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Duan Y, Chen J, Pang Z, Ye X, Zhang C, Hu H, Xie J. Antifungal mechanism of Streptomyces ma. FS-4 on fusarium wilt of banana. J Appl Microbiol 2020; 130:196-207. [PMID: 32654413 DOI: 10.1111/jam.14784] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2020] [Revised: 06/15/2020] [Accepted: 07/03/2020] [Indexed: 12/24/2022]
Abstract
AIM Research on prevention and cure of banana wilt is important to ensure the healthy development of the banana industry. In this study, antifungal mechanism of Streptomyces ma. FS-4 on fusarium wilt of banana was investigated. METHODS AND RESULTS The physiological strain of banana fusarium pathogen Fusarium oxysporum f. sp. cubense Race 4 (FOC.4) was used as the target fungus, and the antifungal mechanism of the crude extract of Streptomyces ma. FS-4 was investigated. Eighteen different compounds identified by gas chromatography-mass spectrometry were composed of aldehydes, methyl, hydrocarbons, amides, esters and acids. FS-4 significantly inhibited the spore germination of the target fungi, with an EC50 of 22·78 μg ml-1 . After treatment with 100 μg ml-1 FS-4 crude extract, the N-acetylglucosamine content in the mycelium increased 1·95-fold. However, the extract had no significant effect on β-1,3-glucanase. At the FS-4 crude extract dose of 100 μg ml-1 , the total sugar and protein contents decreased by 28·6 and 29·1% respectively, and the fat content was 41·3%. FS-4 significantly inhibited the activity of the mitochondrial complex III of Foc4, which was reduced by 52·45%. Moreover FS-4 reduced the activity of succinate dehydrogenase, a key enzyme in the Krebs cycle, by 60·2%. However, FS-4 had no significant effect on malate dehydrogenase. The membrane potential on the mitochondrial inner membrane was significantly reduced at the test concentration of 100 μg ml-1 . ROS gradually accumulated in the Foc4 hypha, and the burst was 3·97 times higher than the control. CONCLUSIONS This study demonstrated that the antifungal mechanism of Streptomyces ma. FS-4 against Foc4 includes the destruction of the plasma membrane and mitochondrial dysfunction and finally induction of cell apoptosis. SIGNIFICANCE AND IMPACT OF THE STUDY These results may indicate the prevention and control of banana wilt, which is of great significance to the healthy development of banana industry system.
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Affiliation(s)
- Y Duan
- Key Laboratory of Tropical Fruit Biology, Ministry of Agriculture, South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Science, Zhanjiang, China
| | - J Chen
- College of Food Science and Technology, Hainan University, Haikou, China
| | - Z Pang
- Key Laboratory of Tropical Fruit Biology, Ministry of Agriculture, South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Science, Zhanjiang, China
| | - X Ye
- College of Food Science and Technology, Hainan University, Haikou, China
| | - C Zhang
- College of Food Science and Technology, Hainan University, Haikou, China
| | - H Hu
- Key Laboratory of Tropical Fruit Biology, Ministry of Agriculture, South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Science, Zhanjiang, China
| | - J Xie
- Key Laboratory of Tropical Fruit Biology, Ministry of Agriculture, South Subtropical Crop Research Institute, Chinese Academy of Tropical Agricultural Science, Zhanjiang, China
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Hamid ME, Reitz T, Joseph MRP, Hommel K, Mahgoub A, Elhassan MM, Buscot F, Tarkka M. Diversity and geographic distribution of soil streptomycetes with antagonistic potential against actinomycetoma-causing Streptomyces sudanensis in Sudan and South Sudan. BMC Microbiol 2020; 20:33. [PMID: 32050891 PMCID: PMC7017484 DOI: 10.1186/s12866-020-1717-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Accepted: 01/30/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Production of antibiotics to inhibit competitors affects soil microbial community composition and contributes to disease suppression. In this work, we characterized whether Streptomyces bacteria, prolific antibiotics producers, inhibit a soil borne human pathogenic microorganism, Streptomyces sudanensis. S. sudanensis represents the major causal agent of actinomycetoma - a largely under-studied and dreadful subcutaneous disease of humans in the tropics and subtropics. The objective of this study was to evaluate the in vitro S. sudanensis inhibitory potential of soil streptomycetes isolated from different sites in Sudan, including areas with frequent (mycetoma belt) and rare actinomycetoma cases of illness. RESULTS Using selective media, 173 Streptomyces isolates were recovered from 17 sites representing three ecoregions and different vegetation and ecological subdivisions in Sudan. In total, 115 strains of the 173 (66.5%) displayed antagonism against S. sudanensis with different levels of inhibition. Strains isolated from the South Saharan steppe and woodlands ecoregion (Northern Sudan) exhibited higher inhibitory potential than those strains isolated from the East Sudanian savanna ecoregion located in the south and southeastern Sudan, or the strains isolated from the Sahelian Acacia savanna ecoregion located in central and western Sudan. According to 16S rRNA gene sequence analysis, isolates were predominantly related to Streptomyces werraensis, S. enissocaesilis, S. griseostramineus and S. prasinosporus. Three clusters of isolates were related to strains that have previously been isolated from human and animal actinomycetoma cases: SD524 (Streptomyces sp. subclade 6), SD528 (Streptomyces griseostramineus) and SD552 (Streptomyces werraensis). CONCLUSION The in vitro inhibitory potential against S. sudanensis was proven for more than half of the soil streptomycetes isolates in this study and this potential may contribute to suppressing the abundance and virulence of S. sudanensis. The streptomycetes isolated from the mycetoma free South Saharan steppe ecoregion show the highest average inhibitory potential. Further analyses suggest that mainly soil properties and rainfall modulate the structure and function of Streptomyces species, including their antagonistic activity against S. sudanensis.
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Affiliation(s)
- Mohamed E Hamid
- Department of Soil Ecology, Helmholtz-Centre for Environmental Research GmbH - UFZ, Theodor-Lieser-Str. 4, 06120, Halle, Germany
- Department of Clinical Microbiology and Parasitology/ College of Medicine, King Khalid University, PO Box 641, Abha, 61314, Saudi Arabia
- Department of Preventive Medicine, Faculty of Veterinary Science, University of Khartoum, Khartoum, Sudan
| | - Thomas Reitz
- Department of Soil Ecology, Helmholtz-Centre for Environmental Research GmbH - UFZ, Theodor-Lieser-Str. 4, 06120, Halle, Germany
- German Centre of Integrative Biodiversity Research (iDiv), Halle - Jena - Leipzig, Germany
| | - Martin R P Joseph
- Department of Clinical Microbiology and Parasitology/ College of Medicine, King Khalid University, PO Box 641, Abha, 61314, Saudi Arabia
| | - Kerstin Hommel
- Department of Soil Ecology, Helmholtz-Centre for Environmental Research GmbH - UFZ, Theodor-Lieser-Str. 4, 06120, Halle, Germany
| | - Adil Mahgoub
- Department of Preventive Medicine, Faculty of Veterinary Science, University of Khartoum, Khartoum, Sudan
| | - Mogahid M Elhassan
- Department of Clinical Laboratory Science, College of Applied Medical Science, Taibah University, Medina, Saudi Arabia
| | - François Buscot
- Department of Soil Ecology, Helmholtz-Centre for Environmental Research GmbH - UFZ, Theodor-Lieser-Str. 4, 06120, Halle, Germany
- German Centre of Integrative Biodiversity Research (iDiv), Halle - Jena - Leipzig, Germany
| | - Mika Tarkka
- Department of Soil Ecology, Helmholtz-Centre for Environmental Research GmbH - UFZ, Theodor-Lieser-Str. 4, 06120, Halle, Germany.
- German Centre of Integrative Biodiversity Research (iDiv), Halle - Jena - Leipzig, Germany.
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Camacho-Ruiz MA, Ordaz E, Kirchmayr MR, Esquivel-Solís H, Asaff-Torres A, Mateos-Díaz JC, Carriѐre F, Rodríguez JA. Screening of Gastrointestinal Lipase Inhibitors Produced by Microorganisms Isolated from Soil and Lake Sediments. Int Microbiol 2020; 23:335-43. [PMID: 31823203 DOI: 10.1007/s10123-019-00107-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 10/25/2019] [Accepted: 11/21/2019] [Indexed: 10/25/2022]
Abstract
Gastrointestinal lipase inhibitors are molecules of pharmaceutical interest due to their use as anti-obesity drugs. In this study, forty strains isolated from soil and sediments were identified with the ability to produce inhibition of gastrointestinal lipase activity. The biomass extract of these strains showed at least 50% inhibition in the hydrolysis of tributyrin by recombinant human pancreatic lipase (rHPL) or rabbit gastric lipase (RGL) by in vitro assays. Based on gene sequencing, the isolates were identified mainly as Streptomycetes. Moreover, none of the identified strains has been reported to be lipase inhibitor producers, so they can be viewed as potential sources for obtaining new drugs. IC50 values of the three best inhibitor extracts showed that AC104-10 was the most promising strain for production of gastrointestinal lipase inhibitors. AC104-10 shows 99% homology (16S rRNA gene fragment) to Streptomyces cinereoruber strain NBRC 12756. An inhibitory study over trypsin activity revealed that AC104-10 extract, as well as THL, had no significant effect on the activity of this protease, showing its specificity for lipases. In addition, analyzes by MALDI-TOF mass spectrometry of the enzyme-inhibitor complex revealed that there is a covalent interaction of the AC104-10 inhibitor with the catalytic serine of the pancreatic lipase, and that the molecular weight of the inhibitor is approximately 686.19 Da.
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Sachs CC, Koepff J, Wiechert W, Grünberger A, Nöh K. mycelyso - high-throughput analysis of Streptomyces mycelium live cell imaging data. BMC Bioinformatics 2019; 20:452. [PMID: 31484491 PMCID: PMC6727546 DOI: 10.1186/s12859-019-3004-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Accepted: 06/13/2019] [Indexed: 11/19/2022] Open
Abstract
Background Streptomycetes are filamentous microorganisms of high biotechnological relevance, especially for the production of antibiotics. In submerged cultures, the productivity of these microorganisms is closely linked to their growth morphology. Microfluidic lab-on-a-chip cultivation systems, coupled with automated time-lapse imaging, generate spatio-temporal insights into the mycelium development of streptomycetes, therewith extending the biotechnological toolset by spatio-temporal screening under well-controlled and reproducible conditions. However, the analysis of the complex mycelial structure formation is limited by the extent of manual interventions required during processing of the acquired high-volume image data. These interventions typically lead to high evaluation times and, therewith, limit the analytic throughput and exploitation of microfluidic-based screenings. Results We present the tool mycelyso (MYCElium anaLYsis SOftware), an image analysis system tailored to fully automated hyphae-level processing of image stacks generated by time-lapse microscopy. With mycelyso, the developing hyphal streptomycete network is automatically segmented and tracked over the cultivation period. Versatile key growth parameters such as mycelium network structure, its development over time, and tip growth rates are extracted. Results are presented in the web-based exploration tool mycelyso Inspector, allowing for user friendly quality control and downstream evaluation of the extracted information. In addition, 2D and 3D visualizations show temporal tracking for detailed inspection of morphological growth behaviors. For ease of getting started with mycelyso, bundled Windows packages as well as Docker images along with tutorial videos are available. Conclusion mycelyso is a well-documented, platform-independent open source toolkit for the automated end-to-end analysis of Streptomyces image stacks. The batch-analysis mode facilitates the rapid and reproducible processing of large microfluidic screenings, and easy extraction of morphological parameters. The objective evaluation of image stacks is possible by reproducible evaluation workflows, useful to unravel correlations between morphological, molecular and process parameters at the hyphae- and mycelium-levels with statistical power. Electronic supplementary material The online version of this article (10.1186/s12859-019-3004-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Christian Carsten Sachs
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Str., Jülich, 52425, Germany
| | - Joachim Koepff
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Str., Jülich, 52425, Germany
| | - Wolfgang Wiechert
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Str., Jülich, 52425, Germany.,Computational Systems Biotechnology (AVT.CSB), RWTH Aachen University, Aachen, 52074, Germany
| | - Alexander Grünberger
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Str., Jülich, 52425, Germany.,Multiscale Bioengineering, Bielefeld University, Universitätsstr. 25, Bielefeld, 33615, Germany
| | - Katharina Nöh
- Institute of Bio- and Geosciences, IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, Wilhelm-Johnen-Str., Jülich, 52425, Germany.
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Mondal S, Rai VR. Molecular profiling of endophytic Streptomyces cavourensis MH16 inhabiting Millingtonia hortensis Linn. and influence of different culture media on biosynthesis of antimicrobial metabolites. Naturwissenschaften 2019; 106:51. [PMID: 31455975 DOI: 10.1007/s00114-019-1646-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 08/15/2019] [Accepted: 08/17/2019] [Indexed: 12/22/2022]
Abstract
Endophytic actinomycetes, a prolific source of natural products, are well known for their diverse metabolic versatility, and their association with medicinal plants and antimicrobial potential are well worth exploring. We isolated and identified the Streptomyces cavourensis strain MH16 inhabiting the tree Millingtonia hortensis Linn. using phylogenetic analysis based on a 16S rRNA molecular approach. We used the disc diffusion method to evaluate the impact of differences in the compositions of the media on the production of secondary metabolites from strain MH16. The production of antimicrobial metabolites was determined by the observation of inhibition zones on intensive bands when using a TLC-bioautography assay. Biosynthesis of secondary metabolites was optimal when the strain MH16 was cultured in ISP-2 medium as depicted by a zone of inhibition. Strain MH16 effectively inhibited methicillin-resistant Staphylococcus aureus, Escherichia coli, Candida albicans, and other multi drug-resistant pathogens. The minimum inhibitory concentration of the antimicrobial metabolites was 25-100 μg mL-1. The study manifests the optimization and utilization of different fermentation media which best suits for increased production of the secondary metabolites from Streptomyces cavourensis. This research suggests that the antimicrobial metabolites of strain MH16 found in M. hortensis has great potential for the biodiscovery of new anti-infective drugs against a wide range of multidrug-resistant pathogens.
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Affiliation(s)
- Soma Mondal
- Department of Studies in Microbiology, University of Mysore, Manasagangotri, Mysuru, Karnataka, 570 006, India.
| | - Vittal Ravishankar Rai
- Department of Studies in Microbiology, University of Mysore, Manasagangotri, Mysuru, Karnataka, 570 006, India.
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Sivapragasam S, Grove A. The Link between Purine Metabolism and Production of Antibiotics in Streptomyces. Antibiotics (Basel) 2019; 8:antibiotics8020076. [PMID: 31174282 PMCID: PMC6627660 DOI: 10.3390/antibiotics8020076] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 05/30/2019] [Accepted: 06/03/2019] [Indexed: 02/06/2023] Open
Abstract
Stress and starvation causes bacterial cells to activate the stringent response. This results in down-regulation of energy-requiring processes related to growth, as well as an upregulation of genes associated with survival and stress responses. Guanosine tetra- and pentaphosphates (collectively referred to as (p)ppGpp) are critical for this process. In Gram-positive bacteria, a main function of (p)ppGpp is to limit cellular levels of GTP, one consequence of which is reduced transcription of genes that require GTP as the initiating nucleotide, such as rRNA genes. In Streptomycetes, the stringent response is also linked to complex morphological differentiation and to production of secondary metabolites, including antibiotics. These processes are also influenced by the second messenger c-di-GMP. Since GTP is a substrate for both (p)ppGpp and c-di-GMP, a finely tuned regulation of cellular GTP levels is required to ensure adequate synthesis of these guanosine derivatives. Here, we discuss mechanisms that operate to control guanosine metabolism and how they impinge on the production of antibiotics in Streptomyces species.
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Affiliation(s)
- Smitha Sivapragasam
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.
| | - Anne Grove
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.
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Ludwig P, Sévin DC, Busche T, Kalinowski J, Bourdeaux F, Grininger M, Mack M. Characterization of the small flavin-binding dodecin in the roseoflavin producer Streptomyces davawensis. Microbiology (Reading) 2019; 164:908-919. [PMID: 29856311 DOI: 10.1099/mic.0.000662] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Genes encoding dodecin proteins are present in almost 20 % of archaeal and in more than 50 % of bacterial genomes. Archaeal dodecins bind riboflavin (vitamin B2), are thought to play a role in flavin homeostasis and possibly also help to protect cells from radical or oxygenic stress. Bacterial dodecins were found to bind riboflavin-5'-phosphate (also called flavin mononucleotide or FMN) and coenzyme A, but their physiological function remained unknown. In this study, we set out to investigate the relevance of dodecins for flavin metabolism and oxidative stress management in the phylogenetically related bacteria Streptomyces coelicolor and Streptomyces davawensis. Additionally, we explored the role of dodecins with regard to resistance against the antibiotic roseoflavin, a riboflavin analogue produced by S. davawensis. Our results show that the dodecin of S. davawensis predominantly binds FMN and is neither involved in roseoflavin biosynthesis nor in roseoflavin resistance. In contrast to S. davawensis, growth of S. coelicolor was not reduced in the presence of plumbagin, a compound, which induces oxidative stress. Plumbagin treatment stimulated expression of the dodecin gene in S. davawensis but not in S. coelicolor. Deletion of the dodecin gene in S. davawensis generated a recombinant strain which, in contrast to the wild-type, was fully resistant to plumbagin. Subsequent metabolome analyses revealed that the S. davawensis dodecin deletion strain exhibited a very different stress response when compared to the wild-type indicating that dodecins broadly affect cellular physiology.
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Affiliation(s)
- Petra Ludwig
- Institute for Technical Microbiology, Mannheim University of Applied Sciences, 68163 Mannheim, Germany
| | - Daniel C Sévin
- Institute of Molecular Systems Biology, ETH Zürich, 8093 Zürich, Switzerland
| | - Tobias Busche
- Center for Biotechnology, Bielefeld University, 33615 Bielefeld, Germany
| | - Jörn Kalinowski
- Center for Biotechnology, Bielefeld University, 33615 Bielefeld, Germany
| | - Florian Bourdeaux
- Institute of Organic Chemistry and Chemical Biology, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Martin Grininger
- Institute of Organic Chemistry and Chemical Biology, Goethe University Frankfurt, 60438 Frankfurt am Main, Germany
| | - Matthias Mack
- Institute for Technical Microbiology, Mannheim University of Applied Sciences, 68163 Mannheim, Germany
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Dimitrova-Stefanova DB, Gocheva BT. Screening for production of proteinase inhibitors by Antarctic Streptomycetes. J Basic Microbiol 2018; 58:1033-1042. [PMID: 30238488 DOI: 10.1002/jobm.201800102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/02/2018] [Accepted: 09/01/2018] [Indexed: 11/12/2022]
Abstract
Three out of 17 Streptomycetes strains - Streptomyces sp. 35 LBG09, Streptomyces sp. 36 LBG09, and Streptomyces sp. 39 LBG09, were selected based on the high production of proteinase inhibitors with trypsin serine proteinase activity. The strains were isolated from soil samples taken from the area around the Bulgarian station on Livingston Island, Antarctica. Biosynthesis of proteinase inhibitors by the promising strains started at different stages of their development but was generally not associated with the growth of the producers. Peak levels were reached in the stationary phase (96-120 h) of their cultivation. Inducing effects on strain development, biomass accumulation, and proteinase inhibitor biosynthesis were based on the composition of the nutrient medium: the polypeptones contained in Taguchi medium and glucose as a carbon source. The most productive out of the three strains was Streptomyces sp. 36 LBG09. Its maximum inhibitory activity was reached at 96 h in culturing media modified by three different carbon sources. The active proteinase inhibitor biosynthesis proceeded at pH values between 6.8 and 8.6 and the dynamics of production depended on the type of carbon source. Peak levels of extracellular protein and dry biomass were reached at 120 h in the stationary growth phase. The residual sugars were minimal at the end of the process when using soluble starch as a carbon source, and maximal when glucose was used.
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Spasic J, Mandic M, Radivojevic J, Jeremic S, Vasiljevic B, Nikodinovic-Runic J, Djokic L. Biocatalytic potential of Streptomyces spp. isolates from rhizosphere of plants and mycorrhizosphere of fungi. Biotechnol Appl Biochem 2018; 65:822-833. [PMID: 29797672 DOI: 10.1002/bab.1664] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 05/10/2018] [Indexed: 11/09/2022]
Abstract
Biocatalytic potential of Streptomyces strains isolated from the rhizosphere of plants and from mycorrhizosphere of fungi has been investigated. A total of 118 Streptomyces isolates were selected and functionally screened for 10 different biotechnologically important enzymatic activities: hydrolase (cellulase, cutinase, gelatinase, lipase, protease, polyhydroxyalkanoate (PHA) depolymerase), phenol oxidase and peroxidase (laccase, tyrosinase, and lignin peroxidase), and aminotransferase. Out of 118 tested Streptomyces spp., 90% showed at least one enzymatic activity. The most abundant were enzymes involved in the biomass degradation, as the production of cutinase, cellulase, and lignin peroxidase were detected in 31%, 40%, and 48% of the isolates, respectively. The improved specific activities of lipase (isolates BV315 and BV100) and tyrosinase (isolates BV87 and BV88) were shown in comparison with the industrially relevant activities of Pseudomonas strains. Plant rhizosphere soils were more prolific source of Streptomyces strains with biocatalytic potential in comparison with mycorrhizosphere soils. Overall, 284 enzyme activities among 118 Streptomyces isolates have been detected. This is the first comprehensive screening of Streptomyces isolates from rhizosphere and mycorrhizosphere soils for novel biocatalysts, showing that specific environmental habitats, such as rhizosphere soils, are "treasure troves" of Streptomyces with biocatalytic potential.
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Affiliation(s)
- Jelena Spasic
- Institute of Molecular Genetics and Genetic Engineering , University of Belgrade, Belgrade, Serbia
| | - Mina Mandic
- Institute of Molecular Genetics and Genetic Engineering , University of Belgrade, Belgrade, Serbia
| | - Jelena Radivojevic
- Institute of Molecular Genetics and Genetic Engineering , University of Belgrade, Belgrade, Serbia
| | - Sanja Jeremic
- Institute of Molecular Genetics and Genetic Engineering , University of Belgrade, Belgrade, Serbia
| | - Branka Vasiljevic
- Institute of Molecular Genetics and Genetic Engineering , University of Belgrade, Belgrade, Serbia
| | | | - Lidija Djokic
- Institute of Molecular Genetics and Genetic Engineering , University of Belgrade, Belgrade, Serbia
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Spasic J, Mandic M, Djokic L, Nikodinovic-Runic J. Streptomyces spp. in the biocatalysis toolbox. Appl Microbiol Biotechnol 2018; 102:3513-36. [PMID: 29502181 DOI: 10.1007/s00253-018-8884-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 02/17/2018] [Accepted: 02/19/2018] [Indexed: 02/07/2023]
Abstract
About 20,100 research publications dated 2000-2017 were recovered searching the PubMed and Web of Science databases for Streptomyces, which are the richest known source of bioactive molecules. However, these bacteria with versatile metabolism are powerful suppliers of biocatalytic tools (enzymes) for advanced biotechnological applications such as green chemical transformations and biopharmaceutical and biofuel production. The recent technological advances, especially in DNA sequencing coupled with computational tools for protein functional and structural prediction, and the improved access to microbial diversity enabled the easier access to enzymes and the ability to engineer them to suit a wider range of biotechnological processes. The major driver behind a dramatic increase in the utilization of biocatalysis is sustainable development and the shift toward bioeconomy that will, in accordance to the UN policy agenda "Bioeconomy to 2030," become a global effort in the near future. Streptomyces spp. already play a significant role among industrial microorganisms. The intention of this minireview is to highlight the presence of Streptomyces in the toolbox of biocatalysis and to give an overview of the most important advances in novel biocatalyst discovery and applications. Judging by the steady increase in a number of recent references (228 for the 2000-2017 period), it is clear that biocatalysts from Streptomyces spp. hold promises in terms of valuable properties and applicative industrial potential.
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Wypij M, Czarnecka J, Świecimska M, Dahm H, Rai M, Golinska P. Synthesis, characterization and evaluation of antimicrobial and cytotoxic activities of biogenic silver nanoparticles synthesized from Streptomyces xinghaiensis OF1 strain. World J Microbiol Biotechnol 2018; 34:23. [PMID: 29305718 PMCID: PMC5756267 DOI: 10.1007/s11274-017-2406-3] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 12/30/2017] [Indexed: 01/16/2023]
Abstract
We report synthesis of silver nanoparticles (AgNPs) from Streptomyces xinghaiensis OF1 strain, which were characterised by UV-Vis and Fourier transform infrared spectroscopy, Zeta sizer, Nano tracking analyser, and Transmission electron microscopy. The antimicrobial activity of AgNPs alone, and in combination with antibiotics was evaluated against bacteria, namely Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus subtilis, and yeasts viz., Candida albicans and Malassezia furfur by using micro-dilution method. The minimum inhibitory concentration (MIC) and minimum biocidal concentration of AgNPs against bacterial and yeast strains were determined. Synergistic effect of AgNPs in combination with antibacterial and antifungal antibiotics was determined by FIC index. In addition, MTT assay was performed to study cytotoxicity of AgNPs alone and in combination with antibiotics against mouse fibroblasts and HeLa cell line. Biogenic AgNPs were stable, spherical, small, polydispersed and capped with organic compounds. The variable antimicrobial activity of AgNPs was observed against tested bacteria and yeasts. The lowest MIC (16 µg ml-1) of AgNPs was found against P. aeruginosa, followed by C. albicans and M. furfur (both 32 µg ml-1), B. subtilis and E. coli (both 64 µg ml-1), and then S. aureus and Klebsiella pneumoniae (256 µg ml-1). The high synergistic effect of antibiotics in combination with AgNPs against tested strains was found. The in vitro cytotoxicity of AgNPs against mouse fibroblasts and cancer HeLa cell lines revealed a dose dependent potential. The IC50 value of AgNPs was found in concentrations of 4 and 3.8 µg ml-1, respectively. Combination of AgNPs and antibiotics significantly decreased concentrations of both antimicrobials used and retained their high antibacterial and antifungal activity. The synthesis of AgNPs using S. xinghaiensis OF1 strain is an eco-friendly, cheap and nontoxic method. The antimicrobial activity of AgNPs could result from their small size. Remarkable synergistic effect of antibiotics and AgNPs offer their valuable potential in nanomedicine for clinical application as a combined therapy in the future.
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Affiliation(s)
- Magdalena Wypij
- Department of Microbiology, Nicolaus Copernicus University, Lwowska 1, 87 100, Toruń, Poland
| | - Joanna Czarnecka
- Department of Biochemistry, Nicolaus Copernicus University, Lwowska 1, 87 100, Toruń, Poland
| | - Magdalena Świecimska
- Department of Microbiology, Nicolaus Copernicus University, Lwowska 1, 87 100, Toruń, Poland
| | - Hanna Dahm
- Department of Microbiology, Nicolaus Copernicus University, Lwowska 1, 87 100, Toruń, Poland
| | - Mahendra Rai
- Nanobiotechnology Lab, Department of Biotechnology, SGB Amravati University, Amravati, Maharashtra, 444602, India
| | - Patrycja Golinska
- Department of Microbiology, Nicolaus Copernicus University, Lwowska 1, 87 100, Toruń, Poland.
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Jonns JA, Brooks PR, Exley P, Poole S, Kurtböke Dİ. Streptophage-mediated control of off-flavour taint producing streptomycetes isolated from barramundi ponds. Synth Syst Biotechnol 2017; 2:105-112. [PMID: 29062967 PMCID: PMC5636946 DOI: 10.1016/j.synbio.2017.04.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Revised: 04/12/2017] [Accepted: 04/12/2017] [Indexed: 01/15/2023] Open
Abstract
Off-flavour taint of aquaculture products is a global issue reducing consumer confidence in the farmed produce as they are taken up via the gills of fish, and deposited in the lipids of the animal. If the fish are not purged, resulting undesirable muddy earthy flavour taint can be tasted by consumers. These undesirable flavour and odour is caused by the terpenoid compounds namely geosmin and 2-methylisoborneol, produced as secondary metabolites by certain bacteria including the cyanobacteria and actinomycetes. Current strategies to remediate the problem rely on treating the symptoms not the cause and involve the use of time consuming purging methods and costly chemicals. Biological control using bacteriophages, specific to the problem causing bacteria, offers a natural alternative to chemical control, which might reduce further complications of copper based algaecides and its subsequent implications on water quality. In an adaptation of such biological control approach streptomycetes isolated from barramundi ponds were tested for their susceptibility to streptophages to understand whether host destruction via phage lysis would subsequently eliminate off-flavour taint productions by these isolates. Following the determination of the streptophage susceptibility of the isolates one of the most odourous streptomycete species (USC-14510) was selected to be tested further using different pond simulations resembling real-life applications. Geosmin was tested as the indicator of off-flavour taint production and as it has been previously reported that the cyanobacteria-actinomycete interactions occurring in ponds result in even greater levels of geosmin and 2-methylisoborneol, the geosmin levels for the isolate in the presence of cyanobacteria and streptophages were also tested. Findings indicated that the highly odourous Streptomyces species (USC-14510) once infected with streptophages, can lose its capacity to produce off-flavour taints. Pond simulation studies also revealed geosmin production was significantly reduced when streptophages were introduced into the pond water where streptomycete species were grown. The bacteriophage control method developed in the presented study might again confirm significant potential for the bacteriophage-mediated remediation strategy to be adapted by the aquaculture industry.
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Affiliation(s)
- Jodi Anne Jonns
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
| | - Peter Richard Brooks
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
| | - Paul Exley
- Innovative Food Technologies, Department of Agriculture and Fisheries, Health and Food Sciences Precinct, Block 10, 39 Kessels Road, Coopers Plains, Brisbane, QLD, 4108, Australia
| | - Sue Poole
- Innovative Food Technologies, Department of Agriculture and Fisheries, Health and Food Sciences Precinct, Block 10, 39 Kessels Road, Coopers Plains, Brisbane, QLD, 4108, Australia
| | - D. İpek Kurtböke
- Genecology Research Centre, Faculty of Science, Health, Education and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, 4558, Australia
- Corresponding author.
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13
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Romero-Rodríguez A, Ruiz-Villafán B, Tierrafría VH, Rodríguez-Sanoja R, Sánchez S. Carbon Catabolite Regulation of Secondary Metabolite Formation and Morphological Differentiation in Streptomyces coelicolor. Appl Biochem Biotechnol 2016; 180:1152-1166. [PMID: 27372741 DOI: 10.1007/s12010-016-2158-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 06/03/2016] [Indexed: 10/21/2022]
Abstract
In the genus Streptomyces, carbon utilization is of significant importance for the expression of genes involved in morphological differentiation and antibiotic production. However, there is little information about the mechanism involved in these effects. In the present work, it was found that glucose exerted a suppressive effect on the Streptomyces coelicolor actinorhodin (Act) and undecylprodigiosin (Red) production, as well as in its morphological differentiation. Accordingly, using a high-density microarray approach in S. coelicolor grown under glucose repression, at early growth stages, a negative effect was exerted on the transcription of genes involved in Act and Red production, when compared with non-repressive conditions. Seven genes of Act and at least ten genes of Red production were down-regulated by glucose. Stronger repression was observed on the initial steps of antibiotics formation. On the contrary, the coelimycin P1 cluster was up-regulated by glucose. Regarding differentiation, no sporulation was observed in the presence of glucose and expression of a set of genes of the bld cascade was repressed as well as chaplins and rodlins genes. Finally, a series of transcriptional regulators involved in both processes were up- or down-regulated by glucose. This is the first global transcriptomic approach performed to understand the molecular basis of the glucose effect on the synthesis of secondary metabolism and differentiation in the genus Streptomyces. The results of this study are opening new avenues for further exploration.
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Affiliation(s)
- A Romero-Rodríguez
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, 04510, Cd. de Mexico, Mexico
| | - B Ruiz-Villafán
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, 04510, Cd. de Mexico, Mexico
| | - V H Tierrafría
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, 04510, Cd. de Mexico, Mexico
| | - R Rodríguez-Sanoja
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, 04510, Cd. de Mexico, Mexico
| | - S Sánchez
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, 04510, Cd. de Mexico, Mexico.
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14
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Abstract
Streptomyces species belong to the phylum Actinobacteria and can only grow with oxygen as a terminal electron acceptor. Like other members of this phylum, such as corynebacteria and mycobacteria, the aerobic respiratory chain lacks a soluble cytochrome c. It is therefore implicit that direct electron transfer between the cytochrome bc1 and the cytochrome aa3 oxidase complexes occurs. The complex developmental cycle of streptomycetes manifests itself in the production of spores, which germinate in the presence of oxygen into a substrate mycelium that greatly facilitates acquisition of nutrients necessary to support their saprophytic lifestyle in soils. Due to the highly variable oxygen levels in soils, streptomycetes have developed means of surviving long periods of hypoxia or even anaerobiosis but they fail to grow under these conditions. Little to nothing is understood about how they maintain viability under conditions of oxygen limitation. It is assumed that they can utilise a number of different electron acceptors to help them maintain a membrane potential, one of which is nitrate. The model streptomycete remains Streptomyces coelicolor A3(2), and it synthesises three nonredundant respiratory nitrate reductases (Nar). These Nar enzymes are synthesised during different phases of the developmental cycle and they are functional only under oxygen-limiting (<5% oxygen in air) conditions. Nevertheless, the regulation of their synthesis does not appear to be responsive to nitrate and in the case of Nar1, it appears to be developmentally regulated. This review highlights some of the novel aspects of our current, but somewhat limited, knowledge of respiration in these fascinating bacteria.
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Affiliation(s)
- R G Sawers
- Institute for Biology/Microbiology, Martin-Luther University Halle-Wittenberg, Halle (Saale), Germany.
| | - D Falke
- Institute for Biology/Microbiology, Martin-Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - M Fischer
- Institute for Biology/Microbiology, Martin-Luther University Halle-Wittenberg, Halle (Saale), Germany
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15
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Schütze E, Ahmed E, Voit A, Klose M, Greyer M, Svatoš A, Merten D, Roth M, Holmström SJM, Kothe E. Siderophore production by streptomycetes-stability and alteration of ferrihydroxamates in heavy metal-contaminated soil. Environ Sci Pollut Res Int 2015; 22:19376-19383. [PMID: 25414032 DOI: 10.1007/s11356-014-3842-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Accepted: 11/10/2014] [Indexed: 06/04/2023]
Abstract
Heavy metal-contaminated soil derived from a former uranium mining site in Ronneburg, Germany, was used for sterile mesocosms inoculated with the extremely metal-resistant Streptomyces mirabilis P16B-1 or the sensitive control strain Streptomyces lividans TK24. The production and fate of bacterial hydroxamate siderophores in soil was analyzed, and the presence of ferrioxamines E, B, D, and G was shown. While total ferrioxamine concentrations decreased in water-treated controls after 30 days of incubation, the sustained production by the bacteria was seen. For the individual molecules, alteration between neutral and cationic forms and linearization of hydroxamates was observed for the first time. Mesocosms inoculated with biomass of either strain showed changes of siderophore contents compared with the non-treated control indicating for auto-alteration and consumption, respectively, depending on the vital bacteria present. Heat stability and structural consistency of siderophores obtained from sterile culture filtrate were shown. In addition, low recovery (32 %) from soil was shown, indicating adsorption to soil particles or soil organic matter. Fate and behavior of hydroxamate siderophores in metal-contaminated soils may affect soil properties as well as conditions for its inhabiting (micro)organisms.
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Affiliation(s)
- Eileen Schütze
- Microbial Communication, Institute of Microbiology, Faculty of Biology and Pharmacy, Friedrich Schiller University Jena, Neugasse 25, 07745, Jena, Germany
| | - Engy Ahmed
- Department of Geological Sciences, Stockholm University, Svante Arrhenius väg 8, 10691, Stockholm, Sweden
| | - Annekatrin Voit
- Microbial Communication, Institute of Microbiology, Faculty of Biology and Pharmacy, Friedrich Schiller University Jena, Neugasse 25, 07745, Jena, Germany
| | - Michael Klose
- Microbial Communication, Institute of Microbiology, Faculty of Biology and Pharmacy, Friedrich Schiller University Jena, Neugasse 25, 07745, Jena, Germany
| | - Matthias Greyer
- Microbial Communication, Institute of Microbiology, Faculty of Biology and Pharmacy, Friedrich Schiller University Jena, Neugasse 25, 07745, Jena, Germany
| | - Aleš Svatoš
- Research Group Mass Spectrometry, Max Planck Institute for Chemical Ecology, Hans-Knöll-Straße 8, 07745, Jena, Germany
| | - Dirk Merten
- Hydrogeology, Institute for Geosciences, Faculty of Chemistry and Earth Sciences, Friedrich Schiller University Jena, Burgweg 11, 07749, Jena, Germany
| | - Martin Roth
- Bio Pilot Plant, Leibniz-Institute for Natural Product Research and Infection Biology-Hans Knöll Institute HKI, Jena, Germany
| | - Sara J M Holmström
- Department of Geological Sciences, Stockholm University, Svante Arrhenius väg 8, 10691, Stockholm, Sweden
| | - Erika Kothe
- Microbial Communication, Institute of Microbiology, Faculty of Biology and Pharmacy, Friedrich Schiller University Jena, Neugasse 25, 07745, Jena, Germany.
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Abstract
During the last few decades, Streptomycetes have shown to be a very important and adaptable group of bacteria for the production of various beneficial secondary metabolites. These secondary metabolites have been of great interest in academia and the pharmaceutical industries. To date, a vast variety of techniques and tools for metabolic engineering of relevant structural biosynthetic gene clusters have been developed. The main aim of this review is to summarize and discuss the published literature on tools for metabolic engineering of Streptomyces over the last decade. These strategies involve precursor engineering, structural and regulatory gene engineering, and the up or downregulation of genes, as well as genome shuffling and the use of genome scale metabolic models, which can reconstruct bacterial metabolic pathways to predict phenotypic changes and hence rationalize engineering strategies. These tools are continuously being developed to simplify the engineering strategies for this vital group of bacteria.
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Affiliation(s)
- Valerie Bekker
- a School of Molecular and Cell Biology; University of the Witwatersrand; Johannesburg, South Africa
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17
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Caraveo L, Medina H, Rodríguez-Buenfil I, Montalvo-Romero C, Evangelista-Martínez Z. A simple plate-assay for screening extracellular naringinase produced by streptomycetes. J Microbiol Methods 2014; 102:8-11. [PMID: 24742969 DOI: 10.1016/j.mimet.2014.04.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 04/04/2014] [Accepted: 04/06/2014] [Indexed: 10/25/2022]
Abstract
A simple plate-assay was developed with the purpose of detecting extracellular naringinase in streptomycetes. The naringin agar medium (NAM) was prepared by mixing carbon utilization medium (ISP9) and naringin. The clearing zones around colonies are correlated with the enzymatic activity. The assay validation was performed through the use of commercial naringinase (Penicillium decumbens).
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Affiliation(s)
- Leonela Caraveo
- Universidad Autónoma del Carmen, Ciudad del Carmen, Campeche México
| | - Héctor Medina
- Universidad Autónoma del Carmen, Ciudad del Carmen, Campeche México
| | - Ingrid Rodríguez-Buenfil
- Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A.C. (CIATEJ, A.C.) Unidad Sureste, Yucatán, México
| | | | - Zahaed Evangelista-Martínez
- Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A.C. (CIATEJ, A.C.) Unidad Sureste, Yucatán, México.
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Vartak A, Mutalik V, Parab RR, Shanbhag P, Bhave S, Mishra PD, Mahajan GB. Isolation of a new broad spectrum antifungal polyene from Streptomyces sp. MTCC 5680. Lett Appl Microbiol 2014; 58:591-6. [PMID: 24517845 DOI: 10.1111/lam.12229] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 02/05/2014] [Accepted: 02/05/2014] [Indexed: 11/25/2022]
Abstract
UNLABELLED A new polyene macrolide antibiotic PN00053 was isolated from the fermentation broth of Streptomyces sp. wild-type strain MTCC-5680. The producer strain was isolated from fertile mountain soil of Naldehra region, Himachal Pradesh, India. The compound PN00053 was purified through various steps of chromatographic techniques and bio-activity guided fractionation followed by its characterization using physiochemical properties, spectral data ((1) H-NMR, (13) C-NMR, HMBC, HSQC, and COSY) and MS analysis. PN00053 exhibited broad spectrum in vitro antifungal activity against strains of Aspergillus fumigatus (HMR), A. fumigatus ATCC 16424, Candida albicans (I.V.), C. albicans ATCC 14503, C. krusei GO6, C. glabrata HO4, Cryptococcus neoformans, Trichophyton sp. as well as fluconazole resistant strains C. krusei GO3 and C. glabrata HO5. It did not inhibit growth of gram positive and gram-negative bacteria, displaying its specificity against fungi. SIGNIFICANCE AND IMPACT OF THE STUDY PN00053 is a novel polyene macrolide isolated from a wild strain of Streptomyces sp. PM0727240 (MTCC5680), an isolate from the mountainous rocky regions of Himachal Pradesh, India. The compound is a new derivative of the antibiotic Roflamycoin [32, 33-didehydroroflamycoin (DDHR)]. It displayed broad spectrum antifungal activity against yeast and filamentous fungi. However, it did not show any antibacterial activity. The in vitro study revealed that PN00053 has better potency as compared to clinical gold standard fluconazole. The development of pathogenic resistance against the polyenes has been seldom reported. Hence, we envisage PN00053 could be a potential antifungal lead.
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Affiliation(s)
- A Vartak
- Department of Natural products-Biology, Piramal Enterprises Limited, Mumbai, India
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19
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Schütze E, Klose M, Merten D, Nietzsche S, Senftleben D, Roth M, Kothe E. Growth of streptomycetes in soil and their impact on bioremediation. J Hazard Mater 2014; 267:128-135. [PMID: 24440654 DOI: 10.1016/j.jhazmat.2013.12.055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Revised: 12/16/2013] [Accepted: 12/26/2013] [Indexed: 06/03/2023]
Abstract
The impact of the extremely heavy metal resistant actinomycete Streptomyces mirabilis P16B-1 on heavy metal mobilization/stabilization, phytoremediation and stress level of plants was analyzed in the presence and absence of Sorghum bicolor in sterile microcosms containing highly metal contaminated or control soil. For control, a metal sensitive S. lividans TK24 was used. The metal contents with respect to the mobile and specifically adsorbed fractions of the contaminated soil were considerably decreased by addition of both, living and dead biomass of the strains, with the heavy metal resistant S. mirabilis P16B-1 showing considerably higher impact. Both strains could grow in control soil, while only S. mirabilis P16B-1 formed new tip growth in the metal contaminated soil. A plant growth promoting effect was visible for S. mirabilis P16B-1 in contaminated soil enhancing the dry weight of inoculated Sorghum plants. Thus, metal resistant strains like S. mirabilis P16B-1 are able to enhance phytoremediation of heavy metal contaminated soils.
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Affiliation(s)
- Eileen Schütze
- Microbial Communication, Institute of Microbiology, Faculty of Biology and Pharmacy, Friedrich-Schiller-University, Jena, Germany
| | - Michael Klose
- Microbial Communication, Institute of Microbiology, Faculty of Biology and Pharmacy, Friedrich-Schiller-University, Jena, Germany
| | - Dirk Merten
- Applied Geology, Institute of Geosciences, Faculty of Chemistry and Earth Sciences, Friedrich-Schiller-University, Jena, Germany
| | - Sandor Nietzsche
- Centre for Electron Microscopy, Jena University Hospital, Jena, Germany
| | - Dominik Senftleben
- Microbial Communication, Institute of Microbiology, Faculty of Biology and Pharmacy, Friedrich-Schiller-University, Jena, Germany
| | - Martin Roth
- Bio Pilot Plant, Leibniz-Institute for Natural Product Research and Infection Biology - Hans-Knöll-Institute HKI, Jena, Germany
| | - Erika Kothe
- Microbial Communication, Institute of Microbiology, Faculty of Biology and Pharmacy, Friedrich-Schiller-University, Jena, Germany.
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20
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Rückert C, Szczepanowski R, Albersmeier A, Goesmann A, Iftime D, Musiol EM, Blin K, Wohlleben W, Pühler A, Kalinowski J, Weber T. Complete genome sequence of the kirromycin producer Streptomyces collinus Tü 365 consisting of a linear chromosome and two linear plasmids. J Biotechnol 2013; 168:739-40. [PMID: 24140291 DOI: 10.1016/j.jbiotec.2013.10.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2013] [Accepted: 10/04/2013] [Indexed: 11/29/2022]
Abstract
Streptomyces collinus Tü 365 (DSMZ 40733), isolated from Kouroussa (Guinea), is the producer of the elfamycin family antibiotic kirromycin, which inhibits bacterial protein biosynthesis by interfering with elongation factor EF-Tu. Here, we report on the Streptomyces collinus Tü 365 complete genome sequence of the 8.27 MB chromosome and the two plasmids SCO1 and SCO2.
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Affiliation(s)
- Christian Rückert
- Technologieplattform Genomik, Centrum für Biotechnologie, Universität Bielefeld, Universitätsstr. 27, 33615 Bielefeld, Germany
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21
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Johansson E, Reponen T, Vesper S, Levin L, Lockey J, Ryan P, Bernstein DI, Villareal M, Hershey GKK, Schaffer C, LeMasters G. Microbial content of household dust associated with exhaled NO in asthmatic children. Environ Int 2013; 59:141-147. [PMID: 23807177 PMCID: PMC3759577 DOI: 10.1016/j.envint.2013.05.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 05/22/2013] [Accepted: 05/23/2013] [Indexed: 06/02/2023]
Abstract
Exhaled nitric oxide (eNO) is increasingly used as a non-invasive measure of airway inflammation. Despite this, little information exists regarding the potential effects of indoor microbial components on eNO. We determined the influence of microbial contaminants in house dust and other indoor environmental characteristics on eNO levels in seven-year-olds with and without a physician-diagnosis of asthma. The study included 158 children recruited from a birth cohort study, and 32 were physician-diagnosed as asthmatic. The relationship between eNO levels and exposures to home dust streptomycetes, endotoxin, and molds was investigated. Streptomycetes and endotoxin were analyzed both as loads and concentrations in separate models. Dog, cat, and dust mite allergens also were evaluated. In the multivariate exposure models, high streptomycetes loads and concentrations were significantly associated with a decrease in eNO levels in asthmatic (p<0.001) but not in healthy children. The presence of dog allergen, however, was associated with increased levels of eNO (p=0.001). Dust endotoxin was not significant. The relationship between eNO and indoor exposure to common outdoor molds was u-shaped. In non-asthmatic children, none of the exposure variables was significantly associated with eNO levels. To our knowledge, this is the first study demonstrating a significant association between microbial components in the indoor environment and eNO levels in asthmatic children. This study demonstrates the importance of simultaneously assessing multiple home exposures of asthmatic children to better understand opposing effects. Common components of the indoor Streptomyces community may beneficially influence airway inflammation.
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Affiliation(s)
- Elisabet Johansson
- Department of Environmental Health, University of Cincinnati, Box 670056, Cincinnati, OH 45267-0056, USA
| | - Tiina Reponen
- Department of Environmental Health, University of Cincinnati, Box 670056, Cincinnati, OH 45267-0056, USA
| | - Stephen Vesper
- US Environmental Protection Agency, 26 W. M. L. King Drive, Cincinnati, OH 45268, USA
| | - Linda Levin
- Department of Environmental Health, University of Cincinnati, Box 670056, Cincinnati, OH 45267-0056, USA
| | - James Lockey
- Department of Environmental Health, University of Cincinnati, Box 670056, Cincinnati, OH 45267-0056, USA
- Department of Internal Medicine, University of Cincinnati, OH, USA
| | - Patrick Ryan
- Department of Environmental Health, University of Cincinnati, Box 670056, Cincinnati, OH 45267-0056, USA
- Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, USA
| | - David I. Bernstein
- Department of Environmental Health, University of Cincinnati, Box 670056, Cincinnati, OH 45267-0056, USA
- Department of Internal Medicine, University of Cincinnati, OH, USA
| | - Manuel Villareal
- Department of Internal Medicine, University of Cincinnati, OH, USA
| | | | - Chris Schaffer
- Department of Environmental Health, University of Cincinnati, Box 670056, Cincinnati, OH 45267-0056, USA
| | - Grace LeMasters
- Department of Environmental Health, University of Cincinnati, Box 670056, Cincinnati, OH 45267-0056, USA
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