1
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Clowes SR, Ali Y, Astley OR, Răsădean DM, Pantoş GD. The Influence of Chirality on the β-Amino-Acid Naphthalenediimides/G-Quadruplex DNA Interaction. Molecules 2023; 28:7291. [PMID: 37959711 PMCID: PMC10647805 DOI: 10.3390/molecules28217291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/23/2023] [Accepted: 10/25/2023] [Indexed: 11/15/2023] Open
Abstract
G-quadruplexes (G4s) have been identified as a potential alternative chemotherapy target. A series of eight β-amino acid derived naphthalenediimides (NDI) were screened against a series of oncogenic G4 sequences: c-KIT1, h-TELO, and TBA. Three sets of enantiomers were investigated to further our understanding of the effect of point chirality on G4 stabilisation. Enantioselective binding behaviour was observed with both c-KIT1 and h-TELO. Docking studies using GNINA and UV-vis titrations were employed to better understand this selective binding behaviour.
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Affiliation(s)
| | | | | | | | - G. Dan Pantoş
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
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2
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Seimiya H, Nagasawa K, Shin-Ya K. Chemical targeting of G-quadruplexes in telomeres and beyond for molecular cancer therapeutics. J Antibiot (Tokyo) 2021; 74:617-628. [PMID: 34285374 DOI: 10.1038/s41429-021-00454-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/29/2021] [Accepted: 06/03/2021] [Indexed: 02/06/2023]
Abstract
G-quadruplexes (G4s) are higher-order structures formed by guanine-rich sequences of nucleic acids, such as the telomeric 5'-TTAGGG-3'/5'-UUAGGG-3' repeats and those in gene regulatory regions. G4s regulate various biological events, including replication, transcription, and translation. Imbalanced G4 dynamics is associated with diseases, such as cancer and neurodegenerative diseases. Telomestatin is a natural macrocyclic compound derived from Streptomyces anulatus 3533-SV4. It interacts with the guanine quartet via π-π stacking and potently stabilizes G4. Because G4 stabilization at the telomeric repeat inhibits the telomere-synthesizing enzyme telomerase, telomestatin was originally identified as a telomerase inhibitor. Whereas non-toxic doses of telomestatin induce gradual shortening of telomeres and eventual crisis in human cancer cells, higher doses trigger prompt replication stress and DNA damage responses, resulting in acute cell death. Suppression of the transcription and translation of G4-containing genes is also implicated in the anticancer effects of telomestatin. Because telomestatin is rare, labile, and insoluble, synthetic oxazole telomestatin derivatives have been developed and verified for their therapeutic efficacies in preclinical cancer models. Furthermore, a variety of G4-stabilizing compounds have been reported as promising seeds for molecular cancer therapeutics. To improve the design of future clinical studies, it will be important to identify predictive biomarkers of drug efficacy.
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Affiliation(s)
- Hiroyuki Seimiya
- Division of Molecular Biotherapy, Cancer Chemotherapy Center, Japanese Foundation for Cancer Research, Tokyo, Japan.
| | - Kazuo Nagasawa
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Kazuo Shin-Ya
- National Institute of Advanced Industrial Science and Technology, Tokyo, Japan.,Technology Research Association for Next Generation Natural Products Chemistry, Tokyo, Japan
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3
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Largy E, König A, Ghosh A, Ghosh D, Benabou S, Rosu F, Gabelica V. Mass Spectrometry of Nucleic Acid Noncovalent Complexes. Chem Rev 2021; 122:7720-7839. [PMID: 34587741 DOI: 10.1021/acs.chemrev.1c00386] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Nucleic acids have been among the first targets for antitumor drugs and antibiotics. With the unveiling of new biological roles in regulation of gene expression, specific DNA and RNA structures have become very attractive targets, especially when the corresponding proteins are undruggable. Biophysical assays to assess target structure as well as ligand binding stoichiometry, affinity, specificity, and binding modes are part of the drug development process. Mass spectrometry offers unique advantages as a biophysical method owing to its ability to distinguish each stoichiometry present in a mixture. In addition, advanced mass spectrometry approaches (reactive probing, fragmentation techniques, ion mobility spectrometry, ion spectroscopy) provide more detailed information on the complexes. Here, we review the fundamentals of mass spectrometry and all its particularities when studying noncovalent nucleic acid structures, and then review what has been learned thanks to mass spectrometry on nucleic acid structures, self-assemblies (e.g., duplexes or G-quadruplexes), and their complexes with ligands.
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Affiliation(s)
- Eric Largy
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
| | - Alexander König
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
| | - Anirban Ghosh
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
| | - Debasmita Ghosh
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
| | - Sanae Benabou
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
| | - Frédéric Rosu
- Univ. Bordeaux, CNRS, INSERM, IECB, UMS 3033, F-33600 Pessac, France
| | - Valérie Gabelica
- Univ. Bordeaux, CNRS, INSERM, ARNA, UMR 5320, U1212, IECB, F-33600 Pessac, France
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4
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Zhao J, Zhai Q. Recent advances in the development of ligands specifically targeting telomeric multimeric G-quadruplexes. Bioorg Chem 2020; 103:104229. [DOI: 10.1016/j.bioorg.2020.104229] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 08/16/2020] [Accepted: 08/20/2020] [Indexed: 01/24/2023]
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5
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Tutone M, Pecoraro B, Almerico AM. Investigation on Quantitative Structure-Activity Relationships of 1,3,4-Oxadiazole Derivatives as Potential Telomerase Inhibitors. Curr Drug Discov Technol 2020; 17:79-86. [PMID: 30039762 DOI: 10.2174/1570163815666180724113208] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 07/17/2018] [Accepted: 07/18/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Telomerase, a reverse transcriptase, maintains telomere and chromosomes integrity of dividing cells, while it is inactivated in most somatic cells. In tumor cells, telomerase is highly activated, and works in order to maintain the length of telomeres causing immortality, hence it could be considered as a potential marker to tumorigenesis.A series of 1,3,4-oxadiazole derivatives showed significant broad-spectrum anticancer activity against different cell lines, and demonstrated telomerase inhibition. METHODS This series of 24 N-benzylidene-2-((5-(pyridine-4-yl)-1,3,4-oxadiazol-2yl)thio)acetohydrazide derivatives as telomerase inhibitors has been considered to carry out QSAR studies. The endpoint to build QSAR models is determined by the IC50 values for telomerase inhibition, i.e., the concentration (μM) of inhibitor that produces 50% inhibition. These values were converted to pIC50 (- log IC50) values. We used the most common and transparent method, where models are described by clearly expressed mathematical equations: Multiple Linear Regression (MLR) by Ordinary Least Squares (OLS). RESULTS Validated models with high correlation coefficients were developed. The Multiple Linear Regression (MLR) models, by Ordinary Least Squares (OLS), showed good robustness and predictive capability, according to the Multi-Criteria Decision Making (MCDM = 0.8352), a technique that simultaneously enhances the performances of a certain number of criteria. The descriptors selected for the models, such as electrotopological state (E-state) descriptors, and extended topochemical atom (ETA) descriptors, showed the relevant chemical information contributing to the activity of these compounds. CONCLUSION The results obtained in this study make sure about the identification of potential hits as prospective telomerase inhibitors.
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Affiliation(s)
- Marco Tutone
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF) Universita degli Studi di Palermo, via Archirafi 28, 90123-Palermo, Italy
| | - Beatrice Pecoraro
- Department of Clinical and Pharmaceutical Sciences, School of Life and Medical Sciences, University of Hertfordshire, College Lane, Hatfield, Hertfordshire AL10 9AB, United Kingdom
| | - Anna M Almerico
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF) Universita degli Studi di Palermo, via Archirafi 28, 90123-Palermo, Italy
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6
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Abstract
This Review is devoted to the chemistry of macrocyclic peptides having heterocyclic fragments in their structure. These motifs are present in many natural products and synthetic macrocycles designed against a particular biochemical target. Thiazole and oxazole are particularly common constituents of naturally occurring macrocyclic peptide molecules. This frequency of occurrence is because the thiazole and oxazole rings originate from cysteine, serine, and threonine residues. Whereas other heteroaryl groups are found less frequently, they offer many insightful lessons that range from conformational control to receptor/ligand interactions. Many options to develop new and improved technologies to prepare natural products have appeared in recent years, and the synthetic community has been pursuing synthetic macrocycles that have no precedent in nature. This Review attempts to summarize progress in this area.
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Affiliation(s)
- Ivan V Smolyar
- Department of Chemistry , Moscow State University , Leninskije Gory , 199991 Moscow , Russia
| | - Andrei K Yudin
- Davenport Research Laboratories, Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada
| | - Valentine G Nenajdenko
- Department of Chemistry , Moscow State University , Leninskije Gory , 199991 Moscow , Russia
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7
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Dubovtsev AY, Dar'in DV, Kukushkin VY. Three‐Component [2+2+1] Gold(I)‐Catalyzed Oxidative Generation of Fully Substituted 1,3‐Oxazoles Involving Internal Alkynes. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900097] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Alexey Yu. Dubovtsev
- Saint Petersburg State University Universitetskaya Nab. 7/9 199034 Saint Petersburg Russian Federation
| | - Dmitry V. Dar'in
- Saint Petersburg State University Universitetskaya Nab. 7/9 199034 Saint Petersburg Russian Federation
| | - Vadim Yu. Kukushkin
- Saint Petersburg State University Universitetskaya Nab. 7/9 199034 Saint Petersburg Russian Federation
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8
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Nepal KK, Wang G. Streptomycetes: Surrogate hosts for the genetic manipulation of biosynthetic gene clusters and production of natural products. Biotechnol Adv 2019; 37:1-20. [PMID: 30312648 PMCID: PMC6343487 DOI: 10.1016/j.biotechadv.2018.10.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 09/04/2018] [Accepted: 10/05/2018] [Indexed: 12/23/2022]
Abstract
Due to the worldwide prevalence of multidrug-resistant pathogens and high incidence of diseases such as cancer, there is an urgent need for the discovery and development of new drugs. Nearly half of the FDA-approved drugs are derived from natural products that are produced by living organisms, mainly bacteria, fungi, and plants. Commercial development is often limited by the low yield of the desired compounds expressed by the native producers. In addition, recent advances in whole genome sequencing and bioinformatics have revealed an abundance of cryptic biosynthetic gene clusters within microbial genomes. Genetic manipulation of clusters in the native host is commonly used to awaken poorly expressed or silent gene clusters, however, the lack of feasible genetic manipulation systems in many strains often hinders our ability to engineer the native producers. The transfer of gene clusters into heterologous hosts for expression of partial or entire biosynthetic pathways is an approach that can be used to overcome this limitation. Heterologous expression also facilitates the chimeric fusion of different biosynthetic pathways, leading to the generation of "unnatural" natural products. The genus Streptomyces is especially known to be a prolific source of drugs/antibiotics, its members are often used as heterologous expression hosts. In this review, we summarize recent applications of Streptomyces species, S. coelicolor, S. lividans, S. albus, S. venezuelae and S. avermitilis, as heterologous expression systems.
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Affiliation(s)
- Keshav K Nepal
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 U.S. 1 North, Fort Pierce, FL 34946, USA
| | - Guojun Wang
- Harbor Branch Oceanographic Institute, Florida Atlantic University, 5600 U.S. 1 North, Fort Pierce, FL 34946, USA.
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9
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Verga D, N'Guyen CH, Dakir M, Coll JL, Teulade-Fichou MP, Molla A. Polyheteroaryl Oxazole/Pyridine-Based Compounds Selected in Vitro as G-Quadruplex Ligands Inhibit Rock Kinase and Exhibit Antiproliferative Activity. J Med Chem 2018; 61:10502-10518. [PMID: 30457335 DOI: 10.1021/acs.jmedchem.8b01023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Heptaheteroaryl compounds comprised of oxazole and pyridine units (TOxaPy) are quadruplex DNA (G4)-interactive compounds. Herein, we report on the synthesis of parent compounds bearing either amino side chains (TOxaPy-1-5) or featuring an isomeric oxazole-pyridine central connectivity (iso-TOxapy, iso-TOxapy 1-3) or a bipyridine core (iso-TOxabiPy). The new isomeric series showed significant G4-binding activity in vitro, and remarkably, three compounds (iso-TOxaPy, iso-TOxaPy-1, and iso-TOxabiPy) exhibited high antiproliferative activity toward a tumor panel of cancer cell lines. However, these compounds do not behave as typical G-quadruplex (G4) binders, and the kinase profiling assay revealed that the best antiproliferative molecule iso-TOxaPy selectively inhibited Rock-2. The targeting of Rock kinase was confirmed in cells by the dephosphorylation of Rock-2 substrates, the decrease of stress fibers, and peripheral focal adhesions, as well as the induction of long neurite-like extensions. Remarkably, two of these molecules were able to inhibit the growth of cells organized as spheroids.
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Affiliation(s)
- Daniela Verga
- "Chemistry, Modelling and Imaging for Biology", CNRS UMR9187-INSERM U1196, Institut Curie, Research Center Orsay, Bât 110, University Paris-Sud , 91405 Orsay , France
| | - Chi-Hung N'Guyen
- "Chemistry, Modelling and Imaging for Biology", CNRS UMR9187-INSERM U1196, Institut Curie, Research Center Orsay, Bât 110, University Paris-Sud , 91405 Orsay , France
| | - Malika Dakir
- University of Grenoble Alpes, CNRS UMR 5309, Inserm 1209, CHU Grenoble Alpes, IAB , 38400 Grenoble , France
| | - Jean-Luc Coll
- University of Grenoble Alpes, CNRS UMR 5309, Inserm 1209, CHU Grenoble Alpes, IAB , 38400 Grenoble , France
| | - Marie-Paule Teulade-Fichou
- "Chemistry, Modelling and Imaging for Biology", CNRS UMR9187-INSERM U1196, Institut Curie, Research Center Orsay, Bât 110, University Paris-Sud , 91405 Orsay , France
| | - Annie Molla
- University of Grenoble Alpes, CNRS UMR 5309, Inserm 1209, CHU Grenoble Alpes, IAB , 38400 Grenoble , France
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10
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Piotrowski ML, Kerr MA. Tandem Cyclopropanation/Vinylogous Cloke–Wilson Rearrangement for the Synthesis of Heterocyclic Scaffolds. Org Lett 2018; 20:7624-7627. [DOI: 10.1021/acs.orglett.8b03361] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Mathew L. Piotrowski
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7
| | - Michael A. Kerr
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7
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11
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Slobodyanyuk EY, Artamonov OS, Kulik IB, Rusanov E, Volochnyuk DM, Grygorenko OO. A bio-inspired approach to proline-derived 2,4-disubstituted oxazoles. HETEROCYCL COMMUN 2018. [DOI: 10.1515/hc-2017-0235] [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
Abstract
A convenient four-step approach to the synthesis of (S)-4-alkyl-2-(pyrrolidin-2-yl)oxazoles starting from l-Boc-proline inspired by naturally occurring oxazole-containing peptidomimetics is described. The key step is the cyclization of 1-Boc-N-(1-oxoalkan-2-yl)pyrrolidine-2-carboxamides – aldehyde intermediates which demonstrate low to moderate stability – under Appel reaction conditions. This method furnishes the target compounds with more than 98% ee and in a 17–51% overall yield and has been used at up to a 45-g scale.
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Affiliation(s)
- Evgeniy Y. Slobodyanyuk
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine , Kyiv 02660 , Ukraine
| | - Oleksiy S. Artamonov
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine , Kyiv 02660 , Ukraine
| | - Irene B. Kulik
- Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Sciences of Ukraine , Kyiv 02660 , Ukraine
| | - Eduard Rusanov
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine , Kyiv 02660 , Ukraine
| | - Dmitriy M. Volochnyuk
- Institute of Organic Chemistry, National Academy of Sciences of Ukraine , Kyiv 02660 , Ukraine
| | - Oleksandr O. Grygorenko
- National Taras Shevchenko University of Kyiv , Volodymyrska Street, 64 , Kyiv 01601 , Ukraine
- Enamine Ltd. , Chervonotkatska 78 , Kyiv 02094 , Ukraine
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12
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Inman M, Dexter HL, Moody CJ. Total Synthesis of the Cyclic Dodecapeptides Wewakazole and Wewakazole B. Org Lett 2017; 19:3454-3457. [PMID: 28617610 DOI: 10.1021/acs.orglett.7b01393] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The cyclic dodecapeptides wewakazole and wewakazole B have been synthesized by a divergent strategy via a common tris-proline containing oxazole octapeptide and two separate bis-oxazole containing tetrapeptide units, followed by peptide coupling and macrocyclization. The three oxazole amino acid fragments are readily accessible by rhodium(II)-catalyzed amide N-H insertion of diazocarbonyl compounds, or by the cycloaddition of rhodium carbenoids with nitriles.
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Affiliation(s)
- Martyn Inman
- School of Chemistry, University of Nottingham , University Park, Nottingham NG2 7RD, U.K
| | - Hannah L Dexter
- School of Chemistry, University of Nottingham , University Park, Nottingham NG2 7RD, U.K
| | - Christopher J Moody
- School of Chemistry, University of Nottingham , University Park, Nottingham NG2 7RD, U.K
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13
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Amagai K, Ikeda H, Hashimoto J, Kozone I, Izumikawa M, Kudo F, Eguchi T, Nakamura T, Osada H, Takahashi S, Shin-Ya K. Identification of a gene cluster for telomestatin biosynthesis and heterologous expression using a specific promoter in a clean host. Sci Rep 2017; 7:3382. [PMID: 28611443 PMCID: PMC5469769 DOI: 10.1038/s41598-017-03308-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 04/26/2017] [Indexed: 01/24/2023] Open
Abstract
Telomestatin, a strong telomerase inhibitor with G-quadruplex stabilizing activity, is a potential therapeutic agent for treating cancers. Difficulties in isolating telomestatin from microbial cultures and in chemical synthesis are bottlenecks impeding the wider use. Therefore, improvement in telomestatin production and structural diversification are required for further utilization and application. Here, we discovered the gene cluster responsible for telomestatin biosynthesis, and achieved production of telomestatin by heterologous expression of this cluster in the engineered Streptomyces avermitilis SUKA strain. Utilization of an optimal promoter was essential for successful production. Gene disruption studies revealed that the tlsB, tlsC, and tlsO-T genes play key roles in telomestatin biosynthesis. Moreover, exchanging TlsC core peptide sequences resulted in the production of novel telomestatin derivatives. This study sheds light on the expansion of chemical diversity of natural peptide products for drug development.
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Affiliation(s)
- Keita Amagai
- Technology Research Association for Next Generation Natural Products Chemistry, 2-4-7 Aomi, Koto-ku, Tokyo, 135-0064, Japan
- RIKEN Center for Sustainable Resource Science, Natural Product Biosynthesis Research Unit, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Haruo Ikeda
- Kitasato Institute for Life Sciences, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0373, Japan
| | - Junko Hashimoto
- Japan Biological Informatics Consortium, 2-4-7 Aomi, Koto-ku, Tokyo, 135-0064, Japan
| | - Ikuko Kozone
- Japan Biological Informatics Consortium, 2-4-7 Aomi, Koto-ku, Tokyo, 135-0064, Japan
| | - Miho Izumikawa
- Japan Biological Informatics Consortium, 2-4-7 Aomi, Koto-ku, Tokyo, 135-0064, Japan
| | - Fumitaka Kudo
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Tadashi Eguchi
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo, 152-8551, Japan
| | - Takemichi Nakamura
- RIKEN Center for Sustainable Resource Science, Molecular Structure Characterization Unit, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Hiroyuki Osada
- RIKEN Center for Sustainable Resource Science, Chemical Biology Research Group, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan
| | - Shunji Takahashi
- RIKEN Center for Sustainable Resource Science, Natural Product Biosynthesis Research Unit, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
| | - Kazuo Shin-Ya
- National Institute of Advanced Industrial Science and Technology, 2-4-7 Aomi, Koto-ku, Tokyo, 135-0064, Japan.
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14
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Xu X, Wang Y, Cui X, Wojtas L, Zhang XP. Metalloradical activation of α-formyldiazoacetates for the catalytic asymmetric radical cyclopropanation of alkenes. Chem Sci 2017; 8:4347-4351. [PMID: 28959396 PMCID: PMC5605771 DOI: 10.1039/c7sc00658f] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Accepted: 03/27/2017] [Indexed: 11/21/2022] Open
Abstract
For the first time, α-formyldiazoacetates have been successfully applied for the asymmetric cyclopropanation of alkenes via Co(ii)-based metalloradical catalysis. The cobalt(ii) complex of the D2-symmetric chiral amidoporphyrin [Co(3,5-Di t Bu-ChenPhyrin)] is an effective metalloradical catalyst that can activate α-formyldiazoacetates to cyclopropanate both aromatic and aliphatic olefins with varied electronic properties, affording the synthetically useful 1,1-cyclopropaneformylesters in high yields with both high diastereo- and enantioselectivity.
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Affiliation(s)
- Xue Xu
- Department of Chemistry , University of South Florida , Tampa , FL 33620 , USA
| | - Yong Wang
- Department of Chemistry , Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , USA .
| | - Xin Cui
- Department of Chemistry , University of South Florida , Tampa , FL 33620 , USA
| | - Lukasz Wojtas
- Department of Chemistry , University of South Florida , Tampa , FL 33620 , USA
| | - X Peter Zhang
- Department of Chemistry , Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , USA . .,Department of Chemistry , University of South Florida , Tampa , FL 33620 , USA
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15
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Dexter HL, Williams HEL, Lewis W, Moody CJ. Total Synthesis of the Post-translationally Modified Polyazole Peptide Antibiotic Goadsporin. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | | | - William Lewis
- School of Chemistry; University Park Nottingham NG7 2RD UK
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16
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Dexter HL, Williams HEL, Lewis W, Moody CJ. Total Synthesis of the Post-translationally Modified Polyazole Peptide Antibiotic Goadsporin. Angew Chem Int Ed Engl 2017; 56:3069-3073. [PMID: 28145618 DOI: 10.1002/anie.201612103] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Revised: 01/17/2017] [Indexed: 11/06/2022]
Abstract
The structurally unique polyazole antibiotic goadsporin contains six heteroaromatic oxazole and thiazole rings integrated into a linear array of amino acids that also contains two dehydroalanine residues. An efficient total synthesis of goadsporin is reported in which the key steps are the use of rhodium(II)-catalyzed reactions of diazocarbonyl compounds to generate the four oxazole rings, which demonstrates the power of rhodium carbene chemistry in organic chemical synthesis.
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Affiliation(s)
- Hannah L Dexter
- School of Chemistry, University Park, Nottingham, NG7 2RD, UK
| | | | - William Lewis
- School of Chemistry, University Park, Nottingham, NG7 2RD, UK
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17
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A Synopsis of the Properties and Applications of Heteroaromatic Rings in Medicinal Chemistry. ADVANCES IN HETEROCYCLIC CHEMISTRY 2017. [DOI: 10.1016/bs.aihch.2016.11.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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18
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Xu C, Qin M, Yi J, Wang Y, Chen Y, Zhang B, Zhao Y, Gong P. Copper( ii)-mediated formation of oxazole-4-carbonitrile from acetophenone and coordinated cyanide anion via a radical coupling. RSC Adv 2017. [DOI: 10.1039/c7ra01983a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A protocol for the direct synthesis of 4-aryloxazole-5-carbonitrile from acetophenone was first described.
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Affiliation(s)
- Congjun Xu
- Key Laboratory of Structure-based Drug Design and Discovery
- Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Mingze Qin
- Key Laboratory of Structure-based Drug Design and Discovery
- Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Jun Yi
- Key Laboratory of Structure-based Drug Design and Discovery
- Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Yanjing Wang
- Key Laboratory of Structure-based Drug Design and Discovery
- Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Yanfeng Chen
- Key Laboratory of Structure-based Drug Design and Discovery
- Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Bingfu Zhang
- Key Laboratory of Structure-based Drug Design and Discovery
- Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Yanfang Zhao
- Key Laboratory of Structure-based Drug Design and Discovery
- Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- People's Republic of China
| | - Ping Gong
- Key Laboratory of Structure-based Drug Design and Discovery
- Shenyang Pharmaceutical University
- Ministry of Education
- Shenyang 110016
- People's Republic of China
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19
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Li M, Han P, Mao ZY, Zhou W, Si CM, Xiong J, Wei BG, Hu JF. Studies toward asymmetric synthesis of hoiamides A and B. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.11.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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20
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Goudedranche S, Besnard C, Egger L, Lacour J. Synthesis of Pyrrolidines and Pyrrolizidines with α-Pseudoquaternary Centers by Copper-Catalyzed Condensation of α-Diazodicarbonyl Compounds and Aryl γ-Lactams. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607574] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Sébastien Goudedranche
- Département de Chimie Organique; Université de Genève; quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Céline Besnard
- Laboratoire de Cristallographie; Université de Genève; quai Ernest Ansermet 24 1211 Geneva 4 Switzerland
| | - Léo Egger
- Département de Chimie Organique; Université de Genève; quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Jérôme Lacour
- Département de Chimie Organique; Université de Genève; quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
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21
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Goudedranche S, Besnard C, Egger L, Lacour J. Synthesis of Pyrrolidines and Pyrrolizidines with α-Pseudoquaternary Centers by Copper-Catalyzed Condensation of α-Diazodicarbonyl Compounds and Aryl γ-Lactams. Angew Chem Int Ed Engl 2016; 55:13775-13779. [DOI: 10.1002/anie.201607574] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Sébastien Goudedranche
- Département de Chimie Organique; Université de Genève; quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Céline Besnard
- Laboratoire de Cristallographie; Université de Genève; quai Ernest Ansermet 24 1211 Geneva 4 Switzerland
| | - Léo Egger
- Département de Chimie Organique; Université de Genève; quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
| | - Jérôme Lacour
- Département de Chimie Organique; Université de Genève; quai Ernest Ansermet 30 1211 Geneva 4 Switzerland
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22
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Zhang X, Huang Z, Wu S, Lin R, Liu J, Su N. Investigation of antitumor mechanism of the chiral ruthenium complex Λ-[Ru(phen) 2 p-MOPIP] 2+ in human gastric cancer MGC-803 cells. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.07.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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23
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Abstract
Quadruplex-forming sequences are widely prevalent in human and other genomes, including bacterial ones. These sequences are over-represented in eukaryotic telomeres, promoters, and 5' untranslated regions. They can form quadruplex structures, which may be transient in many situations in normal cells since they can be effectively resolved by helicase action. Mutated helicases in cancer cells are unable to unwind quadruplexes, which are impediments to transcription, translation, or replication, depending on their location within a particular gene. Small molecules that can stabilize quadruplex structures augment these effects and produce cell and proliferation growth inhibition. This article surveys the chemical biology of quadruplexes. It critically examines the major classes of quadruplex-binding small molecules that have been developed to date and the various approaches to discovering selective agents. The challenges of requiring (and achieving) small-molecule targeted selectivity for a particular quadruplex are discussed in relation to the potential of these small molecules as clinically useful therapeutic agents.
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Affiliation(s)
- Stephen Neidle
- UCL School of Pharmacy, University College London , 29-39 Brunswick Square, London WC1N 1AX, U.K
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24
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Abstract
The first total syntheses of newly isolated polyazole natural products azolemycins A–D, along with the synthesis of the tetra-oxazole non-natural analogue, are described.
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Affiliation(s)
| | - David J. Fox
- Department of Chemistry
- University of Warwick
- Coventry
- UK
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25
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Thumar N, Wei Q, Hu W. Recent Advances in Asymmetric Metal-Catalyzed Carbene Transfer from Diazo Compounds Toward Molecular Complexity. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2016. [DOI: 10.1016/bs.adomc.2016.08.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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26
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Seyfried MS, Alzeer J, Luedtke NW. Molecular Design and Synthesis of a Planar Telomestatin Analogue. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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27
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Wada H, Williams HEL, Moody CJ. Total Synthesis of the Posttranslationally Modified Polyazole Peptide Antibiotic Plantazolicin A. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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28
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Wada H, Williams HEL, Moody CJ. Total Synthesis of the Posttranslationally Modified Polyazole Peptide Antibiotic Plantazolicin A. Angew Chem Int Ed Engl 2015; 54:15147-51. [PMID: 26473502 DOI: 10.1002/anie.201507062] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Indexed: 11/06/2022]
Abstract
The power of rhodium-carbene methodology in chemistry is demonstrated by the synthesis of a structurally complex polyazole antibiotic. Plantazolicin A, a novel soil-bacterium metabolite, comprises a linear array of 10 five-membered rings in two pentacyclic regions that derive from ribosomal peptide synthesis followed by extensive posttranslational modification. The compound possesses potent antimicrobial activity, and is selectively active against the anthrax-causing organism. A conceptually different synthesis of plantazolicin A is reported in which the key steps are the use of rhodium(II)-catalyzed reactions of diazocarbonyl compounds to generate up to six of the seven oxazole rings of the antibiotic. NMR spectroscopic studies and molecular modeling reveal a likely dynamic hairpin conformation with a hinge region around the two isoleucine residues. The compound has modest activity against methicillin-resistant Staphylococcus aureus (MRSA).
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Affiliation(s)
- Hiroki Wada
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD (UK)
| | - Huw E L Williams
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD (UK)
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29
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Patel A, Lewis W, Searle MS, Stevens MF, Moody CJ. Synthesis of 6-arylisocytosines and their potential for hydrogen bonding interactions. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.084] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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30
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Human telomerase inhibitors from microbial source. World J Microbiol Biotechnol 2015; 31:1329-41. [DOI: 10.1007/s11274-015-1893-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 06/18/2015] [Indexed: 12/31/2022]
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31
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Marchand A, Granzhan A, Iida K, Tsushima Y, Ma Y, Nagasawa K, Teulade-Fichou MP, Gabelica V. Ligand-induced conformational changes with cation ejection upon binding to human telomeric DNA G-quadruplexes. J Am Chem Soc 2015; 137:750-6. [PMID: 25525863 DOI: 10.1021/ja5099403] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The rational design of ligands targeting human telomeric DNA G-quadruplexes is a complex problem due to the structural polymorphism that these sequences can adopt in physiological conditions. Moreover, the ability of ligands to switch conformational equilibria between different G-quadruplex structures is often overlooked in docking approaches. Here, we demonstrate that three of the most potent G-quadruplex ligands (360A, Phen-DC3, and pyridostatin) induce conformational changes of telomeric DNA G-quadruplexes to an antiparallel structure (as determined by circular dichroism) containing only one specifically coordinated K(+) (as determined by electrospray mass spectrometry) and, hence, presumably only two consecutive G-quartets. Control ligands TrisQ, known to bind preferentially to hybrid than to antiparallel structures, and L2H2-6M(2)OTD, known not to disrupt the hybrid-1 structure, did not show such K(+) removal. Instead, binding of the cyclic oxazole L2H2-6M(2)OTD was accompanied by the uptake of one additional K(+). Also contrasting with telomeric G-quadruplexes, the parallel-stranded Pu24-myc G-quadruplex, to which Phen-DC3 is known to bind by end-stacking, did not undergo cation removal upon ligand binding. Our study therefore evidences that very affine ligands can induce conformational switching of the human telomeric G-quadruplexes to an antiparallel structure and that this conformational change is accompanied by removal of one interquartet cation.
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Affiliation(s)
- Adrien Marchand
- IECB, ARNA Laboratory, University of Bordeaux , 33600 Pessac, France
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32
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Doi T, Yoshida M, Shibata K. Total Synthesis of Telomestatin and its Analogues. J SYN ORG CHEM JPN 2015. [DOI: 10.5059/yukigoseikyokaishi.73.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takayuki Doi
- Graduate School of Pharmaceutical Sciences, Tohoku University
| | | | - Kazuaki Shibata
- Department of Applied Chemistry, Tokyo Institute of Technology
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33
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Romero-Estudillo I, Batchu VR, Boto A. One-Pot Conversion of Amino Acids into 2,5-Disubstituted Oxazoles: No Metals Needed. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400496] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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34
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Müller S, Rodriguez R. G-quadruplex interacting small molecules and drugs: from bench toward bedside. Expert Rev Clin Pharmacol 2014; 7:663-79. [DOI: 10.1586/17512433.2014.945909] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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36
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Qi F, Gao L, Han F. Design and Synthesis of Polyoxazole-based Macrocycles Tethered with a Phosphonate Group. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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37
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Small-molecule quadruplex-targeted drug discovery. Bioorg Med Chem Lett 2014; 24:2602-12. [DOI: 10.1016/j.bmcl.2014.04.029] [Citation(s) in RCA: 149] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 04/06/2014] [Accepted: 04/08/2014] [Indexed: 01/24/2023]
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38
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Haldón E, Besora M, Cano I, Cambeiro XC, Pericàs MA, Maseras F, Nicasio MC, Pérez PJ. Reaction of Alkynes and Azides: Not Triazoles Through Copper-Acetylides but Oxazoles Through Copper-Nitrene Intermediates. Chemistry 2014; 20:3463-74. [DOI: 10.1002/chem.201303737] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Indexed: 12/20/2022]
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39
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Ohnmacht SA, Varavipour E, Nanjunda R, Pazitna I, Di Vita G, Gunaratnam M, Kumar A, Ismail MA, Boykin DW, Wilson WD, Neidle S. Discovery of new G-quadruplex binding chemotypes. Chem Commun (Camb) 2014; 50:960-3. [PMID: 24302123 PMCID: PMC3901018 DOI: 10.1039/c3cc48616h] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here on the discovery and preliminary evaluation of a novel non-macrocyclic low molecular weight quadruplex-stabilizing chemotype. The lead compounds, based on a furan core, show high G-quadruplex stabilisation and selectivity as well as potent in vitro anti-proliferative activity.
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40
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41
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Shibata K, Yoshida M, Takahashi T, Takagi M, Shin-ya K, Doi T. Synthesis of Heptaoxazole Macrocyclic Analogues of Telomestatin and Evaluation of Their Telomerase Inhibitory Activities. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2013. [DOI: 10.1246/bcsj.20130198] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kazuaki Shibata
- Department of Applied Chemistry, Tokyo Institute of Technology
| | | | | | - Motoki Takagi
- Biomedicinal Information Research Center (BIRC), Japan Biological Informatics Consortium (JBIC)
| | - Kazuo Shin-ya
- National Institute of Advanced Industrial Science and Technology (AIST)
| | - Takayuki Doi
- Graduate School of Pharmaceutical Sciences, Tohoku University
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42
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Zhang F, Wang XL, Shi J, Wang SF, Yin Y, Yang YS, Zhang WM, Zhu HL. Synthesis, molecular modeling and biological evaluation of N-benzylidene-2-((5-(pyridin-4-yl)-1,3,4-oxadiazol-2-yl)thio)acetohydrazide derivatives as potential anticancer agents. Bioorg Med Chem 2013; 22:468-77. [PMID: 24286761 DOI: 10.1016/j.bmc.2013.11.004] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Revised: 11/03/2013] [Accepted: 11/04/2013] [Indexed: 12/12/2022]
Abstract
A series of new 1,3,4-oxadiazole derivatives (6a-6x) containing pyridine and acylhydrazone moieties were synthesized and developed as potential telomerase inhibitors. The bioassay tests demonstrated that compounds 6n, 6o, 6q, 6s and 6t exhibited significant broad-spectrum anticancer activity with IC₅₀ range from 0.76 to 9.59 μM against the four cancer cell lines (HEPG2, MCF7, SW1116 and BGC823). Moreover, all the title compounds were assayed for telomerase inhibition using the TRAP-PCR-ELISA assay. Compound 6s showed the highest anticancer activity with IC₅₀ of 0.76-1.54 μM against the tested cancer cell lines and exhibited the most potent telomerase inhibitory activity with IC₅₀ of 1.18 ± 0.14 μM. The docking simulation was carried out to investigate a possible binding mode of compound 6s into the active site of telomerase (pdb. 3DU6) while the QSAR model was built to check the previous work as well as to introduce new directions.
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Affiliation(s)
- Fei Zhang
- Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, People's Republic of China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China
| | - Xiao-Liang Wang
- Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, People's Republic of China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China
| | - Jing Shi
- Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, People's Republic of China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China
| | - She-Feng Wang
- Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, People's Republic of China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China
| | - Yong Yin
- Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, People's Republic of China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China
| | - Yu-Shun Yang
- Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, People's Republic of China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China
| | - Wei-Ming Zhang
- Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, People's Republic of China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China.
| | - Hai-Liang Zhu
- Nanjing Institute for the Comprehensive Utilization of Wild Plant, Nanjing 210042, People's Republic of China; State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China.
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43
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Iida K, Nagasawa K. Macrocyclic Polyoxazoles as G-Quadruplex Ligands. CHEM REC 2013; 13:539-48. [DOI: 10.1002/tcr.201300015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Indexed: 01/11/2023]
Affiliation(s)
- Keisuke Iida
- Tokyo University of Agriculture and Technology; 2-24-16 Naka-cho Koganei Tokyo 184-8588 Japan
| | - Kazuo Nagasawa
- Tokyo University of Agriculture and Technology; 2-24-16 Naka-cho Koganei Tokyo 184-8588 Japan
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44
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Chung WJ, Heddi B, Tera M, Iida K, Nagasawa K, Phan AT. Solution Structure of an Intramolecular (3 + 1) Human Telomeric G-Quadruplex Bound to a Telomestatin Derivative. J Am Chem Soc 2013; 135:13495-501. [DOI: 10.1021/ja405843r] [Citation(s) in RCA: 137] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Wan Jun Chung
- School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore
| | - Brahim Heddi
- School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore
| | - Masayuki Tera
- Department
of Biotechnology and Life Science, Faculty of Technology, Tokyo University of Agriculture and Technology, Japan
- Bioorganic Research Institute, Suntory Foundation for Life Science, Japan
| | - Keisuke Iida
- Department
of Biotechnology and Life Science, Faculty of Technology, Tokyo University of Agriculture and Technology, Japan
| | - Kazuo Nagasawa
- Department
of Biotechnology and Life Science, Faculty of Technology, Tokyo University of Agriculture and Technology, Japan
| | - Anh Tuân Phan
- School of Physical and Mathematical
Sciences, Nanyang Technological University, Singapore
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45
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Yugandar S, Acharya A, Ila H. Synthesis of 2,5-Bis(hetero)aryl 4′-Substituted 4,5′-Bisoxazoles via Copper(I)-Catalyzed Domino Reactions of Activated Methylene Isocyanides with 2-Phenyl- and 2-(2-Thienyl)-4-[(aryl/heteroaryl)(methylthio)methylene]oxazol-5(4H)-ones. J Org Chem 2013; 78:3948-60. [DOI: 10.1021/jo400317g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Somaraju Yugandar
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur,
Bangalore-50064, India
| | - Anand Acharya
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur,
Bangalore-50064, India
| | - Hiriyakkanavar Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur,
Bangalore-50064, India
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46
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47
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Sjoberg J. Ammonium ion binding to DNA G-quadruplexes: do electrospray mass spectra faithfully reflect the solution-phase species? JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:1-8. [PMID: 23132414 PMCID: PMC5110665 DOI: 10.1007/s13361-012-0499-3] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Revised: 09/04/2012] [Accepted: 09/04/2012] [Indexed: 06/01/2023]
Abstract
G-quadruplex nucleic acids can bind ammonium ions in solution, and these complexes can be detected by electrospray mass spectrometry (ESI-MS). However, because ammonium ions are volatile, the extent to which ESI-MS quantitatively could provide an accurate reflection of such solution-phase equilibria is unclear. Here we studied five G-quadruplexes having known solution-phase structure and ammonium ion binding constants: the bimolecular G-quadruplexes (dG(4)T(4)G(4))(2), (dG(4)T(3)G(4))(2), and (dG(3)T(4)G(4))(2), and the intramolecular G-quadruplexes dG(4)(T(4)G(4))(3) and dG(2)T(2)G(2)TGTG(2)T(2)G(2) (thrombin binding aptamer). We found that not all mass spectrometers are equally suited to reflect the solution phase species. Ion activation can occur in the electrospray source, or in a high-pressure traveling wave ion mobility cell. When the softest instrumental conditions are used, ammonium ions bound between G-quartets, but also additional ammonium ions bound at specific sites outside the external G-quartets, can be observed. However, even specifically bound ammonium ions are in some instances too labile to be fully retained in the gas phase structures, and although the ammonium ion distribution observed by ESI-MS shows biases at specific stoichiometries, the relative abundances in solution are not always faithfully reflected. Ion mobility spectrometry results show that all inter-quartet ammonium ions are necessary to preserve the G-quadruplex fold in the gas phase. Ion mobility experiments, therefore, help assign the number of inner ammonium ions in the solution phase structure.
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48
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Liu X, Cheng R, Zhao F, Zhang-Negrerie D, Du Y, Zhao K. Direct β-Acyloxylation of Enamines via PhIO-Mediated Intermolecular Oxidative C–O Bond Formation and Its Application to the Synthesis of Oxazoles. Org Lett 2012; 14:5480-3. [DOI: 10.1021/ol3025583] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Xin Liu
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Ran Cheng
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Feifei Zhao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Daisy Zhang-Negrerie
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
| | - Kang Zhao
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
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49
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Petenzi M, Verga D, Largy E, Hamon F, Doria F, Teulade-Fichou MP, Guédin A, Mergny JL, Mella M, Freccero M. Cationic pentaheteroaryls as selective G-quadruplex ligands by solvent-free microwave-assisted synthesis. Chemistry 2012; 18:14487-96. [PMID: 22996572 DOI: 10.1002/chem.201202097] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Indexed: 12/15/2022]
Abstract
We report herein a solvent-free and microwaved-assisted synthesis of several water soluble acyclic pentaheteroaryls containing 1,2,4-oxadiazole moieties (1-7). Their binding interactions with DNA quadruplex structures were thoroughly investigated by FRET melting, fluorescent intercalator displacement assay (G4-FID) and CD spectroscopy. Among the G-quadruplexes considered, attention was focused on telomeric repeats together with the proto-oncogenic c-kit sequences and the c-myc oncogene promoter. Compound 1, and to a lesser extent 2 and 5, preferentially stabilise an antiparallel structure of the telomeric DNA motif, and exhibit an opposite binding behaviour to structurally related polyoxazole (TOxaPy), and do not bind duplex DNA. The efficiency and selectivity of the binding process was remarkably controlled by the structure of the solubilising moieties.
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Affiliation(s)
- Michele Petenzi
- Dipartimento di Chimica, Università di Pavia, V.le Taramelli 10, 27100 Pavia, Italy
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Xu Y, Komiyama M. Structure, function and targeting of human telomere RNA. Methods 2012; 57:100-5. [PMID: 22425636 DOI: 10.1016/j.ymeth.2012.02.015] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 02/26/2012] [Accepted: 02/28/2012] [Indexed: 11/18/2022] Open
Abstract
Human telomeres play an important role in critical processes underlying genome stability, cancer, and aging. For a long time, telomeres have been considered transcriptionally silent. A recent finding demonstrated that telomere DNA is transcribed into telomeric repeat-containing RNA (referred to as TERRA) in mammalian cells. The existence of TERRA RNA may reveal a new level of regulation and protection of chromosome ends that could promote valuable insight into fundamental biological processes such as cancer and aging. Revealing the structure and function of telomere RNA will be essential for understanding telomere biology and telomere-related diseases. NMR and X-ray crystallography have demonstrated that human telomere RNA forms G-quadruplex structures. More recently, human telomere RNA is suggested to form a G-quadruplex dimer in the living cells by employing a light-switching probe. The proposed structures may be a valuable target for anticancer agents directed against telomeres. This review highlights the structures and topologies for telomere RNA G-quadruplex and recent efforts in the design of telomere RNA G-quadruplex ligands. The future challenges in the field are outlined.
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Affiliation(s)
- Yan Xu
- Division of Chemistry, Department of Medical Sciences, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan.
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