24/2022]
Abstract
Volatiles released by the apicomplexan alga Chromera velia CCAP1602/1 and their associated bacteria have been investigated. A metagenome analysis allowed the identification of the most abundant heterotrophic bacteria of the phycosphere, but the isolation of additional strains showed that metagenomics underestimated the complexity of the algal microbiome, However, a culture-independent approach revealed the presence of a planctomycete that likely represents a novel bacterial family. We analysed algal and bacterial volatiles by open-system-stripping analysis (OSSA) on Tenax TA desorption tubes, followed by thermodesorption, cryofocusing and GC-MS-analysis. The analyses of the alga and the abundant bacterial strains Sphingopyxis litoris A01A-101, Algihabitans albus A01A-324, "Coraliitalea coralii" A01A-333 and Litoreibacter sp. A01A-347 revealed sulfur- and nitrogen-containing compounds, ketones, alcohols, aldehydes, aromatic compounds, amides and one lactone, as well as the typical algal products, apocarotenoids. The compounds were identified by gas chromatographic retention indices, comparison of mass spectra and syntheses of reference compounds. A major algal metabolite was 3,4,4-trimethylcyclopent-2-en-1-one, an apocarotenoid indicating the presence of carotenoids related to capsanthin, not reported from algae so far. A low overlap in volatiles bouquets between C. velia and the bacteria was found, and the xenic algal culture almost exclusively released algal components.
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Affiliation(s)
- Diana Koteska
- Institut für Organische ChemieTechnische Universität BraunschweigHagenring 3038106BraunschweigGermany
| | - Pia Marter
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbHInhoffenstraße 7B38124BraunschweigGermany
| | - Sixing Huang
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbHInhoffenstraße 7B38124BraunschweigGermany
| | - Silke Pradella
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbHInhoffenstraße 7B38124BraunschweigGermany
| | - Jörn Petersen
- Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbHInhoffenstraße 7B38124BraunschweigGermany
| | - Stefan Schulz
- Institut für Organische ChemieTechnische Universität BraunschweigHagenring 3038106BraunschweigGermany
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4
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Srivastava N, Sarethy IP, Jeevanandam J, Danquah M. Emerging strategies for microbial screening of novel chemotherapeutics. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Huang W, Liu F, Wang K, Sidorenko A, Bei M, Zhang Z, Fang W, Li M, Gu Y, Ke S. Sc(OTf)3-catalyzed synthesis of polysubstituted furans from acylacetonitriles and renewable acetol. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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6
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Hai Y, Wei MY, Wang CY, Gu YC, Shao CL. The intriguing chemistry and biology of sulfur-containing natural products from marine microorganisms (1987-2020). MARINE LIFE SCIENCE & TECHNOLOGY 2021; 3:488-518. [PMID: 37073258 PMCID: PMC10077240 DOI: 10.1007/s42995-021-00101-2] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 03/18/2021] [Indexed: 05/03/2023]
Abstract
Natural products derived from marine microorganisms have received great attention as a potential resource of new compound entities for drug discovery. The unique marine environment brings us a large group of sulfur-containing natural products with abundant biological functionality including antitumor, antibiotic, anti-inflammatory and antiviral activities. We reviewed all the 484 sulfur-containing natural products (non-sulfated) isolated from marine microorganisms, of which 59.9% are thioethers, 29.8% are thiazole/thiazoline-containing compounds and 10.3% are sulfoxides, sulfones, thioesters and many others. A selection of 133 compounds was further discussed on their structure-activity relationships, mechanisms of action, biosynthesis, and druggability. This is the first systematic review on sulfur-containing natural products from marine microorganisms conducted from January 1987, when the first one was reported, to December 2020. Supplementary Information The online version contains supplementary material available at 10.1007/s42995-021-00101-2.
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Affiliation(s)
- Yang Hai
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
| | - Mei-Yan Wei
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, Qingdao, 266003 China
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003 China
| | - Chang-Yun Wang
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
| | - Yu-Cheng Gu
- Syngenta Jealott’s Hill International Research Centre, Bracknell, Berkshire RG42 6EY UK
| | - Chang-Lun Shao
- Key Laboratory of Marine Drugs, School of Medicine and Pharmacy, The Ministry of Education of China, Ocean University of China, Qingdao, 266003 China
- Laboratory for Marine Drugs and Bioproducts, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao, 266237 China
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7
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Wolter LA, Wietz M, Ziesche L, Breider S, Leinberger J, Poehlein A, Daniel R, Schulz S, Brinkhoff T. Pseudooceanicola algae sp. nov., isolated from the marine macroalga Fucus spiralis, shows genomic and physiological adaptations for an algae-associated lifestyle. Syst Appl Microbiol 2021; 44:126166. [PMID: 33310406 DOI: 10.1016/j.syapm.2020.126166] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 11/09/2020] [Accepted: 11/12/2020] [Indexed: 12/23/2022]
Abstract
The genus Pseudooceanicola from the alphaproteobacterial Roseobacter group currently includes ten validated species. We herein describe strain Lw-13eT, the first Pseudooceanicola species from marine macroalgae, isolated from the brown alga Fucus spiralis abundant at European and North American coasts. Physiological and pangenome analyses of Lw-13eT showed corresponding adaptive features. Adaptations to the tidal environment include a broad salinity tolerance, degradation of macroalgae-derived substrates (mannitol, mannose, proline), and resistance to several antibiotics and heavy metals. Notably, Lw-13eT can degrade oligomeric alginate via PL15 alginate lyase encoded in a polysaccharide utilization locus (PUL), rarely described for roseobacters to date. Plasmid localization of the PUL strengthens the importance of mobile genetic elements for evolutionary adaptations within the Roseobacter group. PL15 homologs were primarily detected in marine plant-associated metagenomes from coastal environments but not in the open ocean, corroborating its adaptive role in algae-rich habitats. Exceptional is the tolerance of Lw-13eT against the broad-spectrum antibiotic tropodithietic acid, produced by Phaeobacter spp. co-occurring in coastal habitats. Furthermore, Lw-13eT exhibits features resembling terrestrial plant-bacteria associations, i.e. biosynthesis of siderophores, terpenes and volatiles, which may contribute to mutual bacteria-algae interactions. Closest described relative of Lw-13eT is Pseudopuniceibacterium sediminis CY03T with 98.4% 16S rRNA gene sequence similarity. However, protein sequence-based core genome phylogeny and average nucleotide identity indicate affiliation of Lw-13eT with the genus Pseudooceanicola. Based on phylogenetic, physiological and (chemo)taxonomic distinctions, we propose strain Lw-13eT (=DSM 29013T=LMG 30557T) as a novel species with the name Pseudooceanicola algae.
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Affiliation(s)
- Laura A Wolter
- Institute for Chemistry and Biology of the Marine Environment, Oldenburg, Germany; JST ERATO Nomura Project, Faculty of Life and Environmental Sciences, Tsukuba, Japan.
| | - Matthias Wietz
- Institute for Chemistry and Biology of the Marine Environment, Oldenburg, Germany; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
| | - Lisa Ziesche
- Institute of Organic Chemistry, Technische Universität Braunschweig, Germany
| | - Sven Breider
- Institute for Chemistry and Biology of the Marine Environment, Oldenburg, Germany
| | - Janina Leinberger
- Institute for Chemistry and Biology of the Marine Environment, Oldenburg, Germany
| | - Anja Poehlein
- Institute of Microbiology and Genetics, Genomic and Applied Microbiology, and Göttingen Genomics Laboratory, Germany
| | - Rolf Daniel
- Institute of Microbiology and Genetics, Genomic and Applied Microbiology, and Göttingen Genomics Laboratory, Germany
| | - Stefan Schulz
- Institute of Organic Chemistry, Technische Universität Braunschweig, Germany
| | - Thorsten Brinkhoff
- Institute for Chemistry and Biology of the Marine Environment, Oldenburg, Germany.
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8
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Schlawis C, Schulz S. Direct deposition GC/IR techniques in natural product identification. Nat Prod Rep 2020; 37:1561-1567. [PMID: 32490464 DOI: 10.1039/d0np00013b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: up to the end of 2019 The application of coupled gas chromatography/direct deposition Fourier transform infrared (GC/DD-FTIR) spectroscopy in the field of volatile natural product identification yields orthogonal information to GC/MS analysis about functional groups and C-C double bonds. This underused method facilitates structure elucidation of trace compounds and can be combined with modern DFT-calculation to further improve the usefulness of the obtained results.
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Affiliation(s)
- Christian Schlawis
- Institut für Organische Chemie, TU Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
| | - Stefan Schulz
- Institut für Organische Chemie, TU Braunschweig, Hagenring 30, 38106 Braunschweig, Germany.
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9
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Kim H, Kim S, Kim M, Lee C, Yang I, Nam SJ. Bioactive natural products from the genus Salinospora: a review. Arch Pharm Res 2020; 43:1230-1258. [PMID: 33237436 DOI: 10.1007/s12272-020-01288-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 11/13/2020] [Indexed: 12/29/2022]
Abstract
Actinomycetes are an important source for bioactive secondary metabolites. Among them, the genus Salinispora is one of the first salt obligatory marine species worldwide and is typically found in various types of substrates in tropical and subtropical marine environments including sediments and marine organisms. This genus produces a wide range of chemical scaffolds and bioactive compounds such as lomaiviticins, cyclomarins, rifamycins, salinaphthoquinones, and salinosporamides. This review arranged Salinispora derived secondary metabolites according to the three species that comprise the genus. Moreover, muta- and semi-synthesis analogs derived from salinosporamide were also described in this review.
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Affiliation(s)
- Haerin Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Sohee Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Minju Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Chaeyoung Lee
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Inho Yang
- Department of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean University, Pusan, 49112, Korea.
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea.
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10
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Tikhonova TA, Ilment NV, Lyssenko KA, Zavarzin IV, Volkova YA. Sulfur-mediated synthesis of unsymmetrically substituted N-aryl oxalamides by the cascade thioamidation/cyclocondensation and hydrolysis reaction. Org Biomol Chem 2020; 18:5050-5060. [PMID: 32578650 DOI: 10.1039/d0ob00811g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile and straightforward synthesis of unsymmetrically substituted N-aryl oxalamides from 2,2'-biphenyldiamines, 2-chloroacetic acid derivatives, elemental sulfur, and water has been developed. This protocol is distinguished by efficiency in water under metal-free conditions for N-aryl oxalamides bearing a side-chain NH2-group; it can be adapted for scale-up synthesis. The scope and limitations of this transformation have been investigated.
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Affiliation(s)
- Tatyana A Tikhonova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russian Federation.
| | - Nikita V Ilment
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russian Federation.
| | - Konstantin A Lyssenko
- G.V. Plekhanov Russian University of Economics, 36 Stremyanny Per., Moscow 117997, Russian Federation and Department of Chemistry, M.V. Lomonosov Moscow State University, 119991 Moscow, Russian Federation
| | - Igor V Zavarzin
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russian Federation.
| | - Yulia A Volkova
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 119991, Moscow, Russian Federation.
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11
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Schlawis C, Harig T, Ehlers S, Guillen‐Matus DG, Creamer KE, Jensen PR, Schulz S. Extending the Salinilactone Family. Chembiochem 2020; 21:1629-1632. [PMID: 31957947 PMCID: PMC7317194 DOI: 10.1002/cbic.201900764] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Indexed: 01/20/2023]
Abstract
Five new members of the salinilactone family, salinilactones D-H, are reported. These bicyclic lactones are produced by Salinispora bacteria and display extended or shortened alkyl side chains relative to the recently reported salinilactones A-C. They were identified by GC/MS, gas chromatographic retention index, and comparison with synthetic samples. We further investigated the occurrence of salinilactones across six newly proposed Salinispora species to gain insight into how compound production varies among taxa. The growth-inhibiting effect of this compound family on multiple biological systems including non-Salinispora actinomycetes was analyzed. Additionally, we found strong evidence for significant cytotoxicity of the title compounds.
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Affiliation(s)
- Christian Schlawis
- Institut für Organische ChemieTU BraunschweigHagenring 3038106BraunschweigGermany
| | - Tim Harig
- Institut für Organische ChemieTU BraunschweigHagenring 3038106BraunschweigGermany
| | - Stephanie Ehlers
- Institut für Organische ChemieTU BraunschweigHagenring 3038106BraunschweigGermany
| | - Dulce G. Guillen‐Matus
- Scripps Institution of OceanographyUniversity of California San Diego9500 Gilman DriveLa JollaCA92093-0204USA
| | - Kaitlin E. Creamer
- Scripps Institution of OceanographyUniversity of California San Diego9500 Gilman DriveLa JollaCA92093-0204USA
| | - Paul R. Jensen
- Scripps Institution of OceanographyUniversity of California San Diego9500 Gilman DriveLa JollaCA92093-0204USA
| | - Stefan Schulz
- Institut für Organische ChemieTU BraunschweigHagenring 3038106BraunschweigGermany
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12
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Flowers of European pear release common and uncommon volatiles that can be detected by honey bee pollinators. CHEMOECOLOGY 2019. [DOI: 10.1007/s00049-019-00289-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Abstract
Floral scents are important pollinator attractants, but there is limited knowledge about the importance of single components in plant–pollinator interactions. This especially is true in crop pollination systems. The aim of this study is to identify floral volatiles of several European pear cultivars (Pyrus communis L.), and to determine their potential in eliciting physiological responses in antennae of honey bees (Apis mellifera L.), the most important pollinators of pear. Volatiles were collected by dynamic headspace and analysed by (high resolution) gas chromatography coupled to mass spectrometry (GC/MS) and nuclear magnetic resonance spectroscopy. Antennal responses were investigated by GC coupled to electroantennographic detection (GC/EAD). We trapped in the mean 256 ng of scent per flower and hour (flower−1 h−1) from the different cultivars with either linalool + methyl benzoate or methyl 2-hydroxy-3-methylpentanoate as most abundant compounds. Of the 108 detected pear floral scent components, 17 were electrophysiologically active in honey bee antennae. Among these compounds were (E)-N-(2-methylbutyl)- and (E)-N-(3-methylbutyl)-1-(pyridin-3-yl)methanimine, which were not known from nature before to the best of our knowledge. Most other compounds identified as flower scent in pear are widespread compounds, known from flowers of various other species. Our results provide new insights in the floral volatile chemistry of an important insect-pollinated crop and show for the first time that honey bees have the olfactory ability to detect several pear floral volatiles. These data are an important basis for more detailed studies of the olfactory communication between honey bees and European pear flowers and might in the long term be used to manipulate the attractiveness of pear to obtain optimal fruit set.
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13
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Schmidt R, Ulanova D, Wick LY, Bode HB, Garbeva P. Microbe-driven chemical ecology: past, present and future. ISME JOURNAL 2019; 13:2656-2663. [PMID: 31289346 DOI: 10.1038/s41396-019-0469-x] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 11/09/2022]
Abstract
In recent years, research in the field of Microbial Ecology has revealed the tremendous diversity and complexity of microbial communities across different ecosystems. Microbes play a major role in ecosystem functioning and contribute to the health and fitness of higher organisms. Scientists are now facing many technological and methodological challenges in analyzing these complex natural microbial communities. The advances in analytical and omics techniques have shown that microbial communities are largely shaped by chemical interaction networks mediated by specialized (water-soluble and volatile) metabolites. However, studies concerning microbial chemical interactions need to consider biotic and abiotic factors on multidimensional levels, which require the development of new tools and approaches mimicking natural microbial habitats. In this review, we describe environmental factors affecting the production and transport of specialized metabolites. We evaluate their ecological functions and discuss approaches to address future challenges in microbial chemical ecology (MCE). We aim to emphasize that future developments in the field of MCE will need to include holistic studies involving organisms at all levels and to consider mechanisms underlying the interactions between viruses, micro-, and macro-organisms in their natural environments.
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Affiliation(s)
- Ruth Schmidt
- INRS-Institut Armand-Frappier, Laval, H7V 1B7, Canada.,Quebec Center for Biodiversity Sciences (QCBS), H3A 1B1, Montréal, Canada
| | - Dana Ulanova
- Faculty of Agriculture and Marine Science, Kochi University, Kochi, 783-8502, Japan.,Center for Advanced Marine Core Research, Kochi University, Kochi, 783-8502, Japan
| | - Lukas Y Wick
- Department of Environmental Microbiology, Helmholtz Centre for Environmental Research - UFZ, D-04318, Leipzig, Germany
| | - Helge B Bode
- Molecular Biotechnology, Department of Biosciences and Buchmann Institute for Molecular Life Sciences (BMLS), Goethe Universität Frankfurt, Frankfurt am Main, 60438, Germany
| | - Paolina Garbeva
- Netherlands Institute of Ecology, Wageningen, 6708 PB, The Netherlands.
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14
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Abstract
Covering: January to December 2017This review covers the literature published in 2017 for marine natural products (MNPs), with 740 citations (723 for the period January to December 2017) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1490 in 477 papers for 2017), together with the relevant biological activities, source organisms and country of origin. Reviews, biosynthetic studies, first syntheses, and syntheses that led to the revision of structures or stereochemistries, have been included. Geographic distributions of MNPs at a phylogenetic level are reported.
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Affiliation(s)
- Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Australia. and Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Brent R Copp
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | - Rohan A Davis
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Australia
| | - Robert A Keyzers
- Centre for Biodiscovery, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand
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Berlinck RGS, Monteiro AF, Bertonha AF, Bernardi DI, Gubiani JR, Slivinski J, Michaliski LF, Tonon LAC, Venancio VA, Freire VF. Approaches for the isolation and identification of hydrophilic, light-sensitive, volatile and minor natural products. Nat Prod Rep 2019; 36:981-1004. [DOI: 10.1039/c9np00009g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Water-soluble, volatile, minor and photosensitive natural products are yet poorly known, and this review discusses the literature reporting the isolation strategies for some of these metabolites.
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Affiliation(s)
| | - Afif F. Monteiro
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Ariane F. Bertonha
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Darlon I. Bernardi
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Juliana R. Gubiani
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Juliano Slivinski
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | | | | | - Victor A. Venancio
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
| | - Vitor F. Freire
- Instituto de Química de São Carlos
- Universidade de São Paulo
- São Carlos
- Brazil
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