251
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Bibliometric Analysis of Global Research on Clavulanic Acid. Antibiotics (Basel) 2018; 7:antibiotics7040102. [PMID: 30486255 PMCID: PMC6316524 DOI: 10.3390/antibiotics7040102] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Revised: 10/18/2018] [Accepted: 10/18/2018] [Indexed: 11/17/2022] Open
Abstract
Clavulanic acid (CA), a potent inhibitor of the β-lactam, ase enzyme, is frequently co-formulated with a broad spectrum of antibiotics to treat infections caused by β-lactamase-producing pathogens. In order to evaluate the impact and the progress of CA studies in the last four decades, a bibliometric analysis of the global scientific production of CA was carried out. A total of 39,758 records in the field of CA were indexed in the Scopus database for a 43-year period of study (1975⁻2017). The results indicated that CA studies have grown, showing three phases (1975⁻1999, 2000⁻2003 and 2004⁻2017) based on records of publications; the results showed a sigmoidal profile. Medicine was the main subject area for CA studies, whereas biochemistry, genetics and molecular biology were areas of research for CA production by Streptomyces clavuligerus (S. clavuligerus). Nevertheless, chemical engineering (as a subject area) had the highest increase in the percentage of publications related to CA production by S. clavuligerus. The United States, France, the United Kingdom, Spain and Brazil were the leading countries in the scientific production of studies on both CA and CA related to S. clavuligerus. This analysis allowed the identification of the area of knowledge with the highest impact on CA studies, the top researchers and their geographic distribution, and also helped to highlight the existence of antibiotic-resistant bacteria as an emergent area in CA research.
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252
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Cloning and Expression of the Chitinase Encoded by ChiKJ406136 from Streptomyces Sampsonii (Millard & Burr) Waksman KJ40 and Its Antifungal Effect. FORESTS 2018. [DOI: 10.3390/f9110699] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The present study demonstrated that the chitinase gene ChiKJ406136 of Streptomyces sampsonii (Millard & Burr) Waksman KJ40 could be cloned using a PCR protocol and expressed in Escherichia coli (Migula) Castellani & Chalmers BL21 (DE3), and the recombinant protein had antifungal effect on four forest pathogens (Cylindrocladium scoparium Morgan, Cryphonectria parasitica (Murrill) Barr, Neofusicoccum parvum Crous, and Fusarium oxysporum Schl.) and also had the biological control effects on Eucalyptus robusta Smith leaf blight, Castanea mollissima BL. blight, Juglans regia L. blight and J. regia root rot. The results showed that ChiKJ406136 was efficiently expressed and a 48 kilodalton (kDa) recombinant protein was obtained. No significant change in protein production was observed in the presence of different concentrations of IPTG (isopropyl-b-D-thio-galactoside). The purified protein yield was greatest in the 150 mmol/L imidazole elution fraction, and the chitinase activities of the crude protein and purified protein solutions were 0.045 and 0.033 U/mL, respectively. The antifungal effects indicated that mycelial cells of the four fungi were disrupted, and the control effects of the chitinase on four forest diseases showed significant differences among the undiluted 10- and 20-fold dilutions and the control. The undiluted solution exhibited best effect. The results of this study provide a foundation for the use of S. sampsonii as a biocontrol agent and provides a new source for the chitinase gene, providing a theoretical basis for its application.
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253
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Terra L, Dyson PJ, Hitchings MD, Thomas L, Abdelhameed A, Banat IM, Gazze SA, Vujaklija D, Facey PD, Francis LW, Quinn GA. A Novel Alkaliphilic Streptomyces Inhibits ESKAPE Pathogens. Front Microbiol 2018; 9:2458. [PMID: 30459722 PMCID: PMC6232825 DOI: 10.3389/fmicb.2018.02458] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 09/25/2018] [Indexed: 01/20/2023] Open
Abstract
In an effort to stem the rising tide of multi-resistant bacteria, researchers have turned to niche environments in the hope of discovering new varieties of antibiotics. We investigated an ethnopharmacological (cure) from an alkaline/radon soil in the area of Boho, in the Fermanagh Scarplands (N. Ireland) for the presence of Streptomyces, a well-known producer of antibiotics. From this soil we isolated a novel (closest relative 57% of genome relatedness) Streptomyces sp. capable of growth at high alkaline pH (10.5) and tolerant of gamma radiation to 4 kGy. Genomic sequencing identified many alkaline tolerance (antiporter/multi-resistance) genes compared to S. coelicolor M145 (at 3:1), hence we designated the strain Streptomyces sp. myrophorea, isolate McG1, from the Greek, myro (fragrance) and phorea (porter/carrier). In vitro tests demonstrated the ability of the Streptomyces sp. myrophorea, isolate McG1 to inhibit the growth of many strains of ESKAPE pathogens; most notably carbapenem-resistant Acinetobacter baumannii (a critical pathogen on the WHO priority list of antibiotic-resistant bacteria), vancomycin-resistant Enterococcus faecium, and methicillin-resistant Staphylococcus aureus (both listed as high priority pathogens). Further in silico prediction of antimicrobial potential of Streptomyces sp. myrophorea, isolate McG1 by anti-SMASH and RAST software identified many secondary metabolite and toxicity resistance gene clusters (45 and 27, respectively) as well as many antibiotic resistance genes potentially related to antibiotic production. Follow-up in vitro tests show that the Streptomyces sp. myrophorea, isolate McG1 was resistant to 28 out of 36 clinical antibiotics. Although not a comprehensive analysis, we think that some of the Boho soils' reputed curative properties may be linked to the ability of Streptomyces sp. myrophorea, isolate McG1 to inhibit ESKAPE pathogens. More importantly, further analysis may elucidate other key components that could alleviate the tide of multi-resistant nosocomial infections.
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Affiliation(s)
- Luciana Terra
- Institute of Life Sciences, Swansea University Medical School, Swansea, United Kingdom
| | - Paul J Dyson
- Institute of Life Sciences, Swansea University Medical School, Swansea, United Kingdom
| | - Matthew D Hitchings
- Institute of Life Sciences, Swansea University Medical School, Swansea, United Kingdom
| | - Liam Thomas
- Institute of Life Sciences, Swansea University Medical School, Swansea, United Kingdom
| | - Alyaa Abdelhameed
- Institute of Life Sciences, Swansea University Medical School, Swansea, United Kingdom
| | - Ibrahim M Banat
- School of Biomedical Sciences, Ulster University, Coleraine, United Kingdom
| | - Salvatore A Gazze
- Institute of Life Sciences, Swansea University Medical School, Swansea, United Kingdom
| | - Dušica Vujaklija
- Laboratory for Molecular Genetics, Ruđer Bošković Institute, Zagreb, Croatia
| | - Paul D Facey
- Institute of Life Sciences, Swansea University Medical School, Swansea, United Kingdom
| | - Lewis W Francis
- Institute of Life Sciences, Swansea University Medical School, Swansea, United Kingdom
| | - Gerry A Quinn
- Laboratory for Molecular Genetics, Ruđer Bošković Institute, Zagreb, Croatia
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254
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Kemung HM, Tan LTH, Khan TM, Chan KG, Pusparajah P, Goh BH, Lee LH. Streptomyces as a Prominent Resource of Future Anti-MRSA Drugs. Front Microbiol 2018; 9:2221. [PMID: 30319563 PMCID: PMC6165876 DOI: 10.3389/fmicb.2018.02221] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 08/30/2018] [Indexed: 01/21/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) pose a significant health threat as they tend to cause severe infections in vulnerable populations and are difficult to treat due to a limited range of effective antibiotics and also their ability to form biofilm. These organisms were once limited to hospital acquired infections but are now widely present in the community and even in animals. Furthermore, these organisms are constantly evolving to develop resistance to more antibiotics. This results in a need for new clinically useful antibiotics and one potential source are the Streptomyces which have already been the source of several anti-MRSA drugs including vancomycin. There remain large numbers of Streptomyces potentially undiscovered in underexplored regions such as mangrove, deserts, marine, and freshwater environments as well as endophytes. Organisms from these regions also face significant challenges to survival which often result in the production of novel bioactive compounds, several of which have already shown promise in drug development. We review the various mechanisms of antibiotic resistance in MRSA and all the known compounds isolated from Streptomyces with anti-MRSA activity with a focus on those from underexplored regions. The isolation of the full array of compounds Streptomyces are potentially capable of producing in the laboratory has proven a challenge, we also review techniques that have been used to overcome this obstacle including genetic cluster analysis. Additionally, we review the in vivo work done thus far with promising compounds of Streptomyces origin as well as the animal models that could be used for this work.
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Affiliation(s)
- Hefa Mangzira Kemung
- Novel Bacteria and Drug Discovery Research Group, Biomedicine Research Advancement Centre, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia.,Biofunctional Molecule Exploratory Research Group, Biomedicine Research Advancement Centre, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Loh Teng-Hern Tan
- Novel Bacteria and Drug Discovery Research Group, Biomedicine Research Advancement Centre, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia.,Biofunctional Molecule Exploratory Research Group, Biomedicine Research Advancement Centre, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia.,Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Tahir Mehmood Khan
- Novel Bacteria and Drug Discovery Research Group, Biomedicine Research Advancement Centre, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia.,Biofunctional Molecule Exploratory Research Group, Biomedicine Research Advancement Centre, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia.,The Institute of Pharmaceutical Sciences (IPS), University of Veterinary and Animal Sciences (UVAS), Lahore, Pakistan
| | - Kok-Gan Chan
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia.,International Genome Centre, Jiangsu University, Zhenjiang, China
| | - Priyia Pusparajah
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Bey-Hing Goh
- Novel Bacteria and Drug Discovery Research Group, Biomedicine Research Advancement Centre, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia.,Biofunctional Molecule Exploratory Research Group, Biomedicine Research Advancement Centre, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia.,Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Mueang Phayao, Thailand
| | - Learn-Han Lee
- Novel Bacteria and Drug Discovery Research Group, Biomedicine Research Advancement Centre, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia.,Biofunctional Molecule Exploratory Research Group, Biomedicine Research Advancement Centre, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia.,Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Malaysia.,Center of Health Outcomes Research and Therapeutic Safety (Cohorts), School of Pharmaceutical Sciences, University of Phayao, Mueang Phayao, Thailand
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255
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Planckaert S, Jourdan S, Francis IM, Deflandre B, Rigali S, Devreese B. Proteomic Response to Thaxtomin Phytotoxin Elicitor Cellobiose and to Deletion of Cellulose Utilization Regulator CebR in Streptomyces scabies. J Proteome Res 2018; 17:3837-3852. [DOI: 10.1021/acs.jproteome.8b00528] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sören Planckaert
- Laboratory for Microbiology, Department of Biochemistry and Microbiology, Ghent University, B-9000 Ghent, Belgium
| | - Samuel Jourdan
- InBioS − Center for Protein Engineering, University of Liège, Institut de Chimie, B-4000 Liège, Belgium
| | - Isolde M. Francis
- Department of Biology, California State University Bakersfield, Bakersfield, California 93311-1022, United States
| | - Benoit Deflandre
- InBioS − Center for Protein Engineering, University of Liège, Institut de Chimie, B-4000 Liège, Belgium
| | - Sébastien Rigali
- InBioS − Center for Protein Engineering, University of Liège, Institut de Chimie, B-4000 Liège, Belgium
| | - Bart Devreese
- Laboratory for Microbiology, Department of Biochemistry and Microbiology, Ghent University, B-9000 Ghent, Belgium
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256
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Sahmoune MN. Performance of Streptomyces rimosus biomass in biosorption of heavy metals from aqueous solutions. Microchem J 2018. [DOI: 10.1016/j.microc.2018.05.009] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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257
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Paulus C, Rebets Y, Zapp J, Rückert C, Kalinowski J, Luzhetskyy A. New Alpiniamides From Streptomyces sp. IB2014/011-12 Assembled by an Unusual Hybrid Non-ribosomal Peptide Synthetase Trans-AT Polyketide Synthase Enzyme. Front Microbiol 2018; 9:1959. [PMID: 30186270 PMCID: PMC6113372 DOI: 10.3389/fmicb.2018.01959] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 08/02/2018] [Indexed: 11/13/2022] Open
Abstract
The environment of Lake Baikal is a well-known source of microbial diversity. The strain Streptomyces sp. IB2014/011-12, isolated from samples collected at Lake Baikal, was found to exhibit potent activity against Gram-positive bacteria. Here, we report isolation and characterization of linear polyketide alpiniamide A (1) and its new derivatives B-D (2-5). The structures of alpiniamides A-D were established and their relative configuration was determined by combination of partial Murata's method and ROESY experiment. The absolute configuration of alpiniamide A was established through Mosher's method. The gene cluster, responsible for the biosynthesis of alpiniamides (alp) has been identified by genome mining and gene deletion experiments. The successful expression of the cloned alp gene cluster in a heterologous host supports these findings. Analysis of the architecture of the alp gene cluster and the feeding of labeled precursors elucidated the alpiniamide biosynthetic pathway. The biosynthesis of alpiniamides is an example of a rather simple polyketide assembly line generating unusual chemical diversity through the combination of domain/module skipping and double bond migration events.
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Affiliation(s)
- Constanze Paulus
- Helmholtz-Institute for Pharmaceutical Research Saarland, Saarbrücken, Germany
- Department for Pharmaceutical Biotechnology, University of Saarland, Saarbrücken, Germany
| | - Yuriy Rebets
- Department for Pharmaceutical Biotechnology, University of Saarland, Saarbrücken, Germany
| | - Josef Zapp
- Department for Pharmaceutical Biotechnology, University of Saarland, Saarbrücken, Germany
| | - Christian Rückert
- Center for Biotechnology (CeBiTec), Bielefeld University, Bielefeld, Germany
| | - Jörn Kalinowski
- Center for Biotechnology (CeBiTec), Bielefeld University, Bielefeld, Germany
| | - Andriy Luzhetskyy
- Helmholtz-Institute for Pharmaceutical Research Saarland, Saarbrücken, Germany
- Department for Pharmaceutical Biotechnology, University of Saarland, Saarbrücken, Germany
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258
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Viana Marques DDA, Machado SEF, Ebinuma VCS, Duarte CDAL, Converti A, Porto ALF. Production of β-Lactamase Inhibitors by Streptomyces Species. Antibiotics (Basel) 2018; 7:E61. [PMID: 30018235 PMCID: PMC6163296 DOI: 10.3390/antibiotics7030061] [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: 05/30/2018] [Revised: 07/07/2018] [Accepted: 07/12/2018] [Indexed: 12/11/2022] Open
Abstract
β-Lactamase inhibitors have emerged as an effective alternative to reduce the effects of resistance against β-lactam antibiotics. The Streptomyces genus is known for being an exceptional natural source of antimicrobials and β-lactamase inhibitors such as clavulanic acid, which is largely applied in clinical practice. To protect against the increasing prevalence of multidrug-resistant bacterial strains, new antibiotics and β-lactamase inhibitors need to be discovered and developed. This review will cover an update about the main β-lactamase inhibitors producers belonging to the Streptomyces genus; advanced methods, such as genetic and metabolic engineering, to enhance inhibitor production compared with wild-type strains; and fermentation and purification processes. Moreover, clinical practice and commercial issues are discussed. The commitment of companies and governments to develop innovative strategies and methods to improve the access to new, efficient, and potentially cost-effective microbial products to combat the antimicrobial resistance is also highlighted.
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Affiliation(s)
- Daniela de Araújo Viana Marques
- Campus Serra Talhada, University of Pernambuco, Avenida Custódio Conrado, 600, AABB, Serra Talhada, Pernambuco 56912-550, Brazil.
| | - Suellen Emilliany Feitosa Machado
- Department of Antibiotics, Federal University of Pernambuco, Avenida da Engenharia, 2° andar, Cidade Universitária, Recife, Pernambuco 50740-600, Brazil.
| | - Valéria Carvalho Santos Ebinuma
- Department of Bioprocesses and Biotechnology, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Rodovia Araraquara-Jaú/Km 01, Araraquara 14800-903, Brazil.
| | | | - Attilio Converti
- Department of Civil, Chemical and Environmental Engineering, Chemical Pole, University of Genoa, Via Opera Pia 15, 16145 Genoa, Italy.
| | - Ana Lúcia Figueiredo Porto
- Department of Morphology and Animal Physiology, Federal Rural University of Pernambuco, Av. Dom Manoel de Medeiros, Recife, Pernambuco 52171-900, Brazil.
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259
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Singh V, Haque S, Khare S, Tiwari AK, Katiyar D, Banerjee B, Kumari K, Tripathi CKM. Isolation and purification of antibacterial compound from Streptomyces levis collected from soil sample of north India. PLoS One 2018; 13:e0200500. [PMID: 29990382 PMCID: PMC6039041 DOI: 10.1371/journal.pone.0200500] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 06/27/2018] [Indexed: 11/18/2022] Open
Abstract
During the screening programme for microbial cultures producing antimicrobial agents, an active microbial strain of Streptomyces was isolated from the agricultural soil of Narnaul, Haryana India. Physiological, biochemical characteristics and 16S ribosomal RNA sequence homology studies revealed that it was similar to Streptomyces levis (sequence similarity 100%). The microbial strain was submitted to Genomebio Technologies Pvt. Ltd., Pune, Maharashtra, India under Accession No. EU124569. The isolated strain was found to produce extracellular active compound showing strong antimicrobial activity against Klebsiella pneumoniae MTCC 109, Pseudomonas aeruginosa MTCC 741 and Staphylococcus aureus MTCC 96. The antibacterial compound was successfully isolated and purified. Structure elucidation of antibacterial metabolite with EI-MS/ HRMS showed molecular ion peak at m/z 686 [M+H]+. Whereas, elemental analysis of the said compound showed C = 61.31, H = 8.61, N = 2.04 and O = 28.02, and indicated a molecular formula of C35H59NO12. The presence of ‘chromone’ nucleus in the compound’s chemical structure was confirmed by using 1HNMR studies. The present study reports the purification of potential antibacterial compound from Streptomyces levis isolated from the unexplored soil of north India and warrants for further characterization of this potential compound for optimum utilization for antimicrobial purposes.
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Affiliation(s)
- Vineeta Singh
- Microbiology Division, CSIR - Central Drug Research Institute, Lucknow, Uttar Pradesh, India
- Department of Biotechnology, Institute of Engineering and Technology, Lucknow, Uttar Pradesh, India
- * E-mail:
| | - Shafiul Haque
- Research and Scientific Studies Unit, College of Nursing and Allied Health Sciences, Jazan University, Jazan, Saudi Arabia
| | - Shruti Khare
- Microbiology Division, CSIR - Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Anil Kumar Tiwari
- Department of Chemistry, Lucknow University, Lucknow, Uttar Pradesh, India
| | - Diksha Katiyar
- Department of Chemistry, MMV, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Bikram Banerjee
- Microbiology Division, CSIR - Central Drug Research Institute, Lucknow, Uttar Pradesh, India
| | - Krishna Kumari
- Department of Biotechnology, Shri Ramswaroop Memorial University, Lucknow, Uttar Pradesh, India
| | - C. K. M. Tripathi
- Department of Biotechnology, Shri Ramswaroop Memorial University, Lucknow, Uttar Pradesh, India
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260
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Bolourian A, Mojtahedi Z. Streptomyces, shared microbiome member of soil and gut, as ‘old friends’ against colon cancer. FEMS Microbiol Ecol 2018; 94:5037917. [DOI: 10.1093/femsec/fiy120] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 06/12/2018] [Indexed: 12/14/2022] Open
Affiliation(s)
- Alireza Bolourian
- School of Life Sciences, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Las Vegas, Nevada 89154, USA
| | - Zahra Mojtahedi
- Institute for Cancer Research, Shiraz University of Medical Sciences, Zand street, Shiraz 71348, Iran
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261
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Palanisamy N. Identification of putative drug targets and annotation of unknown proteins in Tropheryma whipplei. Comput Biol Chem 2018; 76:130-138. [PMID: 30005292 DOI: 10.1016/j.compbiolchem.2018.05.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 01/02/2018] [Accepted: 05/27/2018] [Indexed: 12/17/2022]
Abstract
Tropheryma whipplei (T. whipplei) is the causative agent of Whipple's disease and blood culture-negative endocarditis. Due to the variability of symptoms, the disease is often poorly diagnosed. Treatment for this bacterial infection is often lengthy, and improper uptake of antibiotics has resulted in relapses in many patients. In the present study, using available bioinformatic tools and databases such as the Cluster Database at High Identity with Tolerance (CD-HIT), the Basic Local Alignment Search Tool for proteins (BLASTp), the Database of Essential Genes (DEG), and the DrugBank database, 13 putative drug targets were identified in T. whipplei by subtractive genome analysis that could be targeted with currently available drugs (experimental or approved). Further, a 3D model was generated for one of these putative drug targets, the T. whipplei DNA ligase, and in silico docking was performed with pyridochromanone and adenosine-derived inhibitors using the AutoDock Vina. Additionally, many of the T. whipplei protein sequences in the National Center for Biotechnology Information (NCBI) protein database were unknown/uncurated. Using available web servers e.g. the KEGG Automatic Annotation Server (KAAS), the BLASTp, the Conserved Domain Architecture Retrieval Tool (CDAT) and the Protein families (Pfam), the function/remote/domain homology for nearly 80% of these uncurated protein sequences were annotated. The data obtained in the present study will aid physicians and researchers alike in curbing this bacterial infection.
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Affiliation(s)
- Navaneethan Palanisamy
- Molecular and Cellular Engineering Group, BioQuant, University of Heidelberg, Heidelberg, Germany; The Hartmut Hoffmann-Berling International Graduate School of Molecular and Cellular Biology (HBIGS), University of Heidelberg, Heidelberg, Germany.
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262
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Agamennone V, Roelofs D, van Straalen NM, Janssens TKS. Antimicrobial activity in culturable gut microbial communities of springtails. J Appl Microbiol 2018; 125:740-752. [PMID: 29723440 DOI: 10.1111/jam.13899] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 04/01/2018] [Accepted: 04/25/2018] [Indexed: 01/11/2023]
Abstract
AIMS The rise of antibiotic resistance pushes the pharmaceutical industry to continually search for substances with new structures and novel mechanisms of action. Many environmental niches are still to be explored as sources of antimicrobials. In this paper, we assess the antimicrobial potential of gut microbes of springtails, soil invertebrates which live in a microbe-dominated environment and are known to be tolerant to entomopathogenic micro-organisms. METHODS AND RESULTS Bacteria isolated from the guts of five springtail species were tested for inhibitory activity against different microbial pathogens. We identified 46 unique isolates belonging to 17 genera and 15 families. Thirty-five of these isolates (76%) showed inhibitory activity, and 18 inhibited both bacterial and fungal pathogens. One isolate was active against all the pathogens tested. CONCLUSIONS We demonstrated a range of antimicrobial activities in bacteria isolated from the guts of springtails, indicative of complex interactions within the gut community, possibly relating to nutrition or defence against pathogens. SIGNIFICANCE AND IMPACT OF THE STUDY Our results suggest that a large proportion of cultivatable microbes associated with Collembola have a potential for antimicrobial production. We propose that soil invertebrates and their associated microbes are interesting targets for drug discovery.
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Affiliation(s)
- V Agamennone
- Department of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - D Roelofs
- Department of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - N M van Straalen
- Department of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - T K S Janssens
- Department of Ecological Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,Microlife Solutions, Amsterdam, The Netherlands
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263
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Hug JJ, Bader CD, Remškar M, Cirnski K, Müller R. Concepts and Methods to Access Novel Antibiotics from Actinomycetes. Antibiotics (Basel) 2018; 7:E44. [PMID: 29789481 PMCID: PMC6022970 DOI: 10.3390/antibiotics7020044] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 05/14/2018] [Accepted: 05/17/2018] [Indexed: 12/25/2022] Open
Abstract
Actinomycetes have been proven to be an excellent source of secondary metabolites for more than half a century. Exhibiting various bioactivities, they provide valuable approved drugs in clinical use. Most microorganisms are still untapped in terms of their capacity to produce secondary metabolites, since only a small fraction can be cultured in the laboratory. Thus, improving cultivation techniques to extend the range of secondary metabolite producers accessible under laboratory conditions is an important first step in prospecting underexplored sources for the isolation of novel antibiotics. Currently uncultured actinobacteria can be made available by bioprospecting extreme or simply habitats other than soil. Furthermore, bioinformatic analysis of genomes reveals most producers to harbour many more biosynthetic gene clusters than compounds identified from any single strain, which translates into a silent biosynthetic potential of the microbial world for the production of yet unknown natural products. This review covers discovery strategies and innovative methods recently employed to access the untapped reservoir of natural products. The focus is the order of actinomycetes although most approaches are similarly applicable to other microbes. Advanced cultivation methods, genomics- and metagenomics-based approaches, as well as modern metabolomics-inspired methods are highlighted to emphasise the interplay of different disciplines to improve access to novel natural products.
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Affiliation(s)
- Joachim J Hug
- Department Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Campus E8.1, 66123 Saarbrücken, Germany.
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany.
| | - Chantal D Bader
- Department Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Campus E8.1, 66123 Saarbrücken, Germany.
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany.
| | - Maja Remškar
- Department Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Campus E8.1, 66123 Saarbrücken, Germany.
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany.
| | - Katarina Cirnski
- Department Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Campus E8.1, 66123 Saarbrücken, Germany.
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany.
| | - Rolf Müller
- Department Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Campus E8.1, 66123 Saarbrücken, Germany.
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany.
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264
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Dave UC, Kadeppagari RK. Purification and characterization of Alanine dehydrogenase from Streptomyces anulatus for its application as a bioreceptor in biosensor. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.02.026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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265
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Masand M, Sivakala KK, Menghani E, Thinesh T, Anandham R, Sharma G, Sivakumar N, Jebakumar SRD, Jose PA. Biosynthetic Potential of Bioactive Streptomycetes Isolated From Arid Region of the Thar Desert, Rajasthan (India). Front Microbiol 2018; 9:687. [PMID: 29720968 PMCID: PMC5915549 DOI: 10.3389/fmicb.2018.00687] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 03/23/2018] [Indexed: 12/19/2022] Open
Abstract
Acquisition of Actinobacteria, especially Streptomyces from previously underexplored habitats and the exploration of their biosynthetic potential have gained much attention in the rejuvenated antibiotics search programs. Herein, we isolated some Streptomyces strains, from an arid region of the Great Indian Thar Desert, which possess an ability to produce novel bioactive compounds. Twenty-one morphologically distinctive strains differing in their aerial and substrate mycelium were isolated by employing a stamping method. Among them, 12 strains were identified by a two-level antimicrobial screening method, exerting antimicrobial effects against a panel of indicator strains including methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus species. Based on their potent antimicrobial activity, four isolates were further explored by 16S rRNA gene-based identification, genetic screening, and metabolomic analysis; and it was found that these strains belong to the genus Streptomyces. The selected strains were found to have polyketide synthase and non-ribosomal peptide synthetase systems. In addition, extracellular metabolomic screening revealed that the isolates produced analogs of doxorubicinol, pyrromycin, erythromycin, and 6-13 other putative novel metabolites. These results demonstrate the significance of Streptomyces inhabiting the arid region of Thar Desert, suggesting that similar arid environments can be considered as the reservoirs of novel Streptomyces strains that could have biotechnological significance.
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Affiliation(s)
- Meeta Masand
- School of Life Sciences, Suresh Gyan Vihar University, Jaipur, India
| | | | - Ekta Menghani
- Department of Biotechnology, School of Sciences, JECRC University, Jaipur, India
| | - Thangathurai Thinesh
- Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India
| | - Rangasamy Anandham
- Department of Agricultural Microbiology, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai, India
| | - Gaurav Sharma
- School of Life Sciences, Suresh Gyan Vihar University, Jaipur, India
| | - Natesan Sivakumar
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai, India
| | - Solomon R D Jebakumar
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai, India
| | - Polpass Arul Jose
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai, India
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266
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Norouzi H, Danesh A, Mohseni M, Rabbani Khorasgani M. Marine Actinomycetes with Probiotic Potential and Bioactivity against Multidrug-resistant Bacteria. INTERNATIONAL JOURNAL OF MOLECULAR AND CELLULAR MEDICINE 2018; 7:44-52. [PMID: 30234072 PMCID: PMC6134418 DOI: 10.22088/ijmcm.bums.7.1.44] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 03/29/2018] [Indexed: 11/20/2022]
Abstract
Considering antimicrobial resistance problem, marine microorganisms with the bioactivity against multi-drug resistant (MDR) pathogens have attracted many scientific interests. To address this issue, a total of 21 marine actinomycetes isolated from the Caspian Sea have been screened out. Primary screening via cross-streak method revealed that 3 strains: MN2, MN39, and MN40 produce antimicrobial agents with wide spectrum activity. In the second step, the potent strains were characterized morphologically, and then identified genetically using 16S rRNA analysis. After that, the bioactivity of the ethyl acetate extracts of liquid culture against some MDR bacteria has been studied using disc diffusion method. Finally, the exoenzymatic activity of the strains, and the anti-vibrio activity of the extracts have been evaluated. The nucleotide sequence of the 16S rRNA gene (1.5 kb) showed that the potent strains belong to the genus Streptomyces. The results of disk diffusion method indicated that among the 3 potent isolates, MN39 and MN2 produce biomolecules with antibacterial activity against MDR bacteria specially methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus (VRE). In addition, potent strains showed remarkable anti-vibrio activity as well as extracellular enzyme production including amylase and protease. The results of this study revealed that the marine actinomycetes isolated from the sediments of Caspian Sea produce biomolecules effective against MDR bacteria, and suggested that these strains deserve to be studied as potential probiotics due to their anti-vibrio activity besides exoenzyme production.
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Affiliation(s)
- Hamed Norouzi
- Department of Biology, University of Isfahan, Isfahan, Iran
| | - Abolghasem Danesh
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mojtaba Mohseni
- Department of Microbiology, University of Mazandaran, Babolsar, Iran
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267
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Vurukonda SSKP, Giovanardi D, Stefani E. Plant Growth Promoting and Biocontrol Activity of Streptomyces spp. as Endophytes. Int J Mol Sci 2018; 19:E952. [PMID: 29565834 PMCID: PMC5979581 DOI: 10.3390/ijms19040952] [Citation(s) in RCA: 218] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 03/12/2018] [Accepted: 03/16/2018] [Indexed: 01/12/2023] Open
Abstract
There has been many recent studies on the use of microbial antagonists to control diseases incited by soilborne and airborne plant pathogenic bacteria and fungi, in an attempt to replace existing methods of chemical control and avoid extensive use of fungicides, which often lead to resistance in plant pathogens. In agriculture, plant growth-promoting and biocontrol microorganisms have emerged as safe alternatives to chemical pesticides. Streptomyces spp. and their metabolites may have great potential as excellent agents for controlling various fungal and bacterial phytopathogens. Streptomycetes belong to the rhizosoil microbial communities and are efficient colonizers of plant tissues, from roots to the aerial parts. They are active producers of antibiotics and volatile organic compounds, both in soil and in planta, and this feature is helpful for identifying active antagonists of plant pathogens and can be used in several cropping systems as biocontrol agents. Additionally, their ability to promote plant growth has been demonstrated in a number of crops, thus inspiring the wide application of streptomycetes as biofertilizers to increase plant productivity. The present review highlights Streptomyces spp.-mediated functional traits, such as enhancement of plant growth and biocontrol of phytopathogens.
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Affiliation(s)
| | - Davide Giovanardi
- Department of Life Sciences, University of Modena and Reggio Emilia, via Amendola 2, 42122 Reggio Emilia, Italy.
| | - Emilio Stefani
- Department of Life Sciences, University of Modena and Reggio Emilia, via Amendola 2, 42122 Reggio Emilia, Italy.
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268
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Abstract
The human β-site amyloid cleaving enzyme (BACE1) has been considered as an effective drug target for treatment of Alzheimer’s disease (AD). In this study, Urechis unicinctus (U. unicinctus), which is a Far East specialty food known as innkeeper worm, ethanol extract was studied by bioassay-directed fractionation and isolation to examine its potential β-site amyloid cleaving enzyme inhibitory and antimicrobial activity. The following compounds were characterized: hecogenin, cholest-4-en-3-one, cholesta-4,6-dien-3-ol, and hurgadacin. These compounds were identified by their mass spectrometry, 1H, and 13C NMR spectral data, comparing those data with NIST/EPA/NIH Mass spectral database (NIST11) and published values. Hecogenin and cholest-4-en-3-one showed significant inhibitory activity against BACE1 with EC50 values of 116.3 and 390.6 µM, respectively. Cholesta-4,6-dien-3-ol and hurgadacin showed broad spectrum antimicrobial activity, particularly strongly against Escherichia coli (E. coli), Salmonella enterica (S. enterica), Pasteurella multocida (P. multocida), and Physalospora piricola (P. piricola), with minimal inhibitory concentration (MIC) ranging from 0.46 to 0.94 mg/mL. This is the first report regarding those four known compounds that were isolated from U. unicinctus and their anti-BACE1 and antimicrobial activity, highlighting the fact that known natural compounds may be a critical source of new medicine leads. These findings provide scientific evidence for potential application of those bioactive compounds for the development of AD drugs and antimicrobial agents.
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269
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Tsutsumi LS, Elmore JM, Dang UT, Wallace MJ, Marreddy R, Lee RB, Tan GT, Hurdle JG, Lee RE, Sun D. Solid-Phase Synthesis and Antibacterial Activity of Cyclohexapeptide Wollamide B Analogs. ACS COMBINATORIAL SCIENCE 2018; 20:172-185. [PMID: 29431987 DOI: 10.1021/acscombsci.7b00189] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Herein we report the antibacterial structure-activity relationships of cyclic hexapeptide wollamide analogs derived from solid-phase library synthesis. Wollamide B, a cyclic hexapeptide natural product, has been previously found to have activity against Mycobacterium bovis. To further evaluate its antimycobacterial/antibacterial potential, 27 peptides including wollamides A/B, and desotamide B, were synthesized and subsequently tested against a panel of clinically significant bacterial pathogens. Biological evaluation revealed that the cyclic scaffold, amide functionality in position I, tryptophan residue in position V, and the original stereochemistry pattern of the core scaffold were key for antituberculosis and/or antibacterial activity. In addition, against M. tuberculosis and Gram-positive bacteria, residues in position II and/or VI greatly impacted antibacterial activity and selectivity. Wollamides A (3) and B (2) along with their corresponding II (l-Leu) analog 10 retained the most promising antituberculosis activity, with the lowest minimum inhibitory concentration (MIC) against virulent M. tuberculosis H37Rv (MIC = 1.56 μg/mL), as well as desirable selectivity indices (>100). Importantly, the antimicrobial activities of wollamides A and B do not result from disruption of the bacterial membrane, warranting further investigation into their mechanism of action.
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Affiliation(s)
- Lissa S. Tsutsumi
- Department of Pharmaceutical Sciences, The Daniel K. Inouye College of Pharmacy, University of Hawai’i at Hilo, 34 Rainbow Drive, Hilo, Hawaii 96720, United States
| | - John M. Elmore
- Department of Chemical Biology & Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, MS#1000, Memphis, Tennessee 38105, United States
| | - Uyen T. Dang
- Center for Infectious and Inflammatory Diseases, Texas A&M Health Science Center, 2121 West Holcombe Blvd, Houston, Texas 77030, United States
| | - Miranda J. Wallace
- Department of Chemical Biology & Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, MS#1000, Memphis, Tennessee 38105, United States
| | - Ravikanthreddy Marreddy
- Center for Infectious and Inflammatory Diseases, Texas A&M Health Science Center, 2121 West Holcombe Blvd, Houston, Texas 77030, United States
| | - Robin B. Lee
- Department of Chemical Biology & Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, MS#1000, Memphis, Tennessee 38105, United States
| | - Ghee T. Tan
- Department of Pharmaceutical Sciences, The Daniel K. Inouye College of Pharmacy, University of Hawai’i at Hilo, 34 Rainbow Drive, Hilo, Hawaii 96720, United States
| | - Julian G. Hurdle
- Center for Infectious and Inflammatory Diseases, Texas A&M Health Science Center, 2121 West Holcombe Blvd, Houston, Texas 77030, United States
| | - Richard E. Lee
- Department of Chemical Biology & Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, MS#1000, Memphis, Tennessee 38105, United States
| | - Dianqing Sun
- Department of Pharmaceutical Sciences, The Daniel K. Inouye College of Pharmacy, University of Hawai’i at Hilo, 34 Rainbow Drive, Hilo, Hawaii 96720, United States
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270
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Abstract
Ever since antibiotics were introduced into human and veterinary medicine to treat and prevent bacterial infections there has been a steady selection and increase in the frequency of antibiotic resistant bacteria. To be able to reduce the rate of resistance evolution, we need to understand how various biotic and abiotic factors interact to drive the complex processes of resistance emergence and transmission. We describe several of the fundamental factors that underlay resistance evolution, including rates and niches of emergence and persistence of resistant bacteria, time- and space-gradients of various selective agents, and rates and routes of transmission of resistant bacteria between humans, animals and other environments. Furthermore, we discuss the options available to reduce the rate of resistance evolution and/ or transmission and their advantages and disadvantages.
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271
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Bioactivity Assessment of Indian Origin-Mangrove Actinobacteria against Candida albicans. Mar Drugs 2018; 16:md16020060. [PMID: 29439535 PMCID: PMC5852488 DOI: 10.3390/md16020060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 02/06/2018] [Accepted: 02/09/2018] [Indexed: 12/30/2022] Open
Abstract
Actinobacteria is found to have a potent metabolic activity against pathogens. The present study reveals the assessment of potent antifungal secondary metabolites from actinobacteria isolated from Indian marine mangrove sediments. The samples were collected from the coastal regions of Muthupet, Andaman and the Nicobar Islands. Identification was carried out using 16S rRNA analysis and biosynthetic genes (Polyketide synthase type I/II and Non-ribosomal peptide synthase) were screened. Actinobacteria were assayed for their antifungal activity against 16 clinical Candida albicans and the compound analysis was performed using gas chromatography-mass spectrometry GC-MS. The 31 actinobacterial strains were isolated and 16S rRNA gene sequencing revealed that this ecosystem is rich on actinobacteria, with Streptomyces as the predominant genus. The PCR based screening of biosynthetic genes revealed the presence of PKS-I in six strains, PKS-II in four strains and NRPS in 11 strains. The isolated actinobacteria VITGAP240 and VITGAP241 (two isolates) were found to have a potential antifungal activity against all the tested C. albicans. GC-MS results revealed that the actinobacterial compounds were belonging to heterocyclic, polyketides and peptides. Overall, the strains possess a wide spectrum of antifungal properties which affords the production of significant bioactive metabolites as potential antibiotics.
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272
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Effects of Agitation, Aeration and Temperature on Production of a Novel Glycoprotein GP-1 by Streptomyces kanasenisi ZX01 and Scale-Up Based on Volumetric Oxygen Transfer Coefficient. Molecules 2018; 23:molecules23010125. [PMID: 29324690 PMCID: PMC6017179 DOI: 10.3390/molecules23010125] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 12/26/2017] [Accepted: 01/05/2018] [Indexed: 11/16/2022] Open
Abstract
The effects of temperature, agitation and aeration on glycoprotein GP-1 production by Streptomyces kanasenisi ZX01 in bench-scale fermentors were systematically investigated. The maximum final GP-1 production was achieved at an agitation speed of 200 rpm, aeration rate of 2.0 vvm and temperature of 30 °C. By using a dynamic gassing out method, the effects of agitation and aeration on volumetric oxygen transfer coefficient (kLa) were also studied. The values of volumetric oxygen transfer coefficient in the logarithmic phase increased with increase of agitation speed (from 14.53 to 32.82 h−1) and aeration rate (from 13.21 to 22.43 h−1). In addition, a successful scale-up from bench-scale to pilot-scale was performed based on volumetric oxygen transfer coefficient, resulting in final GP-1 production of 3.92, 4.03, 3.82 and 4.20 mg/L in 5 L, 15 L, 70 L and 500 L fermentors, respectively. These results indicated that constant volumetric oxygen transfer coefficient was appropriate for the scale-up of batch fermentation of glycoprotein GP-1 by Streptomyces kanasenisi ZX01, and this scale-up strategy successfully achieved 100-fold scale-up from bench-scale to pilot-scale fermentor.
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273
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Zhou Y, Zhou X, Yu DL, Sang B, Feng JT, Han LR, Zhang X. Optimization of Fermentation Conditions and Bench-Scale for Improvement of a Novel Glycoprotein GP-1 Production by Streptomyces kanasenisi ZX01. Molecules 2018; 23:molecules23010137. [PMID: 29320442 PMCID: PMC6017659 DOI: 10.3390/molecules23010137] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 11/16/2022] Open
Abstract
GP-1 is a novel glycoprotein produced by Streptomyces kanasenisi ZX01 that was isolated from soil near Kanas Lake with significant bioactivity against tobacco mosaic virus. However, extremely low fermentation production has largely hindered further research and market applications on glycoprotein GP-1. In this study, response surface methodology was used to optimize fermentation conditions in a shake flask for higher glycoprotein GP-1 production. When the optimized fermentation conditions were inoculum volume of 6%, initial pH of 6.5, and rotating speed of 150 rpm, glycoprotein GP-1 production could reach 0.9253 mg/L, which was increased by 52.14% compared to the original conditions. In addition, scale-up fermentation was conducted in a 5-L bioreactor to preliminarily explore the feasibility for mass production of glycoprotein GP-1 in a large fermentor, obtaining GP-1 production of 2.54 mg/L under the same conditions, which was 2.75 times higher than the production obtained from a shake flask of 0.9253 mg/L. This work will be helpful to improve GP-1 production on a large scale and lay the foundations for developing it as a novel agent against plant virus.
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Affiliation(s)
- Yong Zhou
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling 712100, China.
| | - Xin Zhou
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling 712100, China.
| | - Dai-Lin Yu
- Agriculture Research Institute, Tibet Academy of Agricultural and Animal Husbandry Science, Lhasa 850032, China.
| | - Bu Sang
- Agriculture Research Institute, Tibet Academy of Agricultural and Animal Husbandry Science, Lhasa 850032, China.
| | - Jun-Tao Feng
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling 712100, China.
- Shaanxi Research Center of Biopesticide Engineering & Technology, Yangling 712100, China.
| | - Li-Rong Han
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling 712100, China.
- Shaanxi Research Center of Biopesticide Engineering & Technology, Yangling 712100, China.
| | - Xing Zhang
- Research and Development Center of Biorational Pesticide, Northwest Agriculture & Forestry University, Yangling 712100, China.
- Shaanxi Research Center of Biopesticide Engineering & Technology, Yangling 712100, China.
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274
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Pinheiro PF, Menini LAP, Bernardes PC, Saraiva SH, Carneiro JWM, Costa AV, Arruda TR, Lage MR, Gonçalves PM, Bernardes CDO, Alvarenga ES, Menini L. Semisynthetic Phenol Derivatives Obtained from Natural Phenols: Antimicrobial Activity and Molecular Properties. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2018; 66:323-330. [PMID: 29286652 DOI: 10.1021/acs.jafc.7b04418] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Semisynthetic phenol derivatives were obtained from the natural phenols: thymol, carvacrol, eugenol, and guaiacol through catalytic oxychlorination, Williamson synthesis, and aromatic Claisen rearrangement. The compounds characterization was carried out by 1H NMR, 13C NMR, and mass spectrometry. The natural phenols and their semisynthetic derivatives were tested for their antimicrobial activity against the bacteria: Staphylococcus aureus, Escherichia coli, Listeria innocua, Pseudomonas aeruginosa, Salmonella enterica Typhimurium, Salmonella enterica ssp. enterica, and Bacillus cereus. Minimum inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) values were determined using concentrations from 220 to 3.44 μg mL-1. Most of the tested compounds presented MIC values ≤220 μg mL-1 for all the bacteria used in the assays. The molecular properties of the compounds were computed with the PM6 method. Through principle components analysis, the natural phenols and their semisynthetic derivatives with higher antimicrobial potential were grouped.
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Affiliation(s)
| | | | | | | | - José Walkimar Mesquita Carneiro
- Department of Inorganic Chemistry, Federal Fluminense University Outeiro São Batista , CEP-24020-141 Niterói, Rio de Janeiro, Brazil
| | | | | | - Mateus Ribeiro Lage
- Federal University of Maranhão, Campus Rua José Leão, 484, Center , CEP-65800-000 Balsas, Maranhão, Brazil
| | | | | | - Elson Santiago Alvarenga
- Department of Chemistry, Federal University of Viçosa , Avenida Peter Henry Rolfs, s/n, 36570-900 Viçosa, Minas Gerais, Brazil
| | - Luciano Menini
- Laboratory of Applied Chemistry, Federal Institute of Education, Science, and Technology of Espírito Santo , Rodovia 482, Cachoeiro/Alegre, km 47 Distrito de Rive, 29500-000 Alegre, Espírito Santo, Brazil
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275
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Bhosale VA, Waghmode SB. Enantioselective total synthesis of pyrrolo-[2,1-c][1,4]-benzodiazepine monomers (S)-(−)-barmumycin and (S)-(+)-boseongazepine B. Org Chem Front 2018. [DOI: 10.1039/c8qo00446c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient enantioselective total synthesis of pyrrolo-[2,1-c][1,4]benzodiazepine (PBD) monomers (S)-(−)-barmumycin and (S)-(+)-boseongazepine B was achieved through a stereocontrolled strategy, which relies on a proline catalysed asymmetric α-amination and ester α-ethylenation.
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Affiliation(s)
- Viraj A. Bhosale
- Department of Chemistry
- Savitribai Phule Pune University (Formerly University of Pune)
- Pune 411007
- India
| | - Suresh B. Waghmode
- Department of Chemistry
- Savitribai Phule Pune University (Formerly University of Pune)
- Pune 411007
- India
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276
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Gehrke SS, Kumar G, Yokubynas NA, Côté JP, Wang W, French S, MacNair CR, Wright GD, Brown ED. Exploiting the Sensitivity of Nutrient Transporter Deletion Strains in Discovery of Natural Product Antimetabolites. ACS Infect Dis 2017; 3:955-965. [PMID: 29069544 DOI: 10.1021/acsinfecdis.7b00149] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Actinomycete secondary metabolites are a renowned source of antibacterial chemical scaffolds. Herein, we present a target-specific approach that increases the detection of antimetabolites from natural sources by screening actinomycete-derived extracts against nutrient transporter deletion strains. On the basis of the growth rescue patterns of a collection of 22 Escherichia coli (E. coli) auxotrophic deletion strains representative of the major nutrient biosynthetic pathways, we demonstrate that antimetabolite detection from actinomycete-derived extracts prepared using traditional extraction platforms is masked by nutrient supplementation. In particular, we find poor sensitivity for the detection of antimetabolites targeting vitamin biosynthesis. To circumvent this and as a proof of principle, we exploit the differential activity of actinomycete extracts against E. coli ΔyigM, a biotin transporter deletion strain versus wildtype E. coli. We achieve more than a 100-fold increase in antimetabolite sensitivity using this method and demonstrate a successful bioassay-guided purification of the known biotin antimetabolite, amiclenomycin. Our findings provide a unique solution to uncover the full potential of naturally derived antibiotics.
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Affiliation(s)
- Sebastian S. Gehrke
- Michael G. DeGroote
Institute of Infectious Disease Research, Department of Biochemistry
and Biomedical Science, McMaster University, 1200 Main Street West, Hamilton Ontario L8N 3ZS, Canada
| | - Garima Kumar
- Michael G. DeGroote
Institute of Infectious Disease Research, Department of Biochemistry
and Biomedical Science, McMaster University, 1200 Main Street West, Hamilton Ontario L8N 3ZS, Canada
| | - Nicole A. Yokubynas
- Michael G. DeGroote
Institute of Infectious Disease Research, Department of Biochemistry
and Biomedical Science, McMaster University, 1200 Main Street West, Hamilton Ontario L8N 3ZS, Canada
| | - Jean-Philippe Côté
- Michael G. DeGroote
Institute of Infectious Disease Research, Department of Biochemistry
and Biomedical Science, McMaster University, 1200 Main Street West, Hamilton Ontario L8N 3ZS, Canada
| | - Wenliang Wang
- Michael G. DeGroote
Institute of Infectious Disease Research, Department of Biochemistry
and Biomedical Science, McMaster University, 1200 Main Street West, Hamilton Ontario L8N 3ZS, Canada
| | - Shawn French
- Michael G. DeGroote
Institute of Infectious Disease Research, Department of Biochemistry
and Biomedical Science, McMaster University, 1200 Main Street West, Hamilton Ontario L8N 3ZS, Canada
| | - Craig R. MacNair
- Michael G. DeGroote
Institute of Infectious Disease Research, Department of Biochemistry
and Biomedical Science, McMaster University, 1200 Main Street West, Hamilton Ontario L8N 3ZS, Canada
| | - Gerard D. Wright
- Michael G. DeGroote
Institute of Infectious Disease Research, Department of Biochemistry
and Biomedical Science, McMaster University, 1200 Main Street West, Hamilton Ontario L8N 3ZS, Canada
| | - Eric D. Brown
- Michael G. DeGroote
Institute of Infectious Disease Research, Department of Biochemistry
and Biomedical Science, McMaster University, 1200 Main Street West, Hamilton Ontario L8N 3ZS, Canada
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277
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Feichtmayer J, Deng L, Griebler C. Antagonistic Microbial Interactions: Contributions and Potential Applications for Controlling Pathogens in the Aquatic Systems. Front Microbiol 2017; 8:2192. [PMID: 29184541 PMCID: PMC5694486 DOI: 10.3389/fmicb.2017.02192] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 10/25/2017] [Indexed: 12/21/2022] Open
Abstract
Despite the active and intense treatment of wastewater, pathogenic microorganisms and viruses are frequently introduced into the aquatic environment. For most human pathogens, however, this is a rather hostile place, where starvation, continuous inactivation, and decay generally occur, rather than successful reproduction. Nevertheless, a great diversity of the pathogenic microorganisms can be detected, in particular, in the surface waters receiving wastewater. Pathogen survival depends majorly on abiotic factors such as irradiation, changes in water ionic strength, temperature, and redox state. In addition, inactivation is enhanced by the biotic interactions in the environment. Although knowledge of the antagonistic biotic interactions has been available since a long time, certain underlying processes and mechanisms still remain unclear. Others are well-appreciated and increasingly are applied to the present research. Our review compiles and discusses the presently known biotic interactions between autochthonous microbes and pathogens introduced into the aquatic environment, including protozoan grazing, virus-induced bacterial cell lysis, antimicrobial substances, and predatory bacteria. An overview is provided on the present knowledge, as well as on the obvious research gaps. Individual processes that appear promising for future applications in the aquatic environment are presented and discussed.
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Affiliation(s)
- Judith Feichtmayer
- Institute of Groundwater Ecology, Helmholtz Zentrum München GmbH, Neuherberg, Germany
| | - Li Deng
- Institute of Groundwater Ecology, Helmholtz Zentrum München GmbH, Neuherberg, Germany
- Institute of Virology, Helmholtz Zentrum München GmbH, Neuherberg, Germany
| | - Christian Griebler
- Institute of Groundwater Ecology, Helmholtz Zentrum München GmbH, Neuherberg, Germany
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278
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Streptomyces swartbergensis sp. nov., a novel tyrosinase and antibiotic producing actinobacterium. Antonie van Leeuwenhoek 2017; 111:589-600. [PMID: 29110155 DOI: 10.1007/s10482-017-0979-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Accepted: 11/01/2017] [Indexed: 10/18/2022]
Abstract
As part of an antibiotic screening program, an actinobacterium, strain HMC13T, was isolated from soil collected from the banks of the Gamka River, Western Cape Province, South Africa. The isolate was found to produce branched mycelia that differentiated into spiral spore chains with spiny spores. 16S rRNA gene sequence analysis showed the strain to be closely related to Streptomyces caelestis NRRL 2418T (99.72%) and Streptomyces azureus NBRC 12744T (99.51%). Chemotaxonomic analyses confirmed the classification of the strain as a member of the genus Streptomyces: LL-DAP in the peptidoglycan, no diagnostic sugars in the whole cell sugar pattern, dominant menaquinones including MK9(H8), MK9(H6), and the polar lipids detected included phosphatidylethanolamine. The fatty acid profile revealed the presence of mostly branched, saturated fatty acids: iso-C15:0 (14.4%), anteiso-C15:0 (21.1%), iso-C16:0 (16.8%), C16:1ω7c/2-OH iso-C15:0 (5.8%), C16:0 (6.2%), iso-C17:1ω9c (5.8%), iso-C17:0 (5.9%), and anteiso-C17:0 (9.6%). Strain HMC13T is a tyrosinase producer and exhibits very strong antibiosis against Mycobacterium aurum A+ and Staphylococcus aureus subsp. aureus ATCC 33591 (methicillin resistant), while only weak activity was observed against Bacillus cereus ATCC 10876, Enterococcus faecium VanA (vancomycin resistant), Enterococcus faecalis ATCC 51299 (vancomycin resistant) and Candida tropicalis ATCC 750T. Strain HMC13T (= LMG 28849T = NRRL B-65294T) is proposed as the type strain of a new species, to be named Streptomyces swartbergensis sp. nov.
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279
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Ser HL, Tan LTH, Law JWF, Chan KG, Duangjai A, Saokaew S, Pusparajah P, Ab Mutalib NS, Khan TM, Goh BH, Lee LH. Focused Review: Cytotoxic and Antioxidant Potentials of Mangrove-Derived Streptomyces. Front Microbiol 2017; 8:2065. [PMID: 29163380 PMCID: PMC5672783 DOI: 10.3389/fmicb.2017.02065] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 10/09/2017] [Indexed: 12/31/2022] Open
Abstract
Human life expectancy is rapidly increasing with an associated increasing burden of chronic diseases, such as neurodegenerative diseases and cancer. However, there is limited progress in finding effective treatment for these conditions. For this reason, members of the genus Streptomyces have been explored extensively over the past decades as these filamentous bacteria are highly efficient in producing bioactive compounds with human health benefits. Being ubiquitous in nature, streptomycetes can be found in both terrestrial and marine environments. Previously, two Streptomyces strains (MUSC 137T and MUM 256) isolated from mangrove sediments in Peninsular Malaysia demonstrated potent antioxidant and cytotoxic activities against several human cancer cell lines on bioactivity screening. These results illustrate the importance of streptomycetes from underexplored regions aside from the terrestrial ecosystem. Here we provide the insights and significance of Streptomyces species in the search of anticancer and/or chemopreventive agents and highlight the impact of next generation sequencing on drug discovery from the Streptomyces arsenal.
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Affiliation(s)
- Hooi-Leng Ser
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Biomedical Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Malaysia
- Biofunctional Molecule Exploratory Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Loh Teng-Hern Tan
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Biofunctional Molecule Exploratory Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Jodi Woan-Fei Law
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Biofunctional Molecule Exploratory Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Kok-Gan Chan
- Division of Genetics and Molecular Biology, Faculty of Science, Institute of Biological Sciences, University of Malaya, Kuala Lumpur, Malaysia
- Vice Chancellor Office, Jiangsu University, Zhenjiang, China
| | - Acharaporn Duangjai
- Division of Physiology, School of Medical Sciences, University of Phayao, Phayao, Thailand
- Center of Health Outcomes Research and Therapeutic Safety, School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
| | - Surasak Saokaew
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Biofunctional Molecule Exploratory Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Center of Health Outcomes Research and Therapeutic Safety, School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
- Pharmaceutical Outcomes Research Center, Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok, Thailand
| | - Priyia Pusparajah
- Biomedical Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Nurul-Syakima Ab Mutalib
- UKM Medical Molecular Biology Institute, UKM Medical Centre, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
| | - Tahir Mehmood Khan
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Biofunctional Molecule Exploratory Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Department of Pharmacy, Absyn University Peshawar, Peshawar, Pakistan
- Asian Centre for Evidence Synthesis in Population, Implementation and Clinical Outcomes, Health and Well-Being Cluster, Global Asia in the 21st Century Platform, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Bey-Hing Goh
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Biofunctional Molecule Exploratory Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Center of Health Outcomes Research and Therapeutic Safety, School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
- Asian Centre for Evidence Synthesis in Population, Implementation and Clinical Outcomes, Health and Well-Being Cluster, Global Asia in the 21st Century Platform, Monash University Malaysia, Bandar Sunway, Malaysia
| | - Learn-Han Lee
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Biofunctional Molecule Exploratory Research Group, School of Pharmacy, Monash University Malaysia, Bandar Sunway, Malaysia
- Center of Health Outcomes Research and Therapeutic Safety, School of Pharmaceutical Sciences, University of Phayao, Phayao, Thailand
- Asian Centre for Evidence Synthesis in Population, Implementation and Clinical Outcomes, Health and Well-Being Cluster, Global Asia in the 21st Century Platform, Monash University Malaysia, Bandar Sunway, Malaysia
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280
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Ay H, Nouioui I, Del Carmen Montero-Calasanz M, Klenk HP, Isik K, Cetin D, Sahin N. Streptomyces sediminis sp. nov. isolated from crater lake sediment. Antonie van Leeuwenhoek 2017; 111:493-500. [PMID: 29079877 DOI: 10.1007/s10482-017-0970-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 10/24/2017] [Indexed: 01/06/2023]
Abstract
A novel actinobacterial strain, MKSP12T, was isolated from coastal sediment of a crater lake in central Anatolia, Turkey. The taxonomic position of the strain was clarified using a polyphasic approach. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain MKSP12T is closely related to Streptomyces specialis GW 41-1564T with 97.1% sequence similarity. The strain produces aerial hyphae that differentiate into spiral chains of smooth surfaced spores and grows over a temperature range of 20-37 °C, at pH 7-11 and in the presence of 3% (w/v) sodium chloride. The cell wall amino acid is LL-diaminopimelic acid and the whole cell sugars are glucose and ribose. The polar lipids profile consists of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylinositol, an unidentified aminophospholipid, two unidentified phospholipids, an unidentified glycophospholipid and eight unidentified glycolipids; iso-C16:0, iso-C16:1 G, anteiso-C17:0 and anteiso-C17:1 ω9c were identified as the predominant cellular fatty acids (> 10%). Based on morphological and chemotaxonomic characteristics, and phylogenetic analyses, the strain is considered to represent a novel species in the genus Streptomyces, for which the name Streptomyces sediminis sp. nov. is proposed with the type strain MKSP12T (= DSM 100692T = KCTC 39613T).
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Affiliation(s)
- Hilal Ay
- Department of Molecular Biology and Genetics, Faculty of Science and Arts, Ondokuz Mayis University, Samsun, Turkey.
| | - Imen Nouioui
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building 2, Newcastle upon Tyne, NE1 7RU, UK
| | | | - Hans-Peter Klenk
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building 2, Newcastle upon Tyne, NE1 7RU, UK
| | - Kamil Isik
- Department of Biology, Faculty of Science and Arts, Ondokuz Mayis University, Samsun, Turkey
| | - Demet Cetin
- Science Teaching Programme, Gazi Faculty of Education, Gazi University, 06500, Ankara, Turkey
| | - Nevzat Sahin
- Department of Biology, Faculty of Science and Arts, Ondokuz Mayis University, Samsun, Turkey
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281
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Linares-Otoya L, Linares-Otoya V, Armas-Mantilla L, Blanco-Olano C, Crüsemann M, Ganoza-Yupanqui ML, Campos-Florian J, König GM, Schäberle TF. Diversity and Antimicrobial Potential of Predatory Bacteria from the Peruvian Coastline. Mar Drugs 2017; 15:md15100308. [PMID: 29023396 PMCID: PMC5666416 DOI: 10.3390/md15100308] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 09/25/2017] [Accepted: 10/09/2017] [Indexed: 12/17/2022] Open
Abstract
The microbiome of three different sites at the Peruvian Pacific coast was analyzed, revealing a lower bacterial biodiversity at Isla Foca than at Paracas and Manglares, with 89 bacterial genera identified, as compared to 195 and 173 genera, respectively. Only 47 of the bacterial genera identified were common to all three sites. In order to obtain promising strains for the putative production of novel antimicrobials, predatory bacteria were isolated from these sampling sites, using two different bait organisms. Even though the proportion of predatory bacteria was only around 0.5% in the here investigated environmental microbiomes, by this approach in total 138 bacterial strains were isolated as axenic culture. 25% of strains showed antibacterial activity, thereby nine revealed activity against clinically relevant methicillin resistant Staphylococcus aureus (MRSA) and three against enterohemorrhagic Escherichia coli (EHEC) strains. Phylogeny and physiological characteristics of the active strains were investigated. First insights into the chemical basis of the antibacterial activity indicated the biosynthetic production of the known compounds ariakemicin, kocurin, naphthyridinomycin, pumilacidins, resistomycin, and surfactin. However, most compounds remained elusive until now. Hence, the obtained results implicate that the microbiome present at the various habitats at the Peruvian coastline is a promising source for heterotrophic bacterial strains showing high potential for the biotechnological production of antibiotics.
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Affiliation(s)
- Luis Linares-Otoya
- Institute for Insect Biotechnology, Justus Liebig University of Giessen, 5392 Giessen, Germany.
- Institute for Pharmaceutical Biology, University of Bonn, 3115 Bonn, Germany.
- Research Centre for Sustainable Development Uku Pacha, 13011 Uku Pacha, Peru.
| | - Virginia Linares-Otoya
- Department of Pharmacology, Faculty of Pharmacy and Biochemistry, National University of Trujillo, 13011 Trujillo, Peru.
- Research Centre for Sustainable Development Uku Pacha, 13011 Uku Pacha, Peru.
| | - Lizbeth Armas-Mantilla
- Department of Pharmacology, Faculty of Pharmacy and Biochemistry, National University of Trujillo, 13011 Trujillo, Peru.
| | - Cyntia Blanco-Olano
- Department of Pharmacology, Faculty of Pharmacy and Biochemistry, National University of Trujillo, 13011 Trujillo, Peru.
| | - Max Crüsemann
- Institute for Pharmaceutical Biology, University of Bonn, 3115 Bonn, Germany.
| | - Mayar L Ganoza-Yupanqui
- Department of Pharmacology, Faculty of Pharmacy and Biochemistry, National University of Trujillo, 13011 Trujillo, Peru.
| | - Julio Campos-Florian
- Department of Pharmacology, Faculty of Pharmacy and Biochemistry, National University of Trujillo, 13011 Trujillo, Peru.
| | - Gabriele M König
- Institute for Pharmaceutical Biology, University of Bonn, 3115 Bonn, Germany.
- German Centre for Infection Research (DZIF) Partner Site Bonn/Cologne, Bonn 53115, Germany.
| | - Till F Schäberle
- Institute for Insect Biotechnology, Justus Liebig University of Giessen, 5392 Giessen, Germany.
- Institute for Pharmaceutical Biology, University of Bonn, 3115 Bonn, Germany.
- German Centre for Infection Research (DZIF) Partner Site Bonn/Cologne, Bonn 53115, Germany.
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282
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Wu X, Jin L, Zhang H, Tong R, Ma M, Chen Y. Identification of truncated form of NosP as a transcription factor to regulate the biosynthesis of nosiheptide. FASEB J 2017; 32:453-465. [PMID: 28935819 DOI: 10.1096/fj.201700556r] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 09/05/2017] [Indexed: 01/05/2023]
Abstract
Nosiheptide (NOS), a typical member of the thiopeptides, possesses strong activities against multidrug-resistant, gram-positive bacterial pathogens. Similar to other thiopeptides, the biosynthetic pathway of NOS belongs to a ribosomally synthesized and posttranslationally modified peptide system. Bioinformatics analysis of the NOS gene cluster suggests that nosP gene encodes a homologous protein of the Streptomyces antibiotic regulatory protein (SARP) family. In the present study, the actual initiation codon of nosP was identified by comparison of potential initiation codons GUG and AUG. In contrast to previous predictions of starting with GUG, AUG, corresponding to methionine residue as the 53rd residue in the original sequence, is actually the initiation codon of nosP, indicating that a truncated form of NosP (NosP53-323) is a functional protein. For better understanding of the transcriptional regulation for NOS biosynthesis, the binding region was subsequently investigated with NosP53-323, demonstrating that NosP53-323 specifically binds the bidirectional nosL-nosM promoter region. Additionally, NosP53-323 was confirmed to serve as a transcription factor to activate the transcription of all 15 structural genes in the gene cluster. The present study provides new insights into pathway-specific regulation of the biosynthesis of NOS, which would be beneficial to the investigation of the regulatory function of similar SARP proteins in the gene clusters of other thiopeptides.-Wu, X., Jin, L., Zhang, H., Tong, R., Ma, M., Chen, Y. Identification of truncated form of NosP as a transcription factor to regulate the biosynthesis of nosiheptide.
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Affiliation(s)
- Xuri Wu
- State Key Laboratory of Natural Medicines and Laboratory of Chemical Biology, China Pharmaceutical University, Nanjing, China
| | - Liang Jin
- State Key Laboratory of Natural Medicines and Laboratory of Chemical Biology, China Pharmaceutical University, Nanjing, China
| | - Hong Zhang
- State Key Laboratory of Natural Medicines and Laboratory of Chemical Biology, China Pharmaceutical University, Nanjing, China
| | - Ruinian Tong
- State Key Laboratory of Natural Medicines and Laboratory of Chemical Biology, China Pharmaceutical University, Nanjing, China
| | - Min Ma
- State Key Laboratory of Natural Medicines and Laboratory of Chemical Biology, China Pharmaceutical University, Nanjing, China
| | - Yijun Chen
- State Key Laboratory of Natural Medicines and Laboratory of Chemical Biology, China Pharmaceutical University, Nanjing, China
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283
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Obeidat M, Abu-Romman S, Odat N, Haddad M, Al-Abbadi A, Hawari A. Antimicrobial and Insecticidal Activities of n-Butanol Extracts from Some Streptomyces Isolates. ACTA ACUST UNITED AC 2017. [DOI: 10.3923/jm.2017.218.228] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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284
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Ortseifen V, Kalinowski J, Pühler A, Rückert C. The complete genome sequence of the actinobacterium Streptomyces glaucescens GLA.O (DSM 40922) carrying gene clusters for the biosynthesis of tetracenomycin C, 5`-hydroxy streptomycin, and acarbose. J Biotechnol 2017; 262:84-88. [PMID: 28917933 DOI: 10.1016/j.jbiotec.2017.09.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/12/2017] [Accepted: 09/12/2017] [Indexed: 11/30/2022]
Abstract
The secondary metabolite acarbose is used worldwide in the clinical treatment of diabetes mellitus type 2 patients. Acarbose is a - glucosidase inhibitor and supports patients to control their blood glucose as well as their serum insulin levels. The secondary metabolite is produced by strains of the class Actinobacteria, in particular from Actinoplanes sp. SE50/110, which is a progenitor of today`s production strains. Moreover, secondary metabolite clusters could also be identified in Streptomyces coelicoflavus ZG0656 as well as Streptomyces glaucescens GLA.O. In this study, the genome S. glaucescens GLA.O with focus on the acarbose biosynthesis cluster (gac-cluster) was analyzed. First, the tetracenomycin C and the 5`-hydroxy streptomycin gene clusters could be described completely. Then the gac gene region in S. glaucescens GLA.O is compared to the other known biosynthesis gene cluster. In comparison to Actinoplanes sp. SE50/110 the gac-cluster showed structural variances, like the missing homolog of the glycosyltransferase AcbD in the whole genome of S. glaucescens GLA.O. Due to the lack of the glycosyltransferase, it was of particular interest whether additional acarviose metabolites other than acarbose could be formed. For detection of acarviose metabolites biosynthesis the supernatant of S. glaucescens GLA.O grown in starch supplemented complex media was harvested at 72 and 96 hours. Although a homolog of the known glycosyltransferase is absent, the LC-MS-supported analysis revealed that a spectrum of acarviose metabolites was formed.
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Affiliation(s)
- Vera Ortseifen
- Senior Research Group Genome Research of Industrial Microorganisms, Center for Biotechnology, Bielefeld University, Universitätsstraße 27, 33615 Bielefeld, Germany; CLIB-Graduate Cluster Industrial Biotechnology, CLIB2021, Völklinger Strasse 4, 40219 Düsseldorf, Germany; Microbial Genomics and Biotechnology, Center for Biotechnology, Bielefeld University, Universitätsstraße 27, 33615 Bielefeld, Germany
| | - Jörn Kalinowski
- Technology Platform Genomics, Center for Biotechnology, Bielefeld University, Sequenz 1, 33615 Bielefeld, Germany; Microbial Genomics and Biotechnology, Center for Biotechnology, Bielefeld University, Universitätsstraße 27, 33615 Bielefeld, Germany
| | - Alfred Pühler
- Senior Research Group Genome Research of Industrial Microorganisms, Center for Biotechnology, Bielefeld University, Universitätsstraße 27, 33615 Bielefeld, Germany
| | - Christian Rückert
- Technology Platform Genomics, Center for Biotechnology, Bielefeld University, Sequenz 1, 33615 Bielefeld, Germany.
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285
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Baygar T, Ugur A. Biosynthesis of Silver Nanoparticles by Streptomyces griseorubens isolated from Soil and Their Antioxidant Activity. IET Nanobiotechnol 2017; 11:286-291. [PMID: 28476986 DOI: 10.1049/iet-nbt.2015.0127] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Microbial mediated biological synthesis of metallic nanoparticles was carried out ecofriendly in the present study. Silver nanoparticles (AgNPs) were extracellularly biosynthesised from Streptomyces griseorubens AU2 and extensively characterised by ultraviolet-visible (UV-vis) and Fourier transform infrared spectroscopy, high-resolution transmission electron microscopy, scanning electron microscopy and X-ray diffraction analysis. Elemental analysis of nanoparticles was also carried out using energy dispersive X-ray spectroscopy. The biosynthesised AgNPs showed the characteristic absorption spectra in UV-vis at 422 nm which confirmed the presence of metallic AgNPs. According to the further characterisation analysis, the biosynthesised AgNPs were found to be spherical and crystalline particles with 5-20 nm average size. Antioxidant properties of the biosynthesised AgNPs were determined by 2,2-diphenyl-1-picrylhydrazyl free radical scavenging assay and was found to increase in a dose-dependent matter. The identification of the strain was determined by molecular characterisation method using 16s rDNA sequencing. The present study is the first report on the microbial biosynthesis of AgNPs using S. griseorubens isolated from soil and provides that the active biological components found in the cell-free culture supernatant of S. griseorubens AU2 enable the synthesis of AgNPs.
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Affiliation(s)
- Tuba Baygar
- Research Laboratories Center, Mugla Sitki Kocman University, 48000 Mugla, Turkey
| | - Aysel Ugur
- Section of Medical Microbiology, Department of Basic Sciences, Faculty of Dentistry, Gazi University, 06500 Ankara, Turkey.
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286
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Baygar T, Ugur A. In vitro evaluation of antimicrobial and antibiofilm potentials of silver nanoparticles biosynthesised by Streptomyces griseorubens. IET Nanobiotechnol 2017; 11:677-681. [PMCID: PMC8676315 DOI: 10.1049/iet-nbt.2016.0199] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 01/04/2017] [Accepted: 02/17/2017] [Indexed: 12/11/2023] Open
Abstract
This study was performed to determine the antimicrobial and antibiofilm activities of silver nanoparticles (AgNPs) biosynthesised using Streptomyces griseorubens AU2 isolated from soil. The antimicrobial activity of the AgNPs was determined by agar well diffusion, disc diffusion and broth microdilution methods. Diameters of the zone of inhibition results clearly displayed that the microbially biosynthesised AgNPs have potent antimicrobial activity against Candida albicans , Bacillus subtilis , Escherichia coli , Pseudomonas aeruginosa and Staphylococcus aureus . The minimum inhibitory concentration (MIC) and minimum lethal concentration (MLC) of the nanoparticles that had been determined by broth microdilution method were found to be 20 and 50 µg/ml for C. albicans , B. subtilis and S. aureus ; 10 and 20 µg/ml for E. coli and P. aeruginosa , respectively. For determining the effect of AgNPs on biofilm formation under in vitro conditions, MIC and subMICs were studied on P. aeruginosa and S. aureus biofilms by using microplate biofilm assay. Treatment of the AgNPs resulted in a decrease in the biofilm formation of S. aureus and P. aeruginosa as 26.52 and 25.50%, respectively. As a result of this study, it can be suggested that actinobacterially synthesised AgNPs have an effective potential to be used for pharmaceutical applications against multi‐resistant microorganisms.
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Affiliation(s)
- Tuba Baygar
- Research Laboratories CenterMugla Sitki Kocman University48000MuglaTurkey
| | - Aysel Ugur
- Section of Medical MicrobiologyDepartment of Basic SciencesFaculty of DentistryGazi University06500AnkaraTurkey
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287
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Basitta P, Westrich L, Rösch M, Kulik A, Gust B, Apel AK. AGOS: A Plug-and-Play Method for the Assembly of Artificial Gene Operons into Functional Biosynthetic Gene Clusters. ACS Synth Biol 2017; 6:817-825. [PMID: 28182401 DOI: 10.1021/acssynbio.6b00319] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The generation of novel secondary metabolites by reengineering or refactoring biochemical pathways is a rewarding but also challenging goal of synthetic biology. For this, the development of tools for the reconstruction of secondary metabolite gene clusters as well as the challenge of understanding the obstacles in this process is of great interest. The artificial gene operon assembly system (AGOS) is a plug-and-play method developed as a tool to consecutively assemble artificial gene operons into a destination vector and subsequently express them under the control of a de-repressed promoter in a Streptomyces host strain. AGOS was designed as a set of entry plasmids for the construction of artificial gene operons and a SuperCos1 based destination vector, into which the constructed operons can be assembled by Red/ET-mediated recombination. To provide a proof-of-concept of this method, we disassembled the well-known novobiocin biosynthetic gene cluster into four gene operons, encoding for the different moieties of novobiocin. We then genetically reorganized these gene operons with the help of AGOS to finally obtain the complete novobiocin gene cluster again. The production of novobiocin precursors and of novobiocin could successfully be detected by LC-MS and LC-MS/MS. Furthermore, we demonstrated that the omission of terminator sequences only had a minor impact on product formation in our system.
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Affiliation(s)
- Patrick Basitta
- Pharmaceutical
Biology, Pharmaceutical Institute, University of Tübingen, Auf
der Morgenstelle 8, Tübingen, 72076, Germany
| | - Lucia Westrich
- Pharmaceutical
Biology, Pharmaceutical Institute, University of Tübingen, Auf
der Morgenstelle 8, Tübingen, 72076, Germany
| | - Manuela Rösch
- Pharmaceutical
Biology, Pharmaceutical Institute, University of Tübingen, Auf
der Morgenstelle 8, Tübingen, 72076, Germany
| | | | - Bertolt Gust
- Pharmaceutical
Biology, Pharmaceutical Institute, University of Tübingen, Auf
der Morgenstelle 8, Tübingen, 72076, Germany
| | - Alexander Kristian Apel
- Pharmaceutical
Biology, Pharmaceutical Institute, University of Tübingen, Auf
der Morgenstelle 8, Tübingen, 72076, Germany
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288
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Jacob J, Rajendran RU, Priya SH, Purushothaman J, Saraswathy Amma DKBN. Enhanced antibacterial metabolite production through the application of statistical methodologies by a Streptomyces nogalater NIIST A30 isolated from Western Ghats forest soil. PLoS One 2017; 12:e0175919. [PMID: 28437452 PMCID: PMC5402949 DOI: 10.1371/journal.pone.0175919] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 03/14/2017] [Indexed: 11/22/2022] Open
Abstract
Streptomyces strains isolated from Nelliyampathy forest soil of Western Ghats, Kerala, India were evaluated for their antibacterial efficacy against two indicator pathogenic bacteria (Escherichia coli and Staphylococcus aureus). Among 140 strains tested, sixteen recorded potent antibacterial properties and were further screened against eleven bacterial pathogens. A strain identified as Streptomyces nogalater and designated as NIIST A30 exhibited maximum inhibition against all the test pathogens. Among the eight fermentation media tested, inorganic salts starch broth recorded the best for antibacterial production. The ethyl acetate crude extract exhibited antioxidant properties with IC50 value of 30 μg/mL and had no cytotoxicity towards L6, H9c2 and RAW 264.7 cell lines up to a concentration of 50 μg/mL. Maximum metabolite production was achieved in pH 7.0 at 35°C after 7 days incubation. The significant media components for maximum metabolite production were optimized through response surface methodology employing Plackett-Burman and Box-Behnken designs. The composition of the final optimized medium was soluble starch, 14.97g; (NH4)2SO4, 2.89g; K2HPO4, 2.07g; MgSO4.7H2O, 1g; NaCl, 1g, CaCO3, 2g; FeSO4.7H2O, 1mg; MnCl2.7H2O, 1mg; and ZnSO4.7H2O, 1mg per litre of distilled water. The optimization resulted an antibacterial activity of 28±1.5mm against S. epidermidis which was in close accordance with the predicted value of 30 mm. It is also evident from the result that an increase of 86.66% antibacterial production was recorded in optimized media. The chosen method was economical, efficient and useful for future antibacterial drug discovery from a broad spectrum metabolite producer like Streptomyces nogalater NIIST A30.
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Affiliation(s)
- Jubi Jacob
- Agro- Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR),CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
| | - Reshma Uma Rajendran
- Agro- Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
| | - Syama Hari Priya
- Agro- Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
| | - Jayamurthy Purushothaman
- Agro- Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR),CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
| | - Dileep Kumar Bhaskaran Nair Saraswathy Amma
- Agro- Processing and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR),CSIR-National Institute for Interdisciplinary Science and Technology (NIIST), Thiruvananthapuram, Kerala, India
- * E-mail:
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Zothanpuia, Passari AK, Chandra P, Leo VV, Mishra VK, Kumar B, Singh BP. Production of Potent Antimicrobial Compounds from Streptomyces cyaneofuscatus Associated with Fresh Water Sediment. Front Microbiol 2017; 8:68. [PMID: 28179900 PMCID: PMC5263160 DOI: 10.3389/fmicb.2017.00068] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 01/11/2017] [Indexed: 11/27/2022] Open
Abstract
The genus Streptomyces under phylum actinobacteria has been recognized as a prolific source for the production of bioactive secondary metabolites. An actinobacterial strain designated as DST103 isolated from a wetland fresh water sediment of Tamdil Lake, Mizoram, Northeast, India was identified as Streptomyces cyaneofuscatus (KY287599) using 16SrRNA gene sequencing which shares 99.87% sequence similarity with Streptomyces cyaneofuscatus NRRL B-2570T. The strain showed broad spectrum antimicrobial activities against Gram negative bacteria (Escherichia coli MTCC 739 and Pseudomonas aeruginosa MTCC 2453), Gram positive bacteria (Micrococcus luteus NCIM 2170 and Staphylococcus aureus MTCC 96) and yeast pathogen Candida albicans MTCC 3017). The methanolic extract of the strain DST103 exhibited highest antimicrobial activity against E. coli (IC50 = 2.10 μg/mL) and minimum activity against S. aureus (IC50 = 43.63 μg/mL). Five antibiotics [trimethoprim (18 μg/g), fluconazole (6 μg/g), ketoconazole (18 μg/g), nalidixic acid (135 μg/g), and rifampicin (56 μg/g)] were detected and quantified using ultra-performance liquid chromatography (UPLC-ESI-MS/MS). Further, biosynthetic potential genes [polyketide synthases type II, non-ribosomal peptide synthetases, and aminodeoxyisochorismate synthase (phzE)] were also detected in strain DST103 which may possibly be responsible for the production of antimicrobial compounds. Additionally, gas chromatography-mass spectrometry analysis showed the presence of four volatile compounds which might be responsible for their diverse biological activity. The present study revealed the presence of bioactive compounds in strain DST103, which may be a promising resource for the discovery of novel bioactive metabolites against wide range of pathogens.
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Affiliation(s)
- Zothanpuia
- Molecular Microbiology and Systematics Laboratory, Department of Biotechnology, Mizoram University Aizawl, India
| | - Ajit K Passari
- Molecular Microbiology and Systematics Laboratory, Department of Biotechnology, Mizoram University Aizawl, India
| | - Preeti Chandra
- CSIR-Central Drug Research Institute, Sophisticated Analytical Instrument Facility Lucknow, India
| | - Vincent V Leo
- Molecular Microbiology and Systematics Laboratory, Department of Biotechnology, Mizoram University Aizawl, India
| | - Vineet K Mishra
- Molecular Microbiology and Systematics Laboratory, Department of Biotechnology, Mizoram University Aizawl, India
| | - Brijesh Kumar
- CSIR-Central Drug Research Institute, Sophisticated Analytical Instrument Facility Lucknow, India
| | - Bhim P Singh
- Molecular Microbiology and Systematics Laboratory, Department of Biotechnology, Mizoram University Aizawl, India
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290
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Law JWF, Ser HL, Khan TM, Chuah LH, Pusparajah P, Chan KG, Goh BH, Lee LH. The Potential of Streptomyces as Biocontrol Agents against the Rice Blast Fungus, Magnaporthe oryzae ( Pyricularia oryzae). Front Microbiol 2017; 8:3. [PMID: 28144236 PMCID: PMC5239798 DOI: 10.3389/fmicb.2017.00003] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 01/03/2017] [Indexed: 11/13/2022] Open
Abstract
Rice is a staple food source for more than three billion people worldwide. However, rice is vulnerable to diseases, the most destructive among them being rice blast, which is caused by the fungus Magnaporthe oryzae (anamorph Pyricularia oryzae). This fungus attacks rice plants at all stages of development, causing annual losses of approximately 10-30% in various rice producing regions. Synthetic fungicides are often able to effectively control plant diseases, but some fungicides result in serious environmental and health problems. Therefore, there is growing interest in discovering and developing new, improved fungicides based on natural products as well as introducing alternative measures such as biocontrol agents to manage plant diseases. Streptomyces bacteria appear to be promising biocontrol agents against a wide range of phytopathogenic fungi, which is not surprising given their ability to produce various bioactive compounds. This review provides insight into the biocontrol potential of Streptomyces against the rice blast fungus, M. oryzae. The ability of various Streptomyces spp. to act as biocontrol agents of rice blast disease has been studied by researchers under both laboratory and greenhouse/growth chamber conditions. Laboratory studies have shown that Streptomyces exhibit inhibitory activity against M. oryzae. In greenhouse studies, infected rice seedlings treated with Streptomyces resulted in up to 88.3% disease reduction of rice blast. Studies clearly show that Streptomyces spp. have the potential to be used as highly effective biocontrol agents against rice blast disease; however, the efficacy of any biocontrol agent may be affected by several factors including environmental conditions and methods of application. In order to fully exploit their potential, further studies on the isolation, formulation and application methods of Streptomyces along with field experiments are required to establish them as effective biocontrol agents.
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Affiliation(s)
- Jodi Woan-Fei Law
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia Bandar Sunway, Malaysia
| | - Hooi-Leng Ser
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia Bandar Sunway, Malaysia
| | - Tahir M Khan
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University MalaysiaBandar Sunway, Malaysia; Department of Pharmacy, Absyn University PeshawarPeshawar, Pakistan
| | - Lay-Hong Chuah
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University Malaysia Bandar Sunway, Malaysia
| | - Priyia Pusparajah
- Biomedical Research Laboratory, Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia Bandar Sunway, Malaysia
| | - Kok-Gan Chan
- Division of Genetics and Molecular Biology, Faculty of Science, Institute of Biological Sciences, University of Malaya Kuala Lumpur, Malaysia
| | - Bey-Hing Goh
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University MalaysiaBandar Sunway, Malaysia; Center of Health Outcomes Research and Therapeutic Safety, School of Pharmaceutical Sciences, University of PhayaoPhayao, Thailand
| | - Learn-Han Lee
- Novel Bacteria and Drug Discovery Research Group, School of Pharmacy, Monash University MalaysiaBandar Sunway, Malaysia; Center of Health Outcomes Research and Therapeutic Safety, School of Pharmaceutical Sciences, University of PhayaoPhayao, Thailand
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291
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292
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Arango RA, Carlson CM, Currie CR, McDonald BR, Book AJ, Green F, Lebow NK, Raffa KF. Antimicrobial Activity of Actinobacteria Isolated From the Guts of Subterranean Termites. ENVIRONMENTAL ENTOMOLOGY 2016; 45:1415-1423. [PMID: 28028088 PMCID: PMC5225880 DOI: 10.1093/ee/nvw126] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 08/24/2016] [Indexed: 05/15/2023]
Abstract
Subterranean termites need to minimize potentially pathogenic and competitive fungi in their environment in order to maintain colony health. We examined the ability of Actinobacteria isolated from termite guts in suppressing microorganisms commonly encountered in a subterranean environment. Guts from two subterranean termite species, Reticulitermes flavipes (Kollar) and Reticulitermes tibialis Banks, were extracted and plated on selective chitin media. A total of 38 Actinobacteria isolates were selected for in vitro growth inhibition assays. Target microbes included three strains of Serratia marcescens Bizio, two mold fungi (Trichoderma sp. and Metarhizium sp.), a yeast fungus (Candida albicans (C.P. Robin) Berkhout), and four basidiomycete fungi (Gloeophyllum trabeum (Persoon) Murrill, Tyromyces palustris (Berkeley & M.A. Curtis) Murrill, Irpex lacteus (Fries) Fries, and Trametes versicolor (L.) Lloyd). Results showed both broad and narrow ranges of antimicrobial activity against the mold fungi, yeast fungus, and S. marcescens isolates by the Actinobacteria selected. This suggests that termite gut-associated Actinobacteria produce secondary antimicrobial compounds that may be important for pathogen inhibition in termites. Basidiomycete fungi were strongly inhibited by the selected Actinobacteria isolates, with G. trabeum and T. versicolor being most inhibited, followed by I. lacteus and T. palustris The degree of inhibition was correlated with shifts in pH caused by the Actinobacteria. Nearly all Actinobacteria isolates raised pH of the growth medium to basic levels (i.e. pH ∼8.0-9.5). We summarize antimicrobial activity of these termite gut-associated Actinobacteria and examine the implications of these pH shifts.
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Affiliation(s)
- R A Arango
- USDA Forest Products Laboratory, One Gifford Pinchot Dr., Madison, WI 53726 (; )
- Department of Entomology, University of Wisconsin-Madison, 1630 Linden Dr., Madison, WI 53706
| | - C M Carlson
- Department of Bacteriology, University of Wisconsin-Madison, 1550 Linden Dr., Madison, WI 53706 (; ; ; )
| | - C R Currie
- Department of Bacteriology, University of Wisconsin-Madison, 1550 Linden Dr., Madison, WI 53706 (; ; ; )
| | - B R McDonald
- Department of Bacteriology, University of Wisconsin-Madison, 1550 Linden Dr., Madison, WI 53706 (; ; ; )
| | - A J Book
- Department of Bacteriology, University of Wisconsin-Madison, 1550 Linden Dr., Madison, WI 53706 (; ; ; )
| | - F Green
- USDA Forest Products Laboratory, One Gifford Pinchot Dr., Madison, WI 53726 (; )
| | - N K Lebow
- Department of Food Science, Washington State University, 100 Dairy Rd., Pullman, WA 99164
| | - K F Raffa
- Department of Entomology, University of Wisconsin-Madison, 1630 Linden Dr., Madison, WI 53706
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293
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Kunova A, Bonaldi M, Saracchi M, Pizzatti C, Chen X, Cortesi P. Selection of Streptomyces against soil borne fungal pathogens by a standardized dual culture assay and evaluation of their effects on seed germination and plant growth. BMC Microbiol 2016; 16:272. [PMID: 27829359 PMCID: PMC5103511 DOI: 10.1186/s12866-016-0886-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Accepted: 11/03/2016] [Indexed: 01/27/2023] Open
Abstract
Background In the search for new natural resources for crop protection, streptomycetes are gaining interest in agriculture as plant growth promoting bacteria and/or biological control agents. Because of their peculiar life cycle, in which the production of secondary metabolites is synchronized with the development of aerial hyphae and sporulation, the commonly used methods to screen for bacterial antagonists need to be adapted. Results The dual culture assay was standardized in terms of inoculation timing of Streptomyces antagonist and pathogen, and growth rate of different fungal pathogens. In case of fast-growing fungi, inoculation of the antagonist 2 or 3 days prior to the pathogen resulted in significantly stronger inhibition of mycelium growth. One hundred and thirty Streptomyces strains were evaluated against six destructive soil borne pathogens. The activity of strains varied from broad-spectrum to highly specific inhibition of individual pathogens. All strains inhibited at least one tested pathogen. Three strains, which combined the largest broad-spectrum with the highest inhibition activity, were selected for further characterization with four vegetable species. All of them were able to colonize seed surface of all tested vegetable crops. They mostly improved radicle and hypocotyl growth in vitro, although no statistically significant enhancement of biomass weight was observed in vivo. Occasionally, transient negative effects on germination and plant growth were observed. Conclusions The adapted dual culture assay allowed us to compare the inhibition of individual Streptomyces strains against six fungal soil borne pathogens. The best selected strains were able to colonize the four vegetable crops and have a potential to be developed into biocontrol products. Although they occasionally negatively influenced plant growth, these effects did not persist during the further development. Additional in vivo studies are needed to confirm their potential as biological control or plant growth promoting agents. Electronic supplementary material The online version of this article (doi:10.1186/s12866-016-0886-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Andrea Kunova
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, via Giovanni Celoria, 2, 20133, Milan, Italy.
| | - Maria Bonaldi
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, via Giovanni Celoria, 2, 20133, Milan, Italy
| | - Marco Saracchi
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, via Giovanni Celoria, 2, 20133, Milan, Italy
| | - Cristina Pizzatti
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, via Giovanni Celoria, 2, 20133, Milan, Italy
| | - Xiaoyulong Chen
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, via Giovanni Celoria, 2, 20133, Milan, Italy
| | - Paolo Cortesi
- Department of Food, Environmental and Nutritional Sciences (DeFENS), Università degli Studi di Milano, via Giovanni Celoria, 2, 20133, Milan, Italy
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294
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Chawawisit K, Bhoopong P, Phupong W, Lertcanawa M. Combination Effect Between 2, 4-Di-tert-butylphenol Produced by Streptomyces sp. KB1 TISTR 2304 and Vancomycin Against Methicillin-resistant Staphylococcus aureus (MRSA). INT J PHARMACOL 2016. [DOI: 10.3923/ijp.2016.838.844] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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295
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Das G, Patra JK, Baek KH. Antibacterial Properties of Endophytic Bacteria Isolated from a Fern Species Equisetum arvense L. Against Foodborne Pathogenic Bacteria Staphylococcus aureus and Escherichia coli O157:H7. Foodborne Pathog Dis 2016; 14:50-58. [PMID: 27754712 DOI: 10.1089/fpd.2016.2192] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Endophytic bacteria (EB) are a rich source of secondary metabolites with medicinal importance. In this study, EB were isolated from the bottle brush herb Equisetum arvense and identified based on 16S rRNA sequencing. Evaluation of its antibacterial potential was conducted using two common foodborne pathogenic bacteria, Staphylococcus aureus ATCC 12600 and Escherichia coli O157:H7 ATCC 43890. Out of 103 identified EB, three species, Streptomyces albolongus, Dermacoccus sp., and Mycobacterium sp., showed significant antibacterial activity against S. aureus with inhibition zones of 45.34 ± 0.15, 43.28 ± 0.19, and 22.98 ± 0.18 mm, respectively, whereas only two species, Streptomyces griseoaurantiacus (EAL196) and Paenibacillus sp. (EAS116), showed moderate antibacterial activity against E. coli O157:H7 with inhibition zones of 9.41 ± 0.29 and 10.44 ± 0.31 mm, respectively. Furthermore, ethyl acetate extract of S. albolongus, Mycobacterium sp., and Dermacoccus sp. showed antibacterial activity against S. aureus, with inhibition zones of 23.43 ± 0.21, 21.18 ± 0.22, and 19.72 ± 0.10 mm, respectively. The methanol extract of Dermacoccus sp. and Paenibacillus sp. showed antibacterial activity against S. aureus and E. coli O157:H7, with inhibition zones of 11.30 ± 0.17 and 10.01 ± 0.21 mm, respectively. Scanning electron microscopy indicated swollen and lysed cell membranes of pathogens treated with ethyl acetate extract. A possible reason might be, likely due to EB metabolites penetrating the bacterial cell membranes and affecting various metabolic functions resulting in lysis. To the best of our knowledge, this is the first study to report that EB from E. arvense can be used as a source of natural antibacterial compounds against foodborne pathogenic bacteria.
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Affiliation(s)
- Gitishree Das
- 1 Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul , Ilsandong-gu, Republic of Korea
| | - Jayanta Kumar Patra
- 1 Research Institute of Biotechnology and Medical Converged Science, Dongguk University-Seoul , Ilsandong-gu, Republic of Korea
| | - Kwang-Hyun Baek
- 2 Department of Biotechnology, Yeungnam University , Gyeongsan, Republic of Korea
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296
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Tangerina MMP, Correa H, Haltli B, Vilegas W, Kerr RG. Bioprospecting from cultivable bacterial communities of marine sediment and invertebrates from the underexplored Ubatuba region of Brazil. Arch Microbiol 2016; 199:155-169. [PMID: 27644133 DOI: 10.1007/s00203-016-1290-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 07/28/2016] [Accepted: 09/09/2016] [Indexed: 11/26/2022]
Abstract
Shrimp fisheries along the Brazilian coast have significant environmental impact due to high by-catch rates (21 kg per kilogram of shrimp). Typically discarded, by-catch contains many invertebrates that may host a great variety of bacterial genera, some of which may produce bioactive natural products with biotechnological applications. Therefore, to utilize by-catch that is usually discarded we explored the biotechnological potential of culturable bacteria of two abundant by-catch invertebrate species, the snail Olivancillaria urceus and the sea star Luidia senegalensis. Sediment from the collection area was also investigated. Utilizing multiple isolation approaches, 134 isolates were obtained from the invertebrates and sediment. Small-subunit rRNA (16S) gene sequencing revealed that the isolates belonged to Proteobacteria, Firmicutes and Actinobacteria phyla and were distributed among 28 genera. Several genera known for their capacity to produce bioactive natural products (Micromonospora, Streptomyces, Serinicoccus and Verrucosispora) were retrieved from the invertebrate samples. To query the bacterial isolates for their ability to produce bioactive metabolites, all strains were fermented and fermentation extracts profiled by UP LC-HRMS and tested for antimicrobial activity. Four strains exhibited antimicrobial activity against methicillin-resistant Staphylococcus aureus (MRSA) and Staphylococcus warneri.
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Affiliation(s)
- Marcelo M P Tangerina
- Biosciences Institute, São Paulo State University - UNESP, Coastal Campus, Praça Infante Dom Henrique s/n, São Vicente, SP, P.O. Box 73601, 11380-972, Brazil
- Chemistry Institute, São Paulo State University - UNESP, Araraquara Campus. Prof. Francisco Degni, 55, Araraquara, SP, 14800-060, Brazil
| | - Hebelin Correa
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada
| | - Brad Haltli
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada
- Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada
| | - Wagner Vilegas
- Biosciences Institute, São Paulo State University - UNESP, Coastal Campus, Praça Infante Dom Henrique s/n, São Vicente, SP, P.O. Box 73601, 11380-972, Brazil
| | - Russell G Kerr
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
- Department of Biomedical Sciences, Atlantic Veterinary College, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
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297
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Zhang MM, Wang Y, Ang EL, Zhao H. Engineering microbial hosts for production of bacterial natural products. Nat Prod Rep 2016; 33:963-87. [PMID: 27072804 PMCID: PMC4963277 DOI: 10.1039/c6np00017g] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Covering up to end 2015Microbial fermentation provides an attractive alternative to chemical synthesis for the production of structurally complex natural products. In most cases, however, production titers are low and need to be improved for compound characterization and/or commercial production. Owing to advances in functional genomics and genetic engineering technologies, microbial hosts can be engineered to overproduce a desired natural product, greatly accelerating the traditionally time-consuming strain improvement process. This review covers recent developments and challenges in the engineering of native and heterologous microbial hosts for the production of bacterial natural products, focusing on the genetic tools and strategies for strain improvement. Special emphasis is placed on bioactive secondary metabolites from actinomycetes. The considerations for the choice of host systems will also be discussed in this review.
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Affiliation(s)
- Mingzi M Zhang
- Metabolic Engineering Research Laboratory, Science and Engineering Institutes, Agency for Science, Technology and Research, Singapore
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298
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Iqbal HA, Low-Beinart L, Obiajulu JU, Brady SF. Natural Product Discovery through Improved Functional Metagenomics in Streptomyces. J Am Chem Soc 2016; 138:9341-4. [PMID: 27447056 PMCID: PMC5469685 DOI: 10.1021/jacs.6b02921] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Because the majority of environmental bacteria are not easily culturable, access to many bacterially encoded secondary metabolites will be dependent on the development of improved functional metagenomic screening methods. In this study, we examined a collection of diverse Streptomyces species for the best innate ability to heterologously express biosynthetic gene clusters. We then optimized methods for constructing high quality metagenomic cosmid libraries in the best Streptomyces host. An initial screen of a 1.5 million-membered metagenomic library constructed in Streptomyces albus, the species that exhibited the highest propensity for heterologous expression of gene clusters, led to the identification of the novel natural product metatricycloene (1). Metatricycloene is a tricyclic polyene encoded by a reductive, iterative polyketide-like gene cluster. Related gene clusters found in sequenced genomes appear to encode a largely unexplored collection of structurally diverse, polyene-based metabolites.
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Affiliation(s)
- Hala A. Iqbal
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
| | - Lila Low-Beinart
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
| | - Joseph U. Obiajulu
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
| | - Sean F. Brady
- Laboratory of Genetically Encoded Small Molecules, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
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299
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Isolation and characterization of marine-derived actinomycetes with cytotoxic activity from the Red Sea coast. Asian Pac J Trop Biomed 2016. [DOI: 10.1016/j.apjtb.2016.06.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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300
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Zhu L, Ni C, Dong B, Zhang Y, Shi Y, Niu H, Li C. A novel hedgehog inhibitor iG2 suppresses tumorigenesis by impairing self-renewal in human bladder cancer. Cancer Med 2016; 5:2579-86. [PMID: 27465044 PMCID: PMC5055183 DOI: 10.1002/cam4.802] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 05/08/2016] [Accepted: 05/22/2016] [Indexed: 01/07/2023] Open
Abstract
Tumor recurrence is still a major challenge for clinical treatment of bladder cancer. Cumulative evidences indicate cancer stem cells (CSCs) contribute to drug resistance and leave a putative source for disease relapse. Identifying novel agents targeting CSCs may represent a new paradigm in the therapy of bladder cancer. Here, we separated a novel hedgehog (Hh) inhibitor, iG2, from streptomyces roseofulvus, which dramatically blocked the activation of Gli2 in bladder cancer cells. The iG2 strongly repressed the growth of cancer cells rather than the peri‐tumor stroma cells. Attenuated proliferation and enhanced apoptosis of tumor cells were observed upon iG2 stimulation. Furthermore, iG2 reduced the self‐renewal ability of bladder CSCs as well as the tumor formation. Collectively, iG2 is potentially used as a novel therapeutic agent for bladder cancer by targeting self‐renewal through inhibiting Hh pathway.
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Affiliation(s)
- Lihong Zhu
- Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Chen Ni
- Medical Research Center, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Baijun Dong
- Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Yong Zhang
- Department of Urology, the Affiliated Hospital of Qingdao University, Qingdao, 266003, China
| | - Yuefeng Shi
- Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Haitao Niu
- Department of Urology, the Affiliated Hospital of Qingdao University, Qingdao, 266003, China.
| | - Chong Li
- Laboratory Animal Center, CAS Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101, China.
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