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Du D, Katsuyama Y, Shin-ya K, Ohnishi Y. Reconstitution of a Type II Polyketide Synthase that Catalyzes Polyene Formation. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201709636] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Danyao Du
- Department of Biotechnology, Graduate School of Agricultural and Life Sciences; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
| | - Yohei Katsuyama
- Department of Biotechnology, Graduate School of Agricultural and Life Sciences; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
| | - Kazuo Shin-ya
- National Institute of Advanced Industrial Science and Technology (AIST); 2-4-7, Aomi Koto-ku Tokyo 135-0064 Japan
| | - Yasuo Ohnishi
- Department of Biotechnology, Graduate School of Agricultural and Life Sciences; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
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52
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Du D, Katsuyama Y, Shin-ya K, Ohnishi Y. Reconstitution of a Type II Polyketide Synthase that Catalyzes Polyene Formation. Angew Chem Int Ed Engl 2018; 57:1954-1957. [DOI: 10.1002/anie.201709636] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 12/11/2017] [Indexed: 12/20/2022]
Affiliation(s)
- Danyao Du
- Department of Biotechnology, Graduate School of Agricultural and Life Sciences; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
| | - Yohei Katsuyama
- Department of Biotechnology, Graduate School of Agricultural and Life Sciences; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
| | - Kazuo Shin-ya
- National Institute of Advanced Industrial Science and Technology (AIST); 2-4-7, Aomi Koto-ku Tokyo 135-0064 Japan
| | - Yasuo Ohnishi
- Department of Biotechnology, Graduate School of Agricultural and Life Sciences; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
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Abstract
Covering: 2006 to 2017Actinomycetes have been, for decades, one of the most important sources for the discovery of new antibiotics with an important number of drugs and analogs successfully introduced in the market and still used today in clinical practice. The intensive antibacterial discovery effort that generated the large number of highly potent broad-spectrum antibiotics, has seen a dramatic decline in the large pharma industry in the last two decades resulting in a lack of new classes of antibiotics with novel mechanisms of action reaching the clinic. Whereas the decline in the number of new chemical scaffolds and the rediscovery problem of old known molecules has become a hurdle for industrial natural products discovery programs, new actinomycetes compounds and leads have continued to be discovered and developed to the preclinical stages. Actinomycetes are still one of the most important sources of chemical diversity and a reservoir to mine for novel structures that is requiring the integration of diverse disciplines. These can range from novel strategies to isolate species previously not cultivated, innovative whole cell screening approaches and on-site analytical detection and dereplication tools for novel compounds, to in silico biosynthetic predictions from whole gene sequences and novel engineered heterologous expression, that have inspired the isolation of new NPs and shown their potential application in the discovery of novel antibiotics. This review will address the discovery of antibiotics from actinomycetes from two different perspectives including: (1) an update of the most important antibiotics that have only reached the clinical development in the recent years despite their early discovery, and (2) an overview of the most recent classes of antibiotics described from 2006 to 2017 in the framework of the different strategies employed to untap novel compounds previously overlooked with traditional approaches.
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Affiliation(s)
- Olga Genilloud
- Fundación MEDINA, Avda Conocimiento 34, 18016 Granada, Spain.
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Bioprospecting of Novel and Bioactive Compounds from Marine Actinomycetes Isolated from South China Sea Sediments. Curr Microbiol 2017; 75:142-149. [PMID: 28918535 DOI: 10.1007/s00284-017-1358-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Accepted: 09/12/2017] [Indexed: 02/07/2023]
Abstract
Marine actinomycetes are less investigated compared to terrestrial strains as potential sources of natural products. To date, few investigations have been performed on culturable actinomycetes associated with South China Sea sediments. In the present study, twenty-eight actinomycetes were recovered from South China Sea sediments after dereplication by traditional culture-dependent method. The 16S rRNA gene sequences analyses revealed that these strains related to five families and seven genera. Twelve representative strains possessed at least one of the biosynthetic genes coding for polyketide synthase I, II, and nonribosomal peptide synthetase. Four strains had anti-Mycobacterium phlei activities and five strains had activities against methicillin-resistant Staphylococcus aureus. 10 L-scale fermentation of strains Salinispora sp. NHF45, Nocardiopsis sp. NHF48, and Streptomyces sp. NHF86 were carried out for novel and bioactive compounds discovery. Finally, we obtained a novel α-pyrone compound from marine Nocardiopsis sp. NHF48, an analogue of paulomenol from marine Streptomyces sp. NHF86 and a new source of rifamycin B, produced by Salinispora sp. NHF45. The present study concluded that marine actinomycetes, which we isolated from South China Sea sediments, will be a suitable source for the development of novel and bioactive compounds.
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55
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Naughton LM, Romano S, O'Gara F, Dobson ADW. Identification of Secondary Metabolite Gene Clusters in the Pseudovibrio Genus Reveals Encouraging Biosynthetic Potential toward the Production of Novel Bioactive Compounds. Front Microbiol 2017; 8:1494. [PMID: 28868049 PMCID: PMC5563371 DOI: 10.3389/fmicb.2017.01494] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 07/25/2017] [Indexed: 11/18/2022] Open
Abstract
Increased incidences of antimicrobial resistance and the emergence of pan-resistant ‘superbugs’ have provoked an extreme sense of urgency amongst researchers focusing on the discovery of potentially novel antimicrobial compounds. A strategic shift in focus from the terrestrial to the marine environment has resulted in the discovery of a wide variety of structurally and functionally diverse bioactive compounds from numerous marine sources, including sponges. Bacteria found in close association with sponges and other marine invertebrates have recently gained much attention as potential sources of many of these novel bioactive compounds. Members of the genus Pseudovibrio are one such group of organisms. In this study, we interrogate the genomes of 21 Pseudovibrio strains isolated from a variety of marine sources, for the presence, diversity and distribution of biosynthetic gene clusters (BGCs). We expand on results obtained from antiSMASH analysis to demonstrate the similarity between the Pseudovibrio-related BGCs and those characterized in other bacteria and corroborate our findings with phylogenetic analysis. We assess how domain organization of the most abundant type of BGCs present among the isolates (Non-ribosomal peptide synthetases and Polyketide synthases) may influence the diversity of compounds produced by these organisms and highlight for the first time the potential for novel compound production from this genus of bacteria, using a genome guided approach.
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Affiliation(s)
- Lynn M Naughton
- School of Microbiology, University College Cork, National University of IrelandCork, Ireland
| | - Stefano Romano
- Division of Microbial Ecology, Department of Microbiology and Ecosystem Science, University of ViennaVienna, Austria
| | - Fergal O'Gara
- School of Biomedical Sciences, Curtin University, PerthWA, Australia.,BIOMERIT Research Centre, School of Microbiology, University College Cork, National University of IrelandCork, Ireland
| | - Alan D W Dobson
- School of Microbiology, University College Cork, National University of IrelandCork, Ireland
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56
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Auckloo BN, Pan C, Akhter N, Wu B, Wu X, He S. Stress-Driven Discovery of Novel Cryptic Antibiotics from a Marine Fungus Penicillium sp. BB1122. Front Microbiol 2017; 8:1450. [PMID: 28824581 PMCID: PMC5540946 DOI: 10.3389/fmicb.2017.01450] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 07/17/2017] [Indexed: 11/13/2022] Open
Abstract
Standard laboratory cultures have long been known to hinder activation of specific gene clusters which in turn hamper production of secondary metabolites with unique properties due to lack of innovation or the inability to trigger cryptic gene clusters’ expression. Due to challenges related to the avoidance of the isolation of replicated metabolites, resistance-developing pathogens are to be addressed by the scientific community worldwide in order to progress with novel and potent compounds which could further be developed in the future for pharmaceutical usage. This study reports the isolation of novel cryptic antibiotics from a marine fungus Penicillium sp. BB1122 collected from Zhoushan coast by applying the “metal-stress” strategy, here referring to the heavy metal cobalt (6 mM). High-performance liquid chromatography-guided isolation of four novel and four known compounds belonging to the polyketide class has been carried out where their relative as well as absolute configurations have been determined using spectroscopic analysis techniques as well as by the comparison of theoretically calculated ECD spectrum and the experimental ECD spectrum, respectively. The structures of novel compounds 7 and 8 represent the first example of 2,5-dioxabicyclo[2.2.1]heptane pyrone backbone bearing a migrated polyene chain. The novel compounds 7, 8, and 5 exhibited impressive antibiotic properties against methicillin resistant Staphylococcus aureus (MRSA) with MIC value of around 0.5 and 1 μg/mL, respectively. Moreover, the new compounds 1, 7, and 8 displayed potent antibiotic activities with MIC values of around 4 μg/mL against the pathogenic Pseudomonas aeruginosa. Moreover, the MBC of the different potent compounds ranged from 1 to 128 μg/mL against MRSA, P. aeruginosa, and Klebsiella pneumoniae. In addition, the cytotoxic activities were also evaluated where new antibiotics 7 and 8 were not obviously harmful toward normal liver cell lines LO2, showing IC50 values above 100 μg/mL. As a consequence, the results from this study unveiled that cobalt stress is an effective strategy to discover novel antibiotics from microorganisms.
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Affiliation(s)
| | | | | | - Bin Wu
- Ocean College, Zhejiang UniversityHangzhou, China
| | - Xiaodan Wu
- Center of Analysis and Measurement, Zhejiang UniversityHangzhou, China
| | - Shan He
- Laboratory of Marine Natural Products, School of Marine Sciences, Ningbo UniversityNingbo, China
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57
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Strepchazolins A and B: Two New Alkaloids from a Marine Streptomyces chartreusis NA02069. Mar Drugs 2017; 15:md15080244. [PMID: 28767052 PMCID: PMC5577599 DOI: 10.3390/md15080244] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 07/11/2017] [Accepted: 07/27/2017] [Indexed: 12/17/2022] Open
Abstract
Two new alkaloids, strepchazolins A (1) and B (2), together with a previously reported compound, streptazolin (3), were isolated from a marine actinomycete, Streptomyces chartreusis NA02069, collected in the Coast of Hainan Island, China. The structures of new compounds were determined by extensive NMR, mass spectroscopic and X-ray crystallographic analysis, as well as modified Mosher’s method. Compound 1 showed weak anti-Bacillus subtilis activity with the MIC value of 64.0 μM, and weak inhibitory activity against acetylcholinesterase (AChE) in vitro with IC50 value of 50.6 μM, while its diastereoisomer, Compound 2, is almost inactive.
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58
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A brief history of antibiotics and select advances in their synthesis. J Antibiot (Tokyo) 2017; 71:153-184. [DOI: 10.1038/ja.2017.62] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 04/17/2017] [Accepted: 04/23/2017] [Indexed: 12/20/2022]
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59
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Neo-actinomycins A and B, natural actinomycins bearing the 5H-oxazolo[4,5-b]phenoxazine chromophore, from the marine-derived Streptomyces sp. IMB094. Sci Rep 2017; 7:3591. [PMID: 28620204 PMCID: PMC5472614 DOI: 10.1038/s41598-017-03769-8] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 05/10/2017] [Indexed: 02/01/2023] Open
Abstract
Neo-actinomycins A and B (1 and 2), two new natural actinomycins featuring an unprecedented tetracyclic 5H-oxazolo[4,5-b]phenoxazine chromophore, were isolated from the marine-derived actinomycete Streptomyces sp. IMB094. Their structures were elucidated by spectroscopic analyses. The presence of this ring system was proposed to originate from a condensation between actinomycin D (3) with α-ketoglutarate and pyruvate, respectively. Compound 1 showed potent cytotoxic activities against human cancer HCT116 and A549 cell lines in the nanomolar range (IC50: 38.7 and 65.8 nM, respectively) and moderate antibacterial activities against methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococci (VRE) strains.
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60
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Dhakal D, Pokhrel AR, Shrestha B, Sohng JK. Marine Rare Actinobacteria: Isolation, Characterization, and Strategies for Harnessing Bioactive Compounds. Front Microbiol 2017; 8:1106. [PMID: 28663748 PMCID: PMC5471306 DOI: 10.3389/fmicb.2017.01106] [Citation(s) in RCA: 85] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 05/31/2017] [Indexed: 12/28/2022] Open
Abstract
Actinobacteria are prolific producers of thousands of biologically active natural compounds with diverse activities. More than half of these bioactive compounds have been isolated from members belonging to actinobacteria. Recently, rare actinobacteria existing at different environmental settings such as high altitudes, volcanic areas, and marine environment have attracted attention. It has been speculated that physiological or biochemical pressures under such harsh environmental conditions can lead to the production of diversified natural compounds. Hence, marine environment has been focused for the discovery of novel natural products with biological potency. Many novel and promising bioactive compounds with versatile medicinal, industrial, or agricultural uses have been isolated and characterized. The natural compounds cannot be directly used as drug or other purposes, so they are structurally modified and diversified to ameliorate their biological or chemical properties. Versatile synthetic biological tools, metabolic engineering techniques, and chemical synthesis platform can be used to assist such structural modification. This review summarizes the latest studies on marine rare actinobacteria and their natural products with focus on recent approaches for structural and functional diversification of such microbial chemicals for attaining better applications.
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Affiliation(s)
- Dipesh Dhakal
- Department of Life Science and Biochemical Engineering, Sun Moon UniversityAsan-si, South Korea
| | - Anaya Raj Pokhrel
- Department of Life Science and Biochemical Engineering, Sun Moon UniversityAsan-si, South Korea
| | - Biplav Shrestha
- Department of Life Science and Biochemical Engineering, Sun Moon UniversityAsan-si, South Korea
| | - Jae Kyung Sohng
- Department of Life Science and Biochemical Engineering, Sun Moon UniversityAsan-si, South Korea.,Department of BT-Convergent Pharmaceutical Engineering, Sun Moon University Asan-siSouth Korea
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61
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Streptomyces artemisiae MCCB 248 isolated from Arctic fjord sediments has unique PKS and NRPS biosynthetic genes and produces potential new anticancer natural products. 3 Biotech 2017; 7:32. [PMID: 28401470 PMCID: PMC5388659 DOI: 10.1007/s13205-017-0610-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 01/07/2017] [Indexed: 01/15/2023] Open
Abstract
After screening marine actinomycetes isolated from sediment samples collected from the Arctic fjord Kongsfjorden for potential anticancer activity, an isolate identified as Streptomyces artemisiae MCCB 248 exhibited promising results against the NCI-H460 human lung cancer cell line. H460 cells treated with the ethyl acetate extract of strain MCCB 248 and stained with Hoechst 33342 showed clear signs of apoptosis, including shrinkage of the cell nucleus, DNA fragmentation and chromatin condensation. Further to this treated cells showed indications of early apoptotic cell death, including a significant proportion of Annexin V positive staining and evidence of DNA damage as observed in the TUNEL assay. Amplified PKS 1 and NRPS genes involved in secondary metabolite production showed only 82% similarity to known biosynthetic genes of Streptomyces, indicating the likely production of a novel secondary metabolite in this extract. Additionally, chemical dereplication efforts using LC–MS/MS molecular networking suggested the presence of a series of undescribed tetraene polyols. Taken together, these results revealed that this Arctic S. artemisiae strain MCCB 248 is a promising candidate for natural products drug discovery and genome mining for potential anticancer agents.
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62
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Friedrich RM, Friestad GK. Access to ananti,syn-1,5,7-Triol by Configuration-Encoded 1,5-Polyol Synthesis: The C15-C25 Fragment of Tetrafibricin. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700373] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ryan M. Friedrich
- Department of Chemistry; University of Iowa; 52242 Iowa City Iowa USA
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63
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Zarins-Tutt JS, Abraham ER, Bailey CS, Goss RJM. Bluegenics: Bioactive Natural Products of Medicinal Relevance and Approaches to Their Diversification. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2017; 55:159-186. [PMID: 28238038 DOI: 10.1007/978-3-319-51284-6_5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Nature provides a valuable resource of medicinally relevant compounds, with many antimicrobial and antitumor agents entering clinical trials being derived from natural products. The generation of analogues of these bioactive natural products is important in order to gain a greater understanding of structure activity relationships; probing the mechanism of action, as well as to optimise the natural product's bioactivity and bioavailability. This chapter critically examines different approaches to generating natural products and their analogues, exploring the way in which synthetic and biosynthetic approaches may be blended together to enable expeditious access to new designer natural products.
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Affiliation(s)
| | - Emily R Abraham
- School of Chemistry, University of St Andrews, St Andrews, Scotland, UK
| | | | - Rebecca J M Goss
- School of Chemistry, University of St Andrews, St Andrews, Scotland, UK.
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64
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Affiliation(s)
- Luiz C. Dias
- Institute of Chemistry, University of Campinas, C.P. 6154, Campinas, SP 13083-970, Brazil
| | - Emilio C. de Lucca
- Institute of Chemistry, University of Campinas, C.P. 6154, Campinas, SP 13083-970, Brazil
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65
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Hassan SSU, Anjum K, Abbas SQ, Akhter N, Shagufta BI, Shah SAA, Tasneem U. Emerging biopharmaceuticals from marine actinobacteria. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 49:34-47. [PMID: 27898308 DOI: 10.1016/j.etap.2016.11.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 11/11/2016] [Accepted: 11/20/2016] [Indexed: 05/10/2023]
Abstract
Actinobacteria are quotidian microorganisms in the marine world, playing a crucial ecological role in the recycling of refractory biomaterials and producing novel secondary metabolites with pharmaceutical applications. Actinobacteria have been isolated from the huge area of marine organisms including sponges, tunicates, corals, mollusks, crabs, mangroves and seaweeds. Natural products investigation of the marine actinobacteria revealed that they can synthesize numerous natural products including alkaloids, polyketides, peptides, isoprenoids, phenazines, sterols, and others. These natural products have a potential to provide future drugs against crucial diseases like cancer, HIV, microbial and protozoal infections and severe inflammations. Therefore, marine actinobacteria portray as a pivotal resource for marine drugs. It is an upcoming field of research to probe a novel and pharmaceutically important secondary metabolites from marine actinobacteria. In this review, we attempt to summarize the present knowledge on the diversity, chemistry and mechanism of action of marine actinobacteria-derived secondary metabolites from 2007 to 2016.
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Affiliation(s)
| | - Komal Anjum
- Ocean College, Zhejiang University, Hangzhou 310058, China
| | - Syed Qamar Abbas
- Faculty of Pharmacy, Gomal University D.I. Khan, K.P.K 29050, Pakistan
| | - Najeeb Akhter
- Ocean College, Zhejiang University, Hangzhou 310058, China
| | - Bibi Ibtesam Shagufta
- Department of Zoology, Kohat University of Science and Technology (KUST), K.P.K 26000, Pakistan
| | | | - Umber Tasneem
- Department of Microbiology, Kohat University of Science and Technology (KUST), K.P.K 26000, Pakistan
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66
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Sukhonosova EV, Sokov SA, Ostapenko GI, Bunev AS, Dorovatovskii PV, Zubavichus YV, Khrustalev VN. Crystal structures of ethyl {2-[4-(4-iso-propyl-phen-yl)thia-zol-2-yl]phen-yl}carbamate and ethyl {2-[4-(3-nitro-phen-yl)thia-zol-2-yl]phen-yl}carbamate. Acta Crystallogr E Crystallogr Commun 2016; 72:1321-1325. [PMID: 27920926 PMCID: PMC5120716 DOI: 10.1107/s2056989016013104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 08/13/2016] [Indexed: 11/23/2022]
Abstract
The title compounds, C21H22N2O2S (I) and C18H15N3O4S (II), are structural analogs of the alkaloid Thio-sporine B. Both mol-ecules adopt a near-planar V-shaped conformation, which is consolidated by intra-molecular N-H⋯N and C-H⋯O hydrogen bonds. The crystal structure of (I) consists of mlecular stacks along the a axis, in which the mol-ecules are linked to each other by π(S)⋯π(C) inter-actions. In the crystal of (II), mol-ecules are linked into chains by C-H⋯O hydrogen bonds and the chains are cross-linked into (100) sheets by π-π stacking inter-actions.
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Affiliation(s)
- Elena V. Sukhonosova
- Laboratory of Functional Heterocyclic Compounds, Togliatti State University, 14 Belorusskaya St., Togliatti 445020, Russian Federation
| | - Sergey A. Sokov
- Laboratory of Functional Heterocyclic Compounds, Togliatti State University, 14 Belorusskaya St., Togliatti 445020, Russian Federation
| | - Gennady I. Ostapenko
- Laboratory of Functional Heterocyclic Compounds, Togliatti State University, 14 Belorusskaya St., Togliatti 445020, Russian Federation
| | - Alexander S. Bunev
- Laboratory of Functional Heterocyclic Compounds, Togliatti State University, 14 Belorusskaya St., Togliatti 445020, Russian Federation
| | - Pavel V. Dorovatovskii
- National Research Centre "Kurchatov Institute", 1 Acad. Kurchatov Sq., Moscow 123182, Russian Federation
| | - Yan V. Zubavichus
- National Research Centre "Kurchatov Institute", 1 Acad. Kurchatov Sq., Moscow 123182, Russian Federation
| | - Victor N. Khrustalev
- Inorganic Chemistry Department, Peoples’ Friendship University of Russia, 6 Miklukho-Maklay St., Moscow 117198, Russian Federation
- X-Ray Structural Centre, A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov St., B–334, Moscow 119991, Russian Federation
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67
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Barka EA, Vatsa P, Sanchez L, Gaveau-Vaillant N, Jacquard C, Meier-Kolthoff JP, Klenk HP, Clément C, Ouhdouch Y, van Wezel GP. Taxonomy, Physiology, and Natural Products of Actinobacteria. Microbiol Mol Biol Rev 2016; 80:1-43. [PMID: 26609051 PMCID: PMC4711186 DOI: 10.1128/mmbr.00019-15] [Citation(s) in RCA: 947] [Impact Index Per Article: 118.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Actinobacteria are Gram-positive bacteria with high G+C DNA content that constitute one of the largest bacterial phyla, and they are ubiquitously distributed in both aquatic and terrestrial ecosystems. Many Actinobacteria have a mycelial lifestyle and undergo complex morphological differentiation. They also have an extensive secondary metabolism and produce about two-thirds of all naturally derived antibiotics in current clinical use, as well as many anticancer, anthelmintic, and antifungal compounds. Consequently, these bacteria are of major importance for biotechnology, medicine, and agriculture. Actinobacteria play diverse roles in their associations with various higher organisms, since their members have adopted different lifestyles, and the phylum includes pathogens (notably, species of Corynebacterium, Mycobacterium, Nocardia, Propionibacterium, and Tropheryma), soil inhabitants (e.g., Micromonospora and Streptomyces species), plant commensals (e.g., Frankia spp.), and gastrointestinal commensals (Bifidobacterium spp.). Actinobacteria also play an important role as symbionts and as pathogens in plant-associated microbial communities. This review presents an update on the biology of this important bacterial phylum.
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Affiliation(s)
- Essaid Ait Barka
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | - Parul Vatsa
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | - Lisa Sanchez
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | - Nathalie Gaveau-Vaillant
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | - Cedric Jacquard
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | | | - Hans-Peter Klenk
- School of Biology, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Christophe Clément
- Laboratoire de Stress, Défenses et Reproduction des Plantes, Unité de Recherche Vignes et Vins de Champagne, UFR Sciences, UPRES EA 4707, Université de Reims Champagne-Ardenne, Reims, France
| | - Yder Ouhdouch
- Faculté de Sciences Semlalia, Université Cadi Ayyad, Laboratoire de Biologie et de Biotechnologie des Microorganismes, Marrakesh, Morocco
| | - Gilles P van Wezel
- Molecular Biotechnology, Institute of Biology, Sylvius Laboratories, Leiden University, Leiden, The Netherlands
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Saito S, Fujimaki T, Panbangred W, Igarashi Y, Imoto M. Antarlides: A New Type of Androgen Receptor (AR) Antagonist that Overcomes Resistance to AR-Targeted Therapy. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shun Saito
- Bioscience and Informatics; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Takahiro Fujimaki
- Bioscience and Informatics; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | | | - Yasuhiro Igarashi
- Biotechnology Research Center; Toyama Prefectural University; 5180 Kurokawa, Imizu Toyama 939-0398 Japan
| | - Masaya Imoto
- Bioscience and Informatics; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
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Saito S, Fujimaki T, Panbangred W, Igarashi Y, Imoto M. Antarlides: A New Type of Androgen Receptor (AR) Antagonist that Overcomes Resistance to AR-Targeted Therapy. Angew Chem Int Ed Engl 2016; 55:2728-32. [DOI: 10.1002/anie.201510079] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 11/19/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Shun Saito
- Bioscience and Informatics; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | - Takahiro Fujimaki
- Bioscience and Informatics; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
| | | | - Yasuhiro Igarashi
- Biotechnology Research Center; Toyama Prefectural University; 5180 Kurokawa, Imizu Toyama 939-0398 Japan
| | - Masaya Imoto
- Bioscience and Informatics; Keio University; 3-14-1 Hiyoshi, Kohoku-ku Yokohama 223-8522 Japan
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70
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Helfrich EJN, Piel J. Biosynthesis of polyketides by trans-AT polyketide synthases. Nat Prod Rep 2016; 33:231-316. [DOI: 10.1039/c5np00125k] [Citation(s) in RCA: 230] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This review discusses the biosynthesis of natural products that are generated bytrans-AT polyketide synthases, a family of catalytically versatile enzymes that represents one of the major group of proteins involved in the production of bioactive polyketides.
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Affiliation(s)
- Eric J. N. Helfrich
- Institute of Microbiology
- Eidgenössische Technische Hochschule (ETH) Zurich
- 8093 Zurich
- Switzerland
| | - Jörn Piel
- Institute of Microbiology
- Eidgenössische Technische Hochschule (ETH) Zurich
- 8093 Zurich
- Switzerland
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71
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Actinobacteria and Myxobacteria—Two of the Most Important Bacterial Resources for Novel Antibiotics. Curr Top Microbiol Immunol 2016; 398:273-302. [DOI: 10.1007/82_2016_503] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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72
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Haydl AM, Breit B. Atom-Economical Dimerization Strategy by the Rhodium-Catalyzed Addition of Carboxylic Acids to Allenes: Protecting-Group-Free Synthesis of Clavosolide A and Late-Stage Modification. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506618] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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73
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Haydl AM, Breit B. Atom‐Economical Dimerization Strategy by the Rhodium‐Catalyzed Addition of Carboxylic Acids to Allenes: Protecting‐Group‐Free Synthesis of Clavosolide A and Late‐Stage Modification. Angew Chem Int Ed Engl 2015; 54:15530-4. [DOI: 10.1002/anie.201506618] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 10/19/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Alexander M. Haydl
- Institut für Organische Chemie, Albert‐Ludwigs‐Universität Freiburg, Albertstrasse 21, 79104 Freiburg im Breisgau (Germany)
| | - Bernhard Breit
- Institut für Organische Chemie, Albert‐Ludwigs‐Universität Freiburg, Albertstrasse 21, 79104 Freiburg im Breisgau (Germany)
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74
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Fu P, MacMillan JB. Spithioneines A and B, Two New Bohemamine Derivatives Possessing Ergothioneine Moiety from a Marine-Derived Streptomyces spinoverrucosus. Org Lett 2015; 17:3046-9. [PMID: 26024315 PMCID: PMC4892649 DOI: 10.1021/acs.orglett.5b01328] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Indexed: 11/30/2022]
Abstract
Spithioneines A and B (1 and 2), two new bohemamine-type pyrrolizidine alkaloids possessing an unusual ergothioneine moiety, were isolated from a marine-derived Streptomyces spinoverrucosus. Their structures were elucidated by spectroscopic analysis, CD spectra, and chemical degradation and synthesis. Compounds 1 and 2 are rare natural products that incorporate the amino acid ergothioneine.
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Affiliation(s)
- Peng Fu
- Department of Biochemistry, University of Texas Southwestern Medical Center at
Dallas, Dallas, Texas 75390, United
States
| | - John B. MacMillan
- Department of Biochemistry, University of Texas Southwestern Medical Center at
Dallas, Dallas, Texas 75390, United
States
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75
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Varghese TA, Jayasri MA, Suthindhiran K. Marine Actinomycetes as potential source for histone deacetylase inhibitors and epigenetic modulation. Lett Appl Microbiol 2015; 61:69-76. [PMID: 25880615 DOI: 10.1111/lam.12430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2014] [Revised: 04/03/2015] [Accepted: 04/05/2015] [Indexed: 11/29/2022]
Abstract
UNLABELLED In the light of important detrimental role of aberrant histone deacetylases (HDAC) production during various clinical complications, development of therapeutically effective and specific inhibitors of HDAC is critically important. This study deals with the screening for HDAC inhibitors from marine Actinomycetes. The isolation of Actinomycetes from 22 sediment samples along the Southern Coast of India yielded 186 strains including Streptomyces, Nocardipsis, evaluated for HDAC inhibition using HeLa cells. Among the 186 isolates, 10 strains have shown moderate to strong inhibition. The maximum inhibition (61%) was seen with strain VITKSM06 and least inhibition (31%) was seen with strain VITSJT03. The MTT cell proliferation assay using HeLa cell line showed significant cytotoxicity with an IC50 of 5·9 μg ml(-1) by VITKSM06-derived metabolite and 26·2 μg ml(-1) by VITSJT03. The compound treated HeLa cells displayed an altered morphology and condensed chromatin which may be due to HDAC inhibition. Based on the phylogenetic analysis, the potential strains were identified as Nocardiopsis sp VITKSM06, Streptomyces sp VITAKS1 and Streptomyces sp VITRSM02. This study reveals the importance of screening marine Actinomycetes for the discovery of potential novel HDAC inhibitors of therapeutic importance. SIGNIFICANCE AND IMPACT OF THE STUDY Histone deacetylases (HDAC) are epigenetic enzymes that regulate the deacetylation in lysine group on a histone, and thus regulate the gene expression. The HDAC inhibitors are reported to promote apoptosis on tumour cells, thus become clinically important drug target. Several studies have addressed the identification of putative HDAC inhibitors as therapeutic agents for cancer and until now those cleared phase III human trials are very limited. This study attempts to investigate the chemical diversity found in marine Actinomycetes towards negative HDAC modulation, which could be used individually or in combination as anti-cancerous and other therapeutic measure.
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Affiliation(s)
- T A Varghese
- Marine Biotechnology and Bioproducts Lab, School of Biosciences and Technology, VIT University, Vellore, TN, India
| | - M A Jayasri
- Marine Biotechnology and Bioproducts Lab, School of Biosciences and Technology, VIT University, Vellore, TN, India
| | - K Suthindhiran
- Marine Biotechnology and Bioproducts Lab, School of Biosciences and Technology, VIT University, Vellore, TN, India
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Ravu RR, Jacob MR, Chen X, Wang M, Nasrin S, Kloepper JW, Liles MR, Mead DA, Khan IA, Li XC. Bacillusin A, an Antibacterial Macrodiolide from Bacillus amyloliquefaciens AP183. JOURNAL OF NATURAL PRODUCTS 2015; 78:924-8. [PMID: 25756620 DOI: 10.1021/np500911k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Bioassay-guided fractionation of the organic extracts of a Bacillus amyloliquefaciens strain (AP183) led to the discovery of a new macrocyclic polyene antibiotic, bacillusin A (1). Its structure was assigned by interpretation of NMR and MS spectroscopic data as a novel macrodiolide composed of dimeric 4-hydroxy-2-methoxy-6-alkenylbenzoic acid lactones with conjugated pentaene-hexahydroxy polyketide chains. Compound 1 showed potent antibacterial activities against methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus faecium with minimum inhibitory concentrations in a range of 0.6 to 1.2 μg/mL. The biosynthetic significance of this unique class of antibiotic compounds is briefly discussed.
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Affiliation(s)
| | | | | | | | | | | | | | - David A Mead
- ⊥Lucigen Corporation, Middleton, Wisconsin 53562, United States
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Zhou Y, Prediger P, Dias LC, Murphy AC, Leadlay PF. Macrodiolide formation by the thioesterase of a modular polyketide synthase. Angew Chem Int Ed Engl 2015; 54:5232-5. [PMID: 25753953 PMCID: PMC4471547 DOI: 10.1002/anie.201500401] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 02/04/2015] [Indexed: 11/10/2022]
Abstract
Elaiophylin is an unusual C2 -symmetric antibiotic macrodiolide produced on a bacterial modular polyketide synthase assembly line. To probe the mechanism and selectivity of diolide formation, we sought to reconstitute ring formation in vitro by using a non-natural substrate. Incubation of recombinant elaiophylin thioesterase/cyclase with a synthetic pentaketide analogue of the presumed monomeric polyketide precursor of elaiophylin, specifically its N-acetylcysteamine thioester, produced a novel 16-membered C2 -symmetric macrodiolide. A linear dimeric thioester is an intermediate in ring formation, which indicates iterative use of the thioesterase active site in ligation and subsequent cyclization. Furthermore, the elaiophylin thioesterase acts on a mixture of pentaketide and tetraketide thioesters to give both the symmetric decaketide diolide and the novel asymmetric hybrid nonaketide diolide. Such thioesterases have potential as tools for the in vitro construction of novel diolides.
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Affiliation(s)
- Yongjun Zhou
- Department of Biochemistry, University of Cambridge80 Tennis Court Road, Cambridge CB2 1GA (UK)
| | - Patrícia Prediger
- Institute of Chemistry, State University of Campinas, UNICAMPC.P. 6154, CEP 13084-971, Campinas SP (Brazil)
| | - Luiz Carlos Dias
- Institute of Chemistry, State University of Campinas, UNICAMPC.P. 6154, CEP 13084-971, Campinas SP (Brazil)
| | - Annabel C Murphy
- Department of Biochemistry, University of Cambridge80 Tennis Court Road, Cambridge CB2 1GA (UK)
| | - Peter F Leadlay
- Department of Biochemistry, University of Cambridge80 Tennis Court Road, Cambridge CB2 1GA (UK)
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78
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Cartuche L, Cruz D, Ramírez MI, Bailón N, Malagón O. Antibacterial and cytotoxic activity from the extract and fractions of a marine derived bacterium from the Streptomyces genus. PHARMACEUTICAL BIOLOGY 2015; 53:1826-1830. [PMID: 25880141 DOI: 10.3109/13880209.2015.1010739] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
CONTEXT Marine natural products are a rich source of potent, selective, and structurally novel compounds. Marine bacteria are considered the most promising source of biologically active compounds which can be applied to treat a wide range of diseases. OBJECTIVE The current study was designed to establish the bases for a future marine exploration in the Ecuadorian coast based on the molecular identification of a marine bacterium and its potential use as an antibacterial or cytotoxic compounds source. MATERIALS AND METHODS Isolation and characterization of the marine bacterium were carried out through microbiological methods from desiccated sediment. Molecular identification was made by means of 16S rDNA analysis. MIC was measured by the microdilution broth method against six pathogenic bacteria: two Gram positive and four Gram negative strains. Cytotoxicity was evaluated by Crystal violet assay against breast adenocarcinoma (MCF7) and ductal carcinoma (T47D and ZR-75-30). RESULTS Our present study has shown that EtOAc extract and fraction A1 obtained from marine Streptomyces sp. revealed the maximal antibacterial and cytotoxic activity. Enterococcus faecalis was found to be more sensitive strain (MIC 0.78 μg/ml) than the other five bacteria tested. ZR-75-30 and T47D cell lines were found to be more sensitive (IC50 value, 31.88 ± 0.05 and 68.35 ± 0.12 μg/ml) than adenocarcinoma MCF7 (IC50 value was 83.65 ± 0.06 μg/ml). DISCUSSION AND CONCLUSION The results obtained herein indicate that EtOAc extract of Streptomyces sp. has shown a strong antibacterial activity as well as moderate cytotoxic activity which make it a good candidate for metabolite isolation.
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Affiliation(s)
- Luis Cartuche
- Departamento de Química, Sección Química Básica y Aplicada, Universidad Técnica Particular de Loja , Loja , Ecuador
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79
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Heravi MM, Lashaki TB, Poorahmad N. Applications of Sharpless asymmetric epoxidation in total synthesis. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.03.006] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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80
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Fu P, MacMillan JB. Thiasporines A-C, thiazine and thiazole derivatives from a marine-derived Actinomycetospora chlora. JOURNAL OF NATURAL PRODUCTS 2015; 78:548-51. [PMID: 25584783 PMCID: PMC4380196 DOI: 10.1021/np500929z] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Indexed: 05/19/2023]
Abstract
Thiasporine A (1), the first natural product with a 5-hydroxy-4H-1,3-thiazin-4-one moiety, along with two new thiazole derivatives, thiasporines B and C (2 and 3), were isolated from the marine-derived Actinomycetospora chlora SNC-032. The structures of 1-3 were established on the basis of comprehensive spectroscopic analysis and chemical methods. Thiasporine A showed cytotoxicity against the non-small-cell lung cancer cell line H2122 with an IC50 value of 5.4 μM.
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81
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Zhou Y, Prediger P, Dias LC, Murphy AC, Leadlay PF. Macrodiolide Formation by the Thioesterase of a Modular Polyketide Synthase. ACTA ACUST UNITED AC 2015; 127:5321-5324. [PMID: 26300568 PMCID: PMC4535664 DOI: 10.1002/ange.201500401] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 02/04/2015] [Indexed: 01/24/2023]
Abstract
Elaiophylin is an unusual C2-symmetric antibiotic macrodiolide produced on a bacterial modular polyketide synthase assembly line. To probe the mechanism and selectivity of diolide formation, we sought to reconstitute ring formation in vitro by using a non-natural substrate. Incubation of recombinant elaiophylin thioesterase/cyclase with a synthetic pentaketide analogue of the presumed monomeric polyketide precursor of elaiophylin, specifically its N-acetylcysteamine thioester, produced a novel 16-membered C2-symmetric macrodiolide. A linear dimeric thioester is an intermediate in ring formation, which indicates iterative use of the thioesterase active site in ligation and subsequent cyclization. Furthermore, the elaiophylin thioesterase acts on a mixture of pentaketide and tetraketide thioesters to give both the symmetric decaketide diolide and the novel asymmetric hybrid nonaketide diolide. Such thioesterases have potential as tools for the in vitro construction of novel diolides.
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Affiliation(s)
- Yongjun Zhou
- Department of Biochemistry, University of Cambridge 80 Tennis Court Road, Cambridge CB2 1GA (UK) E-mail:
| | - Patrícia Prediger
- Institute of Chemistry, State University of Campinas UNICAMP, C.P. 6154, CEP 13084-971, Campinas SP (Brazil)
| | - Luiz Carlos Dias
- Institute of Chemistry, State University of Campinas UNICAMP, C.P. 6154, CEP 13084-971, Campinas SP (Brazil)
| | - Annabel C Murphy
- Department of Biochemistry, University of Cambridge 80 Tennis Court Road, Cambridge CB2 1GA (UK) E-mail:
| | - Peter F Leadlay
- Department of Biochemistry, University of Cambridge 80 Tennis Court Road, Cambridge CB2 1GA (UK) E-mail:
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Kannan RR, Iniyan AM, Prakash VSG. Isolation of a small molecule with anti-MRSA activity from a mangrove symbiont Streptomyces sp. PVRK-1 and its biomedical studies in Zebrafish embryos. Asian Pac J Trop Biomed 2015; 1:341-7. [PMID: 23569790 DOI: 10.1016/s2221-1691(11)60077-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2011] [Revised: 04/21/2011] [Accepted: 05/01/2011] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE The aim of the present study was to isolate the anti-MRSA (Methicillin Resistant Staphylococcus aureus) molecule from the Mangrove symbiont Streptomyces and its biomedical studies in Zebrafish embryos. METHODS MRSA was isolated from the pus samples of Colachal hospitals and confirmed by amplification of mecA gene. Anti-MRSA molecule producing strain was identified by 16s rRNA gene sequencing. Anti-MRSA compound production was optimized by Solid State Fermentation (SSF) and the purification of the active molecule was carried out by TLC and RP-HPLC. The inhibitory concentration and LC50 were calculated using Statistical software SPSS. The Biomedical studies including the cardiac assay and organ toxicity assessment were carried out in Zebrafish. RESULTS The bioactive anti-MRSA small molecule A2 was purified by TLC with Rf value of 0.37 with 1.389 retention time at RP-HPLC. The Inhibitory Concentration of the purified molecule A2 was 30 µg/mL but, the inhibitory concentration of the MRSA in the infected embryo was 32-34 µg/mL for TLC purified molecule A2 with LC50 mean value was 61.504 µg/mL. Zebrafish toxicity was assessed in 48-60 µg/mL by observing the physiological deformities and the heart beat rates (HBR) of embryos for anti MRSA molecule showed the mean of 41.33-41.67 HBR/15 seconds for 40 µg/mL and control was 42.33-42.67 for 15 seconds which significantly showed that the anti-MRSA molecule A2 did not affected the HBR. CONCLUSIONS Anti-MRSA molecule from Streptomyces sp PVRK-1 was isolated and biomedical studies in Zebrafish model assessed that the molecule was non toxic at the minimal inhibitory concentration of MRSA.
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Affiliation(s)
- Rajaretinam Rajesh Kannan
- International Centre for Nanobiotechnology (ICN), Centre for Marine Science and Technology (CMST), Manonmaniam Sundaranar University, Rajakkamangalam, Kanyakumari Dist-629502, TN, India
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83
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Kadaikunnan S, Rejiniemon T, Khaled JM, Alharbi NS, Mothana R. In-vitro antibacterial, antifungal, antioxidant and functional properties of Bacillus amyloliquefaciens. Ann Clin Microbiol Antimicrob 2015; 14:9. [PMID: 25858278 PMCID: PMC4342198 DOI: 10.1186/s12941-015-0069-1] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 01/28/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Food born pathogenic bacteria and filamentous fungi are able to grow on most foods, including natural foods, processed foods, and fermented foods and create considerable economic loss. The aim of this study was to determine the antibacterial, antifungal, antioxidant and functional properties of Bacillus amyloliquefaciens recovered from silage. METHODS Minimum Inhibitory Concentration (MIC) of the compounds was assessed by using broth micro dilution method. The 1,1-diphenyl-2-picrylhydrazyl (DPPH)-radical scavenging and hydroxyl radical-scavenging abilities were measured to evaluate antioxidant activity of the strain. RESULTS Primary antimicrobial compound production screening revealed that B. amyloliquefaciens exhibited significant activity against all the tested bacteria and fungi compared to other strains. The 16S rRNA and gyrase A gene sequence analysis determined using molecular biological tools confirmed that the strain was 99% similarity towards B. amyloliquefaciens. The Minimum Inhibitory Concentration (MIC) of ethyl acetate extract against Bacillus subtilis, Enterococcus cloacae and Staphylococcus aureus were 25.0 μg ml-1, and S, epidermidis were 12.5 μg ml-1, respectively. Filamentous fungi Aspergillus clavatus, A. fumigates, A. niger and Gibberella moniliformis showed 25 μg ml-1. VJ-1 was able to survive the gastrointestinal conditions simulating the stomach and duodenum passage with the highest percentage of hydrophobicity. In addition, its resistance to hydrogen peroxide and highest hydroxyl radical and 2, 2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activities, with inhibition rates of 56.84% and 67.12% respectively, were its advantage. An antimicrobial susceptibility pattern was an intrinsic feature of this strain, and thus, consumption does not represent a health risk to humans. CONCLUSION Bacillus amyloliquefaciens might be a promising candidate for new pharmaceutical agents and probiotics.
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84
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Bernal MG, Campa-Córdova ÁI, Saucedo PE, González MC, Marrero RM, Mazón-Suástegui JM. Isolation and in vitro selection of actinomycetes strains as potential probiotics for aquaculture. Vet World 2015; 8:170-6. [PMID: 27047067 PMCID: PMC4774698 DOI: 10.14202/vetworld.2015.170-176] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Revised: 12/25/2014] [Accepted: 01/03/2015] [Indexed: 01/14/2023] Open
Abstract
AIM This study was designed to describe a series of in vitro tests that may aid the discovery of probiotic strains from actinomycetes. MATERIALS AND METHODS Actinomycetes were isolated from marine sediments using four different isolation media, followed by antimicrobial activity and toxicity assessment by the agar diffusion method and the hemolysis of human blood cells, respectively. Extracellular enzymatic production was monitored by the hydrolysis of proteins, lipids and carbohydrates. Tolerance to different pH values and salt concentrations was also determined, followed by hydrophobicity analysis and genetic identification of the most promising strains. RESULTS Five out of 31 isolated strains showed antimicrobial activity against three Vibrio species. Three non-hemolytic strains (N7, RL8 and V4) among these active isolates yielded positive results in hydrophobicity tests and exhibited good growth at salt concentrations ranging from 0% to 10%, except strain RL8, which required a salt concentration >0.6%. Although these strains did not grow at pH<3, they showed different enzymatic activities. Phylogenetic analysis revealed that strains N7 and V4 have more than 99% identity with several Streptomyces species, whereas the closest matches to strain RL8 are Streptomyces panacagri and Streptomyces flocculus, with 98% and 98.2% similarity, respectively. CONCLUSION Three actinomycetes strains showing probiotic-like properties were discovered using several in vitro tests that can be easily implemented in different institutions around the world.
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Affiliation(s)
- Milagro García Bernal
- Department of Microbiology, Center for the Study of Bioactive Chemicals (CBQ), Central University “Marta Abreu” of Las Villas. Road to Camajuaní Km 5½. Santa Clara 54830. Villa Clara. Cuba
| | - Ángel Isidro Campa-Córdova
- Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Instituto Politécnico Nacional No. 195, Col. Playa Palo de Santa Rita Sur, C.P. 23090. La Paz, Baja California Sur, México
| | - Pedro Enrique Saucedo
- Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Instituto Politécnico Nacional No. 195, Col. Playa Palo de Santa Rita Sur, C.P. 23090. La Paz, Baja California Sur, México
| | - Marlen Casanova González
- Department of Microbiology, Center for the Study of Bioactive Chemicals (CBQ), Central University “Marta Abreu” of Las Villas. Road to Camajuaní Km 5½. Santa Clara 54830. Villa Clara. Cuba
| | - Ricardo Medina Marrero
- Department of Microbiology, Center for the Study of Bioactive Chemicals (CBQ), Central University “Marta Abreu” of Las Villas. Road to Camajuaní Km 5½. Santa Clara 54830. Villa Clara. Cuba
| | - José Manuel Mazón-Suástegui
- Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Instituto Politécnico Nacional No. 195, Col. Playa Palo de Santa Rita Sur, C.P. 23090. La Paz, Baja California Sur, México
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Wang J, Wei X, Qin X, Lin X, Zhou X, Liao S, Yang B, Liu J, Tu Z, Liu Y. Arthpyrones A-C, pyridone alkaloids from a sponge-derived fungus Arthrinium arundinis ZSDS1-F3. Org Lett 2015; 17:656-9. [PMID: 25606827 DOI: 10.1021/ol503646c] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Three new 4-hydroxy-2-pyridone alkaloids, arthpyrones A-C (1-3), were isolated from the sponge-derived fungus Arthrinium arundinis ZSDS1-F3. Their structures were elucidated on the basis of spectroscopic analysis, CD spectra, quantum chemical calculation, and X-ray single-crystal diffraction analysis. Compounds 1 and 2 possessed a 2-pyridone core featured with a decalin moiety linked via a carboxide bridge bearing a novel oxabicyclo[3.3.1]nonane ring system rarely discovered in nature. A possible biosynthetic pathway for them was proposed.
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Affiliation(s)
- Junfeng Wang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology/Guangdong Key Laboratory of Marine Materia Medica/RNAM Center for Marine Microbiology, South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou 510301, China
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86
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Hamedi J, Mohammadipanah F, Panahi HKS. Biotechnological Exploitation of Actinobacterial Members. SUSTAINABLE DEVELOPMENT AND BIODIVERSITY 2015. [DOI: 10.1007/978-3-319-14595-2_3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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87
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Donia MS, Cimermancic P, Schulze CJ, Wieland Brown LC, Martin J, Mitreva M, Clardy J, Linington RG, Fischbach MA. A systematic analysis of biosynthetic gene clusters in the human microbiome reveals a common family of antibiotics. Cell 2014; 158:1402-1414. [PMID: 25215495 PMCID: PMC4164201 DOI: 10.1016/j.cell.2014.08.032] [Citation(s) in RCA: 460] [Impact Index Per Article: 46.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 05/30/2014] [Accepted: 08/20/2014] [Indexed: 11/28/2022]
Abstract
In complex biological systems, small molecules often mediate microbe-microbe and microbe-host interactions. Using a systematic approach, we identified 3,118 small-molecule biosynthetic gene clusters (BGCs) in genomes of human-associated bacteria and studied their representation in 752 metagenomic samples from the NIH Human Microbiome Project. Remarkably, we discovered that BGCs for a class of antibiotics in clinical trials, thiopeptides, are widely distributed in genomes and metagenomes of the human microbiota. We purified and solved the structure of a thiopeptide antibiotic, lactocillin, from a prominent member of the vaginal microbiota. We demonstrate that lactocillin has potent antibacterial activity against a range of Gram-positive vaginal pathogens, and we show that lactocillin and other thiopeptide BGCs are expressed in vivo by analyzing human metatranscriptomic sequencing data. Our findings illustrate the widespread distribution of small-molecule-encoding BGCs in the human microbiome, and they demonstrate the bacterial production of drug-like molecules in humans. PAPERCLIP:
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Affiliation(s)
- Mohamed S Donia
- Department of Bioengineering and Therapeutic Sciences and the California Institute for Quantitative Biosciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Peter Cimermancic
- Department of Bioengineering and Therapeutic Sciences and the California Institute for Quantitative Biosciences, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Christopher J Schulze
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | | | - John Martin
- The Genome Institute, Department of Medicine and Department of Genetics, Washington University School of Medicine, St. Louis, MO 63108, USA
| | - Makedonka Mitreva
- The Genome Institute, Department of Medicine and Department of Genetics, Washington University School of Medicine, St. Louis, MO 63108, USA
| | - Jon Clardy
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA
| | - Roger G Linington
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Michael A Fischbach
- Department of Bioengineering and Therapeutic Sciences and the California Institute for Quantitative Biosciences, University of California, San Francisco, San Francisco, CA 94158, USA.
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88
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Duraipandiyan V, Al-Dhabi NA, Balachandran C, Raj MK, Arasu MV, Ignacimuthu S. Novel 1,5,7-trihydroxy-3-hydroxy methyl anthraquinone isolated from terrestrial Streptomyces sp. (eri-26) with antimicrobial and molecular docking studies. Appl Biochem Biotechnol 2014; 174:1784-94. [PMID: 25149455 DOI: 10.1007/s12010-014-1157-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2014] [Accepted: 08/15/2014] [Indexed: 11/24/2022]
Abstract
Streptomyces sp. isolate ERI-26 was obtained from the Nilgiris forest soil of Western Ghats, Tamil Nadu, India. Novel anthraquinone compound was isolated from the active fraction 5; it was identified by spectroscopical data using UV, IR, NMR and MASS. The isolated compound 1,5,7-trihydroxy-3-hydroxy methyl anthraquinone was tested against bacteria and fungi at minimum inhibitory concentration level. The compound showed significant antimicrobial activity against bacteria, Staphylococcus aureus at 125 μg/ml, Staphylococcus epidermidis at 62.5 μg/m, Bacillus subtilis at 31.25 μg/ml, fungi; Epidermophyton floccosum at 62.5 μg/ml, Aspergillus niger at 31.25 μg/ml, Aspergiller flavus at 31.25 μg/ml, Trichophyton rubrum at 62.5 μg/ml and Botrytis cinerea at 62.5 μg/ml. The isolated compound was subjected to molecular docking studies for the inhibition of TtgR, topoisomerase IV and AmpC β-lactamase enzymes which are targets for antimicrobials. Docking studies of the compound showed low docking energy indicating its usefulness as antimicrobial agent. 1,5,7-Trihydroxy-3-hydroxy methyl anthraquinone is new, and its antimicrobial and molecular docking properties are reported for the first time.
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Affiliation(s)
- V Duraipandiyan
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh-11451, Saudi Arabia,
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89
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Nishimaru T, Kondo M, Takeshita K, Takahashi K, Ishihara J, Hatakeyama S. Total Synthesis of Marinomycin A Based on a Direct Dimerization Strategy. Angew Chem Int Ed Engl 2014; 53:8459-62. [DOI: 10.1002/anie.201404408] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Indexed: 11/07/2022]
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90
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Nishimaru T, Kondo M, Takeshita K, Takahashi K, Ishihara J, Hatakeyama S. Total Synthesis of Marinomycin A Based on a Direct Dimerization Strategy. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404408] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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91
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Fu P, Johnson M, Chen H, Posner BA, MacMillan JB. Carpatamides A-C, cytotoxic arylamine derivatives from a marine-derived Streptomyces sp. JOURNAL OF NATURAL PRODUCTS 2014; 77:1245-1248. [PMID: 24754815 PMCID: PMC4035114 DOI: 10.1021/np500207p] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Indexed: 06/03/2023]
Abstract
Three new acylated arylamine derivatives (1-3), carpatamides A-C, were isolated from a marine-derived Streptomyces sp. based on activity screening against non-small-cell lung cancer (NSCLC). The structures of 1-3 were established on the basis of comprehensive spectroscopic analyses and chemical methods. Compounds 1 and 3 showed moderate cytotoxicity against NSCLC cell lines HCC366, A549, and HCC44 with IC50 values ranging from 2.2 to 8.4 μM.
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92
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Duncan K, Haltli B, Gill KA, Kerr RG. Bioprospecting from marine sediments of New Brunswick, Canada: exploring the relationship between total bacterial diversity and actinobacteria diversity. Mar Drugs 2014; 12:899-925. [PMID: 24531187 PMCID: PMC3944522 DOI: 10.3390/md12020899] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 01/07/2014] [Accepted: 01/21/2014] [Indexed: 12/16/2022] Open
Abstract
Actinomycetes are an important resource for the discovery of natural products with therapeutic properties. Bioprospecting for actinomycetes typically proceeds without a priori knowledge of the bacterial diversity present in sampled habitats. In this study, we endeavored to determine if overall bacterial diversity in marine sediments, as determined by 16S rDNA amplicon pyrosequencing, could be correlated with culturable actinomycete diversity, and thus serve as a powerful tool in guiding future bioprospecting efforts. Overall bacterial diversity was investigated in eight marine sediments from four sites in New Brunswick, Canada, resulting in over 44,000 high quality sequences (x = 5610 per sample). Analysis revealed all sites exhibited significant diversity (H' = 5.4 to 6.7). Furthermore, statistical analysis of species level bacterial communities (D = 0.03) indicated community composition varied according to site and was strongly influenced by sediment physiochemical composition. In contrast, cultured actinomycetes (n = 466, 98.3% Streptomyces) were ubiquitously distributed among all sites and distribution was not influenced by sediment composition, suggesting that the biogeography of culturable actinomycetes does not correlate with overall bacterial diversity in the samples examined. These actinomycetes provide a resource for future secondary metabolite discovery, as exemplified by the antimicrobial activity observed from preliminary investigation.
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Affiliation(s)
- Katherine Duncan
- Department of Biomedical Sciences, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
| | - Bradley Haltli
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
| | - Krista A Gill
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
| | - Russell G Kerr
- Department of Biomedical Sciences, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
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93
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Isolation and characterization of anti-adenoviral secondary metabolites from marine actinobacteria. Mar Drugs 2014; 12:799-821. [PMID: 24477283 PMCID: PMC3944516 DOI: 10.3390/md12020799] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 01/10/2014] [Accepted: 01/15/2014] [Indexed: 12/19/2022] Open
Abstract
Adenovirus infections in immunocompromised patients are associated with high mortality rates. Currently, there are no effective anti-adenoviral therapies available. It is well known that actinobacteria can produce secondary metabolites that are attractive in drug discovery due to their structural diversity and their evolved interaction with biomolecules. Here, we have established an extract library derived from actinobacteria isolated from Vestfjorden, Norway, and performed a screening campaign to discover anti-adenoviral compounds. One extract with anti-adenoviral activity was found to contain a diastereomeric 1:1 mixture of the butenolide secondary alcohols 1a and 1b. By further cultivation and analysis, we could isolate 1a and 1b in different diastereomeric ratio. In addition, three more anti-adenoviral butenolides 2, 3 and 4 with differences in their side-chains were isolated. In this study, the anti-adenoviral activity of these compounds was characterized and substantial differences in the cytotoxic potential between the butenolide analogs were observed. The most potent butenolide analog 3 displayed an EC50 value of 91 μM and no prominent cytotoxicity at 2 mM. Furthermore, we propose a biosynthetic pathway for these compounds based on their relative time of appearance and structure.
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94
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Abdelmohsen UR, Bayer K, Hentschel U. Diversity, abundance and natural products of marine sponge-associated actinomycetes. Nat Prod Rep 2014; 31:381-99. [DOI: 10.1039/c3np70111e] [Citation(s) in RCA: 186] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This review discusses the diversity, abundance and natural products repertoire of actinomycetes associated with marine sponges. Comprehensive phylogenetic analysis was carried out and qPCR data on actinomycete abundances in sponge ecosystems are presented.
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Affiliation(s)
- Usama Ramadan Abdelmohsen
- Department of Botany II
- Julius-von-Sachs-Institute for Biological Sciences
- University of Würzburg
- 97082 Würzburg, Germany
- Department of Pharmacognosy
| | - Kristina Bayer
- Department of Botany II
- Julius-von-Sachs-Institute for Biological Sciences
- University of Würzburg
- 97082 Würzburg, Germany
| | - Ute Hentschel
- Department of Botany II
- Julius-von-Sachs-Institute for Biological Sciences
- University of Würzburg
- 97082 Würzburg, Germany
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95
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Madden KS, Mosa FA, Whiting A. Non-isoprenoid polyene natural products – structures and synthetic strategies. Org Biomol Chem 2014; 12:7877-99. [DOI: 10.1039/c4ob01337a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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96
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Jiao W, Zhang F, Zhao X, Hu J, Suh JW. A novel alkaloid from marine-derived actinomycete Streptomyces xinghaiensis with broad-spectrum antibacterial and cytotoxic activities. PLoS One 2013; 8:e75994. [PMID: 24098415 PMCID: PMC3787992 DOI: 10.1371/journal.pone.0075994] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2013] [Accepted: 08/19/2013] [Indexed: 01/16/2023] Open
Abstract
Due to the increasing emergence of drug-resistant bacteria and tumor cell lines, novel antibiotics with antibacterial and cytotoxic activities are urgently needed. Marine actinobacteria are rich sources of novel antibiotics, and here we report the discovery of a novel alkaloid, xinghaiamine A, from a marine-derived actinomycete Streptomyces xinghaiensis NRRL B24674T. Xinghaiamine A was purified from the fermentation broth, and its structure was elucidated based on extensive spectroscopic analysis, including 1D and 2D NMR spectrum as well as mass spectrometry. Xinghaiamine A was identified to be a novel alkaloid with highly symmetric structure on the basis of sulfoxide functional group, and sulfoxide containing compound has so far never been reported in microorganisms. Biological assays revealed that xinghaiamine A exhibited broad-spectrum antibacterial activities to both Gram-negative persistent hospital pathogens (e.g. Acinetobacter baumannii, Pseudomonas aeruginosa and Escherichia coli) and Gram-positive ones, which include Staphylococcus aureus and Bacillus subtilis. In addition, xinghaiamine A also exhibited potent cytotoxic activity to human cancer cell lines of MCF-7 and U-937 with the IC50 of 0.6 and 0.5 µM, respectively.
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Affiliation(s)
- Wence Jiao
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
| | - Fenghua Zhang
- First Affiliated Hospital of Dalian Medical University, Dalian, China
| | - Xinqing Zhao
- School of Life Science and Biotechnology, Dalian University of Technology, Dalian, China
- * E-mail:
| | - Jiehan Hu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China
| | - Joo-Won Suh
- Division of Bioscience and Bioinformatics, Myongji University, Yongin, Korea
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97
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Pharmaceutically active secondary metabolites of marine actinobacteria. Microbiol Res 2013; 169:262-78. [PMID: 23958059 DOI: 10.1016/j.micres.2013.07.014] [Citation(s) in RCA: 213] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2013] [Revised: 06/29/2013] [Accepted: 07/22/2013] [Indexed: 01/03/2023]
Abstract
Marine actinobacteria are one of the most efficient groups of secondary metabolite producers and are very important from an industrial point of view. Many representatives of the order Actinomycetales are prolific producers of thousands of biologically active secondary metabolites. Actinobacteria from terrestrial sources have been studied and screened since the 1950s, for many important antibiotics, anticancer, antitumor and immunosuppressive agents. However, frequent rediscovery of the same compounds from the terrestrial actinobacteria has made them less attractive for screening programs in the recent years. At the same time, actinobacteria isolated from the marine environment have currently received considerable attention due to the structural diversity and unique biological activities of their secondary metabolites. They are efficient producers of new secondary metabolites that show a range of biological activities including antibacterial, antifungal, anticancer, antitumor, cytotoxic, cytostatic, anti-inflammatory, anti-parasitic, anti-malaria, antiviral, antioxidant, anti-angiogenesis, etc. In this review, an evaluation is made on the current status of research on marine actinobacteria yielding pharmaceutically active secondary metabolites. Bioactive compounds from marine actinobacteria possess distinct chemical structures that may form the basis for synthesis of new drugs that could be used to combat resistant pathogens. With the increasing advancement in science and technology, there would be a greater demand for new bioactive compounds synthesized by actinobacteria from various marine sources in future.
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98
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Yus M, González-Gómez JC, Foubelo F. Diastereoselective Allylation of Carbonyl Compounds and Imines: Application to the Synthesis of Natural Products. Chem Rev 2013; 113:5595-698. [DOI: 10.1021/cr400008h] [Citation(s) in RCA: 398] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Miguel Yus
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
| | - José C. González-Gómez
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
| | - Francisco Foubelo
- Departamento de Química
Orgánica, Facultad
de Ciencias and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Apdo. 99, 03080 Alicante,
Spain
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99
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Zou Y, Yin H, Kong D, Deng Z, Lin S. ATrans-Acting Ketoreductase in Biosynthesis of a Symmetric Polyketide Dimer SIA7248. Chembiochem 2013; 14:679-83. [DOI: 10.1002/cbic.201300068] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Indexed: 11/07/2022]
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100
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Recent advances in the discovery and development of marine microbial natural products. Mar Drugs 2013; 11:700-17. [PMID: 23528949 PMCID: PMC3705366 DOI: 10.3390/md11030700] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 01/25/2013] [Accepted: 02/06/2013] [Indexed: 01/05/2023] Open
Abstract
Marine microbial natural products (MMNPs) have attracted increasing attention from microbiologists, taxonomists, ecologists, agronomists, chemists and evolutionary biologists during the last few decades. Numerous studies have indicated that diverse marine microbes appear to have the capacity to produce an impressive array of MMNPs exhibiting a wide variety of biological activities such as antimicrobial, anti-tumor, anti-inflammatory and anti-cardiovascular agents. Marine microorganisms represent an underexplored reservoir for the discovery of MMNPs with unique scaffolds and for exploitation in the pharmaceutical and agricultural industries. This review focuses on MMNPs discovery and development over the past decades, including innovative isolation and culture methods, strategies for discovering novel MMNPs via routine screenings, metagenomics, genomics, combinatorial biosynthesis, and synthetic biology. The potential problems and future directions for exploring MMNPs are also discussed.
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