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Sisa A, Martínez-Álvarez O, Gómez-Estaca J, Mosquera M. Valorization of Yellowfin Tuna Tails: From Proteolytic Enzyme Production to Gelatin and Antioxidant Hydrolysate Extraction. Foods 2024; 13:2034. [PMID: 38998540 PMCID: PMC11241796 DOI: 10.3390/foods13132034] [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: 06/03/2024] [Revised: 06/17/2024] [Accepted: 06/20/2024] [Indexed: 07/14/2024] Open
Abstract
This study investigates the valorization potential of yellowfin tuna (Thunnus albacares) tails to produce high-value commercial products. Firstly, the tuna tails were placed in a perforated stainless-steel cylinder, and hydraulic pressure was applied to separate the skin from the muscle in the tails. The extracted muscle was then utilized as a nitrogen source for the growth of the proteolytic enzyme producer Bacillus subtilis, while the skins were employed for gelatin extraction. The proteases from B. subtilis were partially purified and used to produce antioxidant peptides from the obtained gelatin. The gelatin formed a gel upon cooling, with gelling and melting temperatures of 16 °C and 22 °C, respectively, and a Bloom strength of approximately 160. Response Surface Methodology (RSM) was employed to determine the optimal hydrolysis conditions to achieve the highest antioxidant activity (35.96% measured as DPPH radical scavenging activity), which were 50 °C and 6.5 IU of enzyme. The findings emphasize the importance of an integrated approach to maximize the value of tuna by-products, promoting sustainability within the framework of a circular bioeconomy. Overall, these results contribute to the efficient utilization of tuna by-products, waste reduction, and enhanced economic viability of the tuna industry.
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Affiliation(s)
- Alisson Sisa
- Department of Food Science and Biotechnology (DECAB), Escuela Politécnica Nacional, Quito P.O. Box 17-01-2759, Ecuador
| | - Oscar Martínez-Álvarez
- Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), 6th José Antonio Novais St., 28040 Madrid, Spain
| | - Joaquín Gómez-Estaca
- Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), 6th José Antonio Novais St., 28040 Madrid, Spain
| | - Mauricio Mosquera
- Department of Food Science and Biotechnology (DECAB), Escuela Politécnica Nacional, Quito P.O. Box 17-01-2759, Ecuador
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2
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Hoffmann RG, Moraes GP, da Silva CB, Daroit DJ. Enzymatic processing of animal by-products: production of antioxidant hydrolysates with Bacillus sp. CL18 crude protease. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:26737-26746. [PMID: 38456978 DOI: 10.1007/s11356-024-32819-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 03/04/2024] [Indexed: 03/09/2024]
Abstract
Protein hydrolysates might display diverse bioactivities with potential relevance to human and animal health and food technology. Enzymatic hydrolysis of agro-industrial by-products is increasingly focused. In this study, a crude protease from Bacillus sp. CL18 was applied to obtain antioxidant protein hydrolysates from porcine, bovine, poultry, and fish by-products. The crude enzyme hydrolyzed all the twelve investigated by-products, as detected by increased soluble protein contents after 4 h of proteolysis. Hydrolysates exhibited higher radical-scavenging, Fe2+-chelating and reducing power capacities than non-hydrolyzed by-products. Hydrolysis times (0-8 h) and enzyme-to-substrate (E/S) ratios (384, 860, and 1,400 U/g) were assessed to produce antioxidant bovine lung hydrolysates. The highest E/S ratio accelerated both hydrolysis and increases in antioxidant activities; however, it did not result in bioactivities higher than hydrolysates obtained with the intermediate E/S ratio. Optimal antioxidant activities could be reached after 6 h of hydrolysis using 860 U/g. Animal by-products are interesting sources of bioactive protein hydrolysates, which could be produced with a non-commercial bacterial protease. This might represent a promising strategy for the valorization of animal by-products generated in large amounts by the agri-food sector.
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Affiliation(s)
- Rubia Godoy Hoffmann
- Programa de Pós-Graduação em Ambiente e Tecnologias Sustentáveis, Universidade Federal da Fronteira Sul (UFFS), Rua Jacob Reinaldo Haupenthal 1580, Campus Cerro Largo, 97900-000, Brazil
| | - Gabriela Poll Moraes
- Programa de Pós-Graduação em Ambiente e Tecnologias Sustentáveis, Universidade Federal da Fronteira Sul (UFFS), Rua Jacob Reinaldo Haupenthal 1580, Campus Cerro Largo, 97900-000, Brazil
| | - Carolina Becker da Silva
- Programa de Pós-Graduação em Ambiente e Tecnologias Sustentáveis, Universidade Federal da Fronteira Sul (UFFS), Rua Jacob Reinaldo Haupenthal 1580, Campus Cerro Largo, 97900-000, Brazil
| | - Daniel Joner Daroit
- Programa de Pós-Graduação em Ambiente e Tecnologias Sustentáveis, Universidade Federal da Fronteira Sul (UFFS), Rua Jacob Reinaldo Haupenthal 1580, Campus Cerro Largo, 97900-000, Brazil.
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3
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Sisa A, Sotomayor C, Buitrón L, Gómez-Estaca J, Martínez-Alvarez O, Mosquera M. Evaluation of by-products from agricultural, livestock and fishing industries as nutrient source for the production of proteolytic enzymes. Heliyon 2023; 9:e20735. [PMID: 37867804 PMCID: PMC10585220 DOI: 10.1016/j.heliyon.2023.e20735] [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: 03/15/2023] [Revised: 09/19/2023] [Accepted: 10/05/2023] [Indexed: 10/24/2023] Open
Abstract
This study presents an approach that utilizes low-value agro-industrial by-products as culture media for producing high-value proteolytic enzymes. The objective was to assess the impact of six agro-industrial by-products as culture media on the production of proteolytic enzymes. Bacillus subtilis strains, confirmed through comprehensive biochemical, morphological, and molecular analyses, were isolated and identified. Enzymatic activity was evaluated using azocasein and casein substrates, and the molecular sizes of the purified extract components were determined. The results demonstrated that the isolated bacteria exhibited higher metabolic and enzymatic activity when cultured in media containing 1 % soybean oil cake or feather meal. Furthermore, higher concentrations of the culture media were found to hinder the production of protease. Optimal protease synthesis on soybean oil cake and feather meal media was achieved after 4 days, using both the azocasein and casein methods. Semi-purification of the enzymatic extract obtained from Bacillus subtilis in feather meal and soybean oil cake resulted in a significant increase in azocaseinolytic and caseinolytic activities. Gel electrophoresis analysis revealed multiple bands in the fractions with the highest enzymatic activity in soybean oil cake, indicating the presence of various enzymes with varying molecular sizes. These findings highlight the potential of utilizing low-value agro-industrial by-products as efficient culture media for the sustainable and economically viable production of proteolytic enzymes with promising applications in various industries.
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Affiliation(s)
- Alisson Sisa
- Department of Food Science and Biotechnology, Escuela Politécnica Nacional, Quito, P.O. Box 17-01-2759, Ecuador
| | - Cristina Sotomayor
- Department of Food Science and Biotechnology, Escuela Politécnica Nacional, Quito, P.O. Box 17-01-2759, Ecuador
| | - Lucía Buitrón
- Department of Food Science and Biotechnology, Escuela Politécnica Nacional, Quito, P.O. Box 17-01-2759, Ecuador
| | - Joaquín Gómez-Estaca
- Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), 6 José Antonio Novais St., 28040, Madrid, Spain
| | - Oscar Martínez-Alvarez
- Institute of Food Science, Technology and Nutrition (ICTAN-CSIC), 6 José Antonio Novais St., 28040, Madrid, Spain
| | - Mauricio Mosquera
- Department of Food Science and Biotechnology, Escuela Politécnica Nacional, Quito, P.O. Box 17-01-2759, Ecuador
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4
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Kokwe L, Nnolim NE, Ezeogu LI, Sithole B, Nwodo UU. Thermoactive metallo-keratinase from Bacillus sp. NFH5: Characterization, structural elucidation, and potential application as detergent additive. Heliyon 2023; 9:e13635. [PMID: 36852054 PMCID: PMC9957710 DOI: 10.1016/j.heliyon.2023.e13635] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 02/01/2023] [Accepted: 02/06/2023] [Indexed: 02/15/2023] Open
Abstract
In recent times, robust green technological developments have advanced the goal of a circular economy by minimizing waste generation. The study was undertaken to explore the keratinolytic activity of chicken feather-degrading bacteria from South African soil. Isolates coded as SSN-01 and HSN-01 were identified as Bacillus sp. NFH5 and Bacillus sp. FHNM and their sequences were deposited in GenBank, with accession numbers MW165830.1 and MW165831.1, respectively. Extracellular enzyme production and thiol group generation by Bacillus sp. NFH5 peaked at 120 h with 1879.09 ± 88.70 U/mL and 9.49 ± 0.78 mM, respectively. Glutamic acid (4.44%), aspartic acid (3.50%), arginine (3.23%), glycine (2.61%), serine (2.08%), and proline (2.08%) were relatively higher in concentration. Keratinase (KerBAN) activity was highest at pH 8.0 and 90 °C but was inhibited by both EDTA and 1,10-phenanthroline. In addition, the keratinase-encoding gene (kerBAN) accessioned OK033360 had 362 amino acid residues, with molecular weight and theoretical isoelectric point of 39 kDa and 8.81, respectively. Findings from this study highlight the significance of Bacillus sp. NFH5 in the bio-recycling of recalcitrant keratinous wastes to protein hydrolysates - potential dietary supplements for livestock feeds. The properties of KerBAN underscore its application potential in green biotechnological processes.
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Affiliation(s)
- Lupho Kokwe
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, Private Bag X1314, 5700, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, 5700, South Africa
| | - Nonso E Nnolim
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, Private Bag X1314, 5700, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, 5700, South Africa
| | - Lewis I Ezeogu
- Department of Microbiology, Faculty of Biological Sciences, University of Nigeria, Nsukka, Nigeria
| | - Bruce Sithole
- The Biorefinery Industry Development Facility, Chemicals Cluster, Council for Scientific and Industrial Research, 359 Mazisi Kunene Road, 4001, Glenwood, Durban, South Africa
| | - Uchechukwu U Nwodo
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, Private Bag X1314, 5700, South Africa.,Applied and Environmental Microbiology Research Group (AEMREG), Department of Biochemistry and Microbiology, University of Fort Hare, Alice, 5700, South Africa
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Lermen AM, Clerici NJ, Borchartt Maciel D, Daroit DJ. Characterization and application of a crude bacterial protease to produce antioxidant hydrolysates from whey protein. Prep Biochem Biotechnol 2022; 53:12-21. [PMID: 35156901 DOI: 10.1080/10826068.2022.2033997] [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] [Indexed: 01/05/2023]
Abstract
Bacillus sp. CL14 crude protease was partially characterized and applied to obtain antioxidant whey protein isolate (WPI) hydrolysates. Optimal activity occurred at pH 9.0 and 60 °C. Ca2+, Mg2+, and Mn2+ (5 mM) enhanced activity (12-26%), whereas Co2+, Cu2+, Fe2+, and Zn2+ inhibited it (50-94%). At 1% (v/v), Tween 20 and Triton X-100 enhanced activities (21-27%), β-mercaptoethanol decreased it (15%), and dimethyl sulfoxide (DMSO) had no effect. Sodium dodecyl sulfate (SDS; 0.1%, w/v) increased activity by 36%. Complete inhibition by phenylmethylsulfonyl fluoride (PMSF), and 85% inhibition by ethylenediaminotetraacetic acid, indicates its serine protease character and the importance of cations for activity/stability. With 5 mM Ca2+, protease was optimally active at 65 °C and completely stable after 20 min at 40-55 °C. Crude protease preferentially hydrolyzed WPI and soy protein, followed by casein. WPI hydrolysis was then performed (55 °C, pH 9.0, 5 mM Ca2+) for 0-180 min. Contents of trichloroacetic acid (TCA)-soluble proteins in WPI hydrolysates (HWPI) increased from 29% (0 min) to 50-52% (60-180 min), accompanied by enhanced radical scavenging activity (14%, 0 min; ∼34%, 60-180 min) and Fe2+-chelating ability (56%, 0 min; ∼74%, 45-180 min). CL14 protease might represent an alternative biocatalyst to obtain antioxidant hydrolysates from WPI and, potentially, from other food proteins.
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Affiliation(s)
- Andréia Monique Lermen
- Laboratório de Microbiologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Naiara Jacinta Clerici
- Laboratório de Microbiologia, Universidade Federal da Fronteira Sul (UFFS), Cerro Largo, Brazil
| | | | - Daniel Joner Daroit
- Laboratório de Microbiologia, Universidade Federal da Fronteira Sul (UFFS), Cerro Largo, Brazil.,Programa de Pós-graduação em Ambiente e Tecnologias Sustentáveis, UFFS, Cerro Largo, Brazil
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Sypka M, Jodłowska I, Białkowska AM. Keratinases as Versatile Enzymatic Tools for Sustainable Development. Biomolecules 2021; 11:1900. [PMID: 34944542 PMCID: PMC8699090 DOI: 10.3390/biom11121900] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/14/2021] [Accepted: 12/17/2021] [Indexed: 02/07/2023] Open
Abstract
To reduce anthropological pressure on the environment, the implementation of novel technologies in present and future economies is needed for sustainable development. The food industry, with dairy and meat production in particular, has a significant environmental impact. Global poultry production is one of the fastest-growing meat producing sectors and is connected with the generation of burdensome streams of manure, offal and feather waste. In 2020, the EU alone produced around 3.2 million tonnes of poultry feather waste composed primarily of keratin, a protein biopolymer resistant to conventional proteolytic enzymes. If not managed properly, keratin waste can significantly affect ecosystems, contributing to environmental pollution, and pose a serious hazard to human and livestock health. In this article, the application of keratinolytic enzymes and microorganisms for promising novel keratin waste management methods with generation of new value-added products, such as bioactive peptides, vitamins, prion decontamination agents and biomaterials were reviewed.
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Affiliation(s)
| | | | - Aneta M. Białkowska
- Institute of Molecular and Industrial Biotechnology, Lodz University of Technology, Stefanowskiego 2/22, 90-537 Lodz, Poland; (M.S.); (I.J.)
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7
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da Rosa CE, Pinilla CMB, Stincone P, Pereira JQ, Varela APM, Mayer FQ, Brandelli A. Genomic characterization and production of antimicrobial lipopeptides by Bacillus velezensis P45 growing on feather by-products. J Appl Microbiol 2021; 132:2067-2079. [PMID: 34811844 DOI: 10.1111/jam.15363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 08/02/2021] [Accepted: 11/10/2021] [Indexed: 11/26/2022]
Abstract
AIMS To investigate the potential of novel Bacillus velezensis P45 as an eco-friendly alternative for bioprocessing poultry by-products into valuable antimicrobial products. METHODS AND RESULTS The complete genome of B. velezensis P45 was sequenced using the Illumina MiSeq platform, showing 4455 protein and 98 RNA coding sequences according to the annotation on the RAST server. Moreover, the genome contains eight gene clusters for the production of antimicrobial secondary metabolites and 25 putative protease-related genes, which can be related to feather-degrading activity. Then, in vitro tests were performed to determine the production of antimicrobial compounds using feather, feather meal and brain-heart infusion (BHI) cultures. Antimicrobial activity was observed in feather meal and BHI media, reaching 800 and 3200 AU ml-1 against Listeria monocytogenes respectively. Mass spectrometry analysis indicates the production of antimicrobial lipopeptides surfactin, fengycin and iturin. CONCLUSIONS The biotechnological potential of B. velezensis P45 was deciphered through genome analysis and in vitro studies. This strain produced antimicrobial lipopeptides growing on feather meal, a low-cost substrate. SIGNIFICANCE AND IMPACT OF STUDY The production of antimicrobial peptides by this keratinolytic strain may represent a sustainable alternative for recycling by-products from poultry industry. Furthermore, whole B. velezensis P45 genome sequence was obtained and deposited.
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Affiliation(s)
- Carolini Esmeriz da Rosa
- Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Paolo Stincone
- Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Jamile Queiroz Pereira
- Instituto Federal de Educação, Ciência e Tecnologia Farroupilha, Frederico Westphalen, Brazil
| | - Ana Paula Muterle Varela
- Departamento de Diagnóstico e Pesquisa Agropecuária, Secretaria de Agricultura, Pecuária e Desenvolvimento Rural Centro de Pesquisa em Saúde Animal, Instituto de Pesquisas Veterinárias Desidério Finamor, Eldorado do Sul, Brazil
| | - Fabiana Quoos Mayer
- Departamento de Diagnóstico e Pesquisa Agropecuária, Secretaria de Agricultura, Pecuária e Desenvolvimento Rural Centro de Pesquisa em Saúde Animal, Instituto de Pesquisas Veterinárias Desidério Finamor, Eldorado do Sul, Brazil
| | - Adriano Brandelli
- Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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8
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Saghian R, Mokhtari E, Aminzadeh S. Cohnella 1759 cysteine protease shows significant long term half-life and impressive increased activity in presence of some chemical reagents. Sci Rep 2021; 11:4573. [PMID: 33633359 PMCID: PMC7907070 DOI: 10.1038/s41598-021-84267-w] [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: 09/07/2020] [Accepted: 02/15/2021] [Indexed: 01/31/2023] Open
Abstract
Thermostability and substrate specificity of proteases are major factors in their industrial applications. rEla is a novel recombinant cysteine protease obtained from a thermophilic bacterium, Cohnella sp.A01 (PTCC No: 1921). Herein, we were interested in recombinant production and characterization of the enzyme and finding the novel features in comparison with other well-studied cysteine proteases. The bioinformatics analysis showed that rEla is allosteric cysteine protease from DJ-1/ThiJ/PfpI superfamily. The enzyme was heterologously expressed and characterized and the recombinant enzyme molecular mass was 19.38 kD which seems to be smaller than most of the cysteine proteases. rEla exhibited acceptable activity in broad pH and temperature ranges. The optimum activity was observed at 50℃ and pH 8 and the enzyme showed remarkable stability by keeping 50% of residual activity after 100 days storage at room temperature. The enzyme Km and Vmax values were 21.93 mM, 8 U/ml, respectively. To the best of our knowledge, in comparison with the other characterized cysteine proteases, rEla is the only reported cysteine protease with collagen specificity. The enzymes activity increases up to 1.4 times in the presence of calcium ion (2 mM) suggesting it as the enzyme's co-factor. When exposed to surfactants including Tween20, Tween80, Triton X-100 and SDS (1% and 4% v/v) the enzyme activity surprisingly increased up to 5 times.
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Affiliation(s)
- Rayan Saghian
- Bioprocess Engineering Group, Institute of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Elham Mokhtari
- Bioprocess Engineering Group, Institute of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Saeed Aminzadeh
- Bioprocess Engineering Group, Institute of Industrial and Environmental Biotechnology, National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.
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9
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Ben Elhoul M, Zaraî Jaouadi N, Bouacem K, Allala F, Rekik H, Mechri S, Khemir Ezzine H, Miled N, Jaouadi B. Heterologous expression and purification of keratinase from Actinomadura viridilutea DZ50: feather biodegradation and animal hide dehairing bioprocesses. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:9921-9934. [PMID: 33159682 DOI: 10.1007/s11356-020-11371-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 10/21/2020] [Indexed: 06/11/2023]
Abstract
The keratin-degrading bacterium Actinomadura viridilutea DZ50 secretes a keratinase (KERDZ) with potential industrial interest. Here, the kerDZ gene was extracellularly expressed in Escherichia coli BL21(DE3)pLysS using pTrc99A vector. The recombinant enzyme (rKERDZ) was purified and biochemically characterized. Results showed that the native and recombinant keratinases have similar biochemical characteristics. The conventional dehairing with lime and sodium sulfide degrades the hair to the extent that it cannot be recovered. Thus, these chemical processes become a major contributor to wastewater problem and create a lot of environmental concern. The complete dehairing was achieved with 2000 U/mL rKERDZ for 10 h at 40 °C. In fact, keratinase assisted dehairing entirely degraded chicken feather (45 mg) and removed wool/hair from rabbit, sheep, goat, or bovine' hides (1.6 kg) while preserving the collagen structure. The enzymatic process is the eco-friendly option that reduces biological (BOD) (50%) and chemical (COD) oxygen demands (60%) in leather processing. Consequently, the enzymatic hair removal process could solve the problem of post-treatments encountering the traditional leather processing. The enzymatic (rKERDZ) dehaired leather was analyzed by scanning electron microscopic (SEM) studies, which revealed similar fiber orientation and compactness compared with control sample. Those properties support that the rKERDZ enzyme-mediated process is greener to some extent than the traditional one.
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Affiliation(s)
- Mouna Ben Elhoul
- Laboratory of Microbial Biotechnology, Enzymatic, and Biomolecules (LMBEB), Centre of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, 3018, Sfax, Tunisia
- Biotech ECOZYM Start-up, Business Incubator, Centre of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, 3018, Sfax, Tunisia
| | - Nadia Zaraî Jaouadi
- Laboratory of Microbial Biotechnology, Enzymatic, and Biomolecules (LMBEB), Centre of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, 3018, Sfax, Tunisia
- Biotech ECOZYM Start-up, Business Incubator, Centre of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, 3018, Sfax, Tunisia
| | - Khelifa Bouacem
- Laboratory of Cellular and Molecular Biology (LCMB), Microbiology Team, Faculty of Biological Sciences, University of Sciences and Technology of Houari Boumediene (USTHB), P.O. Box 32, El Alia, Bab Ezzouar, 16111, Algiers, Algeria
| | - Fawzi Allala
- Laboratory of Cellular and Molecular Biology (LCMB), Microbiology Team, Faculty of Biological Sciences, University of Sciences and Technology of Houari Boumediene (USTHB), P.O. Box 32, El Alia, Bab Ezzouar, 16111, Algiers, Algeria
| | - Hatem Rekik
- Laboratory of Microbial Biotechnology, Enzymatic, and Biomolecules (LMBEB), Centre of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, 3018, Sfax, Tunisia
- Biotech ECOZYM Start-up, Business Incubator, Centre of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, 3018, Sfax, Tunisia
| | - Sondes Mechri
- Laboratory of Microbial Biotechnology, Enzymatic, and Biomolecules (LMBEB), Centre of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, 3018, Sfax, Tunisia
| | - Haifa Khemir Ezzine
- National Leather and Shoe Center (CNCC), 17, Road of leather, Z.I. Sidi Rezig, 2033, Ben Arous, Tunisia
| | - Neila Miled
- National Leather and Shoe Center (CNCC), 17, Road of leather, Z.I. Sidi Rezig, 2033, Ben Arous, Tunisia
| | - Bassem Jaouadi
- Laboratory of Microbial Biotechnology, Enzymatic, and Biomolecules (LMBEB), Centre of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, 3018, Sfax, Tunisia.
- Biotech ECOZYM Start-up, Business Incubator, Centre of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, 3018, Sfax, Tunisia.
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10
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Optimization of Keratinase Production and Utilization of Bacillus pumilus for Feather Degradation. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2020. [DOI: 10.22207/jpam.14.4.26] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Soil samples were collected from the feather dumped area where Bacillus pumilus was isolated and used for keratinase production and keratinolytic activity. In the optimization study, optimal condition for enzyme production was observed at 144 h, pH 7, temperature 37°C. The organism was utilized for feather degradation study. The maximum degradation of 57% was obtained at 37°C, pH 7 and 6 days incubation. The size of keratinase was determined by SDS- PAGE and was observed as 52 KDa.
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11
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Avcı A, Demir S, Akçay FA. Production, properties and some applications of protease from alkaliphilic Bacillus sp. EBTA6. Prep Biochem Biotechnol 2020; 51:803-810. [PMID: 33345694 DOI: 10.1080/10826068.2020.1858429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Extracellular protease production by a novel strain, Bacillus sp. EBTA6, has been optimized by using central composite design of response surface methodology and properties and industrial applications of crude enzyme have been investigated. Three independent variables (temperature, pH and yeast extract concentration) chosen in the experimental design were significant terms and reduced cubic model fit with the design at p < 0.0001 level. The recommended temperature, pH and yeast extract concentration were 30 °C, 8, and 15 g/L, respectively. Crude enzyme displayed activity over a wide pH and temperature ranges having the optimum at 50-60 °C and pH 8. It was quite stable at high pH values and at 50 °C. Amongst the metal ions (Mg+, Cu2+, Ca2+, Zn2+, K2+, and Sn2+), Ca2+ enhanced the activity and the others either decreased or did not change it. The enzyme activity was reduced by phenyl-methyl-sulfonyl fluoride (PMSF), and ethylene diamine tetra acetic acid (EDTA). The results revealed that the protease was serine alkaline type. Tween 20 and Tween 80 did not inhibit the enzyme, however, sodium dodecyl sulfate (SDS), reduced it by 39%. It completely removed blood stain in 20 min and coagulated milk in the presence of CaCl2.
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Affiliation(s)
- Ayşe Avcı
- Department of Food Engineering, Faculty of Engineering, Sakarya University, Serdivan, Sakarya, Turkey
| | - Selin Demir
- Department of Food Engineering, Faculty of Engineering, Sakarya University, Serdivan, Sakarya, Turkey
| | - Fikriye Alev Akçay
- Department of Food Engineering, Faculty of Engineering, Sakarya University, Serdivan, Sakarya, Turkey
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Nnolim NE, Udenigwe CC, Okoh AI, Nwodo UU. Microbial Keratinase: Next Generation Green Catalyst and Prospective Applications. Front Microbiol 2020; 11:580164. [PMID: 33391200 PMCID: PMC7775373 DOI: 10.3389/fmicb.2020.580164] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Accepted: 11/30/2020] [Indexed: 12/18/2022] Open
Abstract
The search for novel renewable products over synthetics hallmarked this decade and those of the recent past. Most economies that are prospecting on biodiversity for improved bio-economy favor renewable resources over synthetics for the potential opportunity they hold. However, this field is still nascent as the bulk of the available resources are non-renewable based. Microbial metabolites, emphasis on secondary metabolites, are viable alternatives; nonetheless, vast microbial resources remain under-exploited; thus, the need for a continuum in the search for new products or bio-modifying existing products for novel functions through an efficient approach. Environmental distress syndrome has been identified as a factor that influences the emergence of genetic diversity in prokaryotes. Still, the process of how the change comes about is poorly understood. The emergence of new traits may present a high prospect for the industrially viable organism. Microbial enzymes have prominence in the bio-economic space, and proteases account for about sixty percent of all enzyme market. Microbial keratinases are versatile proteases which are continuously gaining momentum in biotechnology owing to their effective bio-conversion of recalcitrant keratin-rich wastes and sustainable implementation of cleaner production. Keratinase-assisted biodegradation of keratinous materials has revitalized the prospects for the utilization of cost-effective agro-industrial wastes, as readily available substrates, for the production of high-value products including amino acids and bioactive peptides. This review presented an overview of keratin structural complexity, the potential mechanism of keratin biodegradation, and the environmental impact of keratinous wastes. Equally, it discussed microbial keratinase; vis-à-vis sources, production, and functional properties with considerable emphasis on the ecological implication of microbial producers and catalytic tendency improvement strategies. Keratinase applications and prospective high-end use, including animal hide processing, detergent formulation, cosmetics, livestock feed, and organic fertilizer production, were also articulated.
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Affiliation(s)
- Nonso E. Nnolim
- 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
| | - Chibuike C. Udenigwe
- School of Nutrition Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, ON, Canada
| | - Anthony I. Okoh
- 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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Exoproduction and characterization of a detergent-stable alkaline keratinase from Arthrobacter sp. KFS-1. Biochimie 2020; 177:53-62. [PMID: 32835736 DOI: 10.1016/j.biochi.2020.08.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 07/31/2020] [Accepted: 08/06/2020] [Indexed: 11/20/2022]
Abstract
Arthrobacter sp. KFS-1 previously isolated from a dump site was used to produce keratinase in basal medium. The physico-chemical conditions were optimized to enhance the keratinase production, and biochemical properties of the enzyme were also evaluated. Arthrobacter sp. KFS-1 optimally produced keratinase in a basal medium that contained 1.0 g/L xylose, 2.5-5.0 g/L chicken feather; with initial pH, incubation temperature and agitation speed of 6.0, 30 °C and 200 rpm, respectively. Maximum keratinase activity of 1559.09 ± 29.57 U/mL was achieved at 96 h of fermentation; while optimal thiol concentration of 665.13 ± 38.73 μM was obtained at 144 h. Furthermore, the enzyme was optimally active at pH 8.0 and 60 °C. The enzyme activity was inhibited by ethylene diamine tetraacetic acid and 1,10-phenanthroline, but not affected by phenylmethylsulfonyl floride. In addition, the crude enzyme retained 55%, 63%, 80%, 81% and 90% of the original activity after respective pretreatment with some commercial detergents (Maq, Omo, Surf, Sunlight and Ariel). Moreso, the enzyme showed remarkable stability in the presence of reducing agents, surfactants, and organic solvents. Arthrobacter sp. KFS-1 significantly produced keratinase which exhibited excellent stability in presence of chemical agents and commercial laundry detergents; hence, suggesting its industrial application potentials especially in detergent formulation.
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Nnolim NE, Okoh AI, Nwodo UU. Bacillus sp. FPF-1 Produced Keratinase with High Potential for Chicken Feather Degradation. Molecules 2020; 25:molecules25071505. [PMID: 32225031 PMCID: PMC7180861 DOI: 10.3390/molecules25071505] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 02/18/2020] [Accepted: 02/27/2020] [Indexed: 11/16/2022] Open
Abstract
Chicken feathers are predominantly composed of keratin; hence, valorizing the wastes becomes an imperative. In view of this, we isolated keratinase-producing bacteria and identified them through the 16S rDNA sequence. The process condition for keratinase activity was optimized, and electron micrography of the degradation timelines was determined. Keratinolytic bacteria were isolated and identified as Bacillus sp. FPF-1, Chryseobacterium sp. FPF-8, Brevibacillus sp. Nnolim-K2, Brevibacillus sp. FPF-12 and Brevibacillus sp. FSS-1; and their respective nucleotide sequences were deposited in GenBank, with the accession numbers MG214993, MG214994, MG214995, MG214996 and MG214999. The degree of feather degradation and keratinase concentration among the isolates ranged from 62.5 ± 2.12 to 86.0 ± 1.41(%) and 214.55 ± 5.14 to 440.01 ± 20.57 (U/mL), respectively. In the same vein, 0.1% (w/v) xylose, 0.5% (w/v) chicken feather, an initial fermentation pH of 5.0, fermentation temperature of 25 °C and an agitation speed of 150 rpm, respectively, served as the optimal physicochemical conditions for keratinase activity by Bacillus sp. FPF-1. The time course showed that Bacillus sp. FPF-1 yielded a keratinase concentration of 1698.18 ± 53.99(U/mL) at 120 h. The electron microscopic imaging showed completely structural dismemberment of intact chicken feather. Bacillus sp. FPF-1 holds great potential in the valorization of recalcitrant keratinous biomass from the agro sector into useful products.
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Affiliation(s)
- Nonso E. Nnolim
- SA-MRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700 Eastern Cape, South Africa; (A.I.O.); (U.U.N.)
- 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
- Correspondence: ; Tel.: +27-406-022-693
| | - Anthony I. Okoh
- SA-MRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700 Eastern Cape, South Africa; (A.I.O.); (U.U.N.)
- 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
- SA-MRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700 Eastern Cape, South Africa; (A.I.O.); (U.U.N.)
- 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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Hou Y, Lu F, Tian J, Tian Y. Cloning, Heterologous Expression and Characterization of an Intracellular Serine Protease from Bacillus sp. LCB10. APPL BIOCHEM MICRO+ 2019. [DOI: 10.1134/s0003683819050168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Adelere IA, Lateef A. Degradation of Keratin Biomass by Different Microorganisms. KERATIN AS A PROTEIN BIOPOLYMER 2019. [DOI: 10.1007/978-3-030-02901-2_5] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Callegaro K, Welter N, Daroit DJ. Feathers as bioresource: Microbial conversion into bioactive protein hydrolysates. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.09.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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De Oliveira CT, Pereira JQ, Brandelli A, Daroit DJ. Prospecting soil bacteria from subtropical Brazil for hydrolases production. Biologia (Bratisl) 2017. [DOI: 10.1515/biolog-2017-0025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sobucki L, Ramos RF, Daroit DJ. Protease production by the keratinolytic Bacillus sp. CL18 through feather bioprocessing. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:23125-23132. [PMID: 28828755 DOI: 10.1007/s11356-017-9876-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Accepted: 07/31/2017] [Indexed: 06/07/2023]
Abstract
Bacillus sp. CL18 was investigated to propose a bioprocess for protease production using feathers as organic substrate. In feather broth (FB), containing feathers as sole organic substrate (1-100 g l-1), maximal protease production was observed at 30 g l-1 (FB30) after 6 days of cultivation, whereas increased feather concentrations negatively affected protease production and feather degradation. Protease production peaks were always observed earlier during cultivations than maximal feather degradation. In FB30, 80% of initial feathers mass were degraded after 7 days. Addition of glucose, sucrose, starch, yeast extract (2 g l-1), CaCl2, or MgCl2 (10 mmol l-1) to FB30 decreased protease production and feather degradation. FB30 supplementation with NH4Cl (1 g l-1) resulted in less apparent negative effects on protease production, whereas peptone (2 g l-1) increased protease yields earlier during cultivations (3 days). Through a central composite design employed to investigate the effects of peptone and NH4Cl (0.5-4.5 g l-1) on protease production and feather degradation, FB30 supplementation with peptone and NH4Cl (0.5-1.1 g l-1) increased protease production within a shorter cultivation time (5 days) and hastened complete feather degradation (6 days). Feather bioconversion concurs with sustainable production of value-added products.
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Affiliation(s)
- Lisiane Sobucki
- Laboratório de Microbiologia, Universidade Federal da Fronteira Sul (UFFS) - Campus Cerro Largo, Rua Jacob Reinaldo Haupenthal 1580, Cerro Largo, RS, 97900-000, Brazil
| | - Rodrigo Ferraz Ramos
- Laboratório de Microbiologia, Universidade Federal da Fronteira Sul (UFFS) - Campus Cerro Largo, Rua Jacob Reinaldo Haupenthal 1580, Cerro Largo, RS, 97900-000, Brazil
| | - Daniel Joner Daroit
- Laboratório de Microbiologia, Universidade Federal da Fronteira Sul (UFFS) - Campus Cerro Largo, Rua Jacob Reinaldo Haupenthal 1580, Cerro Largo, RS, 97900-000, Brazil.
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