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Mollova-Sapundzhieva Y, Angelov P, Georgiev D, Yanev P. Synthetic approach to 2-alkyl- 4-quinolones and 2-alkyl-4-quinolone-3-carboxamides based on common β-keto amide precursors. Beilstein J Org Chem 2023; 19:1804-1810. [PMID: 38033452 PMCID: PMC10682542 DOI: 10.3762/bjoc.19.132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Accepted: 11/16/2023] [Indexed: 12/02/2023] Open
Abstract
β-Keto amides were used as convenient precursors to both 2-alkyl-4-quinolones and 2-alkyl-4-quinolone-3-carboxamides. The utility of this approach is demonstrated with the synthesis of fourteen novel and four known quinolone derivatives, including natural products of microbial origin such as HHQ and its C5-congener. Two compounds with high activity against S. aureus have been identified among the newly obtained quinolones, with MICs ≤ 3.12 and ≤ 6.25 µg/mL, respectively.
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Affiliation(s)
- Yordanka Mollova-Sapundzhieva
- Department of Organic Chemistry, University of Plovdiv Paisii Hilendarski, 24 Tsar Asen Str., 4000 Plovdiv, Bulgaria
| | - Plamen Angelov
- Department of Organic Chemistry, University of Plovdiv Paisii Hilendarski, 24 Tsar Asen Str., 4000 Plovdiv, Bulgaria
| | - Danail Georgiev
- Department of Biochemistry and Microbiology, University of Plovdiv Paisii Hilendarski, 24 Tsar Asen Str., 4000 Plovdiv, Bulgaria
| | - Pavel Yanev
- Department of Organic Chemistry, University of Plovdiv Paisii Hilendarski, 24 Tsar Asen Str., 4000 Plovdiv, Bulgaria
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Shahid I, Han J, Hardie D, Baig DN, Malik KA, Borchers CH, Mehnaz S. Profiling of antimicrobial metabolites of plant growth promoting Pseudomonas spp. isolated from different plant hosts. 3 Biotech 2021; 11:48. [PMID: 33489669 DOI: 10.1007/s13205-020-02585-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 12/03/2020] [Indexed: 01/25/2023] Open
Abstract
In this study, nine strains of Pseudomonas au rantiaca and P. chlororaphis, and two isolates of Pseudomonas sp.: At1RP4 and RS-1, were characterized for the in-vitro production of secondary metabolites in LB, DMB, and King's B media, and of the genes responsible for the production of antagonistic metabolites. Based on 16S rRNA gene sequence, isolates At1RP4 and RS-1 were identified as strains of P. aeruginosa and P. fluorescens. Five phenazine derivatives comprising phenazine, phenazine-1-carboxylic acid (PCA), 2-hydroxyphenazine-1-carboxylic acid (2-OH-Phz-1-COOH), phenazine-1,6-dicarboxylic acid (Phz-1,6-di-COOH), and 2-hydroxyphenazine (2-OH-Phz) were produced by all strains in all three culture media including DMB, King's B and LB. However, 2,8-dihydroxyphenazine, 6-methylphenazine-1-carboxylic acid, pyrrolnitrin, and the ortho-dialkyl-aromatic acids, were produced by the P. aurantiaca and P. chlororaphis strains. In addition, all strains produced 2-acetamidophenol, pyochelin, and diketopiperazine derivatives in variable amounts in all three culture media used. Highest levels of quorum-sensing signal molecules including PQS, 2-Octyl-3-hydroxy-4(1H)-quinolone, and hexahydro-quinoxaline-1,4-dioxide were recorded for P. aeruginosa At1RP4. Moreover, all strains produced volatile hydrogen cyanide (0.95-6.68 µg/L) and the phytohormone indole-3-acetic acid (0.42-13.9 µM). Production of extracellular lipase and protease was recorded in all pseudomonads, whereas, cellulase production and phosphate solubilization were variable. Genes for hydrogen cyanide and phenazine-1-carboxylic acid were detected in all eleven strains while the gene for pyrrolnitrin biosynthesis was amplified in P. aurantiaca and P. chlororaphis strains. Comparative metabolomic analysis provided detailed insights about the strain-specific metabolites in pseudomonads, and their pseudo-relative quantification in different bacterial growth media to be used as single-strain biofertilizer and biocontrol inoculums. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-020-02585-8.
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Guzman JD, Wube A, Evangelopoulos D, Gupta A, Hüfner A, Basavannacharya C, Rahman MM, Thomaschitz C, Bauer R, McHugh TD, Nobeli I, Prieto JM, Gibbons S, Bucar F, Bhakta S. Interaction of N-methyl-2-alkenyl- 4-quinolones with ATP-dependent MurE ligase of Mycobacterium tuberculosis: antibacterial activity, molecular docking and inhibition kinetics. J Antimicrob Chemother 2011; 66:1766-72. [PMID: 21622974 PMCID: PMC3133487 DOI: 10.1093/jac/dkr203] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 04/18/2011] [Accepted: 04/27/2011] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVES The aim of this study was to comprehensively evaluate the antibacterial activity and MurE inhibition of a set of N-methyl-2-alkenyl-4-quinolones found to inhibit the growth of fast-growing mycobacteria. METHODS Using the spot culture growth inhibition assay, MICs were determined for Mycobacterium tuberculosis H(37)Rv, Mycobacterium bovis BCG and Mycobacterium smegmatis mc(2)155. MICs were determined for Mycobacterium fortuitum, Mycobacterium phlei, methicillin-resistant Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa using microplate dilution assays. Inhibition of M. tuberculosis MurE ligase activity was determined both by colorimetric and HPLC methods. Computational modelling and binding prediction of the quinolones in the MurE structure was performed using Glide. Kinetic experiments were conducted for understanding possible competitive relations of the quinolones with the endogenous substrates of MurE ligase. RESULTS The novel synthetic N-methyl-2-alkenyl-4-quinolones were found to be growth inhibitors of M. tuberculosis and rapid-growing mycobacteria as well as methicillin-resistant S. aureus, while showing no inhibition for E. coli and P. aeruginosa. The quinolones were found to be inhibitory to MurE ligase of M. tuberculosis in the micromolar range (IC(50) ∼40-200 μM) when assayed either spectroscopically or by HPLC. Computational docking of the quinolones on the published M. tuberculosis MurE crystal structure suggested that the uracil recognition site is a probable binding site for the quinolones. CONCLUSIONS N-methyl-2-alkenyl-4-quinolones are inhibitors of mycobacterial and staphylococcal growth, and show MurE ligase inhibition. Therefore, they are considered as a starting point for the development of increased affinity MurE activity disruptors.
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Affiliation(s)
- Juan David Guzman
- Department of Biological Sciences, Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK
- Department of Pharmaceutical and Biological Chemistry, The School of Pharmacy, University of London, 29–39 Brunswick Square, London WC1N 1AX, UK
| | - Abraham Wube
- Department of Pharmacognosy, Institute of Pharmaceutical Sciences, Karl Franzens University Graz, Universitätsplatz 4, A-8010 Graz, Austria
| | - Dimitrios Evangelopoulos
- Department of Biological Sciences, Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK
- Department of Medical Microbiology, Royal Free Hospital, University College London, Rowland Hill Street, London NW3 2PF, UK
| | - Antima Gupta
- Department of Biological Sciences, Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK
| | - Antje Hüfner
- Department of Pharmaceutical Chemistry, Institute of Pharmaceutical Sciences, Karl Franzens University Graz, Universitätsplatz 1, A-8010 Graz, Austria
| | - Chandrakala Basavannacharya
- Department of Biological Sciences, Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK
| | - Md. Mukhleshur Rahman
- Department of Pharmaceutical and Biological Chemistry, The School of Pharmacy, University of London, 29–39 Brunswick Square, London WC1N 1AX, UK
| | - Christina Thomaschitz
- Department of Pharmacognosy, Institute of Pharmaceutical Sciences, Karl Franzens University Graz, Universitätsplatz 4, A-8010 Graz, Austria
| | - Rudolf Bauer
- Department of Pharmacognosy, Institute of Pharmaceutical Sciences, Karl Franzens University Graz, Universitätsplatz 4, A-8010 Graz, Austria
| | - Timothy Daniel McHugh
- Department of Medical Microbiology, Royal Free Hospital, University College London, Rowland Hill Street, London NW3 2PF, UK
| | - Irene Nobeli
- Department of Biological Sciences, Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK
| | - Jose M. Prieto
- Department of Pharmaceutical and Biological Chemistry, The School of Pharmacy, University of London, 29–39 Brunswick Square, London WC1N 1AX, UK
| | - Simon Gibbons
- Department of Pharmaceutical and Biological Chemistry, The School of Pharmacy, University of London, 29–39 Brunswick Square, London WC1N 1AX, UK
| | - Franz Bucar
- Department of Pharmacognosy, Institute of Pharmaceutical Sciences, Karl Franzens University Graz, Universitätsplatz 4, A-8010 Graz, Austria
| | - Sanjib Bhakta
- Department of Biological Sciences, Institute of Structural and Molecular Biology, Birkbeck College, University of London, Malet Street, London WC1E 7HX, UK
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