1
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Kang MS, Jang SC, Park T, Kim MS, Park JS, Chi WJ, Kim SY. Synthesis and Melanogenesis Effect of 7,8-Dimethoxy-4-Methylcoumarin via MAPK Signaling-Mediated Microphthalmia-Associated Transcription Factor Upregulation. Nat Prod Commun 2022. [DOI: 10.1177/1934578x221076647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Tyrosinase ultimately controls the melanogenesis rate of the skin, and tanning and haircare products generally induce the activation of tyrosinase. Moreover, various enzymes, including tyrosinase, tyrosinase-related protein 1 (TRP1), and tyrosinase-related protein 2 (TRP2), mediate melanogenesis in which microphthalmia-associated transcription factor (MITF) is a master regulator. One coumarin family member 7,8-dihydroxy-4-methylcoumarin (DHMC) shows extensive biological activities with beneficial health effects; however, it also induces cytotoxicity and its melanogenic effect has not been reported yet. Therefore, we first synthesized DHMC derivatives via methylation to obtain 7,8-dimethoxy-4-methylcoumairn (DMMC), and investigated the pro- or anti-melanogenic effects of DHMC and DMMC in B16-F10 melanoma cells as well as the underlying mechanism. DHMC showed cytotoxicity at all tested concentrations, whereas DMMC did not reduce cell viability, even at the high concentration. DMMC also drives the significant increase in intracellular melanin and tyrosinase activity. Moreover, DMMC induced MITF expression by significantly increasing tyrosinase activity, which activates the gene expression of TRP1 and TRP2. Western blotting confirmed that DMMC induced the activation of mitogen-activated protein kinase (MAPK) signaling by the phosphorylation of C-Jun N-terminal kinase (JNK), resulting in the increased melanin production and the decreased phosphorylation of protein kinase B. Collectively, this study showed the pro-melanogenic effect of DMMC and its potential as a safe tanning and dyeing agent.
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Affiliation(s)
| | | | - Taejin Park
- Sunmoon University, Chungnam, Republic of Korea
| | - Min-Seon Kim
- Korea Institute of Science and Technology (KIST), Gangwon-do, Republic of Korea
| | - Jin-Soo Park
- Korea Institute of Science and Technology (KIST), Gangwon-do, Republic of Korea
| | - Won-Jae Chi
- National Institute of Biological Resources, Incheon, Republic of South Korea
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2
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Dkhar L, Verma AK, Banothu V, Kaminsky W, Kollipara MR. Ruthenium, rhodium, and iridium complexes featuring coumarin hydrazone derivatives: Synthesis, characterization, and preliminary investigation of their anticancer and antibacterial activity. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Lincoln Dkhar
- Centre for Advanced Studies in Chemistry North‐Eastern Hill University Shillong India
| | - Akalesh Kumar Verma
- Department of Zoology, Cell & Biochemical Technology Laboratory Cotton University Guwahati Assam India
| | - Venkanna Banothu
- Centre for Biotechnology (CBT), Institute of Science and Technology (IST) Jawaharlal Nehru Technological University Hyderabad (JNTUH) Hyderabad Telangana State India
| | - Werner Kaminsky
- Department of Chemistry University of Washington Seattle Washington USA
| | - Mohan Rao Kollipara
- Centre for Advanced Studies in Chemistry North‐Eastern Hill University Shillong India
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3
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GyrB inhibitors as potential antibacterial agents: a review. MONATSHEFTE FUR CHEMIE 2021. [DOI: 10.1007/s00706-021-02800-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Wu J, Mu R, Sun M, Zhao N, Pan M, Li H, Dong Y, Sun Z, Bai J, Hu M, Nathan CF, Javid B, Liu G. Derivatives of Natural Product Agrimophol as Disruptors of Intrabacterial pH Homeostasis in Mycobacterium tuberculosis. ACS Infect Dis 2019; 5:1087-1104. [PMID: 31016962 DOI: 10.1021/acsinfecdis.8b00325] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This article reports the rational medicinal chemistry of a natural product, agrimophol (1), as a new disruptor of intrabacterial pH (pHIB) homeostasis in Mycobacterium tuberculosis (Mtb). Through the systematic investigation of the structure-activity relationship of 1, scaffold-hopping of the diphenylmethane scaffold, pharmacophore displacement strategies, and studies of the structure-metabolism relationship, a new derivative 5a was achieved. Compound 5a showed 100-fold increased potency in the ability to reduce pHIB to pH 6.0 and similarly improved mycobactericidal activity compared with 1 against both Mycobacterium bovis-BCG and Mtb. Compound 5a possessed improved metabolic stability in human liver microsomes and hepatocytes, lower cytotoxicity, higher selectivity index, and similar pKa value to natural 1. This study introduces a novel scaffold to an old drug, resulting in improved mycobactericidal activity through decreasing pHIB, and may contribute to the critical search for new agents to overcome drug resistance and persistence in the treatment of tuberculosis.
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Affiliation(s)
- Jie Wu
- Tsinghua-Peking Center for Life Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
| | - Ran Mu
- School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
| | - Mingna Sun
- School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
| | - Nan Zhao
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York 10065, United States
| | - Miaomiao Pan
- Centre for Global Health and Infectious Diseases, Collaborative Innovation Centre for the Diagnosis and Treatment of Infectious Diseases, Tsinghua University School of Medicine, Beijing 100084, China
| | - Hongshuang Li
- School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
| | - Yi Dong
- School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
| | - Zhaogang Sun
- National Tuberculosis Clinical Laboratory, Beijing Chest Hospital, Capital Medical University and Beijing Key Laboratory in Drug Resistant Tuberculosis Research, Beijing Tuberculosis & Thoracic Tumor Research Institute, 9 Beiguan Street, Tongzhou District, Beijing 101149, China
| | - Jie Bai
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, China
| | - Minwan Hu
- Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, China
| | - Carl F. Nathan
- Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York 10065, United States
| | - Babak Javid
- Centre for Global Health and Infectious Diseases, Collaborative Innovation Centre for the Diagnosis and Treatment of Infectious Diseases, Tsinghua University School of Medicine, Beijing 100084, China
| | - Gang Liu
- Tsinghua-Peking Center for Life Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
- School of Pharmaceutical Sciences, Tsinghua University, Renhuan Building, Rm 311, Haidian District, Beijing 100084, P. R. China
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5
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Li X, Chen X, Yuan J, Liu Y, Li P, Qu L, Zhao Y. An Efficient Synthesis of 1,2,3-Triazole Bridge-Connected Phosphonate Derivatives of Coumarin. PHOSPHORUS SULFUR 2015. [DOI: 10.1080/10426507.2014.979987] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Xu Li
- Department of Chemistry, Zhengzhou University, Key Laboratory of Organic Chemistry and Chemical Biology, Henan Province, Zhengzhou, P.R. China
| | - Xiaolan Chen
- Department of Chemistry, Zhengzhou University, Key Laboratory of Organic Chemistry and Chemical Biology, Henan Province, Zhengzhou, P.R. China
| | - Jinwei Yuan
- Chemistry and Chemical Engineering School, Henan University of Technology, Henan Province, Zhengzhou, P.R. China
| | - Yang Liu
- Department of Chemistry, Zhengzhou University, Key Laboratory of Organic Chemistry and Chemical Biology, Henan Province, Zhengzhou, P.R. China
| | - Peipei Li
- Department of Chemistry, Zhengzhou University, Key Laboratory of Organic Chemistry and Chemical Biology, Henan Province, Zhengzhou, P.R. China
| | - Lingbo Qu
- Department of Chemistry, Zhengzhou University, Key Laboratory of Organic Chemistry and Chemical Biology, Henan Province, Zhengzhou, P.R. China
- Chemistry and Chemical Engineering School, Henan University of Technology, Henan Province, Zhengzhou, P.R. China
| | - Yufen Zhao
- Department of Chemistry, Zhengzhou University, Key Laboratory of Organic Chemistry and Chemical Biology, Henan Province, Zhengzhou, P.R. China
- Department of Chemistry, Xiamen University, Xiamen, 361005, P.R. China
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6
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Bisacchi GS, Manchester JI. A New-Class Antibacterial-Almost. Lessons in Drug Discovery and Development: A Critical Analysis of More than 50 Years of Effort toward ATPase Inhibitors of DNA Gyrase and Topoisomerase IV. ACS Infect Dis 2015; 1:4-41. [PMID: 27620144 DOI: 10.1021/id500013t] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The introduction into clinical practice of an ATPase inhibitor of bacterial DNA gyrase and topoisomerase IV (topo IV) would represent a new-class agent for the treatment of resistant bacterial infections. Novobiocin, the only historical member of this class, established the clinical proof of concept for this novel mechanism during the late 1950s, but its use declined rapidly and it was eventually withdrawn from the market. Despite significant and prolonged effort across the biopharmaceutical industry to develop other agents of this class, novobiocin remains the only ATPase inhibitor of gyrase and topo IV ever to progress beyond Phase I. In this review, we analyze the historical attempts to discover and develop agents within this class and highlight factors that might have hindered those efforts. Within the last 15 years, however, our technical understanding of the molecular details of the inhibition of the gyrase and topo IV ATPases, the factors governing resistance development to such inhibitors, and our knowledge of the physical properties required for robust clinical drug candidates have all matured to the point wherein the industry may now address this mechanism of action with greater confidence. The antibacterial spectrum within this class has recently been extended to begin to include serious Gram negative pathogens such as Pseudomonas aeruginosa, Acinetobacter baumannii, and Klebsiella pneumoniae. In spite of this recent technical progress, adverse economics associated with antibacterial R&D over the last 20 years has diminished industry's ability to commit the resources and perseverance needed to bring new-class agents to launch. Consequently, a number of recent efforts in the ATPase class have been derailed by organizational rather than scientific factors. Nevertheless, within this context we discuss the unique opportunity for the development of ATPase inhibitors of gyrase and topo IV as new-class antibacterial agents with broad spectrum potential.
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Affiliation(s)
- Gregory S. Bisacchi
- AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
| | - John I. Manchester
- AstraZeneca, 35 Gatehouse Drive, Waltham, Massachusetts 02451, United States
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7
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Shamsaddini A, Sheikhhosseini E. Synthesis of 3,3-Arylidene Bis(4-Hydroxycoumarin) Catalyzed by <i>p</i>-Dodecylbenzenesulfonic Acid (DBSA) in Aqueous Media and Microwave Irradiation. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/ijoc.2014.42015] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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8
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Mayer C, Janin YL. Non-quinolone inhibitors of bacterial type IIA topoisomerases: a feat of bioisosterism. Chem Rev 2013; 114:2313-42. [PMID: 24313284 DOI: 10.1021/cr4003984] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Claudine Mayer
- Unité de Microbiologie Structurale, Département de Biologie Structurale et Chimie, Institut Pasteur , 25 rue du Dr. Roux, 75724 Paris Cedex 15, France
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9
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Saíz-Urra L, Pérez MÁC, Froeyen M. Thermodynamic computational approach to capture molecular recognition in the binding of different inhibitors to the DNA gyrase B subunit from Escherichia coli. J Mol Model 2013; 19:3187-200. [PMID: 23625033 DOI: 10.1007/s00894-013-1849-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Accepted: 04/04/2013] [Indexed: 11/29/2022]
Abstract
DNA gyrase subunit B, that catalyzes the hydrolysis of ATP, is an attractive target for the development of antibacterial drugs. This work is intended to rationalize molecular recognition at DNA gyrase B enzyme - inhibitor binding interface through the evaluation of different scoring functions in finding the correct pose and scoring properly 50 Escherichia coli DNA Gyrase B inhibitors belonging to five different classes. Improving the binding free energy calculation accuracy is further attempted by using rescoring schemes after short molecular dynamic simulations of the obtained docked complexes. These data are then compared with the corresponding experimental enzyme activity data. The results are analyzed from a structural point of view emphasizing the strengths and limitations of the techniques applied in the study.
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Affiliation(s)
- Liane Saíz-Urra
- Laboratory for Medicinal Chemistry, Rega Institute for Medical Research, Katholieke Universiteit Leuven, Minderbroedersstraat 10, 3000 Leuven, Belgium
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10
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Škedelj V, Tomašić T, Mašič LP, Zega A. ATP-binding site of bacterial enzymes as a target for antibacterial drug design. J Med Chem 2011; 54:915-29. [PMID: 21235241 DOI: 10.1021/jm101121s] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Veronika Škedelj
- University of Ljubljana, Faculty of Pharmacy, Aškerčeva 7, 1000 Ljubljana, Slovenia
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11
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Cheenpracha S, Vidor NB, Yoshida WY, Davies J, Chang LC. Coumabiocins A-F, aminocoumarins from an organic extract of Streptomyces sp. L-4-4. JOURNAL OF NATURAL PRODUCTS 2010; 73:880-884. [PMID: 20384319 DOI: 10.1021/np900843b] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Bioassay-directed fractionation of the butanol extract of Streptomyces sp. L-4-4, using the hyphae formation inhibition assay of a prokaryotic whole cell, led to the isolation of six new aminocoumarins, coumabiocins A-F (1-6), along with two known compounds, novobiocin (7) and isonovobiocin (8). Coumabiocins A-E (1-5) contain three structural elements, a central 3-amino-7-hydroxycoumarin that is linked at the 3-amino group to a prenylated 4-hydroxybenzoic acid moiety and at the 7-position to an l-noviosyl sugar, while coumabiocin F (6) lacks the sugar moiety. Their structures were elucidated by spectroscopic methods including 1D- and 2D-NMR techniques and mass spectrometric analyses. Coumabiocins A-E (1-5) exhibited significant inhibitory activity against Streptomyces 85E and gave a 10-15 mm clear zone of inhibition at 20 microg/disk and a 10 mm bald and a 10 mm clear zone of inhibition at 5 and 10 microg/disk, respectively, whereas coumabiocin F (6) was inactive.
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Affiliation(s)
- Sarot Cheenpracha
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Hawaii at Hilo, 34 Rainbow Drive, Hilo, Hawaii 96720
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12
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Takaishi K, Izumi M, Baba N, Kawazu K, Nakajima S. Synthesis and biological evaluation of alkoxycoumarins as novel nematicidal constituents. Bioorg Med Chem Lett 2008; 18:5614-7. [PMID: 18793855 DOI: 10.1016/j.bmcl.2008.08.102] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2008] [Revised: 08/26/2008] [Accepted: 08/28/2008] [Indexed: 10/21/2022]
Abstract
We synthesized all of the monomethoxycoumarins, 5-alkoxycoumarins and their derivatives, and investigated their nematicidal activity against the phytopathogenic nematode, Bursaphelenchus xylophilus. Among the compounds, 5-ethoxycoumarin showed the highest nematicidal activity. Furthermore, 5-ethoxycoumarin was comparatively harmless against both the brine shrimps, Artemia salina, and the Japanese killifish, Oryzias latipes.
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Affiliation(s)
- Kazuto Takaishi
- Laboratory of Applied Natural Products Chemistry, The Graduate School of Natural Science and Technology, Okayama University, 1-1-1 Tsushimanaka, Okayama, Okayama 700-8530, Japan.
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13
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Riveiro ME, Vazquez R, Moglioni A, Gomez N, Baldi A, Davio C, Shayo C. Biochemical mechanisms underlying the pro-apoptotic activity of 7,8-dihydroxy-4-methylcoumarin in human leukemic cells. Biochem Pharmacol 2008; 75:725-36. [DOI: 10.1016/j.bcp.2007.09.025] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2007] [Revised: 09/22/2007] [Accepted: 09/25/2007] [Indexed: 12/18/2022]
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14
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Lamberth C, Kempf HJ, Kriz M. Synthesis and fungicidal activity of N-2-(3-methoxy-4-propargyloxy) phenethyl amides. Part 3: stretched and heterocyclic mandelamide oomyceticides. PEST MANAGEMENT SCIENCE 2007; 63:57-62. [PMID: 17078013 DOI: 10.1002/ps.1308] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Novel analogues of mandipropamid have been designed and prepared. The synthetic approach to these stretched and heterocyclic mandelamides is outlined. Biological data demonstrate their high efficacy against important plant diseases like tomato and potato late blight (Phytophthora infestans De Bary) and grape downy mildew (Plasmopara viticola Berliner & de Toni). Structure-activity relationship studies are discussed.
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Affiliation(s)
- Clemens Lamberth
- Syngenta AG, Crop Protection Research, Chemistry, Schwarzwaldallee 215, CH-4058 Basel, Switzerland.
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15
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Abstract
As part of a project to characterize selected members of the Kuwaiti flora for their phytochemistry and antimycobacterial activity, a new furanocoumarin, 5-[4''-hydroxy-3''-methyl-2''-butenyloxy]-6,7-furocoumarin (3), was isolated from the whole herb of Anethum graveolens. The known compounds oxypeucedanin (1), oxypeucedanin hydrate (2) and falcarindiol (4) were also isolated from this plant. The structure of each compound was determined by interpretation of NMR and mass spectrometric data. The three known compounds exhibited antibacterial activity against a panel of rapidly growing mycobacteria with minimum inhibitory concentration (MIC) values in the range 2-128 microg/mL.
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Affiliation(s)
- Michael Stavri
- Centre for Pharmacognosy and Phytotherapy, The School of Pharmacy, University of London, 29-39 Brunswick Square, UK
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16
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An efficient synthesis of 7-hydroxy-2,6-dimethylchromeno[3,4-d]oxazol-4-one—a protected fragment of novenamine. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.08.083] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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17
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Galm U, Heller S, Shapiro S, Page M, Li SM, Heide L. Antimicrobial and DNA gyrase-inhibitory activities of novel clorobiocin derivatives produced by mutasynthesis. Antimicrob Agents Chemother 2004; 48:1307-12. [PMID: 15047534 PMCID: PMC375324 DOI: 10.1128/aac.48.4.1307-1312.2004] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Twenty-eight novel clorobiocin derivatives obtained from mutasynthesis experiments were investigated for their inhibitory activity towards Escherichia coli DNA gyrase and for their antibacterial activities towards clinically relevant gram-positive and gram-negative bacteria in comparison to novobiocin and clorobiocin. Clorobiocin was the most active compound both against E. coli DNA gyrase in vitro and against bacterial growth. All tested modifications of the 3-dimethylallyl-4-hydroxybenzoyl moiety reduced biological activity. The highest activities were shown by compounds containing a hydrophobic alkyl substituent at position 3 of the 4-hydroxybenzoyl moiety. Polar groups in this side chain, especially amide functions, strongly reduced antibacterial activity. Replacement of the alkyl side chain with a halogen atom or a methoxy group at the same position markedly reduced activity. Transfer of the pyrrole carboxylic acid moiety from O-3" to O-2" of L-noviose moderately reduced activity, whereas the complete absence of the pyrrole carboxylic acid moiety led to a loss of activity. Desclorobiocin derivatives lacking the chlorine atom at C-8 of the 3-amino-4,7-dihydroxycoumarin moiety also showed low activity. Lack of a methyl group at O-4" of L-noviose resulted in an inactive compound. From these findings it appears that clorobiocin represents a "highly evolved" structure optimized for bacterial transport and DNA gyrase inhibition.
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Affiliation(s)
- Ute Galm
- Pharmazeutische Biologie, Pharmazeutisches Institut, D-72076 Tuebingen, Germany
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18
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Jeselnik M, Leban I, Polanc S, Kocevar M. D-Gulonolactone as a synthon for L-noviose: first preparation of 4-O-demethyl-L-noviofuranose and related derivatives. Org Lett 2003; 5:2651-3. [PMID: 12868881 DOI: 10.1021/ol034796t] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] A new synthesis of L-noviose (11), a sugar moiety of novobiocin, is presented. D-Gulonolactone was initially converted in a few steps to the key ester derivative 7 [1-O-benzyl methyl 2,3-O-(1-methylethylidene)-alpha-L-lyxofuranosiduronate]. An appropriate selection of protecting groups enabled transformation of 7 under mild reaction conditions to 4-O-demethyl-L-noviofuranose 9a and related 9b-c. Derivatives 9 were further converted either to L-lyxopyranoses (10a and 10b) or to methyl L-lyxofuranoside 12.
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Affiliation(s)
- Marjan Jeselnik
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Askerceva 5, SI-1000 Ljubljana, Slovenia
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19
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Schio L, Chatreaux F, Loyau V, Murer M, Ferreira A, Mauvais P, Bonnefoy A, Klich M. Fine Tuning of physico-chemical parameters to optimise a new series of novobiocin analogues. Bioorg Med Chem Lett 2001; 11:1461-4. [PMID: 11378377 DOI: 10.1016/s0960-894x(01)00257-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A novel series of novobiocin analogues has been synthesised by removing the lipophilic aryl chain in novobiocin and introducing an amino substituent. The structural modifications have been dictated by the control of lipophilicity and the dissociation constant of the resulting compounds. Antibacterial activity of the new coumarin derivatives could be correlated with the amount of uncharged form in physiological conditions.
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Affiliation(s)
- L Schio
- Medicinal Chemistry, Aventis Pharma, 102 route de Noisy, F-93235 Cedex, Romainville, France.
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20
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Wang ZX, Li SM, Heide L. Identification of the coumermycin A(1) biosynthetic gene cluster of Streptomyces rishiriensis DSM 40489. Antimicrob Agents Chemother 2000; 44:3040-8. [PMID: 11036020 PMCID: PMC101600 DOI: 10.1128/aac.44.11.3040-3048.2000] [Citation(s) in RCA: 107] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The biosynthetic gene cluster of the aminocoumarin antibiotic coumermycin A(1) was cloned by screening of a cosmid library of Streptomyces rishiriensis DSM 40489 with heterologous probes from a dTDP-glucose 4,6-dehydratase gene, involved in deoxysugar biosynthesis, and from the aminocoumarin resistance gyrase gene gyrB(r). Sequence analysis of a 30.8-kb region upstream of gyrB(r) revealed the presence of 28 complete open reading frames (ORFs). Fifteen of the identified ORFs showed, on average, 84% identity to corresponding ORFs in the biosynthetic gene cluster of novobiocin, another aminocoumarin antibiotic. Possible functions of 17 ORFs in the biosynthesis of coumermycin A(1) could be assigned by comparison with sequences in GenBank. Experimental proof for the function of the identified gene cluster was provided by an insertional gene inactivation experiment, which resulted in an abolishment of coumermycin A(1) production.
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Affiliation(s)
- Z X Wang
- Pharmazeutische Biologie, Pharmazeutisches Institut, Eberhard-Karls-Universität Tübingen, 72076 Tübingen, Germany
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21
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Musicki B, Periers AM, Laurin P, Ferroud D, Benedetti Y, Lachaud S, Chatreaux F, Haesslein JL, Iltis A, Pierre C, Khider J, Tessot N, Airault M, Demassey J, Dupuis-Hamelin C, Lassaigne P, Bonnefoy A, Vicat P, Klich M. Improved antibacterial activities of coumarin antibiotics bearing 5',5'-dialkylnoviose: biological activity of RU79115. Bioorg Med Chem Lett 2000; 10:1695-9. [PMID: 10937727 DOI: 10.1016/s0960-894x(00)00304-8] [Citation(s) in RCA: 93] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
A new series of coumarin inhibitors of DNA gyrase B bearing a N-propargyloxycarbamate at C-3' of various 5',5'-dialkylnoviose, including RU79115, were synthesised and their antibacterial activities have been delineated. Introduction of dialkyl substituents at 5'5'-position of noviose leads to coumarin analogues with improved in vitro and in vivo antibacterial activity.
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Affiliation(s)
- B Musicki
- Medicinal Chemistry, Hoechst Marion Roussel/Aventis, Romainville, France.
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Peixoto C, Laurin P, Klich M, Dupuis-Hamelin C, Mauvais P, Lassaigne P, Bonnefoy A, Musicki B. Synthesis of isothiochroman 2,2-dioxide and 1,2-benzooxathiin 2,2-dioxide gyrase B inhibitors. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)00044-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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