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Kachor A, Tistechok S, Rebets Y, Fedorenko V, Gromyko O. Bacterial community and culturable actinomycetes of Phyllostachys viridiglaucescens rhizosphere. Antonie Van Leeuwenhoek 2024; 117:9. [PMID: 38170239 DOI: 10.1007/s10482-023-01906-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 11/02/2023] [Indexed: 01/05/2024]
Abstract
During the course of development plants form tight interactions with microorganisms inhabiting their root zone. In turn, rhizosphere bacteria, in particular members of the phylum Actinomycetota, positively influence the host plant by increasing access to essential nutrients and controlling the pathogenic microorganism's population. Herein, we report the characterisation of the rhizosphere associated actinobacteria community of Phyllostachys viridiglaucescens growing in the Nikitsky Botanical Garden (Crimean Peninsula, Ukraine). The overall composition of the bacterial community was elucidated by 16S rRNA gene amplicon sequencing followed by isolation of culturable microorganisms with the focus on actinomycetes. The metagenomic approach revealed that the representatives of phylum Actinomycetota (57.1%), Pseudomonadota (20.0%), and Acidobacteriota (12.2%) were dominating in the studied microbiome with Ilumatobacter (phylum Actinomycetota) (13.1%) being the dominant genus. Furthermore, a total of 159 actinomycete isolates, belonging to eight genera of Streptomyces, Micromonospora, Nonomuraea, Arthrobacter, Actinomadura, Kribbella, Cellulosimicrobium, and Mumia, were recovered from P. viridiglaucescens rhizosphere. The isolated species were tested for antimicrobial activity. 64% of isolates were active against at least one bacterial test-culture and 7.5% against fungal test culture. In overall, the rhizosphere bacterial communities act as a great source of actinobacterial diversity with the high potential for production of new bioactive compounds.
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Affiliation(s)
- Anna Kachor
- Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv, 79005, Ukraine
- Explogen LLC, Lviv, 79005, Ukraine
| | - Stepan Tistechok
- Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv, 79005, Ukraine
| | | | - Victor Fedorenko
- Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv, 79005, Ukraine
| | - Oleksandr Gromyko
- Department of Genetics and Biotechnology, Ivan Franko National University of Lviv, Lviv, 79005, Ukraine.
- Microbial Culture Collection of Antibiotic Producers, Ivan Franko National University of Lviv, Lviv, 79005, Ukraine.
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Becerril-Espinosa A, Mateos-Salmón C, Burgos A, Rodríguez-Zaragoza FA, Meza-Canales ID, Juarez-Carrillo E, Rios-Jara E, Ocampo-Alvarez H. Dry Stamping Coral Powder: An Effective Method for Isolating Coral Symbiotic Actinobacteria. Microorganisms 2023; 11:2951. [PMID: 38138095 PMCID: PMC10745815 DOI: 10.3390/microorganisms11122951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/05/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023] Open
Abstract
Actinobacteria are important sources of antibiotics and have been found repeatedly in coral core microbiomes, suggesting this bacterial group plays important functional roles tied to coral survival. However, to unravel coral-actinobacteria ecological interactions and discover new antibiotics, the complex challenges that arise when isolating symbiotic actinobacteria must be overcome. Moreover, by isolating unknown actinobacteria from corals, novel biotechnological applications may be discovered. In this study, we compared actinobacteria recovery from coral samples between two widely known methods for isolating actinobacteria: dry stamping and heat shock. We found that dry stamping was at least three times better than heat shock. The assembly of isolated strains by dry stamping was unique for each species and consistent across same-species samples, highlighting that dry stamping can be reliably used to characterize coral actinobacteria communities. By analyzing the genomes of the closest related type strains, we were able to identify several functions commonly found among symbiotic organisms, such as transport and quorum sensing. This study provides a detailed methodology for isolating coral actinobacteria for ecological and biotechnological purposes.
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Affiliation(s)
- Amayaly Becerril-Espinosa
- Consejo Nacional de Humanidades, Ciencias y Tecnologías (CONAHCYT), Mexico City 03940, Mexico; (A.B.-E.); (A.B.)
- Departamento de Ecología, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan 45200, Mexico (F.A.R.-Z.); (E.J.-C.); (E.R.-J.)
| | - Carolina Mateos-Salmón
- Departamento de Ecología, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan 45200, Mexico (F.A.R.-Z.); (E.J.-C.); (E.R.-J.)
| | - Asdrubal Burgos
- Consejo Nacional de Humanidades, Ciencias y Tecnologías (CONAHCYT), Mexico City 03940, Mexico; (A.B.-E.); (A.B.)
- Departamento de Botánica y Zoología, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan 45200, Mexico;
| | - Fabián A. Rodríguez-Zaragoza
- Departamento de Ecología, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan 45200, Mexico (F.A.R.-Z.); (E.J.-C.); (E.R.-J.)
| | - Iván D. Meza-Canales
- Departamento de Botánica y Zoología, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan 45200, Mexico;
| | - Eduardo Juarez-Carrillo
- Departamento de Ecología, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan 45200, Mexico (F.A.R.-Z.); (E.J.-C.); (E.R.-J.)
| | - Eduardo Rios-Jara
- Departamento de Ecología, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan 45200, Mexico (F.A.R.-Z.); (E.J.-C.); (E.R.-J.)
| | - Héctor Ocampo-Alvarez
- Departamento de Ecología, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan 45200, Mexico (F.A.R.-Z.); (E.J.-C.); (E.R.-J.)
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Mo P, Zhou F, Luo X, Zhang Y, Deng A, Xie P, Wang Y. Streptomyces argyrophyllae sp. nov., isolated from the rhizosphere soil of Cathaya argyrophylla. Arch Microbiol 2023; 205:329. [PMID: 37682340 DOI: 10.1007/s00203-023-03668-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 08/28/2023] [Indexed: 09/09/2023]
Abstract
Strain Jing01T, a novel actinomycete from rhizosphere soil of Cathaya argyrophylla, was identified using a polyphasic approach. 16S rRNA gene sequence analysis of strain Jing01T revealed that it was a member of the genus Streptomyces and shared 99.03%, 99.03%, 98.96%, 98.89%, 98.83%, 98.82%, 98.76%, 98.74%, 98.73%, 98.69% and 98.68% similarities to Streptomyces rochei NRRL B-2410T, Streptomyces naganishii NBRC 12892T, Streptomyces rubradiris JCM 4955T, Streptomyces anandii NRRL B-3590T, Streptomyces aurantiogriseus NBRC 12842T, Streptomyces mutabilis NBRC 12800T, Streptomyces rameus LMG 20326T, Streptomyces djakartensis NBRC 15409T, Streptomyces bangladeshensis JCM 14924T, Streptomyces andamanensis KCTC 29502T and Streptomyces tuirus NBRC 15617T, respectively. In phylogenetic trees constructed based on 16S rRNA gene sequences, strain Jing01T generated a separate branch at the middle of the clade, suggesting it could be a potential novel species. In phylogenomic tree, strain Jing01T was related to S. rubradiris JCM 4955T. In phylogenetic trees based on the gene sequences of atpD, gyrB, recA, rpoB and trpB, strain Jing01T was related to S. bangladeshensis JCM 14924T and S. rubradiris JCM 4955T. Whereas, the multilocus sequence analysis distance, average nucleotide identity and DNA-DNA hybridization values between them were much less than the species-level thresholds. This conclusion was further supported by phenotypic and chemotaxonomic analysis. Consequently, strain Jing01T represents a new Streptomyces species, for which the proposed name is Streptomyces argyrophyllae sp. nov. The type strain is Jing01T (= MCCC 1K05707T = JCM 35923T).
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Affiliation(s)
- Ping Mo
- Key Laboratory of Agricultural Products Processing and Food Safety in Hunan Higher Education, Science and Technology Innovation Team for Efficient Agricultural Production and Deep Processing at General University in Hunan Province, Hunan Provincial Key Laboratory for Health Aquaculture and Product Processing in Dongting Lake Area, Hunan Provincial Key Laboratory for Molecular Immunity Technology of Aquatic Animal Diseases, State Key Laboratory of Developmental Biology of Freshwater Fish, College of life and environmental sciences, Hunan University of Arts and Science, Changde, 415000, Hunan, China
| | - Fumin Zhou
- Key Laboratory of Agricultural Products Processing and Food Safety in Hunan Higher Education, Science and Technology Innovation Team for Efficient Agricultural Production and Deep Processing at General University in Hunan Province, Hunan Provincial Key Laboratory for Health Aquaculture and Product Processing in Dongting Lake Area, Hunan Provincial Key Laboratory for Molecular Immunity Technology of Aquatic Animal Diseases, State Key Laboratory of Developmental Biology of Freshwater Fish, College of life and environmental sciences, Hunan University of Arts and Science, Changde, 415000, Hunan, China
| | - Xiyu Luo
- Key Laboratory of Agricultural Products Processing and Food Safety in Hunan Higher Education, Science and Technology Innovation Team for Efficient Agricultural Production and Deep Processing at General University in Hunan Province, Hunan Provincial Key Laboratory for Health Aquaculture and Product Processing in Dongting Lake Area, Hunan Provincial Key Laboratory for Molecular Immunity Technology of Aquatic Animal Diseases, State Key Laboratory of Developmental Biology of Freshwater Fish, College of life and environmental sciences, Hunan University of Arts and Science, Changde, 415000, Hunan, China
| | - Ying Zhang
- Key Laboratory of Agricultural Products Processing and Food Safety in Hunan Higher Education, Science and Technology Innovation Team for Efficient Agricultural Production and Deep Processing at General University in Hunan Province, Hunan Provincial Key Laboratory for Health Aquaculture and Product Processing in Dongting Lake Area, Hunan Provincial Key Laboratory for Molecular Immunity Technology of Aquatic Animal Diseases, State Key Laboratory of Developmental Biology of Freshwater Fish, College of life and environmental sciences, Hunan University of Arts and Science, Changde, 415000, Hunan, China
| | - Aihua Deng
- Key Laboratory of Agricultural Products Processing and Food Safety in Hunan Higher Education, Science and Technology Innovation Team for Efficient Agricultural Production and Deep Processing at General University in Hunan Province, Hunan Provincial Key Laboratory for Health Aquaculture and Product Processing in Dongting Lake Area, Hunan Provincial Key Laboratory for Molecular Immunity Technology of Aquatic Animal Diseases, State Key Laboratory of Developmental Biology of Freshwater Fish, College of life and environmental sciences, Hunan University of Arts and Science, Changde, 415000, Hunan, China
| | - Peng Xie
- Key Laboratory of Agricultural Products Processing and Food Safety in Hunan Higher Education, Science and Technology Innovation Team for Efficient Agricultural Production and Deep Processing at General University in Hunan Province, Hunan Provincial Key Laboratory for Health Aquaculture and Product Processing in Dongting Lake Area, Hunan Provincial Key Laboratory for Molecular Immunity Technology of Aquatic Animal Diseases, State Key Laboratory of Developmental Biology of Freshwater Fish, College of life and environmental sciences, Hunan University of Arts and Science, Changde, 415000, Hunan, China.
| | - Yun Wang
- Key Laboratory of Agricultural Products Processing and Food Safety in Hunan Higher Education, Science and Technology Innovation Team for Efficient Agricultural Production and Deep Processing at General University in Hunan Province, Hunan Provincial Key Laboratory for Health Aquaculture and Product Processing in Dongting Lake Area, Hunan Provincial Key Laboratory for Molecular Immunity Technology of Aquatic Animal Diseases, State Key Laboratory of Developmental Biology of Freshwater Fish, College of life and environmental sciences, Hunan University of Arts and Science, Changde, 415000, Hunan, China
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Li C, Wang Y, Liu D, Wong CC, Coker OO, Zhang X, Liu C, Zhou Y, Liu Y, Kang W, To KF, Sung JJY, Yu J. Squalene epoxidase drives cancer cell proliferation and promotes gut dysbiosis to accelerate colorectal carcinogenesis. Gut 2022; 71:2253-2265. [PMID: 35232776 PMCID: PMC9554078 DOI: 10.1136/gutjnl-2021-325851] [Citation(s) in RCA: 55] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 02/15/2022] [Indexed: 01/07/2023]
Abstract
OBJECTIVE Aberrant lipid metabolism is a hallmark of colorectal cancer (CRC). Squalene epoxidase (SQLE), a rate-limiting enzyme in cholesterol biosynthesis, is upregulated in CRC. Here, we aim to determine oncogenic function of SQLE and its interplay with gut microbiota in promoting colorectal tumourigenesis. DESIGN Paired adjacent normal tissues and CRC from two cohorts were analysed (n=202). Colon-specific Sqle transgenic (Sqle tg) mice were generated by crossing Rosa26-lsl-Sqle mice to Cdx2-Cre mice. Stools were collected for metagenomic and metabolomic analyses. RESULTS SQLE messenger RNA and protein expression was upregulated in CRC (p<0.01) and predict poor survival of patients with CRC. SQLE promoted CRC cell proliferation by inducing cell cycle progression and suppressing apoptosis. In azoxymethane-induced CRC model, Sqle tg mice showed increased tumourigenesis compared with wild-type mice (p<0.01). Integrative metagenomic and metabolomic analyses unveiled gut dysbiosis in Sqle tg mice with enriched pathogenic bacteria, which was correlated to increased secondary bile acids. Consistent with detrimental effect of secondary bile acids, gut barrier function was impaired in Sqle tg mice, with reduced tight junction proteins Jam-c and occludin. Transplantation of Sqle tg mice stool to germ-free mice impaired gut barrier function and stimulated cell proliferation compared with control mice stool. Finally, we demonstrated that terbinafine, a SQLE inhibitor, could be repurposed for CRC by synergising with oxaliplatin and 5-fluorouracil to inhibit CRC growth. CONCLUSION This study demonstrates that SQLE mediates oncogenesis via cell intrinsic effects and modulation of gut microbiota-metabolite axis. SQLE represents a therapeutic target and prognostic marker in CRC.
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Affiliation(s)
- Chuangen Li
- Institute of Digestive Disease and The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yong Wang
- Department of Laboratory Animal Science, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Dabin Liu
- Institute of Digestive Disease and The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Chi Chun Wong
- Institute of Digestive Disease and The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Olabisi Oluwabukola Coker
- Institute of Digestive Disease and The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Xiang Zhang
- Institute of Digestive Disease and The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Changan Liu
- Institute of Digestive Disease and The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yunfei Zhou
- Institute of Digestive Disease and The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Yali Liu
- Institute of Digestive Disease and The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Wei Kang
- Department of Anatomical and Cellular Pathology, State Key Laboratory of Translational Oncology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ka Fai To
- Department of Anatomical and Cellular Pathology, State Key Laboratory of Translational Oncology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Joseph JY Sung
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Jun Yu
- Institute of Digestive Disease and The Department of Medicine and Therapeutics, State Key Laboratory of Digestive Disease, Li Ka Shing Institute of Health Sciences, CUHK Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
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Ezeobiora CE, Igbokwe NH, Amin DH, Enwuru NV, Okpalanwa CF, Mendie UE. Uncovering the biodiversity and biosynthetic potentials of rare actinomycetes. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2022. [DOI: 10.1186/s43094-022-00410-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Abstract
Background
Antibiotic resistance is on the rise, and new antibiotic research has slowed in recent years, necessitating the discovery of possibly novel microbial resources capable of producing bioactive compounds. Microbial infections are gaining resistance to existing antibiotics, emphasizing the need for novel medicinal molecules to be discovered as soon as possible. Because the possibilities of isolating undiscovered actinomycetes strains have decreased, the quest for novel products has shifted to rare actinomycetes genera from regular environments or the identification of new species identified in unusual habitats.
Main body of the abstract
The non-streptomyces actinobacteria are known as rare actinomycetes that are extremely difficult to cultivate. Rare actinomycetes are known to produce a variety of secondary metabolites with varying medicinal value. In this review, we reported the diversity of rare actinomycetes in several habitat including soil, plants, aquatic environment, caves, insects and extreme environments. We also reported some isolation methods to easily recover rare Actinobacteria from various sources guided with some procedures to identify the rare Actinobacteria isolates. Finally, we reported the biosynthetic potential of rare actinomycetes and its role in the production of unique secondary metabolites that could be used in medicine, agriculture, and industry. These microbial resources will be of interest to humanity, as antibiotics, insecticides, anticancer, antioxidants, to mention but a few.
Short conclusion
Rare actinomycetes are increasingly being investigated for new medicinal compounds that could help to address existing human health challenges such as newly emerging infectious illnesses, antibiotic resistance, and metabolic disorders. The bioactive secondary metabolites from uncommon actinomycetes are the subject of this review, which focuses on their diversity in different habitats, isolation, identification and biosynthetic potentials.
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In Vitro Antitumor Activity of Endophytic and Rhizosphere Gram-Positive Bacteria from Ibervillea sonorae (S. Watson) Greene against L5178Y-R Lymphoma Cells. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19020894. [PMID: 35055716 PMCID: PMC8775836 DOI: 10.3390/ijerph19020894] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/31/2021] [Accepted: 01/12/2022] [Indexed: 12/17/2022]
Abstract
Plant-associated microorganisms represent a potential source of new antitumor compounds. The aim of the present study was to isolate endophytic and rhizosphere Gram-positive bacteria from Ibervillea sonorae and produce extracts with antitumor activity. Methanol and ethyl acetate extracts were obtained from 28 d bacterial fermentation, after which murine L5178Y-R lymphoma cells growth inhibition was evaluated at concentrations ranging from 15.62 µg/mL to 500 µg/mL by the 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide reduction colorimetric assay. IC50 and the selectivity index (SI) were calculated and compared with healthy control human peripheral blood mononuclear cells (PBMC). Identification of the isolated strains was performed using the 16S ribosomal gene and by MALDI-TOF MS mass spectrometry. The endophytic and rhizosphere bacterial extracts from strains ISE-B22, ISE-B26, ISE-B27, ISS-A01, ISS-A06, and ISS-A16 showed significant (p < 0.05) L5178Y-R cell growth inhibition, compared with an untreated control. The rhizosphere Micromonospora echinospora isolate ISS-A16 showed the highest (90.48%) percentage of lymphoma cells growth inhibition and SI (19.1) for PBMC, whereas the Bacillus subtilis ISE-B26 isolate caused significant (p < 0.01) growth inhibition (84.32%) and a SI of 5.2. Taken together, results of the present study evidenced antitumor effects by I. sonorae endophytic and rhizosphere bacteria culture extracts. Further research will involve the elucidation of the compounds that exert the antitumor activity and their evaluation in pre-clinical studies.
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An efficient method to screen for the soil bacteria producing therapeutically effective antibiotics. J Antibiot (Tokyo) 2021; 74:850-855. [PMID: 34493849 DOI: 10.1038/s41429-021-00476-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 08/12/2021] [Accepted: 08/24/2021] [Indexed: 02/08/2023]
Abstract
The discovery of novel therapeutic antimicrobials has become an urgent issue in response to the global crisis of the spread of multi-drug-resistant bacteria. In this report, we propose an efficient screening method for antimicrobial agents with therapeutic potential from soil bacteria. With this method, colonies of the soil bacteria were formed first on agar plates containing only an extract of soil, followed by an overlay of soft agar containing the pathogens, an antibiotic target. Then, we selected the colonies that formed the inhibitory zones on soft agar and evaluated the therapeutic efficacy of their culture supernatants using a silkworm bacterial infection model. Using Staphylococcus aureus as an indicator strain to obtain bacteria that produce therapeutically effective antimicrobials, we succeeded in reducing the screening size by 20-fold compared to the conventional method. An analysis of 86 antibiotics producers identified in this study indicated that the majority belonged to Streptomyces sp. and Lysobacter sp., well-known producers of secondary metabolites. Besides, the presence of eight genera and 37 species among the identified species indicated the diversity of antibiotic producers. Based on the finding of our study, we propose this method as an efficient way to discover novel antimicrobial agents that are therapeutically effective.
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Cheema MT, Ponomareva LV, Liu T, Voss SR, Thorson JS, Shaaban KA, Sajid I. Taxonomic and Metabolomics Profiling of Actinobacteria Strains from Himalayan Collection Sites in Pakistan. Curr Microbiol 2021; 78:3044-3057. [PMID: 34125273 PMCID: PMC10716794 DOI: 10.1007/s00284-021-02557-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 05/28/2021] [Indexed: 01/08/2023]
Abstract
Actinobacteria have proven themselves as the major producers of bioactive compounds with wide applications. In this study, 35 actinobacteria strains were isolated from soil samples collected from the Himalayan mountains region in Pakistan. The isolated strains were identified by polyphasic taxonomy and were prioritized based on biological and chemical screening to identify the strains with ability to produce inimitable metabolites. The biological screening included antimicrobial activity against Staphylococcus aureus, Micrococcus luteus, Salmonella enterica, Escherichia coli, Mycobacterium aurum, and Bacillus subtilis and anticancer activity using human cancer cell lines PC3 and A549. For chemical screening, methanolic extracts were investigated using TLC, HPLC-UV/MS. The actinobacteria strain PU-MM93 was selected for scale-up fermentation based on its unique chemical profile and cytotoxicity (50-60% growth inhibition) against PC3 and A549 cell lines. The scale-up fermentation of PU-MM93, followed by purification and structure elucidation of compounds revealed this strain as a promising producer of the cytotoxic anthracycline aranciamycin and aglycone SM-173-B along with the potent neuroprotective carboxamide oxachelin C. Other interesting metabolites produced include taurocholic acid as first report herein from microbial origin, pactamycate and cyclo(L-Pro-L-Leu). The study suggested exploring more bioactive microorganisms from the untapped Himalayan region in Pakistan, which can produce commercially significant compounds.
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Affiliation(s)
- Mohsin T Cheema
- Institute of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Larissa V Ponomareva
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Tao Liu
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
- Department of Natural Products Chemistry, School of Pharmacy, China Medical University, Shenyang, 110122, China
| | - S Randal Voss
- Department of Neuroscience, University of Kentucky, Lexington, KY, 40536, USA
- Ambystoma Genetic Stock Center, University of Kentucky, Lexington, KY, 40536, USA
- Spinal Cord and Brain Injury Research Center, University of Kentucky, Lexington, KY, 40536, USA
| | - Jon S Thorson
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA
| | - Khaled A Shaaban
- Center for Pharmaceutical Research and Innovation, University of Kentucky, Lexington, KY, 40536, USA.
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, 40536, USA.
| | - Imran Sajid
- Institute of Microbiology and Molecular Genetics, University of the Punjab, Lahore, Pakistan.
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Azish M, Shams-Ghahfarokhi M, Razzaghi-Abyaneh M. Antifungal activity and mechanism of action of dichloromethane extract fraction A from Streptomyces libani against Aspergillus fumigatus. J Appl Microbiol 2021; 131:1212-1225. [PMID: 33590651 DOI: 10.1111/jam.15040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 02/01/2021] [Accepted: 02/13/2021] [Indexed: 12/21/2022]
Abstract
AIMS This study aimed to investigate the mechanism of antifungal action of Streptomyces libani dichloromethane extract fraction A (DCEFA) against Aspergillus fumigatus and the host cytotoxicity. METHODS AND RESULTS DCEFA was purified from S. libani by autobiography and showed strong antifungal activity against A. fumigatus. A combination of electron microscopy, cell permeability assays, total oxidant status (TOS) assay, cell cytotoxicity assay and haemolysis activity was carried out to determine the target site of DCEFA. Exposure of A. fumigatus to DCEFA caused the damage to membranous cellular structures and increased release of cellular materials, potassium ions and TOS production. DCEFA was bound to ergosterol but did not affect fungal cell wall and ergosterol content. DCEFA did not show any obvious haemolytic activity for RBCs and toxicity against HEK-293 cell line. CONCLUSIONS DCEFA may inhibit A. fumigatus growth by targeting fungal cell membrane which results in the leakage of potassium ions and other cellular components, TOS production and final cell death. SIGNIFICANCE AND IMPACT OF THE STUDY DCEFA of S. libani could be considered as a potential source of novel antifungals which may be useful for drug development against A. fumigatus as a life-threatening human pathogen.
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Affiliation(s)
- M Azish
- Department of Mycology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - M Shams-Ghahfarokhi
- Department of Mycology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Ashfield-Crook NR, Woodward Z, Soust M, Kurtböke Dİ. Bioactive Streptomycetes from Isolation to Applications: A Tasmanian Potato Farm Example. Methods Mol Biol 2021; 2232:219-249. [PMID: 33161551 DOI: 10.1007/978-1-0716-1040-4_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The genus Streptomyces constitutes approximately 50% of all soil actinomycetes, playing a significant role in the soil microbial community through vital functions including nutrient cycling, production of bioactive metabolites, disease-suppression and plant growth promotion. Streptomyces produce many bioactive compounds and are prime targets for industrial and biotechnological applications. In addition to their agrobiological roles, some Streptomyces spp. can, however, be phytopathogenic, examples include, common scab of potato that causes economic losses worldwide. Currently used chemical control measures can have detrimental effect to environmental and human health as a result alternative methods to chemical disease control are being investigated. One alternative is the use of streptomycete specific phages to remove this pathogenic bacterium before it can cause the disease on potatoes. However, due to co-existence of non-common scab-causing species belonging to the genus Streptomyces, phage treatment is likely to affect a wide range of non-target streptomycete species including the beneficial ones in the soil. Therefore, before such treatment starts the host range of the phages within the targeted family of bacteria should be determined. In a study conducted using soil samples from a Tasmanian potato farm, streptomycetes were isolated and tested against streptomycete-specific phages. Their antifungal activity was also determined using multiple assays against selected phytopathogens. The four strongest antifungal activity-displaying isolates were further tested for their persistent antifungal activity using wheat and Fusarium solani in a pot trial. A second pot trial was also conducted to evaluate whether the beneficial streptomycetes were affected by streptophage treatment and whether their removal via the phage battery would cause opportunistic fungal infections to plants in soil. The streptomycetes prevented the reduction in wheat shoot weight caused by F. solani indicating their disease suppressive effect. However, when phages were added into the pots, the growth of wheat was detrimentally impacted. This finding might suggest that the reduced presence of antifungal streptomycetes via phage-induced lysis might encourage opportunistic fungal infections in plants.
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Affiliation(s)
- Nina R Ashfield-Crook
- GeneCology Research Centre and the School of Science and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, Australia
| | | | - Martin Soust
- Terragen Biotech Pty. Ltd., Coolum Beach, QLD, Australia
| | - D İpek Kurtböke
- GeneCology Research Centre and the School of Science and Engineering, University of the Sunshine Coast, Maroochydore DC, QLD, Australia.
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11
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Chandra P, Enespa, Singh R, Arora PK. Microbial lipases and their industrial applications: a comprehensive review. Microb Cell Fact 2020; 19:169. [PMID: 32847584 PMCID: PMC7449042 DOI: 10.1186/s12934-020-01428-8] [Citation(s) in RCA: 265] [Impact Index Per Article: 66.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/17/2020] [Indexed: 12/12/2022] Open
Abstract
Lipases are very versatile enzymes, and produced the attention of the several industrial processes. Lipase can be achieved from several sources, animal, vegetable, and microbiological. The uses of microbial lipase market is estimated to be USD 425.0 Million in 2018 and it is projected to reach USD 590.2 Million by 2023, growing at a CAGR of 6.8% from 2018. Microbial lipases (EC 3.1.1.3) catalyze the hydrolysis of long chain triglycerides. The microbial origins of lipase enzymes are logically dynamic and proficient also have an extensive range of industrial uses with the manufacturing of altered molecules. The unique lipase (triacylglycerol acyl hydrolase) enzymes catalyzed the hydrolysis, esterification and alcoholysis reactions. Immobilization has made the use of microbial lipases accomplish its best performance and hence suitable for several reactions and need to enhance aroma to the immobilization processes. Immobilized enzymes depend on the immobilization technique and the carrier type. The choice of the carrier concerns usually the biocompatibility, chemical and thermal stability, and insolubility under reaction conditions, capability of easy rejuvenation and reusability, as well as cost proficiency. Bacillus spp., Achromobacter spp., Alcaligenes spp., Arthrobacter spp., Pseudomonos spp., of bacteria and Penicillium spp., Fusarium spp., Aspergillus spp., of fungi are screened large scale for lipase production. Lipases as multipurpose biological catalyst has given a favorable vision in meeting the needs for several industries such as biodiesel, foods and drinks, leather, textile, detergents, pharmaceuticals and medicals. This review represents a discussion on microbial sources of lipases, immobilization methods increased productivity at market profitability and reduce logistical liability on the environment and user.
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Affiliation(s)
- Prem Chandra
- Food Microbiology & Toxicology, Department of Microbiology, School for Biomedical and Pharmaceutical Sciences, Babasaheb Bhimrao Ambedkar University (A Central) University, Lucknow, Uttar Pradesh 226025 India
| | - Enespa
- Department of Plant Pathology, School for Agriculture, SMPDC, University of Lucknow, Lucknow, 226007 U.P. India
| | - Ranjan Singh
- Department of Environmental Science, School for Environmental Science, Babasaheb Bhimrao Ambedkar University (A Central) University, Lucknow, U.P. India
| | - Pankaj Kumar Arora
- Department of Microbiology, School for Biomedical and Pharmaceutical Sciences, Babasaheb Bhimrao Ambedkar University (A Central) University, Lucknow, U.P. India
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12
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Domeignoz-Horta LA, Pold G, Liu XJA, Frey SD, Melillo JM, DeAngelis KM. Microbial diversity drives carbon use efficiency in a model soil. Nat Commun 2020; 11:3684. [PMID: 32703952 PMCID: PMC7378083 DOI: 10.1038/s41467-020-17502-z] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 06/19/2020] [Indexed: 02/01/2023] Open
Abstract
Empirical evidence for the response of soil carbon cycling to the combined effects of warming, drought and diversity loss is scarce. Microbial carbon use efficiency (CUE) plays a central role in regulating the flow of carbon through soil, yet how biotic and abiotic factors interact to drive it remains unclear. Here, we combine distinct community inocula (a biotic factor) with different temperature and moisture conditions (abiotic factors) to manipulate microbial diversity and community structure within a model soil. While community composition and diversity are the strongest predictors of CUE, abiotic factors modulated the relationship between diversity and CUE, with CUE being positively correlated with bacterial diversity only under high moisture. Altogether these results indicate that the diversity × ecosystem-function relationship can be impaired under non-favorable conditions in soils, and that to understand changes in soil C cycling we need to account for the multiple facets of global changes.
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Affiliation(s)
| | - Grace Pold
- Graduate Program in Organismic and Evolutionary Biology, University of Massachusetts, Amherst, MA, 01003, USA
| | - Xiao-Jun Allen Liu
- Department of Microbiology, University of Massachusetts, Amherst, MA, 01003, USA
| | - Serita D Frey
- School of Natural Resources and the Environment, University of New Hampshire, Durham, NH, 03824, USA
| | - Jerry M Melillo
- The Ecosystems Center, Marine Biological Laboratories, Woods Hole, MA, 02543, USA
| | - Kristen M DeAngelis
- Department of Microbiology, University of Massachusetts, Amherst, MA, 01003, USA.
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13
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He Y, Ding Y, Wu Q, Chen M, Zhao S, Zhang J, Wei X, Zhang Y, Bai J, Mo S. Identification of the Potential Biological Preservative Tetramycin A-Producing Strain and Enhancing Its Production. Front Microbiol 2020; 10:2925. [PMID: 31993025 PMCID: PMC6971103 DOI: 10.3389/fmicb.2019.02925] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2019] [Accepted: 12/04/2019] [Indexed: 01/05/2023] Open
Abstract
The aim of this study was to develop a potential microbial preservative to prevent the growth of fungi in food. The isolate ZC-G-5 showed strong antifungal activity against food spoilage fungi and Streptomyces albulus was identified on the basis of morphologic, culture, and 16S rDNA sequence analyses. The active metabolite was elucidated as tetramycin A (TMA) through spectroscopic techniques, including HR-ESI-MS, 1D-NMR, and 2D-NMR. An antifungal activity assay revealed that the minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) of TMA were 1.50-2.50 and 3.00-5.00 μg/ml, respectively. In situ antifungal activity analyses demonstrated that 90.0 μg/ml of TMA could inhibit the growth of fungi for over 14 days. In order to enhance TMA production, the high-yield mutant strain YB101 was screened, based on the isolate ZC-G-5, using a high-throughput screening method. The best metabolic precursor was selected during fermentation, when the concentration of glycerol was 8% (v/v) in Gauze's broth medium to cultivate the mutant strain YB101; the concentration of TMA could be increased to 960.0 μg/ml, compared with the original isolate ZC-G-5, where the concentration of the TMA was only 225.0 μg/ml. Our study may contribute to the application of S. albulus and its active metabolite as a potential bio-preservative in the food industry.
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Affiliation(s)
- Yinglong He
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, China.,Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.,Guangzhou Institute of Chemistry, University of Chinese Academy of Sciences, Beijing, China
| | - Yu Ding
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.,Department of Food Science and Technology, Institute of Food Safety and Nutrition, Jinan University, Guangzhou, China
| | - Qingping Wu
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Moutong Chen
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - San'e Zhao
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Jumei Zhang
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Xianhu Wei
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Youxiong Zhang
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Jianling Bai
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Shuping Mo
- Guangdong Open Laboratory of Applied Microbiology, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
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Arango C, Acosta-Gonzalez A, Parra-Giraldo CM, Sánchez-Quitian ZA, Kerr R, Díaz LE. Characterization of Actinobacterial Communities from Arauca River Sediments (Colombia) Reveals Antimicrobial Potential Presented in Low Abundant Isolates. Open Microbiol J 2018; 12:181-194. [PMID: 29997703 PMCID: PMC5997859 DOI: 10.2174/1874285801812010181] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 05/15/2018] [Accepted: 05/16/2018] [Indexed: 12/04/2022] Open
Abstract
INTRODUCTION New strategies have been arisen to set a rapid and effective screening for selection of microorganism with bioactive potential. This study suggests that combination of physicochemical pretreatments and taxonomic dereplication of microbial collections through MALDI-TOF MS, facilitates the detection of low abundance actinobacteria with potential as a source of antimicrobial agents. MATERIAL AND METHODS An unstudied microbial community from a tropical river sediment in Colombian Orinoquía is described, applying an extended cultivation strategy using physicochemical pretreatments, biological screenings and taxonomic dereplication through MALDI-TOF MS approach. RESULTS Actinobacteria-like isolates (790) were growth and their antimicrobial activity was assessed against methicillin-resistant Staphylococcus aureus, Vancomycin-resistant Enterococcus faecium, extended-spectrum β-lactamase Klebsiella pnumoniae, and clinical isolates of Cladosporium cladosporioides and Epicoccum nigrum. Seventy-eight isolates, belonging to the Streptomycetaceae family according to 16S rDNA analysis were found to have antimicrobial activity and were categorized as low abundance actinobacteria by MALDI-TOF MS. CONCLUSION The results suggest that combination of physicochemical pretreatments and taxonomic dereplication of microbial collections through MALDI-TOF MS, facilitates the detection of low abundance actinobacteria with potential as a source of antimicrobial agents.
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Affiliation(s)
- Carolina Arango
- Universidad de La Sabana, Campus del Puente del Común, Km 7 Autopista Norte de Bogotá, Chia, Colombia
| | - Alejandro Acosta-Gonzalez
- Universidad de La Sabana, Campus del Puente del Común, Km 7 Autopista Norte de Bogotá, Chia, Colombia
| | - Claudia M. Parra-Giraldo
- Universidad de La Sabana, Campus del Puente del Común, Km 7 Autopista Norte de Bogotá, Chia, Colombia
| | - Zilpa A. Sánchez-Quitian
- Universidad de La Sabana, Campus del Puente del Común, Km 7 Autopista Norte de Bogotá, Chia, Colombia
| | - Russell Kerr
- University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada
| | - Luis E. Díaz
- Universidad de La Sabana, Campus del Puente del Común, Km 7 Autopista Norte de Bogotá, Chia, Colombia
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15
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Long-Term Warming Alters Carbohydrate Degradation Potential in Temperate Forest Soils. Appl Environ Microbiol 2016; 82:6518-6530. [PMID: 27590813 PMCID: PMC5086546 DOI: 10.1128/aem.02012-16] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 08/19/2016] [Indexed: 11/20/2022] Open
Abstract
As Earth's climate warms, soil carbon pools and the microbial communities that process them may change, altering the way in which carbon is recycled in soil. In this study, we used a combination of metagenomics and bacterial cultivation to evaluate the hypothesis that experimentally raising soil temperatures by 5°C for 5, 8, or 20 years increased the potential for temperate forest soil microbial communities to degrade carbohydrates. Warming decreased the proportion of carbohydrate-degrading genes in the organic horizon derived from eukaryotes and increased the fraction of genes in the mineral soil associated with Actinobacteria in all studies. Genes associated with carbohydrate degradation increased in the organic horizon after 5 years of warming but had decreased in the organic horizon after warming the soil continuously for 20 years. However, a greater proportion of the 295 bacteria from 6 phyla (10 classes, 14 orders, and 34 families) isolated from heated plots in the 20-year experiment were able to depolymerize cellulose and xylan than bacterial isolates from control soils. Together, these findings indicate that the enrichment of bacteria capable of degrading carbohydrates could be important for accelerated carbon cycling in a warmer world.
IMPORTANCE The massive carbon stocks currently held in soils have been built up over millennia, and while numerous lines of evidence indicate that climate change will accelerate the processing of this carbon, it is unclear whether the genetic repertoire of the microbes responsible for this elevated activity will also change. In this study, we showed that bacteria isolated from plots subject to 20 years of 5°C of warming were more likely to depolymerize the plant polymers xylan and cellulose, but that carbohydrate degradation capacity is not uniformly enriched by warming treatment in the metagenomes of soil microbial communities. This study illustrates the utility of combining culture-dependent and culture-independent surveys of microbial communities to improve our understanding of the role changing microbial communities may play in soil carbon cycling under climate change.
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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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17
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Zhan Y, Zheng S. Efficient production of nonactin by Streptomyces griseus subsp. griseus. Can J Microbiol 2016; 62:711-4. [DOI: 10.1139/cjm-2016-0248] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Here we report the production of the cyclic macrotetrolide nonactin from the fermentation culture of Streptomyces griseus subsp. griseus. Nonactin is a member of a family of naturally occurring cyclic ionophores known as the macrotetrolide antibiotics. Our fermentation procedure of Streptomyces griseus was performed at 30 °C and 200 rev·min−1 for 5 days on a rotary shaker. Diaion HP-20 and Amberlite XAD-16 were added to the fermentation medium. Isolated yield of nonactin was up to 80 mg·L−1 using our methodology. Nonactin is commonly known as an ammonium ionophore and also exhibits antibacterial, antiviral, and antitumor activities. It is also widely used for the preparation of ion-selective electrodes and sensors. Chemical synthesis of nonactin has been achieved by some groups; however, overall yields are very low, making efficient biosynthesis an attractive means of production.
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Affiliation(s)
- Yulian Zhan
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, People’s Republic of China
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, People’s Republic of China
| | - Shaolun Zheng
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, People’s Republic of China
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin 541004, People’s Republic of China
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18
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Bacterial Endo-Symbiont Inhabiting Tridax procumbens L. and Their Antimicrobial Potential. ACTA ACUST UNITED AC 2015. [DOI: 10.1155/2015/309267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Bacterial symbionts inhabiting Tridax procumbens L. were screened for antimicrobial potential with the aim to isolate potent bacteria bearing significant activity against test pathogens. The selected isolate was subjected to large scale fermentation to extract antimicrobial metabolite. The organic phase was reduced under vacuum pressure and crude ethyl acetate extract (10 mg/mL) was evaluated for antimicrobial activity against panel of test pathogens. The antibacterial activity was measured as a zone of inhibition and compared with standard antibiotics, gentamicin and tetracycline. Similarly, antifungal activity was compared with miconazole and bavistin. Significant activity was conferred against Shigella flexneri (MTCC 731) with 27±1.5 mm zone across the disc. Partially, purification of antimicrobial metabolite with TLC-bioautography and HPLC resulted in active fraction bearing activity at Rf 0.65 and eluting between 4 and 5 retention times. The obtained results are promising enough for future purification and characterization of antimicrobial metabolite. Thus, the study attributes to the growing knowledge on endophytes as one of the rich sources of antimicrobial potentials.
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Aftab U, Zechel DL, Sajid I. Antitumor compounds from Streptomyces sp. KML-2, isolated from Khewra salt mines, Pakistan. Biol Res 2015; 48:58. [PMID: 26466995 PMCID: PMC4607010 DOI: 10.1186/s40659-015-0046-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 09/29/2015] [Indexed: 12/21/2022] Open
Abstract
Background Actinomycetes are gram positive bacteria with high G + C content in their DNA and are capable of producing variety of secondary metabolites. Many of these metabolites possess different biological activities and have the potential to be developed as therapeutic agents. The aim of the present study was to screen actinomycetes inhabiting halophilic environment such as Khewra salt mines present in Pakistan for cytotoxic and antitumor compounds. Results An actiomycetes strain designated as Streptomyces sp. KML-2 was isolated from a saline soil of Khewra salt mines, Pakistan. The strain Streptomyces sp. KML-2 showed 84 % cytotoxic activity against larvae of Artemia salina. In the screening phase, the strain exhibited significant antitumor activity with IC50 values of 12, 48 and 56 µg/ml against Hela, MDBK and Vero cell lines, respectively. After that extract from 20 l fermentation was used to purify secondary metabolites by several chromatographic techniques. Structure elucidation of isolated compounds revealed that it is highly stable producer of Chromomycin SA (1) and 1-(1H-indol-3-yl)-propane-1,2,3-triol (2). Both of the isolated compounds showed significant antitumor activity against Hela and MCF-7 cancer cell lines (IC50 values 8.9 and 7.8 µg/ml against Hela; 12.6 and 0.97 µg/ml against MCF-7, respectively). The 16S rRNA gene sequence (1437 bp) of the strain confirm its identity (99 %) with Streptomyces griseus. Conclusions From this research work we were successful in isolating two potent antitumor compounds, Chromomycin SA and 1-(1H-indol-3-yl)-propane-1,2,3-triol from Streptomyces KML-2 strain, isolated from Khewra salt mine. As such this is the second report which confirms that S. griseus can produce Chromomycin SA without introducing any mutagenesis in its biosynthesizing gene cluster and isolated indole derivative is being reported first time from any member of actinomycetes group with having novel antitumor activity against Hela and MCF-7 cells. Nucleotide sequences: Nucleotide sequence data reported are available in the GenBank database under the accession number: GenBank KJ009562. Electronic supplementary material The online version of this article (doi:10.1186/s40659-015-0046-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Usman Aftab
- Department of Microbiology and Molecular Genetics, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590, Pakistan. .,Department of Chemistry, Queens University, Kingston, ON, K7L 3N6, Canada.
| | - David L Zechel
- Department of Chemistry, Queens University, Kingston, ON, K7L 3N6, Canada.
| | - Imran Sajid
- Department of Microbiology and Molecular Genetics, University of the Punjab, Quaid-e-Azam Campus, Lahore, 54590, Pakistan.
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Streptomyces ferrugineus sp. nov., isolated from mangrove soil in Thailand. Antonie van Leeuwenhoek 2014; 107:39-45. [PMID: 25331336 DOI: 10.1007/s10482-014-0301-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 10/06/2014] [Indexed: 10/24/2022]
Abstract
Bacterial strain HV38(T) was isolated from mangrove soil, which was collected from Thailand. Chemotaxonomic and morphological characteristics were found to be typical of members of the genus Streptomyces. The strain was found to form a distinct phyletic line in the Streptomyces 16S rRNA gene tree and to be closely associated with the type strains of Streptomyces coeruleofuscus CGMCC 4.1667(T) (98.84 % sequence similarity), Streptomyces chromofuscus CGMCC 4.1451(T) (98.63 %) and Streptomyces albidoflavus CGMCC 4.1291(T) (98.56 %). The major menaquinones were identified as MK-9(H8) and MK-9(H10). Its major cellular fatty acids were found to be iso-C14:0, iso-C15:0, anteiso-C15:0, iso-C16:1ω8c, C16:0, anteiso-C16:1ω8c, iso-C16:0 and anteiso-C16:0. The DNA-DNA hybridization values between strain HV38(T) with S. coeruleofuscus CGMCC 4.1667(T), S. chromofuscus CGMCC 4.1451(T) and S. albidoflavus CGMCC 4.1291(T) were 32.7 ± 0.9, 21.8 ± 0.3 and 19.9 ± 0.9 %, respectively, which clearly supported the conclusion that they belong to separate genomic species. Cumulatively, the data indicated that strain HV38(T) represents a novel species of the genus Streptomyces, for which the name Streptomyces ferrugineus sp. nov. is proposed. The type strain is HV38(T) (=CCTCC AA2014009(T )= DSM 42152(T)).
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Sujada N, Sungthong R, Lumyong S. Termite nests as an abundant source of cultivable actinobacteria for biotechnological purposes. Microbes Environ 2014; 29:211-9. [PMID: 24909709 PMCID: PMC4103528 DOI: 10.1264/jsme2.me13183] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
A total of 118 actinobacterial isolates were collected from the three types of termite nests (mound, carton, and subterranean nests) to evaluate their potential as a source of bioactive actinobacteria with antimicrobial activity. The highest number (67 isolates) and generic abundance (7 known genera) of actinobacterial isolates were obtained from carton nests. Streptomyces was the dominant genus in each type of termite nest. In the non-Streptomyces group, Nocardia was the dominant genus detected in mound and carton nests, while Pseudonocardia was the dominant genus in subterranean nests. A discovery trend of novel species (<99% similarity in the 16S rRNA gene sequence) was also observed in the termite nests examined. Each type of termite nest housed >20% of bioactive actinobacteria that could inhibit the growth of at least one test organism, while 12 isolates, belonging to the genera Streptomyces, Amycolatopsis, Pseudonocardia, Micromonospora and Nocardia, exhibited distinct antimicrobial activities. Streptomyces sp. CMU-NKS-3 was the most distinct bioactive isolate. It was closely related to S. padanus MITKK-103T, which was confirmed by 99% similarities in their 16S rRNA gene sequences. The highest level of extracellular antimicrobial substances was produced by the isolate CMU-NKS-3, which was grown in potato dextrose broth and exhibited a wide range (6.10×10−4–1.25 mg mL−1) of minimum inhibitory concentrations against diverse pathogens. We concluded that termite nests are an abundant source of bioactive strains of cultivable actinobacteria for future biotechnological needs.
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Affiliation(s)
- Nikhom Sujada
- Department of Biology, Faculty of Science, Chiang Mai University
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22
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Isolation and characterization of novel alkali-halophilic actinomycetes from the Chilika brackish water lake, India. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-0831-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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23
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Subramani R, Aalbersberg W. Culturable rare Actinomycetes: diversity, isolation and marine natural product discovery. Appl Microbiol Biotechnol 2013; 97:9291-321. [DOI: 10.1007/s00253-013-5229-7] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 08/29/2013] [Accepted: 09/02/2013] [Indexed: 11/30/2022]
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24
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Sánchez-Hidalgo M, Pascual J, de la Cruz M, Martín J, Kath GS, Sigmund JM, Masurekar P, Vicente F, Genilloud O, Bills GF. Prescreening bacterial colonies for bioactive molecules with Janus plates, a SBS standard double-faced microbial culturing system. Antonie van Leeuwenhoek 2012; 102:361-74. [PMID: 22562433 PMCID: PMC3397223 DOI: 10.1007/s10482-012-9746-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Accepted: 04/24/2012] [Indexed: 12/21/2022]
Abstract
Despite the availability of many culture-based antibiotic screening methods, the lack of sensitive automated methods to identify functional molecules directly from microbial cells still limits the search for new biologically active compounds. The effectiveness of antibiotic detection is influenced by the solubility of the assayed compounds, indicator strain sensitivity, culture media and assay configuration. We describe a qualitative high throughput screening system for detecting cell-perturbing molecules from bacterial colonies employing two opposed agar layers sequentially formed in prototype Society for Biomolecular Screening (SBS) plates, named Janus plates. Direct assay of microbial colonies against target organisms in opposed agar layers overcomes some of the limitations of agar overlay methods. The system enables the rapid detection of extracellular cell-perturbing molecules, e.g., antibiotics, excreted directly from environmental isolates. The source bacterial colonies remain separate from the target organism. The growth layer is prepared and grown independently, so environmental strains can be grown for longer intervals, at temperatures and in media that favor their growth and metabolite expression, while the assay layer with pathogens, usually requiring nutrient-rich medium and elevated temperatures, are added later. Colonies to be tested can be precisely arrayed on the first agar surface, thus avoiding dispersion and disturbance of potential antibiotic-producing colonies by overlaying agar with the target strain. The rectangular SBS configuration facilitates factorial replication of dense microbial colony arrays for testing with multiple assays and assay conditions employing robotic colony pickers and pin tools. Opposed agar layers only slightly reduced the effectiveness for detecting growth inhibition from pure antibiotics compared to single-layer agar diffusion assays. The Janus plate enabled an automation-assisted workflow where a lone operator can effectively identify and accumulate bioactive soil bacterial strains within a few weeks. We also envisage the method's utility for functional prescreening colonies of clones from genomic and metagenomic libraries or improved strains originating from mutagenized cells.
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Affiliation(s)
- Marina Sánchez-Hidalgo
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain
| | - Javier Pascual
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain
| | - Mercedes de la Cruz
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain
| | - Jesús Martín
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain
| | - Gary S. Kath
- Design-To-Prototype LLC, 2671 Sky Top Drive, Scotch Plains, NJ 07076 USA
| | - Janet M. Sigmund
- Natural Products Discovery Institute, 3805 Old Easton Road, Doylestown, PA 18902 USA
| | - Prakash Masurekar
- Department of Plant Biology & Pathology, Rutgers University, Foran Hall, Cook Campus 59 Dudley Rd., New Brunswick, NJ 08901 USA
| | - Francisca Vicente
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain
| | - Olga Genilloud
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain
| | - Gerald F. Bills
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avda. del Conocimiento 3, Parque Tecnológico de Ciencias de la Salud, 18100 Armilla, Granada, Spain
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ISTIANTO YUDHIE, SETYO ADJI KOESOEMOWIDODO RADEN, WATANABE YOSHIO, PRANAMUDA HARDANING, MARWOTO BAMBANG. Application of Phenol Pretreatment for the Isolation of Rare Actinomycetes from Indonesian Soil. MICROBIOLOGY INDONESIA 2012. [DOI: 10.5454/mi.6.1.7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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26
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Diversity of members of the Streptomyces violaceusniger 16S rRNA gene clade in the legumes rhizosphere in Turkey. ANN MICROBIOL 2010. [DOI: 10.1007/s13213-010-0112-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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27
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Diversity of culturable Streptomycetes from wheat cropping system of fertile regions of Indo-Gangetic Plains, India. World J Microbiol Biotechnol 2010. [DOI: 10.1007/s11274-010-0612-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Sazak A, Şahin N, Güven K, Işık K, Goodfellow M. Streptomyces samsunensis sp. nov., a member of the Streptomyces violaceusniger clade isolated from the rhizosphere of Robinia pseudoacacia. Int J Syst Evol Microbiol 2010; 61:1309-1314. [PMID: 20656824 DOI: 10.1099/ijs.0.021329-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The taxonomic position of a Streptomyces isolate, strain M1463(T), recovered from the rhizosphere of Robinia pseudoacacia was established in a polyphasic study. The organism had chemical and morphological markers that were consistent with its classification in the Streptomyces violaceusniger clade. This assignment was confirmed by 16S rRNA gene sequence data, which also showed that the strain formed a distinct subclade together with Streptomyces malaysiensis DSM 41697(T). However, the two strains were readily distinguished on the basis of DNA relatedness and phenotypic data. The combined genotypic and phenotypic data show that strain M1463(T) should be recognized as a representative of a novel species in the Streptomyces violaceusniger clade, for which the name Streptomyces samsunensis sp. nov. is proposed. The type strain of S. samsunensis is M1463(T) ( = DSM 42010(T) = NRRL B-24803(T)).
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Affiliation(s)
- Anıl Sazak
- Department of Biology, Faculty of Art and Science, Ondokuz Mayıs University, 55139 Kurupelit-Samsun, Turkey
| | - Nevzat Şahin
- Department of Biology, Faculty of Art and Science, Ondokuz Mayıs University, 55139 Kurupelit-Samsun, Turkey
| | - Kıymet Güven
- Department of Biology, Faculty of Science, Anadolu University, Eskisehir, Turkey
| | - Kamil Işık
- Department of Biology, Faculty of Art and Science, Ondokuz Mayıs University, 55139 Kurupelit-Samsun, Turkey
| | - Michael Goodfellow
- Department of Biology, University of Newcastle, Newcastle upon Tyne NE1 7RU, UK
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Kavitha A, Prabhakar P, Vijayalakshmi M, Venkateswarlu Y. Purification and biological evaluation of the metabolites produced by Streptomyces sp. TK-VL_333. Res Microbiol 2010; 161:335-45. [PMID: 20403429 DOI: 10.1016/j.resmic.2010.03.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Revised: 03/29/2010] [Accepted: 03/30/2010] [Indexed: 11/29/2022]
Abstract
An Actinobacterium strain isolated from laterite soils of the Guntur region was identified as Streptomyces sp. TK-VL_333 by 16S rRNA analysis. Cultural, morphological and physiological characteristics of the strain were recorded. The secondary metabolites produced by the strain cultured on galactose-tyrosine broth were extracted and concentrated followed by defatting of the crude extract with cyclohexane to afford polar and non-polar residues. Purification of the two residues by column chromatography led to isolation of five polar and one non-polar fraction. Bioactivity- guided fractions were rechromatographed on a silica gel column to obtain four compounds, namely 1H-indole-3-carboxylic acid, 2,3-dihydroxy-5-(hydroxymethyl) benzaldehyde, 4-(4-hydroxyphenoxy) butan-2-one and acetic acid-2-hydroxy-6-(3-oxo-butyl)-phenyl ester from three active polar fractions and 8-methyl decanoic acid from one non-polar fraction. The structure of the compounds was elucidated on the basis of FT-IR, mass and NMR spectroscopy. The antimicrobial activity of the bioactive compounds produced by the strain was tested against the bacteria and fungi and expressed in terms of minimum inhibitory concentration. Antifungal activity of indole-3-carboxylic acid was further evaluated under in vitro and in vivo conditions. This is the first report of 2,3-dihydroxy-5-(hydroxymethyl) benzaldehyde, 4-(4-hydroxyphenoxy) butan-2-one, acetic acid-2-hydroxy-6-(3-oxo-butyl)-phenyl ester and 8-methyl decanoic acid from the genus Streptomyces.
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Affiliation(s)
- Alapati Kavitha
- Department of Botany and Microbiology, Acharya Nagarjuna University, Guntur 522510, India
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30
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Kang MJ, Strap JL, Crawford DL. Isolation and characterization of potent antifungal strains of the Streptomyces violaceusniger clade active against Candida albicans. J Ind Microbiol Biotechnol 2009; 37:35-41. [PMID: 19784681 PMCID: PMC2797434 DOI: 10.1007/s10295-009-0641-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Accepted: 09/10/2009] [Indexed: 11/29/2022]
Abstract
Streptomyces strains were isolated from a sagebrush rhizosphere soil sample on humic acid vitamin (HV) agar and water yeast extract (WYE) agar supplemented with 1.5% (w/w) phenol as a selective medium. Acidic, neutral and alkaline pH conditions were also used in the isolation procedures. The phenol treatment reduced the numbers of both actinomycetes and non-actinomycetes on plates under all three pH conditions. From phenol-amended HV and WYE agar, 16 strains were isolated in pure culture; 14 from the HV agar and two from the WYE agar. All the isolates were tested for their antifungal activities against Pythium ultimum P8 and five yeast strains, including two antifungal drug-resistant Candida albicans strains. HV isolates that showed broad-spectrum antifungal antibiotic activities were all found to be members of the Streptomyces violaceusniger clade, while those that did not were non-clade members. The phenol treatment was not selective for S. violaceusniger clade members. Therefore, we tested the spores of both S. violaceusniger clade and non-clade members using two biocides, phenol and hydrogen peroxide, as selection agents. Spores of non-clade members, such as S. coelicolor M145 and S. lividans TK 21, survived these two biocides just as well as S. violaceusniger clade members. Thus, in our hands, biocide resistance was not S. violaceusniger clade specific as previously reported. However, isolates showing broad-spectrum antifungal and antiyeast activity were all members of the clade. We conclude that screening of isolates for broad-spectrum antifungal/antiyeast activity is the preferred method of isolating S. violaceusniger clade strains rather than biocide-based selection. Phylogenetic analysis of the phenol-resistant isolates revealed that the HV isolates that exhibited broad-spectrum antifungal antibiotic activity were all clustered and closely related to the S. violaceusniger clade, while the isolates that did not exhibit antifungal antibiotic activity were all non-clade members.
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Affiliation(s)
- Min J Kang
- Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla, 92093-0358, USA.
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31
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Actinomycetes isolated from medicinal plant rhizosphere soils: diversity and screening of antifungal compounds, indole-3-acetic acid and siderophore production. World J Microbiol Biotechnol 2008. [DOI: 10.1007/s11274-008-9933-x] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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32
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Sajid I, Fotso Fondja Yao CB, Shaaban KA, Hasnain S, Laatsch H. Antifungal and antibacterial activities of indigenous Streptomyces isolates from saline farmlands: prescreening, ribotyping and metabolic diversity. World J Microbiol Biotechnol 2008. [DOI: 10.1007/s11274-008-9928-7] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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33
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Kageyama A, Takahashi Y, Ōmura S. Humihabitans oryzae gen. nov., sp. nov. Int J Syst Evol Microbiol 2007; 57:2163-2166. [PMID: 17766892 DOI: 10.1099/ijs.0.65069-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Strain KV-657T was isolated from a paddy field soil sample collected in Japan using GPM agar plates supplemented with catalase. The strain was a Gram-positive, aerobic organism that formed branching hyphae with ll-diaminopimelic acid as the diagnostic peptidoglycan diamino acid. The major menaquinone was MK-8(H4). Mycolic acids were not detected. The G+C content of the DNA was 70 mol%. 16S rRNA gene sequence analysis revealed that this strain is closely related to Intrasporangium calvum DSM 43043T, with a similarity of 97.6 %. Based on the morphological, biochemical and chemotaxonomic properties of this strain and phylogenetic analysis, it was concluded that this isolate represents a new genus and species in the family Intrasporangiaceae, for which the name Humihabitans oryzae gen. nov., sp. nov. is proposed. The type strain of Humihabitans oryzae is KV-657T (=NRRL B-24470T =NBRC 101802T).
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MESH Headings
- Actinomycetales/classification
- Actinomycetales/genetics
- Actinomycetales/isolation & purification
- Actinomycetales/metabolism
- Aerobiosis
- Base Composition
- DNA, Bacterial/chemistry
- DNA, Bacterial/genetics
- DNA, Ribosomal/chemistry
- DNA, Ribosomal/genetics
- Diaminopimelic Acid/analysis
- Genes, rRNA
- Japan
- Molecular Sequence Data
- Mycolic Acids/analysis
- Peptidoglycan/chemistry
- Phylogeny
- RNA, Bacterial/genetics
- RNA, Ribosomal, 16S/genetics
- Sequence Analysis, DNA
- Sequence Homology, Nucleic Acid
- Soil Microbiology
- Vitamin K 2/analysis
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Affiliation(s)
- Akiko Kageyama
- Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Yoko Takahashi
- Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
| | - Satoshi Ōmura
- The Kitasato Institute, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
- Kitasato Institute for Life Sciences, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan
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Kumar Y, Aiemsum-Ang P, Ward AC, Goodfellow M. Diversity and geographical distribution of members of the Streptomyces violaceusniger 16S rRNA gene clade detected by clade-specific PCR primers. FEMS Microbiol Ecol 2007; 62:54-63. [PMID: 17725621 DOI: 10.1111/j.1574-6941.2007.00374.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The Streptomyces violaceusniger 16S rRNA gene clade contains organisms that are of ecological interest and a rich source of novel bioactive metabolites. Improvements in the classification of members of the S. violaceusniger clade made it possible to design, evaluate and use an oligonucleotide primer set to gain an insight into the presence, distribution and taxonomic diversity of members of this taxon in environmental samples. In silico testing showed that the primers had a perfect match with representatives of the S. violaceusniger clade. The primers, designated S-S-Svio-66-a-S-20 and S-S-Svio-1274-a-A-20, amplified an approximately 1190-bp stretch of 16S rRNA gene from authenticated members of the S. violaceusniger clade, but not from representatives of other actinomycete taxa. Following amplification of DNA extracted from sediment and soil samples, the sequences of cloned PCR products confirmed the specific amplification of target sequences in 87% of the clones; the use of 16S rRNA gene fragment similarity correlations indicated that the clones represented new species. The primers can be used to facilitate the isolation of novel members of the S. violaceusniger 16S rRNA gene clade by allowing prescreening of environmental samples and the subsequent detection and retrieval of targetted strains through the use of selective isolation procedures.
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MESH Headings
- Biodiversity
- DNA Primers/genetics
- DNA, Bacterial/chemistry
- DNA, Bacterial/genetics
- DNA, Bacterial/isolation & purification
- DNA, Ribosomal/chemistry
- DNA, Ribosomal/genetics
- DNA, Ribosomal/isolation & purification
- Environmental Microbiology
- Genotype
- Molecular Sequence Data
- Polymerase Chain Reaction/methods
- RNA, Ribosomal, 16S/chemistry
- RNA, Ribosomal, 16S/genetics
- RNA, Ribosomal, 16S/isolation & purification
- Sensitivity and Specificity
- Sequence Analysis, DNA
- Streptomyces/classification
- Streptomyces/genetics
- Streptomyces/isolation & purification
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Affiliation(s)
- Yashawant Kumar
- School of Biology, University of Newcastle, Newcastle upon Tyne, UK
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A New Enrichment Method for the Selective Isolation of Streptomycetes from the Root Surfaces of Herbaceous Plants. ACTA ACUST UNITED AC 2007. [DOI: 10.3209/saj.saj210202] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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