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Elmetwalli A, Allam NG, Hassan MG, Albalawi AN, Shalaby A, El-Said KS, Salama AF. Evaluation of Bacillus aryabhattai B8W22 peroxidase for phenol removal in waste water effluents. BMC Microbiol 2023; 23:119. [PMID: 37120512 PMCID: PMC10148497 DOI: 10.1186/s12866-023-02850-9] [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: 01/19/2023] [Accepted: 04/04/2023] [Indexed: 05/01/2023] Open
Abstract
Environmental contamination by phenol has been reported in both aquatic and atmospheric environments. This study aimed to separate and purify the peroxidase enzyme from bacteria that degrade phenol from wastewater sources. An enrichment culture of MSM was used to screen 25 bacterial isolates from different water samples for peroxidase production, six of the isolates exhibited high levels of peroxidase enzyme activity. Qualitative analysis of peroxidase revealed that isolate No. 4 had the highest halo zones (Poly-R478: 14.79 ± 0.78 mm, Azure B: 8.81 ± 0.61 mm). The promising isolate was identified as Bacillus aryabhattai B8W22 by 16S rRNA gene sequencing with accession number OP458197. As carbon and nitrogen sources, mannitol and sodium nitrate were utilized to achieve maximum peroxidase production. A 30-h incubation period was used with pH 6.0, 30 °C, mannitol, and sodium nitrate, respectively, for maximal production of peroxidase. Purified peroxidase enzyme showed 0.012 U/mg specific activity, and SDS-PAGE analysis indicated a molecular weight of 66 kDa. The purified enzyme exhibits maximum activity and thermal stability at pH values of 4.0 and 8.0, respectively, with maximum activity at 30 °C and complete thermal stability at 40 °C. In the purified enzyme, the Km value was 6.942 mg/ml and the Vmax value was 4.132 mol/ml/hr, respectively. The results demonstrated that Bacillus aryabhattai B8W22 has promising potential for degrading phenols from various phenol-polluted wastewater sources.
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Affiliation(s)
- Alaa Elmetwalli
- Department of Clinical Trial Research Unit and Drug Discovery, Egyptian Liver Research Institute and Hospital (ELRIAH), Mansoura, Egypt.
| | - Nanis G Allam
- Microbiology Division, Botany Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt
| | - Mervat G Hassan
- Department of Botany and Microbiology, Faculty of Science, Benha University, Benha, 33516, Egypt
| | - Aisha Nawaf Albalawi
- Department of Biology , University of Haql College, University of Tabuk, Tabuk, 71491, Saudi Arabia
| | - Azza Shalaby
- Biochemistry Division, Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt
| | - Karim Samy El-Said
- Biochemistry Division, Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt
| | - Afrah Fatthi Salama
- Biochemistry Division, Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt.
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2
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Thermostable cellulose saccharifying microbial enzymes: Characteristics, recent advances and biotechnological applications. Int J Biol Macromol 2021; 188:226-244. [PMID: 34371052 DOI: 10.1016/j.ijbiomac.2021.08.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/19/2021] [Accepted: 08/03/2021] [Indexed: 12/12/2022]
Abstract
Cellulases play a promising role in the bioconversion of renewable lignocellulosic biomass into fermentable sugars which are subsequently fermented to biofuels and other value-added chemicals. Besides biofuel industries, they are also in huge demand in textile, detergent, and paper and pulp industries. Low titres of cellulase production and processing are the main issues that contribute to high enzyme cost. The success of ethanol-based biorefinery depends on high production titres and the catalytic efficiency of cellulases functional at elevated temperatures with acid/alkali tolerance and the low cost. In view of their wider application in various industrial processes, stable cellulases that are active at elevated temperatures in the acidic-alkaline pH ranges, and organic solvents and salt tolerance would be useful. This review provides a recent update on the advances made in thermostable cellulases. Developments in their sources, characteristics and mechanisms are updated. Various methods such as rational design, directed evolution, synthetic & system biology and immobilization techniques adopted in evolving cellulases with ameliorated thermostability and characteristics are also discussed. The wide range of applications of thermostable cellulases in various industrial sectors is described.
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Carboxymethyl Cellulase (CMCase) from UV-irradiation Mutated Bacillus cereus FOA-2 cultivated on Plantain (Musa parasidiaca) Stalk-based Medium: Production, Purification and Characterization. SCIENTIFIC AFRICAN 2021. [DOI: 10.1016/j.sciaf.2020.e00691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Shah F, Mishra S. In vitro optimization for enhanced cellulose degrading enzyme from Bacillus licheniformis KY962963 associated with a microalgae Chlorococcum sp. using OVAT and statistical modeling. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-03697-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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5
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Barbosa KL, Malta VRDS, Machado SS, Leal Junior GA, da Silva APV, Almeida RMRG, da Luz JMR. Bacterial cellulase from the intestinal tract of the sugarcane borer. Int J Biol Macromol 2020; 161:441-448. [PMID: 32526296 DOI: 10.1016/j.ijbiomac.2020.06.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 05/01/2020] [Accepted: 06/05/2020] [Indexed: 10/24/2022]
Abstract
Cellulolytic enzymes have wide use in several industrial segments (e.g. biofuels, pulp and paper, food, and cosmetics). However, one of the challenges is their large-scale production with high specific activity to eliminate the dependence of the purchase of enzymatic cocktails produced by commercial parties. The aims of this study were (1) isolation, selection, and partial characterization of bacterial cellulases present in the intestinal tract of the sugarcane borer and (2) to identify cellulase-producing bacteria by analyzing the 16S rDNA gene. Cellulase production and purification assays resulted in similar electrophoretic profiles between four bacterial strains. These strains were identified as Klebsiella pneumoniae, Klebsiella sp., and Bacillus sp. K. pneumoniae was the main cellulase-producing microorganism. Our results show the possibility of finding cellulolytic microorganisms that inhabit the gut of herbivorous animals, especially those that are predators of important crops of economic value. Furthermore, K. pneumoniae cellulase is of medical importance. In hospitals, health professionals, hospital technicians, patients and visitors wear clothes containing cellulose. Thus, K. pneumoniae within hospitals can contaminate these clothes and be spread to the environment. In that case, it would be important for the hospital's chemical sterilization products to have at least one cellulase inhibitor.
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Affiliation(s)
- Kledson Lopes Barbosa
- Federal University of Alagoas, Institute of Chemistry and Biotechnology, Campus Maceió, 57072-900 Maceió, AL, Brazil.
| | | | - Sonia Salgueiro Machado
- Federal University of Alagoas, Institute of Chemistry and Biotechnology, Campus Maceió, 57072-900 Maceió, AL, Brazil
| | | | | | | | - Jose Maria Rodrigues da Luz
- Federal University of Alagoas, Institute of Pharmaceutical Science, Postgraduate Multicenter Program of Biochemistry and Molecular Biology, Campus Maceió, 57072-900 Maceió, AL, Brazil
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Abd Elhameed E, Sayed ARM, Radwan TEE, Hassan G. Biochemical and Molecular Characterization of Five Bacillus Isolates Displaying Remarkable Carboxymethyl Cellulase Activities. Curr Microbiol 2020; 77:3076-3084. [PMID: 32710168 DOI: 10.1007/s00284-020-02135-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 07/15/2020] [Indexed: 12/11/2022]
Abstract
Cellulases have many useful applications in industry and biotechnology. So, identification of new bacterial strains expressing cellulases with better properties is desired. Five soil bacterial strains screened for high carboxymethyl cellulase (CMCase) activities were characterized and identified by 16S rRNA analysis as Bacillus amyloliquefaciens (FAY088), B. velezensis (FAY0103), B. tequilensis (FAY0117), B. subtilis (FAY0136), and B. subtilis (FAY0182). Their CMCase activities were 1.49, 1.26, 1.21, 1.21, and 1.24 U/ml, respectively. The maximum CMCase production was attained by growth at 35 °C, pH 6, and 180 rpm for 5 days. Residual activities of CMCases from FAY088 and FAY0117 were 88% or more after growth at 40 °C, which is same as FAY0182 CMCase at 40 and 45 °C. Additionally, FAY0182 retained 73% residual activity at 50 °C. FAY088 and FAY0182 retained more than 85% at pH 7 and 8. Conversely, residual activities from FAY0103 and FAY0136 declined a lot by increasing growth temperature beyond 40 °C and pH beyond 7. The maximum CMCase stability in all isolates was observed at pH 7, 3-h incubation, and 40 °C except for FAY0103 CMCase showed optimum temperature at 30 °C. More than 70% CMCase stability was retained in case of FAY088 at 50 °C, FAY0117 at 50-70 °C, and FAY0136 at 50-60 °C. FAY088 CMCase seemed to be the lest sensitive to temperature variation as it displayed residual activities 67, 72, 78, 84, 77, 74, and 72% at pH 3, 4, 5, 6, 8, 9, and 10, respectively. Finally, the five CMCase-producing isolates are recommended further enzyme applications in biotechnology and industry.
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Affiliation(s)
- Esraa Abd Elhameed
- Chemistry Department, Faculty of Science, Fayoum University, Fayoum, 63514, Egypt
| | - Alaa R M Sayed
- Chemistry Department, Faculty of Science, Fayoum University, Fayoum, 63514, Egypt. .,College of Pharmacy, University of Florida, Orlando, FL, 32827, USA.
| | - Tharwat E E Radwan
- Botany Department, Faculty of Science, Fayoum University, Fayoum, 63514, Egypt
| | - Gamal Hassan
- Genetics Department, Faculty of Agriculture, Fayoum University, Fayoum, 63514, Egypt
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Falade AO, Mabinya LV, Okoh AI, Nwodo UU. Studies on peroxidase production and detection of Sporotrichum thermophile-like catalase-peroxidase gene in a B acillus species isolated from Hogsback forest reserve, South Africa. Heliyon 2020; 5:e03012. [PMID: 31890960 PMCID: PMC6926187 DOI: 10.1016/j.heliyon.2019.e03012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/22/2019] [Accepted: 12/06/2019] [Indexed: 11/26/2022] Open
Abstract
This study sought to determine the process conditions for optimum peroxidase production by a Bacillus species (Bacillus sp. FALADE-1-KX640922) isolated from Hogsback forest reserve in South Africa and characterize the peroxidase gene in the bacteria. We optimized peroxidase production by manipulating the environmental and nutritional parameters under submerged fermentation. Subsequently, the gene encoding heme-peroxidase was determined through nested polymerase chain reaction and Sanger DNA sequencing. The studied bacteria had maximum peroxidase production at pH 8, 30 °C and 150 rpm. The addition of guaiacol to lignin fermentation medium enhanced peroxidase production by over 100 % in the studied bacteria. However, the other lignin monomers (veratryl alcohol, vanillin, vanillic acid and ferulic acid) repressed the enzyme activity. Modification of the fermentation medium with ammonium sulphate gave the maximum peroxidase yield (8.87 U mL−1). Under the predetermined culture conditions, Bacillus sp. FALADE-1 expressed maximum specific peroxidase activity at 48 h (8.32 U mg−1). Interestingly, a search of the sequenced gene in PeroxiBase showed 100% similarity to Sporotrichum thermophile catalase-peroxidase gene (katG), as well, the deduced protein sequence clustered with bacterial catalase-peroxidases and had a molecular weight of about 11.45 kDa with 7.01 as the estimated isoelectric point. Subsequently, the nucleotide sequence was deposited in the National Center for Biotechnology Information (NCBI) repository with the accession number MF407314. In conclusion, Bacillus sp. FALADE-1 is a promising candidate for improved peroxidase production.
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Affiliation(s)
- Ayodeji O. Falade
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Private Bag X1314, Alice, 5700, Eastern Cape, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314, Alice, 5700, Eastern Cape, South Africa
- Department of Biochemistry, University of Medical Sciences, Ondo, 351101, Ondo State, Nigeria
- Corresponding author.
| | - Leonard V. Mabinya
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Private Bag X1314, Alice, 5700, Eastern Cape, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314, Alice, 5700, Eastern Cape, South Africa
| | - Anthony I. Okoh
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Private Bag X1314, Alice, 5700, Eastern Cape, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314, Alice, 5700, Eastern Cape, South Africa
| | - Uchechukwu U. Nwodo
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Private Bag X1314, Alice, 5700, Eastern Cape, South Africa
- Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Private Bag X1314, Alice, 5700, Eastern Cape, South Africa
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8
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Saccharification of Parthenium hysterophorus biomass using cellulase from Streptomyces sp. NAA2. ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01459-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Sahoo K, Sahoo RK, Gaur M, Subudhi E. Cellulolytic thermophilic microorganisms in white biotechnology: a review. Folia Microbiol (Praha) 2019; 65:25-43. [DOI: 10.1007/s12223-019-00710-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 04/15/2019] [Indexed: 10/26/2022]
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Genomically Defined Paenibacillus polymyxa ND24 for Efficient Cellulase Production Utilizing Sugarcane Bagasse as a Substrate. Appl Biochem Biotechnol 2018; 187:266-281. [PMID: 29926286 DOI: 10.1007/s12010-018-2820-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 06/11/2018] [Indexed: 12/29/2022]
Abstract
Cellulolytic bacteria from cattle rumen with ability to hydrolyze cellulose rich biomass were explored. The study selected Paenibacillus polymyxa ND24 from 847 isolates as the most potent strain, which can efficiently produce cellulase by utilizing sugarcane bagasse, rice straw, corn starch, CMC, and avicel as a sole carbon source. On annotation of P. polymyxa ND24 genome, 116 members of glycoside hydrolase (GH) family from CAZy clusters were identified and the presence of 10 potential cellulases was validated using protein folding information. Cellulase production was further demonstrated at lab-scale 5-L bioreactor exhibiting maximum endoglucanase activity up to 0.72 U/mL when cultivated in the medium containing bagasse (2% w/v) after 72 h. The bagasse hydrolysate so produced was further utilized for efficient biogas production. The presence of diverse hydrolytic enzymes and formidable cellulase activity supports the use of P. polymyxa ND24 for cost-effective bioprocessing of cellulosic biomass.
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Tura A, Montipó S, Fontana RC, Dillon AJ, Camassola M. ETHANOL PRODUCTION FROM SUGAR LIBERATED FROM Pinus SP. AND Eucalyptus SP. BIOMASS PRETREATED BY IONIC LIQUIDS. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2018. [DOI: 10.1590/0104-6632.20180352s20160645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Yadav P, Maharjan J, Korpole S, Prasad GS, Sahni G, Bhattarai T, Sreerama L. Production, Purification, and Characterization of Thermostable Alkaline Xylanase From Anoxybacillus kamchatkensis NASTPD13. Front Bioeng Biotechnol 2018; 6:65. [PMID: 29868578 PMCID: PMC5962792 DOI: 10.3389/fbioe.2018.00065] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Accepted: 05/01/2018] [Indexed: 11/21/2022] Open
Abstract
Anoxybacillus kamchatkensis NASTPD13 used herein as a source for thermostable alkaline xylanase were isolated from Paudwar Hot Springs, Nepal. NASTPD13 cultured at 60°C, pH 7 and in presence of inorganic (ammonium sulfate) or organic (yeast extract) nitrogen sources, produced maximum xylanase enzyme. Xylanase production in the cultures was monitored by following the ability of culture media to hydrolyze beech wood xylan producing xylooligosaccharide and xylose by thin layer chromatography (TLC). The extracellular xylanase was isolated from optimized A. kamchatkensis NASTPD13 cultures by ammonium sulfate (80%) precipitation; the enriched xylanase preparation was dialyzed and purified using Sephadex G100 column chromatography. The purified xylanaseshowed 11-fold enrichment with a specific activity of 33 U/mg and molecular weight were37 kDa based on SDS-PAGE and PAGE-Zymography. The optimum pH and temperature of purified xylanase was 9.0 and 65°C respectively retainingmore than 50% of its maximal activity over a broad range of pH (6–9) and temperature (30–65°C). With beech wood xylan, the enzyme showed Km 0.7 mg/ml and Vmax 66.64 μM/min/mg The xylanase described herein is a secretory enzyme produced in large quantities by NASTPD13 and is a novel thermostable, alkaline xylanase with potential biotechnological applications.
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Affiliation(s)
- Punam Yadav
- Molecular Biotechnology Unit, Nepal Academy of Science and Technology, Khumaltar, Nepal.,Central Department of Biotechnlogy, Tribhuvan University, Kirtipur, Nepal
| | - Jyoti Maharjan
- Molecular Biotechnology Unit, Nepal Academy of Science and Technology, Khumaltar, Nepal
| | - Suresh Korpole
- Microbial Type Culture Collection, Institute of Microbial Technology, Chandigarh, India
| | - Gandham S Prasad
- Microbial Type Culture Collection, Institute of Microbial Technology, Chandigarh, India
| | - Girish Sahni
- Microbial Type Culture Collection, Institute of Microbial Technology, Chandigarh, India
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Geobacillus and Anoxybacillus spp. from Terrestrial Geothermal Springs Worldwide: Diversity and Biotechnological Applications. EXTREMOPHILES IN EURASIAN ECOSYSTEMS: ECOLOGY, DIVERSITY, AND APPLICATIONS 2018. [DOI: 10.1007/978-981-13-0329-6_5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Menegol D, Scholl AL, Dillon AJP, Camassola M. Use of elephant grass (Pennisetum purpureum) as substrate for cellulase and xylanase production in solid-state cultivation by Penicillium echinulatum. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2017. [DOI: 10.1590/0104-6632.20170343s20150822] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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15
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Zukovski L, Fontana RC, Pauletti G, Camassola M, Dillon AJP. Fodder radish cake (Raphanus sativus L.) as an alternative biomass for the production of cellulases and xylanases in solid-state cultivation. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2017. [DOI: 10.1590/0104-6632.20170343s20150818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Rosmine E, Sainjan NC, Silvester R, Alikkunju A, Varghese SA. Statistical optimisation of xylanase production by estuarine Streptomyces sp. and its application in clarification of fruit juice. J Genet Eng Biotechnol 2017; 15:393-401. [PMID: 30647677 PMCID: PMC6296605 DOI: 10.1016/j.jgeb.2017.06.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 05/17/2017] [Accepted: 06/06/2017] [Indexed: 10/26/2022]
Abstract
Recently, xylanase has become an essential option for environmental friendly industrial biotechnological applications and the rising demand for its large scale production urge to take the advantage of statistical approach of optimization to investigate the interactive effects of prominent process factors involved to enhance xylanase production. In the present study, xylanase production from Streptomyces sp. strain ER1 isolated from Cochin estuarine soil; was optimised using statistical designs- Plackett-Burman and Central composite design. Plackett-Burman design was used to identify important fermentation condition factors affecting the xylanase production using beechwood xylan as the substrate. The optimum levels of these significant factors were determined employing the Central Composite Design. Out of the thirteen factors screened, concentration of beechwood xylan and olive oil, agitation speed, and inoculum age were recognized as the most significant factors. By analyzing the response surface plots and using numerical optimization method, the optimal levels for concentration of xylan and olive oil, agitation speed and inoculum age were determined as 0.37%, 33.10 mg/L, 42.87 RPM and 21.05 h, respectively. The optimised medium resulted in a 1.56-fold increased level of the xylanase (10,220 U/mL) production compared to the initial level (3986.444 U/mL) after 120 h of fermentation. The purified enzyme could successfully clarify orange, mousambi and pineapple juice to 20.87%, 23.64% and 27.89% respectively. Thus the present study has proved that Streptomyces sp. strain ER1 (KY449279) is a potential and useful organism for xylanase production and its purified enzyme could clarify the selected fruit juices.
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Affiliation(s)
- Emilda Rosmine
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, CUSAT, Kerala, India
| | | | - Reshma Silvester
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, CUSAT, Kerala, India
| | - Aneesa Alikkunju
- Department of Marine Biology, Microbiology and Biochemistry, School of Marine Sciences, CUSAT, Kerala, India
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Ekwealor CC, Odibo FJC, Onwosi CO. Partial Purification and Characterization of Cellulase Produced by <i>Bacillus sphaericus</i> CE-3. ACTA ACUST UNITED AC 2017. [DOI: 10.4236/aim.2017.74024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Optimization of Cellulase and Xylanase Production by Micrococcus Species under Submerged Fermentation. SUSTAINABILITY 2016. [DOI: 10.3390/su8111168] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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19
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Cellulolytic Activity of Thermophilic Bacilli Isolated from Tattapani Hot Spring Sediment in North West Himalayas. Indian J Microbiol 2016; 56:228-231. [PMID: 27570317 DOI: 10.1007/s12088-016-0578-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Accepted: 03/25/2016] [Indexed: 10/22/2022] Open
Abstract
Eight thermophilic bacterial strains were isolated from Tattapani Hot spring and screened for various hydrolytic enzymes including cellulases. The isolated bacterial strains were identified as Geobacillus thermodenitrificans IP_WH1(KP842609), Bacillus licheniformis IP_WH2(KP842610), B. aerius IP_WH3(KP842611), B. licheniformis IP_WH4(KP842612), B. licheniformis IP_60Y(KP842613), G. thermodenitrificans IP_60A1(KP842614), Geobacillus sp. IP_60A2(KP842615) and Geobacillus sp. IP_80TP(KP842616) after 16S ribotying. Out of the eight isolates Geobacillus sp. IP_80TP grew best at 80 °C whereas rest of the isolates showed optimal growth at 60 °C. G. thermodenitrificans IP_WH1 produced a thermotolerant cellulase with maximum activity at 60 °C.
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