1
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Chappell TC, Maiello KG, Tierney AJ, Yanagi K, Lee JA, Lee K, Mace CR, Bennett CS, Nair NU. Rapid spectrophotometric detection for optimized production of landomycins and characterization of their therapeutic potential. Biotechnol Bioeng 2024; 121:2648-2661. [PMID: 38686918 PMCID: PMC11324409 DOI: 10.1002/bit.28725] [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: 11/28/2023] [Revised: 03/28/2024] [Accepted: 04/12/2024] [Indexed: 05/02/2024]
Abstract
Microbial-derived natural products remain a major source of structurally diverse bioactive compounds and chemical scaffolds that have the potential as new therapeutics to target drug-resistant pathogens and cancers. In particular, genome mining has revealed the vast number of cryptic or low-yield biosynthetic gene clusters in the genus Streptomyces. However, low natural product yields-improvements to which have been hindered by the lack of high throughput methods-have slowed the discovery and development of many potential therapeutics. Here, we describe our efforts to improve yields of landomycins-angucycline family polyketides under investigation as cancer therapeutics-by a genetically modified Streptomyces cyanogenus 136. After simplifying the extraction process from S. cyanogenus cultures, we identified a wavelength at which the major landomycin products are absorbed in culture extracts, which we used to systematically explore culture medium compositions to improve total landomycin titers. Through correlational analysis, we simplified the culture optimization process by identifying an alternative wavelength at which culture supernatants absorb yet is representative of total landomycin titers. Using the subsequently improved sample throughput, we explored landomycin production during the culturing process to further increase landomycin yield and reduce culture time. Testing the antimicrobial activity of the isolated landomycins, we report broad inhibition of Gram-positive bacteria, inhibition of fungi by landomycinone, and broad landomycin resistance by Gram-negative bacteria that is likely mediated by the exclusion of landomycins by the bacterial membrane. Finally, the anticancer activity of the isolated landomycins against A549 lung carcinoma cells agrees with previous reports on other cell lines that glycan chain length correlates with activity. Given the prevalence of natural products produced by Streptomyces, as well as the light-absorbing moieties common to bioactive natural products and their metabolic precursors, our method is relevant to improving the yields of other natural products of interest.
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Affiliation(s)
- Todd C Chappell
- Department of Chemical & Biological Engineering, Tufts University, Medford, Massachusetts, USA
| | | | - Allison J Tierney
- Department of Chemistry, Tufts University, Medford, Massachusetts, USA
| | - Karin Yanagi
- Department of Chemical & Biological Engineering, Tufts University, Medford, Massachusetts, USA
| | - Jessica A Lee
- Department of Chemical & Biological Engineering, Tufts University, Medford, Massachusetts, USA
| | - Kyongbum Lee
- Department of Chemical & Biological Engineering, Tufts University, Medford, Massachusetts, USA
| | - Charles R Mace
- Department of Chemistry, Tufts University, Medford, Massachusetts, USA
| | - Clay S Bennett
- Department of Chemistry, Tufts University, Medford, Massachusetts, USA
| | - Nikhil U Nair
- Department of Chemical & Biological Engineering, Tufts University, Medford, Massachusetts, USA
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2
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Nuutila A, Xiao X, van der Heul HU, van Wezel GP, Dinis P, Elsayed SS, Metsä-Ketelä M. Divergence of Classical and C-Ring-Cleaved Angucyclines: Elucidation of Early Tailoring Steps in Lugdunomycin and Thioangucycline Biosynthesis. ACS Chem Biol 2024; 19:1131-1141. [PMID: 38668630 PMCID: PMC11106748 DOI: 10.1021/acschembio.4c00082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 04/16/2024] [Accepted: 04/16/2024] [Indexed: 05/18/2024]
Abstract
Angucyclines are an important group of microbial natural products that display tremendous chemical diversity. Classical angucyclines are composed of a tetracyclic benz[a]anthracene scaffold with one ring attached at an angular orientation. However, in atypical angucyclines, the polyaromatic aglycone is cleaved at A-, B-, or C-rings, leading to structural rearrangements and enabling further chemical variety. Here, we have elucidated the branching points in angucycline biosynthesis leading toward cleavage of the C-ring in lugdunomycin and thioangucycline biosynthesis. We showed that 12-hydroxylation and 6-ketoreduction of UWM6 are shared steps in classical and C-ring-cleaved angucycline pathways, although the bifunctional 6-ketoreductase LugOIIred harbors additional unique 1-ketoreductase activity. We identified formation of the key intermediate 8-O-methyltetrangomycin by the LugN methyltransferase as the branching point toward C-ring-cleaved angucyclines. The final common step in lugdunomycin and thioangucycline biosynthesis is quinone reduction, catalyzed by the 7-ketoreductases LugG and TacO, respectively. In turn, the committing step toward thioangucyclines is 12-ketoreduction catalyzed by TacA, for which no orthologous protein exists on the lugdunomycin pathway. Our results confirm that quinone reductions are early tailoring steps and, therefore, may be mechanistically important for subsequent C-ring cleavage. Finally, many of the tailoring enzymes harbored broad substrate promiscuity, which we utilized in combinatorial enzymatic syntheses to generate the angucyclines SM 196 A and hydranthomycin. We propose that enzyme promiscuity and the competition of many of the enzymes for the same substrates lead to a branching biosynthetic network and formation of numerous shunt products typical for angucyclines rather than a canonical linear metabolic pathway.
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Affiliation(s)
- Aleksi Nuutila
- Department
of Life Technologies, University of Turku, FIN20014 Turku, Finland
| | - Xiansha Xiao
- Molecular
Biotechnology, Leiden University, PO Box 9505, 2300RA Leiden, The
Netherlands
| | - Helga U. van der Heul
- Molecular
Biotechnology, Leiden University, PO Box 9505, 2300RA Leiden, The
Netherlands
| | - Gilles P. van Wezel
- Molecular
Biotechnology, Leiden University, PO Box 9505, 2300RA Leiden, The
Netherlands
| | - Pedro Dinis
- Department
of Life Technologies, University of Turku, FIN20014 Turku, Finland
| | - Somayah S. Elsayed
- Molecular
Biotechnology, Leiden University, PO Box 9505, 2300RA Leiden, The
Netherlands
| | - Mikko Metsä-Ketelä
- Department
of Life Technologies, University of Turku, FIN20014 Turku, Finland
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3
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Yongpanich P, Chatrangsan K, Tummatorn J, Thongsornkleeb C, Ruchirawat S. Controllable Chemoselectivity Cascade Reactions for the Synthesis of Phenanthrenols via Palladium-Catalyzed-Suzuki/Heck Reaction and Michael Addition. Chem Asian J 2024; 19:e202400126. [PMID: 38441246 DOI: 10.1002/asia.202400126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/02/2024] [Indexed: 03/28/2024]
Abstract
Palladium serves as a multi-functional catalyst which is controllable by tuning reaction conditions. This work demonstrated the utilization of a palladium catalyst for the synthesis of phenanthrenols by cascade palladium-catalyzed Suzuki/Heck reaction between chalcone and 2-bromophenylboronic acid, followed by Michael addition. The sequential reaction could be controlled by reactivity of the palladium catalyst in different solvents and concentrations of reagents. This protocol could be applied to a broad range of substrates to give products in low to good yields.
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Affiliation(s)
- Phornphan Yongpanich
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxi-cology (EHT), OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, 10210, Bangkok, Thailand
| | - Kamonlak Chatrangsan
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxi-cology (EHT), OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, 10210, Bangkok, Thailand
| | - Jumreang Tummatorn
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxi-cology (EHT), OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, 10210, Bangkok, Thailand
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, 10210, Bangkok, Thailand
| | - Charnsak Thongsornkleeb
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxi-cology (EHT), OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, 10210, Bangkok, Thailand
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, 10210, Bangkok, Thailand
| | - Somsak Ruchirawat
- Program on Chemical Sciences, Chulabhorn Graduate Institute, Center of Excellence on Environmental Health and Toxi-cology (EHT), OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, 10210, Bangkok, Thailand
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, 10210, Bangkok, Thailand
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4
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Jalali E, Wang F, Overbay BR, Miller MD, Shaaban KA, Ponomareva LV, Ye Q, Saghaeiannejad-Esfahani H, Bhardwaj M, Steele AD, Teijaro CN, Shen B, Van Lanen SG, She QB, Voss SR, Phillips GN, Thorson JS. Biochemical and Structural Studies of the Carminomycin 4- O-Methyltransferase DnrK. JOURNAL OF NATURAL PRODUCTS 2024; 87:798-809. [PMID: 38412432 DOI: 10.1021/acs.jnatprod.3c00947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
Structural and functional studies of the carminomycin 4-O-methyltransferase DnrK are described, with an emphasis on interrogating the acceptor substrate scope of DnrK. Specifically, the evaluation of 100 structurally and functionally diverse natural products and natural product mimetics revealed an array of pharmacophores as productive DnrK substrates. Representative newly identified DnrK substrates from this study included anthracyclines, angucyclines, anthraquinone-fused enediynes, flavonoids, pyranonaphthoquinones, and polyketides. The ligand-bound structure of DnrK bound to a non-native fluorescent hydroxycoumarin acceptor, 4-methylumbelliferone, along with corresponding DnrK kinetic parameters for 4-methylumbelliferone and native acceptor carminomycin are also reported for the first time. The demonstrated unique permissivity of DnrK highlights the potential for DnrK as a new tool in future biocatalytic and/or strain engineering applications. In addition, the comparative bioactivity assessment (cancer cell line cytotoxicity, 4E-BP1 phosphorylation, and axolotl embryo tail regeneration) of a select set of DnrK substrates/products highlights the ability of anthracycline 4-O-methylation to dictate diverse functional outcomes.
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Affiliation(s)
| | - Fengbin Wang
- Department of Biosciences, Rice University, Houston, Texas 77030, United States
| | | | - Mitchell D Miller
- Department of Biosciences, Rice University, Houston, Texas 77030, United States
| | | | | | - Qing Ye
- Markey Cancer Center, Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
| | | | | | | | | | | | | | - Qing-Bai She
- Markey Cancer Center, Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
| | - S Randal Voss
- Department of Neuroscience, University of Kentucky, Lexington, Kentucky 40536, United States
- Ambystoma Genetic Stock Center, University of Kentucky, Lexington, Kentucky 40536, United States
- Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, Kentucky 40536, United States
| | - George N Phillips
- Department of Biosciences, Rice University, Houston, Texas 77030, United States
- Department of Chemistry, Rice University, Houston, Texas 77030, United States
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5
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Nuñez Santiago I, Machushynets NV, Mladic M, van Bergeijk DA, Elsayed SS, Hankemeier T, van Wezel GP. nanoRAPIDS as an analytical pipeline for the discovery of novel bioactive metabolites in complex culture extracts at the nanoscale. Commun Chem 2024; 7:71. [PMID: 38561415 PMCID: PMC10984978 DOI: 10.1038/s42004-024-01153-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Accepted: 03/15/2024] [Indexed: 04/04/2024] Open
Abstract
Microbial natural products form the basis of most of the antibiotics used in the clinic. The vast majority has not yet been discovered, among others because the hidden chemical space is obscured by previously identified (and typically abundant) antibiotics in culture extracts. Efficient dereplication is therefore key to the discovery of our future medicines. Here we present an analytical platform for the efficient identification and prioritization of low abundance bioactive compounds at nanoliter scale, called nanoRAPIDS. NanoRAPIDS encompasses analytical scale separation and nanofractionation of natural extracts, followed by the bioassay of interest, automated mass spectrometry identification, and Global Natural Products Social molecular networking (GNPS) for dereplication. As little as 10 μL crude extract is fractionated into 384 fractions. First, bioactive congeners of iturins and surfactins were identified in Bacillus, based on their bioactivity. Subsequently, bioactive molecules were identified in an extensive network of angucyclines elicited by catechol in cultures of Streptomyces sp. This allowed the discovery of a highly unusual N-acetylcysteine conjugate of saquayamycin, despite low production levels in an otherwise abundant molecular family. These data underline the utility and broad application of the technology for the prioritization of minor bioactive compounds in complex extracts.
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Affiliation(s)
- Isabel Nuñez Santiago
- Molecular Biotechnology, Institute of Biology, Leiden University, Leiden, The Netherlands
| | | | - Marija Mladic
- Molecular Biotechnology, Institute of Biology, Leiden University, Leiden, The Netherlands
- DSM-Firmenich, Delft, The Netherlands
| | - Doris A van Bergeijk
- Department of Microbiology, KU Leuven, Immunology and Transplantation (Laboratory of Molecular Bacteriology), Leuven, Belgium
- VIB, Center for Microbiology, Leuven, Belgium
| | - Somayah S Elsayed
- Molecular Biotechnology, Institute of Biology, Leiden University, Leiden, The Netherlands
| | - Thomas Hankemeier
- Leiden Academic Centre for Drug Research (LACDR), Leiden University, Leiden, The Netherlands
| | - Gilles P van Wezel
- Molecular Biotechnology, Institute of Biology, Leiden University, Leiden, The Netherlands.
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6
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Chappell TC, Maiello KG, Tierney AJ, Yanagi K, Lee JA, Lee K, Mace CR, Bennett CS, Nair NU. Rapid spectrophotometric detection for optimized production of landomycins and characterization of their therapeutic potential. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.07.566088. [PMID: 37986805 PMCID: PMC10659386 DOI: 10.1101/2023.11.07.566088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Microbial derived natural products remain a major source of structurally diverse bioactive compounds and chemical scaffolds that have potential as new therapeutics to target drug resistant pathogens and cancers. In particular, genome mining has revealed the vast number of cryptic or low yield biosynthetic gene clusters in the genus Streptomyces . Here, we describe our efforts to improve yields of landomycins - angucycline family polyketides under investigation as cancer therapeutics - by a genetically modified Streptomyces cyanogenus 136. After simplifying the extraction process from S. cyanogenus cultures, we identified a wavelength at which the major landomycin products absorb in culture extracts, which we used to systematically explore culture medium compositions to improve total landomycin titers. Through correlational analysis, we simplified the culture optimization process by identifying an alternative wavelength at which culture supernatants absorb yet is representative of total landomycin titers. Using the subsequently improved sample throughput, we explored landomycin production during the culturing process to further increase landomycin yield and reduce culture time. Testing the antimicrobial activity of the isolated landomycins, we report broad inhibition of Gram-positive bacteria, inhibition of fungi by landomycinone, and broad landomycin resistance by Gram-negative bacteria that is likely mediated by exclusion of landomycins by the bacterial membrane. Finally, the anticancer activity of the isolated landomycins against A549 lung carcinoma cells agrees with previous reports on other cell lines that glycan chain length correlates with activity. Given the prevalence of natural products produced by Streptomyces , as well as the light-absorbing moieties common to bioactive natural products and their metabolic precursors, our method is relevant to improving the yields of other natural products of interest.
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7
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Liu X, Lin Y, Peng W, Zhang Z, Gao L, Zhou Y, Song Z, Wang Y, Xu P, Yu B, Sun H, Xie W, Li W. Direct Synthesis of 2,6-Dideoxy-β-glycosides and β-Rhamnosides with a Stereodirecting 2-(Diphenylphosphinoyl)acetyl Group. Angew Chem Int Ed Engl 2022; 61:e202206128. [PMID: 35695834 DOI: 10.1002/anie.202206128] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Indexed: 12/11/2022]
Abstract
Anomeric stereocontrol is usually one of the major issues in the synthesis of complex carbohydrates, particularly those involving β-configured 2,6-dideoxyglycoside and d/l-rhamnoside moieties. Herein, we report that 2-(diphenylphosphinoyl)acetyl is highly effective as a remote stereodirecting group in the direct synthesis of these challenging β-glycosides under mild conditions. A deoxy-trisaccharide as a mimic of the sugar chain of landomycin E was prepared stereospecifically in high yield. The synthetic potential was also highlighted in the synthesis of Citrobacter freundii O-antigens composed of a [→4)-α-d-Manp-(1→3)-β-d-Rhap(1→4)-β-d-Rhap-(1→] repeating unit, wherein the convergent assembly up to a nonasaccharide was realized with a strongly β-directing trisaccharide donor. Variable-temperature NMR studies indicate the presence of intermolecular H-bonding between the donor and the bulky acceptor as direct spectral evidence in support of the concept of hydrogen-bond-mediated aglycone delivery.
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Affiliation(s)
- Xianglai Liu
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu 211198, China
| | - Yetong Lin
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu 211198, China
| | - Wenyi Peng
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu 211198, China
| | - Zhaolun Zhang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Longwei Gao
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu 211198, China
| | - Yueer Zhou
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu 211198, China
| | - Zhe Song
- Instrumental Analysis Center, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, Jiangsu 210009, China
| | - Yingjie Wang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Peng Xu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Biao Yu
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, China
| | - Haopeng Sun
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu 211198, China
| | - Weijia Xie
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu 211198, China
| | - Wei Li
- Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, Jiangsu 211198, China
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8
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Liu X, Lin Y, Peng W, Zhang Z, Gao L, Zhou Y, Song Z, Wang Y, Xu P, Yu B, Sun H, Xie W, Li W. Direct Synthesis of 2,6‐Dideoxy‐β‐glycosides and β‐Rhamnosides with a Stereodirecting 2‐(Diphenylphosphinoyl)acetyl Group. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xianglai Liu
- China Pharmaceutical University School of Pharmacy Department of Medicinal Chemistry CHINA
| | - Yetong Lin
- China Pharmaceutical University School of Pharmacy Department of Medicinal Chemistry CHINA
| | - Wenyi Peng
- China Pharmaceutical University School of Pharmacy Department of Medicinal Chemistry CHINA
| | - Zhaolun Zhang
- Shanghai Institute of Organic Chemistry State Key Laboratory of Bioorganic and Natural Products Chemistry CHINA
| | - Longwei Gao
- China Pharmaceutical University School of Pharmacy Department of Medicinal Chemistry CHINA
| | - Yueer Zhou
- China Pharmaceutical University School of Pharmacy Department of Medicinal Chemistry CHINA
| | - Zhe Song
- China Pharmaceutical University Instrumental Analysis Center CHINA
| | - Yingjie Wang
- Shanghai Institute of Organic Chemistry State Key Laboratory of Bioorganic and Natural Products Chemistry CHINA
| | - Peng Xu
- Shanghai Institute of Organic Chemistry State Key Laboratory of Bioorganic and Natural Products Chemistry CHINA
| | - Biao Yu
- Shanghai Institute of Organic Chemistry State Key Laboratory of Bioorganic and Natural Products Chemistry CHINA
| | - Haopeng Sun
- China Pharmaceutical University School of Pharmacy Department of Medicinal Chemistry CHINA
| | - Weijia Xie
- China Pharmaceutical University School of Pharmacy Department of Medicinal Chemistry CHINA
| | - Wei Li
- China Pharmaceutical University School of Pharmacy Department of Medicinal Chemistry 639 Longmian Avenue 211198 Nanjing CHINA
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9
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Zhang Z, In Y, Fukaya K, Yang T, Harunari E, Urabe D, Imada C, Oku N, Igarashi Y. Kumemicinones A-G, Cytotoxic Angucyclinones from a Deep Sea-Derived Actinomycete of the Genus Actinomadura. JOURNAL OF NATURAL PRODUCTS 2022; 85:1098-1108. [PMID: 35343685 DOI: 10.1021/acs.jnatprod.1c01205] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Chemical investigation of the fermentation products of a deep sea water-derived actinomycete, Actinomadura sp. KD439, identified seven new angucyclinones, designated as kumemicinones A-G (1-7), together with the known SF2315B and miaosporone E. NMR and MS spectroscopic analyses, combined with X-ray crystallography and quantum chemical calculations of NMR chemical shifts and electronic circular dichroism (ECD) spectra, uncovered the structures of new angucyclinones as regioisomers of SF2315B at the allyl alcohol unit (1 and 2), an epoxy ring-opened γ-hydroxy enone isomer (3), a B/C-ring-rearranged product (4), or dimers with a new mode of bridging (5-7), adding new structural variation to this antibiotic group. The absolute configuration of SF2315B was also determined by comparison of ECD spectra with those of 1 and 2. All the angucyclinones exhibited cytotoxicity against P388 murine leukemia cells, with IC50 values ranging from 1.8 to 53 μM.
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Affiliation(s)
- Zhiwei Zhang
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Yasuko In
- Department of Physical Chemistry, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, 4-20-1 Nasahara, Takatsuki City, Osaka 569-1094, Japan
| | - Keisuke Fukaya
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Taehui Yang
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7, Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Enjuro Harunari
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Daisuke Urabe
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Chiaki Imada
- Graduate School of Marine Science and Technology, Tokyo University of Marine Science and Technology, 4-5-7, Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Naoya Oku
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Yasuhiro Igarashi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
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10
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Gezer E, Üner G, Küçüksolak M, Kurt MÜ, Doğan G, Kırmızıbayrak PB, Bedir E. Undescribed polyether ionophores from Streptomyces cacaoi and their antibacterial and antiproliferative activities. PHYTOCHEMISTRY 2022; 195:113038. [PMID: 34902703 DOI: 10.1016/j.phytochem.2021.113038] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 11/23/2021] [Accepted: 11/24/2021] [Indexed: 06/14/2023]
Abstract
Polyether ionophores represent a large group of naturally occurring compounds mainly produced by Streptomyces species. With previously proven varieties of bioactivity including antibacterial, antifungal, antiparasitic, antiviral and anti-tumor effects, the discovery of undescribed polyethers leading to development of efficient therapeutics has become important. As part of our research on polyether-rich Streptomyces cacaoi, we previously performed modification studies on fermentation conditions to induce synthesis of specialized metabolites. Here, we report four undescribed and nine known polyether compounds from S. cacaoi grown in optimized conditions. Antimicrobial activity assays revealed that four compounds, including the undescribed (6), showed strong inhibitory effects over both Bacillus subtilis and methicillin-resistant Staphylococcus aureus (MRSA) growth. Additionally, K41-A and its C15-demethoxy derivative exhibited significant cytotoxicity. These results signified that selectivity of C15-demethoxy K41-A towards cancer cells was higher than K41-A, which prompted us to conduct mechanistic experiments. These studies showed that this uninvestigated compound acts as a multitarget compound by inhibiting autophagic flux, inducing reactive oxygen species formation, abolishing proteasome activity, and stimulating ER stress. Consequently, the optimized fermentation conditions of S. cacaoi led to the isolation of undescribed and known polyethers displaying promising activities.
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Affiliation(s)
- Emre Gezer
- Department of Biotechnology and Bioengineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | - Göklem Üner
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | - Melis Küçüksolak
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | - Mustafa Ünver Kurt
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | - Gamze Doğan
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey
| | | | - Erdal Bedir
- Department of Bioengineering, Faculty of Engineering, Izmir Institute of Technology, 35430, Urla, Izmir, Turkey.
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11
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Liu M, Yang YJ, Gong G, Li Z, Zhang L, Guo L, Xu B, Zhang SM, Xie ZP. Angucycline and angucyclinone derivatives from the marine-derived Streptomyces sp. Chirality 2021; 34:421-427. [PMID: 34806785 DOI: 10.1002/chir.23394] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 10/25/2021] [Accepted: 10/28/2021] [Indexed: 11/12/2022]
Abstract
Atramycin C (1), one new angucycline bearing an O-6 rhamnose side chain, along with one new highly hydroxylated angucyclinone emycin G (2), and ten known analogs (3-12) were isolated from the marine-derived Streptomyces sp. strain BHB-032. Their structures were assigned by spectroscopic analysis and comparison with literature data. The absolute configuration of the sugar unit of 1 was assigned as 6-O-α-l-rhamnoside, based on the analysis of the coupling constants and chemical derivatization, whereas the absolute configuration of 2 was determined by X-ray diffraction. Furthermore, the stereochemistry of saccharothrixin A (3) and SNA-8073-A (4) was established unequivocally by X-ray crystallography for the first time. Compounds 1 and 2 exhibited moderate antimicrobial activities with minimum inhibitory concentration (MIC) values ranging from 16 to 64 μg/ml.
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Affiliation(s)
- Ming Liu
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | | | - Ge Gong
- College of Life Sciences, Yantai University, Yantai, China
| | - Zhi Li
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Lu Zhang
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Lin Guo
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Bo Xu
- College of Life Sciences, Yantai University, Yantai, China
| | - Shu-Min Zhang
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Ze-Ping Xie
- School of Pharmacy, Binzhou Medical University, Yantai, China
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12
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Guo L, Yang Q, Wang G, Zhang S, Liu M, Pan X, Pescitelli G, Xie Z. Ring D-Modified and Highly Reduced Angucyclinones From Marine Sediment-Derived Streptomyces sp. Front Chem 2021; 9:756962. [PMID: 34712650 PMCID: PMC8546756 DOI: 10.3389/fchem.2021.756962] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 09/02/2021] [Indexed: 11/28/2022] Open
Abstract
Angucyclines and angucyclinones represent the largest family of type II PKS-engineered natural products. Chemical analysis of a marine Streptomyces sp. KCB-132 yielded three new members, actetrophenone A (1) and actetrophenols A–B (2–3). Their structures were elucidated by NMR spectroscopy, X-ray crystallography and CD calculations. Actetrophenone A (1) is the first representative of a novel-type angucyclinone bearing a nonaromatic D-ring. Actetrophenol A (2) features a highly reduced and aromatized four-ring system, which is unprecedented for natural products. While (Ra)- and (Sa)-actetrophenol B (3) bear an unprecedented N-acetyltryptamine-substituted tetraphene core skeleton, this is the first report of a pair of atropisomeric isomers in the angucyclinone family. Actetrophenol A (2) exhibits remarkable antibiotic activity, notably including potent activity to multiple resistant Staphylococcus aureus and Enterococcus faecium with MIC values of 4 μg/ml, in contrast, the positive control antimicrobial agent penicillin was inactive up to 32 μg/ml.
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Affiliation(s)
- Lin Guo
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Qiaoli Yang
- College of Life Sciences, Yantai University, Yantai, China
| | - Guangfei Wang
- College of Life Sciences, Yantai University, Yantai, China
| | - Shumin Zhang
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Ming Liu
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Xiaohong Pan
- School of Pharmacy, Binzhou Medical University, Yantai, China
| | - Gennaro Pescitelli
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Pisa, Italy
| | - Zeping Xie
- School of Pharmacy, Binzhou Medical University, Yantai, China
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13
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Zhang Y, Cheema MT, Ponomareva LV, Ye Q, Liu T, Sajid I, Rohr J, She QB, Voss SR, Thorson JS, Shaaban KA. Himalaquinones A-G, Angucyclinone-Derived Metabolites Produced by the Himalayan Isolate Streptomyces sp. PU-MM59. JOURNAL OF NATURAL PRODUCTS 2021; 84:1930-1940. [PMID: 34170698 PMCID: PMC8565601 DOI: 10.1021/acs.jnatprod.1c00192] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Himalaquinones A-G, seven new anthraquinone-derived metabolites, were obtained from the Himalayan-based Streptomyces sp. PU-MM59. The chemical structures of the new compounds were identified based on cumulative analyses of HRESIMS and NMR spectra. Himalaquinones A-F were determined to be unique anthraquinones that contained unusual C-4a 3-methylbut-3-enoic acid aromatic substitutions, while himalaquinone G was identified as a new 5,6-dihydrodiol-bearing angucyclinone. Comparative bioactivity assessment (antimicrobial, cancer cell line cytotoxicity, impact on 4E-BP1 phosphorylation, and effect on axolotl embryo tail regeneration) revealed cytotoxic landomycin and saquayamycin analogues to inhibit 4E-BP1p and inhibit regeneration. In contrast, himalaquinone G, while also cytotoxic and a regeneration inhibitor, did not affect 4E-BP1p status at the doses tested. As such, this work implicates a unique mechanism for himalaquinone G and possibly other 5,6-dihydrodiol-bearing angucyclinones.
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Affiliation(s)
- Yongyong Zhang
- Department of Pharmacy, College of Life Sciences, China Jiliang University, Hangzhou 310018, People's Republic of China
| | - Mohsin T Cheema
- Institute of Microbiology and Molecular Genetics (MMG), University of the Punjab, Lahore 54590, Pakistan
| | | | - Qing Ye
- Markey Cancer Center, Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
| | - Tao Liu
- Department of Natural Products Chemistry, School of Pharmacy, China Medical University, Shenyang 110122, People's Republic of China
| | - Imran Sajid
- Institute of Microbiology and Molecular Genetics (MMG), University of the Punjab, Lahore 54590, Pakistan
| | | | - Qing-Bai She
- Markey Cancer Center, Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, Kentucky 40536, United States
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14
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Assad BM, Savi DC, Biscaia SMP, Mayrhofer BF, Iantas J, Mews M, de Oliveira JC, Trindade ES, Glienke C. Endophytic actinobacteria of Hymenachne amplexicaulis from the Brazilian Pantanal wetland produce compounds with antibacterial and antitumor activities. Microbiol Res 2021; 248:126768. [PMID: 33873141 DOI: 10.1016/j.micres.2021.126768] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 02/28/2021] [Accepted: 04/03/2021] [Indexed: 12/24/2022]
Abstract
The increase in the number of deaths from infections caused by multidrug-resistant bacteria and cancer diseases highlights the need for new molecules with biological activity. Actinobacteria represent a potential source of new compounds, as these microorganisms have already produced a great diversity of clinically employed antibiotics. Endophytes from unexplored biomes, such as the Pantanal (the largest wetland in the world), can be a source of new molecules. Hymenachne amplexicaulis is among the unexplored native plants of the Pantanal in terms of its endophytic community. This plant is considered a weed in other countries due to its ability to adapt and compete with native plants, and there is evidence to suggest that the endophytic community of H. amplexicaulis plays an important role in this competitiveness. To explore its therapeutic potential, the present study isolated, identified (using partial sequence of the 16S rDNA) and bioprospected H. amplexicaulis endophytic actinobacteria. Ten isolates belonging to the genera Streptomyces, Microbispora, Leifsonia, and Verrucosispora were obtained from root fragments. The susceptibility profile of the isolates to the different classes of antibiotics was evaluated, with 80 % of the isolates showing resistance to the antibiotics Nalidixic Acid, Ampicillin, Chloramphenicol, Oxacillin, and Rifampicin. To assess antibacterial and antitumor activities, methanolic extracts were obtained by fermentation in SG culture medium at 36 °C at 180 rpm for 10 days. The extract produced from the S. albidoflavus CMRP4854 isolate was the only one to show activity against the Gram-negative bacterium Acinetobacter baumanii. Due to the great clinical importance of this pathogen and the difficulty in obtaining active compounds against it, the CMRP4854 isolate should be further investigated for the identification of active compounds and mode of action. We also emphasize the results obtained by the extract of the isolates Streptomyces albidoflavus CMRP4852 and Verrucosispora sp. CMRP4860 that presented antibacterial effect against Methicilin-resistant Staphylococcus aureus (MRSA) (MIC: 1.5 μg/mL and 13 μg/mL, respectively) and Vancomycin-resistant Enterococcus (VRE) (MIC: 40 μg/mL for both extracts). Extracts (200 μg/mL) of these two endophytes also showed selective cytotoxicity action against murine B16-F10 melanoma cells. However, the CMRP4852 extract also affected the density of normal cells. Due to these results, the crude extract of isolate CMRP4860 Verrucosispora sp., which was the only one that presented cytotoxicity and reduced cell density only in tumor cells, was selected for subsequent analysis involving scale-up fermentation of the CMRP4860 resulting in 9 fractions that were tested against both bacteria and tumor cells, with particular fractions showing promise and meriting further investigation. Taken together, the results of this study not only show for the first time that the endophytic community of H. amplexicaulis actinobacteria can produce secondary metabolites that potentially possess important antibacterial and cytotoxic properties, but also reinforce the pressing need to conserve biomes such as the Brazilian Pantanal.
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Affiliation(s)
- Beatriz M Assad
- Postgraduate Program in Genetics, Department of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná State, Brazil
| | - Daiani C Savi
- Postgraduate Program in Genetics, Department of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná State, Brazil; University Center - Católica de Santa Catarina, Joinville, SC, Brazil
| | - Stellee M P Biscaia
- Postgraduate Program in Cell and Molecular Biology, Department of Cellular Biology, Federal University of Parana, Av. Coronel Francisco Heráclito dos Santos, 100. CEP, 81531-970, Curitiba, PR, Brazil
| | - Bárbara F Mayrhofer
- Postgraduate Program in Microbiology, Department of Pathology, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná State, Brazil
| | - Jucelia Iantas
- Postgraduate Program in Microbiology, Department of Pathology, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná State, Brazil
| | - Mathias Mews
- Postgraduate Program in Genetics, Department of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná State, Brazil
| | - Jaqueline C de Oliveira
- Postgraduate Program in Genetics, Department of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná State, Brazil
| | - Edvaldo S Trindade
- Postgraduate Program in Cell and Molecular Biology, Department of Cellular Biology, Federal University of Parana, Av. Coronel Francisco Heráclito dos Santos, 100. CEP, 81531-970, Curitiba, PR, Brazil
| | - Chirlei Glienke
- Postgraduate Program in Genetics, Department of Genetics, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná State, Brazil; Postgraduate Program in Microbiology, Department of Pathology, Federal University of Paraná (UFPR), Centro Politécnico, Jardim das Américas, 81531-990, Curitiba, Paraná State, Brazil.
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15
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Lai YH, Mondal S, Su HT, Huang SC, Wu MH, Huang IW, Yang Lauderdale TL, Song JS, Shia KS, Mong KKT. Total synthesis of landomycins Q and R and related core structures for exploration of the cytotoxicity and antibacterial properties. RSC Adv 2021; 11:9426-9432. [PMID: 35423459 PMCID: PMC8695357 DOI: 10.1039/d1ra01088c] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 02/23/2021] [Indexed: 12/27/2022] Open
Abstract
Herein, we report the total synthesis of landomycins Q and R as well as the aglycone core, namely anhydrolandomycinone and a related core analogue. The synthesis features an acetate-assisted arylation method for construction of the hindered B-ring in the core component and a one-pot aromatization-deiodination-denbenzylation procedure to streamline the global functional and protecting group manuipulation. Subsequent cytotoxicity and antibacterial studies revealed that the landomycin R is a potential antibacterial agent against methicillin-resistant Staphylococcus aureus.
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Affiliation(s)
- Yao-Hsuan Lai
- National Chiao Tung University Hsinchu 30010 Taiwan Republic of China
| | - Soumik Mondal
- National Chiao Tung University Hsinchu 30010 Taiwan Republic of China
- National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan Republic of China
| | - Hsin-Tzu Su
- National Chiao Tung University Hsinchu 30010 Taiwan Republic of China
- National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan Republic of China
| | - Sheng-Cih Huang
- National Chiao Tung University Hsinchu 30010 Taiwan Republic of China
- National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan Republic of China
| | - Mine-Hsine Wu
- National Health Research Institutes Miaoli County 35053 Taiwan Republic of China
| | - I-Wen Huang
- National Health Research Institutes Miaoli County 35053 Taiwan Republic of China
| | | | - Jen-Shin Song
- National Health Research Institutes Miaoli County 35053 Taiwan Republic of China
| | - Kak-Shan Shia
- National Health Research Institutes Miaoli County 35053 Taiwan Republic of China
| | - Kwok-Kong Tony Mong
- National Chiao Tung University Hsinchu 30010 Taiwan Republic of China
- National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan Republic of China
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16
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Mrudulakumari Vasudevan U, Lee EY. Flavonoids, terpenoids, and polyketide antibiotics: Role of glycosylation and biocatalytic tactics in engineering glycosylation. Biotechnol Adv 2020; 41:107550. [PMID: 32360984 DOI: 10.1016/j.biotechadv.2020.107550] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/19/2020] [Accepted: 04/24/2020] [Indexed: 02/07/2023]
Abstract
Flavonoids, terpenoids, and polyketides are structurally diverse secondary metabolites used widely as pharmaceuticals and nutraceuticals. Most of these molecules exist in nature as glycosides, in which sugar residues act as a decisive factor in their architectural complexity and bioactivity. Engineering glycosylation through selective trimming or extension of the sugar residues in these molecules is a prerequisite to their commercial production as well to creating novel derivatives with specialized functions. Traditional chemical glycosylation methods are tedious and can offer only limited end-product diversity. New in vitro and in vivo biocatalytic tools have emerged as outstanding platforms for engineering glycosylation in these three classes of secondary metabolites to create a large repertoire of versatile glycoprofiles. As knowledge has increased about secondary metabolite-associated promiscuous glycosyltransferases and sugar biosynthetic machinery, along with phenomenal progress in combinatorial biosynthesis, reliable industrial production of unnatural secondary metabolites has gained momentum in recent years. This review highlights the significant role of sugar residues in naturally occurring flavonoids, terpenoids, and polyketide antibiotics. General biocatalytic tools used to alter the identity and pattern of sugar molecules are described, followed by a detailed illustration of diverse strategies used in the past decade to engineer glycosylation of these valuable metabolites, exemplified with commercialized products and patents. By addressing the challenges involved in current bio catalytic methods and considering the perspectives portrayed in this review, exceptional drugs, flavors, and aromas from these small molecules could come to dominate the natural-product industry.
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Affiliation(s)
| | - Eun Yeol Lee
- Department of Chemical Engineering, Kyung Hee University, Yongin-si, Gyeonggi-do 17104, Republic of Korea.
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17
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Flexible Total Synthesis of 11‐Deoxylandomycins and Their Non‐Natural Analogues by Way of Asymmetric Metal Catalysis. Angew Chem Int Ed Engl 2020; 59:2349-2353. [DOI: 10.1002/anie.201913706] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Indexed: 11/07/2022]
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18
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Lee J, Kang J, Lee S, Rhee YH. Flexible Total Synthesis of 11‐Deoxylandomycins and Their Non‐Natural Analogues by Way of Asymmetric Metal Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201913706] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Juyeol Lee
- Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
| | - Jihun Kang
- Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
| | - Sukhyun Lee
- Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
| | - Young Ho Rhee
- Department of ChemistryPohang University of Science and Technology (POSTECH) Pohang 37673 Republic of Korea
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19
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Mo J, Ye J, Chen H, Hou B, Wu H, Zhang H. Cloning and identification of the Frigocyclinone biosynthetic gene cluster from Streptomyces griseus strain NTK 97. Biosci Biotechnol Biochem 2019; 83:2082-2089. [PMID: 31303144 DOI: 10.1080/09168451.2019.1638755] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
Abstract
Frigocyclinone is a novel antibiotic with antibacterial and anticancer activities. It is produced by both Antarctica-derived Streptomyces griseus NTK 97 and marine sponge-associated Streptomyces sp. M7_15. Here, we first report the biosynthetic gene cluster of frigocyclinone in the S. griseus NTK 97. The frigocyclinone gene cluster spans a DNA region of 33-kb which consists of 30 open reading frames (ORFs), encoding minimal type II polyketide synthase, aromatase and cyclase, redox tailoring enzymes, sugar biosynthesis-related enzymes, C-glycosyltransferase, a resistance protein, and three regulatory proteins. Based on the bioinformatic analysis, a biosynthetic pathway for frigocyclinone was proposed. Second, to verify the cloned gene cluster, CRISPR-Cpf1 mediated gene disruption was conducted. Mutant with the disruption of beta-ketoacyl synthase encoding gene frig20 fully loses the ability of producing frigocyclinone, while inactivating the glycosyltransferase gene frig1 leads to the production of key intermediate of anti-MRSA anthraquinone tetrangomycin.
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Affiliation(s)
- Jian Mo
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , Shanghai , China.,Department of Applied Biology, East China University of Science and Technology , Shanghai , China
| | - Jiang Ye
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , Shanghai , China.,Department of Applied Biology, East China University of Science and Technology , Shanghai , China
| | - Haozhe Chen
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , Shanghai , China.,Department of Applied Biology, East China University of Science and Technology , Shanghai , China
| | - Bingbing Hou
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , Shanghai , China.,Department of Applied Biology, East China University of Science and Technology , Shanghai , China
| | - Haizhen Wu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , Shanghai , China.,Department of Applied Biology, East China University of Science and Technology , Shanghai , China
| | - Huizhan Zhang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , Shanghai , China.,Department of Applied Biology, East China University of Science and Technology , Shanghai , China
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20
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Wang Z, Dong W, Sun B, Yu Q, Zhang FL. Cascade reaction for the synthesis of polycyclic aromatic hydrocarbons via transient directing group strategy. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.06.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Savi DC, Shaaban KA, Gos FMW, Thorson JS, Glienke C, Rohr J. Secondary metabolites produced by Microbacterium sp. LGMB471 with antifungal activity against the phytopathogen Phyllosticta citricarpa. Folia Microbiol (Praha) 2019; 64:453-460. [PMID: 30565048 PMCID: PMC6531336 DOI: 10.1007/s12223-018-00668-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 11/27/2018] [Indexed: 11/29/2022]
Abstract
The citrus black spot (CBS), caused by Phyllosticta citricarpa, is one of the most important citrus diseases in subtropical regions of Africa, Asia, Oceania, and the Americas, and fruits with CBS lesions are still subject to quarantine regulations in the European Union. Despite the high application of fungicides, the disease remains present in the citrus crops of Central and South America. In order to find alternatives to help control CBS and reduce the use of fungicides, we explored the antifungal potential of endophytic actinomycetes isolated from the Brazilian medicinal plant Vochysia divergens found in the Pantanal biome. Two different culture media and temperatures were selected to identify the most efficient conditions for the production of active secondary metabolites. The metabolites produced by strain Microbacterium sp. LGMB471 cultured in SG medium at 36 °C considerably inhibited the development of P. citricarpa. Three isoflavones and five diketopiperazines were identified, and the compounds 7-O-β-D-glucosyl-genistein and 7-O-β-D-glucosyl-daidzein showed high activity against P. citricarpa, with the MIC of 33 μg/mL and inhibited the production of asexual spores of P. citricarpa on leaves and citrus fruits. Compounds that inhibit conidia formation may be a promising alternative to reduce the use of fungicides in the control of CBS lesions, especially in regions where sexual reproduction does not occur, as in the USA. Our data suggest the use of Microbacterium sp. LGMB471 or its metabolites as an ecological alternative to be used in association with the fungicides for the control of CBS disease.
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Affiliation(s)
- Daiani Cristina Savi
- Department of Genetics, Federal University of Paraná, Box 19031, Curitiba, PR, 81531-990, Brazil.
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536-0596, USA.
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536-0596, USA
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Francielly M W Gos
- Department of Basic Pathology, Federal University of Paraná, Curitiba, Brazil
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536-0596, USA
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Chirlei Glienke
- Department of Genetics, Federal University of Paraná, Box 19031, Curitiba, PR, 81531-990, Brazil.
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536-0596, USA.
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22
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A Novel Nanoconjugate of Landomycin A with C 60 Fullerene for Cancer Targeted Therapy: In Vitro Studies. Cell Mol Bioeng 2018; 12:41-51. [PMID: 31719898 DOI: 10.1007/s12195-018-0548-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 08/07/2018] [Indexed: 01/14/2023] Open
Abstract
Introduction Landomycins are a subgroup of angucycline antibiotics that are produced by Streptomyces bacteria and possess strong antineoplastic potential. Literature data suggest that enhancement of the therapeutic activity of this drug may be achieved by means of creating specific drug delivery systems. Here we propose to adopt C60 fullerene as flexible and stable nanocarrier for landomycin delivery into tumor cells. Methods The methods of molecular modelling, dynamic light scattering and Fourier transform infrared spectroscopy were used to study the assembly of C60 fullerene and the anticancer drug Landomycin A (LA) in aqueous solution. Cytotoxic activity of this nanocomplex was studied in vitro towards two cancer cell lines in comparison to human mesenchymal stem cells (hMSCs) using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) test and a live/dead assay. The morphology of the cells incubated with fullerene-drug nanoparticles and their uptake into target cells were studied by scanning electron microscopy and fluorescence light microscopy. Results The viability of primary cells (hMSCs, as a model for healthy cells) and cancer cell lines (human osteosarcoma cells, MG-63, and mouse mammary cells, 4T1, as models for cancer cells) was studied after incubation with water-soluble C60 fullerenes, LA and the mixture C60 + LA. The C60 + LA nanocomplex in contrast to LA alone showed higher toxicity towards cancer cells and lower toxicity towards normal cells, whereas the water-soluble C60 fullerenes at the same concentration were not toxic for the cells. Conclusions The obtained physico-chemical data indicate a complexation between the two compounds, leading to the formation of a C60 + LA nanocomposite. It was concluded that immobilization of LA on C60 fullerene enhances selectivity of action of this anticancer drug in vitro, indicating on possibility of further preclinical studies of novel C60 + LA nanocomposites on animal tumor models.
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23
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Gos FMWR, Savi DC, Shaaban KA, Thorson JS, Aluizio R, Possiede YM, Rohr J, Glienke C. Antibacterial Activity of Endophytic Actinomycetes Isolated from the Medicinal Plant Vochysia divergens (Pantanal, Brazil). Front Microbiol 2017; 8:1642. [PMID: 28932210 PMCID: PMC5592219 DOI: 10.3389/fmicb.2017.01642] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 08/14/2017] [Indexed: 12/17/2022] Open
Abstract
Endophytic actinomycetes from medicinal plants produce a wide diversity of secondary metabolites (SM). However, to date, the knowledge about endophytes from Brazil remains scarce. Thus, we analyzed the antimicrobial potential of 10 actinomycetes isolated from the medicinal plant Vochysia divergens located in the Pantanal sul-mato-grossense, an unexplored wetland in Brazil. Strains were classified as belonging to the Aeromicrobium, Actinomadura, Microbacterium, Microbispora, Micrococcus, Sphaerisporangium, Streptomyces, and Williamsia genera, through morphological and 16S rRNA phylogenetic analyzes. A susceptibility analysis demonstrated that the strains were largely resistant to the antibiotics oxacillin and nalidixic acid. Additionally, different culture media (SG and R5A), and temperatures (28 and 36°C) were evaluated to select the best culture conditions to produce the active SM. All conditions were analyzed for active metabolites, and the best antibacterial activity was observed from metabolites produced with SG medium at 36°C. The LGMB491 (close related to Aeromicrobium ponti) extract showed the highest activity against methicillin-resistant Staphylococcus aureus (MRSA), with a MIC of 0.04 mg/mL, and it was selected for SM identification. Strain LGMB491 produced 1-acetyl-β-carboline (1), indole-3-carbaldehyde (2), 3-(hydroxyacetyl)-indole (4), brevianamide F (5), and cyclo-(L-Pro-L-Phe) (6) as major compounds with antibacterial activity. In this study, we add to the knowledge about the endophytic community from the medicinal plant V. divergens and report the isolation of rare actinomycetes that produce highly active metabolites.
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Affiliation(s)
| | - Daiani C. Savi
- Department of Genetics, Federal University of ParanáCuritiba, Brazil
| | - Khaled A. Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of KentuckyLexington, KY, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of KentuckyLexington, KY, United States
| | - Jon S. Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of KentuckyLexington, KY, United States
- Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of KentuckyLexington, KY, United States
| | - Rodrigo Aluizio
- Department of Genetics, Federal University of ParanáCuritiba, Brazil
| | - Yvelise M. Possiede
- Department of Biology, Federal University of Mato Grosso do SulCampo Grande, Brazil
| | - Jürgen Rohr
- Department of Pharmaceutical Sciences, College of Pharmacy, University of KentuckyLexington, KY, United States
| | - Chirlei Glienke
- Department of Genetics, Federal University of ParanáCuritiba, Brazil
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Iodosobenzene diacetate-Iodine and IBX-Iodine: Reagent systems for the synthesis of diastereomerically enriched 2-deoxy-2-iodoglycosyl acetates and 2-deoxy-2-iodoglycosyl ortho-iodobenzoates from protected glycals. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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25
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Panchuk RR, Lehka LV, Terenzi A, Matselyukh BP, Rohr J, Jha AK, Downey T, Kril IJ, Herbacek I, van Schoonhoven S, Heffeter P, Stoika RS, Berger W. Rapid generation of hydrogen peroxide contributes to the complex cell death induction by the angucycline antibiotic landomycin E. Free Radic Biol Med 2017; 106:134-147. [PMID: 28189848 PMCID: PMC5552372 DOI: 10.1016/j.freeradbiomed.2017.02.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 02/06/2017] [Accepted: 02/08/2017] [Indexed: 01/14/2023]
Abstract
Landomycin E (LE) is an angucycline antibiotic produced by Streptomyces globisporus. Previously, we have shown a broad anticancer activity of LE which is, in contrast to the structurally related and clinically used anthracycline doxorubicin (Dx), only mildly affected by multidrug resistance-mediated drug efflux. In the present study, cellular and molecular mechanisms underlying the anticancer activity of landomycin E towards Jurkat T-cell leukemia cells were dissected focusing on the involvement of radical oxygen species (ROS). LE-induced apoptosis distinctly differed in several aspects from the one induced by Dx. Rapid generation of both extracellular and cell-derived hydrogen peroxide already at one hour drug exposure was observed in case of LE but not found before 24h for Dx. In contrast, Dx but not LE induced production of superoxide radicals. Mitochondrial damage, as revealed by JC-1 staining, was weakly enhanced already at 3h LE treatment and increased significantly with time. Accordingly, activation of the intrinsic apoptosis pathway initiator caspase-9 was not detectable before 12h exposure. In contrast, cleavage of the down-stream caspase substrate PARP-1 was clearly induced already at the three hour time point. Out of all caspases tested, only activation of effector caspase-7 was induced at this early time points paralleling the LE-induced oxidative burst. Accordingly, this massive cleavage of caspase-7 at early time points was inhibitable by the radical scavenger N-acetylcysteine (NAC). Additionally, only simultaneous inhibition of multiple caspases reduced LE-induced apoptosis. Specific scavengers of both H2O2 and OH• effectively decreased LE-induced ROS production, but only partially inhibited LE-induced apoptosis. In contrast, NAC efficiently blocked both parameters. Summarizing, rapid H2O2 generation and a complex caspase activation pattern contribute to the antileukemic effects of LE. As superoxide generation is considered as the main cardiotoxic mechanism of Dx, LE might represent a better tolerable drug candidate for further (pre)clinical development.
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Affiliation(s)
| | - Lilya V Lehka
- Institute of Cell Biology NAS of Ukraine, Lviv, Ukraine
| | - Alessio Terenzi
- Institute of Inorganic Chemistry, University of Vienna, Vienna, Austria
| | - Bohdan P Matselyukh
- D.K. Zabolotny Institute of Microbiology and Virology NAS of Ukraine, Lviv, Ukaine
| | - Jürgen Rohr
- University of Kentucky, College of Pharmacy, Lexington, USA
| | - Amit K Jha
- University of Kentucky, College of Pharmacy, Lexington, USA
| | - Theresa Downey
- University of Kentucky, College of Pharmacy, Lexington, USA
| | - Iryna J Kril
- Danylo Halytsky Lviv National Medical University, Lviv, Ukraine
| | - Irene Herbacek
- Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Sushilla van Schoonhoven
- Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | - Petra Heffeter
- Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria
| | | | - Walter Berger
- Institute of Cancer Research and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria.
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Zhang W, Luo X, Wang Z, Zhang J. One-pot synthesis of β-2,6-dideoxyglycosides via glycosyl iodide intermediates. J Carbohydr Chem 2016. [DOI: 10.1080/07328303.2016.1239729] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Wan Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China
| | - Xiaosheng Luo
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China
| | - Zhongfu Wang
- School of Life Sciences, Northwestern University, Xi'an, China
| | - Jianbo Zhang
- School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, China
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Özakin S, Davis RW, Umile TP, Pirinccioglu N, Kizil M, Celik G, Sen A, Minbiole KPC, İnce E. The isolation of tetrangomycin from terrestrial Streptomyces sp. CAH29: evaluation of antioxidant, anticancer, and anti-MRSA activity. Med Chem Res 2016. [DOI: 10.1007/s00044-016-1708-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2022]
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Li X, Woodward J, Hourani A, Zhu D, Ayoub S, Zhu J. Synthesis of the 2-deoxy trisaccharide glycal of antitumor antibiotics landomycins A and E. Carbohydr Res 2016; 430:54-58. [DOI: 10.1016/j.carres.2016.04.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 04/24/2016] [Accepted: 04/30/2016] [Indexed: 01/03/2023]
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Ruei JH, Venukumar P, Ingle AB, Mong KKT. C6 picoloyl protection: a remote stereodirecting group for 2-deoxy-β-glycoside formation. Chem Commun (Camb) 2016; 51:5394-7. [PMID: 25470411 DOI: 10.1039/c4cc08465a] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We reported a remote control glycosylation method using the picoloyl protecting group for 2-deoxy-β-glycosidic bond formation. The method is applicable to various 2-deoxythioglycosyl donors and the utility is illustrated by the synthesis of a deoxytrisaccharide component of landomycins.
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Affiliation(s)
- Jyh-Herng Ruei
- Applied Chemistry Department, National Chiao Tung University (NCTU), 1001 Ta Hsueh Road, Taiwan.
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30
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Elshahawi SI, Shaaban KA, Kharel MK, Thorson JS. A comprehensive review of glycosylated bacterial natural products. Chem Soc Rev 2015; 44:7591-697. [PMID: 25735878 PMCID: PMC4560691 DOI: 10.1039/c4cs00426d] [Citation(s) in RCA: 299] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A systematic analysis of all naturally-occurring glycosylated bacterial secondary metabolites reported in the scientific literature up through early 2013 is presented. This comprehensive analysis of 15 940 bacterial natural products revealed 3426 glycosides containing 344 distinct appended carbohydrates and highlights a range of unique opportunities for future biosynthetic study and glycodiversification efforts.
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Affiliation(s)
- Sherif I Elshahawi
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA. and Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Khaled A Shaaban
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA. and Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Madan K Kharel
- School of Pharmacy, University of Maryland Eastern Shore, Princess Anne, Maryland, USA
| | - Jon S Thorson
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA. and Center for Pharmaceutical Research and Innovation, College of Pharmacy, University of Kentucky, Lexington, KY, USA
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31
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Baryal KN, Zhu J. Stereoselective Synthesis of S-Linked Hexasaccharide of Landomycin A via Umpolung S-Glycosylation. Org Lett 2015; 17:4530-3. [DOI: 10.1021/acs.orglett.5b02223] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Kedar N. Baryal
- Department
of Chemistry and
Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
| | - Jianglong Zhu
- Department
of Chemistry and
Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 West Bancroft Street, Toledo, Ohio 43606, United States
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32
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Zhou Z, Xu Q, Bu Q, Guo Y, Liu S, Liu Y, Du Y, Li Y. Genome mining-directed activation of a silent angucycline biosynthetic gene cluster in Streptomyces chattanoogensis. Chembiochem 2014; 16:496-502. [PMID: 25511454 DOI: 10.1002/cbic.201402577] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2014] [Indexed: 01/01/2023]
Abstract
Genomic sequencing of actinomycetes has revealed the presence of numerous gene clusters seemingly capable of natural product biosynthesis, yet most clusters are cryptic under laboratory conditions. Bioinformatics analysis of the completely sequenced genome of Streptomyces chattanoogensis L10 (CGMCC 2644) revealed a silent angucycline biosynthetic gene cluster. The overexpression of a pathway-specific activator gene under the constitutive ermE* promoter successfully triggered the expression of the angucycline biosynthetic genes. Two novel members of the angucycline antibiotic family, chattamycins A and B, were further isolated and elucidated. Biological activity assays demonstrated that chattamycin B possesses good antitumor activities against human cancer cell lines and moderate antibacterial activities. The results presented here provide a feasible method to activate silent angucycline biosynthetic gene clusters to discover potential new drug leads.
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Affiliation(s)
- Zhenxing Zhou
- Institute of Biochemistry, College of Life Sciences, Zhejiang University, Zijingang Campus, 388 Yuhangtang Road, Hangzhou 310058 (China)
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Brötz E, Bilyk O, Kröger S, Paululat T, Bechthold A, Luzhetskyy A. Amycomycins C and D, new angucyclines from Kitasatospora sp. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.08.106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Grkovic T, Abdelmohsen UR, Othman EM, Stopper H, Edrada-Ebel R, Hentschel U, Quinn RJ. Two new antioxidant actinosporin analogues from the calcium alginate beads culture of sponge-associated Actinokineospora sp. strain EG49. Bioorg Med Chem Lett 2014; 24:5089-92. [PMID: 25266784 DOI: 10.1016/j.bmcl.2014.08.068] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 08/25/2014] [Accepted: 08/29/2014] [Indexed: 10/24/2022]
Abstract
Marine sponge-associated actinomycetes represent an exciting new resource for the identification of new and novel natural products . Previously, we have reported the isolation and structural elucidation of actinosporins A (1) and B (2) from Actinokineospora sp. strain EG49 isolated from the marine sponge Spheciospongia vagabunda. Herein, by employing different fermentation conditions on the same microorganism, we report on the isolation and antioxidant activity of structurally related metabolites, actinosporins C (3) and D (4). The antioxidant potential of actinosporins C and D was demonstrated using the ferric reducing antioxidant power (FRAP) assay. Additionally, at 1.25 μM, actinosporins C and D showed a significant antioxidant and protective capacity from the genomic damage induced by hydrogen peroxide in the human promyelocytic (HL-60) cell line.
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Affiliation(s)
- Tanja Grkovic
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| | - Usama Ramadan Abdelmohsen
- Department of Botany II, Julius-von-Sachs Institute for Biological Sciences, University of Würzburg, Julius-von-Sachs-Platz 3, D-97082 Würzburg, Germany
| | | | - Helga Stopper
- Department of Toxicology, University of Würzburg, Würzburg, Germany
| | - RuAngelie Edrada-Ebel
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, The John Arbuthnott Building, 161 Cathedral Street, Glasgow G4 0NR, UK
| | - Ute Hentschel
- Department of Botany II, Julius-von-Sachs Institute for Biological Sciences, University of Würzburg, Julius-von-Sachs-Platz 3, D-97082 Würzburg, Germany
| | - Ronald J Quinn
- Eskitis Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia.
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Abdelmohsen UR, Cheng C, Viegelmann C, Zhang T, Grkovic T, Ahmed S, Quinn RJ, Hentschel U, Edrada-Ebel R. Dereplication strategies for targeted isolation of new antitrypanosomal actinosporins A and B from a marine sponge associated-Actinokineospora sp. EG49. Mar Drugs 2014; 12:1220-44. [PMID: 24663112 PMCID: PMC3967206 DOI: 10.3390/md12031220] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 01/22/2014] [Accepted: 02/08/2014] [Indexed: 12/14/2022] Open
Abstract
High resolution Fourier transform mass spectrometry (HRFTMS) and nuclear magnetic resonance (NMR) spectroscopy were employed as complementary metabolomic tools to dereplicate the chemical profile of the new and antitrypanosomally active sponge-associated bacterium Actinokineospora sp. EG49 extract. Principal Component (PCA), hierarchical clustering (HCA), and orthogonal partial least square-discriminant analysis (OPLS-DA) were used to evaluate the HRFTMS and NMR data of crude extracts from four different fermentation approaches. Statistical analysis identified the best culture one-strain-many-compounds (OSMAC) condition and extraction procedure, which was used for the isolation of novel bioactive metabolites. As a result, two new O-glycosylated angucyclines, named actinosporins A (1) and B (2), were isolated from the broth culture of Actinokineospora sp. strain EG49, which was cultivated from the Red Sea sponge Spheciospongia vagabunda. The structures of actinosporins A and B were determined by 1D- and 2D-NMR techniques, as well as high resolution tandem mass spectrometry. Testing for antiparasitic properties showed that actinosporin A exhibited activity against Trypanosoma brucei brucei with an IC₅₀ value of 15 µM; however no activity was detected against Leishmania major and Plasmodium falciparum, therefore suggesting its selectivity against the parasite Trypanosoma brucei brucei; the causative agent of sleeping sickness.
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Affiliation(s)
- Usama Ramadan Abdelmohsen
- Department of Botany II, Julius-von-Sachs Institute for Biological Sciences, University of Würzburg, Julius-von-Sachs-Platz 3, Würzburg D-97082, Germany.
| | - Cheng Cheng
- Department of Botany II, Julius-von-Sachs Institute for Biological Sciences, University of Würzburg, Julius-von-Sachs-Platz 3, Würzburg D-97082, Germany.
| | - Christina Viegelmann
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, The John Arbuthnott Building, 161 Cathedral Street, Glasgow G4 0NR, UK.
| | - Tong Zhang
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, The John Arbuthnott Building, 161 Cathedral Street, Glasgow G4 0NR, UK.
| | - Tanja Grkovic
- Eskitis Institute, Griffith University, Brisbane, QLD 4111, Australia.
| | - Safwat Ahmed
- Department of Pharmacognosy, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt.
| | - Ronald J Quinn
- Eskitis Institute, Griffith University, Brisbane, QLD 4111, Australia.
| | - Ute Hentschel
- Department of Botany II, Julius-von-Sachs Institute for Biological Sciences, University of Würzburg, Julius-von-Sachs-Platz 3, Würzburg D-97082, Germany.
| | - RuAngelie Edrada-Ebel
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, The John Arbuthnott Building, 161 Cathedral Street, Glasgow G4 0NR, UK.
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Yang X, Wang P, Yu B. Tackling the Challenges in the Total Synthesis of Landomycin A. CHEM REC 2013; 13:70-84. [DOI: 10.1002/tcr.201200018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Indexed: 02/06/2023]
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Pyramidamycins A-D and 3-hydroxyquinoline-2-carboxamide; cytotoxic benzamides from Streptomyces sp. DGC1. J Antibiot (Tokyo) 2012; 65:615-22. [PMID: 23047245 PMCID: PMC3528821 DOI: 10.1038/ja.2012.81] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Four new benzamides, pyramidamycins A-D (2–5) along with the new natural 3-hydroxyquinoline-2-carboxamide (6) were isolated from the crude extract of Streptomyces sp. DGC1. Additionally, five other known compounds namely 2-aminobenzamide (anthranilamide) (1), 4′,7-dihydroxyisoflavanone (7), 2′-deoxy-thymidine, 2′-deoxy-uridine and adenosine were also isolated and identified. The structures of the new compounds 2–6 were elucidated by 1D and 2D NMR studies along with HRMS analyses. The isolated compounds 1–6 contained the same amide side chain. The isolated compounds 1–7 were biologically evaluated in comparison with landomycin A against a prostate cancer cell line (PC3) and non small cell lung cancer cell line (H460) for 48 hrs and against several bacterialstrains. Pyramidamycin C (4) was the most active compound against both PC3 and H460 cell lines (GI50 = 2.473 μM and GI50 = 7.339 μM, respectively). Benzamides (1–3) demonstrated inhibitory activity against Kocuria rosea B-1106 (a diameter halo of 13±2 mm for 1; 10±2 mm for 2 and 3). Compound 6 was slightly active against both Escherichia coli DH5α and Micrococcus luteus NRRL B-2618 (diameter halos 8±2 mm and 9±2 mm, respectively). Taxonomically, the amplified 500 bp 16S rRNA fragment of the Streptomyces sp. DGC1 had 99% identity (BLAST search) to the 16S rRNA gene of Streptomyces atrovirens strain NRRL B-16357.
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Shaaban KA, Ahmed TA, Leggas M, Rohr J. Saquayamycins G-K, cytotoxic angucyclines from Streptomyces sp. Including two analogues bearing the aminosugar rednose. JOURNAL OF NATURAL PRODUCTS 2012; 75:1383-1392. [PMID: 22758660 PMCID: PMC3412564 DOI: 10.1021/np300316b] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Streptomyces sp. KY40-1, a strain isolated from the Kentucky Appalachian foothills, is the producer of moromycins A (18) and B (19). Further investigations of this strain led to the isolation and structure elucidation of the five new saquayamycins G-K (1-5), along with known compounds. Two of the new compounds bear the unusual aminosugar rednose, which was found here for the first time in angucyclines. The different attachment positions of this aminosugar in these two compounds indicate a high acceptor substrate flexibility of the responsible glycosyl transferase or alternatively the involvement of multiple glycosyl transferases. The cytotoxic activity of the isolated compounds was determined using human prostate cancer (PC-3) and non-small-cell lung cancer (H460) cell lines. Cell viability assays showed that saquayamycins J (4), K (5), A (7), and B (8) were most active in PC3 cells, with saquayamycin B (8) showing the highest activity (GI(50) = 0.0075 μM). The aminosugar-containing saquayamycins H (2) and saquayamycin B (8) showed the highest activity against H460 cells, with a GI(50) of 3.3 and 3.9 μM, respectively. The results presented here provide more insights into the structure-activity relationship of saquayamycins with respect to the nature, number, and linkage of sugar residues.
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Kharel MK, Rohr J. Delineation of gilvocarcin, jadomycin, and landomycin pathways through combinatorial biosynthetic enzymology. Curr Opin Chem Biol 2012; 16:150-61. [PMID: 22465094 DOI: 10.1016/j.cbpa.2012.03.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Revised: 03/08/2012] [Accepted: 03/09/2012] [Indexed: 11/30/2022]
Abstract
The exact sequence of events in biosyntheses of natural products is essential not only to understand and learn from nature's strategies and tricks to assemble complex natural products, but also for yield optimization of desired natural products, and for pathway engineering and muta-synthetic preparation of analogues of bioactive natural products. Biosyntheses of natural products were classically studied applying in vivo experiments, usually by combining incorporation experiments with stable-isotope labeled precursors with cross-feeding experiments of putative intermediates. Later genetic studies were dominant, which consist of gene cluster determination and analysis of gene inactivation experiments. From such studies various biosynthetic pathways were proposed, to a large extent just through in silico analyses of the biosynthetic gene clusters after DNA sequencing. Investigations of the complex biosyntheses of the angucycline group anticancer drugs landomycin, jadomycin and gilvocarcin revealed that in vivo and in silico studies were insufficient to delineate the true biosynthetic sequence of events. Neither was it possible to unambiguously assign enzyme activities, especially where multiple functional enzymes were involved. However, many of the intriguing ambiguities could be solved after in vitro reconstitution of major segments of these pathways, and subsequent systematic variations of the used enzyme mixtures. This method has been recently termed 'combinatorial biosynthetic enzymology'.
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Affiliation(s)
- Madan K Kharel
- Midway College School of Pharmacy, 120 Scott Perry Drive, Paintsville, KY 42240, USA
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Kharel MK, Pahari P, Shaaban KA, Wang G, Morris C, Rohr J. Elucidation of post-PKS tailoring steps involved in landomycin biosynthesis. Org Biomol Chem 2012; 10:4256-65. [PMID: 22454092 DOI: 10.1039/c2ob07171a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The functional roles of all proposed enzymes involved in the post-PKS redox reactions of the biosynthesis of various landomycin aglycones were thoroughly studied, both in vivo and in vitro. The results revealed that LanM2 acts as a dehydratase and is responsible for concomitant release of the last PKS-tethered intermediate to yield prejadomycin (10). Prejadomycin (10) was confirmed to be a general pathway intermediate of the biosynthesis. Oxygenase LanE and the reductase LanV are sufficient to convert 10 into 11-deoxylandomycinone (5) in the presence of NADH. LanZ4 is a reductase providing reduced flavin (FMNH) co-factor to the partner enzyme LanZ5, which controls all remaining steps. LanZ5, a bifunctional oxygenase-dehydratase, is a key enzyme directing landomycin biosynthesis. It catalyzes hydroxylation at the 11-position preferentially only after the first glycosylation step, and requires the presence of LanZ4. In the absence of such a glycosylation, LanZ5 catalyzes C5,6-dehydration, leading to the production of anhydrolandomycinone (8) or tetrangulol (9). The overall results provided a revised pathway for the biosynthesis of the four aglycones that are found in various congeners of the landomycin group.
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Affiliation(s)
- Madan K Kharel
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 South Limestone Street, Lexington, KY 40536-0596, USA
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Hsu DS, Huang JY. Room-Temperature B(OAc)3-Promoted Diels–Alder Reaction of Juglone with Styrenes: Total Syntheses of Tetrangulol and Anhydrolandomycinone. J Org Chem 2012; 77:2659-66. [DOI: 10.1021/jo202448e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Day-Shin Hsu
- Department of Chemistry and Biochemistry, National Chung Cheng University, Minhsiung, Taiwan
621
| | - Jiun-Yi Huang
- Department of Chemistry and Biochemistry, National Chung Cheng University, Minhsiung, Taiwan
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Bugaut X, Roulland E. Organocuprate-Initiated Domino Michael-Intramolecular Aldol Reaction - Application to the Formation of Ring B of the Aglycon of Landomycins. European J Org Chem 2012. [DOI: 10.1002/ejoc.201101766] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kharel MK, Pahari P, Shepherd MD, Tibrewal N, Nybo SE, Shaaban KA, Rohr J. Angucyclines: Biosynthesis, mode-of-action, new natural products, and synthesis. Nat Prod Rep 2011; 29:264-325. [PMID: 22186970 DOI: 10.1039/c1np00068c] [Citation(s) in RCA: 250] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covering: 1997 to 2010. The angucycline group is the largest group of type II PKS-engineered natural products, rich in biological activities and chemical scaffolds. This stimulated synthetic creativity and biosynthetic inquisitiveness. The synthetic studies used five different strategies, involving Diels-Alder reactions, nucleophilic additions, electrophilic additions, transition-metal mediated cross-couplings and intramolecular cyclizations to generate the angucycline frames. Biosynthetic studies were particularly intriguing when unusual framework rearrangements by post-PKS tailoring oxidoreductases occurred, or when unusual glycosylation reactions were involved in decorating the benz[a]anthracene-derived cores. This review follows our previous reviews, which were published in 1992 and 1997, and covers new angucycline group antibiotics published between 1997 and 2010. However, in contrast to the previous reviews, the main focus of this article is on new synthetic approaches and biosynthetic investigations, most of which were published between 1997 and 2010, but go beyond, e.g. for some biosyntheses all the way back to the 1980s, to provide the necessary context of information.
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Affiliation(s)
- Madan K Kharel
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, 789 S. Limestone Street, Lexington, Kentucky 40536-0596, USA
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Dupuis SN, Veinot T, Monro SMA, Douglas SE, Syvitski RT, Goralski KB, McFarland SA, Jakeman DL. Jadomycins derived from the assimilation and incorporation of norvaline and norleucine. JOURNAL OF NATURAL PRODUCTS 2011; 74:2420-2424. [PMID: 22050382 DOI: 10.1021/np200689w] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Streptomyces venezuelae ISP5230 is recognized for the production of chloramphenicol and the jadomycin family of natural products. The jadomycins are angucycline natural products containing a unique oxazolone ring incorporating an amino acid present in the minimal culture media. Substitution of different amino acids results in products of varying biological activity. Analysis of cultures of S. venezuelae ISP5230 incubated with l- and d-norvaline and l- and d-norleucine indicated that only the d-configured amino acids were incorporated into the natural products. Subsequently, jadomycin DNV and jadomycin DNL were isolated and characterized (titers 4 and 9 mg L(-1), respectively). The compounds were evaluated in the National Cancer Institute cell line cancer growth inhibition and cytotoxicity screens, for antimicrobial activity against selected Gram-positive and Gram-negative bacteria, and as DNA-cleavage agents in vitro.
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Affiliation(s)
- Stephanie N Dupuis
- Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada
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Yang X, Fu B, Yu B. Total Synthesis of Landomycin A, a Potent Antitumor Angucycline Antibiotic. J Am Chem Soc 2011; 133:12433-5. [DOI: 10.1021/ja205339p] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Xiaoyu Yang
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Boqiao Fu
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
| | - Biao Yu
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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Panchuk RR. Signaling pathways involved in apoptosis induced by novel angucycline antibiotic landomycin E in Jurkat T leukemia cells. ACTA ACUST UNITED AC 2011. [DOI: 10.7124/bc.00008b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- R. R. Panchuk
- Institute of Cell Biology, National Academy of Sciences of Ukraine
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11-Deoxylandomycinone and landomycins X-Z, new cytotoxic angucyclin(on)es from a Streptomyces cyanogenus K62 mutant strain. J Antibiot (Tokyo) 2010; 64:141-50. [PMID: 20978514 PMCID: PMC3030652 DOI: 10.1038/ja.2010.121] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Four new angucyclin(on)es, 11-deoxylandomycinone (1) and landomycins X-Z (2–4) were isolated from the crude extract of Streptomyces cyanogenus K62 mutant strain, along with the recently reported landomycins S, T and V (5–7) and five other known compounds. The structures of the new compounds 1–4 were elucidated by 1D and 2D NMR studies along with HRMS analyses. Unique about the structures is that the fourth sugar moiety (sugar D) in landomycins X-Z (2–4) was β-D-amicetose instead of β-D-olivose usually found in this position. The new angucyclin(on)es were biologically evaluated in comparison with previously known congeners against a small panel of MCF-7 (estrogen responsive) and MDA 231 (estrogen refractory) breast cancer cell lines. 11-deoxylandomycinone (IC50 2.1 and 1.2 μM) and landomycin Y (IC50 1.0 and 2.0 μM) showed the highest cytotoxic potencies against both cell lines.
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