1
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Kimber MC, Lee DS. The Kornblum DeLaMare rearrangement in natural product synthesis: 25 years of innovation. Nat Prod Rep 2024; 41:813-833. [PMID: 38294038 DOI: 10.1039/d3np00058c] [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: 02/01/2024]
Abstract
Covering: 1998 up to the end of 2023Since its initial disclosure in 1951, the Kornblum DeLaMare rearrangement has proved an important synthetic transformation and has been widely adopted as a biomimetic step in natural product synthesis. Utilising the base catalysed decomposition of alkyl peroxides to yield a ketone and alcohol has found use in many syntheses as well as a key strategic step, including the unmasking of furans, as a biomimetic synthetic tool, and the use of the rearrangement to install oxygen enantioselectively. Since ca. 1998, its impact as a synthetic transformation has grown significantly, especially given the frequency of use in natural product syntheses, therefore this 25 year time period will be the focus of the review.
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Affiliation(s)
- Marc C Kimber
- Department of Chemistry, School of Science, Loughborough University, Loughborough, LE11 3TU, UK.
| | - Darren S Lee
- Centre for Green Chemistry and Green Engineering at Yale, Yale University, New Haven, CT 06511, USA.
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2
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Machino K, Sakakibara Y, Osada K, Ochiai T, Uraki Y, Shigetomi K. Pseudomonas bohemica strain ins3 eliminates antibacterial hinokitiol from its culture broth. Biosci Biotechnol Biochem 2023; 87:236-239. [PMID: 36367540 DOI: 10.1093/bbb/zbac180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 11/07/2022] [Indexed: 11/13/2022]
Abstract
A bacterial strain, Pseudomonas bohemica strain ins3 was newly isolated as a resistant strain against high concentrations of hinokitiol. This strain was revealed not only to show resistance but also completely remove this compound from its culture broth. In addition, its mechanism was revealed to be independent of conventional aromatic dioxygenases, ie catechol-1,2- or 2,3-dioxygenases.
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Affiliation(s)
- Ken Machino
- Graduate School of Agriculture, Hokkaido University, Sapporo, Japan
| | | | - Kota Osada
- School of Agriculture, Hokkaido University, Sapporo, Japan
| | - Takahiro Ochiai
- Graduate School of Agriculture, Hokkaido University, Sapporo, Japan
| | - Yasumitsu Uraki
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Kengo Shigetomi
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
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3
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Palai BB, Panda SS, Sharma NK. Synthesis of Aminotroponyl-/Difluoroboronyl Aminotroponyl Deoxyuridine Phosphoramidites. Curr Protoc 2022; 2:e609. [PMID: 36541868 DOI: 10.1002/cpz1.609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This report describes the chemical synthesis of aminotroponyl-conjugated deoxyuridine analog (at-dU) and its difluoroboron complex (dfbat-dU) and their phosphoramidites by using the versatile phosphorylating reagent 2-Cyanoethyl N,N-diisopropylchlorophosphoramidite. Tropolone is a non-benzenoid aromatic bioactive natural fluorescent molecule, possessing intramolecular charge transfer and metal chelating properties with transition metal ions such as Cu2+/ Zn2+/ Ni2+ . Its synthetic derivatives, 2-aminotropones also exhibit unique bioactivities and are considered potential therapeutic drug candidate. Recently, the fluorescence properties of aminotropone has improved by complexing with difluoroboron residue that generates aminotroponyl-BODIPY analog. These could be employed for the synthesis of at-dU/dfbat-dU containing DNA oligonucleotides for designing the 11 B/19 F-NMR/fluorescence-based DNA probes. © 2022 Wiley Periodicals LLC. Basic Protocol 1: Synthesis of N-propargyl-2-aminotropone (2) and difluoroboronyl N-propargyl-2-aminotropone (3) molecules. Basic Protocol 2: Synthesis of N-propargyl-2-aminotroponyl deoxyuridinyl (at-dU) phosphoramidites (7). Basic Protocol 3: Synthesis of difluoroboronyl N-propargyl-2-aminotroponyl deoxyuridinyl (dfbat-dU) phosphoramidites (10).
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Affiliation(s)
- Bibhuti Bhusana Palai
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Jatani, Odisha, India.,Homi Bhabha National Institute (HBNI)-Mumbai, Mumbai, India
| | - Subhashree S Panda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Jatani, Odisha, India.,Homi Bhabha National Institute (HBNI)-Mumbai, Mumbai, India
| | - Nagendra K Sharma
- School of Chemical Sciences, National Institute of Science Education and Research (NISER) Bhubaneswar, Jatani, Odisha, India.,Homi Bhabha National Institute (HBNI)-Mumbai, Mumbai, India
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4
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Gerke J, Köhler AM, Wennrich JP, Große V, Shao L, Heinrich AK, Bode HB, Chen W, Surup F, Braus GH. Biosynthesis of Antibacterial Iron-Chelating Tropolones in Aspergillus nidulans as Response to Glycopeptide-Producing Streptomycetes. FRONTIERS IN FUNGAL BIOLOGY 2022; 2:777474. [PMID: 37744088 PMCID: PMC10512232 DOI: 10.3389/ffunb.2021.777474] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 12/06/2021] [Indexed: 09/26/2023]
Abstract
The soil microbiome comprises numerous filamentous fungi and bacteria that mutually react and challenge each other by the production of bioactive secondary metabolites. Herein, we show in liquid co-cultures that the presence of filamentous Streptomycetes producing antifungal glycopeptide antibiotics induces the production of the antibacterial and iron-chelating tropolones anhydrosepedonin (1) and antibiotic C (2) in the mold Aspergillus nidulans. Additionally, the biosynthesis of the related polyketide tripyrnidone (5) was induced, whose novel tricyclic scaffold we elucidated by NMR and HRESIMS data. The corresponding biosynthetic polyketide synthase-encoding gene cluster responsible for the production of these compounds was identified. The tropolones as well as tripyrnidone (5) are produced by genes that belong to the broad reservoir of the fungal genome for the synthesis of different secondary metabolites, which are usually silenced under standard laboratory conditions. These molecules might be part of the bacterium-fungus competition in the complex soil environment, with the bacterial glycopeptide antibiotic as specific environmental trigger for fungal induction of this cluster.
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Affiliation(s)
- Jennifer Gerke
- Department of Moleuclar Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), Georg-August-Universität Göttingen, Göttingen, Germany
| | - Anna M. Köhler
- Department of Moleuclar Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), Georg-August-Universität Göttingen, Göttingen, Germany
| | - Jan-Peer Wennrich
- Microbial Drugs Department, Helmholtz Centre for Infection Research (HZI), Braunschweig, Germany
- German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Verena Große
- Department of Moleuclar Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), Georg-August-Universität Göttingen, Göttingen, Germany
| | - Lulu Shao
- Microbial Drugs Department, Helmholtz Centre for Infection Research (HZI), Braunschweig, Germany
- German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Antje K. Heinrich
- Molecular Biotechnology, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Helge B. Bode
- Molecular Biotechnology, Goethe University Frankfurt, Frankfurt am Main, Germany
- Department of Natural Products in Organismic Interactions, Max Planck Institute for Terrestrial Microbiology, Marburg, Germany
| | - Wanping Chen
- Department of Moleuclar Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), Georg-August-Universität Göttingen, Göttingen, Germany
| | - Frank Surup
- Microbial Drugs Department, Helmholtz Centre for Infection Research (HZI), Braunschweig, Germany
- German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Braunschweig, Germany
| | - Gerhard H. Braus
- Department of Moleuclar Microbiology and Genetics and Göttingen Center for Molecular Biosciences (GZMB), Georg-August-Universität Göttingen, Göttingen, Germany
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5
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Lyczko K, Lyczko M, Banasiewicz M, Wegrzynska K, Ziółko A, Baraniak A, Dobrowolski JC. Thallium(I) Tropolonates: Synthesis, Structure, Spectral Characteristics, and Antimicrobial Activity Compared to Lead(II) and Bismuth(III) Analogues. Molecules 2021; 27:molecules27010183. [PMID: 35011415 PMCID: PMC8746424 DOI: 10.3390/molecules27010183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/27/2021] [Accepted: 12/27/2021] [Indexed: 11/16/2022] Open
Abstract
Synthesis, single-crystal X-ray determination diffraction and FT-IR, NMR (1H, 13C, 19F and 205Tl), UV–vis, and luminescence spectra characteristics were described for series of thallium(I) compounds: thallium(I) triflate (Tl(OTf)), 1:1 co-crystals of thallium(I) triflate and tropolone (Htrop), Tl(OTf)·Htrop, as well as simple thallium(I) chelates: Tl(trop) (1), Tl(5-metrop) (2), Tl(hino) (3), with Htrop, 5-methyltropolone (5-meHtrop), 4-isopropyltropolone (hinokitiol, Hhino), respectively, and additionally more complex {Tl@[Tl(hino)]6}(OTf) (4) compound. Comparison of their antimicrobial activity with selected lead(II) and bismuth(III) analogs and free ligands showed that only bismuth(III) complexes demonstrated significant antimicrobial activity, from two- to fivefold larger than the free ligands.
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Affiliation(s)
- Krzysztof Lyczko
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.L.); (J.C.D.)
- Correspondence:
| | - Monika Lyczko
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.L.); (J.C.D.)
| | | | - Karolina Wegrzynska
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
| | - Anna Ziółko
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
| | - Anna Baraniak
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
| | - Jan Cz. Dobrowolski
- Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195 Warsaw, Poland; (M.L.); (J.C.D.)
- National Medicines Institute, Chełmska 30/34, 00-725 Warsaw, Poland; (K.W.); (A.Z.); (A.B.)
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6
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Abstract
Hinokitiol is a natural bioactive compound found in several aromatic and medicinal plants. It is a terpenoid synthetized and secreted by different species as secondary metabolites. This volatile compound was tested and explored for its different biological properties. In this review, we report the pharmacological properties of hinokitiol by focusing mainly on its anticancer mechanisms. Indeed, it can block cell transformation at different levels by its action on the cell cycle, apoptosis, autophagy via inhibiting gene expression and dysregulating cellular signaling pathways. Moreover, hinokitiol also exhibits other pharmacological properties, including antidiabetic, anti-inflammatory, and antimicrobial effects. It showed multiple and several effects through its inhibition, interaction and/or activation of the main cellular targets inducing these pathologies.
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7
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Bach E, Passaglia LMP, Jiao J, Gross H. Burkholderia in the genomic era: from taxonomy to the discovery of new antimicrobial secondary metabolites. Crit Rev Microbiol 2021; 48:121-160. [PMID: 34346791 DOI: 10.1080/1040841x.2021.1946009] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Species of Burkholderia are highly versatile being found not only abundantly in soil, but also as plants and animals' commensals or pathogens. Their complex multireplicon genomes harbour an impressive number of polyketide synthase (PKS) and nonribosomal peptide-synthetase (NRPS) genes coding for the production of antimicrobial secondary metabolites (SMs), which have been successfully deciphered by genome-guided tools. Moreover, genome metrics supported the split of this genus into Burkholderia sensu stricto (s.s.) and five new other genera. Here, we show that the successful antimicrobial SMs producers belong to Burkholderia s.s. Additionally, we reviewed the occurrence, bioactivities, modes of action, structural, and biosynthetic information of thirty-eight Burkholderia antimicrobial SMs shedding light on their diversity, complexity, and uniqueness as well as the importance of genome-guided strategies to facilitate their discovery. Several Burkholderia NRPS and PKS display unusual features, which are reflected in their structural diversity, important bioactivities, and varied modes of action. Up to now, it is possible to observe a general tendency of Burkholderia SMs being more active against fungi. Although the modes of action and biosynthetic gene clusters of many SMs remain unknown, we highlight the potential of Burkholderia SMs as alternatives to fight against new diseases and antibiotic resistance.
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Affiliation(s)
- Evelise Bach
- Departamento de Genética and Programa de Pós-graduação em Genética e Biologia Molecular, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Luciane Maria Pereira Passaglia
- Departamento de Genética and Programa de Pós-graduação em Genética e Biologia Molecular, Instituto de Biociências, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Junjing Jiao
- Department for Pharmaceutical Biology, Pharmaceutical Institute, University of Tübingen, Tübingen, Germany
| | - Harald Gross
- Department for Pharmaceutical Biology, Pharmaceutical Institute, University of Tübingen, Tübingen, Germany
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8
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Matuszewska M, Maciąg T, Rajewska M, Wierzbicka A, Jafra S. The carbon source-dependent pattern of antimicrobial activity and gene expression in Pseudomonas donghuensis P482. Sci Rep 2021; 11:10994. [PMID: 34040089 PMCID: PMC8154892 DOI: 10.1038/s41598-021-90488-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 05/12/2021] [Indexed: 02/04/2023] Open
Abstract
Pseudomonas donghuensis P482 is a tomato rhizosphere isolate with the ability to inhibit growth of bacterial and fungal plant pathogens. Herein, we analysed the impact of the carbon source on the antibacterial activity of P482 and expression of the selected genes of three genomic regions in the P482 genome. These regions are involved in the synthesis of pyoverdine, 7-hydroxytropolone (7-HT) and an unknown compound ("cluster 17") and are responsible for the antimicrobial activity of P482. We showed that the P482 mutants, defective in these regions, show variations and contrasting patterns of growth inhibition of the target pathogen under given nutritional conditions (with glucose or glycerol as a carbon source). We also selected and validated the reference genes for gene expression studies in P. donghuensis P482. Amongst ten candidate genes, we found gyrB, rpoD and mrdA the most stably expressed. Using selected reference genes in RT-qPCR, we assessed the expression of the genes of interest under minimal medium conditions with glucose or glycerol as carbon sources. Glycerol was shown to negatively affect the expression of genes necessary for 7-HT synthesis. The significance of this finding in the light of the role of nutrient (carbon) availability in biological plant protection is discussed.
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Affiliation(s)
- Marta Matuszewska
- Laboratory of Plant Microbiology, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Tomasz Maciąg
- Laboratory of Plant Microbiology, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Magdalena Rajewska
- Laboratory of Plant Microbiology, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Aldona Wierzbicka
- Laboratory of Plant Microbiology, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland
| | - Sylwia Jafra
- Laboratory of Plant Microbiology, Intercollegiate Faculty of Biotechnology of University of Gdansk and Medical University of Gdansk, University of Gdansk, Gdansk, Poland.
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9
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Sakakibara Y, Osada K, Uraki Y, Ubukata M, Shigetomi K. Direct deuteration of hinokitiol and its mechanistic study. Biosci Biotechnol Biochem 2021; 85:215-222. [PMID: 33590006 DOI: 10.1093/bbb/zbaa031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 09/05/2020] [Indexed: 11/14/2022]
Abstract
Hinokitiol has a broad antibacterial activity against bacteria and fungi. While its biosynthetic pathway has been intensively studied, its dynamics in natural environments, such as biodegradation pathway, remain unclear. In this study, the authors report a direct deuterium labeling of hinokitiol as a traceable molecular probe to serve those studies. Hinokitiol was subjected to the H2-Pd/C-D2O conditions and deuterated hinokitiol was obtained with excellent deuteration efficiencies and in moderate yield. The 1H and 2H NMR spectra indicated that all ring- and aliphatic hydrogens except that on C-6 were substituted by deuterium. According to the substrate scope and computational chemistry, deuteration on tropolone ring was suggested to proceed via D+-mediated process, and which was supported by the results of the experiment with trifluoroacetic acid and Pd(TPP)4. On the other hand, the deuteration on aliphatic group was predicted to be catalyzed by Pd(II) species.
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Affiliation(s)
| | - Kota Osada
- School of Agriculture, Hokkaido University, Sapporo, Japan
| | - Yasumitsu Uraki
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Makoto Ubukata
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
| | - Kengo Shigetomi
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
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10
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Inhibition of Fast Nerve Conduction Produced by Analgesics and Analgesic Adjuvants-Possible Involvement in Pain Alleviation. Pharmaceuticals (Basel) 2020; 13:ph13040062. [PMID: 32260535 PMCID: PMC7243109 DOI: 10.3390/ph13040062] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 03/29/2020] [Accepted: 04/01/2020] [Indexed: 02/07/2023] Open
Abstract
Nociceptive information is transmitted from the periphery to the cerebral cortex mainly by action potential (AP) conduction in nerve fibers and chemical transmission at synapses. Although this nociceptive transmission is largely inhibited at synapses by analgesics and their adjuvants, it is possible that the antinociceptive drugs inhibit nerve AP conduction, contributing to their antinociceptive effects. Many of the drugs are reported to inhibit the nerve conduction of AP and voltage-gated Na+ and K+ channels involved in its production. Compound action potential (CAP) is a useful measure to know whether drugs act on nerve AP conduction. Clinically-used analgesics and analgesic adjuvants (opioids, non-steroidal anti-inflammatory drugs, 2-adrenoceptor agonists, antiepileptics, antidepressants and local anesthetics) were found to inhibit fast-conducting CAPs recorded from the frog sciatic nerve by using the air-gap method. Similar actions were produced by antinociceptive plant-derived chemicals. Their inhibitory actions depended on the concentrations and chemical structures of the drugs. This review article will mention the inhibitory actions of the antinociceptive compounds on CAPs in frog and mammalian peripheral (particularly, sciatic) nerves and on voltage-gated Na+ and K+ channels involved in AP production. Nerve AP conduction inhibition produced by analgesics and analgesic adjuvants is suggested to contribute to at least a part of their antinociceptive effects.
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11
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Krucinska J, Falcone E, Erlandsen H, Hazeen A, Lombardo MN, Estrada A, Robinson VL, Anderson AC, Wright DL. Structural and Functional Studies of Bacterial Enolase, a Potential Target against Gram-Negative Pathogens. Biochemistry 2019; 58:1188-1197. [PMID: 30714720 DOI: 10.1021/acs.biochem.8b01298] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Enolase is a glycolytic metalloenzyme involved in carbon metabolism. The advantage of targeting enolase lies in its essentiality in many biological processes such as cell wall formation and RNA turnover and as a plasminogen receptor. We initially used a DARTS assay to identify enolase as a target in Escherichia coli. The antibacterial activities of α-, β-, and γ-substituted seven-member ring tropolones were first evaluated against four strains representing a range of Gram-negative bacteria. We observed that the chemical properties and position of the substituents on the tropolone ring play an important role in the biological activity of the investigated compounds. Both α- and β-substituted phenyl derivatives of tropolone were the most active with minimum inhibitory concentrations in the range of 11-14 μg/mL. The potential inhibitory activity of the synthetic tropolones was further evaluated using an enolase inhibition assay, X-ray crystallography, and molecular docking simulations. The catalytic activity of enolase was effectively inhibited by both the naturally occurring β-thujaplicin and the α- and β-substituted phenyl derivatives of tropolones with IC50 values in range of 8-11 μM. Ligand binding parameters were assessed by isothermal titration calorimetry and differential scanning calorimetry techniques and agreed with the in vitro data. Our studies validate the antibacterial potential of tropolones with careful consideration of the position and character of chelating moieties for stronger interaction with metal ions and residues in the enolase active site.
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Affiliation(s)
- Jolanta Krucinska
- Department of Pharmaceutical Sciences , University of Connecticut , 69 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Eric Falcone
- Department of Pharmaceutical Sciences , University of Connecticut , 69 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Heidi Erlandsen
- Center for Open Research Resources & Equipment (COR2E) , University of Connecticut , 91 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Akram Hazeen
- Department of Chemistry , University of Connecticut , 55 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Michael N Lombardo
- Department of Pharmaceutical Sciences , University of Connecticut , 69 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Alexavier Estrada
- Department of Pharmaceutical Sciences , University of Connecticut , 69 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Victoria L Robinson
- Department of Molecular and Cellular Biology , University of Connecticut , 91 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Amy C Anderson
- Department of Pharmaceutical Sciences , University of Connecticut , 69 North Eagleville Road , Storrs , Connecticut 06269 , United States
| | - Dennis L Wright
- Department of Pharmaceutical Sciences , University of Connecticut , 69 North Eagleville Road , Storrs , Connecticut 06269 , United States.,Department of Chemistry , University of Connecticut , 55 North Eagleville Road , Storrs , Connecticut 06269 , United States
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12
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Cao F, Orth C, Donlin MJ, Adegboyega P, Meyers MJ, Murelli RP, Elagawany M, Elgendy B, Tavis JE. Synthesis and Evaluation of Troponoids as a New Class of Antibiotics. ACS OMEGA 2018; 3:15125-15133. [PMID: 30533576 PMCID: PMC6275967 DOI: 10.1021/acsomega.8b01754] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 10/19/2018] [Indexed: 05/11/2023]
Abstract
Novel antibiotics are urgently needed. The troponoids [tropones, tropolones, and α-hydroxytropolones (α-HT)] can have anti-bacterial activity. We synthesized or purchased 92 troponoids and evaluated their antibacterial activities against Staphylococcus aureus, Escherichia coli, Acinetobacter baumannii, and Pseudomonas aeruginosa. Preliminary hits were assessed for minimum inhibitory concentrations (MIC80) and cytotoxicity (CC50) against human hepatoma cells. Sixteen troponoids inhibited S. aureus/E. coli/A. baumannii growth by ≥80% growth at <30 μM with CC50 values >50 μM. Two selected tropolones (63 and 285) inhibited 18 methicillin-resistant S. aureus (MRSA) strains with similar MIC80 values as against a reference strain. Two selected thiotropolones (284 and 363) inhibited multidrug-resistant (MDR) E. coli with MIC80 ≤30 μM. One α-HT (261) inhibited MDR-A. baumannii with MIC80 ≤30 μM. This study opens new avenues for development of novel troponoid antibiotics to address the critical need to combat MDR bacterial infections.
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Affiliation(s)
- Feng Cao
- John
Cochran Division, Department of Veterans Affairs Medical Center, 915 North Grand Blvd., St. Louis, Missouri 63106, United States
- E-mail: . Phone: +1 (314) 289-6358. Fax: +1(314) 289-7920 (F.C.)
| | - Cari Orth
- John
Cochran Division, Department of Veterans Affairs Medical Center, 915 North Grand Blvd., St. Louis, Missouri 63106, United States
| | - Maureen J. Donlin
- Edward
A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, Missouri 63104, United States
| | - Patrick Adegboyega
- John
Cochran Division, Department of Veterans Affairs Medical Center, 915 North Grand Blvd., St. Louis, Missouri 63106, United States
| | - Marvin J. Meyers
- Department
of Chemistry, Saint Louis University, St. Louis, Missouri 63104, United States
| | - Ryan P. Murelli
- Department
of Chemistry, Brooklyn College, The City
University of New York, Brooklyn, New York 11210, United States
- PhD
Program in Chemistry, The Graduate Center
of The City University of New York, New York 10016, United
States
| | - Mohamed Elagawany
- Center for
Clinical Pharmacology, Washington University
School of Medicine and St. Louis College of Pharmacy, St. Louis, Missouri 63110, United States
- Department
of Pharmaceutical Chemistry, Faculty of Pharmacy, Damanhour University, Damanhour 31111, Egypt
| | - Bahaa Elgendy
- Center for
Clinical Pharmacology, Washington University
School of Medicine and St. Louis College of Pharmacy, St. Louis, Missouri 63110, United States
- Chemistry
Department, Faculty of Science, Benha University, Benha 13518, Egypt
| | - John E. Tavis
- Department
of Molecular Microbiology and Immunology, The Saint Louis University Liver Center, Saint Louis University School
of Medicine, St. Louis, Missouri 63104, United
States
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13
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Hammer N, Erickson JD, Lauridsen VH, Jakobsen JB, Hansen BK, Jacobsen KM, Poulsen TB, Jørgensen KA. Catalytic Asymmetric [4+2]‐Cycloadditions Using Tropolones: Developments, Scope, Transformations, and Bioactivity. Angew Chem Int Ed Engl 2018; 57:13216-13220. [DOI: 10.1002/anie.201808221] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Revised: 08/13/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Niels Hammer
- Department of ChemistryAarhus University 8000 Aarhus C Denmark
| | | | | | | | - Bente K. Hansen
- Department of ChemistryAarhus University 8000 Aarhus C Denmark
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14
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Hammer N, Erickson JD, Lauridsen VH, Jakobsen JB, Hansen BK, Jacobsen KM, Poulsen TB, Jørgensen KA. Catalytic Asymmetric [4+2]‐Cycloadditions Using Tropolones: Developments, Scope, Transformations, and Bioactivity. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Niels Hammer
- Department of ChemistryAarhus University 8000 Aarhus C Denmark
| | | | | | | | - Bente K. Hansen
- Department of ChemistryAarhus University 8000 Aarhus C Denmark
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15
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Hinokitiol inhibits compound action potentials in the frog sciatic nerve. Eur J Pharmacol 2018; 819:254-260. [DOI: 10.1016/j.ejphar.2017.12.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 11/29/2017] [Accepted: 12/06/2017] [Indexed: 11/19/2022]
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16
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Sato D, Kisen T, Kumagai M, Ohta K. Synthesis, structure-activity relationships, and mechanistic studies of 5-arylazo-tropolone derivatives as novel xanthine oxidase (XO) inhibitors. Bioorg Med Chem 2018; 26:536-542. [DOI: 10.1016/j.bmc.2017.12.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 12/08/2017] [Accepted: 12/10/2017] [Indexed: 12/17/2022]
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17
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Haas D, Sustac-Roman D, Schwarz S, Knochel P. Directed Zincation with TMPZnCl·LiCl and Further Functionalization of the Tropolone Scaffold. Org Lett 2016; 18:6380-6383. [DOI: 10.1021/acs.orglett.6b03270] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Diana Haas
- Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Daniela Sustac-Roman
- Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Sophia Schwarz
- Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstr. 5-13, 81377 Munich, Germany
| | - Paul Knochel
- Department of Chemistry, Ludwig-Maximilians-University Munich, Butenandtstr. 5-13, 81377 Munich, Germany
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18
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Yaremenko IA, Vil’ VA, Demchuk DV, Terent’ev AO. Rearrangements of organic peroxides and related processes. Beilstein J Org Chem 2016; 12:1647-748. [PMID: 27559418 PMCID: PMC4979652 DOI: 10.3762/bjoc.12.162] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Accepted: 07/14/2016] [Indexed: 12/17/2022] Open
Abstract
This review is the first to collate and summarize main data on named and unnamed rearrangement reactions of peroxides. It should be noted, that in the chemistry of peroxides two types of processes are considered under the term rearrangements. These are conventional rearrangements occurring with the retention of the molecular weight and transformations of one of the peroxide moieties after O-O-bond cleavage. Detailed information about the Baeyer-Villiger, Criegee, Hock, Kornblum-DeLaMare, Dakin, Elbs, Schenck, Smith, Wieland, and Story reactions is given. Unnamed rearrangements of organic peroxides and related processes are also analyzed. The rearrangements and related processes of important natural and synthetic peroxides are discussed separately.
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Affiliation(s)
- Ivan A Yaremenko
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Vera A Vil’
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Dmitry V Demchuk
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Alexander O Terent’ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
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Sayapin YA, Tupaeva IO, Kolodina AA, Gusakov EA, Komissarov VN, Dorogan IV, Makarova NI, Metelitsa AV, Tkachev VV, Aldoshin SM, Minkin VI. 2-Hetaryl-1,3-tropolones based on five-membered nitrogen heterocycles: synthesis, structure and properties. Beilstein J Org Chem 2015; 11:2179-88. [PMID: 26664640 PMCID: PMC4661002 DOI: 10.3762/bjoc.11.236] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 10/17/2015] [Indexed: 12/03/2022] Open
Abstract
A series of derivatives of 2-hetaryl-1,3-tropolone (β-tropolone) was prepared by the acid-catalyzed reaction of 2-methylbenzoxazoles, 2-methylbenzothiazoles and 2,3,3-trimethylindoline with 3,4,5,6-tetrachloro-1,2-benzoquinone. The molecular structures of the three representative compounds were determined by X-ray crystallography. In crystal and (as shown by the DFT PBE0/6-311+G** calculations) in solution, 2-hetaryl-4,5,6,7-tetrachloro- and 2-hetaryl-5,6,7-trichloro-1,3-tropolones exist in the NH-tautomeric form with a strong resonance-assisted intramolecular N–H···O hydrogen bond. The mechanism of the formation of 1,3-tropolones in the reaction of methylene-active five-membered heterocycles with o-chloranil in acetic acid solution has been studied using density functional theory (DFT) methods. The reaction of 2-(2-benzoxa(thia)zolyl)-5,6,7-trichloro(4,5,6,7-tetrachloro)-1,3-tropolones with alcohols leads to the contraction of the seven-membered tropone ring with the formation of 2-(2-benzoxa(thia)zolyl)-6-alkoxycarbonylphenols. The molecular structure of 2-(2-ethoxycarbonyl-6-hydroxy-3,4,5-trichlorophenyl)benzoxazole has been determined by X-ray diffraction. 2-(2-Benzoxa(thia)zolyl)-6-alkoxycarbonylphenols display intense green fluorescence with anomalous Stokes shifts caused by the excited state intramolecular proton transfer (ESIPT) effects.
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Affiliation(s)
- Yury A Sayapin
- Southern Scientific Center of Russian Academy of Sciences, 141 Chekhov St., 344006 Rostov on Don, Russian Federation ; Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Inna O Tupaeva
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Alexandra A Kolodina
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Eugeny A Gusakov
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Vitaly N Komissarov
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Igor V Dorogan
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Nadezhda I Makarova
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Anatoly V Metelitsa
- Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
| | - Valery V Tkachev
- Institute of Problems of Chemical Physics of Russian Academy of Sciences, 1 Akad. Semjonov N.N. Ave., 142432 Chernogolovka, Moscow region, Russian Federation
| | - Sergey M Aldoshin
- Institute of Problems of Chemical Physics of Russian Academy of Sciences, 1 Akad. Semjonov N.N. Ave., 142432 Chernogolovka, Moscow region, Russian Federation
| | - Vladimir I Minkin
- Southern Scientific Center of Russian Academy of Sciences, 141 Chekhov St., 344006 Rostov on Don, Russian Federation ; Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka St., 344090 Rostov on Don, Russian Federation
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21
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Gooyit M, Harris TL, Tricoche N, Javor S, Lustigman S, Janda KD. Onchocerca volvulus Molting Inhibitors Identified through Scaffold Hopping. ACS Infect Dis 2015; 1:198-202. [PMID: 27622649 DOI: 10.1021/acsinfecdis.5b00017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The anthelmintic closantel has shown promise in abrogating the L3 molting of Onchocerca volvulus, the causative agent of the infectious disease onchocerciasis. In our search for alternative scaffolds, we utilized a fragment replacement/modification approach to generate novel chemotypes with improved chitinase inhibitory properties. Further evaluation of the compounds unveiled the potential of urea-tropolones as potent inhibitors of O. volvulus L3 molting.
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Affiliation(s)
- Major Gooyit
- Departments
of Chemistry and Immunology and Microbial Science, The Skaggs Institute
for Chemical Biology, and The Worm Institute of Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Tyler L. Harris
- Departments
of Chemistry and Immunology and Microbial Science, The Skaggs Institute
for Chemical Biology, and The Worm Institute of Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Nancy Tricoche
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, New York 10065, United States
| | - Sacha Javor
- Departments
of Chemistry and Immunology and Microbial Science, The Skaggs Institute
for Chemical Biology, and The Worm Institute of Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Sara Lustigman
- Lindsley F. Kimball Research Institute, New York Blood Center, New York, New York 10065, United States
| | - Kim D. Janda
- Departments
of Chemistry and Immunology and Microbial Science, The Skaggs Institute
for Chemical Biology, and The Worm Institute of Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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22
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Mendiguchia BS, Aiello I, Crispini A. Zn(ii) and Cu(ii) complexes containing bioactive O,O-chelated ligands: homoleptic and heteroleptic metal-based biomolecules. Dalton Trans 2015; 44:9321-34. [DOI: 10.1039/c5dt00817d] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Zn(ii) or Cu(ii) highly stable complexes with chelated O,O-donor ligands from natural extractions give rise to drug delivery systems, new biologically active complexes and potential diagnostic agents due to their intrinsic spectroscopic properties.
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Affiliation(s)
- Barbara Sanz Mendiguchia
- MAT_INLAB (Laboratorio di Materiali Molecolari Inorganici)
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- 87036 Arcavacata di Rende
- Italy
| | - Iolinda Aiello
- MAT_INLAB (Laboratorio di Materiali Molecolari Inorganici)
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- 87036 Arcavacata di Rende
- Italy
| | - Alessandra Crispini
- MAT_INLAB (Laboratorio di Materiali Molecolari Inorganici)
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- 87036 Arcavacata di Rende
- Italy
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23
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Lyczko K, Lyczko M. Two polymorphs of 5-nitrotropolone. CRYSTALLOGR REP+ 2014. [DOI: 10.1134/s106377451407013x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Overy DP, Berrue F, Correa H, Hanif N, Hay K, Lanteigne M, Mquilian K, Duffy S, Boland P, Jagannathan R, Carr GS, Vansteeland M, Kerr RG. Sea foam as a source of fungal inoculum for the isolation of biologically active natural products. Mycology 2014; 5:130-144. [PMID: 25379337 PMCID: PMC4205912 DOI: 10.1080/21501203.2014.931893] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Accepted: 06/02/2014] [Indexed: 02/05/2023] Open
Abstract
Due to a rate increase in the resistance of microbial pathogens to currently used antibiotics, there is a need in society for the discovery of novel antimicrobials. Historically, fungi are a proven source for antimicrobial compounds. The main goals of this study were to investigate the fungal diversity associated with sea foam collected around the coast of Prince Edward Island and the utility of this resource for the production of antimicrobial natural products. Obtained isolates were identified using ITS and nLSU rDNA sequences, fermented on four media, extracted and fractions enriched in secondary metabolites were screened for antimicrobial activity. The majority of the isolates obtained were ascomycetes, consisting of four recognized marine taxa along with other ubiquitous genera and many 'unknown' isolates that could not be identified to the species level using rDNA gene sequences. Secondary metabolite isolation efforts lead to the purification of the metabolites epolones A and B, pycnidione and coniothyrione from a strain of Neosetophoma samarorum; brefeldin A, leptosin J and the metabolite TMC-264 from an unknown fungus (probably representative of an Edenia sp.); and 1-hydroxy-6-methyl-8-hydroxymethylxanthone, chrysophanol and chrysophanol bianthrone from a Phaeospheria spartinae isolate. The biological activity of each of these metabolites was assessed against a panel of microbial pathogens as well as several cell lines.
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Affiliation(s)
- David P Overy
- Nautilus Biosciences Canada Inc., Duffy Research Center , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3 ; Department of Chemistry, University of Prince Edward Island , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3 ; Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Fabrice Berrue
- Nautilus Biosciences Canada Inc., Duffy Research Center , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3 ; Department of Chemistry, University of Prince Edward Island , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Hebelin Correa
- Nautilus Biosciences Canada Inc., Duffy Research Center , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Novriyandi Hanif
- Department of Chemistry, University of Prince Edward Island , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Kathryn Hay
- Department of Biology, University of Prince Edward Island , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Martin Lanteigne
- Department of Chemistry, University of Prince Edward Island , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Kathrine Mquilian
- Nautilus Biosciences Canada Inc., Duffy Research Center , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Stephanie Duffy
- Nautilus Biosciences Canada Inc., Duffy Research Center , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Patricia Boland
- Department of Chemistry, University of Prince Edward Island , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Ramesh Jagannathan
- Nautilus Biosciences Canada Inc., Duffy Research Center , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Gavin S Carr
- Nautilus Biosciences Canada Inc., Duffy Research Center , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Marieke Vansteeland
- Nautilus Biosciences Canada Inc., Duffy Research Center , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
| | - Russell G Kerr
- Nautilus Biosciences Canada Inc., Duffy Research Center , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3 ; Department of Chemistry, University of Prince Edward Island , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3 ; Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island , 550 University Ave., Charlottetown , PEI , Canada C1A 4P3
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26
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Cordova-Kreylos AL, Fernandez LE, Koivunen M, Yang A, Flor-Weiler L, Marrone PG. Isolation and characterization of Burkholderia rinojensis sp. nov., a non-Burkholderia cepacia complex soil bacterium with insecticidal and miticidal activities. Appl Environ Microbiol 2013; 79:7669-78. [PMID: 24096416 PMCID: PMC3837800 DOI: 10.1128/aem.02365-13] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 09/14/2013] [Indexed: 02/05/2023] Open
Abstract
Isolate A396, a bacterium isolated from a Japanese soil sample demonstrated strong insecticidal and miticidal activities in laboratory bioassays. The isolate was characterized through biochemical methods, fatty acid methyl ester (FAME) analysis, sequencing of 16S rRNA, multilocus sequence typing and analysis, and DNA-DNA hybridization. FAME analysis matched A396 to Burkholderia cenocepacia, but this result was not confirmed by 16S rRNA or DNA-DNA hybridization. 16S rRNA sequencing indicated closest matches with B. glumae and B. plantarii. DNA-DNA hybridization experiments with B. plantarii, B. glumae, B. multivorans, and B. cenocepacia confirmed the low genetic similarity (11.5 to 37.4%) with known members of the genus. PCR-based screening showed that A396 lacks markers associated with members of the B. cepacia complex. Bioassay results indicated two mechanisms of action: through ingestion and contact. The isolate effectively controlled beet armyworms (Spodoptera exigua; BAW) and two-spotted spider mites (Tetranychus urticae; TSSM). In diet overlay bioassays with BAW, 1% to 4% (vol/vol) dilution of the whole-cell broth caused 97% to 100% mortality 4 days postexposure, and leaf disc treatment bioassays attained 75% ± 22% mortality 3 days postexposure. Contact bioassays led to 50% larval mortality, as well as discoloration, stunting, and failure to molt. TSSM mortality reached 93% in treated leaf discs. Activity was maintained in cell-free supernatants and after heat treatment (60°C for 2 h), indicating that a secondary metabolite or excreted thermostable enzyme might be responsible for the activity. Based on these results, we describe the novel species Burkholderia rinojensis, a good candidate for the development of a biocontrol product against insect and mite pests.
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Ito A, Muratake H, Shudo K. Deprotonation Equilibrium of 5-Tropolonediazonium Salt Strongly Favors 1,2,5-Tropoquinone-5-diazide Structure in Certain Solvents. J Org Chem 2013; 78:5470-5. [DOI: 10.1021/jo400593r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ai Ito
- Research Foundation Itsuu Laboratory, 2-28-10 Tamagawa, Setagaya-ku, Tokyo
158-0094, Japan
| | - Hideaki Muratake
- Research Foundation Itsuu Laboratory, 2-28-10 Tamagawa, Setagaya-ku, Tokyo
158-0094, Japan
| | - Koichi Shudo
- Research Foundation Itsuu Laboratory, 2-28-10 Tamagawa, Setagaya-ku, Tokyo
158-0094, Japan
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28
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Fullagar JL, Garner AL, Struss AK, Day JA, Martin DP, Yu J, Cai X, Janda KD, Cohen SM. Antagonism of a zinc metalloprotease using a unique metal-chelating scaffold: tropolones as inhibitors of P. aeruginosa elastase. Chem Commun (Camb) 2013; 49:3197-9. [PMID: 23482955 PMCID: PMC3618488 DOI: 10.1039/c3cc41191e] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tropolone emerged from the screening of a chelator fragment library (CFL) as an inhibitor of the Zn(2+)-dependent virulence factor, Pseudomonas aeruginosa elastase (LasB). Based on this initial hit, a series of substituted tropolone-based LasB inhibitors was prepared, and a compound displaying potent activity in vitro and in a bacterial swarming assay was identified. Importantly, this inhibitor was found to be specific for LasB over other metalloenzymes, validating the usage of tropolone as a viable scaffold for identifying first-in-class LasB inhibitors.
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Affiliation(s)
- Jessica L. Fullagar
- Departments of Chemistry and Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute for Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA;Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
| | - Amanda L. Garner
- Departments of Chemistry and Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute for Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA;Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
| | - Anjali K. Struss
- Departments of Chemistry and Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute for Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA;Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
| | - Joshua A. Day
- Departments of Chemistry and Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute for Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA;Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
| | - David P. Martin
- Departments of Chemistry and Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute for Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA;Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
| | - Jing Yu
- Departments of Chemistry and Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute for Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA;Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
| | - Xiaoqing Cai
- Departments of Chemistry and Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute for Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA;Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
| | - Kim D. Janda
- Departments of Chemistry and Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute for Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA;Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
| | - Seth M. Cohen
- Departments of Chemistry and Immunology and Microbial Science, The Skaggs Institute for Chemical Biology, The Worm Institute for Research and Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, USA;Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA, USA 92093
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Wang M, Hashimoto M, Hashidoko Y. Carot-4-en-9,10-diol, a conidiation-inducing sesquiterpene diol produced by Trichoderma virens PS1-7 upon exposure to chemical stress from highly active iron chelators. Appl Environ Microbiol 2013; 79:1906-14. [PMID: 23315728 PMCID: PMC3592238 DOI: 10.1128/aem.03531-12] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2012] [Accepted: 01/06/2013] [Indexed: 12/19/2022] Open
Abstract
To screen biocontrol agents against Burkholderia plantarii, the causative agent of rice seedling blight, we employed catechol, an analog of the virulence factor tropolone, to obtain chemical stress-resistant microorganisms. The fungal isolate PS1-7, identified as a strain of Trichoderma virens, showed the highest resistance to catechol (20 mM) and exhibited efficacy as a biocontrol agent for rice seedling blight. During investigation of metabolic traits of T. virens PS1-7 exposed to catechol, we found a secondary metabolite that was released extracellularly and uniquely accumulated in the culture. The compound induced by chemical stress due to catechol was subsequently isolated and identified as a sesquiterpene diol, carot-4-en-9,10-diol, based on spectroscopic analyses. T. virens PS1-7 produced carot-4-en-9,10-diol as a metabolic response to tropolone at concentrations from 0.05 to 0.2 mM, and the response was enhanced in a dose-dependent manner, similar to its response to catechol at concentrations from 0.1 to 1 mM. Some iron chelators, such as pyrogallol, gallic acid, salicylic acid, and citric acid, at 0.5 mM also showed activation of T. virens PS1-7 production of carot-4-en-9,10-diol. This sesquiterpene diol, formed in response to chemical stress, promoted conidiation of T. virens PS1-7, suggesting that it is involved in an autoregulatory signaling system. In a bioassay of the metabolic and morphological responses of T. virens PS1-7, conidiation in hyphae grown on potato dextrose agar (PDA) plates was either promoted or induced by carot-4-en-9,10-diol. Carot-4-en-9,10-diol can thus be regarded as an autoregulatory signal in T. virens, and our findings demonstrate that intrinsic intracellular signaling regulates conidiation of T. virens.
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30
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Sayapin YA, Gusakov EA, Bang ZN, Tupaeva IO, Komissarov VN, Dorogan IV, Tkachev VV, Aldoshin SM, Minkin VI. Synthesis and structure of 3-arylamino-2-(quinolin-2-yl)tropones. Russ Chem Bull 2013. [DOI: 10.1007/s11172-013-0067-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yeung J, Holinstat M. 12-lipoxygenase: a potential target for novel anti-platelet therapeutics. Cardiovasc Hematol Agents Med Chem 2012; 9:154-64. [PMID: 21838667 DOI: 10.2174/187152511797037619] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2011] [Accepted: 07/07/2011] [Indexed: 01/31/2023]
Abstract
Platelets play an essential role in the regulation of hemostasis and thrombosis and controlling their level of activation is central to prevention of occlusive clot formation and stroke. Although a number of anti-platelet targets have been identified to address this issue including COX-1, the P2Y(12) receptor, the integrin αIIbβ3, and more recently the protease-activated receptor-1, these targets often result in a significant increased risk of bleeding which may lead to pathologies as serious as the thrombosis they were meant to treat including intracranial hemorrhage and gastrointestinal bleeding. Therefore, alternative approaches to treat uncontrolled platelet activation are warranted. Platelet-type 12-lipoxygenase is an enzyme which oxidizes the free fatty acid in the platelet resulting in the production of the stable metabolite 12-hydroxyeicosatetraenoic acid (12-HETE). The role of 12-HETE in the platelet has been controversial with reports associating its function as being both anti- and pro-thrombotic. In this review, the role of 12-lipoxygenase and its bioactive metabolites in regulation of platelet reactivity, clot formation, and hemostasis is described. Understanding the mechanisms by which 12-lipoxygenase and its metabolites modulate platelet function may lead to the development of a novel class of anti-platelet therapies targeting the enzyme in order to attenuate injury-induced clot formation, vessel occlusion and pathophysiological shifts in hemostasis.
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Affiliation(s)
- Jennifer Yeung
- Department of Medicine, Cardeza Foundation for Hematologic Research, Thomas Jefferson University, Philadelphia, PA, USA
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Oh I, Yang WY, Park J, Lee S, Mar W, Oh KB, Shin J. In vitro Na+/K+-ATPase inhibitory activity and antimicrobial activity of sesquiterpenes isolated from Thujopsis dolabrata. Arch Pharm Res 2011; 34:2141-7. [PMID: 22210041 DOI: 10.1007/s12272-011-1218-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 06/27/2011] [Accepted: 07/11/2011] [Indexed: 10/14/2022]
Abstract
A series of sesquiterpenes and hinokitiol-related compounds (1-15) was isolated from the essential oil of Thujopsis dolabrata Sieb. et Zucc. var. hondai Makino, and their structures were determined by combined spectroscopic analyses. The inhibitory effects of these compounds on microbial cell growth and Na(+)/K(+)-ATPase were evaluated in vitro. It was found that (-)-elema-1,3,11(13)-trien-12-ol (5), α,β,γ-costol (8), and chamigrenol (11) inhibit the activities of Na(+)/K(+)-ATPase, with IC(50) values of 11.2 ± 0.11, 12.2 ± 0.09, and 15.9 ± 0.54 μg/mL, respectively. Thujopsene (1), cedrol (9), γ-cuparenol (10), and chamigrenol (11) showed potent antibacterial activity, with MIC values in the range of 25-50 μg/mL, and β-thujaplicin (12) exhibited a broad spectrum of antibacterial and antifungal activity. These results indicate that these isolated compounds are promising candidates for the development of potent Na(+)/K(+) ATPase inhibitors and antimicrobial agents.
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Affiliation(s)
- Ikhoon Oh
- College of Pharmacy, Seoul National University, Seoul, 151-742, Korea
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Ho DM, Zdilla MJ. trans-Bis(hinokitiolato)copper(II) trans-bis(hinokitiolato)palladium(II) cocrystals with (5/1) and (3/2) formulations. Acta Crystallogr C 2011; 67:m100-4. [DOI: 10.1107/s0108270111007372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Accepted: 02/26/2011] [Indexed: 11/10/2022] Open
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Lee SH. Platform Technologies for Research on the G Protein Coupled Receptor: Applications to Drug Discovery Research. Biomol Ther (Seoul) 2011. [DOI: 10.4062/biomolther.2011.19.1.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Nam KW, Noh JK, Kim SK, Lee SJ, Kim KH, Oh KB, Shin JH, Mar WC. Essential Oil of Thujopsis dolobrata Suppresses Atopic Dermatitis-Like Skin Lesions in NC/Nga Mice. Biomol Ther (Seoul) 2011. [DOI: 10.4062/biomolther.2011.19.1.102] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Parajón-Costa BS, Baran EJ, Romero J, Sáez-Puche R, Arrambide G, Gambino D. Synthesis and characterization of bistropolonato oxovanadium(IV and V) complexes. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.531131] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Beatriz S. Parajón-Costa
- a Centro de Química Inorgánica (CEQUINOR/CONICET,UNLP), Facultad de Ciencias Exactas , Universidad Nacional de La Plata , C. Correo 962, 1900-La Plata , Argentina
| | - Enrique J. Baran
- a Centro de Química Inorgánica (CEQUINOR/CONICET,UNLP), Facultad de Ciencias Exactas , Universidad Nacional de La Plata , C. Correo 962, 1900-La Plata , Argentina
| | - Julio Romero
- b Departamento de Química Inorgánica, Facultad de Ciencias Químicas , Universidad Complutense de Madrid , E-28040 Madrid , Spain
| | - Regino Sáez-Puche
- b Departamento de Química Inorgánica, Facultad de Ciencias Químicas , Universidad Complutense de Madrid , E-28040 Madrid , Spain
| | - Gabriel Arrambide
- c Departamento “Estrella Campos”, Cátedra de Química Inorgánica, Facultad de Química , Universidad de la República , Montevideo , Uruguay
| | - Dinorah Gambino
- c Departamento “Estrella Campos”, Cátedra de Química Inorgánica, Facultad de Química , Universidad de la República , Montevideo , Uruguay
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In vitro and in vivo antimalarial activity of puberulic acid and its new analogs, viticolins A-C, produced by Penicillium sp. FKI-4410. J Antibiot (Tokyo) 2010; 64:183-8. [PMID: 21063422 DOI: 10.1038/ja.2010.124] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In the course of screening for antimalarial agents, five tropolone compounds were isolated from the culture broth of Penicillium sp. FKI-4410. Two were known compounds, puberulic acid and stipitatic acid. Three were new analogs of puberulic acid, designated viticolins A-C. Among them, puberulic acid exhibited potent antimalarial inhibition, with IC(50) values of 0.01 μg ml(-1) against chloroquine-sensitive and -resistant Plasmodium falciparum strains in vitro. Furthermore, puberulic acid showed weak cytotoxicity against human MRC-5 cells, with an IC(50) value of 57.2 μg ml(-1). The compound also demonstrated a therapeutic effect in vivo, which compared well against the currently used antimalarial drugs, and thus shows promise as a leading candidate for development into a new antimalarial compound.
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Ho DM. A urea adduct of bis(hinokitiolato)copper(II). Acta Crystallogr C 2010; 66:m294-9. [PMID: 20921607 DOI: 10.1107/s0108270110035602] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2010] [Accepted: 09/04/2010] [Indexed: 11/11/2022] Open
Abstract
Bis(μ(2)-3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olato)bis[(3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olato)copper(II)]-urea-acetone (1/6/2), [Cu(2)(C(10)H(11)O(2))(4)]·6CH(4)N(2)O·2C(3)H(6)O, where 3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olate is the systematic name for the hinokitiolate anion, contains three novel structural features. First, it contains a bis(hinokitiolato)copper(II) dimer, [Cu(hino)(2)](2), unlike any other, demonstrating that linkage isomerism is another avenue by which Cu(hino)(2) can transmute from one form to another. Second, [Cu(hino)(2)](2) is hydrogen bonded to two urea molecules, indicating that hydrogen bonding cannot yet be discounted from any proposed mechanism of action for the antimicrobial and antiviral properties of bis(hinokitiolato)copper(II). Finally, corrugated urea layers crosslinked by [Cu(hino)(2)](2) dimers are observed, suggesting that a new family of host-guest materials, i.e. metallo-urea clathrates, exists to challenge our understanding of crystal engineering and crystal growth and design. Selected details of the structure are that the [Cu(hino)(2)](2) dimers possess crystallographic inversion symmetry, the Cu atoms have square-pyramidal coordination geometries, the basal Cu-O bonds are in the range 1.916 (2)-1.931 (2) Å, the apical Cu-O bond length is 2.582 (2) Å, the hinokitiolate bite angles are in the range 83.41 (7)-83.96 (8)°, the urea-Cu(hino)(2) interactions have an R(2)(2)(8) motif, and the urea layers result from the close packing of R(8)(6)(28) 'butterflies' and R(8)(6)(24) 'strips of tape'.
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Affiliation(s)
- Douglas M Ho
- Princeton University, Department of Chemistry, Princeton, NJ 08544-1009, USA.
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Gao W, Sun M, Li Y. Synthesis and Reactions of Halo-, Arylazo-substituted 3-(3-(1-naphthyl)acryloyl)tropolones. Formation of (Naphthalen-1-yl)vinyl)substituted Heterocycle-fused Troponoid Compounds. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090241] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ho DM. Bis(hinokitiolato)copper(II): modification (III). Acta Crystallogr C 2010; 66:m145-8. [PMID: 20522935 DOI: 10.1107/s0108270110015581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Accepted: 04/27/2010] [Indexed: 11/10/2022] Open
Abstract
Bis(hinokitiolato)copper(II), Cu(hino)(2), exhibits both antibacterial and antiviral properties, and has been previously shown to exist in two modifications. A third modification has now been confirmed, namely tetrakis(mu(2)-3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olato)bis(3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olato)tricopper(II)-bis(mu(2)-3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olato)bis[(3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olato)copper(II)] (1/1), [Cu(C(10)H(11)O(2))(2)](3).[Cu(C(10)H(11)O(2))(2)](2), where 3-isopropyl-7-oxocyclohepta-1,3,5-trien-1-olate is the systematic name for the hinokitiolate anion. This new modification is composed of discrete [cis-Cu(hino)(2)](2)[trans-Cu(hino)(2)] trimers and [cis-Cu(hino)(2)](2) dimers. The Cu atoms are bridged by mu(2)-O atoms from the hinokitiolate ligands to give distorted square-pyramidal and distorted octahedral Cu(II) coordination environments. Hence, the Cu(II) environments are CuO(5)/CuO(6)/CuO(5) for the trimer and CuO(5)/CuO(5) for the dimer. Each trimer and dimer has crystallographically imposed inversion symmetry. The trimer has never been observed before, the dimer has been seen only once before, and the combination of the two together in the same lattice is unprecedented. The CuO(5) cores exhibit four strong basal Cu-O bonds [1.915 (2)-1.931 (2) A] and one weak apical Cu-O bond [2.652 (2)-2.658 (2) A]. The CuO(6) core exhibits four strong equatorial Cu-O bonds [1.922 (2)-1.929 (2) A] and two very weak axial Cu-O bonds [2.911 (3) A]. The bite angles for the chelating hinokitiolate ligands range from 83.13 (11) to 83.90 (10) degrees .
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Affiliation(s)
- Douglas M Ho
- Department of Chemistry, Princeton University, Princeton, NJ 08544-1009, USA.
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Fernández D, Pallarès I, Vendrell J, Avilés FX. Progress in metallocarboxypeptidases and their small molecular weight inhibitors. Biochimie 2010; 92:1484-500. [PMID: 20466032 DOI: 10.1016/j.biochi.2010.05.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2010] [Accepted: 05/04/2010] [Indexed: 01/11/2023]
Abstract
In what corresponds to a life span, metallocarboxypeptidases (MCPs) have jumped from being mere contaminants in animal pancreas powders (in depression year 1929) to be key players in cellular and molecular processes (in yet-another-depression years 2009-2010). MCPs are unique zinc-dependent enzymes that catalyze the breakdown of the amide bond at the C-terminus of peptide and protein substrates and participate in the recovery of dietary amino acids, tissue organogenesis, neurohormone and cytokine maturation and other important physiological processes. More than 26 genes code for MCPs in the human genome, many of them still waiting to be fully understood in terms of physiological function. A variety of MCPs have been linked to diseases in man: acute pancreatitis and pancreas cancer, type 2 diabetes, Alzheimer's Disease, various types of cancer, and fibrinolysis and inflammation. Many of these discoveries have been made possible thanks to recent advances, as exemplified by plasma carboxypeptidases N and B, known for fifty and twenty years, respectively, which have had their structures released only very recently. Plasma carboxypeptidase B is a biological target for therapy because of its involvement in the coagulation/fibrinolysis processes. Besides, the widespread use of carboxypeptidase A as a benchmark metalloprotease since the early days of Biochemistry has allowed the identification and design of an increasingly vast repertory of small molecular weight inhibitors. With these two examples we wish to emphasize that MCPs have become part of the drug discovery portfolio of pharmaceutical companies and academic research laboratories. This paper will review key developments in the discovery and design of MCP small molecular weight inhibitors, with an emphasis on the discovery of chemically diverse entities. Although encouraging advances have been achieved in the last few years, the specificity and oral bioavailability of the new chemotherapeutic agents seem to pose a challenge to medicinal chemists.
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Affiliation(s)
- Daniel Fernández
- Departament de Bioquímica i Biologia Molecular, Facultat de Biociències and Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
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Ito A, Muratake H, Shudo K. Novel Synthesis of Ureas: Application of t-Butylureas. Chem Pharm Bull (Tokyo) 2010; 58:82-6. [DOI: 10.1248/cpb.58.82] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Ai Ito
- Research Foundation Itsuu Laboratory
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Gao W, Sun M, Li Y, Li W, Imafuku K. Syntheses and reactions of halo- and arylazo-substituted 3-(3-(2-naphthyl)acryloyl)tropolones: Formation of (naphthalen- 2-yl)vinyl)-substituted heterocycle-fused troponoid compounds. J Heterocycl Chem 2009. [DOI: 10.1002/jhet.243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Syntheses, structures and antimicrobial activities of various metal complexes of hinokitiol. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.02.061] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Pucci D, Bellusci A, Bernardini S, Bloise R, Crispini A, Federici G, Liguori P, Lucas MF, Russo N, Valentini A. Bioactive fragments synergically involved in the design of new generation Pt(ii) and Pd(ii)-based anticancer compounds. Dalton Trans 2008:5897-904. [PMID: 19082045 DOI: 10.1039/b808093c] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New Pt(ii) and Pd(ii) complexes with the metal center coordinated to two different chelating ligands, tropolone (trop) and dihexadecyl-2,2'-bipyridine-4,4'-dicarboxylate bipyridine (bipy), [(bipy)M(trop)][CF(3)SO(3)], have been synthesized and their biological evaluation has been performed demonstrating a remarkable cytotoxic activity in vitro against the human prostate DU145 and hormone-sensitive LNCaP cells lines. Moreover, for the Pt(ii) derivative, the molecular structure has been determined by single-crystal X-ray diffraction and computational analysis on the hydrolysis reaction mechanisms have been performed by density functional theory (DFT) calculations, in order to correlate molecular structure, biological activity and mechanism of action of this new class of complexes based on two different bioactive fragments.
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Affiliation(s)
- Daniela Pucci
- Centro di Eccellenza CEMIF, CAL-LASCAMM, Unità INSTM della Calabria, Dipartimento di Chimica Università della Calabria, 87030, Arcavacata di Rende (CS), Italy.
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Yen TB, Chang HT, Hsieh CC, Chang ST. Antifungal properties of ethanolic extract and its active compounds from Calocedrus macrolepis var. formosana (Florin) heartwood. BIORESOURCE TECHNOLOGY 2008; 99:4871-4877. [PMID: 17977717 DOI: 10.1016/j.biortech.2007.09.037] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2007] [Revised: 09/12/2007] [Accepted: 09/15/2007] [Indexed: 05/25/2023]
Abstract
The ethanolic extract of Calocedrus macrolepis var. formosana heartwood was screened for antifungal compounds by agar dilution assay and liquid chromatography. Two compounds, beta-thujaplicin and gamma-thujaplicin, responsible for the antifungal property of C. macrolepis var. formosana heartwood were isolated by high performance liquid chromatography (HPLC), and identified by 1H NMR and 13C NMR. The antifungal activities of these two compounds were further evaluated against total 15 fungi, including wood decay fungi, tree pathogenic fungi and molds. The hexane soluble fraction showed the strongest antifungal activities among all fractions. beta-Thujaplicin and gamma-thujaplicin exhibited not only very strong antifungal activity, but also broad antifungal spectrum. The MIC values of beta-thujaplicin and gamma-thujaplicin were in the range of 5.0-50.0 microg/ml. In addition, scanning electron microscopy (SEM) was carried out to study the structural change of fungal hyphae induced by beta-thujaplicin. Strong cell wall shrinkage indicated the fungicidal effect could be attributed to the combined actions of metal chelating and cytoplasm leakage. It also suggests that the role of metal chelating is indispensable in the design of environmental-friendly fungicides.
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Affiliation(s)
- Tsair-Bor Yen
- Department of Tropical Agriculture and International Cooperation, National Pingtung University of Science and Technology, Pingtung 912, Taiwan, ROC
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Komaki N, Watanabe T, Ogasawara A, Sato N, Mikami T, Matsumoto T. Antifungal mechanism of hinokitiol against Candida albicans. Biol Pharm Bull 2008; 31:735-7. [PMID: 18379073 DOI: 10.1248/bpb.31.735] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The growth of Candida albicans was dose-dependently inhibited by addition of hinokitiol. The sensitivity of C. albicans to hinokitiol under aerobic conditions was higher than that under anaerobic conditions. Amount of ATP in C. albicans was not inhibited by hinokitiol under both conditions. The expression of mRNAs related to the growth signal, CYR1 and RAS1, was inhibited by hinokitiol. These findings suggested that the growth inhibition of C. albicans by hinokitiol was due to the interruption of RAS-signal transmission, such as the cAMP pathway.
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Affiliation(s)
- Nami Komaki
- Department of Microbiology, Tohoku Pharmaceutical University, 4-4-1 Komatsushima, Aoba-ku, Sendai 981-8558, Japan
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Montaña Á, Barcia J, Kociok-Köhn G, Font-Bardia M, Solans X. Synthesis of 3-Aminotropones fromN-Boc-Protected Furan-2-amine (=tert-Butyl Furan-2-ylcarbamate; Boc=(tert-Butoxy)carbonyl) by Cycloaddition Reactions and Subsequent Rearrangement. Helv Chim Acta 2008. [DOI: 10.1002/hlca.200890024] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Photodynamic Inactivation of Staphylococcus auerus by Novel Troponyl Methyl (Pyro)pheophorbides. B KOREAN CHEM SOC 2008. [DOI: 10.5012/bkcs.2008.29.1.237] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Genetic dissection of tropodithietic acid biosynthesis by marine roseobacters. Appl Environ Microbiol 2008; 74:1535-45. [PMID: 18192410 DOI: 10.1128/aem.02339-07] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The symbiotic association between the roseobacter Silicibacter sp. strain TM1040 and the dinoflagellate Pfiesteria piscicida involves bacterial chemotaxis to dinoflagellate-produced dimethylsulfoniopropionate (DMSP), DMSP demethylation, and ultimately a biofilm on the surface of the host. Biofilm formation is coincident with the production of an antibiotic and a yellow-brown pigment. In this report, we demonstrate that the antibiotic is a sulfur-containing compound, tropodithietic acid (TDA). Using random transposon insertion mutagenesis, 12 genes were identified as critical for TDA biosynthesis by the bacteria, and mutation in any one of these results in a loss of antibiotic activity (Tda(-)) and pigment production. Unexpectedly, six of the genes, referred to as tdaA-F, could not be found on the annotated TM1040 genome and were instead located on a previously unidentified plasmid (ca. 130 kb; pSTM3) that exhibited a low frequency of spontaneous loss. Homologs of tdaA and tdaB from Silicibacter sp. strain TM1040 were identified by mutagenesis in another TDA-producing roseobacter, Phaeobacter sp. strain 27-4, which also possesses two large plasmids (ca. 60 and ca. 70 kb, respectively), and tda genes were found by DNA-DNA hybridization in 88% of a diverse collection of nine roseobacters with known antibiotic activity. These data suggest that roseobacters may use a common pathway for TDA biosynthesis that involves plasmid-encoded proteins. Using metagenomic library databases and a bioinformatics approach, differences in the biogeographical distribution between the critical TDA synthesis genes were observed. The implications of these results to roseobacter survival and the interaction between TM1040 and its dinoflagellate host are discussed.
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