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Lu M, Xu J, Wang Z, Wang Y, Wu J, Yang L. In silico mining and identification of a novel lipase from Paenibacillus larvae: Rational protein design for improving catalytic performance. Enzyme Microb Technol 2024; 179:110472. [PMID: 38889604 DOI: 10.1016/j.enzmictec.2024.110472] [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: 04/09/2024] [Revised: 06/11/2024] [Accepted: 06/12/2024] [Indexed: 06/20/2024]
Abstract
Lipases play a vital role in various biological processes, from lipid metabolism to industrial applications. However, the ever-evolving challenges and diverse substrates necessitate the continual exploration of novel high-performance lipases. In this study, we employed an in silico mining approach to search for lipases with potential high sn-1,3 selectivity and catalytic activity. The identified novel lipase, PLL, from Paenibacillus larvae subsp. larvae B-3650 exhibited a specific activity of 111.2 ± 5.5 U/mg towards the substrate p-nitrophenyl palmitate (pNPP) and 6.9 ± 0.8 U/mg towards the substrate olive oil when expressed in Escherichia coli (E. coli). Computational design of cysteine mutations was employed to enhance the catalytic performance of PLL. Superior stability was achieved with the mutant K7C/A386C/H159C/K108C (2M3/2M4), showing an increase in melting temperature (Tm) by 1.9°C, a 2.05-fold prolonged half-life at 45°C, and no decrease in enzyme activity. Another mutant, K7C/A386C/A174C/A243C (2M1/2M3), showed a 4.9-fold enhancement in specific activity without compromising stability. Molecular dynamics simulations were conducted to explore the mechanisms of these two mutants. Mutant 2M3/2M4 forms putative disulfide bonds in the loop region, connecting the N- and C-termini of PLL, thus enhancing overall structural rigidity without impacting catalytic activity. The cysteines introduced in mutant 2M1/2M3 not only form new intramolecular hydrogen bonds but also alter the polarity and volume of the substrate-binding pocket, facilitating the entry of large substrate pNPP. These results highlight an efficient in silico exploration approach for novel lipases, offering a rapid and efficient method for enhancing catalytic performance through rational protein design.
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Affiliation(s)
- Mengyao Lu
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Jiaqi Xu
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China.
| | - Ziyuan Wang
- Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311200, China
| | - Yong Wang
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Jianping Wu
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Lirong Yang
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China.
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2
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Adetunji AI, Erasmus M. Green Synthesis of Bioplastics from Microalgae: A State-of-the-Art Review. Polymers (Basel) 2024; 16:1322. [PMID: 38794516 PMCID: PMC11124873 DOI: 10.3390/polym16101322] [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: 04/09/2024] [Revised: 04/30/2024] [Accepted: 05/04/2024] [Indexed: 05/26/2024] Open
Abstract
The synthesis of conventional plastics has increased tremendously in the last decades due to rapid industrialization, population growth, and advancement in the use of modern technologies. However, overuse of these fossil fuel-based plastics has resulted in serious environmental and health hazards by causing pollution, global warming, etc. Therefore, the use of microalgae as a feedstock is a promising, green, and sustainable approach for the production of biobased plastics. Various biopolymers, such as polyhydroxybutyrate, polyurethane, polylactic acid, cellulose-based polymers, starch-based polymers, and protein-based polymers, can be produced from different strains of microalgae under varying culture conditions. Different techniques, including genetic engineering, metabolic engineering, the use of photobioreactors, response surface methodology, and artificial intelligence, are used to alter and improve microalgae stocks for the commercial synthesis of bioplastics at lower costs. In comparison to conventional plastics, these biobased plastics are biodegradable, biocompatible, recyclable, non-toxic, eco-friendly, and sustainable, with robust mechanical and thermoplastic properties. In addition, the bioplastics are suitable for a plethora of applications in the agriculture, construction, healthcare, electrical and electronics, and packaging industries. Thus, this review focuses on techniques for the production of biopolymers and bioplastics from microalgae. In addition, it discusses innovative and efficient strategies for large-scale bioplastic production while also providing insights into the life cycle assessment, end-of-life, and applications of bioplastics. Furthermore, some challenges affecting industrial scale bioplastics production and recommendations for future research are provided.
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Affiliation(s)
- Adegoke Isiaka Adetunji
- Centre for Mineral Biogeochemistry, University of the Free State, Bloemfontein 9301, South Africa
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3
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Tong Y, Li Y, Qin W, Wu S, Xu W, Jin P, Zheng Z. New insight into the metabolic mechanism of a novel lipid-utilizing and denitrifying bacterium capable of simultaneous removal of nitrogen and grease through transcriptome analysis. Front Microbiol 2023; 14:1258003. [PMID: 37965562 PMCID: PMC10642853 DOI: 10.3389/fmicb.2023.1258003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 10/17/2023] [Indexed: 11/16/2023] Open
Abstract
Introduction Issues related to fat, oil, and grease from kitchen waste (KFOG) in lipid-containing wastewater are intensifying globally. We reported a novel denitrifying bacterium Pseudomonas CYCN-C with lipid-utilizing activity and high nitrogen-removal efficiency. The aim of the present study was aim to explore the metabolic mechanism of the simultaneous lipid-utilizing and denitrifying bacterium CYCN-C at transcriptome level. Methods We comparatively investigated the cell-growth and nitrogen-removal performances of newly reported Pseudomonas glycinae CYCN-C under defined cultivation conditions. Transcriptome analysis was further used to investigate all pathway genes involved in nitrogen metabolism, lipid degradation and utilization, and cell growth at mRNA levels. Results CYCN-C could directly use fat, oil, and grease from kitchen waste (KFOG) as carbon source with TN removal efficiency of 73.5%, significantly higher than that (60.9%) with sodium acetate. The change levels of genes under defined KFOG and sodium acetate were analyzed by transcriptome sequencing. Results showed that genes cyo, CsrA, PHAs, and FumC involved in carbon metabolism under KFOG were significantly upregulated by 6.9, 0.7, 26.0, and 19.0-folds, respectively. The genes lipA, lipB, glpD, and glpK of lipid metabolic pathway were upregulated by 0.6, 0.4, 21.5, and 1.3-folds, respectively. KFOG also improved the denitrification efficiency by inducing the expression of the genes nar, nirB, nirD, and norR of denitrification pathways. Conclusion In summary, this work firstly provides valuable insights into the genes expression of lipid-utilizing and denitrifying bacterium, and provides a new approach for sewage treatment with reuse of KFOG wastes.
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Affiliation(s)
- Yaobin Tong
- School of Environmental & Resource, Zhejiang A & F University, Hangzhou, China
| | - Yiyi Li
- Zhejiang Sunda Public Environmental Protection Co., Ltd., Hangzhou, China
| | - Wenpan Qin
- Zhejiang Sunda Public Environmental Protection Co., Ltd., Hangzhou, China
| | - Shengchun Wu
- School of Environmental & Resource, Zhejiang A & F University, Hangzhou, China
- Zhejiang Sunda Public Environmental Protection Co., Ltd., Hangzhou, China
| | - Weiping Xu
- Zhejiang Sunda Public Environmental Protection Co., Ltd., Hangzhou, China
| | - Peng Jin
- College of Food and Health, Zhejiang A & F University, Hangzhou, China
| | - Zhanwang Zheng
- School of Environmental & Resource, Zhejiang A & F University, Hangzhou, China
- Zhejiang Sunda Public Environmental Protection Co., Ltd., Hangzhou, China
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Paz A, Zerva A, Topakas E. Evaluation of olive mill wastewater as culture medium to produce lipolytic enzymes by Bacillus aryabhattai BA03. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2023. [DOI: 10.1016/j.bcab.2023.102643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Production of Extracellular Lipase by Bacillus halotolerans from Oil-Contaminated Soil in a Pilot-Scale Submerged Bioreactor. Processes (Basel) 2022. [DOI: 10.3390/pr10081548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Microbial lipases are the biocatalyst of choice for the present and future because of their characteristics, including their ability to remain active as an enzyme throughout a broad pH, temperature, and substrate range. The goal of the current investigation was to find novel sources of substrates and isolates from soil contaminated by oil for the synthesis of lipase. On tributyrin media, 10 lipolytic bacterial strains that were isolated from oil-contaminated soil were grown. Using the zone of clearance, it was possible to identify the isolates with the highest activity. Following phylogenetic tree analysis, molecular characterization of the 16S rRNA sequence of the bacterial isolates revealed that it was Bacillus halotolerans (VSH 09). The enzyme was purified to near homogeneity. The enzyme activity was found to be optimum at a pH of 7.0 and a temperature of 35 °C. While Ni2+ and Cu2+ had no effect, the presence of Mg2+ and Ca2+ exhibited the highest levels of enzyme activity. At 1%, tributyrin as a substrate exhibited its highest level of activity. The molecular weight, as determined by SDS-PAGE, was found to be 38 kDa. The kinetics of the enzyme were found to be 41.66 and 9.37 mg/mL for Vmax and Km, respectively. The high yield of lipase produced by this method suggests that it holds potential for production on a large scale and could be used for various biotechnological applications.
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Statistical optimization of lipase production from oil mill effluent by Acinetobacter sp. KSPE71. JOURNAL OF THE SERBIAN CHEMICAL SOCIETY 2022. [DOI: 10.2298/jsc220119038k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The present study investigated the valorization of oil-rich residues of
coconut oil mill effluent (COME) as a potential growth medium for the
microbial production of extracellular lipase. The bacterial species isolated
from oil mill effluent, Acinetobacter sp. KSPE71 was tested for its
efficiency to grow and produce lipase in undiluted COME and 0.2 % yeast
extract and 0.2 % NH4Cl sup-plemented COME. In this connection, the process
parameters such as pH, temperature, agitation speed, and inoculum size were
optimized to maximize the production using a central composite design in the
Response surface methodology. At the optimized state of pH 7.5, 35 ?C, 150
rpm with 0.6 % inoculum size, a maximum of 3.95 U mL-1 activity was
obtained, four-fold higher than the basal condition. At this stage, 73 % of
the lipid content was degraded. The present work results imply that the oil
mill effluent can be used as a cheaper production medium for lipase and the
new isolate Acinetobacter sp. KSPE71 as a potential lipase producer. The
degradation of oil waste along with the production of the valuable product
has multiple advantages of cost reduction of lipase and environmental
concern.
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Pham VHT, Kim J, Chang S, Chung W. Investigation of Lipolytic-Secreting Bacteria from an Artificially Polluted Soil Using a Modified Culture Method and Optimization of Their Lipase Production. Microorganisms 2021; 9:2590. [PMID: 34946192 PMCID: PMC8708958 DOI: 10.3390/microorganisms9122590] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 11/16/2022] Open
Abstract
Compared to lipases from plants or animals, microbial lipases play a vital role in different industrial applications and biotechnological perspectives due to their high stability and cost-effectiveness. Therefore, numerous lipase producers have been investigated in a variety of environments in the presence of lipidic carbon and organic nitrogen sources. As a step in the development of cultivating the unculturable functional bacteria in this study, the forest soil collected from the surrounding plant roots was used to create an artificially contaminated environment for lipase-producing bacterial isolation. The ten strongest active bacterial strains were tested in an enzyme assay supplemented with metal ions such as Ca2+, Zn2+, Cu2+, Fe2+, Mg2+, K+, Co2+, Mn2+, and Sn2+ to determine bacterial tolerance and the effect of these metal ions on enzyme activity. Lipolytic bacteria in this study tended to grow and achieved a high lipase activity at temperatures of 35-40 °C and at pH 6-7, reaching a peak of 480 U/mL and 420 U/mL produced by Lysinibacillus PL33 and Lysinibacillus PL35, respectively. These potential lipase-producing bacteria are excellent candidates for large-scale applications in the future.
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Affiliation(s)
- Van Hong Thi Pham
- Department of Environmental Energy Engineering, Graduate School of Kyonggi University, Suwon 16227, Korea;
| | - Jaisoo Kim
- Department of Life Science, College of Natural Science of Kyonggi University, Suwon 16227, Korea;
| | - Soonwoong Chang
- Department of Environmental Energy Engineering, College of Creative Engineering of Kyonggi University, Suwon 16227, Korea
| | - Woojin Chung
- Department of Environmental Energy Engineering, College of Creative Engineering of Kyonggi University, Suwon 16227, Korea
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Amenaghawon AN, Odika P, Aiwekhoe SE. Optimization of nutrient medium composition for the production of lipase from waste cooking oil using response surface methodology and artificial neural networks. CHEM ENG COMMUN 2021. [DOI: 10.1080/00986445.2021.1980395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Priscilla Odika
- Department of Chemical Engineering, Faculty of Engineering, University of Benin, Benin City, Edo State, Nigeria
| | - Success Eghosa Aiwekhoe
- Department of Chemical Engineering, Faculty of Engineering, University of Benin, Benin City, Edo State, Nigeria
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9
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Adetunji AI, Olaniran AO. Production strategies and biotechnological relevance of microbial lipases: a review. Braz J Microbiol 2021; 52:1257-1269. [PMID: 33904151 PMCID: PMC8324693 DOI: 10.1007/s42770-021-00503-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 04/16/2021] [Indexed: 01/14/2023] Open
Abstract
Lipases are enzymes that catalyze the breakdown of lipids into long-chain fatty acids and glycerol in oil-water interface. In addition, they catalyze broad spectrum of bioconversion reactions including esterification, inter-esterification, among others in non-aqueous and micro-aqueous milieu. Lipases are universally produced from plants, animals, and microorganisms. However, lipases from microbial origin are mostly preferred owing to their lower production costs, ease of genetic manipulation etc. The secretion of these biocatalysts by microorganisms is influenced by nutritional and physicochemical parameters. Optimization of the bioprocess parameters enhanced lipase production. In addition, microbial lipases have gained intensified attention for a wide range of applications in food, detergent, and cosmetics industries as well as in environmental bioremediation. This review provides insights into strategies for production of microbial lipases for potential biotechnological applications.
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Affiliation(s)
- Adegoke Isiaka Adetunji
- Discipline of Microbiology, School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal (Westville campus), Private Bag X54001, Durban, 4000, Republic of South Africa.
| | - Ademola Olufolahan Olaniran
- Discipline of Microbiology, School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal (Westville campus), Private Bag X54001, Durban, 4000, Republic of South Africa
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Sahoo RK, Kumari KS, Sahoo S, Das A, Gaur M, Dey S, Mohanty S, Subudhi E. Bio-statistical optimization of lipase production by thermophilic Pseudomonas formosensis and its application on oral biofilm degradation. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.101969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Optimization of Lipase Production by Response Surface Methodology and Its Application for Efficient Biodegradation of Polyester vylon-200. Catal Letters 2021. [DOI: 10.1007/s10562-021-03603-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Abol-Fotouh D, AlHagar OEA, Hassan MA. Optimization, purification, and biochemical characterization of thermoalkaliphilic lipase from a novel Geobacillus stearothermophilus FMR12 for detergent formulations. Int J Biol Macromol 2021; 181:125-135. [PMID: 33766593 DOI: 10.1016/j.ijbiomac.2021.03.111] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/18/2021] [Accepted: 03/19/2021] [Indexed: 10/21/2022]
Abstract
This study was aimed to produce a high compatible thermoalkaliphilic lipase (TA) with detergents from new thermophilic bacterial strains utilizing fish wastes for industrial application. Among bacterial isolates, a new Geobacillus stearothermophilus FMR12 efficiently utilized fish wastes at a concentration of 20% (w/v), exhibiting highly lipolytic activity at extreme thermal and alkaline pH conditions. Optimized fermentation parameters of TA lipase production were ascertained, promoting the productivity of the TA lipase from 424 to 1038 U/ml. Purification results of TA lipase exposed prominent specific activity of 4788 U/mg, purification fold of 12.44, and 7.8% yield. The purified TA lipase demonstrated outstanding activity and stability in a temperature range of 40-95 °C and pH (4-11), revealing optimal activity at 70 °C and pH 9. The molecular weight of the enzyme was estimated to be 63 kDa. Compared to control, the TA lipase activity was promoted in the presence of calcium chloride. Likewise, Triton X-100 enhanced the activity of the TA lipase, recording 128% of the control enzyme. Interestingly, the TA lipase conserved higher than 90% of its activity after blending with commercial detergents, emphasizing its competence for detergent formulations.
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Affiliation(s)
- Deyaa Abol-Fotouh
- Electronic Materials Researches Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, P.O. Box: 21934, Alexandria, Egypt.
| | - Ola E A AlHagar
- Plant Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Inshas, Egypt
| | - Mohamed A Hassan
- Protein Research Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, P.O. Box: 21934, Alexandria, Egypt.
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13
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Yasin MT, Ali Y, Ahmad K, Ghani A, Amanat K, Basheir MM, Faheem M, Hussain S, Ahmad B, Hussain A, Bokhari SAI. Alkaline lipase production by novel meso-tolerant psychrophilic Exiguobacterium sp. strain (AMBL-20) isolated from glacier of northeastern Pakistan. Arch Microbiol 2020; 203:1309-1320. [PMID: 33325000 DOI: 10.1007/s00203-020-02133-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 11/15/2020] [Accepted: 11/19/2020] [Indexed: 11/30/2022]
Abstract
Lipase is an important commercial enzyme with unique and versatile biotechnological applications. This study was conducted to biosynthesize and characterizes alkaliphilic lipase by Exiguobacterium sp. strain AMBL-20T isolated from the glacial water samples of the northeastern (Gilgit-Baltistan) region of Pakistan. The isolated bacterium was identified as Exiguobaterium sp. strain AMBL-20T on the basis of morphological, biochemical, and phylogenetic analysis of 16S rRNA sequences with GenBank accession number MW229267. The bacterial strain was further screened for its lipolytic activity, biosynthesis, and characterization by different parameters with the aim of maximizing lipase activity. Results showed that 2% Olive oil, 0.2% peptone at 25 °C, pH 8, and 24 h of incubation time found optimal for maximum lipase production. The lipase enzyme was partially purified by ammonium sulphate precipitation and its activity was standardized at pH 8 under 30 °C temperature. The enzyme showed functional stability over a range of temperature and pH. Hence, extracellular alkaliphilic lipase from Exiguobacterium sp. is a potential candidate with extraordinary industrial applications, particularly in bio-detergent formulations.
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Affiliation(s)
- Muhammad Talha Yasin
- Department of Biotechnology, Quaid-i-Azam University, Islamabad, 45320, Pakistan.
| | - Yasir Ali
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, 44000, Pakistan
| | - Khurshid Ahmad
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, 44000, Pakistan
| | - Abdul Ghani
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, 44000, Pakistan
| | - Kinza Amanat
- Department of Microbiology, University of Agriculture, Faisalabad, 38000, Pakistan
| | - Muhammad Mudassir Basheir
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, 44000, Pakistan
| | - Muhammad Faheem
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, 44000, Pakistan
| | - Saddam Hussain
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, 44000, Pakistan
| | - Bashir Ahmad
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, 44000, Pakistan
| | - Adil Hussain
- Department of Biotechnology, University of Okara, Okara, 56130, Pakistan
| | - Syed Ali Imran Bokhari
- Department of Biological Sciences, International Islamic University Islamabad, Islamabad, 44000, Pakistan
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Abu ML, Mohammad R, Oslan SN, Salleh AB. The use of response surface methodology for enhanced production of a thermostable bacterial lipase in a novel yeast system. Prep Biochem Biotechnol 2020; 51:350-360. [PMID: 32940138 DOI: 10.1080/10826068.2020.1818256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A thermostable bacterial lipase from Geobacillus zalihae was expressed in a novel yeast Pichia sp. strain SO. The preliminary expression was too low and discourages industrial production. This study sought to investigate the optimum conditions for T1 lipase production in Pichia sp. strain SO. Seven medium conditions were investigated and optimized using Response Surface Methodology (RSM). Five responding conditions namely; temperature, inoculum size, incubation time, culture volume and agitation speed observed through Plackett-Burman Design (PBD) method had a significant effect on T1 lipase production. The medium conditions were optimized using Box-Behnken Design (BBD). Investigations reveal that the optimum conditions for T1 lipase production and Biomass concentration (OD600) were; Temperature 31.76 °C, incubation time 39.33 h, culture volume 132.19 mL, inoculum size 3.64%, and agitation speed of 288.2 rpm with a 95% PI low as; 12.41 U/mL and 95% PI high of 13.65 U/mL with an OD600 of; 95% PI low as; 19.62 and 95% PI high as; 22.62 as generated by the software was also validated. These predicted parameters were investigated experimentally and the experimental result for lipase activity observed was 13.72 U/mL with an OD600 of 24.5. At these optimum conditions, there was a 3-fold increase on T1 lipase activity. This study is the first to develop a statistical model for T1 lipase production and biomass concentration in Pichia sp. Strain SO. The optimized production of T1 lipase presents a choice for its industrial application.
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Affiliation(s)
- Mary Ladidi Abu
- Enzyme and Microbial Technology Research Centre, Universiti Putra Malaysia, Selangor, Malaysia.,Department of Biochemistry, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia, Selangor, Malaysia.,Department of Biochemistry, Faculty of Natural Sciences, Ibrahim Badamasi Babangida University Lapai, Niger State, Nigeria
| | - Rosfarizan Mohammad
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia, Selangor, Malaysia
| | - Siti Nurbaya Oslan
- Enzyme and Microbial Technology Research Centre, Universiti Putra Malaysia, Selangor, Malaysia.,Department of Biochemistry, Faculty of Biotechnology and Biomolecular Science, Universiti Putra Malaysia, Selangor, Malaysia.,Enzyme Technology Laboratory, Institute of Bioscience, Universiti Putra Malaysia, Selangor, Malaysia
| | - Abu Bakar Salleh
- Enzyme and Microbial Technology Research Centre, Universiti Putra Malaysia, Selangor, Malaysia
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Soumya P, Kochupurackal J. Pineapple Peel Extract as an Effective Substrate for Esterase Production from Bacillus subtilis E9. Curr Microbiol 2020; 77:3024-3034. [PMID: 32683467 DOI: 10.1007/s00284-020-02073-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 06/03/2020] [Indexed: 12/24/2022]
Abstract
Esterase, belonging to hydrolase class of enzymes catalyzes the cleavage and formation of ester bonds. Esterase producing isolates E9 and E46, isolated from pineapple waste enriched soil were identified as Bacillus subtilis E9 and Bacillus sp. E46 respectively. Bacillus subtilis E9 with 10 U/mg esterase activity in basal media was further chosen for media optimization studies. Several factors including the effect of organic solvents and fruit peel extracts were studied by one factor at a time optimization method and statistical models. An enhanced enzyme production of 250.50 U/mg could be obtained under the optimal conditions of pH 6.5, incubation time 25 h and 1.8%v/v of acetone extract of pineapple peel. The four-stage purification improved the purity of the enzyme by 1.5-fold with 5.3% recovery and specific activity of 384 U/mg. The monomeric nature and the molecular weight (45 KDa) of the enzyme were determined by performing SDS PAGE and its activity was confirmed by zymogram analysis. The substrate specificity of the purified fraction exhibited a higher activity towards lower chain length esters, indicating the enzyme as esterase. The partially purified esterase showed an optimal temperature of 40 °C at an optimum pH of 7. Km and Vmax of the enzyme were 1.12 mM and 1.18 mM of released pNP · min-1 respectively.
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16
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Statistical modelling and optimization of protease production by an autochthonous Bacillus aryabhattai Ab15-ES: A response surface methodology approach. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101528] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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17
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Adetunji AI, Olaniran AO. Production and characterization of bioemulsifiers from Acinetobacter strains isolated from lipid-rich wastewater. 3 Biotech 2019; 9:151. [PMID: 30944798 DOI: 10.1007/s13205-019-1683-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 03/15/2019] [Indexed: 11/28/2022] Open
Abstract
In this study, two indigenous bacterial strains (Ab9-ES and Ab33-ES) isolated from lipid-rich wastewater showed potential to produce bioemulsifier in the presence of 2% (v/v) olive oil as a carbon source. These bacterial strains were identified as Acinetobacter sp. Ab9-ES and Acinetobacter sp. Ab33-ES by polymerase chain reaction and analysis of 16S rRNA gene sequences. Bioemulsifier production by these strains was found to be growth-linked. Maximum emulsifying activities (83.8% and 80.8%) were recorded from strains Ab9-ES and Ab33-ES, respectively. Bioemulsifier yields of 4.52 g/L and 4.31 g/L were obtained from strains Ab9-ES (XB9) and Ab33-ES (YB33), respectively. Fourier-transform infrared spectroscopic analysis revealed the glycoprotein nature of the bioemulsifiers. The bioemulsifiers formed stable emulsions only in the presence of edible oils. Maximum emulsifying activities of 79.6% (XB9) and 67.9% (YB33) were recorded in the presence of sunflower oil. The bioemulsifiers were found to be stable at a broad range of temperature (4-121 °C), moderate pH (5.0-10.0) and salinity (1-6%). In addition, bioemulsifier XB9 showed maximum emulsifying activities (77.3%, 74.5%, and 74.9%) at optimum temperature (50 °C), pH (7.0), and NaCl concentration (3%), respectively. On the contrary, YB33 demonstrated highest activities (73.6%, 72%, and 61.2%) at optimum conditions of 70 °C, pH 7.0, and NaCl concentration of 5%, respectively. Findings from this study suggest the potential biotechnological applications of the bioemulsifiers, especially in the remediation of oil-polluted sites.
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Affiliation(s)
- Adegoke Isiaka Adetunji
- Discipline of Microbiology, School of Life Sciences, University of KwaZulu-Natal, (Westville Campus), Private Bag X54001, Durban, 4000 South Africa
| | - Ademola Olufolahan Olaniran
- Discipline of Microbiology, School of Life Sciences, University of KwaZulu-Natal, (Westville Campus), Private Bag X54001, Durban, 4000 South Africa
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18
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Mo J, Zhang Z, Wang Z, Yu Z, Li S, Jiang S, Liu H, Ao J. Isolation and identification of a psychrotolerant dimethyl phthalate-degrading bacterium from selected frozen soil of high-latitude areas in China and optimization of its fermentation conditions using response surface methodology. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2019.1696703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- Jixian Mo
- Heilongjiang Key Laboratory of Resistance Gene Engineering and Preservation of Biodiversity in Cold Areas, College of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, PR China
| | - Zhihong Zhang
- Laboratory of Rice Processing, Food Processing Institute, Heilongjiang Academy of Agricultural Sciences, Harbin, PR China
| | - Zhigang Wang
- Heilongjiang Key Laboratory of Resistance Gene Engineering and Preservation of Biodiversity in Cold Areas, College of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, PR China
| | - Zhidan Yu
- Heilongjiang Key Laboratory of Resistance Gene Engineering and Preservation of Biodiversity in Cold Areas, College of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, PR China
| | - Shanshan Li
- Heilongjiang Key Laboratory of Resistance Gene Engineering and Preservation of Biodiversity in Cold Areas, College of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, PR China
| | - ShaSha Jiang
- Heilongjiang Key Laboratory of Resistance Gene Engineering and Preservation of Biodiversity in Cold Areas, College of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, PR China
| | - Hening Liu
- Heilongjiang Key Laboratory of Resistance Gene Engineering and Preservation of Biodiversity in Cold Areas, College of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, PR China
| | - Jia Ao
- Heilongjiang Key Laboratory of Resistance Gene Engineering and Preservation of Biodiversity in Cold Areas, College of Life Science and Agriculture and Forestry, Qiqihar University, Qiqihar, PR China
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