1
|
Elumalai L, Nagarajan S, Anbalmani S, Murthy S, Manikkam R, Ramasamy B. Bioactive compound from marine seagrass Streptomyces argenteolus TMA13: combatting fish pathogens with time-kill kinetics and live-dead cell imaging. Braz J Microbiol 2024; 55:2669-2681. [PMID: 39028533 PMCID: PMC11405562 DOI: 10.1007/s42770-024-01407-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Accepted: 05/28/2024] [Indexed: 07/20/2024] Open
Abstract
Actinobacteria, pervasive in aquatic and terrestrial environments, exhibit a filamentous morphology, possess DNA with a specific G + C content and production of numerous secondary metabolites. This study, focused on actinobacteria isolated from marine seagrass, investigating their antibacterial activity against fish pathogens. Among 28 isolates, Streptomyces argenteolus TMA13 displayed the maximum zone of inhibition against fish pathogens-Aeromonas hydrophila (10 mm), Aeromonas caviae (22 mm), Edwardsiella tarda (17 mm), Vibrio harveyi (22 mm) and Vibrio anguillarum (12 mm) using the agar plug method. Optimization of this potent strain involved with various factors, including pH, temperature, carbon source and salt condition to enhance both yield production and antibacterial efficacy. In anti-biofilm assay shows the maximum percentage of inhibition while increasing concentration of TMA13 extract. Minimal Inhibitory Concentration (MIC) and Minimal Bactericidal Concentration (MBC) assays with TMA13 crude extract demonstrated potent activity against fish pathogens at remarkably low concentrations. Time-kill kinetics assay showcased growth curve variations over different time intervals for all fish pathogens treated with a 100 µg/ml concentration of crude extract, indicating a decline in cells viability and progression into the death phase. Additionally, fluorescence microscopic visualization of bacterial cells exposed to the extracts emitting green and red fluorescence, enabling live-dead cell differentiation was also studied. Further characterization of the crude extract through GC-MS and FT-IR analyses performed and identified secondary metabolites with functional groups exhibiting significant antibacterial activity. This study elucidates the capacity of Streptomyces argenteolus TMA13 to enhance the production of antibiotic compounds effective against fish pathogens.
Collapse
Affiliation(s)
- Lokesh Elumalai
- Actinobacterial Research Laboratory, Department of Microbiology, Periyar University, Salem, 636011, Tamil Nadu, India
| | - Siddharthan Nagarajan
- Actinobacterial Research Laboratory, Department of Microbiology, Periyar University, Salem, 636011, Tamil Nadu, India
| | - Sivarajan Anbalmani
- Actinobacterial Research Laboratory, Department of Microbiology, Periyar University, Salem, 636011, Tamil Nadu, India
| | - Sangeetha Murthy
- Actinobacterial Research Laboratory, Department of Microbiology, Periyar University, Salem, 636011, Tamil Nadu, India
| | - Radhakrishnan Manikkam
- Centre for Drug Discovery and Development, Sathyabama Institute of Science and Technology, Chennai, 600119, Tamil Nadu, India
| | - Balagurunathan Ramasamy
- Actinobacterial Research Laboratory, Department of Microbiology, Periyar University, Salem, 636011, Tamil Nadu, India.
| |
Collapse
|
2
|
Yu Y, Wang Z, Xiong D, Zhou L, Kong F, Wang Q. New Secondary Metabolites of Mangrove-Associated Strains. Mar Drugs 2024; 22:372. [PMID: 39195488 DOI: 10.3390/md22080372] [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: 07/20/2024] [Revised: 08/15/2024] [Accepted: 08/15/2024] [Indexed: 08/29/2024] Open
Abstract
Positioned at the dynamic interface between terrestrial and marine realms, mangroves embody a vibrant tapestry of biodiversity, encompassing an array of plants, animals, and microorganisms. These microbial inhabitants of mangrove habitats have emerged as a pivotal resource for antimicrobials and a plethora of pharmaceutically valuable compounds, spanning enzymes, antineoplastic agents, pesticides, immunosuppressants, and immunomodulators. This review delves into the recent landscape (January 2021 to May 2024, according to the time of publication) of novel secondary metabolites isolated from mangrove-associated microorganisms, analyzing 41 microbial strains that collectively yielded 165 distinct compounds. Our objective is to assess the productivity and potential of natural products derived from microbial populations within mangrove ecosystems in recent times. Notably, fungi stand out as the preeminent contributors to the emergence of these novel natural products, underscoring their pivotal role in the bioprospecting endeavors within these unique environments.
Collapse
Affiliation(s)
- Yunxia Yu
- Department of Pediatric Intensive Care Medicine, Hainan Women and Children's Medical Center, Haikou 570206, China
- Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning 530006, China
| | - Zimin Wang
- Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning 530006, China
| | - Dingmi Xiong
- Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning 530006, China
| | - Liman Zhou
- Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning 530006, China
| | - Fandong Kong
- Key Laboratory of Chemistry and Engineering of Forest Products, State Ethnic Affairs Commission, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products, Guangxi Minzu University, Nanning 530006, China
| | - Qi Wang
- Department of Pediatric Intensive Care Medicine, Hainan Women and Children's Medical Center, Haikou 570206, China
| |
Collapse
|
3
|
Charousová I, Hlebová M, Hleba L, Medo J, Wink J. Streptomyces iakyrus TA 36 as First-Reported Source of Quinone Antibiotic γ-Rubromycin. Molecules 2023; 28:5977. [PMID: 37630229 PMCID: PMC10458949 DOI: 10.3390/molecules28165977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/04/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023] Open
Abstract
A wide range of bioactive compounds with potential medical applications are produced by members of the genus Streptomyces. A new actinomycete producer of the antibiotic γ-rubromycin, designated TA 36, was isolated from an alpine soil sample collected in Peru (Machu Picchu). Morphological, physiological and biochemical characteristics of the strain, together with data obtained via phylogenetic analysis and MALDI-TOF MS, were used for the correct identification of the isolate. The isolate TA 36 showed morphological characteristics that were consistent with its classification within the genus Streptomyces. Phylogenetic analysis based on 16S rRNA gene sequences showed that the TA 36 strain was most similar to S. iakyrus and S. violaceochromogenes with 99% similarity. Phylogenetic analysis together with the profile of whole cell proteins indicated that the strain tested could be identified as S. iakyrus TA 36. The crude extract Ext.5333.TA 36 showed various effects against the tested organisms with strong antimicrobial activity in the growth of Staphylococcus aureus (Newman) (MIC value of 0.00195 µg/µL). HPLC fractionation and LC/MS analysis of the crude extract led to the identification of the quinone antibiotic γ-rubromycin, a promising antitumour and antibacterial antibiotic. To the best of our knowledge, there is currently no report on the production of γ-rubromycin by S. iakyrus. Therefore, this study suggests S. iakyrus TA 36 as the first-reported source of this unique bioactive secondary metabolite.
Collapse
Affiliation(s)
- Ivana Charousová
- Clinical Microbiology Laboratory, Unilabs Slovensko, s.r.o., J. Bellu 66, SK-03495 Likavka, Slovakia;
- Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture, Nitra, Tr. A. Hlinku 2, SK-94976 Nitra, Slovakia
| | - Miroslava Hlebová
- Department of Biology, Faculty of Natural Sciences, University of SS. Cyril and Methodius, Nám. J. Herdu 2, SK-91701 Trnava, Slovakia
| | - Lukas Hleba
- Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture, Nitra, Tr. A. Hlinku 2, SK-94976 Nitra, Slovakia
| | - Juraj Medo
- Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture, Nitra, Tr. A. Hlinku 2, SK-94976 Nitra, Slovakia
| | - Joachim Wink
- Microbial Strain Collection Group, Helmholtz Centre for Infection Research, Inhoffenstrasse 7, 38124 Braunschweig, Germany
| |
Collapse
|
4
|
Ashwin RK, Aruna A, Koyyodan J, Kaari M, Venugopal G, Manikkam R. Exploration of fish gut-associated actinobacteria for its antifouling activity. J Basic Microbiol 2023. [PMID: 37127854 DOI: 10.1002/jobm.202300051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 04/03/2023] [Accepted: 04/13/2023] [Indexed: 05/03/2023]
Abstract
An attempt has been made to screen the fish gut-associated actinobacterial cultures for antifouling compounds. Fifteen morphologically distinct bacterial cultures were recovered from the biofouling samples scraped from the boat surfaces and other maritime structures in the Kovalam beach (Lat. 12.7870°N; Long. 80.2504°E) coastal areas in Tamil Nadu, India. All the bacterial isolates were identified at generic level from which two isolates namely KB6 and KB7 as Staphylococcus sp. were found the exhibit strong biofilm formation. Four actinobacterial strains viz., IM20, PYA9, F8, and SQA4 were evaluated for inhibitory properties against biofouling bacteria using the agar plug method. Strain IM20 which strongly inhibited the biofouling bacteria was chosen as prospective strain for further studies. When compared to submerged fermentation, IM20 produced a high amount of antifouling chemicals on the agar surface fermentation. Among the solvents tested, better extraction of antifouling compounds was seen in ethyl acetate extract. Antifouling compound production by the strain IM20 was found to be influenced by a number of variables such as glucose, fructose, glutamine, malt extract, pH 7 and 9, temperature 30 and 40° C and NaCl at 2.5% and 5% concentrations. Gas chromatography-mass spectrometry (GC-MS) analysis of the strain IM20 extract revealed the presence of pyrrolo (1,2-a]pyrazine-1,4-dione, hexahydro) in significant amount. In the present study, the fish gut-associated Streptomyces sp. IM20 was identified as an unusual and newly added source for the isolation of antifouling compounds.
Collapse
Affiliation(s)
- Ramesh K Ashwin
- Department of Biotechnology, Madha Engineering College, Kundrathur, Chennai, India
| | - Arunachalam Aruna
- Department of Biotechnology, Madha Engineering College, Kundrathur, Chennai, India
| | - Jisha Koyyodan
- Department of Microbiology, Vels Institute of Science, Technology and Advanced Studies, Chennai, India
| | - Manigundan Kaari
- Centre for Drug Discovery and Development, Sathyabama Institute for Science and Technology, Chennai, India
| | - Gopikrishnan Venugopal
- Centre for Drug Discovery and Development, Sathyabama Institute for Science and Technology, Chennai, India
| | - Radhakrishnan Manikkam
- Centre for Drug Discovery and Development, Sathyabama Institute for Science and Technology, Chennai, India
| |
Collapse
|
5
|
Srinivasan R, Kannappan A, Shi C, Lin X. Marine Bacterial Secondary Metabolites: A Treasure House for Structurally Unique and Effective Antimicrobial Compounds. Mar Drugs 2021; 19:md19100530. [PMID: 34677431 PMCID: PMC8539464 DOI: 10.3390/md19100530] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 09/12/2021] [Accepted: 09/15/2021] [Indexed: 02/06/2023] Open
Abstract
The prevalence of antimicrobial resistance reduces the effectiveness of antimicrobial drugs in preventing and treating infectious diseases caused by pathogenic organisms, such as bacteria, fungi, and viruses. Because of the burgeoning growth of microbes with antimicrobial-resistant traits, there is a dire need to identify and develop novel and effective antimicrobial agents to treat infections from antimicrobial-resistant strains. The marine environment is rich in ecological biodiversity and can be regarded as an untapped resource for prospecting novel bioactive compounds. Therefore, exploring the marine environment for antimicrobial agents plays a significant role in drug development and biomedical research. Several earlier scientific investigations have proven that bacterial diversity in the marine environment represents an emerging source of structurally unique and novel antimicrobial agents. There are several reports on marine bacterial secondary metabolites, and many are pharmacologically significant and have enormous promise for developing effective antimicrobial drugs to combat microbial infections in drug-resistant pathogens. In this review, we attempt to summarize published articles from the last twenty-five years (1996–2020) on antimicrobial secondary metabolites from marine bacteria evolved in marine environments, such as marine sediment, water, fauna, and flora.
Collapse
Affiliation(s)
- Ramanathan Srinivasan
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Crop Ecology and Molecular Physiology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Correspondence: (R.S.); (X.L.)
| | - Arunachalam Kannappan
- State Key Laboratory of Microbial Metabolism, MOST-USDA Joint Research Center for Food Safety, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (A.K.); (C.S.)
| | - Chunlei Shi
- State Key Laboratory of Microbial Metabolism, MOST-USDA Joint Research Center for Food Safety, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China; (A.K.); (C.S.)
| | - Xiangmin Lin
- Fujian Provincial Key Laboratory of Agroecological Processing and Safety Monitoring, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Crop Ecology and Molecular Physiology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- Correspondence: (R.S.); (X.L.)
| |
Collapse
|
6
|
Carbapenemases producing Klebsiella pneumoniae from the pus of hospitalized patients: In-vitro antibiotic properties of Streptomyces against multidrug resistant infectious bacteria. J Infect Public Health 2021; 14:892-897. [PMID: 34119841 DOI: 10.1016/j.jiph.2021.05.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 05/10/2021] [Accepted: 05/18/2021] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Klebsiella pneumoniae is predominantly exists in the pus of the human wounds and it creates massive infections in the skin and causes serious health associated infections. Modern antibiotics are highly active in the treatment of wound infections. In this study was aimed to determine resistance of K. pneumoniae screened from wound specimens of patients. Sample was collected from the pus of the patients associated with secondary infection. METHODS Samples were serially diluted and the isolated bacterial strains were characterized by biochemical tests, colony morphology and Gram's staining methods. Resistance of K. pneumoniae was tested using antibiotics such as, Gentamycin, Ampicillin, Tetracycline, Cefurooxime, Oxacillin, Ofloxacin, Erythromycin, Nalidic acid, Cefepine, Piperacillin, Norfloxacin, Imipenem, Nitrofurantoin, Amikacin, Ciprofloxacin, Vancomycin, Meropeneum and Cefotaxime with Kirby-Bauer disc diffusion method. RESULTS Among the 73 K. pneumoniae strains, four strains produced AmpC and ESBLs, 42 strains produced ESBLs and 7 bacterial strains synthesized only AmpC enzyme. Four stains produced ESBLs and showed multidrug resistance against various antibiotics. Most of the strains synthesized extracellular polysaccharides and mediated biofilm formation. Among the K. pneumoniae strains, K. pneumoniae PS02 showed multidrug resistant against most of the tested antibiotics. It produced ESBLs and AmpC enzyme. To produce secondary metabolites, actinomycetes were isolated and characterized as Streptomyces sp. AC14. The secondary metabolite was effective against Klebsiella strains. CONCLUSIONS To conclude, secondary metabolites extracted from Streptomyces sp. AC14 was found to be effective against multidrug resistant bacterium. Further studies are warranted to analyze the drug hydrolyzing pathways of bacteria and to identify the mechanism of action of secondary metabolites from Streptomyces sp. AC14.
Collapse
|
7
|
Fu G, Wang R, Ding J, Qi H, Zhao Z, Chen C, Zhang H, Xue Z, Wang J, Wu M. Micromonospora zhangzhouensis sp. nov., a Novel Actinobacterium Isolated from Mangrove Soil, Exerts a Cytotoxic Activity in vitro. Sci Rep 2020; 10:3889. [PMID: 32127574 PMCID: PMC7054543 DOI: 10.1038/s41598-020-60677-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 02/13/2020] [Indexed: 11/21/2022] Open
Abstract
A new bacterial strain, designated HM134T, was isolated from a sample of soil collected from a Chinese mangrove Avicennia marina forest. Assessed by a polyphasic approach, the taxonomy of strain HM134T was found to be associated with a range of phylogenetic and chemotaxonomic properties consistent with the genus Micromonospora. Phylogenetic analysis based on the 16s rRNA gene sequence indicated that strain HM134T formed a distinct lineage with the most closely related species, including M. rifamycinica AM105T, M. wenchangensis CCTCC AA 2012002T and M. mangrovi 2803GPT1-18T. The ANI values between strain HM134T and the reference strains ranged from 82.6% to 95.2%, which was below the standard criteria for classifying strains as the same species (96.5%). Strain HM134T and related species shared in silico dDDH similarities values below the recommended 70% cut-off for the delineation of species (range from 25.7–62.6%). The DNA G+C content of strain HM134T was 73.2 mol%. Analysis of phylogenetic, genomic, phenotypic and chemotaxonomic characteristics revealed that strain HM134T is considered to represent a novel species of the genus Micromonospora, for which the name M. zhangzhouensis sp. nov. is proposed. The extract of strain HM134T was demonstrated to exhibit cytotoxic activity against the human cancer cell lines HepG2, HCT-116 and A549. Active substance presented in the fermentation broth of strain HM134T was isolated by bioassay-guided analysis and purified afterwards. A new derivative of diterpenoid was identified through electrospray ionizing mass spectrometry (MS) and nuclear magnetic resonance (NMR). The compound showed different cytotoxic activities against cancer cells, with the highest cytotoxicity against HCT-116, corresponding to IC50 value of 38.4 μg/mL.
Collapse
Affiliation(s)
- Geyi Fu
- Ocean College, Zhejiang University, Zhoushan, China
| | - Ruijun Wang
- Ocean College, Zhejiang University, Zhoushan, China
| | - Jinglin Ding
- Zhoushan Tourism & Health College, Zhoushan, China
| | - Huan Qi
- Zhejiang Key Laboratory of Antifungal Drugs, Zhejiang Hisun Pharmaceutical Co., Ltd., Taizhou, China
| | - Zhe Zhao
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Can Chen
- Ocean College, Zhejiang University, Zhoushan, China
| | - Hui Zhang
- Zhejiang Key Laboratory of Antifungal Drugs, Zhejiang Hisun Pharmaceutical Co., Ltd., Taizhou, China.,College of Biochemical Engineering, Anhui Polytechnic University, Wuhu, China
| | - Zhenglian Xue
- College of Biochemical Engineering, Anhui Polytechnic University, Wuhu, China
| | - Jidong Wang
- Zhejiang Key Laboratory of Antifungal Drugs, Zhejiang Hisun Pharmaceutical Co., Ltd., Taizhou, China. .,College of Biochemical Engineering, Anhui Polytechnic University, Wuhu, China.
| | - Min Wu
- Ocean College, Zhejiang University, Zhoushan, China. .,College of Life Sciences, Zhejiang University, Hangzhou, China.
| |
Collapse
|
8
|
Hui C, Jiang H, Liu B, Wei R, Zhang Y, Zhang Q, Liang Y, Zhao Y. Chitin degradation and the temporary response of bacterial chitinolytic communities to chitin amendment in soil under different fertilization regimes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 705:136003. [PMID: 31846813 DOI: 10.1016/j.scitotenv.2019.136003] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 10/20/2019] [Accepted: 12/06/2019] [Indexed: 06/10/2023]
Abstract
Chitin amendment is a promising agricultural management strategy to control fungal and nematodal plant diseases and to improve crop yield. Chitin degradation in the soil contributes significantly to carbon and nitrogen cycling in terrestrial ecosystems. However, little is known about chitin degradation and bacterial chitinolytic communities in agricultural soil under different fertilization regimes. Thus, in the present study, a 42-day soil incubation experiment was conducted, in which soil under four fertilization regimes (i.e., no fertilization (CK), chemical fertilizer (CF), pig manure plus 50% chemical fertilizer (PMCF), and rice straw plus 100% chemical fertilizer (SRCF)) were amended or not with chitin or its monomer, N-acetylglucosamine (NAG). Different nitrogen forms and CO2 and N2O emission were measured to evaluate chitin degradation and its environmental implications. SRCF soil had the highest CO2 emission, chitin N mineralization, and fungal abundance. NAG and chitin were enriched to exploit the chitin degraders. High-throughput sequencing analyses reveled that Streptomycetaceae, Oxalobacteraceae, Gemmatimonadaceae, and Acidobacteria were generally increased upon chitin amendment in CK, CF, and PMCF soil, whereas Streptomycetaceae dominated chitin-amended SRCF soil. Herpetosiphonaceae was enriched only in chitin-amended CK soil. LEfSe and network analysis were used to predict chitinolytic and opportunistic species, and revealed that most previously reported chitinolytic bacteria were detected in the present study and new potential chitin degraders, including unidentified_Solibacterales, Gemmatimonadaceae, and Herpetosiphonaceae, were identified. Some members of Firmicutes, Actinobacteria, and Proteobacteria, including Bacillus, and Kitasatospora, were speculated to be opportunistic species. The findings improve our understanding of the effects of chitin degradation on carbon and nitrogen cycling in agricultural soil under different fertilization regimes and help to identify chitinolytic bacteria.
Collapse
Affiliation(s)
- Cai Hui
- Institute of Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hui Jiang
- Institute of Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Bing Liu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ran Wei
- Institute of Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yiping Zhang
- Institute of Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Qichun Zhang
- Ministry of Education Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yongchao Liang
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, Zhejiang University, Hangzhou 310058, China
| | - Yuhua Zhao
- Institute of Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou 310058, China.
| |
Collapse
|
9
|
Isolation, characterization and identification of antibiofouling metabolite from mangrove derived Streptomyces sampsonii PM33. Sci Rep 2019; 9:12975. [PMID: 31506555 PMCID: PMC6736841 DOI: 10.1038/s41598-019-49478-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 07/22/2019] [Indexed: 11/08/2022] Open
Abstract
In this study, we report the production, bioassay guided isolation and identification of antibiofouling metabolite from mangrove derived actinobacterium, Streptomyces sampsonii (PM33). The actinobacterial strain PM33 yields maximum amount of antifouling compounds through agar surface fermentation. In optimization, carbohydrates such as glucose, fructose and xylose, are suitable for maximum production of the active compound. In addition, other compounds such as malt extract, glutamine, and sodium chloride concentrations (2.5, 5 and 7.5%) and parameters such as pH 7.0 and temperature range 30 °C to 40 °C enhanced the production of antifouling metabolite. The antifouling metabolite was extracted in ethyl acetate. TLC and bioautography was used to separate and detect the antifouling metabolite present in the crude extract. The physico chemical features revealed that the antifouling metabolite PM33 – B as taxifolin (C15H12O7). The purified taxifolin was found to be active against biofouling bacteria, algal spore germination and mollusc foot adherence, respectively. Toxicity nature of taxifolin was also determined by adopting zebrafish embryos. The taxifolin isolated from mangrove-derived Streptomyces sampsonii PM33 is a promising candidate for the development of eco-friendly antifouling preparation.
Collapse
|
10
|
Mehetre GT, J S V, Burkul BB, Desai D, B S, Dharne MS, Dastager SG. Bioactivities and molecular networking-based elucidation of metabolites of potent actinobacterial strains isolated from the Unkeshwar geothermal springs in India. RSC Adv 2019; 9:9850-9859. [PMID: 35520740 PMCID: PMC9062624 DOI: 10.1039/c8ra09449g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 03/15/2019] [Indexed: 02/03/2023] Open
Abstract
The bioactive potential of Actinobacteria endemic to hot springs has rarely been investigated. This study highlights the cultivable diversity and bioactivities of Actinobacteria associated with the Unkeshwar hot springs, India. Potent strains were evaluated for their biosynthetic potentials and metabolite analysis was performed using effective dereplication molecular networking tools. A total of 86 actinobacterial strains were isolated and grouped into 21 distinct genera, based on 16S rRNA gene sequence analysis. These strains included rare members such as Micromonospora, Marmoricola, Actinomadura, Cellulomonas, Cellulosimicrobium, Janibacter, Rothia, Barrentisimonas, Dietzia and Glycomyces. In antimicrobial screening, Micromonospora sp. strain GH99 and Streptomyces sp. strain GH176 were found to be potent antimicrobial strains. The metabolic extracts of these strains exhibited strong antimicrobial activity against Staphylococcus epidermidis (NCIM 2493), Shigella flexneri (NCIM 5265), Klebsiella pneumonia (NCIM 2098), and Salmonella abony (NCIM 2257). The extracts also displayed strong anti-biofilm and anticancer activities against Pseudomonas aeruginosa (NCIM 5029), Acinetobacter junii (NCIM 5188) and breast cancer cell line MCF7, respectively. Both strains also tested positive for the presence of the PKS biosynthetic gene cluster in their genomes. To effectively delineate the secondary metabolites, the extracts were subjected to MS/MS-guided molecular networking analysis. Structurally diverse compounds including the polyketides 22-dehydroxymethyl-kijanolide (GH99 strain) and Abyssomicin I (GH176 strain) were detected in the extracts. Interestingly, Brevianamide F was detected in the extract of Micromonospora, which has previously been mostly found in fungal species. Other compounds such as cyclic tripeptides, Cyclo(l-Pro-d-Ile) and Cyclo(d-Pro-l-Phe), were also identified in this strain. In summary, for the first time, we explored the diversity of Actinobacteria and evaluated their bioactive potential from the Unkeshwar hot springs. The potent strains isolated in the study could be useful in drug discovery programs. The bioactive potential of Actinobacteria endemic to hot springs has rarely been investigated.![]()
Collapse
Affiliation(s)
- Gajanan T Mehetre
- NCIM Resource Centre, CSIR-National Chemical Laboratory Pune India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
| | - Vinodh J S
- NCIM Resource Centre, CSIR-National Chemical Laboratory Pune India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
| | - Bhushan B Burkul
- Centre for Materials Characterization, CSIR-National Chemical Laboratory Pune India
| | - D Desai
- National Center for Nanoscience and Nanotechnology, University of Mumbai India
| | - Santhakumari B
- Centre for Materials Characterization, CSIR-National Chemical Laboratory Pune India
| | - Mahesh S Dharne
- NCIM Resource Centre, CSIR-National Chemical Laboratory Pune India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
| | - Syed G Dastager
- NCIM Resource Centre, CSIR-National Chemical Laboratory Pune India .,Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
| |
Collapse
|
11
|
Charousová I, Medo J, Hleba L, Císarová M, Javoreková S. Antimicrobial activity of actinomycetes and characterization of actinomycin-producing strain KRG-1 isolated from Karoo, South Africa. BRAZ J PHARM SCI 2019. [DOI: 10.1590/s2175-97902019000217249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Ivana Charousová
- Apha medical s.r.o., Slovak Republic; Slovak University of Agriculture in Nitra, Slovak Republic
| | - Juraj Medo
- Slovak University of Agriculture in Nitra, Slovak Republic
| | - Lukáš Hleba
- Slovak University of Agriculture in Nitra, Slovak Republic
| | | | | |
Collapse
|
12
|
Bibi F, Strobel GA, Naseer MI, Yasir M, Khalaf Al-Ghamdi AA, Azhar EI. Microbial Flora Associated with the Halophyte- Salsola imbricate and Its Biotechnical Potential. Front Microbiol 2018; 9:65. [PMID: 29445362 PMCID: PMC5797760 DOI: 10.3389/fmicb.2018.00065] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/11/2018] [Indexed: 11/17/2022] Open
Abstract
Halophytes are associated with the intertidal forest ecosystem of Saudi Arabia and seemingly have an immense potential for yielding useful and important natural products. In this study we have aimed to isolate and characterize the endophytic and rhizospheric bacterial communities from the halophyte, Salsola imbricata, In addition these bacterial strains were identified and selected strains were further studied for bioactive secondary metabolites. At least 168 rhizspheric and endophytic bacteria were isolated and of these 22 were active antagonists against the oomycetous fungal plant pathogens, Phytophthora capsici and Pythium ultimum. Active cultures were mainly identified with molecular techniques (16S r DNA) and this revealed 95.7–100% sequence similarities with relevant type strains. These microorgansims were grouped into four major classes: Actinobacteria, Firmicutes, β-Proteobacteria, and γ-Proteobacteria. Production of fungal cell wall lytic enzymes was detected mostly in members of Actinobacteria and Firmicutes. PCR screening for type I polyketide synthases (PKS-I), type II polyketide synthases (PKS-II) and nonribosomal peptide synthetases (NRPS) revealed 13 of the 22 strains (59%) were positive for at least one of these important biosynthetic genes that are known to be involved in the synthesis of important antibiotics. Four bacterial strains of Actinobacteria with potential antagonistic activity including two rhizobacteria, EA52 (Nocardiopsis sp.), EA58 (Pseudonocardia sp.) and two endophytic bacteria Streptomyces sp. (EA65) and Streptomyces sp. (EA67) were selected for secondary metabolite analyses using LC-MS. As a result, the presence of different bioactive compounds in the culture extracts was detected some of which are already reported for their diverse biological activities including antibiotics such as Sulfamethoxypyridazine, Sulfamerazine, and Dimetridazole. In conclusion, this study provides an insight into antagonistic bacterial population especially the Actinobacteria from S. imbricata, producing antifungal metabolites of medical significance and characterized taxonomically in future.
Collapse
Affiliation(s)
- Fehmida Bibi
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Gary A Strobel
- Department of plant sciences, Montana State University, Bozeman, MT, United States
| | - Muhammad I Naseer
- Center of Excellence in Genomic Medicine Research, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Muhammad Yasir
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ahmed A Khalaf Al-Ghamdi
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Esam I Azhar
- Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| |
Collapse
|
13
|
Gopikrishnan V, Radhakrishnan M, Shanmugasundaram T, Pazhanimurugan R, Balagurunathan R. Antibiofouling potential of quercetin compound from marine-derived actinobacterium, Streptomyces fradiae PE7 and its characterization. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:13832-13842. [PMID: 27032633 DOI: 10.1007/s11356-016-6532-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 03/21/2016] [Indexed: 06/05/2023]
Abstract
An attempt has been made to isolate, purify and characterize antifouling compound from Streptomyces fradiae PE7 isolated from Vellar estuarine sediment, Parangipettai, South India. The microbial identification was done at species level based on its phenotypic, cell wall and molecular characteristics. Strain PE7 produced high quantity of antifouling compounds in agar surface fermentation when compared to submerged fermentation. In fermentation optimization, wide range of sugars, amino acids, minerals, pH, temperature and NaCl concentration was found to influence the antifouling compound production from the strain PE7. Antifouling compound PE7-C was purified from the crude extract by preparative TLC, and its activity against biofouling bacteria was confirmed by bioautography. Based on the physico-chemical characteristics, the chemical structure of the antifouling compound PE7-C was identified as quercetin (C15H10O7), a flavonoid class of compound with the molecular weight 302.23 g/mol. The purified quercetin was active against 18 biofouling bacteria with MIC range between 1.6 and 25 μg/ml, algal spore germination and mollusc foot adherence found at 100 μg/ml and 306 ± 19.6 μg ml(-1) respectively. The present study, for the first time, reported quercetin from marine-derived Streptomyces sp. PE7 with antifouling activity. This also leads to the repurposing of quercetin for the development of antifouling agent.
Collapse
Affiliation(s)
- Venugopal Gopikrishnan
- Centre for Drug Discovery and Development, Sathyabama University, Jeppiar Nagar, Chennai, 600 119, Tamil Nadu, India
| | - Manikkam Radhakrishnan
- Centre for Drug Discovery and Development, Sathyabama University, Jeppiar Nagar, Chennai, 600 119, Tamil Nadu, India
| | - Thangavel Shanmugasundaram
- Actinobacterial Research Laboratory, Department of Microbiology, Periyar University, Periyar Palkalai Nagar, Salem, 636 011, Tamil Nadu, India
| | - Raasaiyah Pazhanimurugan
- Actinobacterial Research Laboratory, Department of Microbiology, Periyar University, Periyar Palkalai Nagar, Salem, 636 011, Tamil Nadu, India
| | - Ramasamy Balagurunathan
- Actinobacterial Research Laboratory, Department of Microbiology, Periyar University, Periyar Palkalai Nagar, Salem, 636 011, Tamil Nadu, India.
| |
Collapse
|
14
|
Rathore SS, Ramamurthy V, Allen S, Selva Ganesan S, Ramakrishnan J. Novel approach of adaptive laboratory evolution: triggers defense molecules in Streptomyces sp. against targeted pathogen. RSC Adv 2016. [DOI: 10.1039/c6ra15952d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Adaptive laboratory evolution by competition-based co-culture: triggers and enhance specific bioactive molecules against targeted pathogen.
Collapse
Affiliation(s)
- Sudarshan Singh Rathore
- Centre for Research in Infectious Diseases (CRID)
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur
- India – 613401
| | - Vigneshwari Ramamurthy
- Centre for Research in Infectious Diseases (CRID)
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur
- India – 613401
| | - Sally Allen
- Centre for Research in Infectious Diseases (CRID)
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur
- India – 613401
| | - S. Selva Ganesan
- Department of Chemistry
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur-613401
- India
| | - Jayapradha Ramakrishnan
- Centre for Research in Infectious Diseases (CRID)
- School of Chemical and Biotechnology
- SASTRA University
- Thanjavur
- India – 613401
| |
Collapse
|
15
|
Kurtböke Dİ. Applied Microbiology and Biotechnology teaching tailored towards regional needs and graduate employment. MICROBIOLOGY AUSTRALIA 2016. [DOI: 10.1071/ma16023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The University of the Sunshine Coast (USC) opened in 1996 and since 1999 held the full university status as well as being the first ‘Greenfield’ university to open in Australia since 1971 (https://my.usc.edu.au/). This status was in line with its mission to become an institution with strong emphasis on sustainability and environmentally friendly regional development while transforming a former cane farm into today’s multi award-winning modern and distinctive sub-tropical architectural structure. Over the past 20 years the university has played a role as an ‘urban catalyst’ in one of the rapidly growing and transforming regions of Australia with a foundational mission statement: ‘To be the major catalyst for the academic cultural and economic advancement of the region: by leadership; by pursuit of international standards in teaching and research; and by responsiveness to the needs of students, staff, community and the environment’.
Collapse
|
16
|
Characterization of a potential β-lactamase inhibitory metabolite from a marine Streptomyces sp. PM49 active against multidrug-resistant pathogens. Appl Biochem Biotechnol 2015; 175:3696-708. [PMID: 25737024 DOI: 10.1007/s12010-015-1538-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 02/06/2015] [Indexed: 10/23/2022]
Abstract
Actinobacteria is a prolific producer of complex natural products; we isolated a potential marine Streptomyces sp. PM49 strain from Bay of Bengal coastal area of India. The strain PM49 exhibited highly efficient antibacterial properties on multidrug-resistant pathogens with a zone of inhibition of 14-17 mm. SSF was adopted for the production of the secondary metabolites from PM49 with ISP2; utilizing agricultural wastes for compound extraction was also attempted. Bioactive fraction of Rf value 0.69 resolved using chloroform and ethyl acetate (1:1, v/v) was obtained and subjected to further analysis. Based on UV, IR, ESI-MS, and (1)H and (13)C NMR spectral analysis, it was revealed that the compound is closely similar to cyslabdan with a molecular mass of 467.66 corresponding to the molecular formula C25H41NO5S. ESBL and MBL production was screened in the hospital test isolates of Pseudomonas aeruginosa, Acinetobacter baumannii, Klebsiella pneumoniae, and Staphylococcus aureus. PCR amplification in the phenotypically positive strains was positive for bla IMP, bla SHV, bla CTX-M, and mec genes. The β-lactamase enzyme from tested strains had cephalosporinase activity with a 31-kDa protein and isolated compound from the strain possessing β-lactamase inhibitory potential. MIC of the active fraction was 16-32 μg/ml on ATCC strains; the ceftazidime and meropenem sensitive and resistant test strains showed MIC of 64-256 μg/ml. The Streptomyces sp. PM49 aerial mycelium was rectiflexibile; the 16S rRNA showed 99 % identity with Streptomyces rochei and submitted at Genbank with accession no JX904061.1.
Collapse
|
17
|
Jami M, Ghanbari M, Kneifel W, Domig KJ. Phylogenetic diversity and biological activity of culturable Actinobacteria isolated from freshwater fish gut microbiota. Microbiol Res 2015; 175:6-15. [PMID: 25662514 DOI: 10.1016/j.micres.2015.01.009] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 01/14/2015] [Accepted: 01/18/2015] [Indexed: 01/25/2023]
Abstract
The diversity of Actinobacteria isolated from the gut microbiota of two freshwater fish species namely Schizothorax zarudnyi and Schizocypris altidorsalis was investigated employing classical cultivation techniques, repetitive sequence-based PCR (rep-PCR), partial and full 16S rDNA sequencing followed by phylogenetic analysis. A total of 277 isolates were cultured by applying three different agar media. Based on rep-PCR profile analysis a subset of 33 strains was selected for further phylogenetic investigations, antimicrobial activity testing and diversity analysis of secondary-metabolite biosynthetic genes. The identification based on 16S rRNA gene sequencing revealed that the isolates belong to eight genera distributed among six families. At the family level, 72% of the 277 isolates belong to the family Streptomycetaceae. Among the non-streptomycetes group, the most dominant group could be allocated to the family of Pseudonocardiaceae followed by the members of Micromonosporaceae. Phylogenetic analysis clearly showed that many of the isolates in the genera Streptomyces, Saccharomonospora, Micromonospora, Nocardiopsis, Arthrobacter, Kocuria, Microbacterium and Agromyces formed a single and distinct cluster with the type strains. Notably, there is no report so far about the occurrence of these Actinobacteria in the microbiota of freshwater fish. Of the 33 isolates, all the strains exhibited antibacterial activity against a set of tested human and fish pathogenic bacteria. Then, to study their associated potential capacity to synthesize diverse bioactive natural products, diversity of genes associated with secondary-metabolite biosynthesis including PKS I, PKS II, NRPS, the enzyme PhzE of the phenazine pathways, the enzyme dTGD of 6-deoxyhexoses glycosylation pathway, the enzyme Halo of halogenation pathway and the enzyme CYP in polyene polyketide biosynthesis were investigated among the isolates. All the strains possess at least two types of the investigated biosynthetic genes, one-fourth of them harbours more than four. This study demonstrates the significant diversity of Actinobacteria in the fish gut microbiota and it's potential to produce biologically active compounds.
Collapse
Affiliation(s)
- Mansooreh Jami
- BOKU - University of Natural Resources and Life Sciences, Department of Food Science and Technology, Institute of Food Science, Muthgasse 18, A-1190 Vienna, Austria.
| | - Mahdi Ghanbari
- BOKU - University of Natural Resources and Life Sciences, Department of Food Science and Technology, Institute of Food Science, Muthgasse 18, A-1190 Vienna, Austria; University of Zabol, Faculty of Natural Resources, Department of Fisheries, Zabol, Iran
| | - Wolfgang Kneifel
- BOKU - University of Natural Resources and Life Sciences, Department of Food Science and Technology, Institute of Food Science, Muthgasse 18, A-1190 Vienna, Austria
| | - Konrad J Domig
- BOKU - University of Natural Resources and Life Sciences, Department of Food Science and Technology, Institute of Food Science, Muthgasse 18, A-1190 Vienna, Austria
| |
Collapse
|
18
|
Antimicrobial and Biocatalytic Potential of Haloalkaliphilic Actinobacteria. SUSTAINABLE DEVELOPMENT AND BIODIVERSITY 2015. [DOI: 10.1007/978-3-319-14595-2_2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
19
|
Duncan K, Haltli B, Gill KA, Kerr RG. Bioprospecting from marine sediments of New Brunswick, Canada: exploring the relationship between total bacterial diversity and actinobacteria diversity. Mar Drugs 2014; 12:899-925. [PMID: 24531187 PMCID: PMC3944522 DOI: 10.3390/md12020899] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 01/07/2014] [Accepted: 01/21/2014] [Indexed: 12/16/2022] Open
Abstract
Actinomycetes are an important resource for the discovery of natural products with therapeutic properties. Bioprospecting for actinomycetes typically proceeds without a priori knowledge of the bacterial diversity present in sampled habitats. In this study, we endeavored to determine if overall bacterial diversity in marine sediments, as determined by 16S rDNA amplicon pyrosequencing, could be correlated with culturable actinomycete diversity, and thus serve as a powerful tool in guiding future bioprospecting efforts. Overall bacterial diversity was investigated in eight marine sediments from four sites in New Brunswick, Canada, resulting in over 44,000 high quality sequences (x = 5610 per sample). Analysis revealed all sites exhibited significant diversity (H' = 5.4 to 6.7). Furthermore, statistical analysis of species level bacterial communities (D = 0.03) indicated community composition varied according to site and was strongly influenced by sediment physiochemical composition. In contrast, cultured actinomycetes (n = 466, 98.3% Streptomyces) were ubiquitously distributed among all sites and distribution was not influenced by sediment composition, suggesting that the biogeography of culturable actinomycetes does not correlate with overall bacterial diversity in the samples examined. These actinomycetes provide a resource for future secondary metabolite discovery, as exemplified by the antimicrobial activity observed from preliminary investigation.
Collapse
Affiliation(s)
- Katherine Duncan
- Department of Biomedical Sciences, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
| | - Bradley Haltli
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
| | - Krista A Gill
- Department of Chemistry, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
| | - Russell G Kerr
- Department of Biomedical Sciences, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.
| |
Collapse
|
20
|
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]
|
21
|
Gebreyohannes G, Moges F, Sahile S, Raja N. Isolation and characterization of potential antibiotic producing actinomycetes from water and sediments of Lake Tana, Ethiopia. Asian Pac J Trop Biomed 2013; 3:426-35. [PMID: 23730554 PMCID: PMC3644569 DOI: 10.1016/s2221-1691(13)60092-1] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Accepted: 04/02/2013] [Indexed: 10/27/2022] Open
Abstract
OBJECTIVE To isolate, evaluate and characterize potential antibiotic producing actinomycetes from water and sediments of Lake Tana, Ethiopia. METHODS A total of 31 strains of actinomycetes were isolated and tested against Gram positive and Gram negative bacterial strains by primary screening. In the primary screening, 11 promising isolates were identified and subjected to solid state and submerged state fermentation methods to produce crude extracts. The fermented biomass was extracted by organic solvent extraction method and tested against bacterial strains by disc and agar well diffusion methods. The isolates were characterized by using morphological, physiological and biochemical methods. RESULTS The result obtained from agar well diffusion method was better than disc diffusion method. The crude extract showed higher inhibition zone against Gram positive bacteria than Gram negative bacteria. One-way analysis of variance confirmed most of the crude extracts were statistically significant at 95% confidence interval. The minimum inhibitory concentration and minimum bactericidal concentration of crude extracts were 1.65 mg/mL and 3.30 mg/mL against Staphylococcus aureus, and 1.84 mg/mL and 3.80 mg/mL against Escherichia coli respectively. The growth of aerial and substrate mycelium varied in different culture media used. Most of the isolates were able to hydrolysis starch and urea; able to survive at 5% concentration of sodium chloride; optimum temperature for their growth was 30 °C. CONCLUSIONS The results of the present study revealed that freshwater actinomycetes of Lake Tana appear to have immense potential as a source of antibacterial compounds.
Collapse
Affiliation(s)
- Gebreselema Gebreyohannes
- Department of Biology, Faculty of Natural and Computational Sciences, Post Box 196, University of Gondar, Ethiopia
| | - Feleke Moges
- Department of Medical Microbiology, College of Medical and Health Sciences, Post Box 196, University of Gondar, Ethiopia
| | - Samuel Sahile
- Department of Biology, Faculty of Natural and Computational Sciences, Post Box 196, University of Gondar, Ethiopia
| | - Nagappan Raja
- Department of Biology, Faculty of Natural and Computational Sciences, Post Box 196, University of Gondar, Ethiopia
| |
Collapse
|
22
|
Ren J, Li L, Wei B, Tang YL, Deng ZX, Sun M, Hong K. Micromonospora wenchangensis sp. nov., isolated from mangrove soil. Int J Syst Evol Microbiol 2012. [PMID: 23178730 DOI: 10.1099/ijs.0.045476-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
An actinomycete, strain 2602GPT1-05(T), was isolated from a composite mangrove soil sample collected from Wenchang, Hainan province, China. Strain 2602GPT1-05(T) showed closest 16S rRNA gene sequence similarity to Micromonospora haikouensis 232617(T) (99.05 %), and phylogenetically clustered with Micromonospora haikouensis 232617(T), Micromonospora matsumotoense IMSNU 22003(T) (98.7 %) and Micromonospora rifamycinica AM105(T) (98.6 %) based on the 16S rRNA and gyrB gene sequence phylogenetic analysis. The strain harboured meso-DAP and glycine as major cell-wall amino acids, and MK-10(H6) and MK-9(H6) as predominant menaquinones. The characteristic whole-cell sugars were xylose, arabinose, glucose and galactose. The polar lipid profile comprised phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylinositol, phosphatidylglycerol, phosphatidylinositol mannosides, unknown phospholipid and an unknown phosphoglycolipid. The major cellular fatty acids were C18 : 1ω9c, iso-C15 : 0, 10-methyl C18 : 0 (tuberculostearic acid), C16 : 0, C18 : 0 and iso-C16 : 0. The DNA G+C content was 71.7 mol%. Furthermore, some physiological and biochemical properties and low DNA-DNA relatedness values enabled the strain to be differentiated from members of closely related species. On the basis of these phenotypic, genotypic and chemotaxonomic data, strain 2602GPT1-05(T) represents a novel species of the genus Micromonospora, for which the name Micromonospora wenchangensis sp. nov. is proposed. The type strain is 2602GPT1-05(T) ( = CCTCC AA 2012002(T) = DSM 45709(T)).
Collapse
Affiliation(s)
- Jian Ren
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China.,Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, PR China
| | - Lei Li
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, PR China
| | - Bin Wei
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, PR China
| | - Yi-Li Tang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, PR China
| | - Zi-Xin Deng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, PR China
| | - Ming Sun
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Kui Hong
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery (Wuhan University), Ministry of Education, and Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, PR China
| |
Collapse
|
23
|
Biodiversity and biotechnological potential of microorganisms from mangrove ecosystems: a review. ANN MICROBIOL 2012. [DOI: 10.1007/s13213-012-0442-7] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|
24
|
Nithya C, Pandian SK. Evaluation of bacterial diversity in Palk Bay sediments using terminal-restriction fragment length polymorphisms (T-RFLP). Appl Biochem Biotechnol 2012; 167:1763-77. [PMID: 22528645 DOI: 10.1007/s12010-012-9578-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Accepted: 01/19/2012] [Indexed: 11/24/2022]
Abstract
Although it is known that Palk Bay sediments harbor diverse and novel bacteria with important ecological and environmental functions, a comprehensive view of their molecular diversity is still lacking. In the present study, bacterial diversity in Palk Bay sediments was characterized using the molecular method terminal-restriction fragment length polymorphisms (T-RFLP). The bacterial assemblages detected by T-RFLP analysis revealed that the nearshore sediment harbored high number of bacterial count, whereas the 2.5-m sediment harbored diverse and distinct bacterial composition with fine heterogeneity. The major bacterial groups detected in all the three sediment samples were Actinobacteria, Bacteroidetes, Firmicutes, Proteobacteria (including alpha (α), gamma (γ), delta (δ), and epsilon (ε)-Proteobacteria), and uncultured bacteria. This is the first study that reveals the presence of Bacteroidetes, delta (δ)- and epsilon (ε)-Proteobacteria, and uncultured bacteria in Palk Bay sediments. The hitherto unexplored wide microbial diversity of Palk Bay coastal area was unraveled in the current study through culture-independent approach. These data suggest that the continued use of cultivation-independent techniques will undoubtedly lead to the discovery of additional bacterial diversity and provide a direct means to learn more about the ecophysiology and biotechnological potential of Palk Bay coastal area.
Collapse
Affiliation(s)
- Chari Nithya
- Department of Biotechnology, Alagappa University, Karaikudi 630 003, Tamil Nadu, India.
| | | |
Collapse
|
25
|
Bakkiyaraj D, Sivasankar C, Pandian SK. Inhibition of quorum sensing regulated biofilm formation in Serratia marcescens causing nosocomial infections. Bioorg Med Chem Lett 2012; 22:3089-94. [PMID: 22487181 DOI: 10.1016/j.bmcl.2012.03.063] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/04/2012] [Accepted: 03/16/2012] [Indexed: 11/18/2022]
Abstract
Serratia marcescens is an opportunistic pathogen causing severe urinary tract infections in hospitalized individuals. Infections of S. marcescens are of great concern because of its increasing resistance towards conventional antibiotics. Quorum sensing (QS)-a cell to cell communication-system of S. marcescens acts as a global regulator of almost all the virulence factors and majorly its biofilm formation. Since, the QS system of S. marcescens directly accords to its pathogenesis, targeting QS system will provide an improved strategy to combat drug resistant pathogens. In the present study, QS system of S. marcescens has been used as target and its inhibition has been studied upon exposure to bioactives from coral associated bacteria (CAB). This study also emphasises the potential of CAB in producing bioactive agents with anti-QS and antibiofilm properties. Two CAB isolates CAB 23 and 41 have shown to inhibit biofilm formation and the production of QS dependent virulence factors like prodigiosin, protease, lipase and swarming motility. The study, on the whole explicates the potential of QS system as a target to treat drug resistant bacterial infections.
Collapse
|
26
|
Hameş-Kocabaş EE, Uzel A. Isolation strategies of marine-derived actinomycetes from sponge and sediment samples. J Microbiol Methods 2012; 88:342-7. [PMID: 22285852 DOI: 10.1016/j.mimet.2012.01.010] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2011] [Revised: 01/10/2012] [Accepted: 01/11/2012] [Indexed: 10/14/2022]
Abstract
During the last two decades, discoveries of new members of actinomycetes and novel metabolites from marine environments have drawn attention to such environments, such as sediment and sponge. For the successful isolation of actinomycetes from marine environments, many factors including the use of enrichment and pre-treatment techniques, and the selection of growth media and antibiotic supplements should be taken into account. High-throughput cultivation is an innovative technique that mimics nature, eliminates undesired, fast-growing bacteria and creates suitable conditions for rare, slow-growing actinomycetes. This review comprehensively evaluates the traditional and innovative techniques and strategies used for the isolation of actinomycetes from marine sponge and sediment samples.
Collapse
Affiliation(s)
- E Esin Hameş-Kocabaş
- Department of Bioengineering, Faculty of Engineering, Ege University, 35100, Bornova, Izmir, Turkey.
| | | |
Collapse
|
27
|
Kumaran S, Deivasigamani B, Vairagkar U, Balamurugan S, Sakthivel M. Evaluation of Chitinase producing and antimicrobial properties of streptomyces isolated from shrimp shell disposable area. ASIAN PACIFIC JOURNAL OF TROPICAL DISEASE 2012. [DOI: 10.1016/s2222-1808(12)60280-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
28
|
Tiwari K, Gupta RK. Rare actinomycetes: a potential storehouse for novel antibiotics. Crit Rev Biotechnol 2011; 32:108-32. [DOI: 10.3109/07388551.2011.562482] [Citation(s) in RCA: 182] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
29
|
Phylogeny, phenotypic and nutritional characteristics of estuarine soil actinomycetes having broad-spectrum antimicrobial activity derived from an ecologically guided bioprospecting programme. World J Microbiol Biotechnol 2010. [DOI: 10.1007/s11274-010-0622-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
30
|
Bakkiyaraj D, Pandian SK. In vitro and in vivo antibiofilm activity of a coral associated actinomycete against drug resistant Staphylococcus aureus biofilms. BIOFOULING 2010; 26:711-717. [PMID: 20706890 DOI: 10.1080/08927014.2010.511200] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Staphylococcus aureus is now amongst the most important pathogenic bacteria responsible for bloodstream nosocomial infections and for biofilm formation on indwelling medical devices. Its increasing resistance to common antibiotics, partly attributed to its ability to form biofilms, is a challenge for the development of new antimicrobial agents. Accordingly, the goal of this study was to evaluate the effect of a coral associated actinomycete (CAA)-3 on S. aureus biofilms both in vitro and in vivo. Methanolic extracts of CAA-3 showed a reduction in in vitro biofilm formation by S. aureus ATCC 11632, methicillin resistant S. aureus ATCC 33591 and clinical isolates of S. aureus at the biofilm inhibitory concentration (BIC) of 0.1 mg ml(-1). Furthermore, confocal laser scanning microscope (CLSM) studies provide evidence of CAA-3 inhibiting intestinal colonisation of S. aureus in the nematode Caenorhabditis elegans. To conclude, this study for the first time, reports CAA as a promising source of anti-biofilm compounds, for developing novel drugs against highly resistant staphylococcal biofilms.
Collapse
|
31
|
Sibanda T, Mabinya LV, Mazomba N, Akinpelu DA, Bernard K, Olaniran AO, Okoh AI. Antibiotic producing potentials of three freshwater actinomycetes isolated from the Eastern Cape Province of South Africa. Int J Mol Sci 2010; 11:2612-23. [PMID: 20717525 PMCID: PMC2920555 DOI: 10.3390/ijms11072612] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Revised: 06/25/2010] [Accepted: 06/28/2010] [Indexed: 11/16/2022] Open
Abstract
Crude extracts of three actinomycetes species belonging to Saccharopolyspora (TR 046 and TR 039) and Actinosynnema (TR 024) genera were screened for antibacterial activities against a panel of several bacterial strains. The extracts showed antibacterial activities against both gram-negative and gram-positive test bacteria with inhibition zones ranging from 8 to 28 mm (TR 046); 8 to15 mm (TR 039); and 10 to 13 mm (TR 024). The minimum inhibitory concentrations ranged from 0.078 to 10 mg/mL (TR 046); 5 to >10 mg/mL (TR 039); and 1.25 to 5 mg/mL (TR 024). Time-kill studies revealed that crude extract of TR 046 showed strong bactericidal activity against Bacillus pumilus (ATCC14884), reducing the bacterial load by 104 cfu/mL and 102 cfu/mL at 4× MIC and 2× MIC, respectively, after 6 h of exposure. Similarly, against Proteus vulgaris (CSIR 0030), crude extract of TR 046 achieved a 0.9log10 and 0.13log10 cfu/mL reduction at 5 mg/mL (4× MIC) and 1.25 mg/mL (2× MIC) after 12 h of exposure. The extract was however weakly bactericidal against two environmental bacterial strains (Klebsiella pneumoniae and Staphylococcus epidermidis); and against Pseudomonas aeruginosa (ATCC 19582): the extract showed bacteriostatic activities at all concentrations tested. These freshwater actinomycetes appear to have immense potential as a source of new antibacterial compound(s).
Collapse
Affiliation(s)
- Timothy Sibanda
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa; E-Mails: (T.S.); (L.V.M.); (N.M.)
| | - Leonard V. Mabinya
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa; E-Mails: (T.S.); (L.V.M.); (N.M.)
| | - Ntsikelelo Mazomba
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa; E-Mails: (T.S.); (L.V.M.); (N.M.)
| | - David A. Akinpelu
- Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria; E-Mail:
| | - Kim Bernard
- South African Environmental Observation Network (SAEON), Elwandle Node, Grahamstown, South Africa; E-Mail:
| | - Ademola O. Olaniran
- Division of Microbiology, University of KwaZulu Natal, Durban Westville, South Africa; E-Mail:
| | - Anthony I. Okoh
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa; E-Mails: (T.S.); (L.V.M.); (N.M.)
- Author to whom correspondence should be addressed; E-Mail:
| |
Collapse
|
32
|
Hong K, Gao AH, Xie QY, Gao H, Zhuang L, Lin HP, Yu HP, Li J, Yao XS, Goodfellow M, Ruan JS. Actinomycetes for marine drug discovery isolated from mangrove soils and plants in China. Mar Drugs 2009; 7:24-44. [PMID: 19370169 PMCID: PMC2666887 DOI: 10.3390/md7010024] [Citation(s) in RCA: 233] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2008] [Revised: 01/20/2009] [Accepted: 01/21/2009] [Indexed: 02/05/2023] Open
Abstract
The mangrove ecosystem is a largely unexplored source for actinomycetes with the potential to produce biologically active secondary metabolites. Consequently, we set out to isolate, characterize and screen actinomycetes from soil and plant material collected from eight mangrove sites in China. Over 2,000 actinomycetes were isolated and of these approximately 20%, 5%, and 10% inhibited the growth of Human Colon Tumor 116 cells, Candida albicans and Staphylococcus aureus, respectively, while 3% inhibited protein tyrosine phosphatase 1B (PTP1B), a protein related to diabetes. In addition, nine isolates inhibited aurora kinase A, an anti-cancer related protein, and three inhibited caspase 3, a protein related to neurodegenerative diseases. Representative bioactive isolates were characterized using genotypic and phenotypic procedures and classified to thirteen genera, notably to the genera Micromonospora and Streptomyces. Actinomycetes showing cytotoxic activity were assigned to seven genera whereas only Micromonospora and Streptomyces strains showed anti-PTP1B activity. We conclude that actinomycetes isolated from mangrove habitats are a potentially rich source for the discovery of anti-infection and anti-tumor compounds, and of agents for treating neurodegenerative diseases and diabetes.
Collapse
Affiliation(s)
- Kui Hong
- Author to whom correspondence should be addressed; E-mail:
| | - An-Hui Gao
- National Center for Drug Screening, Shanghai Institute of Materia Medica, Shanghai 201203, China E-mails:
;
;
| | - Qing-Yi Xie
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences, Haikou 571101, P.R.China;;
;
| | - Hao Gao
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P.R. China; E-mail:
,
| | - Ling Zhuang
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences, Haikou 571101, P.R.China;;
;
| | - Hai-Peng Lin
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences, Haikou 571101, P.R.China;;
;
| | - Hai-Ping Yu
- National Center for Drug Screening, Shanghai Institute of Materia Medica, Shanghai 201203, China E-mails:
;
;
| | - Jia Li
- National Center for Drug Screening, Shanghai Institute of Materia Medica, Shanghai 201203, China E-mails:
;
;
| | - Xin-Sheng Yao
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P.R. China; E-mail:
,
| | | | - Ji-Sheng Ruan
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agriculture Sciences, Haikou 571101, P.R.China;;
;
- Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100081, P.R. China; E-mail:
| |
Collapse
|