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Saini K, Singh J, Shah R, Kaur J, Singh D, Singh N, Jaggi AS, Chopra DS, Singh RS. Synthesis of 1-(4-hydroxy-3-methoxyphenyl)-2,3,4,9-tetrahydro-1H-β-carboline-3-carboxylic acid derivatives as mast cell stabilizers. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02555-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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52
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Role of symbiosis in the discovery of novel antibiotics. J Antibiot (Tokyo) 2020; 73:490-503. [PMID: 32499556 DOI: 10.1038/s41429-020-0321-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 04/18/2020] [Accepted: 04/26/2020] [Indexed: 12/16/2022]
Abstract
Antibiotic resistance has been an ongoing challenge that has emerged almost immediately after the initial discovery of antibiotics and requires the development of innovative new antibiotics and antibiotic combinations that can effectively mitigate the development of resistance. More than 35,000 people die each year from antibiotic resistant infections in just the United States. This signifies the importance of identifying other alternatives to antibiotics for which resistance has developed. Virtually, all currently used antibiotics can trace their genesis to soil derived bacteria and fungi. The bacteria and fungi involved in symbiosis is an area that still remains widely unexplored for the discovery and development of new antibiotics. This brief review focuses on the challenges and opportunities in the application of symbiotic microbes and also provides an interesting platform that links natural product chemistry with evolutionary biology and ecology.
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Chanana S, Thomas CS, Zhang F, Rajski SR, Bugni TS. hcapca: Automated Hierarchical Clustering and Principal Component Analysis of Large Metabolomic Datasets in R. Metabolites 2020; 10:E297. [PMID: 32708222 PMCID: PMC7407629 DOI: 10.3390/metabo10070297] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/13/2020] [Accepted: 07/18/2020] [Indexed: 11/16/2022] Open
Abstract
Microbial natural product discovery programs face two main challenges today: rapidly prioritizing strains for discovering new molecules and avoiding the rediscovery of already known molecules. Typically, these problems have been tackled using biological assays to identify promising strains and techniques that model variance in a dataset such as PCA to highlight novel chemistry. While these tools have shown successful outcomes in the past, datasets are becoming much larger and require a new approach. Since PCA models are dependent on the members of the group being modeled, large datasets with many members make it difficult to accurately model the variance in the data. Our tool, hcapca, first groups strains based on the similarity of their chemical composition, and then applies PCA to the smaller sub-groups yielding more robust PCA models. This allows for scalable chemical comparisons among hundreds of strains with thousands of molecular features. As a proof of concept, we applied our open-source tool to a dataset with 1046 LCMS profiles of marine invertebrate associated bacteria and discovered three new analogs of an established anticancer agent from one promising strain.
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Affiliation(s)
| | | | | | | | - Tim S. Bugni
- Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin, Madison, WI 53705, USA; (S.C.); (C.S.T.); (F.Z.); (S.R.R.)
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Meenatchi R, Brindangnanam P, Hassan S, Rathna K, Kiran GS, Selvin J. Diversity of a bacterial community associated with Cliona lobata Hancock and Gelliodes pumila (Lendenfeld, 1887) sponges on the South-East coast of India. Sci Rep 2020; 10:11558. [PMID: 32665602 PMCID: PMC7360593 DOI: 10.1038/s41598-020-67717-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 05/13/2020] [Indexed: 01/05/2023] Open
Abstract
Marine sponges are sources of various bioactive metabolites, including several anticancer drugs, produced mainly by sponge-associated microbes. Palk Bay, on the south-east coast of India, is an understudied, highly disturbed reef environment exposed to various anthropogenic and climatic stresses. In recent years, Palk Bay suffered from pollution due to the dumping of untreated domestic sewage, effluents from coastal aquaculture, tourism, salt pans, cultivation of exotic seaweeds, and geogenic heavy-metal pollution, especially arsenic, mercury, cadmium, and lead. Low microbial-abundant sponge species, such as Gelliodes pumila and Cliona lobata, were found to be ubiquitously present in this reef environment. Triplicate samples of each of these sponge species were subjected to Illumina MiSeq sequencing using V3–V4 region-specific primers. In both C. lobata and G. pumila, there was an overwhelming dominance (98 and 99%) of phylum Candidatus Saccharibacteria and Proteobacteria, respectively. The overall number of operational taxonomic units (OTUs) was 68 (40 and 13 OTUs unique to G. pumila and C. lobata, respectively; 15 shared OTUs). Alphaproteobacteria was the most abundant class in both the sponge species. Unclassified species of phylum Candidatus Saccharibacteria from C. lobata and Chelotivorans composti from G. pumila were the most abundant bacterial species. The predominance of Alphaproteobacteria also revealed the occurrence of various xenobiotic-degrading, surfactant-producing bacterial genera in both the sponge species, indirectly indicating the possible polluted reef status of Palk Bay. Studies on sponge microbiomes at various understudied geographical locations might be helpful in predicting the status of reef environments.
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Affiliation(s)
- Ramu Meenatchi
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Pownraj Brindangnanam
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India.,Centre for Bioinformatics, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Saqib Hassan
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Kumarasamy Rathna
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - G Seghal Kiran
- Department of Food Science and Technology, School of Lifesciences, Pondicherry University, Puducherry, India
| | - Joseph Selvin
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India.
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55
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Lima NM, Andrade TJAS, Silva DHS. Dereplication of terpenes and phenolic compounds from Inga edulis extracts using HPLC-SPE-TT, RP-HPLC-PDA and NMR spectroscopy. Nat Prod Res 2020; 36:488-492. [PMID: 32614623 DOI: 10.1080/14786419.2020.1786824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Inga edulis is traditionally used as anti-inflammatory and antidiarrheal and has been investigated as potential sources of biologically active natural products. In this study, dereplication strategy using HPLC-SPE-TT, RP-HPLC-PDA and NMR spectroscopy was employed, and this resulted in the identification of sixteen compounds from the leaves extract of I. edulis, including four triterpenes (lupeol, α-amirin, olean-18-ene acid and frideline), three flavonoids, eight phenolic acids, an anthocyanin derived from delphinidin-3-glycoside and a mixture of five acylated anthocyanins. The chemical identification was performed based on NMR data, chemosystematics aspects, UV spectra and by comparison with the retention time and UV spectra of authentic standards. The metabolic profile of the species indicated the presence of phenolic compounds as major constituents justifying its strong antioxidant potential performed in β-carotene test. The techniques used have shown effective strategies for the early detection of active natural products from plant extracts, as these approaches are still crucially absent.[Formula: see text].
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Affiliation(s)
- Nerilson M Lima
- Nucleus of Bioassays, Biosynthesis and Ecophysiology of Natural Products (NuBBE), Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
| | - Teresinha J A S Andrade
- Nucleus of Applied Research to Sciences-NIAC, Federal Institute of Education, Science and Technology of Maranhão-IFMA, Timon, Maranhão, Brazil
| | - Dulce Helena S Silva
- Nucleus of Bioassays, Biosynthesis and Ecophysiology of Natural Products (NuBBE), Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil
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Sayed AM, Alhadrami HA, El-Gendy AO, Shamikh YI, Belbahri L, Hassan HM, Abdelmohsen UR, Rateb ME. Microbial Natural Products as Potential Inhibitors of SARS-CoV-2 Main Protease (M pro). Microorganisms 2020; 8:E970. [PMID: 32610445 PMCID: PMC7409236 DOI: 10.3390/microorganisms8070970] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 06/26/2020] [Accepted: 06/27/2020] [Indexed: 12/18/2022] Open
Abstract
The main protease (Mpro) of the newly emerged severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was subjected to hyphenated pharmacophoric-based and structural-based virtual screenings using a library of microbial natural products (>24,000 compounds). Subsequent filtering of the resulted hits according to the Lipinski's rules was applied to select only the drug-like molecules. Top-scoring hits were further filtered out depending on their ability to show constant good binding affinities towards the molecular dynamic simulation (MDS)-derived enzyme's conformers. Final MDS experiments were performed on the ligand-protein complexes (compounds 1-12, Table S1) to verify their binding modes and calculate their binding free energy. Consequently, a final selection of six compounds (1-6) was proposed to possess high potential as anti-SARS-CoV-2 drug candidates. Our study provides insight into the role of the Mpro structural flexibility during interactions with the possible inhibitors and sheds light on the structure-based design of anti-coronavirus disease 2019 (COVID-19) therapeutics targeting SARS-CoV-2.
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Affiliation(s)
- Ahmed M. Sayed
- Department of Pharmacognosy, Faculty of Pharmacy, Nahda University, 62513 Beni-Suef, Egypt;
| | - Hani A. Alhadrami
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
- Special Infectious Agent Unit, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Ahmed O. El-Gendy
- Department of Microbiology, Faculty of Pharmacy, Beni-Suef University, 62514Beni-Suef, Egypt;
| | - Yara I. Shamikh
- Department of Microbiology & Immunology, Nahda University, Beni-Suef 62513, Egypt;
- Department of Virology, Egypt Center for Research and Regenerative Medicine (ECRRM), 11517 Cairo, Egypt
| | - Lassaad Belbahri
- Laboratory of Soil Biology, Department of Biology, University of Neuchatel, 2000 Neuchatel, Switzerland;
| | - Hossam M. Hassan
- Department of Pharmacognosy, Faculty of Pharmacy, Beni-Suef University, 62514 Beni-Suef, Egypt;
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, 61519 Minia, Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, 61111 New Minia, Egypt
| | - Mostafa E. Rateb
- School of Computing, Engineering & Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK
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57
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Matroodi S, Siitonen V, Baral B, Yamada K, Akhgari A, Metsä-Ketelä M. Genotyping-Guided Discovery of Persiamycin A From Sponge-Associated Halophilic Streptomonospora sp. PA3. Front Microbiol 2020; 11:1237. [PMID: 32582127 PMCID: PMC7296137 DOI: 10.3389/fmicb.2020.01237] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 05/14/2020] [Indexed: 12/16/2022] Open
Abstract
Microbial natural products have been a cornerstone of the pharmaceutical industry, but the supply of novel bioactive secondary metabolites has diminished due to extensive exploration of the most easily accessible sources, namely terrestrial Streptomyces species. The Persian Gulf is a unique habitat for marine sponges, which contain diverse communities of microorganisms including marine Actinobacteria. These exotic ecosystems may cradle rare actinomycetes with high potential to produce novel secondary metabolites. In this study, we harvested 12 different species of sponges from two locations in the Persian Gulf and isolated 45 symbiotic actinomycetes to assess their biodiversity and sponge-microbe relationships. The isolates were classified into Nocardiopsis (24 isolates), Streptomyces (17 isolates) and rare genera (4 isolates) by 16S rRNA sequencing. Antibiotic activity tests revealed that culture extracts from half of the isolates displayed growth inhibitory effects against seven pathogenic bacteria. Next, we identified five strains with the genetic potential to produce aromatic polyketides by genotyping ketosynthase genes responsible for synthesis of carbon scaffolds. The combined data led us to focus on Streptomonospora sp. PA3, since the genus has rarely been examined for its capacity to produce secondary metabolites. Analysis of culture extracts led to the discovery of a new bioactive aromatic polyketide denoted persiamycin A and 1-hydroxy-4-methoxy-2-naphthoic acid. The genome harbored seven gene clusters involved in secondary metabolism, including a tetracenomycin-type polyketide synthase pathway likely involved in persiamycin formation. The work demonstrates the use of multivariate data and underexplored ecological niches to guide the drug discovery process for antibiotics and anticancer agents.
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Affiliation(s)
- Soheila Matroodi
- Laboratory of Biotechnology, Department of Marine Biology, Faculty of Marine Science and Oceanography, Khorramshahr University of Marine Science and Technology, Khorramshahr, Iran
- Laboratory of Antibiotic Biosynthesis Engineering, Department of Biochemistry, University of Turku, Turku, Finland
| | - Vilja Siitonen
- Laboratory of Antibiotic Biosynthesis Engineering, Department of Biochemistry, University of Turku, Turku, Finland
| | - Bikash Baral
- Laboratory of Antibiotic Biosynthesis Engineering, Department of Biochemistry, University of Turku, Turku, Finland
| | - Keith Yamada
- Laboratory of Antibiotic Biosynthesis Engineering, Department of Biochemistry, University of Turku, Turku, Finland
| | - Amir Akhgari
- Laboratory of Antibiotic Biosynthesis Engineering, Department of Biochemistry, University of Turku, Turku, Finland
| | - Mikko Metsä-Ketelä
- Laboratory of Antibiotic Biosynthesis Engineering, Department of Biochemistry, University of Turku, Turku, Finland
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58
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Liu T, Wu S, Zhang R, Wang D, Chen J, Zhao J. Diversity and antimicrobial potential of Actinobacteria isolated from diverse marine sponges along the Beibu Gulf of the South China Sea. FEMS Microbiol Ecol 2020; 95:5519852. [PMID: 31210273 DOI: 10.1093/femsec/fiz089] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 06/12/2019] [Indexed: 01/03/2023] Open
Abstract
Marine sponge-associated microorganisms have proven to be a very promising source of biologically active and pharmaceutically important natural products. In this study, we investigated the diversity and antibacterial potential of bacteria from 49 sponge species isolated from the Beibu Gulf, South China Sea, belonging to 16 genera and several unidentified taxa. Using a variety of selective media, 363 strains with different morphologies were identified to six bacterial taxa, including Proteobacteria (α-subgroup 85 and γ-subgroup 59), Actinobacteria (123), Firmicutes (90), Bacteroidetes (5) and Brevundimonas (1). Media ISP2 and R2A were the most effective for isolating Actinobacteria. One hundred and twenty-three actinobacterial strains clustered into 21 genera identified by 16S rDNA gene sequencing, most of which were from the genus Microbacterium, followed by Pseudonocardia, Streptomyces, Kocuria, Aeromicrobium, Brachybacterium and Nocardiopsis, constituted 82% of total actinobacterial isolates. By using the minimal medium, 92 actinobacterial isolates showed antimicrobial activities, and 51 strains displayed moderate to strong antimicrobial activity that inhibited the growth of more than half of the bacteria tested in this study. Functional genes related to secondary metabolites were screened, revealing that 10% (12/123) of actinobacterial isolates contained PKS-KS genes, 18% (22/123) harbored NRPS-A genes and 6% (7/123) had hybrid PKS-NRPS gene clusters. The sponges Haliclona sp., Callyspongia sp. and Desmacella sp., belonging to class Demonspongiae, and Leucaltis sp. from the class Calcarea, were dominant hosts, harboring the most diverse actinobacterial genera with stronger antimicrobial activities and more diverse PKS/NRPS genes.
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Affiliation(s)
- Tan Liu
- College of Ocean and Earth Science of Xiamen University, Xiamen, 361005, China
| | - Shufei Wu
- College of Ocean and Earth Science of Xiamen University, Xiamen, 361005, China
| | - Ruizhen Zhang
- College of Ocean and Earth Science of Xiamen University, Xiamen, 361005, China
| | - Dexiang Wang
- College of Ocean and Earth Science of Xiamen University, Xiamen, 361005, China
| | - Jun Chen
- College of Ocean and Earth Science of Xiamen University, Xiamen, 361005, China
| | - Jing Zhao
- College of Ocean and Earth Science of Xiamen University, Xiamen, 361005, China
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59
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Actinomycetes from the Red Sea Sponge Coscinoderma mathewsi: Isolation, Diversity, and Potential for Bioactive Compounds Discovery. Microorganisms 2020; 8:microorganisms8050783. [PMID: 32456212 PMCID: PMC7285244 DOI: 10.3390/microorganisms8050783] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 05/21/2020] [Accepted: 05/21/2020] [Indexed: 12/26/2022] Open
Abstract
The diversity of actinomycetes associated with the marine sponge Coscinoderma mathewsi collected from Hurghada (Egypt) was studied. Twenty-three actinomycetes were separated and identified based on the 16S rDNA gene sequence analysis. Out of them, three isolates were classified as novel species of the genera Micromonospora, Nocardia, and Gordonia. Genome sequencing of actinomycete strains has revealed many silent biosynthetic gene clusters and has shown their exceptional capacity for the production of secondary metabolites, not observed under classical cultivation conditions. Therefore, the effect of mycolic-acid-containing bacteria or mycolic acid on the biosynthesis of cryptic natural products was investigated. Sponge-derived actinomycete Micromonospora sp. UA17 was co-cultured using liquid fermentation with two mycolic acid-containing actinomycetes (Gordonia sp. UA19 and Nocardia sp. UA 23), or supplemented with pure mycolic acid. LC-HRESIMS data were analyzed to compare natural production across all crude extracts. Micromonospora sp. UA17 was rich with isotetracenone, indolocarbazole, and anthracycline analogs. Some co-culture extracts showed metabolites such as a chlorocardicin, neocopiamycin A, and chicamycin B that were not found in the respective monocultures, suggesting a mycolic acid effect on the induction of cryptic natural product biosynthetic pathways. The antibacterial, antifungal, and antiparasitic activities for the different cultures extracts were also tested.
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Abstract
Marine natural products (MNPs) containing pyrone rings have been isolated
from numerous marine organisms, and also produced by marine fungi and bacteria, particularly,
actinomycetes. They constitute a versatile structure unit of bioactive natural
products that exhibit various biological activities such as antibiotic, antifungal, cytotoxic,
neurotoxic, phytotoxic and anti-tyrosinase. The two structure isomers of pyrone ring are γ-
pyrone and α-pyrone. In terms of chemical motif, γ-pyrone is the vinologous form of α-
pyrone which possesses a lactone ring. Actinomycete bacteria are responsible for the production
of several α-pyrone compounds such as elijopyrones A-D, salinipyrones and violapyrones
etc. to name a few. A class of pyrone metabolites, polypropionates which have
fascinating carbon skeleton, is primarily produced by marine molluscs. Interestingly, some
of the pyrone polytketides which are found in cone snails are actually synthesized by actinomycete bacteria.
Several pyrone derivatives have been obtained from marine fungi such as Aspergillums flavus, Altenaria sp.,
etc. The γ-pyrone derivative namely, kojic acid obtained from Aspergillus fungus has high commercial demand
and finds various applications. Kojic acid and its derivative displayed inhibition of tyrosinase activity and, it is
also extensively used as a ligand in coordination chemistry. Owing to their commercial and biological significance,
the synthesis of pyrone containing compounds has been given attention over the past years. Few reviews
on the total synthesis of pyrone containing natural products namely, polypropionate metabolites have been reported.
However, these reviews skipped other marine pyrone metabolites and also omitted discussion on isolation
and detailed biological activities. This review presents a brief account of the isolation of marine metabolites
containing a pyrone ring and their reported bio-activities. Further, the review covers the synthesis of marine
pyrone metabolites such as cyercene-A, placidenes, onchitriol-I, onchitriol-II, crispatene, photodeoxytrichidione,
(-) membrenone-C, lihualide-B, macrocyclic enol ethers and auripyrones-A & B.
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Affiliation(s)
- Keisham S. Singh
- Bio-organic Chemistry Laboratory, CSIR-National Institute of Oceanography, Dona Paula-403004, Goa, India
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61
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Vignesh A, Manigundan K, Santhoshkumar J, Shanmugasundaram T, Gopikrishnan V, Radhakrishnan M, Joseph J, Ayyasamy PM, Kumar GD, Meganathan R, Balagurunathan R. Microbial degradation, spectral analysis and toxicological assessment of malachite green by Streptomyces chrestomyceticus S20. Bioprocess Biosyst Eng 2020; 43:1457-1468. [PMID: 32249356 DOI: 10.1007/s00449-020-02339-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 03/26/2020] [Indexed: 12/15/2022]
Abstract
Malachite green (MG), a triphenylmethane dye is extensively used for coloring silk, aquaculture and textile industries, it has also has been reported toxic to life forms. This study aimed to investigate the biodegradation potential of MG by actinobacteria. The potent actinobacterial strain S20 used in this study was isolated from forest soil (Sabarimala, Kerala, India) and identified as Streptomyces chrestomyceticus based on phenotype and molecular features. Strain S20 degraded MG up to 59.65 ± 0.68% was studied in MSM medium and MG (300 mg l-1) and degradation was increased (90-99%) by additions of 1% glucose and yeast extract into the medium at pH 7. The treated metabolites from MG by S20 characterized by FT-IR and GC-MS. The results showed MG has been degraded into nontoxic compounds evaluated by (1) phytotoxic assay on Vigna radiata, (2) microbial toxicity on Staphylococcus aureus, Bacillus subtilis, Micrococcus luteus, Streptococcus sp. and Escherichia coli, (3) cytotoxicity assay in a human cell line (MCF 7). The toxicity studies demonstrated that the byproducts from MG degradation by S. chrestomyceticus S20 were no toxic to plants and microbes and less toxic to human cells as compared to the parent MG. Perhaps this is the first work reported on biodegradation of MG by S. chrestomyceticus which could be a potential candidate for the removal of MG from various environments.
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Affiliation(s)
- Angamuthu Vignesh
- Centre for Drug Discovery and Development, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Chennai, 600 119, Tamil Nadu, India
| | - Kaari Manigundan
- Centre for Drug Discovery and Development, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Chennai, 600 119, Tamil Nadu, India
| | - Jayakodi Santhoshkumar
- School of Bioscience and Technology, VIT University, Tamil Nadu, Vellore, 632 014, India
| | | | - Venugopal Gopikrishnan
- Centre for Drug Discovery and Development, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Chennai, 600 119, Tamil Nadu, India
| | - Manikkam Radhakrishnan
- Centre for Drug Discovery and Development, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Chennai, 600 119, Tamil Nadu, India.
| | - Jerrine Joseph
- Centre for Drug Discovery and Development, Col. Dr. Jeppiaar Research Park, Sathyabama Institute of Science and Technology, Chennai, 600 119, Tamil Nadu, India
| | | | - Govindaraj Dev Kumar
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, 20742, USA
| | - Ramakodi Meganathan
- CSIR-National Environmental Engineering Research Institute (NEERI), Hyderabad Zonal Centre, IICT-Campus, Tarnaka, Hyderabad, Telangana, 500 007, India
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Dereplication Analysis and Antitrypanosomal Potential of the Red Sea Sponge Amphimedon sp. Supported by Molecular Modelling. ACTA ACUST UNITED AC 2020. [DOI: 10.1007/s43450-020-00053-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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63
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Akbar N, Siddiqui R, Sagathevan K, Khan NA. Gut bacteria of animals living in polluted environments exhibit broad-spectrum antibacterial activities. Int Microbiol 2020; 23:511-526. [PMID: 32124096 DOI: 10.1007/s10123-020-00123-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 01/21/2020] [Accepted: 02/07/2020] [Indexed: 12/18/2022]
Abstract
Infectious diseases, in particular bacterial infections, are the leading cause of morbidity and mortality posing a global threat to human health. The emergence of antibiotic resistance has exacerbated the problem further. Hence, there is a need to search for novel sources of antibacterials. Herein, we explored gut bacteria of a variety of animals living in polluted environments for their antibacterial properties against multi-drug resistant pathogenic bacteria. A variety of species were procured including invertebrate species, Blaptica dubia (cockroach), Gromphadorhina portentosa (cockroach), Scylla serrata (crab), Grammostola rosea (tarantula), Scolopendra subspinipes (centipede) and vertebrate species including Varanus salvator (water monitor lizard), Malayopython reticulatus (python), Cuora amboinensis (tortoise), Oreochromis mossambicus (tilapia fish), Rattus rattus (rat), Gallus gallus domesticus (chicken) and Lithobates catesbeianus (frog). Gut bacteria of these animals were isolated and identified using microbiological, biochemical, analytical profiling index (API) and through molecluar identification using 16S rRNA sequencing. Bacterial conditioned media (CM) were prepared and tested against selected Gram-positive and Gram-negative pathogenic bacteria as well as human cells (HaCaT). The results revealed that CM exhibited significant broad-spectrum antibacterial activities. Upon heat inactivation, CM retained their antibacterial properties suggesting that this effect may be due to secondary metabolites or small peptides. CM showed minimal cytotoxicity against human cells. These findings suggest that gut bacteria of animals living in polluted environments produce broad-spectrum antibacterial molecule(s). The molecular identity of the active molecule(s) together with their mode of action is the subject of future studies which could lead to the rational development of novel antibacterial(s).
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Affiliation(s)
- Noor Akbar
- Department of Biological Sciences, School of Science and Technology, Sunway University, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia
| | - Ruqaiyyah Siddiqui
- Department of Biology, Chemistry and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, University City, 26666, Sharjah, United Arab Emirates
| | - K Sagathevan
- Department of Biological Sciences, School of Science and Technology, Sunway University, Bandar Sunway, 47500, Petaling Jaya, Selangor, Malaysia
| | - Naveed Ahmed Khan
- Department of Biology, Chemistry and Environmental Sciences, College of Arts and Sciences, American University of Sharjah, University City, 26666, Sharjah, United Arab Emirates.
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Sharma AR, Harunari E, Oku N, Matsuura N, Trianto A, Igarashi Y. Two antibacterial and PPARα/γ-agonistic unsaturated keto fatty acids from a coral-associated actinomycete of the genus Micrococcus. Beilstein J Org Chem 2020; 16:297-304. [PMID: 32256847 PMCID: PMC7082699 DOI: 10.3762/bjoc.16.29] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 02/14/2020] [Indexed: 01/01/2023] Open
Abstract
A pair of geometrically isomeric unsaturated keto fatty acids, (6E,8Z)- and (6E,8E)-5-oxo-6,8-tetradecadienoic acids (1 and 2), were isolated from the culture broth of an actinomycete of the genus Micrococcus, which was associated with a stony coral, Catalaphyllia sp. Their chemical structures were elucidated by spectroscopic analysis including NMR and MS, with special assistance of spin system simulation studies for the assignment of an E geometry at C8 in 2. As metabolites of microbes, compounds 1 and 2 are unprecedented in terms of bearing a 2,4-dienone system. Both 1 and 2 showed antibacterial activity against the plant pathogen Rhizobium radiobacter and the fish pathogen Tenacibaculum maritimum, with a contrasting preference that 1 is more effective to the former strain while 2 is so to the latter. In addition, compounds 1 and 2 displayed agonistic activity against peroxisome proliferator-activated receptors (PPARs) with an isoform specificity towards PPARα and PPARγ.
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Affiliation(s)
- Amit Raj Sharma
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Enjuro Harunari
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Naoya Oku
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
| | - Nobuyasu Matsuura
- Okayama University of Science, 1-1 Ridaicho, Okayama 700-0005, Japan
| | - Agus Trianto
- Faculty of Fisheries and Marine Sciences, Diponegoro University, Tembalang Campus, St. Prof. Soedarto SH., Semarang 50275, Central Java, Indonesia
| | - Yasuhiro Igarashi
- Biotechnology Research Center and Department of Biotechnology, Toyama Prefectural University, 5180 Kurokawa, Imizu, Toyama 939-0398, Japan
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65
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Yang C, Qian R, Xu Y, Yi J, Gu Y, Liu X, Yu H, Jiao B, Lu X, Zhang W. Marine Actinomycetes-derived Natural Products. Curr Top Med Chem 2020; 19:2868-2918. [PMID: 31724505 DOI: 10.2174/1568026619666191114102359] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 09/02/2019] [Accepted: 09/22/2019] [Indexed: 12/12/2022]
Abstract
Actinomycetes is an abundant resource for discovering a large number of lead compounds, which play an important role in microbial drug discovery. Compared to terrestrial microorganisms, marine actinomycetes have unique metabolic pathways because of their special living environment, which has the potential to produce a variety of bioactive substances. In this paper, secondary metabolites isolated from marine actinomycetes are reviewed (2013-2018), most of which exhibited cytotoxic, antibacterial, and antiviral biological activities.
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Affiliation(s)
- Chengfang Yang
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Rui Qian
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Yao Xu
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Junxi Yi
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Yiwen Gu
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Xiaoyu Liu
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Haobing Yu
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Binghua Jiao
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Xiaoling Lu
- College of Basic Medical Sciences, Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
| | - Wei Zhang
- Centre for Marine Bioproducts Development, Flinders University, Adelaide, Australia.,Department of Medical Biotechnology, School of Medicine, Flinders University, Adelaide, Australia
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66
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Abstract
The marine environment encompasses a huge biological diversity and can be considered as an underexplored location for prospecting bioactive molecules. In this review, the current state of art about antimicrobial molecules from marine bacteria has been summarized considering the main phylum and sources evolved in a marine environment. Considering the last two decades, we have found as most studied group of bacteria producers of substances with antimicrobial activity is the Firmicutes phylum, in particular strains of the Bacillus genus. The reason for that can be attributed to the difficult cultivation of typical Actinobacteria from a marine sediment, whose members are the major producers of antimicrobial substances in land environments. However, a reversed trend has been observed in recent years with an increasing number of reports settling on Actinobacteria. Great diversity of chemical structures have been identified, such as fijimicyns and lynamicyns from Actinomycetes and macrolactins produced by Bacillus.
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Affiliation(s)
- Paolo Stincone
- Laboratório de Bioquímica e Microbiologia Aplicada, Departamento de Ciência de Alimentos, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Adriano Brandelli
- Laboratório de Bioquímica e Microbiologia Aplicada, Departamento de Ciência de Alimentos, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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67
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Sebak M, Saafan AE, AbdelGhani S, Bakeer W, El-Gendy AO, Espriu LC, Duncan K, Edrada-Ebel R. Bioassay- and metabolomics-guided screening of bioactive soil actinomycetes from the ancient city of Ihnasia, Egypt. PLoS One 2019; 14:e0226959. [PMID: 31887193 PMCID: PMC6936774 DOI: 10.1371/journal.pone.0226959] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 12/10/2019] [Indexed: 11/18/2022] Open
Abstract
Literature surveys, taxonomical differences, and bioassay results have been utilized in the discovery of new natural products to aid in Actinomycetes isolate-selection. However, no or less investigation have been done on establishing the differences in metabolomic profiles of the isolated microorganisms. The study aims to utilise bioassay- and metabolomics-guided tools that included dereplication study and multivariate analysis of the NMR and mass spectral data of microbial extracts to assist the selection of isolates for scaling-up the production of antimicrobial natural products. A total of 58 actinomycetes were isolated from different soil samples collected from Ihnasia City, Egypt and screened for their antimicrobial activities against indicator strains that included Bacillus subtilis, Escherichia coli, methicillin-resistant Staphylococcus aureus and Candida albicans. A number of 25 isolates were found to be active against B. subtilis and/or to at least one of the tested indicator strains. Principal component analyses showed chemical uniqueness for four outlying bioactive actinomycetes extracts. In addition, Orthogonal Projections to Latent Structures Discriminant Analysis (OPLS-DA) and dereplication study led us to further select two outlying anti-MRSA active isolates MS.REE.13 and 22 for scale-up work. MS.REE.13 and 22 exhibited zones of inhibition at 19 and 13 mm against MRSA, respectively. A metabolomics-guided approach provided the steer to target the bioactive metabolites (P<0.01) present in a crude extract or fraction even at nanogram levels but it was a challenge that such low-yielding bioactive natural products would be feasible to isolate. Validated to occur only on the active side of OPLS-DA loadings plot, the isolated compounds exhibited medium to weak antibiotic activity with MIC values between 250 and 800 μM. Two new compounds, P_24306 (C10H13N2) and N_12799 (C18H32O3) with MICs of 795 and 432 μM, were afforded from the scale-up of MS.REE. 13 and 22, respectively.
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Affiliation(s)
- Mohamed Sebak
- Strathclyde Institute of Pharmacy and Biomedical Sciences, Faculty of Science, University of Strathclyde, Glasgow, Scotland, United Kingdom
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Menoufia University, Shebin Elkom, Menoufia, Egypt
- * E-mail: (MS); (RE)
| | - Amal E. Saafan
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Menoufia University, Shebin Elkom, Menoufia, Egypt
- Microbiology and Immunology Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - Sameh AbdelGhani
- Microbiology and Immunology Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - Walid Bakeer
- Microbiology and Immunology Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - Ahmed O. El-Gendy
- Microbiology and Immunology Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - Laia Castaño Espriu
- Strathclyde Institute of Pharmacy and Biomedical Sciences, Faculty of Science, University of Strathclyde, Glasgow, Scotland, United Kingdom
| | - Katherine Duncan
- Strathclyde Institute of Pharmacy and Biomedical Sciences, Faculty of Science, University of Strathclyde, Glasgow, Scotland, United Kingdom
| | - RuAngelie Edrada-Ebel
- Strathclyde Institute of Pharmacy and Biomedical Sciences, Faculty of Science, University of Strathclyde, Glasgow, Scotland, United Kingdom
- * E-mail: (MS); (RE)
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68
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An "olivomycin A" derivative from a sponge-associated Streptomyces sp. strain SP 85. 3 Biotech 2019; 9:439. [PMID: 31750037 DOI: 10.1007/s13205-019-1964-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 10/22/2019] [Indexed: 12/25/2022] Open
Abstract
We isolated an actinobacterium, Streptomyces sp. strain SP 85 from the marine sponge Dysidea avara. Polyphasic identification of the microorganism showed that the strain SP 85 had high 16S rRNA gene similarity (99%) with Streptomyces olivaceus strain NBRC 12805, while some physiological and biochemical differences were observed. A cytotoxic compound, SP 85 was isolated from the active culture extract of the strain SP 85 by bioassay-guided purification over silica gel column chromatography, preparative TLC, and HPLC. The structure elucidation based on the spectroscopic analysis, including UV, ESI-MS, and 13C NMR data revealed that SP 85 compound is an analog of anti-tumor drug, "olivomycin A". The SP 85 compound showed high cytotoxic activity against three human cancer cell lines, including SW480, HepG2, and MCF7 with IC50 values of 16, 93, and 78 nM, respectively. SP 85 exhibited significantly (2-10 times) higher cytotoxicity against the tumor cell lines in comparison with HUVECs as the normal cell line, which also induced apoptosis in the tested cancerous cell line. This is the first report on the production of an "olivomycin A" derivative by a sponge-associated Streptomyces, showing the great potential of sponge-associated actinobacteria in producing cytotoxic natural products.
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69
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Kaliyaraj D, Rajendran M, Angamuthu V, Antony AR, Kaari M, Thangavel S, Venugopal G, Joseph J, Manikkam R. Bioleaching of heavy metals from printed circuit board (PCB) by Streptomyces albidoflavus TN10 isolated from insect nest. BIORESOUR BIOPROCESS 2019. [DOI: 10.1186/s40643-019-0283-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Abstract
Background
E-waste management is extremely difficult to exercise owing to its complexity and hazardous nature. Printed circuit boards (PCBs) are the core components of electrical and electronic equipment, which generally consist of polymers, ceramics, and heavy metals.
Results
The present study has been attempted for removal of heavy metals from printed circuit board by metal-resistant actinobacterium Streptomyces albidoflavus TN10 isolated from the termite nest. This bacterium was found to recover different heavy metals (Al 66%, Ca 74%, Cu 68%, Cd 65%, Fe 42%, Ni 81%, Zn 82%, Ag 56%, Pb 46%) within 72 h under laboratory conditions. The metal content of PCB after bioleaching was analyzed by ICP-MS. The crude PCB and bioleaching residue were characterized by FT-IR, XRD, SEM for the determination of structural and functional group changes for confirmation of bioleaching.
Conclusion
The findings of the present study concluded that Streptomyces albidoflavus TN10 is a promising candidate for bioleaching of heavy metals from the printed circuit board as an eco-friendly and cost-effective process.
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70
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Guo ZK, Wang R, Liu TM, Chen FX, Yang MQ. A new flavonoid derivative and a new 5-hydroxyanthranilic acid derivative from the sea urchin-derived Streptomyces sp. HDa1. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2019; 21:992-998. [PMID: 29972031 DOI: 10.1080/10286020.2018.1485663] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
One new flavonoid derivative flavoside A (1), one new 5-hydroxyanthranilic acid derivative crassilin (2), along with the known angucyclinone PD116740 (3) and oxachelin (4), was isolated from the EtOAc extract of the fermentation broth of the sea urchin (Anthocidaris crassispina)-derived actinobacterium, Streptomyces sp. HD01. The structures of these compounds were established on the basis of their HR-ESI-MS and NMR spectroscopic data. All of these compounds were assessed for their antibacterial activity.
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Affiliation(s)
- Zhi-Kai Guo
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences , Haikou 571101 , China
| | - Rong Wang
- Hainan Academy of Ocean and Fisheries Sciences , Haikou 570206 , China
| | - Tian-Mi Liu
- Hainan Testing Center for the Quality and Safety of Aquatic Products , Haikou 570206 , China
| | - Fu-Xiao Chen
- Hainan Academy of Ocean and Fisheries Sciences , Haikou 570206 , China
| | - Ming-Qiu Yang
- Hainan Academy of Ocean and Fisheries Sciences , Haikou 570206 , China
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71
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Phylogenetic Analysis and Screening of Antimicrobial and Antiproliferative Activities of Culturable Bacteria Associated with the Ascidian Styela clava from the Yellow Sea, China. BIOMED RESEARCH INTERNATIONAL 2019; 2019:7851251. [PMID: 31559313 PMCID: PMC6735190 DOI: 10.1155/2019/7851251] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/04/2019] [Accepted: 07/28/2019] [Indexed: 01/01/2023]
Abstract
Over 1,000 compounds, including ecteinascidin-743 and didemnin B, have been isolated from ascidians, with most having bioactive properties such as antimicrobial, antitumor, and enzyme-inhibiting activities. In recent years, direct and indirect evidence has shown that some bioactive compounds isolated from ascidians are not produced by ascidians themselves but by their symbiotic microorganisms. Isolated culturable bacteria associated with ascidians and investigating their potential bioactivity are an important approach for discovering novel compounds. In this study, a total of 269 bacteria were isolated from the ascidian Styela clava collected from the coast of Weihai in the north of the Yellow Sea, China. Phylogenetic relationships among 183 isolates were determined using their 16S rRNA gene sequences. Isolates were tested for antimicrobial activity against seven indicator strains, and an antiproliferative activity assay was performed to test for inhibition of human hepatocellular carcinoma Bel 7402 and human cervical carcinoma HeLa cell proliferation. Our results showed that the isolates belonged to 26 genera from 18 families in four phyla (Firmicutes, Actinobacteria, Proteobacteria, and Bacteroidetes). Bacillus and Streptomyces were the most dominant genera; 146 strains had potent antimicrobial activities and inhibited at least one of the indicator strains. Crude extracts from 29 strains showed antiproliferative activity against Bel 7402 cells with IC50 values below 500 μg·mL-1, and 53 strains showed antiproliferative activity against HeLa cells, with IC50 values less than 500 μg·mL-1. Our results suggest that culturable bacteria associated with the ascidian Styela clava may be a promising source of novel bioactive compounds.
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72
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Almeida EL, Carrillo Rincón AF, Jackson SA, Dobson ADW. Comparative Genomics of Marine Sponge-Derived Streptomyces spp. Isolates SM17 and SM18 With Their Closest Terrestrial Relatives Provides Novel Insights Into Environmental Niche Adaptations and Secondary Metabolite Biosynthesis Potential. Front Microbiol 2019; 10:1713. [PMID: 31404169 PMCID: PMC6676996 DOI: 10.3389/fmicb.2019.01713] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 07/11/2019] [Indexed: 12/28/2022] Open
Abstract
The emergence of antibiotic resistant microorganisms has led to an increased need for the discovery and development of novel antimicrobial compounds. Frequent rediscovery of the same natural products (NPs) continues to decrease the likelihood of the discovery of new compounds from soil bacteria. Thus, efforts have shifted toward investigating microorganisms and their secondary metabolite biosynthesis potential, from diverse niche environments, such as those isolated from marine sponges. Here we investigated at the genomic level two Streptomyces spp. strains, namely SM17 and SM18, isolated from the marine sponge Haliclona simulans, with previously reported antimicrobial activity against clinically relevant pathogens; using single molecule real-time (SMRT) sequencing. We performed a series of comparative genomic analyses on SM17 and SM18 with their closest terrestrial relatives, namely S. albus J1074 and S. pratensis ATCC 33331 respectively; in an effort to provide further insights into potential environmental niche adaptations (ENAs) of marine sponge-associated Streptomyces, and on how these adaptations might be linked to their secondary metabolite biosynthesis potential. Prediction of secondary metabolite biosynthetic gene clusters (smBGCs) indicated that, even though the marine isolates are closely related to their terrestrial counterparts at a genomic level; they potentially produce different compounds. SM17 and SM18 displayed a better ability to grow in high salinity medium when compared to their terrestrial counterparts, and further analysis of their genomes indicated that they possess a pool of 29 potential ENA genes that are absent in S. albus J1074 and S. pratensis ATCC 33331. This ENA gene pool included functional categories of genes that are likely to be related to niche adaptations and which could be grouped based on potential biological functions such as osmotic stress, defense; transcriptional regulation; symbiotic interactions; antimicrobial compound production and resistance; ABC transporters; together with horizontal gene transfer and defense-related features.
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Affiliation(s)
| | | | - Stephen A. Jackson
- School of Microbiology, University College Cork, Cork, Ireland
- Environmental Research Institute, University College Cork, Cork, Ireland
| | - Alan D. W. Dobson
- School of Microbiology, University College Cork, Cork, Ireland
- Environmental Research Institute, University College Cork, Cork, Ireland
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73
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Wang RJ, Zhang SY, Ye YH, Yu Z, Qi H, Zhang H, Xue ZL, Wang JD, Wu M. Three New Isoflavonoid Glycosides from the Mangrove-Derived Actinomycete Micromonospora aurantiaca 110B. Mar Drugs 2019; 17:md17050294. [PMID: 31108876 PMCID: PMC6562861 DOI: 10.3390/md17050294] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2019] [Accepted: 05/13/2019] [Indexed: 11/16/2022] Open
Abstract
The mangrove ecosystem is a rich resource for the discovery of actinomycetes with potential applications in pharmaceutical science. Besides the genus Streptomyces, Micromonospora is also a source of new bioactive agents. We screened Micromonospora from the rhizosphere soil of mangrove plants in Fujian province, China, and 51 strains were obtained. Among them, the extracts of 12 isolates inhibited the growth of human lung carcinoma A549 cells. Strain 110B exhibited better cytotoxic activity, and its bioactive constituents were investigated. Consequently, three new isoflavonoid glycosides, daidzein-4'-(2-deoxy-α-l-fucopyranoside) (1), daidzein-7-(2-deoxy-α-l-fucopyranoside) (2), and daidzein-4',7-di-(2-deoxy-α-l-fucopyranoside) (3) were isolated from the fermentation broth of strain 110B. The structures of the new compounds were determined by spectroscopic methods, including 1D and 2D nuclear magnetic resonance (NMR) and high-resolution electrospray ionization mass spectrometry (HR-ESIMS). The result of medium-changing experiments implicated that these new compounds were microbial biotransformation products of strain M. aurantiaca 110B. The three compounds displayed moderate cytotoxic activity to the human lung carcinoma cell line A549, hepatocellular liver carcinoma cell line HepG2, and the human colon tumor cell line HCT116, whereas none of them showed antifungal or antibacterial activities.
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Affiliation(s)
- Rui-Jun Wang
- Ocean College, Zhejiang University, Zhoushan 316021, China.
| | - Shao-Yong Zhang
- Zhejiang Key Laboratory of Antifungal Drugs, Zhejiang Hisun Pharmaceutical Co., Ltd., Taizhou 318000, China.
| | - Yang-Hui Ye
- Ocean College, Zhejiang University, Zhoushan 316021, China.
| | - Zhen Yu
- Zhejiang Key Laboratory of Antifungal Drugs, Zhejiang Hisun Pharmaceutical Co., Ltd., Taizhou 318000, China.
| | - Huan Qi
- Zhejiang Key Laboratory of Antifungal Drugs, Zhejiang Hisun Pharmaceutical Co., Ltd., Taizhou 318000, China.
| | - Hui Zhang
- Zhejiang Key Laboratory of Antifungal Drugs, Zhejiang Hisun Pharmaceutical Co., Ltd., Taizhou 318000, China.
| | - Zheng-Lian Xue
- College of Biochemical Engineering, Anhui Polytechnic University, Wuhu 241000, China.
| | - Ji-Dong Wang
- College of Biochemical Engineering, Anhui Polytechnic University, Wuhu 241000, China.
- Zhejiang Key Laboratory of Antifungal Drugs, Zhejiang Hisun Pharmaceutical Co., Ltd., Taizhou 318000, China.
| | - Min Wu
- Ocean College, Zhejiang University, Zhoushan 316021, China.
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74
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Girão M, Ribeiro I, Ribeiro T, Azevedo IC, Pereira F, Urbatzka R, Leão PN, Carvalho MF. Actinobacteria Isolated From Laminaria ochroleuca: A Source of New Bioactive Compounds. Front Microbiol 2019; 10:683. [PMID: 31024480 PMCID: PMC6465344 DOI: 10.3389/fmicb.2019.00683] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 03/19/2019] [Indexed: 01/04/2023] Open
Abstract
Nature is the major reservoir of biologically active molecules. The urgent need of finding novel molecules for pharmaceutical application is prompting the research of underexplored environments, such as marine ecosystems. Here, we investigated cultivable actinobacteria associated with the macroalgae Laminaria ochroleuca and assessed their potential to produce compounds with antimicrobial or anticancer activities. A specimen of L. ochroleuca was collected in a rocky shore in northern Portugal, and fragments of tissues from different parts of the macroalgae (holdfast, stipe, and blades) were surface sterilized and plated in three culture media selective for actinobacteria. A total of 90 actinobacterial strains were isolated, most of which affiliated with the genus Streptomyces. Isolates associated with the genera Isoptericola, Rhodococcus, Nonomuraeae, Nocardiopsis, Microbispora, and Microbacterium were also obtained. Organic extracts from the isolates were tested for their antimicrobial activity using the agar-based disk diffusion method, followed by determination of minimum inhibitory concentration (MIC) values. Forty-five isolates inhibited the growth of Candida albicans and/or Staphylococcus aureus, with MIC values ranging from <0.5 to 1000 μg mL−1. The actinobacterial isolates were also tested for their anticancer potential on two human cancer cell lines. Twenty-eight extracts affected the viability of at least one human cancer cell line (breast carcinoma T-47D and neuroblastoma SH-SY5Y) and non-carcinogenic endothelial cell line (hCMEC/D3). Seven extracts affected the viability of cancer cells only. This study revealed that L. ochroleuca is a rich source of actinobacteria with promising antimicrobial and anticancer activities and suggests that macroalgae may be a valuable source of actinobacteria and, consequently, of new molecules with biotechnological importance.
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Affiliation(s)
- Mariana Girão
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal.,Department of Biology, Faculty of Sciences, University of Porto, Porto, Portugal
| | - Inês Ribeiro
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Tiago Ribeiro
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Isabel C Azevedo
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Filipe Pereira
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Ralph Urbatzka
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Pedro N Leão
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
| | - Maria F Carvalho
- Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Porto, Portugal
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75
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Rangseekaew P, Pathom-Aree W. Cave Actinobacteria as Producers of Bioactive Metabolites. Front Microbiol 2019; 10:387. [PMID: 30967844 PMCID: PMC6438885 DOI: 10.3389/fmicb.2019.00387] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 02/13/2019] [Indexed: 11/13/2022] Open
Abstract
Recently, there is an urgent need for new drugs due to the emergence of drug resistant pathogenic microorganisms and new infectious diseases. Members of phylum Actinobacteria are promising source of bioactive compounds notably antibiotics. The search for such new compounds has shifted to extreme or underexplored environments to increase the possibility of discovery. Cave ecosystems have attracted interest of the research community because of their unique characteristics and the microbiome residing inside including actinobacteria. At the time of writing, 47 species in 30 genera of actinobacteria were reported from cave and cave related habitats. Novel and promising bioactive compounds have been isolated and characterized. This mini-review focuses on the diversity of cultivable actinobacteria in cave and cave-related environments, and their bioactive metabolites from 1999 to 2018.
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Affiliation(s)
- Pharada Rangseekaew
- Doctor of Philosophy Program in Applied Microbiology (International Program) in Faculty of Science, Chiang Mai University, Chiang Mai, Thailand.,Graduate School, Chiang Mai University, Chiang Mai, Thailand
| | - Wasu Pathom-Aree
- Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, Thailand.,Center of Excellence in Bioresources for Agriculture, Industry and Medicine, Chiang Mai University, Chiang Mai, Thailand
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76
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Huang X, Kong F, Zhou S, Huang D, Zheng J, Zhu W. Streptomyces tirandamycinicus sp. nov., a Novel Marine Sponge-Derived Actinobacterium With Antibacterial Potential Against Streptococcus agalactiae. Front Microbiol 2019; 10:482. [PMID: 30918502 PMCID: PMC6424883 DOI: 10.3389/fmicb.2019.00482] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 02/25/2019] [Indexed: 01/16/2023] Open
Abstract
A novel actinobacterium, strain HNM0039T, was isolated from a marine sponge sample collected at the coast of Wenchang, Hainan, China and its polyphasic taxonomy was studied. The isolate had morphological and chemical characteristics consistent with the genus Streptomyces. Based on the 16S rRNA gene sequence analysis, strain HNM0039T was closely related to Streptomyces wuyuanensis CGMCC 4.7042T (99.38%) and Streptomyces spongiicola HNM0071T (99.05%). The organism formed a well-delineated subclade with S. wuyuanensis CGMCC 4.7042T and S. spongiicola HNM0071T in the Streptomyces 16S rRNA gene tree. Multi-locus sequence analysis (MLSA) based on five house-keeping gene alleles (atpD, gyrB, rpoB, recA, trpB) further confirmed their relationship. DNA-DNA relatedness between strain HNM0039T and its closest type strains, namely S. wuyuanensis CGMCC 4.7042T and S. spongiicola HNM0071T, were 46.5 and 45.1%, respectively. The average nucleotide identity (ANI) between strain HNM0039T and its two neighbor strains were 89.65 and 91.44%, respectively. The complete genome size of strain HNM0039T was 7.2 Mbp, comprising 6226 predicted genes with DNA G+C content of 72.46 mol%. Thirty-one putative secondary metabolite biosynthetic gene clusters were also predicted in the genome of strain HNM0039T. Among them, the tirandamycin biosynthetic gene cluster has been characterized completely. The crude extract of strain HNM0039T exhibited potent antibacterial activity against Streptococcus agalactiae in Nile tilapia. And tirandamycins A and B were further identified as the active components with MIC values of 2.52 and 2.55 μg/ml, respectively. Based on genotypic and phenotypic characteristics, it is concluded that strain HNM0039T represents a novel species of the genus Streptomyces whose name was proposed as Streptomyces tirandamycinicus sp. nov. The type strain is HNM0039T (= CCTCC AA 2018045T = KCTC 49236T).
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Affiliation(s)
- Xiaolong Huang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Hainan University, Haikou, China
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
| | - Fandong Kong
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
| | - Shuangqing Zhou
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Hainan University, Haikou, China
| | - Dongyi Huang
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Hainan University, Haikou, China
| | - Jiping Zheng
- Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Hainan University, Haikou, China
| | - Weiming Zhu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao, China
- Open Studio for Druggability Research of Marine Natural Products, Pilot National Laboratory for Marine Science and Technology, Qingdao, China
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77
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Zhang XY, Hao HL, Lau SCK, Wang HY, Han Y, Dong LM, Huang RM. Biodiversity and antifouling activity of fungi associated with two soft corals from the South China Sea. Arch Microbiol 2019; 201:757-767. [PMID: 30840101 DOI: 10.1007/s00203-019-01639-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 02/07/2019] [Accepted: 02/19/2019] [Indexed: 11/28/2022]
Abstract
Bacteria in corals have been studied in detail in the past decades. However, the biodiversity and bioactivity of fungi in corals are still poorly understood. This study investigated the biodiversity and antifouling activity of fungi in soft corals Cladiella krempfi and Sarcophyton tortuosum from the South China Sea. A high diverse and abundant fungal community was found in the two soft corals. Furthermore, five isolates shared 83-95% similarity with their closest relatives, indicating that they might be novel species in genera Phaeoshaeria and Mucor. In addition, approximately 50% of the representative isolates exhibited distinct antifouling activity. In particular, isolates Fungal sp. SCAU132 and Fungal sp. SCAU133 displayed very strong antifouling activity against Bugula neritina, suggesting they can provide a potential resource for further investigation on isolation of novel antifouling metabolites. To our knowledge, this study is the first report to investigate the biodiversity and antifouling activity of fungi in C. krempfi and S. tortuosum.
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Affiliation(s)
- Xiao-Yong Zhang
- Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bior-esource Conservation and Exploitation, College of Marine Sciences, South China Agricultural University, 510642, Guangzhou, China
| | - Hui-Li Hao
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, 510642, Guangzhou, China
| | - Stanley Chun Kwan Lau
- Department of Ocean Science, Hong Kong University of Science and Technology, Clearwater Bay, 999077, Kowloon, Hong Kong, China
| | - Huai-You Wang
- Division of Life Science and Center for Chinese Medicine, Hong Kong University of Science and Technology, Clearwater Bay, 999077, Kowloon, Hong Kong, China
| | - Yu Han
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, 510642, Guangzhou, China
| | - Li-Mei Dong
- College of Forestry and Landscape Architecture, South China Agricultural University, 510642, Guangzhou, China.
| | - Ri-Ming Huang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, 510642, Guangzhou, China.
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78
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Isolation, structure elucidation, and antibacterial evaluation of the metabolites produced by the marine-sourced Streptomyces sp. ZZ820. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.01.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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79
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Li L, Xu QH, Wang XT, Lin HW, Lu YH. Actinomadura craniellae sp. nov., isolated from a marine sponge in the South China Sea. Int J Syst Evol Microbiol 2019; 69:1207-1212. [PMID: 30777821 DOI: 10.1099/ijsem.0.003295] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel marine actinomycete, designated LHW63021T, was isolated from a marine sponge, genus Craniella, collected in the South China Sea. A polyphasic approach was applied to characterize the taxonomic position of this strain. The strain was found to have scarce aerial mycelia that differentiated into spore chains. The cell-wall hydrolysates contained meso-diaminopimelic acid as the diagnostic diamino acid. Glucose, galactose, mannose and madurose were found in the whole-cell hydrolysates. The dominant polar lipids were phosphatidylinositol and diphosphatidylglycerol. MK-9(H6) and MK-9(H8) were the predominant menaquinones. The major fatty acids were iso-C16 : 0, iso-C18 : 0, 10-methyl C17 : 0 and C18 : 1 ω9c. The DNA G+C content based on the draft genome sequence was 72.0 mol%. 16S rRNA gene sequence analysis indicated that strain LHW63021T was a member of the genus Actinomadura and had the highest similarity to Actinomadura echinospora DSM 43163T (97.3 %). Phylogenetic trees supported their close relationship. The average nucleotide identity and digital DNA-DNA hybridization values between the whole genome sequences of strain LHW63021T and A. echinospora DSM 43163T were 79.13 and 23.20 %, respectively. The evidence from the polyphasic study shows that strain LHW63021T represents a novel species of the genus Actinomadura, for which the name Actinomadura craniellae sp. nov. is proposed. The type strain is LHW63021T (=DSM 106125T=CCTCC AA 2018015T).
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Affiliation(s)
- Lei Li
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China.,Marine Drugs Research Center, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PR China
| | - Qi-Hang Xu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China.,Marine Drugs Research Center, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PR China
| | - Xiao-Tian Wang
- Shanghai Pinghe Bilingual School, Shanghai 201206, PR China
| | - Hou-Wen Lin
- Marine Drugs Research Center, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PR China
| | - Yan-Hua Lu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China
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80
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Zhou S, Xiao K, Huang D, Wu W, Xu Y, Xia W, Huang X. Complete genome sequence of Streptomyces spongiicola HNM0071T, a marine sponge-associated actinomycete producing staurosporine and echinomycin. Mar Genomics 2019. [DOI: 10.1016/j.margen.2018.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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81
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Tawfike A, Attia EZ, Desoukey SY, Hajjar D, Makki AA, Schupp PJ, Edrada-Ebel R, Abdelmohsen UR. New bioactive metabolites from the elicited marine sponge-derived bacterium Actinokineospora spheciospongiae sp. nov. AMB Express 2019; 9:12. [PMID: 30680548 PMCID: PMC6345950 DOI: 10.1186/s13568-018-0730-0] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 12/31/2018] [Indexed: 12/15/2022] Open
Abstract
Several approaches have been dedicated to activate the cryptic gene clusters in the genomes of actinomycetes for the targeted discovery of new fascinating biomedical lead structures. In the current study, N-acetylglucosamine was used to maximize the chemical diversity of sponge-derived actinomycete Actinokineospora spheciospongiae sp. nov. HR-ESI-MS was employed for dereplication study and orthogonal partial least square-discriminant analysis was applied to evaluate the HR-ESI-MS data of the different fractions. As a result, two new fridamycins H (1) and I (2), along with three known compounds actinosporin C (3), D (4), and G (5) were isolated from the solid culture of sponge-associated actinomycete Actinokineospora spheciospongiae sp. nov., elicited with N-acetylglucosamine. Characterization of the isolated compounds was pursued using mass spectrometry and NMR spectral data. Fridamycin H (1) exhibited significant growth inhibitory activity towards Trypanosoma brucei strain TC221. These results highlight the potential of elicitation in sponge-associated actinomycetes as an effective strategy for the discovery of new anti-infective natural products.
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82
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Liang L, Sproule A, Haltli B, Marchbank DH, Berrué F, Overy DP, McQuillan K, Lanteigne M, Duncan N, Correa H, Kerr RG. Discovery of a New Natural Product and a Deactivation of a Quorum Sensing System by Culturing a "Producer" Bacterium With a Heat-Killed "Inducer" Culture. Front Microbiol 2019; 9:3351. [PMID: 30705672 PMCID: PMC6344404 DOI: 10.3389/fmicb.2018.03351] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 12/31/2018] [Indexed: 11/28/2022] Open
Abstract
Herein we describe a modified bacterial culture methodology as a tool to discover new natural products via supplementing actinomycete fermentation media with autoclaved cultures of “inducer” microbes. Using seven actinomycetes and four inducer microbes, we detected 28 metabolites that were induced in UHPLC-HRESIMS-based analysis of bacterial fermentations. Metabolomic analysis indicated that each inducer elicited a unique response from the actinomycetes and that some chemical responses were specific to each inducer-producer combination. Among these 28 metabolites, hydrazidomycin D, a new hydrazide-containing natural product was isolated from the pair Streptomyces sp. RKBH-B178 and Mycobacterium smegmatis. This result validated the effectiveness of the strategy in discovering new natural products. From the same set of induced metabolites, an in-depth investigation of a fermentation of Streptomyces sp. RKBH-B178 and autoclaved Pseudomonas aeruginosa led to the discovery of a glucuronidated analog of the pseudomonas quinolone signal (PQS). We demonstrated that RKBH-B178 is able to biotransform the P. aeruginosa quorum sensing molecules, 2-heptyl-4-quinolone (HHQ), and PQS to form PQS-GlcA. Further, PQS-GlcA was shown to have poor binding affinity to PqsR, the innate receptor of HHQ and PQS.
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Affiliation(s)
- Libang Liang
- Department of Chemistry, University of Prince Edward Island, Charlottetown, PE, Canada
| | - Amanda Sproule
- Department of Chemistry, University of Prince Edward Island, Charlottetown, PE, Canada
| | - Brad Haltli
- Department of Chemistry, University of Prince Edward Island, Charlottetown, PE, Canada.,Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada.,Nautilus Biosciences Croda, Charlottetown, PE, Canada
| | - Douglas H Marchbank
- Department of Chemistry, University of Prince Edward Island, Charlottetown, PE, Canada.,Nautilus Biosciences Croda, Charlottetown, PE, Canada
| | - Fabrice Berrué
- Department of Chemistry, University of Prince Edward Island, Charlottetown, PE, Canada
| | - David P Overy
- Department of Chemistry, University of Prince Edward Island, Charlottetown, PE, Canada.,Department of Pathology and Microbiology, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada
| | | | - Martin Lanteigne
- Department of Chemistry, University of Prince Edward Island, Charlottetown, PE, Canada
| | - Noelle Duncan
- Nautilus Biosciences Croda, Charlottetown, PE, Canada
| | | | - Russell G Kerr
- Department of Chemistry, University of Prince Edward Island, Charlottetown, PE, Canada.,Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, Charlottetown, PE, Canada.,Nautilus Biosciences Croda, Charlottetown, PE, Canada
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83
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Kuo J, Yang YT, Lu MC, Wong TY, Sung PJ, Huang YS. Antimicrobial activity and diversity of bacteria associated with Taiwanese marine sponge Theonella swinhoei. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-018-1414-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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84
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Kos Kramar M, Tinta T, Lučić D, Malej A, Turk V. Bacteria associated with moon jellyfish during bloom and post-bloom periods in the Gulf of Trieste (northern Adriatic). PLoS One 2019; 14:e0198056. [PMID: 30645606 PMCID: PMC6333360 DOI: 10.1371/journal.pone.0198056] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 12/24/2018] [Indexed: 12/16/2022] Open
Abstract
Jellyfish are a prominent component of the plankton community. They frequently form conspicuous blooms which may interfere with different human enterprises. Among the aspects that remain understudied are jellyfish associations with microorganisms having potentially important implications for organic matter cycling. To the best of our knowledge, this study is the first to investigate the bacterial community associated with live moon jellyfish (Aurelia solida, Scyohozoa) in the Adriatic Sea. Using 16S rRNA clone libraries and culture-based methods, we have analyzed the bacterial community composition of different body parts: the exumbrella surface, oral arms, and gastric cavity, and investigated possible differences in medusa-associated bacterial community structure at the time of the jellyfish population peak, and during the senescent phase at the end of bloom. Microbiota associated with moon jellyfish was different from ambient seawater bacterial assemblage and varied between different body parts. Betaproteobacteria (Burkholderia, Cupriavidus and Achromobacter) dominated community in the gastral cavity of medusa, while Alphaproteobacteria (Phaeobacter, Ruegeria) and Gammaproteobacteria (Stenotrophomonas, Alteromonas, Pseudoalteromonas and Vibrio) prevailed on ‘outer’ body parts. Bacterial community structure changed during senescent phase, at the end of the jellyfish bloom, showing an increased abundance of Gammaproteobacteria, exclusively Vibrio. The results of cultured bacterial isolates showed the dominance of Gammaproeteobacteria, especially Vibrio and Pseudoalteromonas in all body parts. Our results suggest that jellyfish associated bacterial community might have an important role for the host, and that anthropogenic pollution in the Gulf of Trieste might affect their community structure.
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Affiliation(s)
- Maja Kos Kramar
- Marine Biology Station Piran, National Institute of Biology, Piran, Slovenia
| | - Tinkara Tinta
- Marine Biology Station Piran, National Institute of Biology, Piran, Slovenia
- Department of Limnology and Bio-Oceanography, Center of Functional Ecology, University of Vienna, Vienna, Austria
| | - Davor Lučić
- Institute for Marine and Coastal Research, University of Dubrovnik, Dubrovnik, Croatia
| | - Alenka Malej
- Marine Biology Station Piran, National Institute of Biology, Piran, Slovenia
| | - Valentina Turk
- Marine Biology Station Piran, National Institute of Biology, Piran, Slovenia
- * E-mail:
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85
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Shady NH, Fouad MA, Salah Kamel M, Schirmeister T, Abdelmohsen UR. Natural Product Repertoire of the Genus Amphimedon. Mar Drugs 2018; 17:md17010019. [PMID: 30598005 PMCID: PMC6357078 DOI: 10.3390/md17010019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 12/20/2018] [Accepted: 12/24/2018] [Indexed: 01/23/2023] Open
Abstract
Marine sponges are a very attractive and rich source in the production of novel bioactive compounds. The sponges exhibit a wide range of pharmacological activities. The genus Amphimedon consists of various species, such as viridis, compressa, complanata, and terpenensis, along with a handful of undescribed species. The Amphimedon genus is a rich source of secondary metabolites containing diverse chemical classes, including alkaloids, ceramides, cerebrososides, and terpenes, with various valuable biological activities. This review covers the literature from January 1983 until January 2018 and provides a complete survey of all the compounds isolated from the genus Amphimedon and the associated microbiota, along with their corresponding biological activities, whenever applicable.
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Affiliation(s)
- Nourhan Hisham Shady
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone, P.O. Box 61111 New Minia City, 61519 Minia, Egypt.
| | - Mostafa A Fouad
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, 61519 Minia, Egypt.
| | - Mohamed Salah Kamel
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone, P.O. Box 61111 New Minia City, 61519 Minia, Egypt.
| | - Tanja Schirmeister
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg University, Staudingerweg 5, 55128 Mainz, Germany.
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86
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El-Hawary SS, Sayed AM, Mohammed R, Khanfar MA, Rateb ME, Mohammed TA, Hajjar D, Hassan HM, Gulder TAM, Abdelmohsen UR. New Pim-1 Kinase Inhibitor From the Co-culture of Two Sponge-Associated Actinomycetes. Front Chem 2018; 6:538. [PMID: 30525020 PMCID: PMC6262321 DOI: 10.3389/fchem.2018.00538] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 10/16/2018] [Indexed: 11/14/2022] Open
Abstract
Saccharomonospora sp. UR22 and Dietzia sp. UR66, two actinomycetes derived from the Red Sea sponge Callyspongia siphonella, were co-cultured and the induced metabolites were monitored by HPLC-DAD and TLC. Saccharomonosporine A (1), a novel brominated oxo-indole alkaloid, convolutamydine F (2) along with other three known induced metabolites (3-5) were isolated from the EtOAc extract of Saccharomonospora sp. UR22 and Dietzia sp. UR66 co-culture. Additionally, axenic culture of Saccharomonospora sp. UR22 led to isolation of six known microbial metabolites (6-11). A kinase inhibition assay results showed that compounds 1 and 3 were potent Pim-1 kinase inhibitors with an IC50 value of 0.3 ± 0.02 and 0.95 ± 0.01 μM, respectively. Docking studies revealed the binding mode of compounds 1 and 3 in the ATP pocket of Pim-1 kinase. Testing of compounds 1 and 3 displayed significant antiproliferative activity against the human colon adenocarcinoma HT-29, (IC50 3.6 and 3.7 μM, respectively) and the human promyelocytic leukemia HL-60, (IC50 2.8 and 4.2 μM, respectively). These results suggested that compounds 1 and 3 act as potential Pim-1 kinase inhibitors that mediate the tumor cell growth inhibitory effect. This study highlighted the co-cultivation approach as an effective strategy to increase the chemical diversity of the secondary metabolites hidden in the genomes of the marine actinomycetes.
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Affiliation(s)
- Seham S El-Hawary
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Ahmed M Sayed
- Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt.,Pharmacognosy Department, Faculty of Pharmacy, Nahda University, Beni-Suef, Egypt
| | - Rabab Mohammed
- Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt
| | - Mohammad A Khanfar
- Faculty of Pharmacy, The University of Jordan, Amman, Jordan.,College of Pharmacy, Alfaisal University, Riyadh, Saudi Arabia
| | - Mostafa E Rateb
- Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt.,School of Computing, Engineering and Physical Sciences, University of the West of Scotland, Paisley, United Kingdom.,Marine Biodiscovery Centre, University of Aberdeen, Aberdeen, United Kingdom
| | - Tarek A Mohammed
- Marine Invertebrates, National Institute of Oceanography and Fisheries, Red Sea Branch, Hurghada, Egypt
| | - Dina Hajjar
- Department of Biochemistry, Faculty of Science, Center for Science and Medical Research, University of Jeddah, Jeddah, Saudi Arabia
| | - Hossam M Hassan
- Pharmacognosy Department, Faculty of Pharmacy, Beni-Suef University, Beni-Suef, Egypt.,Pharmacognosy Department, Faculty of Pharmacy, Nahda University, Beni-Suef, Egypt
| | - Tobias A M Gulder
- Department of Chemistry and Center for Integrated Protein Science Munich (CIPSM), Biosystems Chemistry, Technical University of Munich, Garching, Germany.,Chair of Technical Biochemistry, Technische Universität Dresden, Dresden, Germany
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87
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Li L, Wang J, Zhou YJ, Lin HW, Lu YH. Streptomyces reniochalinae sp. nov. and Streptomyces diacarni sp. nov., from marine sponges. Int J Syst Evol Microbiol 2018; 69:99-104. [PMID: 30427301 DOI: 10.1099/ijsem.0.003109] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Two marine actinomycete strains, LHW50302T and LHW51701T, were isolated from marine sponges collected in Sansha, Hainan Province, China. The morphological, chemotaxonomic and phylogenetic characteristics were consistent with their classification in the genus Streptomyces. The strains formed hooked and looped chains of arthrospores with smooth surfaces. The cell-wall hydrolysates of the strains contained ll-diaminopimelic acid as the diagnostic diamino acid. MK-9(H8) was the predominant menaquinone. The major polar lipids were diphosphatidylglycerol, phosphatidylethanolamine and phosphatidylinositol. Major fatty acids of the strains were iso-C16 : 0, anteiso-C15 : 0 and anteiso-C17 : 0. The 16S rRNA gene sequences indicated that the strains clustered together with Streptomyces albus CGMCC 4.1640T and Streptomyces qinglanensis CGMCC 4.6825T. Multilocus sequence analysis (MLSA) confirmed their relationship. Genome relatedness in forms of average nucleotide identity, digital DNA-DNA hybridization value and MLSA evolutionary distance between each of the strains and its closest relatives showed that they belonged to distinct species. On the basis of these results, strains LHW50302T and LHW51701T belong to two novel species in the genus Streptomyces, for which the names Streptomyces reniochalinae sp. nov. (type strain LHW50302T=CCTCC AA 2018013T=DSM 106194T) and Streptomyces diacarni sp. nov. (type strain LHW51701T=CCTCC AA 2018017T=DSM 106126T) are proposed, respectively.
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Affiliation(s)
- Lei Li
- 1State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China.,2Marine Drugs Research Center, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PR China
| | - Jie Wang
- 2Marine Drugs Research Center, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PR China
| | - Yong-Jun Zhou
- 2Marine Drugs Research Center, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PR China
| | - Hou-Wen Lin
- 2Marine Drugs Research Center, Department of Pharmacy, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PR China
| | - Yan-Hua Lu
- 1State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China
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88
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Zhang X, Shu C, Li Q, Lian XY, Zhang Z. Novel cyclohexene and benzamide derivatives from marine-associated Streptomyces sp. ZZ502. Nat Prod Res 2018; 33:2151-2159. [PMID: 30417673 DOI: 10.1080/14786419.2018.1489391] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Three new compounds and the known benzamides of 2-acetamido-3-hydroxybenzamide, 2-amino-3-hydroxybenzamide, and 2-aminobenzamide were isolated from the culture of a marine actinomycete Streptomyces sp. ZZ502. Structures of the new compounds were determined as 3-amino-2-carboxamine-6(R)-chloro-4(R),5(S)-dihydroxy-cyclohex-2-en-1-one, 3-amino-2-carboxamine-4(S),6(S)-dihydroxy-cyclohex-2-en-1-one, and 3-hydroxy-2-propionamidobenzamide based on extensive NMR spectroscopical analysis, HRESIMS data, ECD calculation, and X-ray diffraction analysis. None of these isolated compounds showed activity in inhibiting the proliferation of glioma cells nor the growth of methicillin-resistant Staphylococcus aureus, Escherichia coli, and Candida albicans.
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Affiliation(s)
- Xiufang Zhang
- a College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Chenyan Shu
- b Ocean College, Zhejiang University , Zhoushan Campus , Zhoushan , China
| | - Qiao Li
- a College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
| | - Xiao-Yuan Lian
- b Ocean College, Zhejiang University , Zhoushan Campus , Zhoushan , China
| | - Zhizhen Zhang
- a College of Pharmaceutical Sciences , Zhejiang University , Hangzhou , China
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89
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Elsayed Y, Refaat J, Abdelmohsen UR, Othman EM, Stopper H, Fouad MA. Metabolomic profiling and biological investigation of the marine sponge-derived bacterium Rhodococcus sp. UA13. PHYTOCHEMICAL ANALYSIS : PCA 2018; 29:543-548. [PMID: 29672972 DOI: 10.1002/pca.2765] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 02/17/2018] [Accepted: 02/17/2018] [Indexed: 06/08/2023]
Abstract
INTRODUCTION Marine sponge-associated actinomycetes are potent sources of bioactive natural products of pharmaceutical significance. They also contributed to the discovery of several clinically relevant antimicrobials. OBJECTIVE To apply the non-targeted metabolomics approach in chemical profiling of the sponge-derived bacterium Rhodococcus sp. UA13, formerly recovered from the Red Sea sponge Callyspongia aff. Implexa, along with testing for the anti-infective potential of its different fractions. METHODOLOGY Metabolomic analysis of the crude extract was carried out using liquid chromatography with high resolution electrospray ionisation mass spectrometry (LC-HR-ESI-MS) for dereplication purposes. Besides, the three major fractions (ethyl acetate, methanol, and n-butanol) obtained by chromatographic fractionation of the crude extract were evaluated for their anti-infective properties. RESULTS A variety of metabolites, mostly peptides, were characterised herein for the first time from the genus Rhodococcus. Among the tested samples, the n-butanol fraction showed potent inhibitory activities against Staphylococcus aureus, Candida albicans, and Trypanosoma brucei brucei with IC50 values of 9.3, 6.7, and 8.7 μg/mL, respectively, whereas only the ethyl acetate fraction was active against Chlamydia trachomatis (IC50 = 18.9 μg/mL). In contrast, both fractions did not exert anti-infective actions against Enterococcus faecalis and Leishmania major, whereas the methanol fraction was totally inactive against all the tested organisms. CONCLUSION This study showed the helpfulness of the established procedure in metabolic profiling of marine actinomycetes using liquid chromatography mass spectrometry (LC-MS) data, which aids in reducing the complex isolation steps during their chemical characterisation. The anti-infective spectrum of their metabolites is also interestingly relevant to future drug development.
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Affiliation(s)
- Yasmin Elsayed
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - John Refaat
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt
- Department of Botany II, Julius-von-Sachs Institute for Biological Sciences, University of Würzburg, Würzburg, Germany
| | - Eman Maher Othman
- Department of Analytical Chemistry, Faculty of Pharmacy, Minia University, Minia, Egypt
- Department of Toxicology, University of Würzburg, Würzburg, Germany
| | - Helga Stopper
- Department of Toxicology, University of Würzburg, Würzburg, Germany
| | - Mostafa Ahmed Fouad
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt
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90
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Chen L, Hu JS, Xu JL, Shao CL, Wang GY. Biological and Chemical Diversity of Ascidian-Associated Microorganisms. Mar Drugs 2018; 16:md16100362. [PMID: 30275404 PMCID: PMC6212887 DOI: 10.3390/md16100362] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 09/23/2018] [Accepted: 09/27/2018] [Indexed: 11/16/2022] Open
Abstract
Ascidians are a class of sessile filter-feeding invertebrates, that provide unique and fertile niches harboring various microorganisms, such as bacteria, actinobacteria, cyanobacteria and fungi. Over 1000 natural products, including alkaloids, cyclic peptides, and polyketides, have been isolated from them, which display diverse properties, such as antibacterial, antifungal, antitumor, and anti-inflammatory activities. Strikingly, direct evidence has confirmed that ~8% of natural products from ascidians are actually produced by symbiotic microorganisms. In this review, we present 150 natural products from microorganisms associated with ascidians that have been reported up to 2017.
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Affiliation(s)
- Lei Chen
- Department of Bioengineering, School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China.
| | - Jin-Shuang Hu
- Department of Bioengineering, School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China.
| | - Jia-Lei Xu
- Department of Bioengineering, School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China.
| | - Chang-Lun Shao
- Laboratory of Marine Drugs, The Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
| | - Guang-Yu Wang
- Department of Bioengineering, School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China.
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91
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Zhang D, Shu C, Lian X, Zhang Z. New Antibacterial Bagremycins F and G from the Marine-Derived Streptomyces sp. ZZ745. Mar Drugs 2018; 16:md16090330. [PMID: 30213054 PMCID: PMC6163353 DOI: 10.3390/md16090330] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2018] [Revised: 08/30/2018] [Accepted: 09/10/2018] [Indexed: 12/27/2022] Open
Abstract
As part of our research to discover novel bioactive natural products from marine microorganisms, five bagremycin analogues, including the previously unreported bagremycins F (1) and G (2), were isolated from a marine actinomycete Streptomyces sp. ZZ745. The structures of these compounds were determined by means of NMR spectroscopic analysis, HRESIMS data, and optical rotation. Both bagremycins F (1) and G (2) showed antibacterial activity against Escherichia coli, with MIC values of 41.8 and 61.7 μM, respectively.
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Affiliation(s)
- Di Zhang
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China.
| | - Chenyan Shu
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Xiaoyuan Lian
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Zhizhen Zhang
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China.
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92
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Balasubramanian S, Skaf J, Holzgrabe U, Bharti R, Förstner KU, Ziebuhr W, Humeida UH, Abdelmohsen UR, Oelschlaeger TA. A New Bioactive Compound From the Marine Sponge-Derived Streptomyces sp. SBT348 Inhibits Staphylococcal Growth and Biofilm Formation. Front Microbiol 2018; 9:1473. [PMID: 30050506 PMCID: PMC6050364 DOI: 10.3389/fmicb.2018.01473] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 06/13/2018] [Indexed: 01/09/2023] Open
Abstract
Staphylococcus epidermidis, the common inhabitant of human skin and mucosal surfaces has emerged as an important pathogen in patients carrying surgical implants and medical devices. Entering the body via surgical sites and colonizing the medical devices through formation of multi-layered biofilms leads to refractory and persistent device-related infections (DRIs). Staphylococci organized in biofilms are more tolerant to antibiotics and immune responses, and thus are difficult-to-treat. The consequent morbidity and mortality, and economic losses in health care systems has strongly necessitated the need for development of new anti-bacterial and anti-biofilm-based therapeutics. In this study, we describe the biological activity of a marine sponge-derived Streptomyces sp. SBT348 extract in restraining staphylococcal growth and biofilm formation on polystyrene, glass, medically relevant titan metal, and silicone surfaces. A bioassay-guided fractionation was performed to isolate the active compound (SKC3) from the crude SBT348 extract. Our results demonstrated that SKC3 effectively inhibits the growth (MIC: 31.25 μg/ml) and biofilm formation (sub-MIC range: 1.95–<31.25 μg/ml) of S. epidermidis RP62A in vitro. Chemical characterization of SKC3 by heat and enzyme treatments, and mass spectrometry (HRMS) revealed its heat-stable and non-proteinaceous nature, and high molecular weight (1258.3 Da). Cytotoxicity profiling of SKC3 in vitro on mouse fibroblast (NIH/3T3) and macrophage (J774.1) cell lines, and in vivo on the greater wax moth larvae Galleria mellonella revealed its non-toxic nature at the effective dose. Transcriptome analysis of SKC3 treated S. epidermidis RP62A has further unmasked its negative effect on central metabolism such as carbon flux as well as, amino acid, lipid, and energy metabolism. Taken together, these findings suggest a potential of SKC3 as a putative drug to prevent staphylococcal DRIs.
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Affiliation(s)
| | - Joseph Skaf
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Würzburg, Germany
| | - Ulrike Holzgrabe
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Würzburg, Germany
| | - Richa Bharti
- Core Unit Systems Medicine, University of Würzburg, Würzburg, Germany
| | - Konrad U Förstner
- Core Unit Systems Medicine, University of Würzburg, Würzburg, Germany
| | - Wilma Ziebuhr
- Institute for Molecular Infection Biology, University of Würzburg, Würzburg, Germany
| | - Ute H Humeida
- GEOMAR Helmholtz Centre for Ocean Research, RD3 Marine Microbiology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Usama R Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, Minia, Egypt
| | - Tobias A Oelschlaeger
- Institute for Molecular Infection Biology, University of Würzburg, Würzburg, Germany
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93
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Sun W, Liu C, Zhang F, Zhao M, Li Z. Comparative Genomics Provides Insights Into the Marine Adaptation in Sponge-Derived Kocuriaflava S43. Front Microbiol 2018; 9:1257. [PMID: 29937765 PMCID: PMC6002675 DOI: 10.3389/fmicb.2018.01257] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 05/24/2018] [Indexed: 11/13/2022] Open
Abstract
Sponge-derived actinomycetes represent a significant component of marine actinomycetes. Members of the genus Kocuria are distributed in various habitats such as soil, rhizosphere, clinical specimens, marine sediments, and sponges, however, to date, little is known about the mechanism of their environmental adaptation. Kocuria flava S43 was isolated from a coastal sponge. Phylogenetic analysis revealed that it was closely related to the terrestrial airborne K. flava HO-9041. In this study, to gain insights into the marine adaptation in K. flava S43 we sequenced the draft genome for K. flava S43 by third generation sequencing (TGS) and compared it with those of K. flava HO-9041 and some other Kocuria relatives. Comparative genomics and phylogenetic analyses revealed that K. flava S43 might adapt to the marine environment mainly by increasing the number of the genes linked to potassium homeostasis, resistance to heavy metals and phosphate metabolism, and acquiring the genes associated with electron transport and the genes encoding ATP-binding cassette (ABC) transporter, aquaporin, and thiol/disulfide interchange protein. Notably, gene acquisition was probably a primary mechanism of environmental adaptation in K. flava S43. Furthermore, this study also indicated that the Kocuria isolates from various marine and hyperosmotic environments possessed common genetic basis for environmental adaptation.
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Affiliation(s)
- Wei Sun
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Changrong Liu
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Fengli Zhang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Mingzhu Zhao
- Instrumental Analysis Center, Shanghai Jiao Tong University, Shanghai, China
| | - Zhiyong Li
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
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94
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Barra L, Barac P, König GM, Crüsemann M, Dickschat JS. Volatiles from the fungal microbiome of the marine sponge Callyspongia cf. flammea. Org Biomol Chem 2018; 15:7411-7421. [PMID: 28872169 DOI: 10.1039/c7ob01837a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The volatiles emitted by five fungal strains previously isolated from the marine sponge Callyspongia cf. flammea were captured with a closed-loop stripping apparatus (CLSA) and analyzed by GC-MS. Besides several widespread compounds, a series of metabolites with interesting bioactivities were found, including the quorum sensing inhibitor protoanemonin, the fungal phytotoxin 3,4-dimethylpentan-4-olide, and the insect attractant 1,2,4-trimethoxybenzene. In addition, the aromatic polyketides isotorquatone and chartabomone that are both known from Eucalyptus and a new O-desmethyl derivative were identified. The biosynthesis of isotorquatone was studied by feeding experiments with isotopically labeled precursors and its absolute configuration was determined by enantioselective synthesis of a reference compound. Bioactivity testings showed algicidal activity for some of the identified compounds, suggesting a potential ecological function in sponge defence.
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Affiliation(s)
- Lena Barra
- Kekulé-Institute for Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Straße 1, D-53121 Bonn, Germany.
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95
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Guo ZK, Wang R, Chen SQ, Chen FX, Liu TM, Yang MQ. Anthocidins A⁻D, New 5-Hydroxyanthranilic Acid Related Metabolites from the Sea Urchin-Associated Actinobacterium, Streptomyces sp. HDa1. Molecules 2018; 23:molecules23051032. [PMID: 29702622 PMCID: PMC6102551 DOI: 10.3390/molecules23051032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 04/24/2018] [Accepted: 04/25/2018] [Indexed: 11/16/2022] Open
Abstract
Four new 5-hydroxyanthranilic acid related compounds, named anthocidins A⁻D (1⁻4), two known analogues n-lauryl 5-hydroxyanthranilate (5) and isolauryl 5-hydroxyanthranilate (6), together with benzamide (7), 3-hydroxy-4-methoxycinnamamide (8), and (3S-cis)-hexahydro-3-[(3,4-dihydroxyphenyl)methyl]pyrrolo[1,2-a]pyrazine-1,4-dione (9), were isolated from the fermentation broth of the marine-derived actinomycete, Streptomyces sp. HDa1, which was isolated from the gut of a sea urchin, Anthocidaris crassispina, collected from Hainan Island, China. The structures of these secondary metabolites were elucidated on the basis of their 1D and 2D-NMR and mass spectroscopic data, and anthocidin A was confirmed by single-crystal X-ray diffraction with Cu Kα radiation. Anthocidins A⁻D (1⁻4) feature an acetyl group substitution at the amino group and varying alkyl side chains at the carboxyl group of 5-hydroxyanthranilic acid, and compound 5 was isolated as a natural product for the first time. The cytotoxic and antibacterial activity of compounds 1⁻9 were evaluated.
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Affiliation(s)
- Zhi-Kai Guo
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
- Correspondence: ; Tel.: +86-898-6689-2946
| | - Rong Wang
- Hainan Academy of Ocean and Fisheries Sciences, Haikou 570203, China; helen1982--@163.com (R.W.); (S.-Q.C.); (F.-X.C.); (M.-Q.Y.)
| | - Shi-Quan Chen
- Hainan Academy of Ocean and Fisheries Sciences, Haikou 570203, China; helen1982--@163.com (R.W.); (S.-Q.C.); (F.-X.C.); (M.-Q.Y.)
| | - Fu-Xiao Chen
- Hainan Academy of Ocean and Fisheries Sciences, Haikou 570203, China; helen1982--@163.com (R.W.); (S.-Q.C.); (F.-X.C.); (M.-Q.Y.)
| | - Tian-Mi Liu
- Hainan Testing Center for the Quality and Safety of Aquatic Products, Haikou 570206, China;
| | - Ming-Qiu Yang
- Hainan Academy of Ocean and Fisheries Sciences, Haikou 570203, China; helen1982--@163.com (R.W.); (S.-Q.C.); (F.-X.C.); (M.-Q.Y.)
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96
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Singh J, Shah R, Singh D, Jaggi AS, Singh N. Design, synthesis, and biological evaluation of 2-substituted-2,3,4,9-tetrahydrospiro-β-carboline-3-carboxylic acid derivatives as first-in-class mast cell stabilizers. Arch Pharm (Weinheim) 2018; 351:e1800019. [PMID: 29644714 DOI: 10.1002/ardp.201800019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 03/19/2018] [Accepted: 03/19/2018] [Indexed: 11/08/2022]
Abstract
Mast cell degranulation plays a momentous role in myriad diseases like asthma, eczema, allergic rhinitis, and conjunctivitis as well as anaphylactic shock; hence, there is an unmet need for developing new mast cells stabilizers. The reported mast cell stabilizers have a heterocyclic moiety and an acidic group. Furthermore, the role of tryptophan in suppression of mast cell activation is established. Hence, we prepared constrained analogs of tryptophan, which are derivatives of 2,3,4,9-tetrahydrospiro-β-carboline-3-carboxylic acid, and evaluated them for ex vivo inhibition of compound 48/80-induced mast degranulation activity. By comparing IC50 (μM) values with that of the standard drug sodium cromoglycate (IC50 = 0.489 ± 0.003 μM), compounds with bulky groups like heptyl (compound 9; IC50 = 0.389 ± 0.015 μM) and octyl (compound 10; IC50 = 0.354 ± 0.023 μM) were found to be of similar potency as sodium cromoglycate. Furthermore, the polar group-containing compounds like the chloropropyl (compound 16; IC50 = 0.382 ± 0.083 μM) and benzoyl derivative (compound 14; IC50 = 00.469 ± 0.032 μM) were also found to be of similar potency as sodium cromoglycate. This is a seminal study of spiro-β-carboline mast cell stabilization having a wider scope in mast cell research; yet, the mechanism of action remains elusive.
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Affiliation(s)
- Jatinder Singh
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
| | - Ramanpreet Shah
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
| | - Dhandeep Singh
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
| | - Amteshwar S Jaggi
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
| | - Nirmal Singh
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, India
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97
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98
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Wang ZX, Qin S, Xu LH, Chen HP, Sun H, Huang R, Li ZH, Feng T, Liu JK. Xylanilyticolides A-C, Three New Compounds from Cultures of the Actinomycete Promicromonospora xylanilytica YIM 61515. NATURAL PRODUCTS AND BIOPROSPECTING 2018; 8:91-95. [PMID: 29441465 PMCID: PMC5913047 DOI: 10.1007/s13659-018-0154-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 01/19/2018] [Indexed: 05/21/2023]
Abstract
Three new lactones, xylanilyticolides A-C (1-3), were isolated from cultures of the actinomycete Promicromonospora xylanilytica YIM 61515. Their structures were elucidated by 1D and 2D NMR spectroscopic data in conjunction with HRESIMS analysis. Compound 1 exhibited potent cytotoxicities against five human cancer cell lines HL-60, A-549, SMMC-7721, MCF-7 and SW480 with the IC50 values of 3.9, 15.2, 11.2, 5.9, and 4.7 μM, respectively.
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Affiliation(s)
- Zhen-Xiong Wang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, China
| | - Shen Qin
- Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, China
| | - Li-Hua Xu
- Yunnan Institute of Microbiology, Yunnan University, Kunming, 650091, China
| | - He-Ping Chen
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, China
| | - Huan Sun
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, China
| | - Rong Huang
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, China
| | - Zheng-Hui Li
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, China
| | - Tao Feng
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, China.
| | - Ji-Kai Liu
- School of Pharmaceutical Sciences, South-Central University for Nationalities, Wuhan, 430074, China.
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99
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Selective isolation and characterisation of novel members of the family Nocardiopsaceae and other actinobacteria from a marine sediment of Tioman Island. Antonie van Leeuwenhoek 2018; 111:727-742. [DOI: 10.1007/s10482-018-1042-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 02/06/2018] [Indexed: 11/26/2022]
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100
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Steinert G, Gutleben J, Atikana A, Wijffels RH, Smidt H, Sipkema D. Coexistence of poribacterial phylotypes among geographically widespread and phylogenetically divergent sponge hosts. ENVIRONMENTAL MICROBIOLOGY REPORTS 2018; 10:80-91. [PMID: 29194987 DOI: 10.1111/1758-2229.12609] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 11/24/2017] [Indexed: 06/07/2023]
Abstract
Marine sponges are benthic 'filter-feeding' invertebrates that can host dense and diverse bacterial, archaeal and eukaryotic communities. Due to the finding of several genes encoding symbiosis factors, such as adhesins, ankyrin repeats and tetratricopeptide repeats, the candidate phylum 'Poribacteria' is considered as a promising model microorganism for studying the origin of host-symbiont interactions in sponges. However, relatively little is known about its global diversity and phylogenetic distribution among different sponge hosts. Therefore, in this study we investigated phylogenetic relationships among poribacterial phylotypes and generated a phylogenetic network to examine the distribution and intraspecific diversity of the phylotypes between phylogenetically divergent host-sponges at a global scale. For this study 361 poribacterial 16S rRNA gene sequences obtained by Sanger sequencing from 15 different countries and 8 marine regions were gathered. We could demonstrate that the candidate phylum 'Poribacteria' is composed of diverse phylotypes, which are distributed among a wide range of phylogenetically divergent sponge hosts. The current phylogenetic analyses found neither conclusive evidence for co-speciation with its hosts, nor biogeographical correlation. Moreover, we identified a novel poribacterial clade, which might represent a link between the previously established four 'Poribacteria' clades.
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Affiliation(s)
- Georg Steinert
- Laboratory of Microbiology, Wageningen University, Stippeneng 4, Wageningen, 6708 WE, The Netherlands
- Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University Oldenburg, Wilhelmshaven, 26382, Germany
| | - Johanna Gutleben
- Laboratory of Microbiology, Wageningen University, Stippeneng 4, Wageningen, 6708 WE, The Netherlands
| | - Akhirta Atikana
- Laboratory of Microbiology, Wageningen University, Stippeneng 4, Wageningen, 6708 WE, The Netherlands
- Research Center for Biotechnology, Indonesian Institute of Sciences (LIPI), Cibinong Science Center (CSC) Cibinong, Bogor, 16911, Indonesia
| | - Rene H Wijffels
- Bioprocess Engineering, AlgaePARC, Wageningen University, Wageningen, 6700 AA, The Netherlands
- Faculty of Biosciences and Aquaculture, Nord University, Bodø, 8026, Norway
| | - Hauke Smidt
- Laboratory of Microbiology, Wageningen University, Stippeneng 4, Wageningen, 6708 WE, The Netherlands
| | - Detmer Sipkema
- Laboratory of Microbiology, Wageningen University, Stippeneng 4, Wageningen, 6708 WE, The Netherlands
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