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El Awady ME, El-Shall FN, Mohamed GE, Abd-Elaziz AM, Abdel-Monem MO, Hassan MG. Exploring the decolorization efficiency and biodegradation mechanisms of different functional textile azo dyes by Streptomyces albidoflavus 3MGH. BMC Microbiol 2024; 24:210. [PMID: 38877404 PMCID: PMC11179346 DOI: 10.1186/s12866-024-03347-9] [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: 02/06/2024] [Accepted: 05/22/2024] [Indexed: 06/16/2024] Open
Abstract
Efficiently mitigating and managing environmental pollution caused by the improper disposal of dyes and effluents from the textile industry is of great importance. This study evaluated the effectiveness of Streptomyces albidoflavus 3MGH in decolorizing and degrading three different azo dyes, namely Reactive Orange 122 (RO 122), Direct Blue 15 (DB 15), and Direct Black 38 (DB 38). Various analytical techniques, such as Fourier Transform Infrared (FTIR) spectroscopy, High-Performance Liquid Chromatography (HPLC), and Gas Chromatography-Mass Spectrometry (GC-MS) were used to analyze the degraded byproducts of the dyes. S. albidoflavus 3MGH demonstrated a strong capability to decolorize RO 122, DB 15, and DB 38, achieving up to 60.74%, 61.38%, and 53.43% decolorization within 5 days at a concentration of 0.3 g/L, respectively. The optimal conditions for the maximum decolorization of these azo dyes were found to be a temperature of 35 °C, a pH of 6, sucrose as a carbon source, and beef extract as a nitrogen source. Additionally, after optimization of the decolorization process, treatment with S. albidoflavus 3MGH resulted in significant reductions of 94.4%, 86.3%, and 68.2% in the total organic carbon of RO 122, DB 15, and DB 38, respectively. After the treatment process, we found the specific activity of the laccase enzyme, one of the mediating enzymes of the degradation mechanism, to be 5.96 U/mg. FT-IR spectroscopy analysis of the degraded metabolites showed specific changes and shifts in peaks compared to the control samples. GC-MS analysis revealed the presence of metabolites such as benzene, biphenyl, and naphthalene derivatives. Overall, this study demonstrated the potential of S. albidoflavus 3MGH for the effective decolorization and degradation of different azo dyes. The findings were validated through various analytical techniques, shedding light on the biodegradation mechanism employed by this strain.
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Affiliation(s)
- Mohamed E El Awady
- Microbial Biotechnology Department, Biotechnology Research Institute, National Research Centre, El- Buhouth St. 33, Dokki, Cairo, Egypt
| | - Fatma N El-Shall
- Dyeing, Printing and Textile Auxiliary Department, National Research Centre, El-Buhouth St. 33, Dokki, Cairo, 12622, Egypt
| | - Ghada E Mohamed
- Botany and Microbiology Department, Faculty of Science, Benha University, Benha, 13518, Egypt
| | - Ahmed M Abd-Elaziz
- Molecular Biology Department, Biotechnology Research Institute, National Research Centre, El-Buhouth St. 33, Dokki, Cairo, Egypt
| | - Mohamed O Abdel-Monem
- Botany and Microbiology Department, Faculty of Science, Benha University, Benha, 13518, Egypt.
| | - Mervat G Hassan
- Botany and Microbiology Department, Faculty of Science, Benha University, Benha, 13518, Egypt
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Edoamodu CE, Nwodo UU. Optimisation and physicochemical characterisation of a thermo-alkali stable laccase produced by wastewater associated Bacillus sp. NU2. ENVIRONMENTAL TECHNOLOGY 2023:1-16. [PMID: 37641161 DOI: 10.1080/09593330.2023.2253503] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Laccase is a multicopper enzyme that plays a unique role in bioremediation of environmental pollutants. Bacteria were isolated from hospital wastewater and screened for laccase production. The laccase production process condition was optimised, and the laccase obtained was characterised. The 16S rRNA molecular analysis conducted on the best laccase producer revealed a Bacillus sp. NU2 identified. The process conditions: pH5, 45°C, 100 rpm, 5% inoculum, and growth constituents viz: tangerine peel and wheat bran agro-wastes, beef extract, ammonium persulfate, glucose, galactose, xylose, sorbitol, fructose carbon sources; and 4-aminophenol inducer optimally stimulated laccase production. The Bacillus sp. NU2 laccase was optimal at pH and temperature conditions of 8.0°C and 60°C, with a noteworthy pH and thermal stability observed. Furthermore, NU2 laccase showed a moderate/high tolerance and relative activity effect on various chemical inhibitors, halides and surfactant of triton x-100 (105 ± 0.92%), PMSF (107 ± 0.81%), and NaCl (94 ± 0.81%) at 1, 3, and 6 (mM) concentration. Additionally, NU2 laccase maintained a relative activity of 101%, 104%, and 102% for Mg2+, Zn2+, and Fe3+ at 1, 3, and 6 mM respectively. Acetone and propanol significantly upregulated laccase activity at 114 ± 0.0008% and 118.24 ± 0.35 and also at 30 and 20 (%) concentrations. Conclusively, the tolerant effect of Bacillus sp. NU2 laccase in pH, temperature, inhibitors and organic solvents suggests its potential for biotechnological application and promotion of a greener environment.
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Affiliation(s)
- Chiedu E Edoamodu
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
| | - Uchechukwu U Nwodo
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
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Edoamodu CE, Nwodo UU. Decolourization of synthetic dyes by laccase produced from Bacillus sp. NU2. BIOTECHNOL BIOTEC EQ 2022. [DOI: 10.1080/13102818.2022.2053341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Affiliation(s)
- Chiedu Epiphany Edoamodu
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
| | - Uchechukwu Uchechukwu Nwodo
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, South Africa
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Puspita K, Chiari W, Abdulmadjid SN, Idroes R, Iqhrammullah M. Four Decades of Laccase Research for Wastewater Treatment: Insights from Bibliometric Analysis. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 20:308. [PMID: 36612634 PMCID: PMC9819511 DOI: 10.3390/ijerph20010308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/20/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
Increasing trends of environmental pollution and emerging contaminants from anthropogenic activities have urged researchers to develop innovative strategies in wastewater management, including those using the biocatalyst laccase (EC 1.10.3.2). Laccase works effectively against a variety of substrates ranging from phenolic to non-phenolic compounds which only require molecular oxygen to be later reduced to H2O as the final product. In this study, we performed a bibliometric analysis on the metadata of literature acquired through the Scopus database (24 October 2022) with keyword combination "Laccase" AND "Pollutant" OR "Wastewater". The included publications were filtered based on year of publication (1978-2022), types of articles (original research articles and review articles) and language (English). The metadata was then exported in a CSV (.csv) file and visualized on VosViewer software. A total of 1865 publications were identified, 90.9% of which were original research articles and the remaining 9.1% were review articles. Most of the authors were from China (n = 416; 22.3%) and India (n = 276; 14.79%). In the case of subject area, 'Environmental Science' emerged with the highest published documents (n = 1053; 56.46%). The identified papers mostly cover laccase activity in degrading pollutants, and chitosan, which can be exploited for the immobilization. We encourage more research on laccase-assisted wastewater treatment, especially in terms of collaborations among organizations.
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Affiliation(s)
- Kana Puspita
- Department of Chemistry Education, Faculty of Education and Teacher Training, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
| | - Williams Chiari
- Department of Mathematics, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
- Innovative Sustainability Lab, PT. Biham Riset dan Edukasi, Banda Aceh 23243, Indonesia
| | - Syahrun N. Abdulmadjid
- Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
| | - Rinaldi Idroes
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
- Department of Pharmacy, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
| | - Muhammad Iqhrammullah
- Innovative Sustainability Lab, PT. Biham Riset dan Edukasi, Banda Aceh 23243, Indonesia
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Syiah Kuala, Banda Aceh 23111, Indonesia
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Kamoun F, Weekers F, Ayed RB, Mechri S, Jabeur F, Thonart P, Jaouadi B. Multiple linear regression models to simulate spore yields of Bacillus amyloliquefaciens BS13 through optimization of medium composition. Biotechnol Appl Biochem 2022; 69:2686-2697. [PMID: 34994000 DOI: 10.1002/bab.2315] [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: 08/26/2021] [Accepted: 12/28/2021] [Indexed: 12/27/2022]
Abstract
Bacillus amyloliquefaciens is a food spoilage spore-forming bacterium. Its spores are useful for multiple biotechnological applications. Nevertheless, few reports are available regarding the achievement of a high cell density and good sporulation effectiveness under fermentation conditions. Therefore, the current study was designed to optimize a low-cost fermentation medium allowing the highest sporulation yield by B. amyloliquefaciens strain BS13. Our data revealed that tryptone and starch were the best carbon and energy sources. In addition, two nitrogen sources namely, corn steep liquor (CSL) and yeast extract (YE), allowed a significant enhancement of spore production and they were both retained for further optimization. A combination of CaCl2 , MgSO4 , and MnSO4 showed a positive impact on spores' production. The composition of the optimized medium was (in g/L); tryptone 3, starch 15, CSL 13.5, YE 1.5, CaCl2 0.1, MgSO4 ·7H2 O 0.012, and MnSO4 ·7H2 O 0.0012. Such medium was further validated in a 400-L fermentor. The spore yield by B. amyloliquefaciens strain BS13 was enhanced from 3.0 × 1010 spores/mL under flask culture conditions to 6.2 × 1010 spores/mL when cultures were performed on large scale. Therefore, strain BS13 spore preparation could be proposed as a promising probiotic and a biocontrol agent useful for plants, animals, and humans.
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Affiliation(s)
- Fakher Kamoun
- Laboratoire des Biotechnologies Microbiennes et Enzymatiques et Biomolécules, Centre de Biotechnologie de Sfax, Université de Sfax, Sfax, Tunisia
| | | | - Rayda Ben Ayed
- Laboratoire de Procédés de Criblage Moléculaire et Cellulaire, Centre de Biotechnologie de Sfax, Université de Sfax, Sfax, Tunisia
| | - Sondes Mechri
- Laboratoire des Biotechnologies Microbiennes et Enzymatiques et Biomolécules, Centre de Biotechnologie de Sfax, Université de Sfax, Sfax, Tunisia
| | - Fadoua Jabeur
- Laboratoire des Biotechnologies Microbiennes et Enzymatiques et Biomolécules, Centre de Biotechnologie de Sfax, Université de Sfax, Sfax, Tunisia
| | - Philippe Thonart
- Centre Wallon de Biologie Industrielle, Unité de Technologie Microbienne, Université de Liège, Liège, Belgium
| | - Bassem Jaouadi
- Laboratoire des Biotechnologies Microbiennes et Enzymatiques et Biomolécules, Centre de Biotechnologie de Sfax, Université de Sfax, Sfax, Tunisia
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Unuofin JO, Moloantoa KM, Khetsha ZP. The biobleaching potential of a laccase produced from mandarin peelings: impetus for a circular bio-based economy in textile biofinishing. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Verma P, Tripathi S, Yadav S, Chandra R. Degradation and decolourization potential of ligninolytic enzyme producing Bacillus paramycoides BL2 and Micrococcus luteus BL3 for pulp paper industrial effluent and its toxicity evaluation. Arch Microbiol 2022; 204:642. [PMID: 36161364 DOI: 10.1007/s00203-022-03236-7] [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: 07/08/2022] [Revised: 08/03/2022] [Accepted: 09/01/2022] [Indexed: 11/26/2022]
Abstract
Aim of this study was to optimize the production of Ligninolytic enzyme for the degradation of complex pollutants present in pulp paper industrial effluent (PPIE). Two ligninolytic enzyme-producing bacterial strains were isolated from PPIE and identified as Bacillus paramycoides strain BL2 (MZ676667) and Micrococcus luteus strains BL3 (MZ676668). The identified bacterial strain Bacillus paramycoides strain BL2 showed optimum production of LiP (4.30 U/ml), MnP (3.38 U/ml) at 72 h of incubation, while laccase (4.43 U/ml) at 96 h of incubation. While, Micrococcus luteus strains BL3 produced maximum LiP (3.98) and MnP (3.85 U/ml) at 96 h of incubation and maximum laccase (3.85 U/ml) at 72 h of incubation, pH 7-8, and temperatures of 30-35 °C. Furthermore, in the presence of glucose (1.0%) and peptone (0.5%) as nutrient sources, the enzyme activity of consortium leads to reduction of lignin (70%), colour (63%) along with COD (71%) and BOD (58%). The pollutants detected in control i.e. 3.6-Dioxa-2,7-disilaoctane, 2-Heptnoic acid,trimethylsilyl ester, 7-Methyldinaphtho [2,1-b,1',2'-d] silole, Hexadeconoic acid, trimethylysilyl ester, Methyl1(Z)-3,3-dipheny.1-4-hexenoale, 2,6,10,14,18,22-Tetracosahexane,2,2-dimethylpropyl(2Z,6E)-10,11epoxy5,6 Dihyrostigmasterol, acetate were completely diminished. The toxicity of PPIE was reduced up to 75%. Hence, knowledge of this study will be very useful for industrial sector for treatment of complex wastewater.
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Affiliation(s)
- Prerna Verma
- Department of Environmental Microbiology, School for Environmental Sciences, Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow, Uttar Pradesh, 226025, India
| | - Sonam Tripathi
- Department of Environmental Microbiology, School for Environmental Sciences, Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow, Uttar Pradesh, 226025, India
| | - Sangeeta Yadav
- Department of Environmental Microbiology, School for Environmental Sciences, Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow, Uttar Pradesh, 226025, India
| | - Ram Chandra
- Department of Environmental Microbiology, School for Environmental Sciences, Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow, Uttar Pradesh, 226025, India.
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Santal AR, Rani R, Kumar A, Sharma JK, Singh NP. Biodegradation and detoxification of textile dyes using a novel bacterium Bacillus sp. AS2 for sustainable environmental cleanup. BIOCATAL BIOTRANSFOR 2022. [DOI: 10.1080/10242422.2022.2113518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Anita Rani Santal
- Department of Microbiology, Maharshi Dayanand University, Rohtak, Haryana, India
| | - Ritu Rani
- Department of Microbiology, Maharshi Dayanand University, Rohtak, Haryana, India
| | - Anil Kumar
- Department of Microbiology, Maharshi Dayanand University, Rohtak, Haryana, India
| | | | - Nater Pal Singh
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, Haryana, India
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Yang J, Xu H, Zhao J, Zhang N, Xie J, Jiang J. Isolation of Bacillus sp. with high laccase activity for green biodecolorization of synthetic textile dyes. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:777-786. [PMID: 36038976 DOI: 10.2166/wst.2022.237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
New Bacillus sp. strains with spore-laccase activity were isolated from rotten wood and soil samples and were identified as Bacillus sp. FM-78 and Bacillus paramycoides FM-86 by 16S rDNA gene sequence analysis. Both laccases were stable at broad pH range and high temperature. The laccase of strain FM-78 showed preferable activity and stability, with no loss of activity after 7 days incubation at pH 9.0, and 20.36% of its initial activity obtained after 10 h at 80 °C. 1 mmol/L EDTA, NaN3 and SDS resulted in about 46-59% inactivation and strongly inhibition (87.88%) was caused by 1 mmol/L L-cysteine. However, the spore laccase could tolerate towards 0.5 mol/L NaCl as well as 10% of organic solvents. Reactive black 5, reactive blue 19 and crystal violet were decolorized by the spore laccase in the absence of mediator. The decolorization process was efficiently promoted with the presence of acetosyringone, and the color removal ratio was more than 80% in 1 h with the pH values of 6.6 or 9.0. Finally, the above unusual properties of Bacillus sp. spore laccase indicated it as a potential candidate in the dye decolorization in an ecofriendly and cost-effective way.
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Affiliation(s)
- Jing Yang
- Institute of Chemical Industry of Forest Products, CAF; National Engineering Laboratory for Biomass Chemical Utilization; Key and Open Laboratory of Forest Chemical Engineering, SFA; Key Laboratory of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, PR China E-mail: ; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, PR China
| | - Hao Xu
- Institute of Chemical Industry of Forest Products, CAF; National Engineering Laboratory for Biomass Chemical Utilization; Key and Open Laboratory of Forest Chemical Engineering, SFA; Key Laboratory of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, PR China E-mail: ; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, PR China
| | - Jian Zhao
- Institute of Chemical Industry of Forest Products, CAF; National Engineering Laboratory for Biomass Chemical Utilization; Key and Open Laboratory of Forest Chemical Engineering, SFA; Key Laboratory of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, PR China E-mail: ; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, PR China
| | - Ning Zhang
- Institute of Chemical Industry of Forest Products, CAF; National Engineering Laboratory for Biomass Chemical Utilization; Key and Open Laboratory of Forest Chemical Engineering, SFA; Key Laboratory of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, PR China E-mail: ; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, PR China
| | - Jingcong Xie
- Institute of Chemical Industry of Forest Products, CAF; National Engineering Laboratory for Biomass Chemical Utilization; Key and Open Laboratory of Forest Chemical Engineering, SFA; Key Laboratory of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, PR China E-mail: ; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, PR China
| | - Jianchun Jiang
- Institute of Chemical Industry of Forest Products, CAF; National Engineering Laboratory for Biomass Chemical Utilization; Key and Open Laboratory of Forest Chemical Engineering, SFA; Key Laboratory of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, PR China E-mail: ; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, PR China
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Thipraksa J, Chaijak P, Michu P, Lertworapreecha M. Biodegradation and bioelectricity generation of melanoidin in palm oil mill effluent (POME) by laccase-producing bacterial consortium integrated with microbial fuel cell. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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Vinayak A, Singh GB. Synthetic azo dye bio-decolorization by Priestia sp. RA1: process optimization and phytotoxicity assessment. Arch Microbiol 2022; 204:318. [PMID: 35567666 DOI: 10.1007/s00203-022-02931-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 04/20/2022] [Indexed: 01/08/2023]
Abstract
Azo compounds represent the most diverse group of colorants widely employed in industrial sectors. Being highly toxic and recalcitrant compound, azo dyes pose a threat to plants, animals, and humans. In the present report, bio-decolorization of azo dye, reactive black 5, was evaluated by newly isolated Priestia sp. RA1. Strain RA1 was able to decolorize 97% of 100 ppm reactive black 5 in 60 h. Specific activity of dye decolorization was found to be 0.233 μmol min-1 g-1 dry cells. Successful decolorization over a broad range of pH, salinity, temperature, and initial dye concentration was observed. Phytotoxicity assay on agriculturally important crops showed considerable difference in percentage seed germination and growth when treated with original and bio-decolorized dye samples. Bio-decolorization at high dye concentrations, promising decolorization rate, and non-toxic nature of treated products suggest the potential of strain RA1 for bioremediation of dye-contaminated water and its re-use in the industries.
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Affiliation(s)
- Ankita Vinayak
- University Institute of Biotechnology, Chandigarh University, Mohali, Punjab, 140413, India
| | - Gajendra B Singh
- University Institute of Biotechnology, Chandigarh University, Mohali, Punjab, 140413, India.
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Kolyadenko I, Scherbakova A, Kovalev K, Gabdulkhakov A, Tishchenko S. Engineering the Catalytic Properties of Two-Domain Laccase from Streptomyces griseoflavus Ac-993. Int J Mol Sci 2021; 23:ijms23010065. [PMID: 35008493 PMCID: PMC8744557 DOI: 10.3390/ijms23010065] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 12/18/2021] [Accepted: 12/19/2021] [Indexed: 11/16/2022] Open
Abstract
Laccases catalyze the oxidation of substrates with the concomitant reduction of oxygen to water. Recently, we found that polar residues located in tunnels leading to Cu2 and Cu3 ions control oxygen entrance (His 165) and proton transport (Arg 240) of two-domain laccase (2D) from Streptomyces griseoflavus (SgfSL). In this work, we have focused on optimizing the substrate-binding pocket (SBP) of SgfSL while simultaneously adjusting the oxygen reduction process. SgfSL variants with three single (Met199Ala, Met199Gly, and Tyr230Ala) and three double amino acid residues substitutions (Met199Gly/His165Ala, His165Ala/Arg240His, Met199Gly/Arg240His) were constructed, purified, and investigated. Combination of substitutions in the SBP and in the tunnel leading to Cu2 ion (Met199Gly/Arg240His) increased SgfSL catalytic activity towards ABTS by 5-fold, and towards 2.6-DMP by 16-fold. The high activity of the Met199Gly/Arg240His variant can be explained by the combined effect of the SBP geometry optimization (Met199Gly) and increased proton flux via the tunnel leading to Cu2 ion (Arg240His). Moreover, the variant with Met199Gly and His165Ala mutations did not significantly increase SgfSL's activity, but led to a drastic shift in the optimal pH of 2.6-DMP oxidation. These results indicate that His 165 not only regulates oxygen access, but it also participates in proton transport in 2D laccases.
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Affiliation(s)
- Ilya Kolyadenko
- Institute of Protein Research RAS, 142290 Pushchino, Russia; (A.S.); (A.G.); (S.T.)
- Correspondence:
| | | | - Kirill Kovalev
- European Molecular Biology Laboratory, 22607 Hamburg, Germany;
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Azat Gabdulkhakov
- Institute of Protein Research RAS, 142290 Pushchino, Russia; (A.S.); (A.G.); (S.T.)
| | - Svetlana Tishchenko
- Institute of Protein Research RAS, 142290 Pushchino, Russia; (A.S.); (A.G.); (S.T.)
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Mao G, Wang K, Wang F, Li H, Zhang H, Xie H, Wang Z, Wang F, Song A. An Engineered Thermostable Laccase with Great Ability to Decolorize and Detoxify Malachite Green. Int J Mol Sci 2021; 22:11755. [PMID: 34769185 PMCID: PMC8583942 DOI: 10.3390/ijms222111755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/20/2021] [Accepted: 10/26/2021] [Indexed: 11/28/2022] Open
Abstract
Laccases can catalyze the remediation of hazardous synthetic dyes in an eco-friendly manner, and thermostable laccases are advantageous to treat high-temperature dyeing wastewater. A novel laccase from Geothermobacter hydrogeniphilus (Ghlac) was cloned and expressed in Escherichia coli. Ghlac containing 263 residues was characterized as a functional laccase of the DUF152 family. By structural and biochemical analyses, the conserved residues H78, C119, and H136 were identified to bind with one copper atom to fulfill the laccase activity. In order to make it more suitable for industrial use, Ghlac variant Mut2 with enhanced thermostability was designed. The half-lives of Mut2 at 50 °C and 60 °C were 80.6 h and 9.8 h, respectively. Mut2 was stable at pH values ranging from 4.0 to 8.0 and showed a high tolerance for organic solvents such as ethanol, acetone, and dimethyl sulfoxide. In addition, Mut2 decolorized approximately 100% of 100 mg/L of malachite green dye in 3 h at 70 °C. Furthermore, Mut2 eliminated the toxicity of malachite green to bacteria and Zea mays. In summary, the thermostable laccase Ghlac Mut2 could effectively decolorize and detoxify malachite green at high temperatures, showing great potential to remediate the dyeing wastewater.
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Affiliation(s)
- Guotao Mao
- Department of Microbiology, College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China; (G.M.); (K.W.); (F.W.); (H.L.); (H.Z.); (H.X.); (F.W.)
- The Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Henan Agricultural University, Zhengzhou 450002, China
| | - Kai Wang
- Department of Microbiology, College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China; (G.M.); (K.W.); (F.W.); (H.L.); (H.Z.); (H.X.); (F.W.)
| | - Fangyuan Wang
- Department of Microbiology, College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China; (G.M.); (K.W.); (F.W.); (H.L.); (H.Z.); (H.X.); (F.W.)
| | - Hao Li
- Department of Microbiology, College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China; (G.M.); (K.W.); (F.W.); (H.L.); (H.Z.); (H.X.); (F.W.)
| | - Hongsen Zhang
- Department of Microbiology, College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China; (G.M.); (K.W.); (F.W.); (H.L.); (H.Z.); (H.X.); (F.W.)
- The Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Henan Agricultural University, Zhengzhou 450002, China
| | - Hui Xie
- Department of Microbiology, College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China; (G.M.); (K.W.); (F.W.); (H.L.); (H.Z.); (H.X.); (F.W.)
- The Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Henan Agricultural University, Zhengzhou 450002, China
| | - Zhimin Wang
- Department of Applied Chemistry, College of Science, Henan Agricultural University, Zhengzhou 450002, China;
| | - Fengqin Wang
- Department of Microbiology, College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China; (G.M.); (K.W.); (F.W.); (H.L.); (H.Z.); (H.X.); (F.W.)
- The Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Henan Agricultural University, Zhengzhou 450002, China
| | - Andong Song
- Department of Microbiology, College of Life Sciences, Henan Agricultural University, Zhengzhou 450002, China; (G.M.); (K.W.); (F.W.); (H.L.); (H.Z.); (H.X.); (F.W.)
- The Key Laboratory of Enzyme Engineering of Agricultural Microbiology, Ministry of Agriculture, Henan Agricultural University, Zhengzhou 450002, China
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Draft Genome Sequence and Annotation of the Synthetic Textile Dye-Decolorizing Strain Bacillus amyloliquefaciens AD20, Isolated from a Dye Waste Pond. Microbiol Resour Announc 2021; 10:e0064521. [PMID: 34435869 PMCID: PMC8388534 DOI: 10.1128/mra.00645-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
A limited number of Bacillus amyloliquefaciens genome sequences have been generated and are available in the public domain from soil, fermented foods, and plants. Here, we report the whole-genome sequence of B. amyloliquefaciens AD20, isolated from a dye pond with azo dye decolorization capabilities.
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15
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Gogotya A, Nnolim NE, Digban TO, Okoh AI, Nwodo UU. Characterization of a thermostable and solvent-tolerant laccase produced by Streptomyces sp. LAO. Biotechnol Lett 2021; 43:1429-1442. [PMID: 33864196 DOI: 10.1007/s10529-021-03131-z] [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] [Received: 03/03/2021] [Accepted: 04/08/2021] [Indexed: 02/07/2023]
Abstract
OBJECTIVES Decaying wood samples were collected, and actinomycetes were isolated and screened for laccase production. The identity of the efficient laccase-producing isolate was confirmed by using a molecular approach. Fermentation conditions for laccase production were optimized, and laccase biochemical properties were studied. RESULTS Based on the 16S rRNA gene sequencing and phylogenetic analysis, the isolate coded as HWP3 was identified as Streptomyces sp. LAO. The time-course study showed that the isolate optimally produced laccase at 84 h with 40.58 ± 2.35 U/mL activity. The optimized physicochemical conditions consisted of pH 5.0, ferulic acid (0.04%; v/v), pine back (0.2 g/L), urea (1.0 g/L), and lactose (1 g/L). Streptomyces sp. LAO laccase was optimally active at pH and temperature of 8.0 and 90 °C, respectively, with remarkable pH and thermal stability. Furthermore, the enzyme had a sufficient tolerance for organic solvents after 16 h of preincubation, with laccase activity > 70%. Additionally, the laccase maintained considerable residual activity after pretreatment with 100 mM of chemical agents, including sodium dodecyl sulphate (69.93 ± 0.89%), ethylenediaminetetraacetic acid (93.1 ± 7.85%), NaN3 (96.28 ± 3.34%) and urea (106.03 ± 10.72%). CONCLUSION The laccase's pH and thermal stability; and robust catalytic efficiency in the presence of organic solvents suggest its industrial and biotechnological application potentials for the sustainable development of green chemistry.
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Affiliation(s)
- Asemahle Gogotya
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314 Eastern Cape, Alice, 5700, South Africa
| | - Nonso E Nnolim
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314 Eastern Cape, Alice, 5700, South Africa
| | - Tennison O Digban
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314 Eastern Cape, Alice, 5700, South Africa
| | - Anthony I Okoh
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314 Eastern Cape, Alice, 5700, South Africa
| | - Uchechukwu U Nwodo
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa. .,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314 Eastern Cape, Alice, 5700, South Africa.
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Zhou J, Fan X, Li J, Wang X, Yuan Z. Isolation and identification of naphthalene degrading bacteria and their degradation characteristics under rainwater environment in heavily polluted areas. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2021; 56:434-444. [PMID: 33989122 DOI: 10.1080/10934529.2021.1885260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/26/2021] [Accepted: 01/27/2021] [Indexed: 06/12/2023]
Abstract
This study is screened for naphthalene degrading strains from a heavily polluted area with high naphthalene concentration in the rainwater for the effective removal of naphthalene from rainwater. Recently, naphthalene biodegradation has been achieved in water. However, the influences of organics and inorganics in the rainwater on the biodegradation of naphthalene remains unclear. The naphthalene degrading strain Klebsiella sp. (WJ-1) was identified from sewage sludge. The effects of temperature, pH, inoculum size, and rotation speed on the degradation ability of WJ-1 were studied. The results showed that the naphthalene degradation rates of WJ-1 in rainwater were higher than those in aqueous solution at different experimental conditions. The optimal conditions were 30 °C, 10% inoculum size, pH 7.0, and a rotation speed of 150 rpm. The substances in rainwater might be important co-metabolites of naphthalene degradation. Based on intermediate metabolites detected by gas chromatography-mass spectrometer (GC-MS), the naphthalene biodegradation pathway was identified, as being similar to the phthalic acid pathway. These results suggest WJ-1 as a good candidate for the efficient bioremediation of naphthalene from rainwater in heavily polluted areas.
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Affiliation(s)
- Jiaying Zhou
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Xiaodan Fan
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
- Tianjin Key laboratory of Aquatic Science and Technology, Tianjin, China
- Municipal Experimental teaching Demonstration Center of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
- Tianjin International Joint Research and Development Center, Tianjin, China
| | - Jinjia Li
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Xueqi Wang
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
| | - Zhengtong Yuan
- School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin, China
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