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Dhagat S, Jujjavarapu SE. Green synthesis of bioemulsifier and exopolysaccharides by Brevibacillus borstelensis and process parameters optimization using response surface model, genetic algorithm and NSGA. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 291:112667. [PMID: 33934022 DOI: 10.1016/j.jenvman.2021.112667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 04/10/2021] [Accepted: 04/15/2021] [Indexed: 06/12/2023]
Abstract
Bioemulsifier and exopolysaccharides are industrially important biomolecules produced by microorganisms using green technology. They have applications in food, biomedical, pharmaceutical and cosmetic industries and hence high yield of both products becomes necessary. The current study showed that Brevibacillus borstelensis has a potential to produce bioemulsifier and exopolysaccharide simultaneously but yield of both products is limited. In this study, CCD-RSM has been used as experimental design to increase concentration of both products. Concentrations of glucose, monosodium glutamate, yeast extract and magnesium sulphate were process variables and concentrations of bioemulsifiers, exopolysaccharides and biomass were responses. 30 experimental runs were performed and the models from CCD were optimized by genetic algorithm and NSGA. The results from modelling and optimization techniques were compared along with validation of models. The predicted values from optimization techniques were better than experimental values. The study concluded that NSGA is most suitable to optimize multiple responses simultaneously when compared to RSM and genetic algorithm. The optimum conditions for production were 22 g/l glucose, 14 g/l monosodium glutamate, 6 g/l yeast extract and 0.6 g/l magnesium sulphate with maximum yield of 6.1, 17.6 and 2.8 g/l bioemulsifier, exopolysaccharide and biomass, respectively. Knowledge of optimum concentrations of carbon and nitrogen source will help to utilize industrial and agricultural wastes for production of both products. They have applications in environmental bioremediation by clearing oil spills. Bioemulsifiers also help in heavy metal removal from hazardous waste. Hence this will result in environmental bioremediation by utilization of wastes by employing products generated from wastes.
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Affiliation(s)
- Swasti Dhagat
- Department of Biotechnology, National Institute of Technology Raipur, Raipur, India
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El-Housseiny GS, Ibrahim AA, Yassien MA, Aboshanab KM. Production and statistical optimization of Paromomycin by Streptomyces rimosus NRRL 2455 in solid state fermentation. BMC Microbiol 2021; 21:34. [PMID: 33485318 PMCID: PMC7825151 DOI: 10.1186/s12866-021-02093-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Accepted: 01/17/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Paromomycin is a 2-deoxystreptamine aminocyclitol aminoglycoside antibiotic with broad spectrum activity against Gram-negative, Gram-positive bacteria and many protozoa. This study introduces a strategy for paromomycin production through solid-state fermentation using Streptomyces rimosus subsp. paromomycinus NRRL 2455. Solid state fermentation has gained enormous attention in the development of several products because of their numerous advantages over submerged liquid fermentation. After selecting the best solid substrate, a time course study of paromomycin production was carried out followed by optimization of environmental conditions using response surface methodology. Paromomycin yields obtained using this technique were also compared to those obtained using submerged liquid fermentation. RESULTS Upon screening of 6 different substrates, maximum paromomycin concentration (0.51 mg/g initial dry solids) was obtained with the cost-effective agro-industrial byproduct, corn bran, impregnated with aminoglycoside production media. Optimization of environmental conditions using D-optimal design yielded a 4.3-fold enhancement in paromomycin concentration reaching 2.21 mg/g initial dry solids at a pH of 8.5, inoculum size of 5% v/w and a temperature of 30 °C. CONCLUSION Compared to submerged liquid fermentation, solid state fermentation resulted in comparable paromomycin concentrations, cost reduction of raw materials, less energy consumption and waste water discharge, which have major implications in industrial fermentation. Therefore, solid state fermentation is a promising alternative to submerged liquid fermentation for paromomycin production. To the best of our knowledge, this is the first report on the optimized paromomycin production through solid state fermentation process.
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Affiliation(s)
- Ghadir S. El-Housseiny
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St, POB: 11566, Cairo, Abbassia Egypt
| | - Asmaa A. Ibrahim
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St, POB: 11566, Cairo, Abbassia Egypt
| | - Mahmoud A. Yassien
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St, POB: 11566, Cairo, Abbassia Egypt
| | - Khaled M. Aboshanab
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Organization of African Unity St, POB: 11566, Cairo, Abbassia Egypt
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El-Sayed SE, El-Housseiny GS, Abdelaziz NA, El-Ansary MR, Aboshanab KM. Optimized Production of the Allylamine Antifungal "Terbinafine" by Lysinibacillus Isolate MK212927 Using Response Surface Methodology. Infect Drug Resist 2020; 13:3613-3626. [PMID: 33116681 PMCID: PMC7571585 DOI: 10.2147/idr.s267590] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Accepted: 09/15/2020] [Indexed: 01/17/2023] Open
Abstract
Purpose We aimed to optimize the factors affecting the production of the allylamine antifungal, terbinafine, by Lysinibacillus isolate MK212927, a natural producer of this broad-spectrum fungicidal compound. Methods We employed a central composite design to optimize the five most important variables influencing the production of terbinafine which were carbon source, nitrogen source, temperature, pH and agitation. Results The optimum conditions were found to be starch 5 g/L, ammonium chloride 5 g/L, temperature 32°C, agitation 150 rpm and pH 7. The actual response (inhibition zone diameter) was highly comparable to the value predicted by the model, indicating a valid model. Using the standard calibration curve of terbinafine, the optimized conditions resulted in an increase in the antifungal metabolite production (terbinafine) by about 1.6-fold (1814.662 µg/mL compared to 1165.550 µg/mL under standardized conditions). Conclusion This is the first report, to the best of our knowledge, on optimized production of terbinafine by Lysinibacillus species. Hence, these findings may be useful as baseline data for scaling up the production of terbinafine from a natural microbial source.
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Affiliation(s)
- Sayed E El-Sayed
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ahram Canadian University, Giza, Egypt
| | - Ghadir S El-Housseiny
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt
| | - Neveen A Abdelaziz
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ahram Canadian University, Giza, Egypt
| | - Mona R El-Ansary
- Department of Biochemistry, Modern University for Technology and Information (MTI), Cairo, Egypt
| | - Khaled M Aboshanab
- Department of Microbiology and Immunology, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt
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Yaseen Y, Gancel F, Béchet M, Drider D, Jacques P. Study of the correlation between fengycin promoter expression and its production by Bacillus subtilis under different culture conditions and the impact on surfactin production. Arch Microbiol 2017; 199:1371-1382. [PMID: 28735377 DOI: 10.1007/s00203-017-1406-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Revised: 06/01/2017] [Accepted: 06/26/2017] [Indexed: 11/28/2022]
Abstract
This work aimed to rely expression of the fengycin promoter to fengycin production under different culture conditions. To this end, Bacillus subtilis BBG208, derived from BBG21, which is a fengycin overproducing strain carrying the green fluorescent protein (GFP) under the control of fengycin promoter, was used to assess the effects of different carbon and nitrogen sources on surfactin and fengycin production and the fengycin promoter expression. The data showed that some carbon sources oriented synthesis of one family of lipopeptides, while most of the nitrogen sources allowed high co-production of fengycin and surfactin. High expressions of promoter Pfen and fengycin synthesis were obtained with urea or urea + ammonium mixture as nitrogen source and mannitol as carbon source. Moreover, temperature, pH and oxygenation influenced their biosynthesis based on the nutrition conditions. Optimization of the production medium increased the fengycin production to 768 mg L-1, which is the highest level reported for this strain. This study defines the suitable nutrient conditions allowing as well the highest expression of the fengycin promoter and portrays the conditions relying on the fengycin and surfactin production.
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Affiliation(s)
- Yazen Yaseen
- Charles Viollette Institute, University Lille 1, Sciences and Technologies, Cité Scientifique, 59655, Villeneuve d'Ascq, France.,Terra Teaching and Research Centre, Microbial Processes and Interactions, Gembloux Agro-Bio Tech, University of Liege, Gembloux, B-5030, Liège, Belgium
| | - Frédérique Gancel
- Charles Viollette Institute, University Lille 1, Sciences and Technologies, Cité Scientifique, 59655, Villeneuve d'Ascq, France.,Terra Teaching and Research Centre, Microbial Processes and Interactions, Gembloux Agro-Bio Tech, University of Liege, Gembloux, B-5030, Liège, Belgium
| | - Max Béchet
- Charles Viollette Institute, University Lille 1, Sciences and Technologies, Cité Scientifique, 59655, Villeneuve d'Ascq, France.,Terra Teaching and Research Centre, Microbial Processes and Interactions, Gembloux Agro-Bio Tech, University of Liege, Gembloux, B-5030, Liège, Belgium
| | - Djamel Drider
- Charles Viollette Institute, University Lille 1, Sciences and Technologies, Cité Scientifique, 59655, Villeneuve d'Ascq, France.,Terra Teaching and Research Centre, Microbial Processes and Interactions, Gembloux Agro-Bio Tech, University of Liege, Gembloux, B-5030, Liège, Belgium
| | - Philippe Jacques
- Charles Viollette Institute, University Lille 1, Sciences and Technologies, Cité Scientifique, 59655, Villeneuve d'Ascq, France. .,Terra Teaching and Research Centre, Microbial Processes and Interactions, Gembloux Agro-Bio Tech, University of Liege, Gembloux, B-5030, Liège, Belgium.
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