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Arseniev A, Panfilov M, Pobegalov G, Potyseva A, Pavlinova P, Yakunina M, Lee J, Borukhov S, Severinov K, Khodorkovskii M. Single-molecule studies reveal the off-pathway elemental pause state as a target of streptolydigin inhibition of RNA polymerase and its dramatic enhancement by Gre factors. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.05.542125. [PMID: 37333075 PMCID: PMC10274647 DOI: 10.1101/2023.06.05.542125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Antibiotic streptolydigin (Stl) inhibits bacterial transcription by blocking the trigger loop folding in the active center of RNA polymerase (RNAP), which is essential for catalysis. We use acoustic force spectroscopy to characterize the dynamics of transcription elongation in ternary elongation complexes of RNAP (ECs) in the presence of Stl at a single-molecule level. We found that Stl induces long-lived stochastic pauses while the instantaneous velocity of transcription between the pauses is unaffected. Stl enhances the short-lived pauses associated with an off-pathway elemental paused state of the RNAP nucleotide addition cycle. Unexpectedly, we found that transcript cleavage factors GreA and GreB, which were thought to be Stl competitors, do not alleviate the streptolydigin-induced pausing; instead, they synergistically increase transcription inhibition by Stl. This is the first known instance of a transcriptional factor enhancing antibiotic activity. We propose a structural model of the EC-Gre-Stl complex that explains the observed Stl activities and provides insight into possible cooperative action of secondary channel factors and other antibiotics binding at the Stl-pocket. These results offer a new strategy for high-throughput screening for prospective antibacterial agents.
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Affiliation(s)
- Anatolii Arseniev
- Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, Russia
- Institute of Molecular Genetics, Russian Academy of Sciences, Moscow, Russian Federation
| | - Mikhail Panfilov
- Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, Russia
| | - Georgii Pobegalov
- Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, Russia
| | - Alina Potyseva
- Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, Russia
| | - Polina Pavlinova
- Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, Russia
| | - Maria Yakunina
- Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, Russia
| | - Jookyung Lee
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ 08084-1489, USA
| | - Sergei Borukhov
- Department of Cell Biology and Neuroscience, Rowan University School of Osteopathic Medicine, Stratford, NJ 08084-1489, USA
| | - Konstantin Severinov
- Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia
- Waksman Institute of Microbiology, Rutgers, The State University of New Jersey, Piscataway, NJ, United States
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Osama N, Bakeer W, Raslan M, Soliman HA, Abdelmohsen UR, Sebak M. Anti-cancer and antimicrobial potential of five soil Streptomycetes: a metabolomics-based study. ROYAL SOCIETY OPEN SCIENCE 2022; 9:211509. [PMID: 35154794 PMCID: PMC8825997 DOI: 10.1098/rsos.211509] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 01/14/2022] [Indexed: 05/03/2023]
Abstract
Lack of new anti-cancer and anti-infective agents directed the pharmaceutical research to natural products' discovery especially from actinomycetes as one of the major sources of bioactive compounds. Metabolomics- and dereplication-guided approach has been used successfully in chemical profiling of bioactive actinomycetes. We aimed to study the metabolomic profile of five bioactive actinomycetes to investigate the interesting metabolites responsible for their antimicrobial and anti-cancer activities. Three actinomycetes, namely, Streptomyces sp. SH8, SH10 and SH13, were found to exhibit broad spectrum of antimicrobial activities, whereas isolate SH4 showed the broadest antimicrobial activity against all tested strains. In addition, isolates SH8, SH10 and SH12 displayed potent cytotoxicity against the breast cancer cell line Michigan Cancer Foundation-7 (MCF-7), whereas isolates SH4 and SH12 exhibited potent anti-cancer activity against the hepatoma cell line hepatoma G2 (HepG2) compared with their weak inhibitory properties on the normal breast cells MCF-10A and normal liver cells transformed human liver epithelial-2 (THLE2), respectively. All bioactive isolates were molecularly identified as Streptomyces sp. via 16S rRNA gene sequencing. Our actinobacterial dereplication analysis revealed putative identification of several bioactive metabolites including tetracycline, oxytetracycline and a macrolide antibiotic, novamethymycin. Together, chemical profiling of bioactive Streptomycetes via dereplication and metabolomics helped in assigning their unique metabolites and predicting the bioactive compounds instigating their diverse bioactivities.
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Affiliation(s)
- Nada Osama
- Biotechnology and Life Sciences Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Walid Bakeer
- Microbiology and Immunology Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Mai Raslan
- Biotechnology and Life Sciences Department, Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Hanan A. Soliman
- Biochemistry Division, Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia 61519, Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, New Minia 61111, Egypt
| | - Mohamed Sebak
- Microbiology and Immunology Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, 62511, Egypt
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Kim H, Kim S, Kim M, Lee C, Yang I, Nam SJ. Bioactive natural products from the genus Salinospora: a review. Arch Pharm Res 2020; 43:1230-1258. [PMID: 33237436 DOI: 10.1007/s12272-020-01288-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 11/13/2020] [Indexed: 12/29/2022]
Abstract
Actinomycetes are an important source for bioactive secondary metabolites. Among them, the genus Salinispora is one of the first salt obligatory marine species worldwide and is typically found in various types of substrates in tropical and subtropical marine environments including sediments and marine organisms. This genus produces a wide range of chemical scaffolds and bioactive compounds such as lomaiviticins, cyclomarins, rifamycins, salinaphthoquinones, and salinosporamides. This review arranged Salinispora derived secondary metabolites according to the three species that comprise the genus. Moreover, muta- and semi-synthesis analogs derived from salinosporamide were also described in this review.
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Affiliation(s)
- Haerin Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Sohee Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Minju Kim
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Chaeyoung Lee
- The Graduate School of Industrial Pharmaceutical Sciences, Ewha Womans University, Seoul, 03760, Korea
| | - Inho Yang
- Department of Convergence Study on the Ocean Science and Technology, Korea Maritime and Ocean University, Pusan, 49112, Korea.
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul, 03760, Korea.
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Hatakeyama S. Stereocontrolled Total Synthesis of Biologically Active Natural Products. YAKUGAKU ZASSHI 2018; 138:191-209. [DOI: 10.1248/yakushi.17-00187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Ogasawara Y, Kondo K, Ikeda A, Harada R, Dairi T. Identification of tirandamycins as specific inhibitors of the futalosine pathway. J Antibiot (Tokyo) 2017; 70:798-800. [DOI: 10.1038/ja.2017.22] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 01/23/2017] [Accepted: 01/26/2017] [Indexed: 02/06/2023]
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Castro-Falcón G, Hahn D, Reimer D, Hughes CC. Thiol Probes To Detect Electrophilic Natural Products Based on Their Mechanism of Action. ACS Chem Biol 2016; 11:2328-36. [PMID: 27294329 DOI: 10.1021/acschembio.5b00924] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
New methods are urgently needed to find novel natural products as structural leads for the development of new drugs against emerging diseases such as cancer and multiresistant bacterial infections. Here we introduce a reactivity-guided drug discovery approach for electrophilic natural products, a therapeutically relevant class of natural products that covalently modify their cellular targets, in crude extracts. Using carefully designed halogenated aromatic reagents, the process furnishes derivatives that are UV-active and highly conspicuous via mass spectrometry by virtue of an isotopically unique bromine or chlorine tag. In addition to the identification of high-value metabolites, the process facilitates the difficult task of structure elucidation by providing derivatives that are primed for X-ray crystallographic analysis. We show that a cysteine probe efficiently and chemoselectively labels enone-, β-lactam-, and β-lactone-based electrophilic natural products (parthenolide, andrographolide, wortmannin, penicillin G, salinosporamide), while a thiophenol probe preferentially labels epoxide-based electrophilic natural products (triptolide, epoxomicin, eponemycin, cyclomarin, salinamide). Using the optimized method, we were able to detect and isolate the epoxide-bearing natural product tirandalydigin from Salinispora and thereby link an orphan gene cluster to its gene product.
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Affiliation(s)
- Gabriel Castro-Falcón
- Center for Marine Biotechnology
and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, United States
| | - Dongyup Hahn
- Center for Marine Biotechnology
and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, United States
| | - Daniela Reimer
- Center for Marine Biotechnology
and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, United States
| | - Chambers C. Hughes
- Center for Marine Biotechnology
and Biomedicine, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093, United States
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Jarrad A, Karoli T, Blaskovich MAT, Lyras D, Cooper MA. Clostridium difficile drug pipeline: challenges in discovery and development of new agents. J Med Chem 2015; 58:5164-85. [PMID: 25760275 PMCID: PMC4500462 DOI: 10.1021/jm5016846] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Indexed: 12/17/2022]
Abstract
In the past decade Clostridium difficile has become a bacterial pathogen of global significance. Epidemic strains have spread throughout hospitals, while community acquired infections and other sources ensure a constant inoculation of spores into hospitals. In response to the increasing medical burden, a new C. difficile antibiotic, fidaxomicin, was approved in 2011 for the treatment of C. difficile-associated diarrhea. Rudimentary fecal transplants are also being trialed as effective treatments. Despite these advances, therapies that are more effective against C. difficile spores and less damaging to the resident gastrointestinal microbiome and that reduce recurrent disease are still desperately needed. However, bringing a new treatment for C. difficile infection to market involves particular challenges. This review covers the current drug discovery pipeline, including both small molecule and biologic therapies, and highlights the challenges associated with in vitro and in vivo models of C. difficile infection for drug screening and lead optimization.
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Affiliation(s)
- Angie
M. Jarrad
- The
Institute for Molecular Bioscience, University
of Queensland, St. Lucia, Queensland 4072, Australia
| | - Tomislav Karoli
- The
Institute for Molecular Bioscience, University
of Queensland, St. Lucia, Queensland 4072, Australia
| | - Mark A. T. Blaskovich
- The
Institute for Molecular Bioscience, University
of Queensland, St. Lucia, Queensland 4072, Australia
| | - Dena Lyras
- School
of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia
| | - Matthew A. Cooper
- The
Institute for Molecular Bioscience, University
of Queensland, St. Lucia, Queensland 4072, Australia
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9
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Zhao S, Chen S, Wang B, Niu S, Wu W, Guo L, Che Y. Four new tetramic acid and one new furanone derivatives from the plant endophytic fungus Neopestalotiopsis sp. Fitoterapia 2015; 103:106-12. [DOI: 10.1016/j.fitote.2015.03.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 03/20/2015] [Accepted: 03/22/2015] [Indexed: 10/23/2022]
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Yoshimura H, Takahashi K, Ishihara J, Hatakeyama S. Unified synthesis of tirandamycins and streptolydigins. Chem Commun (Camb) 2015; 51:17004-7. [PMID: 26448062 DOI: 10.1039/c5cc07749d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The comprehensive approach to tirandamycin and streptolydigin antibiotics has been developed utilizing a cinchona alkaloid-catalyzed asymmetric Morita–Baylis–Hillman reaction.
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Affiliation(s)
- Hikaru Yoshimura
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | | | - Jun Ishihara
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
| | - Susumi Hatakeyama
- Graduate School of Biomedical Sciences
- Nagasaki University
- Nagasaki 852-8521
- Japan
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11
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Jeong YC, Anwar M, Bikadi Z, Hazai E, Moloney MG. Natural product inspired antibacterial tetramic acid libraries with dual enzyme inhibition. Chem Sci 2013. [DOI: 10.1039/c2sc21713a] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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12
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Mao L, Li Y, Xiong T, Sun K, Zhang Q. Synthesis of Tetramic Acid Derivatives via Intramolecular sp3 C–H Amination Mediated by Hypervalent Iodine(III) Reagents/Brønsted Acids. J Org Chem 2012; 78:733-7. [DOI: 10.1021/jo302144w] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Lujia Mao
- Department
of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Yan Li
- Department
of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Tao Xiong
- Department
of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Kai Sun
- Department
of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
| | - Qian Zhang
- Department
of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China
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13
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Yadav JS, Dhara S, Hossain SS, Mohapatra DK. Total Synthesis of (−)-Tirandamycin C Utilizing a Desymmetrization Protocol. J Org Chem 2012; 77:9628-33. [DOI: 10.1021/jo3016709] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- J. S. Yadav
- Natural Products Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad
500 007, India
| | - Santu Dhara
- Natural Products Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad
500 007, India
| | - Sk. Samad Hossain
- Natural Products Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad
500 007, India
| | - Debendra K. Mohapatra
- Natural Products Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad
500 007, India
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Pronin SV, Martinez A, Kuznedelov K, Severinov K, Shuman HA, Kozmin SA. Chemical synthesis enables biochemical and antibacterial evaluation of streptolydigin antibiotics. J Am Chem Soc 2011; 133:12172-84. [PMID: 21714556 PMCID: PMC3174773 DOI: 10.1021/ja2041964] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Inhibition of bacterial transcription represents an effective and clinically validated anti-infective chemotherapeutic strategy. We describe the evolution of our approach to the streptolydigin class of antibiotics that target bacterial RNA polymerases (RNAPs). This effort resulted in the synthesis and biological evaluation of streptolydigin, streptolydiginone, streptolic acid, and a series of new streptolydigin-based agents. Subsequent biochemical evaluation of RNAP inhibition demonstrated that the presence of both streptolic acid and tetramic acid subunits was required for activity of this class of antibiotics. In addition, we identified 10,11-dihydrostreptolydigin as a new RNAP-targeting agent, which was assembled with high synthetic efficiency of 15 steps in the longest linear sequence. Dihydrostreptolydigin inhibited three representative bacterial RNAPs and displayed in vitro antibacterial activity against S. salivarius . The overall increase in synthetic efficiency combined with substantial antibacterial activity of this fully synthetic antibiotic demonstrates the power of organic synthesis in enabling design and comprehensive in vitro pharmacological evaluation of new chemical agents that target bacterial transcription.
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Affiliation(s)
- Sergey V. Pronin
- Department of Chemistry, University of Chicago, Chicago, Illinois 60607, United States
| | - Anthony Martinez
- Department of Chemistry, University of Chicago, Chicago, Illinois 60607, United States
| | - Konstantin Kuznedelov
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, New Jersey 08854, United States
| | - Konstantin Severinov
- Department of Molecular Biology and Biochemistry, Rutgers University, Piscataway, New Jersey 08854, United States
- Institutes of Gene Biology and Molecualr Genetics, Russian Academy of Sciences, Moscow, Russia
| | - Howard A. Shuman
- Department of Microbiology, University of Chicago, Chicago, Illinois 60607, United States
| | - Sergey A. Kozmin
- Department of Chemistry, University of Chicago, Chicago, Illinois 60607, United States
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15
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Pronin SV, Kozmin SA. Synthesis of Streptolydigin, a Potent Bacterial RNA Polymerase Inhibitor. J Am Chem Soc 2010; 132:14394-6. [DOI: 10.1021/ja107190w] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Du YL, Chen SF, Cheng LY, Shen XL, Tian Y, Li YQ. Identification of a novel Streptomyces chattanoogensis L10 and enhancing its natamycin production by overexpressing positive regulator ScnRII. J Microbiol 2009; 47:506-13. [DOI: 10.1007/s12275-009-0014-0] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Accepted: 04/21/2009] [Indexed: 10/20/2022]
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Neumann K, Kehraus S, Gütschow M, König GM. Cytotoxic and HLE-Inhibitory Tetramic Acid Derivatives from Marine-Derived Fungi. Nat Prod Commun 2009. [DOI: 10.1177/1934578x0900400308] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Tetramic acid derivatives are an important class of nitrogen heterocycles with a pyrrolidine-2,4-dione core as a key structural motif. From the sponge-derived fungus Beauveria bassiana, a new equisetin-like tetramic acid derivative, beauversetin (1), was isolated. The sea weed-derived fungus Microdiplodia sp. produced the tetramic acid derivative 2 (Sch210972) which was shown to inhibit human leucocyte elastase (HLE) with an IC50 of 1.04 μg mL−1.
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Affiliation(s)
- Kerstin Neumann
- Institute for Pharmaceutical Biology, University of Bonn, 53115 Bonn, Germany
| | - Stefan Kehraus
- Institute for Pharmaceutical Biology, University of Bonn, 53115 Bonn, Germany
| | - Michael Gütschow
- Pharmaceutical Chemistry I, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
| | - Gabriele M. König
- Institute for Pharmaceutical Biology, University of Bonn, 53115 Bonn, Germany
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Schobert R, Schlenk A. Tetramic and tetronic acids: an update on new derivatives and biological aspects. Bioorg Med Chem 2008; 16:4203-21. [PMID: 18334299 DOI: 10.1016/j.bmc.2008.02.069] [Citation(s) in RCA: 316] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2007] [Revised: 02/18/2008] [Accepted: 02/21/2008] [Indexed: 11/18/2022]
Abstract
Significant developments in the isolation of tetramic acids and tetronic acids, in the elucidation of their biosyntheses and their biological activities and in laboratory syntheses are reviewed with a focus on those derivatives with medicinal and pharmacological relevance. Important new members of the title compound families isolated since the year 2000 are covered as well as new biological aspects of some earlier congeners.
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Affiliation(s)
- Rainer Schobert
- Organic Chemistry Laboratory, University of Bayreuth, Bayreuth, Germany.
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Lin ZJ, Lu ZY, Zhu TJ, Fang YC, Gu QQ, Zhu WM. Penicillenols from Penicillium sp. GQ-7, an Endophytic Fungus Associated with Aegiceras corniculatum. Chem Pharm Bull (Tokyo) 2008; 56:217-21. [DOI: 10.1248/cpb.56.217] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Zhen-Jian Lin
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China
| | - Zhen-Yu Lu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China
| | - Tian-Jiao Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China
| | - Yu-Chun Fang
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China
| | - Qian-Qun Gu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China
| | - Wei-Ming Zhu
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, School of Medicine and Pharmacy, Ocean University of China
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20
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Singh BK, Bisht SS, Tripathi RP. An efficient synthesis of tetramic acid derivatives with extended conjugation from L-ascorbic acid. Beilstein J Org Chem 2006; 2:24. [PMID: 17147830 PMCID: PMC1783862 DOI: 10.1186/1860-5397-2-24] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2006] [Accepted: 12/06/2006] [Indexed: 11/10/2022] Open
Abstract
Background Tetramic acids with polyenyl substituents are an important class of compounds in medicinal chemistry. Both solid and solution phase syntheses of such molecules have been reported recently. Thiolactomycin, a clinical candidate for treatment of tuberculosis has led to further explorations in this class. We have recently developed an efficient synthesis of tetramic acids derivatives from L- ascorbic acid. In continuation of this work, we have synthesised dienyl tetramic acid derivatives. Results 5,6-O-Isopropylidene-ascorbic acid on reaction with DBU led to the formation of tetronolactonyl allyl alcohol, which on oxidation with pyridinium chlorochromate gave the respective tetranolactonyl allylic aldehydes. Wittig olefination followed by reaction of the resulting tetranolactonyl dienyl esters with different amines resulted in the respective 5-hydroxy lactams. Subsequent dehydration of the hydroxy lactams with p-toluene sulphonic acid afforded the dienyl tetramic acid derivatives. All reactions were performed at ambient temperature and the yields are good. Conclusion An efficient and practical method for the synthesis of dienyl tetramic acid derivatives from inexpensive and easily accessible ascorbic acid has been developed. The compounds bear structural similarities to the tetramic acid based polyenic antibiotics and thus this method offers a new and short route for the synthesis of tetramic acid derivatives of biological significance.
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Affiliation(s)
- Biswajit K Singh
- Medicinal and Process Chemistry Division, Central Drug Research Institute, Lucknow-226001, India
| | - Surendra S Bisht
- Medicinal and Process Chemistry Division, Central Drug Research Institute, Lucknow-226001, India
| | - Rama P Tripathi
- Medicinal and Process Chemistry Division, Central Drug Research Institute, Lucknow-226001, India
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Iwata Y, Maekawara N, Tanino K, Miyashita M. Tetramic acid antibiotics: stereoselective synthesis of streptolic acid and tirandalydigin. Angew Chem Int Ed Engl 2006; 44:1532-6. [PMID: 15678438 DOI: 10.1002/anie.200462300] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yasuhiro Iwata
- Division of Chemistry, Graduate School of Science, Hokkaido University, 060-0810 Sapporo, Japan
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22
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Iwata Y, Maekawara N, Tanino K, Miyashita M. Tetramic Acid Antibiotics: Stereoselective Synthesis of Streptolic Acid and Tirandalydigin. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200462300] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Gossauer A. Monopyrrolic natural compounds including tetramic acid derivatives. FORTSCHRITTE DER CHEMIE ORGANISCHER NATURSTOFFE = PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS. PROGRES DANS LA CHIMIE DES SUBSTANCES ORGANIQUES NATURELLES 2003; 86:1-188. [PMID: 12899123 DOI: 10.1007/978-3-7091-6029-9_1] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Albert Gossauer
- Department of Chemistry, University of Fribourg, Fribourg, Switzerland
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Li JY, Strobel G, Harper J, Lobkovsky E, Clardy J. Cryptocin, a potent tetramic acid antimycotic from the endophytic fungus Cryptosporiopsis cf. quercina. Org Lett 2000; 2:767-70. [PMID: 10754679 DOI: 10.1021/ol000008d] [Citation(s) in RCA: 131] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[formula: see text] The endophytic fungus Cryptosporiopsis cf. quercina produces cryptocin in culture. Among other fungi, this unique tetramic acid displays antimycotic activity against Pyricularia oryzae, the causal agent of rice blast disease. Cryptocin also possesses activity against a wide variety of plant pathogenic but not human pathogenic fungi. The fine rhomboid-like crystals of cryptocin allowed structural elucidation by X-ray crystallography. The importance of cryptocin to the symbiotic relationship of C. quercina to its hosts is briefly discussed.
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Affiliation(s)
- J Y Li
- Department of Plant Sciences, Montana State University, Bozeman 59717, USA
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Natural products with polyene amide structures. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s1572-5995(00)80011-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Synthesis of the Tetramic Acid Antibiotics. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/b978-0-444-81780-8.50009-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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