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Majeed T, Lee CC, Orts WJ, Tabassum R, Shah TA, Jardan YAB, Dawoud TM, Bourhia M. Characterization of a thermostable protease from Bacillus subtilis BSP strain. BMC Biotechnol 2024; 24:49. [PMID: 39010004 PMCID: PMC11247832 DOI: 10.1186/s12896-024-00870-5] [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: 03/28/2024] [Accepted: 06/20/2024] [Indexed: 07/17/2024] Open
Abstract
This study used conservative one variable-at-a-time study and statistical surface response methods to increase the yields of an extracellular thermostable protease secreted by a newly identified thermophilic Bacillus subtilis BSP strain. Using conventional optimization techniques, physical parameters in submerged fermentation were adjusted at the shake flask level to reach 184 U/mL. These physicochemical parameters were further optimized by statistical surface response methodology using Box Behnken design, and the protease yield increased to 295 U/mL. The protease was purified and characterized biochemically. Both Ca2+ and Fe2+ increased the activity of the 36 kDa protease enzyme. Based on its strong inhibition by ethylenediaminetetracetate (EDTA), the enzyme was confirmed to be a metalloprotease. The protease was also resistant to various organic solvents (benzene, ethanol, methanol), surfactants (Triton X-100), sodium dodecyl sulfate (SDS), Tween 20, Tween-80 and oxidants hydrogen per oxide (H2O2). Characteristics, such as tolerance to high SDS and H2O2 concentrations, indicate that this protease has potential applications in the pharmaceutical and detergent industries.
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Affiliation(s)
- Tanveer Majeed
- Department of Biotechnology, Kinnaird College for Women, Lahore, Punjab, 54000, Pakistan.
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577, Jhang Road, Faisalabad, Pakistan.
| | - Charles C Lee
- Bioproducts Research Unit, USDA-ARS, 800 Buchanan St., Albany, CA, 94710, USA
| | - William J Orts
- Bioproducts Research Unit, USDA-ARS, 800 Buchanan St., Albany, CA, 94710, USA
| | - Romana Tabassum
- National Institute for Biotechnology and Genetic Engineering (NIBGE), P.O. Box 577, Jhang Road, Faisalabad, Pakistan
| | - Tawaf Ali Shah
- College of Agriculture Engineering and Food Sciences, Shandong University of Technology, Zibo, 255000, China.
| | - Yousef A Bin Jardan
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. Box 11451, Riyadh, Saudi Arabia
| | - Turki M Dawoud
- Department of Botany and Microbiology, College of Science, King Saud University, P. O. BOX 2455, Riyadh, 11451, Saudi Arabia
| | - Mohammed Bourhia
- Department of Chemistry and Biochemistry, Faculty of Medicine and Pharmacy, Ibn Zohr University, Laayoune, 70000, Morocco.
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Boro N, Alexandrino Fernandes P, Mukherjee AK. Computational analysis to comprehend the structure-function properties of fibrinolytic enzymes from Bacillus spp for their efficient integration into industrial applications. Heliyon 2024; 10:e33895. [PMID: 39055840 PMCID: PMC11269858 DOI: 10.1016/j.heliyon.2024.e33895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 06/28/2024] [Accepted: 06/28/2024] [Indexed: 07/28/2024] Open
Abstract
Background The fibrinolytic enzymes from Bacillus sp. are proposed as therapeutics in preventing thrombosis. Computational-based analyses of these enzymes' amino acid composition, basic physiological properties, presence of functional domain and motifs, and secondary and tertiary structure analyses can lead to developing a specific enzyme with improved catalytic activity and other properties that may increase their therapeutic potential. Methods The nucleotide sequences of fibrinolytic enzymes produced by the genus Bacillus and its corresponding protein sequences were retrieved from the NCBI database and aligned using the PRALINE programme. The varied physiochemical parameters and structural and functional analysis of the enzyme sequences were carried out with the ExPASy-ProtParam tool, MEME server, SOPMA, PDBsum tool, CYS-REC tool, SWISS-MODEL, SAVES servers, TMHMM program, GlobPlot, and peptide cutter software. The assessed in-silico data were compared with the published experimental results for validation. Results The alignment of sixty fibrinolytic serine protease enzymes (molecular mass 12-86 kDa) sequences showed 49 enzymes possess a conserved domain with a catalytic triad of Asp196, His242, and Ser569. The predicted instability and aliphatic indexes were 1.94-37.77, and 68.9-93.41, respectively, indicating high thermostability. The random coil means value suggested the predominance of this secondary structure in these proteases. A set of 50 amino acid residues representing motif 3 signifies the Peptidase S8/S53 domain that was invariably observed in 56 sequences. Additionally, 28 sequences have transmembrane helices, with two having the most disordered areas, and they pose 25 enzyme cleavage sites. A comparative analysis of the experimental work with the results of in-silico study put forward the characteristics of the enzyme sequences JF739176.1 and MF677779.1 to be considered when creating a potential mutant enzyme as these sequences are stable at high pH with thermostability and to exhibit αβ-fibrinogenase activity in both experimental and in-silico studies.
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Affiliation(s)
- Nitisha Boro
- Microbial Biotechnology and Protein Research Laboratory, Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur, 784028, Assam, India
| | - Pedro Alexandrino Fernandes
- LAQV@REQUIMTE, Departamento de Química e Bioquímica, Faculdade De Ciências, Universidade do Porto, Rua Do Campo Alegre S/N, 4169-007, Porto, Portugal
| | - Ashis K. Mukherjee
- Microbial Biotechnology and Protein Research Laboratory, Department of Molecular Biology and Biotechnology, Tezpur University, Tezpur, 784028, Assam, India
- Microbial Biotechnology and Protein Research Laboratory, Division of Life Sciences, Institute of Advanced Studies in Science and Technology, Vigyan Path, Garchuk, Paschim Boragaon, Guwahati, 781035, Assam, India
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Rajendhran HP, Vaidyanathan VK, Venkatraman S, Karthik P. Optimization of Enzymatic Hydrolysis by Protease Produced from Bacillus subtilis MTCC 2423 to Improve the Functional Properties of Wheat Gluten Hydrolysates. INTERNATIONAL JOURNAL OF FOOD SCIENCE 2024; 2024:5053510. [PMID: 38974710 PMCID: PMC11227950 DOI: 10.1155/2024/5053510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 05/17/2024] [Accepted: 05/25/2024] [Indexed: 07/09/2024]
Abstract
This study is aimed at investigating the reutilizing of gluten protein from the wheat processing industry by Bacillus subtilis MTCC 2423 protease to obtain gluten hydrolysates with high added value. Gluten protein hydrolysis using protease achieved a 34.07% degree of hydrolysis with 5% gluten protein, at a hydrolysis time of 2 h for 1000 U/mL at pH 8.0 and temperature of 40°C. Compared to the wheat gluten, the obtained hydrolysates exhibited enhanced functional attributes, including heightened solubility (43%), increased emulsifying activity (93.08 m2/g), and improved radical scavenging properties. Furthermore, these hydrolysates demonstrated enhanced antioxidant potential, as evidenced by elevated ABTS (2,2'-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) of 81.25% and DPPH (2,2-diphenyl-1-picrylhydrazyl) of 56.46% radical scavenging activities and also exhibited a higher α-amylase inhibitory effect of 33.98%. The enhancement in functional characteristics of wheat gluten hydrolysates was observed by Fourier transform infrared spectroscopy. The percentage of free amino acids obtained by protease-mediated hydrolysates increased significantly compared to the unhydrolyzed wheat, which was observed by high-performance liquid chromatography. These findings suggest that wheat gluten hydrolysates hold promising potential as functional and nutritional food ingredients in the food industry, owing to their enhanced functionalities and potential antioxidant and antidiabetic properties.
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Affiliation(s)
- Hari Prasath Rajendhran
- Integrated Bioprocess LaboratoryDepartment of BiotechnologySchool of BioengineeringSRM Institute of Science and Technology, Kattankulathur, Chennai, Tamil Nadu 603203, India
| | - Vinoth Kumar Vaidyanathan
- Integrated Bioprocess LaboratoryDepartment of BiotechnologySchool of BioengineeringSRM Institute of Science and Technology, Kattankulathur, Chennai, Tamil Nadu 603203, India
| | - Swethaa Venkatraman
- Integrated Bioprocess LaboratoryDepartment of BiotechnologySchool of BioengineeringSRM Institute of Science and Technology, Kattankulathur, Chennai, Tamil Nadu 603203, India
| | - Pothiyappan Karthik
- Department of Food TechnologyFaculty of EngineeringKarpagam Academy of Higher Education, Coimbatore 641021, India
- Centre for Food NanotechnologyKarpagam Academy of Higher Education, Coimbatore 641 021, India
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El-Shazly AI, Wahba MI, Abdelwahed NAM, Shehata AN. Immobilization of alkaline protease produced by Streptomyces rochei strain NAM-19 in solid state fermentation based on medium optimization using central composite design. 3 Biotech 2024; 14:161. [PMID: 38799268 PMCID: PMC11111645 DOI: 10.1007/s13205-024-04003-9] [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: 03/20/2024] [Accepted: 05/03/2024] [Indexed: 05/29/2024] Open
Abstract
This study evaluated Streptomyces rochei strain NAM-19 solid-state fermentation of agricultural wastes to produce alkaline protease. Alkaline protease production increased with flaxseed, rice bran, and cheese whey fermentation reaching 147 U/mL at 48 h. Statistical optimization of alkaline protease production was performed using the central composite design (CDD). Results of CDD and the optimization plot showed that 4.59 g/L flaxseed, 4.31 g/L rice bran, 4.17 mL cheese whey, and a vegetative inoculum size of 7.0% increased alkaline protease production by 27.2% reaching 186 U/mL. Using the 20-70% ammonium sulfate fractionation method, the optimally produced enzyme was partially purified to fivefold. The partially purified alkaline protease was then covalently immobilized on a biopolymer carrier, glutaraldehyde-polyethylene-imine-κ-carrageenan (GA-PEI-Carr), with 90% immobilization efficiency. Characterizations revealed that immobilization improved thermostability, reusability, optimum temperature, and sensitivity towards metal ions of the free enzyme. The optimal temperature for free and immobilized enzymes was 40 and 50 °C, respectively. Both enzymes had the same optimum pH of 10. Immobilization increased Km from 19.73 to 26.52 mM and Vmax from 56.7 to 62.5 mmol min-1L-1. The immobilized enzyme retained 35% of its initial activity at 70 °C, while the free enzyme retained only 5%. The immobilized enzyme kept 80% of its initial activity at the 20th cycle. After 7 weeks of storage, the free enzyme lost all its initial activity, whereas the immobilized enzyme retained 50%. The free and immobilized enzymes were able to hydrolyze gelatin, and azo-casein demonstrating different relative activity, 85, 80, 90 and 95%, respectively, compared to casein (100%).
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Affiliation(s)
- Asmaa I. El-Shazly
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries and Drugs Research Institute, National Research Centre, Cairo, Egypt
| | - Marwa I. Wahba
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries and Drugs Research Institute, National Research Centre, Cairo, Egypt
- Centre of Scientific Excellence-Group of Advanced Materials and Nanotechnology, National Research Centre, Cairo, Egypt
| | - Nayera A. M. Abdelwahed
- Chemistry of Natural and Microbial Products Department, Pharmaceutical Industries and Drugs Research Institute, National Research Centre, Cairo, Egypt
| | - Abeer N. Shehata
- Biochemistry Department, Biotechnology Research Institute, National Research Centre, Cairo, Egypt
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Qi N, Zhan X, Milmine J, Chang KH, Li J. A novel thermophilic strain of Bacillus subtilis with antimicrobial activity and its potential application in solid-state fermentation of soybean meal. Microbiol Spectr 2024; 12:e0278423. [PMID: 38376165 PMCID: PMC10986468 DOI: 10.1128/spectrum.02784-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 12/09/2023] [Indexed: 02/21/2024] Open
Abstract
Soybean meal (SBM) is the most important source of plant protein in animal feeds, containing around 41%-48% crude protein. Nevertheless, 70%-80% of these proteins is allergenic antigens that can have adverse implications for the gastrointestinal well-being of animals, especially to young animals. Microbial fermentation is one of the most cost-effective strategies used to reduce allergenic antigens from plant sources. In this study, we report the isolation and characterization of a novel probiotic Bacillus subtilis "L5" strain from lake mud. L5 demonstrated remarkable temperature tolerance across a broad temperature spectrum, thriving at 25°C, 37°C, and 50°C. In addition, antimicrobial assay revealed that L5 exhibits strong antimicrobial activity against Escherichia coli, effectively reducing or eliminating the growth of Gram-negative bacteria in SBM when fermented with L5. When applied to SBM fermentation, L5 efficiently reduced SBM antinutritional factors such as glycinin, β-conglycinin, trypsin inhibitor, phytic acid, neutral detergent fiber, and acid detergent fiber, which in turn results in an increase in crude protein content and the free amino acid concentration. Our findings on the probiotic and fermentation capabilities of L5 suggest that this novel bacterium has dual functions that make it a strong candidate for improving the nutrient values of feed via its role in fermentation.IMPORTANCESoybean meal (SBM), containing 41%-48% crude protein, is the most important source of plant protein in animal feeds. Unfortunately, 70%-80% of the proteins in SBM is allergenic antigens including trypsin inhibition, β-conglycinin, and conglycinin, which negatively affect intestine health and function. Microbial solid-state fermentation methods have been applied to animal feeds for decades, to eliminate antinutritional factors. Here, a novel potential probiotic Bacillus subtilis "L5" strain with high enzymatic activity and antimicrobial activity will be a great help to improve the quality and reproducibility of SBM fermentation.
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Affiliation(s)
- Nanshan Qi
- Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, China
- Department of Animal Biosciences, University of Guelph, Guelph, Canada
| | - Xiaoshu Zhan
- Department of Animal Biosciences, University of Guelph, Guelph, Canada
- Department of Life Science and Engineering, Foshan University, Foshan, Guangdong, China
| | - Joshua Milmine
- Department of Animal Biosciences, University of Guelph, Guelph, Canada
| | - Kai-Hsiang Chang
- Department of Animal Biosciences, University of Guelph, Guelph, Canada
| | - Julang Li
- Department of Animal Biosciences, University of Guelph, Guelph, Canada
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Khadka DB, Pahadi T, Aryal S, Karki DB. Partial purification and characterization of protease extracted from kinema. Heliyon 2024; 10:e27173. [PMID: 38463843 PMCID: PMC10923713 DOI: 10.1016/j.heliyon.2024.e27173] [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: 08/05/2023] [Revised: 02/20/2024] [Accepted: 02/26/2024] [Indexed: 03/12/2024] Open
Abstract
Proteases are large group of highly demanded enzymes having huge application in food and pharmaceutical industries. Numerous sources, including plants, microorganisms, and animals, can be used to obtain protease. Due to its affordability and safety consideration, fermented foods have recently attracted more attention as a source of microbial protease. The present study aimed to extract protease from kinema, partially purify the extracted protease following dialysis after precipitation with ammonium sulfate, and determine general characteristics of protease. The kinema having highest proteolysis activity after three days of control fermentation (Temperature 30±2 °C, RH 66 ± 2%) was taken for the study. About 2.45 fold of purification with overall recovery of 63.21% was achieved after precipitation with ammonium sulfate at 30-70% saturation level followed by dialysis of crude extracted protease. The dialysed kinema protease had specific activity of 7.90 U/mg. The enzyme remained actively functional across a wider pH (5-9) and temperature (40-60 °C) range. SDS-PAGE and Zymogram confirmed the presence of three major active bands respectively of 29.04 kDa, 36.09 kDa and 46.35 kDa in the kinema protease extract. The enzyme kinetics data on casein, fitted to Mechaelis Mentens' plots showed the protease had Vmax of 1.001 U/ml with corresponding Km value of 0.825 mg/ml. Metal ions such as iron, mercury and aluminium showed the inhibition effect whereas presence of sodium, zinc, and calcium shows the activation effect on protease performance. The enzyme was active over various natural substrates; showing maximal activity on casein, and subsequent to bovine serum albumin, gelatin, hemoglobin and whey protein respectively. Furthermore, molecular weight distribution of the protease extract and activity inhibition with ethylenediaminetetraacetic acid and phenylmethylsulfonyl fluoride, suggesting the protease from kinema could be a metal dependent serine protease or mixture of them.
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Affiliation(s)
- Dambar Bahadur Khadka
- Central Department of Food Technology, Tribhuvan University, Dharan, Nepal
- Central Campus of Technology, Tribhuvan University, Dharan, Nepal
| | - Tikaram Pahadi
- Central Campus of Technology, Tribhuvan University, Dharan, Nepal
| | - Sunil Aryal
- Central Department of Food Technology, Tribhuvan University, Dharan, Nepal
| | - Dhan Bahadur Karki
- Central Department of Food Technology, Tribhuvan University, Dharan, Nepal
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Sun B, Zou K, Zhao Y, Tang Y, Zhang F, Chen W, Tang X, Chang C, Zheng Y. The fermentation optimization for alkaline protease production by Bacillus subtilis BS-QR-052. Front Microbiol 2023; 14:1301065. [PMID: 38169798 PMCID: PMC10758460 DOI: 10.3389/fmicb.2023.1301065] [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: 09/24/2023] [Accepted: 11/20/2023] [Indexed: 01/05/2024] Open
Abstract
Introduction Proteases exhibit a wide range of applications, and among them, alkaline proteases have become a prominent area of research due to their stability in highly alkaline environments. To optimize the production yield and activity of alkaline proteases, researchers are continuously exploring different fermentation conditions and culture medium components. Methods In this paper, the fermentation conditions of the alkaline protease (EC 3.4.21.14) production by Bacillus subtilis BS-QR-052 were optimized, and the effect of different nutrition and fermentation conditions was investigated. Based on the single-variable experiments, the Plackett-Burman design was used to explore the significant factors, and then the optimized fermentation conditions, as well as the interaction between these factors, were evaluated by response surface methodology through the Box-Behnken design. Results and discussion The results showed that 1.03% corn syrup powder, 0.05% MgSO4, 8.02% inoculation volume, 1:1.22 vvm airflow rate, as well as 0.5% corn starch, 0.05% MnSO4, 180 rpm agitation speed, 36°C fermentation temperature, 8.0 initial pH and 96 h incubation time were predicted to be the optimal fermentation conditions. The alkaline protease enzyme activity was estimated to be approximately 1787.91 U/mL, whereas subsequent experimental validation confirmed it reached 1780.03 U/mL, while that of 500 L scale-up fermentation reached 1798.33 U/mL. This study optimized the fermentation conditions for alkaline protease production by B. subtilis through systematic experimental design and data analysis, and the activity of the alkaline protease increased to 300.72% of its original level. The established model for predicting alkaline protease activity was validated, achieving significantly higher levels of enzymatic activity. The findings provide valuable references for further enhancing the yield and activity of alkaline protease, thereby holding substantial practical significance and economic benefits for industrial applications.
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Affiliation(s)
- Biao Sun
- Zhejiang Cheery Bio-Technology Co., Ltd., Jiaxing, China
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, China
- Zhejiang Institute of Advanced Technology Chinese Academy of Sciences, Jiaxing, China
| | - Kai Zou
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, China
| | - Yingqing Zhao
- Sinochem Linyi Crop Nutrition Co., Ltd., Linyi, China
| | - Yinfang Tang
- Zhejiang Cheery Bio-Technology Co., Ltd., Jiaxing, China
| | - Fuming Zhang
- Zhejiang Cheery Bio-Technology Co., Ltd., Jiaxing, China
| | - Weijing Chen
- Zhejiang Institute of Advanced Technology Chinese Academy of Sciences, Jiaxing, China
| | - Xiaoting Tang
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, China
| | - Chenran Chang
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, China
| | - Yan Zheng
- College of Advanced Materials Engineering, Jiaxing Nanhu University, Jiaxing, China
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Li H, Zhang M, Zhang Y, Xu X, Zhao Y, Jiang X, Zhang R, Gui Z. Characterization of Cellulose-Degrading Bacteria Isolated from Silkworm Excrement and Optimization of Its Cellulase Production. Polymers (Basel) 2023; 15:4142. [PMID: 37896386 PMCID: PMC10610594 DOI: 10.3390/polym15204142] [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: 09/05/2023] [Revised: 09/28/2023] [Accepted: 10/07/2023] [Indexed: 10/29/2023] Open
Abstract
An abundance of refractory cellulose is the key limiting factor restricting the resource utilization efficiency of silkworm (Bombyx mori) excrement via composting. Screening for cellulose-degrading bacteria is likely to provide high-quality strains for the safe and rapid decomposition of silkworm excrement. In this study, bacteria capable of degrading cellulose with a high efficiency were isolated from silkworm excrement and the conditions for cellulase production were optimized. The strains were preliminarily screened via sodium carboxymethyl cellulose culture and staining with Congo red, rescreened via a filter paper enzyme activity test, and identified via morphological observation, physiological and biochemical tests, and phylogenetic analysis of the 16S rDNA sequence. Enzyme activity assay was performed using the 3,5-dinitrosalicylic acid method. DC-11, a highly cellulolytic strain, was identified as Bacillus subtilis. The optimum temperature and pH of this strain were 55 °C and 6, respectively, and the filter paper enzyme activity (FPase), endoglucanase activity (CMCase), and exoglucanase activity (CXase) reached 15.40 U/mL, 11.91 U/mL, and 20.61 U/mL. In addition, the cellulose degradation rate of the treatment group treated with DC-11 was 39.57% in the bioaugmentation test, which was significantly higher than that of the control group without DC-11 (10.01%). Strain DC-11 was shown to be an acid-resistant and heat-resistant cellulose-degrading strain, with high cellulase activity. This strain can exert a bioaugmentation effect on cellulose degradation and has the potential for use in preparing microbial inocula that can be applied for the safe and rapid composting of silkworm excrement.
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Affiliation(s)
- Hao Li
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (H.L.)
- Sericulture Resources Intensive Processing Laboratory, Sericulture Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Minqi Zhang
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (H.L.)
| | - Yuanhao Zhang
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (H.L.)
| | - Xueming Xu
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (H.L.)
| | - Ying Zhao
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (H.L.)
| | - Xueping Jiang
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (H.L.)
| | - Ran Zhang
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (H.L.)
- Sericulture Resources Intensive Processing Laboratory, Sericulture Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
| | - Zhongzheng Gui
- College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; (H.L.)
- Sericulture Resources Intensive Processing Laboratory, Sericulture Research Institute, Chinese Academy of Agricultural Sciences, Zhenjiang 212100, China
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Long J, Yu L, Huang L, Xia N, Teng J, Wei B. Isolation, identification, and community diversity of microorganisms during tank fermentation of Liupao tea. J Food Sci 2023; 88:4230-4246. [PMID: 37623914 DOI: 10.1111/1750-3841.16748] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 07/19/2023] [Accepted: 08/08/2023] [Indexed: 08/26/2023]
Abstract
Tank fermentation is a novel approach to fermenting teas; however, the species of microorganisms present remain unclear. The microbial community composition of Liupao tea at various stages of tank fermentation was analyzed using high-throughput sequencing. Sphingomonas, Aquabacterium, Pelomonas, Acinetobacter, Blastobotrys, Aspergillus, Debaryomyces, and Aureobasidium were the predominant genera, which is different from pile fermentation. Fifteen genera (including Lactobacillus, Debaryomyces, Candida, Allobaculum, Flavobacterium, Caulobacter, Blastobotrys, Aspergillus, and Rasamsonia) were identified as biomarkers. PICRUSt analysis predicted that the most abundant functional genes were related to metabolism of carbohydrates, amino acids, cofactors, vitamins, and other secondary metabolites. Using the pure culture method, 283 strains were isolated at various stages of fermentation, representing 20 genera and 29 species of bacteria, and 11 genera and 18 species of fungi. Most of the dominant Sphingomonas, Staphylococcus, Aspergillus, and Blastobotrys identified by sequencing were also isolated. Of these, Sphingomonas olei, Aspergillus luchuensis, Aspergillus niger, Aspergillus aculeatus, Aspergillus amstelodami, Blastobotrys adeninivorans, Candida metapsilosis, and Candida blankii were beneficial strains that might be used to ferment Liupao tea. This study provides a basis for the development of processing technologies and utilization of microbial strains in the production of dark teas. PRACTICAL APPLICATION: Microbial diversity in tank-fermented Liupao tea was reported for the first time. 8 microorganisms were the predominant genera. The species, functions and potential risks of microorganisms was revealed. We clarified the differences between tank and pile fermentation.
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Affiliation(s)
- Junyao Long
- Institute of Light Industry and Food Engineering, Guangxi University, Nanning, China
- Lushan County Agriculture and Rural Bureau, Ya'an, China
| | - Lian Yu
- Institute of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Li Huang
- Institute of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Ning Xia
- Institute of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Jianwen Teng
- Institute of Light Industry and Food Engineering, Guangxi University, Nanning, China
| | - Baoyao Wei
- Institute of Light Industry and Food Engineering, Guangxi University, Nanning, China
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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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11
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Alei A, Moradian F, Farhadi A, Rostami M. Identification, Isolation, Cloning, and Expression of a New Alkaline Serine Protease Gene from Native Iranian Bacillus sp. RAM 53 for Use in the Industry. Appl Biochem Biotechnol 2023; 195:5730-5746. [PMID: 37289418 DOI: 10.1007/s12010-023-04585-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/26/2023] [Indexed: 06/09/2023]
Abstract
Proteases are one of the most important and widely applicable proteolytic enzymes that are used in various industries. The aim of this study was to identify, isolate, characterize, and clone the new extracellular alkaline protease from the native bacterium Bacillus sp. RAM53 that was isolated from rice fields in Iran. In this study, first, the primary assay of protease production was performed. The bacteria were cultured in a nutrient broth culture medium at 37° C for 48 h, and then, the enzyme extraction was performed. Enzyme activity was measured by standard methods in the range of 20 to 60 °C and the range of pH 6.0 to 12. Degenerate primers were designed to alkaline protease gene sequences. The isolated gene was cloned into the pET28a+ vector, the positive clones were transferred to Escherichia coli BL21, and the expression of the recombinant enzyme was optimized. The results showed that the optimum temperature and pH of the alkaline protease were 40° C and 9.0, respectively, and were stable at 60° C for 3 h. The molecular weight of the recombinant enzyme was 40 kDa in SDS-PAGE. The recombinant alkaline protease was inhibited by the PMSF inhibitor, indicating that the enzyme was serine protease. The results showed that the sequence alignment of the enzyme gene with the other alkaline protease gene sequences related to Bacillus was 94% identity. The result of Blastx showed about 86% identity to the S8 peptidase family in Bacillus cereus and Bacillus thuringiensis and other Bacillus species. The enzyme may be useful for various industries.
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Affiliation(s)
- Aliakbar Alei
- Department of Basic Sciences, Sari Agricultural Sciences and Natural Resources University, P.O. Box 578, Mazandaran, Iran
| | - Fatemeh Moradian
- Department of Basic Sciences, Sari Agricultural Sciences and Natural Resources University, P.O. Box 578, Mazandaran, Iran.
| | - Ayoub Farhadi
- Department of Animal Sciences, Sari Agricultural Sciences and Natural Resources University, Mazandaran, Iran
| | - Mehdi Rostami
- Rice Research Institute of Iran, Mazandaran Branch, Agricultural Research, Education and Extension Organization, P.O. Box 145, Amol, Tehran, Iran
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12
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Huang J, Dai X, Chen X, Ali I, Chen H, Gou J, Zhuo C, Huang M, Zhu B, Tang Y, Liu J, Xu Y, Tang F, Xue J. Combined forage grass-microbial for remediation of strontium-contaminated soil. JOURNAL OF HAZARDOUS MATERIALS 2023; 450:131013. [PMID: 36863103 DOI: 10.1016/j.jhazmat.2023.131013] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/03/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
Enrichment plants were screened from six forage grasses in this study to establish a complete combined forage grass-microbial remediation system of strontium-contaminated soil, and microbial groups were added to the screened dominant forage grasses. The occurrence states of strontium in forage grasses were explored by the BCR sequential extraction method. The results showed that the annual removal rate of Sudan grass (Sorghum sudanense (Piper) Stapf.) reached 23.05% in soil with a strontium concentration of 500 mg·kg-1. Three dominant microbial groups: E, G and H, have shown good facilitation effects in co-remediation with Sudan grass and Gaodan grass (Sorghum bicolor × sudanense), respectively. When compared to the control, the strontium accumulation of forage grasses in kg of soil with microbial groups was increased by 0.5-4 fold. The optimal forage grass-microbial combination can theoretically repair contaminated soil in three years. The microbial group E was found to promote the transfer of the exchangeable state and the reducible state of strontium to the overground part of the forage grass. Metagenomic sequencing results showed that the addition of microbial groups increased Bacillus spp. in rhizosphere soil, enhanced the disease resistance and tolerance of forage grasses, and improved the remediation ability of forage grass-microbial combinations.
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Affiliation(s)
- Jiali Huang
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China
| | - Xueqi Dai
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China
| | - Xiaoming Chen
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China.
| | - Imran Ali
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China; Institute of Molecular Biology and Biotechnology, University of Lahore, Lahore, Pakistan
| | - Hao Chen
- Sichuan Institute of Atomic Energy, Chengdu 610101, Sichuan, P.R. China
| | - Jialei Gou
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China
| | - Chifu Zhuo
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China
| | - Min Huang
- Sichuan Institute of Atomic Energy, Chengdu 610101, Sichuan, P.R. China
| | - Bo Zhu
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China
| | - Yunlai Tang
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China
| | - Jikai Liu
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China
| | - Yuxuan Xu
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China
| | - Fanzhou Tang
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China
| | - Jiahao Xue
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P.R. China
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13
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Zaman U, Rehman KU, Khan SU, Badshah S, Hosny KM, Alghamdi MA, Hmid HK, Alissa M, Bukhary DM, Abdelrahman EA. Production, optimization, and purification of alkaline thermotolerant protease from newly isolated Phalaris minor seeds. Int J Biol Macromol 2023; 233:123544. [PMID: 36754264 DOI: 10.1016/j.ijbiomac.2023.123544] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/29/2023] [Accepted: 01/31/2023] [Indexed: 02/08/2023]
Abstract
The present work aims to purify and perform a preliminary analysis on a thermostable serine alkaline protease from a recently identified P. minor. The enzyme was purified 2.7-fold with a 12.4 % recovery using Sephadex G-100 chromatography, DEAE-cellulose, and ammonium sulphate precipitation. The isolated enzyme has a specific activity of 473 U/mg. The purified protease had a molecular mass of 29 kDa, and just one band was seen, which matched the band obtained using SDS-PAGE. High thermostability was demonstrated by the enzymes, which had half-lives of 31.79 and 6.0 min (a 5.3-fold improvement), enthalpies of denaturation (ΔH°) of 119.53 and 119.35 KJ mol-1, entropies of denaturation (ΔS°) of 32.96 and 41.11 J/mol·K, and free energies of denaturation (ΔG°) of 108.87 and 105.58 KJ mol-1 for the protease enzyme. Studies on the folding and stability of alkaline proteases are important since their use in biotechnology requires that they operate in settings of extreme pH and temperature. According to the kinetic and thermodynamic properties, the protease produced by P. minor is superior to that produced by other sources and previously described plants, and it might find utility in a variety of industrial fields.
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Affiliation(s)
- Umber Zaman
- Institute of Chemical Sciences, Gomal University, Dera Ismail Khan 29050, Pakistan
| | - Khalil Ur Rehman
- Institute of Chemical Sciences, Gomal University, Dera Ismail Khan 29050, Pakistan.
| | - Shahid Ullah Khan
- Department of Biochemistry, Women Medical and Dental College, Khyber Medical University KPK, Pakistan; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Syed Badshah
- Institute of Chemical Sciences, Gomal University, Dera Ismail Khan 29050, Pakistan
| | - Khaled M Hosny
- Department of Pharmaceutics, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| | - Majd A Alghamdi
- Department of Medical Analysis, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Hatem K Hmid
- Department of Clinical Biochemistry, Cairo Center for Laboratories, Cairo, Egypt
| | - Mohammed Alissa
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia
| | - Deena M Bukhary
- Department of Pharmaceutics, College of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Ehab A Abdelrahman
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia; Chemistry Department, Faculty of Science, Benha University, Benha 13518, Egypt.
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14
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Effect of Fermented Meat and Bone Meal–Soybean Meal Product on Growth Performance in Broilers. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation9010024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In this study, we screen the proteolytic activity of Bacillus species in meat and bone meal (MBM) and investigate the effects of fermented MBM–soybean meal products (FMSMPs) on the growth performance of broilers. In Trial 1, FMSMPs were fermented using four strains—Bacillus siamensis M3 (M3), B. velezensis M5 (M5), B. subtilis M6 (M6), and B. subtilis M20 (M20)—all of which presented more total peptides and higher degrees of hydrolysis (DH) than Bacillus subtilis var. natto N21 (N21). In Trial 2, 280 0-day-old Arbor Acres broilers, with equal numbers of both sexes, were randomly assigned into 5% fish meal (FM), MBM–soybean meal (MSM, as control), and N21, M3, M5, M6, and M20 FMSMP groups. The results demonstrated that the crude protein, total amino acids, alkaline protease, trichloroacetic acid–soluble nitrogen (TCA-SN), TCA-SN/total nitrogen, total peptides, DH, and free-hydroxyproline levels in the M6 group were greater than those in any other group (p < 0.05). Furthermore, the weight gain in the M6 group was superior to that of the FM and MSM groups in 0–21 and 0–35-day-old broilers (p < 0.05). In conclusion, B. subtilis M6 likely efficiently decomposes MSM to improve the protein properties and nutritional value of the product after fermentation. Supplementation with 5% FMSMP may promote weight gain in broilers.
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15
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Ren J, Deng L, Li C, Li Z, Dong L, Zhao J, Zhang J, Niu D. Evolution of antibiotic resistance genes and bacterial community during erythromycin fermentation residue composting. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 309:119746. [PMID: 35835274 DOI: 10.1016/j.envpol.2022.119746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 06/07/2022] [Accepted: 07/06/2022] [Indexed: 06/15/2023]
Abstract
The removal efficiency of antibiotic resistance genes (ARGs) is the biggest challenge for the treatment of erythromycin fermentation residue (EFR). In the current research, 0% (control), 10% (T1), and 30% (T2) spray-dried EFR were composted with bulking materials, consisting of cattle manure and maize straw, for 30 days. Environmental factors and bacterial community on the behaviors of ARGs were further investigated. Apart from the high levels of erythromycin, the electrical conductivities were also increased by 66.7% and 291.7% in the samples of T1 and T2, respectively. After 30 days of composting, total ARGs in the samples of control were decreased by 78.1%-91.2%, but those of T1 and T2 were increased 14.5-16.7- and 38.5-68.7-fold. ARGs related to ribosomal protection (erm) dominated the samples of T1 and T2 at D 13 and 30, especially that ermF accounted for more than 80% of the total ARGs. Furthermore, the results of bacterial community revealed that EFR promoted the growth of Proteobacteria and Bacteroidetes, but inhibited that of Actinobacteria, Verrucomicrobia and Chloroflexi. Network analysis revealed that the enriched ARGs had strong correlation with seven bacterial genera, including Halomonas, Oceanobacillus, and Alcaligenes, most of which are halotolerant. Above all, erythromycin combined with high salinity can have synergistic effect on the enrichment of ARGs and their hosts.
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Affiliation(s)
- Jianjun Ren
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
| | - Liujie Deng
- State Environmental Protection Antibiotic Mycelial Dreg Harmless Treatment and Resource Utilization Engineering Technology Center, Yili Chuanning Biotechnology Co., Ltd., Yili 835007, China
| | - Chunyu Li
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China
| | - Zhijie Li
- State Environmental Protection Antibiotic Mycelial Dreg Harmless Treatment and Resource Utilization Engineering Technology Center, Yili Chuanning Biotechnology Co., Ltd., Yili 835007, China
| | - Liping Dong
- State Environmental Protection Antibiotic Mycelial Dreg Harmless Treatment and Resource Utilization Engineering Technology Center, Yili Chuanning Biotechnology Co., Ltd., Yili 835007, China
| | - Jian Zhao
- Department of Forensic Pathology, Guangzhou Forensic Science Institute and Key Laboratory of Forensic Pathology, Ministry of Public Security, Guangzhou 510000, China
| | - Jin Zhang
- Hebei Cixin Environmental Technology Co., Ltd., Langfang 065600, China
| | - Dongze Niu
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China.
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16
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Chen Y, Qin F, Dong M. Dynamic Changes in Microbial Communities and Physicochemical Characteristics During Fermentation of Non-post Fermented Shuidouchi. Front Nutr 2022; 9:926637. [PMID: 35769377 PMCID: PMC9235352 DOI: 10.3389/fnut.2022.926637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 05/23/2022] [Indexed: 11/20/2022] Open
Abstract
Non-post fermented Shuidouchi is a Chinese spontaneously fermented soybean food with multifunctionality in human health. The functionality and safety of this plant-based food will be affected by the microorganisms during fermentation. In this study, microbial diversity was investigated using culture-dependent and culture-independent methods. The functional metabolites such as polyamines and alkylpyrazines were also determined at different time points during fermentation. We found that Bacillus was the most dominant microbe throughout the fermentation process, while the temperature was the most important influencing factor. During fermentation, the microbial diversity increased at a moderate temperature and decreased at a high temperature (52°C). High temperature caused the prosperity of the spore-producing bacteria such as Bacillus (more than 90% relative abundance in bacteria) and Aneurinibacillus (2% or so relative abundance in bacteria), and the inhibition of fungi. Furthermore, it was found by correlation analysis that the relative abundances of Bacillus and Aneurinibacillus were positively correlated with the relative content of amino acid metabolism pathway and the content of most alkylpyrazines and biogenic amines. Meanwhile, the relative abundances of many non-dominant bacteria were negatively correlated with the content of biogenic amines and positively correlated with the relative content of carbohydrate metabolism pathway. These effects were helpful to control the biogenic amine contents under the safety limits, increasing the alkylpyrazine type and product functionality. A two-stage temperature control strategy—a moderate temperature (35–42°C) first, then a high temperature (52°C)—was concluded from the spontaneous fermentation of non-post fermented Shuidouchi. This strategy could improve the safety of product by inhibiting or sterilizing the thermolabile microbes. The non-post fermented Shuidouchi product is rich in functional compounds such as polyamines and alkylpyrazines.
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Affiliation(s)
- Yuyong Chen
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
- Jiangsu Agri-Animal Husbandry Vocational College, Taizhou, China
| | - Feng Qin
- Jiangsu Agri-Animal Husbandry Vocational College, Taizhou, China
| | - Mingsheng Dong
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing, China
- *Correspondence: Mingsheng Dong,
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17
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Coban H. Production of protease with Bacillus megaterium DSM32: Partial characterisation of the enzyme and modelling of the production. ACTA ALIMENTARIA 2022. [DOI: 10.1556/066.2021.00255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
Proteases hold an important position in today's world commercial enzyme market. Among various microbial producer genera, Bacillus is leading the commercial protease production. However, industry is still actively looking for new microbial protease producers with distinctive properties. Therefore, this study was undertaken for the evaluation of protease production by Bacillus megaterium DSM 32 strain in terms of its protease productivity, calculation of various production kinetics, partial characterisation of the enzyme, and modelling the protease production process. As results, the highest protease activity, specific cellular protease production rate, and protease productivity were calculated as 255.42 U mL−1, 36.2514 U g−1, and 16.1313 U mL−1 h−1, respectively, in shake flask fermentations. Partial characterisation studies showed that the enzyme has 45 °C and pH 8 as optimum working conditions, and its activity increased by 24% with the addition of 5 mM Mn+2 to the reaction medium. Additionally, the enzyme showed high stability and kept almost full activity in a cell-free medium for 20 days at 4 °C. Furthermore, modified Gompertz model provided the best fit in describing protease production with the lowest error and high fit values.
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Affiliation(s)
- H.B. Coban
- Izmir International Biomedicine and Genome Institute, Dokuz Eylul University, Balcova, 35340, Izmir, Turkey
- Izmir Health Technologies Development and Accelerator (BioIzmir), Dokuz Eylul University, Balcova, 35340, Izmir, Turkey
- Izmir Biomedicine and Genome Center, Dokuz Eylul University, Balcova, 35340, Izmir, Turkey
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18
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Feather-Degrading Bacillus cereus HD1: Genomic Analysis and Its Optimization for Keratinase Production and Feather Degradation. Curr Microbiol 2022; 79:166. [PMID: 35460448 DOI: 10.1007/s00284-022-02861-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 03/29/2022] [Indexed: 01/15/2023]
Abstract
Keratinase is an important enzyme that is used to degrade feather wastes produced by poultry industries and slaughterhouses that accumulate rapidly over time. The search for keratinase-producing microorganisms is important to potentially substitute physicochemical treatments of feather waste. In this study, the genome of Bacillus cereus HD1 and its keratinolytic prowess was investigated. The whole-genome shotgun size is 5,668,864 bp consisting of 6083 genes, 69 tRNAs, and 10 rRNAs. The genomic analyses revealed 15 potential keratinase genes and other enzymes that might assist keratin degradation, such as disulfide reductase and cysteine dioxygenase. The optimal conditions for feather degradation and keratinase production by B. cereus HD1 such as incubation time, pH, temperature, yeast extract, and glycerol concentrations were determined to be 5 days, pH 8, 37 °C, 0.05% (w/v), and 0.1% (v/v), respectively. Under optimized conditions, B. cereus HD1 exhibited feather degradation of 65%, with bacterial growth and maximum keratinase activity of 1.3 × 1011 CFU/mL and 41 U/mL, respectively, after 5 days of incubation in a feather basal medium. The findings obtained from this study may facilitate further research into utilizing B. cereus HD1 as a prominent keratinolytic enzymes production host and warrant potential biotechnological applications.
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19
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Tatta ER, Imchen M, Moopantakath J, Kumavath R. Bioprospecting of microbial enzymes: current trends in industry and healthcare. Appl Microbiol Biotechnol 2022; 106:1813-1835. [PMID: 35254498 DOI: 10.1007/s00253-022-11859-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 02/15/2022] [Accepted: 02/26/2022] [Indexed: 12/13/2022]
Abstract
Microbial enzymes have an indispensable role in producing foods, pharmaceuticals, and other commercial goods. Many novel enzymes have been reported from all domains of life, such as plants, microbes, and animals. Nonetheless, industrially desirable enzymes of microbial origin are limited. This review article discusses the classifications, applications, sources, and challenges of most demanded industrial enzymes such as pectinases, cellulase, lipase, and protease. In addition, the production of novel enzymes through protein engineering technologies such as directed evolution, rational, and de novo design, for the improvement of existing industrial enzymes is also explored. We have also explored the role of metagenomics, nanotechnology, OMICs, and machine learning approaches in the bioprospecting of novel enzymes. Overall, this review covers the basics of biocatalysts in industrial and healthcare applications and provides an overview of existing microbial enzyme optimization tools. KEY POINTS: • Microbial bioactive molecules are vital for therapeutic and industrial applications. • High-throughput OMIC is the most proficient approach for novel enzyme discovery. • Comprehensive databases and efficient machine learning models are the need of the hour to fast forward de novo enzyme design and discovery.
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Affiliation(s)
- Eswar Rao Tatta
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Tejaswini Hills, Periya (PO.), Kasaragod, Kerala, 671320, India
| | - Madangchanok Imchen
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Tejaswini Hills, Periya (PO.), Kasaragod, Kerala, 671320, India
| | - Jamseel Moopantakath
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Tejaswini Hills, Periya (PO.), Kasaragod, Kerala, 671320, India
| | - Ranjith Kumavath
- Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Tejaswini Hills, Periya (PO.), Kasaragod, Kerala, 671320, India.
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20
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Dhayalan A, Velramar B, Govindasamy B, Ramalingam KR, Dilipkumar A, Pachiappan P. Isolation of a bacterial strain from the gut of the fish, Systomus sarana, identification of the isolated strain, optimized production of its protease, the enzyme purification, and partial structural characterization. JOURNAL OF GENETIC ENGINEERING AND BIOTECHNOLOGY 2022; 20:24. [PMID: 35142906 PMCID: PMC8831710 DOI: 10.1186/s43141-022-00299-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 01/07/2022] [Indexed: 01/12/2023]
Abstract
BACKGROUND The present study focuses on the isolation of Bacillus thuringiensis bacterium from the gut of fresh water fish, Systomus sarana, the innovative optimization of culture parameters to produce maximum protease enzyme, by the isolated bacterium, and the elucidation of peptide profile of the protease. And the experimental data and results were authenticated through the response surface method (RSM) and Box-Behnken design (BBD) model. RESULTS During the RSM optimization, the interaction of the highest concentrations (%) of 2.2 maltose, 2.2 beef extract, and 7.0 pH, at 37 °C incubation, yielded a maximum protease enzyme of 245 U/ml by the fish gut-isolated, B. thuringiensis. The spectral analysis of the obtained enzyme revealed the presence of major functional groups at the range of 610-3852 cm-1 viz., alkynes (-C≡C-H: C-H stretch), misc (P-H phosphine sharp), α, β-unsaturated aldehydes, and through PAGE analysis, its molecular weight was determined as 27 kDa. The enzyme's MALDI-TOF/MS analysis revealed the presence of 15 peptides from which the R.YHTVCDPR.L peptide has been found to be a major one. CONCLUSIONS The fish gut-isolated bacterium, B. thuringiensis, SS4 exhibited the potential for high protease production under the innovatively optimized culture conditions, and the obtained result provides scope for applications in food and pharmaceutical industries.
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Affiliation(s)
- Arul Dhayalan
- Department of Biotechnology, School of Biosciences, Periyar University, Salem, 636011, Tamil Nadu, India.,ICAR- National Dairy Research Institute, SRS, Adugodi, Bengaluru, 560030, Karnataka, India
| | - Balasubramanian Velramar
- Department of Biotechnology, School of Biosciences, Periyar University, Salem, 636011, Tamil Nadu, India.,Amity Institute of Biotechnology, Amity University, Raipur, 493225, Chhattisgarh, India
| | - Balasubramani Govindasamy
- Department of Biotechnology, School of Biosciences, Periyar University, Salem, 636011, Tamil Nadu, India.,ICAR- Central Institute of Brackishwater Aquaculture, Chennai, 600028, Tamil Nadu, India
| | - Karthik Raja Ramalingam
- Department of Biotechnology, School of Biosciences, Periyar University, Salem, 636011, Tamil Nadu, India.,Department of Microbiology, Alagappa University, Karaikudi, 630003, Tamil Nadu, India
| | - Aiswarya Dilipkumar
- Department of Biotechnology, School of Biosciences, Periyar University, Salem, 636011, Tamil Nadu, India.,1/145, New Mariyaman Kovil Street, Bominayakanpatti post, Pagalpatti, Salem, 636304, Tamil Nadu, India
| | - Perumal Pachiappan
- Department of Biotechnology, School of Biosciences, Periyar University, Salem, 636011, Tamil Nadu, India. .,Department of Marine Science, School of Marine Sciences, Bharathidasan University, Tiruchirappalli, 620024, Tamil Nadu, India.
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21
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Asaturova AM, Bugaeva LN, Homyak AI, Slobodyanyuk GA, Kashutina EV, Yasyuk LV, Sidorov NM, Nadykta VD, Garkovenko AV. Bacillusvelezensis Strains for Protecting Cucumber Plants from Root-Knot Nematode Meloidogyne incognita in a Greenhouse. PLANTS (BASEL, SWITZERLAND) 2022; 11:275. [PMID: 35161255 PMCID: PMC8838184 DOI: 10.3390/plants11030275] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 01/14/2022] [Accepted: 01/17/2022] [Indexed: 06/14/2023]
Abstract
Meloidogyne incognita Kofoid et White is one of the most dangerous root-knot nematodes in greenhouses. In this study, we evaluated two Bacillus strains (Bacillus velezensis BZR 86 and Bacillus velezensis BZR 277) as promising microbiological agents for protecting cucumber plants from the root-knot nematode M. incognita Kof. The morphological and cultural characteristics and enzymatic activity of the strains have been studied and the optimal conditions for its cultivation have been developed. We have shown the nematicidal activity of these strains against M. incognita. Experiments with the cucumber variety Courage were conducted under greenhouse conditions in 2016-2018. We determined the effect of plant damage with M. incognita to plants on the biometric parameters of underground and aboveground parts of cucumber plants, as well as on the gall formation index and yield. It was found that the treatment of plants with Bacillus strains contributed to an increase in the height of cucumber plants by 7.4-43.1%, an increase in leaf area by 2.7-17.8%, and an increase in root mass by 3.2-16.1% compared with the control plants without treatment. The application of these strains was proved to contribute to an increase in yield by 4.6-45.8% compared to control. Our experiments suggest that the treatment of cucumber plants with two Bacillus strains improved plant health and crop productivity in the greenhouse. B. velezensis BZR 86 and B. velezensis BZR 277 may form the basis for bionematicides to protect cucumber plants from the root-knot nematode M. incognita.
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Affiliation(s)
- Anzhela M. Asaturova
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.M.A.); (N.M.S.); (V.D.N.)
| | - Ludmila N. Bugaeva
- Lazarevskaya Experimental Plant Protection Station, the Affiliated Branch of the Federal Research Centre of Biological Plant Protection, l. 200, Sochi Highway-77, 354200 Sochi, Russia; (L.N.B.); (G.A.S.); (E.V.K.); (L.V.Y.)
| | - Anna I. Homyak
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.M.A.); (N.M.S.); (V.D.N.)
| | - Galina A. Slobodyanyuk
- Lazarevskaya Experimental Plant Protection Station, the Affiliated Branch of the Federal Research Centre of Biological Plant Protection, l. 200, Sochi Highway-77, 354200 Sochi, Russia; (L.N.B.); (G.A.S.); (E.V.K.); (L.V.Y.)
| | - Evgeninya V. Kashutina
- Lazarevskaya Experimental Plant Protection Station, the Affiliated Branch of the Federal Research Centre of Biological Plant Protection, l. 200, Sochi Highway-77, 354200 Sochi, Russia; (L.N.B.); (G.A.S.); (E.V.K.); (L.V.Y.)
| | - Larisa V. Yasyuk
- Lazarevskaya Experimental Plant Protection Station, the Affiliated Branch of the Federal Research Centre of Biological Plant Protection, l. 200, Sochi Highway-77, 354200 Sochi, Russia; (L.N.B.); (G.A.S.); (E.V.K.); (L.V.Y.)
| | - Nikita M. Sidorov
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.M.A.); (N.M.S.); (V.D.N.)
| | - Vladimir D. Nadykta
- Federal Research Center of Biological Plant Protection, p/o 39, 350039 Krasnodar, Russia; (A.M.A.); (N.M.S.); (V.D.N.)
| | - Alexey V. Garkovenko
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklukho-Maklaya Str. 16/10, 117997 Moscow, Russia;
- Laboratory of Molecular Genetic Research in the Agroindustrial Complex, Department of Biotechnology, Biochemistry and Biophysics, Trubilin Kuban State Agrarian University, Kalinina Str. 13, 350044 Krasnodar, Russia
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22
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Muniasamy R, Balamurugan BS, Rajamahendran D, Rathnasamy S. Switchable deep eutectic solvent driven micellar extractive fermentation of ultrapure fibrin digesting enzyme from Bacillus subtilis. Sci Rep 2022; 12:903. [PMID: 35042908 PMCID: PMC8766521 DOI: 10.1038/s41598-022-04788-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 01/03/2022] [Indexed: 11/09/2022] Open
Abstract
Fibrinolytic protease (FLP) is a therapeutic enzyme used in the treatment of thrombolytic diseases. The present study proposed the concept of pH-driven swappable micellar two-phase extraction for the concurrent production and purification of FLP from Bacillus subtilis at cloud point extraction. Extractive fermentation was carried out with a pH swap mechanism and FLP was extracted to the top phase by surfactant deep eutectic solvents (SDES). Shrimp waste was chosen as a sustainable low-cost substrate that yielded a maximum protease of 185 U/mg. Six SDESs were synthesized with nonionic surfactants as hydrogen bond donors and quaternary ammonium salts as hydrogen bond acceptors and their association was confirmed by H1 NMR. Thermophysical investigation of the synthetic SDES was accomplished as a function of temperature. Response surface methodology for extractive fermentation was performed with the concentration of SADES (35% w/v), Na2SO4 (15% w/v) and pH (6.3) as variables and the enzyme activity (248 IU/mg) as a response. Furthermore, purification using gel filtration chromatography was used to quantify the amount of enzyme obtained in the extraction phase (849 IU/ml). After final purification with an anion exchange column, the maximum purity fold (22.32) with enzyme activity (1172 IU/ml) was achieved. The in-vitro fibrinolytic activity has been confirmed using a fibrin plate assay.
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Affiliation(s)
- Ramya Muniasamy
- Green Separation Engineering Laboratory, School of Chemical and Biotechnology, SASTRA Deemed To Be University, Thanjavur, Tamil Nadu, 613401, India
| | - Bhavani Sowndharya Balamurugan
- Green Separation Engineering Laboratory, School of Chemical and Biotechnology, SASTRA Deemed To Be University, Thanjavur, Tamil Nadu, 613401, India
| | - Devi Rajamahendran
- Green Separation Engineering Laboratory, School of Chemical and Biotechnology, SASTRA Deemed To Be University, Thanjavur, Tamil Nadu, 613401, India
| | - Senthilkumar Rathnasamy
- Green Separation Engineering Laboratory, School of Chemical and Biotechnology, SASTRA Deemed To Be University, Thanjavur, Tamil Nadu, 613401, India.
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23
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Ren J, Deng L, Li C, Dong L, Li Z, Zhao J, Zhang J, Niu D. Safety of composts consisting of hydrothermally treated penicillin fermentation residue: Degradation products, antibiotic resistance genes and bacterial diversity. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 290:118075. [PMID: 34492529 DOI: 10.1016/j.envpol.2021.118075] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 08/19/2021] [Accepted: 08/29/2021] [Indexed: 05/18/2023]
Abstract
Combining hydrothermal treatment and composting is an effective method to dispose of penicillin fermentation residue (PFR), but the safety and related mechanism are still unclear. In this study, penicillin solution was hydrothermally treated to decipher its degradation mechanism, and then hydrothermally treated PFR (HT-PFR) was mixed with bulking agents at ratios of 2:0 (CK), 2:1.5 (T1), and 2:5 (T2) to determine the absolute abundance of antibiotic resistance genes (ARGs) and the succession of bacterial community. Results showed that penicillin was degraded to several new compounds without the initial lactam structure after hydrothermal treatment. During composting, temperature and pH of the composts increased with the raising of HT-PFR proportion, except the pH at days 2. After 52 days of composting, the absolute copies of ARGs (blaTEM, blaCMY2, and blaSFO) and the relative abundance of bacteria related to pathogens were reduced significantly (P < 0.05). Especially, the total amount of ARGs in the samples of CK and T1 were decreased to equal level (around 5 log10 copies/g), which indicated that more ARGs were degraded in the latter by the composting process. In the CK samples, Bacteroidetes and Proteobacteria accounted for ~69.8% of the total bacteria, but they were gradually replaced by Firmicutes with increasing proportions of HT-PFR, which can be caused by the high protein content in PFR. Consisting with bacterial community, more gram-positive bacteria were observed in T1 and T2, and most of them are related to manganese oxidation and chitinolysis. As composting proceeded, bacteria having symbiotic or pathogenic relationships with animals and plants were reduced, but those related to ureolysis and cellulolysis were enriched. Above all, hydrothermal treatment is effective in destroying the lactam structure of penicillin, which makes that most ARGs and pathogenic bacteria are eliminated in the subsequent composting.
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Affiliation(s)
- Jianjun Ren
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou, 213164, China
| | - Liujie Deng
- State Environmental Protection Engineering Center for Harmless Treatment and Resource Utilization of Antibiotic Residues, Yili Chuanning Biotechnology Co., Ltd., Yili, 835007, China
| | - Chunyu Li
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou, 213164, China
| | - Liping Dong
- State Environmental Protection Engineering Center for Harmless Treatment and Resource Utilization of Antibiotic Residues, Yili Chuanning Biotechnology Co., Ltd., Yili, 835007, China
| | - Zhijie Li
- State Environmental Protection Engineering Center for Harmless Treatment and Resource Utilization of Antibiotic Residues, Yili Chuanning Biotechnology Co., Ltd., Yili, 835007, China
| | - Jian Zhao
- Department of Forensic Pathology, Guangzhou Forensic Science Institute and Key Laboratory of Forensic Pathology, Ministry of Public Security, Guangzhou, 510000, China
| | - Jin Zhang
- Hebei Cixin Environmental Technology Co., Ltd., Langfang, 065600, China
| | - Dongze Niu
- National-Local Joint Engineering Research Center for Biomass Refining and High-Quality Utilization, Institute of Urban and Rural Mining, Changzhou University, Changzhou, 213164, China.
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24
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Mahmoud A, Kotb E, Alqosaibi AI, Al-Karmalawy AA, Al-Dhuayan IS, Alabkari H. In vitro and in silico characterization of alkaline serine protease from Bacillus subtilis D9 recovered from Saudi Arabia. Heliyon 2021; 7:e08148. [PMID: 34703922 PMCID: PMC8524146 DOI: 10.1016/j.heliyon.2021.e08148] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 07/27/2021] [Accepted: 10/06/2021] [Indexed: 02/08/2023] Open
Abstract
In this study, we have isolated and characterized proteolytic soil bacteria and their alkaline protease. Based on 16S rRNA sequence analysis, 12 isolates with the highest protease activity were classified as B. subtilis and B. cereus groups. B. subtilis D9 isolate showing the highest protease activity was selected for in vitro and in silico analysis for its ِِAKD9 protease. The enzyme has a molecular mass of 48 kDa, exhibiting optimal activity at 50 °C pH 9.5, and showed high stability till 65 °C and pH 8–11 for 1 h. Fe3+ stimulated, but Zn2+ and Hg2+ strongly inhibited the protease activity. Also, the maximum inhibition with PMSF indicated serine protease-type of AKD9 protease. AkD9 alkaline serine protease gene showed high sequence similarity and close phylogenetic relationship with AprX serine protease of B. subtilis isolates. Functional prediction of AKD9 resulted in the detection of subtilase domain, peptidase_S8 family, and subtilase active sites. Moreover, prediction of physicochemical properties indicated that AKD9 serine protease is hydrophilic, thermostable, and alkali-halo stable. Secondary structure prediction revealed the dominance of the coils enhances AKD9 activity and stability under saline and alkaline conditions. Based on molecular docking, AKD9 showed very promising binding affinities towards casein substrate with expected intrinsic proteolytic activities matching our obtained in vitro results. In conclusion, AKD9 alkaline serine protease seems to be a significant candidate for industrial applications because of its stability, hydrophilicity, enhanced thermostability, and alkali-halo stability.
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Affiliation(s)
- Amal Mahmoud
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia.,Basic & Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia
| | - Essam Kotb
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia.,Basic & Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia
| | - Amany I Alqosaibi
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia.,Basic & Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia
| | - Ahmed A Al-Karmalawy
- Department of Pharmaceutical Medicinal Chemistry, Faculty of Pharmacy, Horus University-Egypt, New Damietta 34518, Egypt
| | - Ibtesam S Al-Dhuayan
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia.,Basic & Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia
| | - Hameedah Alabkari
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia.,Basic & Applied Scientific Research Center, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441, Dammam, Saudi Arabia
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25
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Bhardwaj N, Kumar B, Agrawal K, Verma P. Current perspective on production and applications of microbial cellulases: a review. BIORESOUR BIOPROCESS 2021; 8:95. [PMID: 38650192 PMCID: PMC10992179 DOI: 10.1186/s40643-021-00447-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 09/21/2021] [Indexed: 12/27/2022] Open
Abstract
The potential of cellulolytic enzymes has been widely studied and explored for bioconversion processes and plays a key role in various industrial applications. Cellulase, a key enzyme for cellulose-rich waste feedstock-based biorefinery, has increasing demand in various industries, e.g., paper and pulp, juice clarification, etc. Also, there has been constant progress in developing new strategies to enhance its production, such as the application of waste feedstock as the substrate for the production of individual or enzyme cocktails, process parameters control, and genetic manipulations for enzyme production with enhanced yield, efficiency, and specificity. Further, an insight into immobilization techniques has also been presented for improved reusability of cellulase, a critical factor that controls the cost of the enzyme at an industrial scale. In addition, the review also gives an insight into the status of the significant application of cellulase in the industrial sector, with its techno-economic analysis for future applications. The present review gives a complete overview of current perspectives on the production of microbial cellulases as a promising tool to develop a sustainable and greener concept for industrial applications.
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Affiliation(s)
- Nisha Bhardwaj
- Bioprocess and Bioenergy Laboratory, Department of Microbiology, Central University of Rajasthan, NH-8, Bandarsindri, Kishangarh, Ajmer, Rajasthan, 305817, India
- Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai, Maharashtra, 400019, India
| | - Bikash Kumar
- Bioprocess and Bioenergy Laboratory, Department of Microbiology, Central University of Rajasthan, NH-8, Bandarsindri, Kishangarh, Ajmer, Rajasthan, 305817, India
| | - Komal Agrawal
- Bioprocess and Bioenergy Laboratory, Department of Microbiology, Central University of Rajasthan, NH-8, Bandarsindri, Kishangarh, Ajmer, Rajasthan, 305817, India
| | - Pradeep Verma
- Bioprocess and Bioenergy Laboratory, Department of Microbiology, Central University of Rajasthan, NH-8, Bandarsindri, Kishangarh, Ajmer, Rajasthan, 305817, India.
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26
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Liang T, Xie X, Ma J, Wu L, Xi Y, Zhao H, Li L, Li H, Feng Y, Xue L, Chen M, Chen X, Zhang J, Ding Y, Wu Q. Microbial Communities and Physicochemical Characteristics of Traditional Dajiang and Sufu in North China Revealed by High-Throughput Sequencing of 16S rRNA. Front Microbiol 2021; 12:665243. [PMID: 34526973 PMCID: PMC8435802 DOI: 10.3389/fmicb.2021.665243] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 08/02/2021] [Indexed: 01/14/2023] Open
Abstract
The process of soybean fermentation has been practiced for more than 3,000 years. Although Dajiang and Sufu are two popular fermented soybean products consumed in North China, limited information is available regarding their microbial composition. Hence, the current study sought to investigate, and compare, the physicochemical indicators and microbial communities of traditional Dajiang and Sufu. Results showed that the titratable acidity (TA), and salinity, as well as the lactic acid, and malic acid contents were significantly higher in Sufu samples compared to Dajiang. Furthermore, Sufu samples contain abundant sucrose and fructose, while the acetic acid content was lower in Sufu compared to Dajiang samples. Moreover, the predominant bacterial phyla in Dajiang and Sufu samples were Firmicutes and Proteobacteria, while the major genera comprise Bacillus, Lactobacillus, Tetragenococcus, and Weissella. Moreover, Dajiang samples also contained abundant Pseudomonas, and Brevundimonas spp., while Halomonas, Staphylococcus, Lysinibacillus, Enterobacter, Streptococcus, Acinetobacter, and Halanaerobium spp. were abundant in Sufu samples. At the species level, Bacillus velezensis, Tetragenococcus halophilus, Lactobacillus rennini, Weissella cibaria, Weissella viridescens, Pseudomonas brenneri, and Lactobacillus acidipiscis represented the major species in Dajiang, while Halomonas sp., Staphylococcus equorum, and Halanaerobium praevalens were the predominant species in Sufu. Acetic acid and sucrose were found to be the primary major physicochemical factor influencing the bacterial communities in Dajiang and Sufu, respectively. Furthermore, Bacillus subtilis is strongly correlated with lactic acid levels, L. acidipiscis is positively correlated with acetic acid levels, while Staphylococcus sciuri and S. equorum are strongly, and positively, correlated with malic acid. Following analysis of carbohydrate and amino acid metabolism in all samples, cysteine and methionine metabolism, as well as fatty acid biosynthesis-related genes are upregulated in Dajiang compared to Sufu samples. However, such as the Staphylococcus, W. viridescens, and P. brenneri, as potentially foodborne pathogens, existed in Dajang and Sufu samples. Cumulatively, these results suggested that Dajiang and Sufu have unique bacterial communities that influence their specific characteristics. Hence, the current study provides insights into the microbial community composition in Dajiang and Sufu samples, which may facilitate the isolation of functional bacterial species suitable for Dajiang and Sufu production, thus improving their production efficiency.
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Affiliation(s)
- Tingting Liang
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an, China
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Xinqiang Xie
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Jun Ma
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an, China
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Lei Wu
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an, China
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Yu Xi
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Hui Zhao
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Longyan Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Haixin Li
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Ying Feng
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Liang Xue
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Moutong Chen
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Xuefeng Chen
- School of Food and Biological Engineering, Shaanxi University of Science and Technology, Xi’an, China
| | - Jumei Zhang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Yu Ding
- Department of Food Science & Technology, Institute of Food Safety and Nutrition, Jinan University, Guangzhou, China
| | - Qingping Wu
- Guangdong Provincial Key Laboratory of Microbial Safety and Health, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
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An Updated review on production of food derived bioactive peptides; focus on the psychrotrophic bacterial proteases. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.102051] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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28
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Generation of hydrolysates from rice bran proteins using a combined ultrasonication-Alcalase hydrolysis treatment. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101110] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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29
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Wang Y, Xiang F, Zhang Z, Hou Q, Guo Z. Characterization of bacterial community and flavor differences of different types of Douchi. Food Sci Nutr 2021; 9:3460-3469. [PMID: 34262706 PMCID: PMC8269581 DOI: 10.1002/fsn3.2280] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 03/19/2021] [Accepted: 03/25/2021] [Indexed: 12/11/2022] Open
Abstract
According to the appearance and technology, traditional fermented Douchi can be divided into dried Douchi and wet Douchi. However, there are few reports on the difference of bacterial community structure between them or the influence of bacterial community on product flavor. In this study, high-throughput sequencing technology and electronic nose were used to measure the bacterial diversity and flavor of 40 Douchi samples, and the correlation between them was explored by multivariate statistical means combined with COG database. Results showed that the cumulative average relative abundance of Firmicutes and Proteobacteria in the samples was as high as 95.93%, and the former was the core bacteria phylum. On the whole, the dominant bacteria in Douchi were Bacillus (50.67%), Staphylococcus (14.07%), Enterococcus (2.54%), Proteus (1.61%), Brevibacillus (1.46%), Providencia (1.26%), Weissella (1.24%), and Ureibacillus (1.19%). LEfSe analysis indicated that Bacillus can be used as a biomarker in dried fermented soybeans. Meanwhile, dried samples contained more intensive aromatic substances, but were significantly lower in W6S (selectivity to hydrogen) and W3S (methane-aliph) compared with the wet samples. Aneurinibacillus and Brevibacillus were helpful to the formation of aromatic flavor in Douchi, but Vagococcus and Corynebacterium were the opposite. Gene and microbial phenotypic prediction showed that microorganisms in dried Douchi use protein more efficiently, while in wet Douchi, microbial energy metabolism was more vigorous. The pathogenic potential of microorganisms in dried samples was higher than that in wet. This study can sound the alarm for improving the safety of home-brewed Douchi and provide guidance for the subsequent screening of strains that enhance the flavor of fermented soybeans.
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Affiliation(s)
- Yurong Wang
- Hubei Provincial Engineering and Technology Research Center for Food IngredientsHubei University of Arts and ScienceXiangyangChina
| | - Fanshu Xiang
- Hubei Provincial Engineering and Technology Research Center for Food IngredientsHubei University of Arts and ScienceXiangyangChina
| | - Zhendong Zhang
- Hubei Provincial Engineering and Technology Research Center for Food IngredientsHubei University of Arts and ScienceXiangyangChina
| | - Qiangchuan Hou
- Hubei Provincial Engineering and Technology Research Center for Food IngredientsHubei University of Arts and ScienceXiangyangChina
| | - Zhuang Guo
- Hubei Provincial Engineering and Technology Research Center for Food IngredientsHubei University of Arts and ScienceXiangyangChina
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30
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Evaluation of temperature, pH and nutrient conditions in bacterial growth and extracellular hydrolytic activities of two Alicyclobacillus spp. strains. Arch Microbiol 2021; 203:4557-4570. [PMID: 34159433 DOI: 10.1007/s00203-021-02332-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 04/08/2021] [Accepted: 04/11/2021] [Indexed: 12/16/2022]
Abstract
Extremophile bacteria have developed the metabolic machinery for living in extreme temperatures, pH, and high-salt content. Two novel bacterium strains Alicyclobacillus sp. PA1 and Alicyclobacillus sp. PA2, were isolated from crater lake El Chichon in Chiapas, Mexico. Phylogenetic tree analysis based on the 16SrRNA gene sequence revealed that the strain Alicyclobacillus sp. PA1 and Alicyclobacillus sp. PA2 were closely related to Alicyclobacillus species (98% identity and 94.73% identity, respectively). Both strains were Gram variable, and colonies were circular, smooth and creamy. Electron microscopy showed than Alicyclobacillus sp. PA1 has a daisy-like form and Alicyclobacillus sp. PA2 is a regular rod. Both strains can use diverse carbohydrates and triglycerides as carbon source and they also can use organic and inorganic nitrogen source. But, the two strains can grow without any carbon or nitrogen sources in the culture medium. Temperature, pH and nutrition condition affect bacterial growth. Maximum growth was produced at 65 °C for Alicyclobacillus sp. PA1 (0.732 DO600) at pH 3 and Alicyclobacillus sp. PA2 (0.725 DO600) at pH 5. Inducible extracellular extremozyme activities were determined for β-galactosidase (Alicyclobacillus sp. PA1: 88.07 ± 0.252 U/mg, Alicyclobacillus sp. PA2: 51.57 ± 0.308 U/mg), cellulose (Alicyclobacillus sp. PA1: 141.20 ± 0.585 U/mg, Alicyclobacillus sp. PA2: 51.57 ± 0.308 U/mg), lipase (Alicyclobacillus sp. PA1: 138.25 ± 0.600 U/mg, Alicyclobacillus sp. PA2: 175.75 ± 1.387 U/mg), xylanase (Alicyclobacillus sp. PA1: 174.72 ± 1.746 U/mg, Alicyclobacillus sp. PA2: 172.69 ± 0.855U/mg), and protease (Alicyclobacillus sp. PA1: 15.12 ± 0.121 U/mg, Alicyclobacillus sp. PA2: 15.33 ± 0.284 U/mg). These results provide new insights on extreme enzymatic production on Alicyclobacillus species.
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Cheng D, Liu Y, Ngo HH, Guo W, Chang SW, Nguyen DD, Zhang S, Luo G, Bui XT. Sustainable enzymatic technologies in waste animal fat and protein management. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 284:112040. [PMID: 33571854 DOI: 10.1016/j.jenvman.2021.112040] [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: 11/10/2020] [Revised: 01/14/2021] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
Waste animal fats and proteins (WAFP) are rich in various animal by-products from food industries. On one hand, increasing production of huge amounts of WAFP brings a great challenge to their appropriate disposal, and raises severe risks to environment and life health. On the other hand, the high fat and protein contents in these animal wastes are valuable resources which can be reutilized in an eco-friendly and renewable way. Sustainable enzymatic technologies are promising methods for WAFP management. This review discussed the application of various enzymes in the conversion of WSFP to value-added biodiesel and bioactivate hydrolysates. New biotechnologies to discover novel enzymes with robust properties were proposed as well. This paper also presented the bio-utilization strategy of animal fat and protein wastes as alternative nutrient media for microorganism growth activities to yield important industrial enzymes cost-effectively.
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Affiliation(s)
- Dongle Cheng
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS, 2007, Australia
| | - Yi Liu
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200438, China
| | - Huu Hao Ngo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS, 2007, Australia.
| | - Wenshan Guo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NWS, 2007, Australia; NTT Institute of Hi-Technology, Nguyen Tat Thanh University, Ho Chi Minh City, Viet Nam
| | - Soon Woong Chang
- Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea
| | - Dinh Duc Nguyen
- Department of Environmental Energy Engineering, Kyonggi University, 442-760, Republic of Korea; Institution of Research and Development, Duy Tan University, Da Nang, Viet Nam
| | - Shicheng Zhang
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200438, China
| | - Gang Luo
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200438, China
| | - Xuan Thanh Bui
- Key Laboratory of Advanced Waste Treatment Technology, Ho Chi Minh City University of Technology (HCMUT), Vietnam National University Ho Chi Minh (VNU-HCM), Ho Chi Minh City, 700000, Viet Nam
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Mustefa Beyan S, Venkatesa Prabhu S, Mumecha TK, Gemeda MT. Production of Alkaline Proteases using Aspergillus sp. Isolated from Injera: RSM-GA Based Process Optimization and Enzyme Kinetics Aspect. Curr Microbiol 2021; 78:1823-1834. [PMID: 33779778 DOI: 10.1007/s00284-021-02446-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 03/10/2021] [Indexed: 10/21/2022]
Abstract
Alkaline proteases are well known to be significant industrial enzymes. This study focused on isolating the fungus producing proteases from, a typical Ethiopian food, Injera. Further, the process optimization for protease production using response surface methodology (RSM) and the characterization of the acquired protease were investigated. The 18S rDNA gene sequence homology of the fungus isolate revealed that it was Aspergillus sp. Further, it was deposited in NCBI GenBank with accession number MK4262821. Using the isolate, owing to maximize the protease production, the independent process parameters, temperature, pH, and sucrose concentration were optimized using RSM followed by a genetic algorithm (GA). Based on the statistical approach by RSM-GA optimization, maximum enzyme activity (166.4221 U/ml) was found at 30.5 °C, pH 8.24, and 0.316% sucrose concentration. Also, the crude cocktail of enzymes acquired from optimal condition was partially purified using ammonium which showed that the increased activity by 1.96-fold. Considerably, the partially purified enzyme exhibited stable performance during the temperature range 30-60 °C, pH range 7-10, and NaCl concentration of 0.5-2 mM. Also, the antioxidant activity, degree hydrolysis for the protein, Michaelis-Menten (M-M) kinetic parameters, and activation energy were determined for the obtained enzyme cocktail. It showed that the M-M kinetic parameters, Km (5.54 mg/ml), and Vmax (24.44 mg/ml min) values were observed. Using Arrhenius law, the value of activation energy for the enzyme cocktail was determined as 32.42 kJ/mol.
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Affiliation(s)
- Surafel Mustefa Beyan
- School of Chemical Engineering, Jimma University, Jimma Institute of Technology, 378, Jimma, Ethiopia.
| | - S Venkatesa Prabhu
- College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
| | - Tsegazeab K Mumecha
- Department of Chemical Engineering, Debre Berhan University, Debre Berhan, Ethiopia
| | - Mesfin T Gemeda
- College of Biological and Chemical Engineering, Addis Ababa Science and Technology University, Addis Ababa, Ethiopia
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Shafique T, Shafique J, Zahid S, Kazi M, Alnemer O, Ahmad A. Screening, selection and development of Bacillus subtilis apr-IBL04 for hyper production of macromolecule alkaline protease. Saudi J Biol Sci 2021; 28:1494-1501. [PMID: 33613077 PMCID: PMC7878699 DOI: 10.1016/j.sjbs.2020.11.079] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 11/24/2020] [Accepted: 11/26/2020] [Indexed: 11/24/2022] Open
Abstract
Bacillus subtilis microbe is commonly found in soil and produces proteases on nitrogen and carbon-containing sources and increases the fertility rate by degrading nitrogenous organic materials. The present study was aimed to develop hyper producing mutant strain of B. subtilis for the production of proteases, to improve the process variables by the response surface methodology (RSM) under central composite design (CCD) and the production of protease by the particular mutant strain in a liquid state fermentation media. The mutation of the strain was carried out using ethidium bromide. Pure B. subtilis strain was collected and screened for hyper-production of protease. The production of protease by mutant B. subtilis strain was optimized by varying temperature, inoculum size, pH and incubation time under liquid state fermentation. The CCD model were found to be reliable with r2 of 0.999. The maximum enzyme activity of B. subtilis IBL-04 mutant with 3 mL/100 mL inoculum size, 72 h fermentation time, pH 8, and 45 °C temperature was developed with enzyme activity 631.09 U/mL, indicates 1–7-fold increase in enzyme activity than the parent strain having 82.32 U/mL activity. These characteristics render its potential use in industries for pharmaceutical and dairy formulation.
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Affiliation(s)
- Tahira Shafique
- IBL4-Department of Biochemistry, University of Agriculture Faisalabad, Pakistan
| | - Javeria Shafique
- PBL-Department of Bioinformatics and Biotechnology, Govt. College University, Faisalabad, Pakistan
| | - Sheikh Zahid
- Division of Biochemistry, Faculty of Basic Sciences, SKUAST Jammu, J&K 180009, India
| | - Mohsin Kazi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Saudi Arabia
| | - Osamah Alnemer
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Saudi Arabia
| | - Ajaz Ahmad
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Saudi Arabia
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Debnath R, Mistry P, Roy P, Roy B, Saha T. Partial purification and characterization of a thermophilic and alkali-stable laccase of Phoma herbarum isolate KU4 with dye-decolorization efficiency. Prep Biochem Biotechnol 2021; 51:901-918. [PMID: 33586595 DOI: 10.1080/10826068.2021.1875235] [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] [Indexed: 12/24/2022]
Abstract
Production of an extracellular thermophilic and alkali stable laccase from Phoma herbarum isolate KU4 was reported for the first time, both in submerged fermentation (SmF, highest 1590 U/mL) and solid state fermentation (SSF, highest 2014.21 U/mL) using agro-industrial residues. The laccase was partially purified to 7.93 fold with the apparent molecular weight of 298 kDa. The enzyme had pH optimum at 5.0 and temperature optimum at 50 °C, with maximum stability at pH 8.0. It showed activity towards various phenolic and non-phenolic compounds. The kinetic parameters, Km, Vmax and Kcat of the laccase for DMP were 0.216 mM, 270.27 U/mg and 506.69 s-1, respectively. Laccase activity was inhibited by various metal ions and conventional inhibitors, however, it was slightly increased by Zn2+. The laccase showed good decolorization efficiency towards four industrial dyes, namely, methyl violet (75.66%), methyl green (65%), indigo carmine (58%) and neutral red (42%) within 24 h. FTIR analysis of the decolorized products confirmed the degradation of the dyes. The decolorization efficiency of the enzyme suggests that the partially purified laccase could be used to decolorize synthetic dyes present in industrial effluents and for waste water treatments. The thermophilic and alkali stable laccase may also have wider potential industrial applications.
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Affiliation(s)
- Rinku Debnath
- Department of Molecular Biology and Biotechnology, Faculty of Science, University of Kalyani, Kalyani, India
| | - Prasenjit Mistry
- Department of Chemistry, Faculty of Science, University of Kalyani, Kalyani, India
| | - Priyabrata Roy
- Department of Molecular Biology and Biotechnology, Faculty of Science, University of Kalyani, Kalyani, India
| | - Brindaban Roy
- Department of Chemistry, Faculty of Science, University of Kalyani, Kalyani, India
| | - Tanima Saha
- Department of Molecular Biology and Biotechnology, Faculty of Science, University of Kalyani, Kalyani, India
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Chauhan JV, Mathukiya RP, Singh SP, Gohel SD. Two steps purification, biochemical characterization, thermodynamics and structure elucidation of thermostable alkaline serine protease from Nocardiopsis alba strain OM-5. Int J Biol Macromol 2020; 169:39-50. [PMID: 33316342 DOI: 10.1016/j.ijbiomac.2020.12.061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 11/26/2020] [Accepted: 12/07/2020] [Indexed: 10/22/2022]
Abstract
The Nocardiopsis alba strain OM-5 showed maximum protease production in submerged culture. The OM-5 protease was purified by hydrophobic interaction chromatography. The purified protease of 68 kDa showed maximum activity (3312 ± 1.64 U/mL) at 70 °C and was quite stable at 80 °C up to 4 M NaCl (w/v) at pH 9. The purified protease showed significant activity and stability in different cations, denaturing agents, metal ions, and osmolytes. The thermodynamic parameters including deactivation rate constant (Kd) and half lives (t1/2) at 50-80 °C were in the range of 2.50 × 10-3 to 5.50 × 10-3 and 277.25-111.25 min respectively at 0-4 M NaCl. The structural stability of the OM-5 protease under various harsh conditions was elucidated by circular dichroism (CD) spectroscopy followed by K2D3 analysis revealed that the native structure of OM-5 protease was stable even in sodium dodecyl sulfate and Tween 20 indicated by increased α-helices content assisted with decreased β-sheets content.
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Affiliation(s)
- Jagruti V Chauhan
- UGC-CAS Department of Biosciences, Saurashtra University, Rajkot 360005, Gujarat, India
| | - Riddhi P Mathukiya
- UGC-CAS Department of Biosciences, Saurashtra University, Rajkot 360005, Gujarat, India
| | - Satya P Singh
- UGC-CAS Department of Biosciences, Saurashtra University, Rajkot 360005, Gujarat, India
| | - Sangeeta D Gohel
- UGC-CAS Department of Biosciences, Saurashtra University, Rajkot 360005, Gujarat, India.
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Liu L, Chen X, Hao L, Zhang G, Jin Z, Li C, Yang Y, Rao J, Chen B. Traditional fermented soybean products: processing, flavor formation, nutritional and biological activities. Crit Rev Food Sci Nutr 2020; 62:1971-1989. [PMID: 33226273 DOI: 10.1080/10408398.2020.1848792] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Traditional fermented soybean food has emerged as an important part of people's dietary structure because of the unique flavors and improved health benefit. During fermentation, the nutrients in soybean undergo a series of biochemical reactions catalyzed naturally by microorganism secreted enzymes. Thereafter, many functional and bioactive substances such as bioactive peptides, unsaturated fatty acids, free soy isoflavones, vitamins and minerals are produced, making fermented soy products more advantageous in nutrition and health. This review comprehensively discusses the historical evolution, distribution, traditional fermentation processing, main sources and characteristics of fermented strains, flavor components, nutritional properties, and biological activities of four traditional fermented soybean foods including douchi, sufu, dajiang, and soy sauce. In the end, we introduce four major challenges encountered by traditional fermented soybean foods including high salt content, formation of biogenic amine, the presence of pathogenic microorganisms and mycotoxins, and quality inconsistency. We conclude that the establishment of scientific quality standard and innovated fermentation processing is the potential solutions to combat the issues and improve the safety of traditional fermented soybean products.
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Affiliation(s)
- Libo Liu
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China
- Department of Plant Sciences, North Dakota State University, Fargo, North Dakota, USA
| | - Xiaoqian Chen
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China
| | - Linlin Hao
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China
| | - Guofang Zhang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China
| | - Zhao Jin
- Department of Plant Sciences, North Dakota State University, Fargo, North Dakota, USA
| | - Chun Li
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China
- Department of Plant Sciences, North Dakota State University, Fargo, North Dakota, USA
| | - Yuzhuo Yang
- Heilongjiang Green Food Research Institute, Harbin, China
| | - Jiajia Rao
- Department of Plant Sciences, North Dakota State University, Fargo, North Dakota, USA
| | - Bingcan Chen
- Department of Plant Sciences, North Dakota State University, Fargo, North Dakota, USA
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Expression, purification, and molecular characterization of a full-length thermostable alkaline protease gene from Bacillus subtilis DMA-09. Biologia (Bratisl) 2020. [DOI: 10.2478/s11756-020-00608-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Gauvry E, Mathot AG, Couvert O, Leguérinel I, Coroller L. Effects of temperature, pH and water activity on the growth and the sporulation abilities of Bacillus subtilis BSB1. Int J Food Microbiol 2020; 337:108915. [PMID: 33152569 DOI: 10.1016/j.ijfoodmicro.2020.108915] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 07/15/2020] [Accepted: 10/04/2020] [Indexed: 11/27/2022]
Abstract
Spore-forming bacteria are implicated in cases of food spoilage or food poisoning. In their sporulated form, they are resistant to physical and chemical treatments applied in the food industry and can persist throughout the food chain. The sporulation leads to an increase in the concentration of resistant forms in final products or food processing equipment. In order to identify sporulation environments in the food industry, it is necessary to be able to predict bacterial sporulation according to environmental factors. As sporulation occurs after bacterial growth, a kinetic model of growth-sporulation was used to describe the evolution of vegetative cells and spores through time. The effects of temperature, pH and water activity on the growth and the sporulation abilities of Bacillus subtilis BSB1 were modelled. The values of the growth boundaries were used as inputs to predict these effects. The good description of the sporulation kinetics by growth parameters suggests that the impact of the studied environmental factors is the same on both physiological process. Suboptimal conditions for growth delay the appearance of the first spores, and spores appear more synchronously in suboptimal conditions for growth. The developed model was also applicable to describe the growth and sporulation curves in changing temperature and pH conditions over time.
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Affiliation(s)
- Emilie Gauvry
- Univ Brest, Laboratoire Universitaire de Biodiversité et Écologie Microbienne, UMT ALTER'IX, F-29000 Quimper, France
| | - Anne-Gabrielle Mathot
- Univ Brest, Laboratoire Universitaire de Biodiversité et Écologie Microbienne, UMT ALTER'IX, F-29000 Quimper, France
| | - Olivier Couvert
- Univ Brest, Laboratoire Universitaire de Biodiversité et Écologie Microbienne, UMT ALTER'IX, F-29000 Quimper, France
| | - Ivan Leguérinel
- Univ Brest, Laboratoire Universitaire de Biodiversité et Écologie Microbienne, UMT ALTER'IX, F-29000 Quimper, France
| | - Louis Coroller
- Univ Brest, Laboratoire Universitaire de Biodiversité et Écologie Microbienne, UMT ALTER'IX, F-29000 Quimper, France.
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Owusu-Kwarteng J, Parkouda C, Adewumi GA, Ouoba LII, Jespersen L. Technologically relevant Bacillus species and microbial safety of West African traditional alkaline fermented seed condiments. Crit Rev Food Sci Nutr 2020; 62:871-888. [PMID: 33030021 DOI: 10.1080/10408398.2020.1830026] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Fermented food condiments serve as a major source of nutrients to many homes in West Africa, especially among the rural poor who use these condiments as a cheap source of protein substitute for milk and other animal protein sources. Traditional fermented West African condiments are produced by spontaneous fermentation of legumes and protein-rich seeds of both cultivated and wild plant species. These fermented condiments are culturally accepted and widely produced in the West African sub-region, and rely on indigenous microbiota responsible for taste, texture, aroma development and the overall unique product characteristics. Detailed understanding of fermentation microbiota and their unique technological and functional properties are fundamental in developing products with enhanced quality and safety, as well as development of specific locally adapted starter cultures. Technologically relevant Bacillus spp., mainly Bacillus subtilis, are the predominant fermentative bacteria responsible for the natural fermentation of condiments across West Africa. Other species of Bacillus including B. amyloliquefaciens, B. licheniformis, B. pumilus, B. megaterium, B. sphaericus, B. cereus, B. badius and B. fusiformis are also frequently involved in the fermentation process. These bacterial species are responsible for flavor development, bio-conversion of complex food molecules, and production of antimicrobial compounds that impact shelf-life and safety, and in some instances, may confer host-beneficial health effects beyond basic nutrition. First, this review provides currently available information on the technologically relevant Bacillus species isolated from fermented food condiments in nine (9) West African countries. In addition, perspectives on harnessing the potentials of the technologically beneficial bacterial strains in fermented condiments in West Africa for enhanced food safety, quality and overall food security is presented.
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Affiliation(s)
- James Owusu-Kwarteng
- Department of Food Science and Technology, University of Energy and Natural Resources, Sunyani, Ghana
| | - Charles Parkouda
- CNRST/IRSAT/DTA, Centre National de la Recherche Scientifique et Technologique, Ouagadougou, Burkina Faso
| | | | - Labia Irène Ivette Ouoba
- Department of Health and Human Sciences, Microbiology Research Unit, London Metropolitan University, London, UK
| | - Lene Jespersen
- Department of Food Science, Food Microbiology, University of Copenhagen, Copenhagen, Denmark
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Characterisation of pectin and optimization of pectinase enzyme from novel Streptomyces fumigatiscleroticus VIT-SP4 for drug delivery and concrete crack-healing applications: An eco-friendly approach. Saudi J Biol Sci 2020; 27:3529-3540. [PMID: 33304164 PMCID: PMC7715466 DOI: 10.1016/j.sjbs.2020.07.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 07/19/2020] [Accepted: 07/20/2020] [Indexed: 02/06/2023] Open
Abstract
Pectinases are enzymes which are widely distributed in microbes that are present in pectin enriched sites. The agro-industrial residues can be utilized in the industrial scale for low-cost and efficient pectinase production in an eco-friendly approach. This study employs low-cost substrates (i.e. culinary fruit peels) for maximum pectinase production from novel Streptomyces fumigatiscleroticus VIT-SP4. The extraction and characterization of pectin from different fruit peels were investigated and pectinase activity was analyzed. The orange pectin gave maximum pectinase activity of about 45.93 (U/mL). Further, statistical optimization of process parameters was studied by using Taguchi method showed optimum values of pH-6, temperature −35 °C, orange pectin% − 2.5, incubation time- 48 h and RPM- 200 rpm and pectinase activity was found to be 98.65 (U/mL). The response surface methodology (RSM) was used for the optimization of media components which revealed that starch −1.17%, yeast extract-2%, and orange pectin% − 0.75% produces maximum pectinase of about 170.05 (U/mL). The drug-delivery study showed drug release was not observed at initial pH 3 after 4 h. The immediate drug release was noted at pH 6 caused due to disintegration of pectin by the pectinase activity. The self-healing of cracks by spray culture technique was investigated. The crack healing was observed up to 0.50 mm wide after 12 days. This confirms the ability of actinomycete spores to survive and they react to form calcite complex directly helps in crack healing process. This low-cost microbial pectinase can be used in drug delivery and concrete crack-healing applications sectors in future.
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Protease—A Versatile and Ecofriendly Biocatalyst with Multi-Industrial Applications: An Updated Review. Catal Letters 2020. [DOI: 10.1007/s10562-020-03316-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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42
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Statistical optimisation of protease production using a freshwater bacterium Chryseobacterium cucumeris SARJS-2 for multiple industrial applications. 3 Biotech 2020; 10:279. [PMID: 32537379 DOI: 10.1007/s13205-020-02259-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 05/14/2020] [Indexed: 12/28/2022] Open
Abstract
Feathers, rich in keratin, are usually the unused by-products of poultry industries. In addition, the cast-off X-ray films serve as secondary sources of silver, and the traditional method of silver extraction from this source is costly and not eco-friendly. Therefore, the current study focuses on protease production using a freshwater bacterium Chryseobacterium cucumeris SARJS-2, aiming to convert these wastes into useful products. The protease production was optimized by one-factor-at-a-time (OFAT), followed by Plackett Burman design (PBD) and response surface methodology (RSM). The protease production got enhanced by more than two folds after the statistical optimisation. Upon partial purification, the enzyme activity increased by approximately three folds. The protease was active in the range of temperatures from 25 to 75 °C, but the optimum temperature was recorded as 35 °C. The protease exhibited detergent compatibility and organic solvent stability. The detergent compatibility suggests the protease could be a detergent additive. It was also found that the presence of Fe+2 enhanced protease activity. The protease was tested for stain removal, feather degradation and silver recovery applications. It was found that the protease could efficiently remove stains of blood and tomato sauce. In addition, the protease was found to be a successful candidate for feather degradation, thereby feather-hydrolysate production which has prominent roles as nature-friendly fertilizer and animal feed ingredient. The protease also degraded gelatin from the X-ray films to release the silver-halides for silver recovery. The results recommend that the SARJS-2 protease is a potential candidate for use in eco-friendly applications in various industrial sectors.
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43
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Thu NTA, Khue NTM, Huy ND, Tien NQD, Loc NH. Characterizations and Fibrinolytic Activity of Serine Protease from Bacillus subtilis C10. Curr Pharm Biotechnol 2020; 21:110-116. [PMID: 31577203 DOI: 10.2174/1389201020666191002145415] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 08/26/2019] [Accepted: 09/11/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND Fibrinolytic enzymes, such as Nattokinases from Bacillus species are known to degrade the fibrin blood clots. They belong to serine protease group having commercial applications, such as therapeutic agents and functional food formulation. OBJECTIVE The present study reports some characteristics and fibrinolytic activity of serine protease from B. subtilis C10 strain that was isolated from shrimp shell. METHODS Extracellular enzyme from B. subtilis C10 culture was harvested and partially purified by ammonium sulphate precipitation. Fibrinolytic activity of the enzyme was determined by zymography and measured by spectrophotometry with fibrinogen and thrombin used as substrates. The optimal temperature and pH for fibrinolytic activity were studied in the range of 31-43ºC and 5-10, respectively. The thermal and pH stability of enzyme was studied by incubating enzyme for 30 min in the same range of temperature and pH as above. The effect of some metal ions and reagents on fibrinolytic activity of enzyme was evaluated by concentrations of 5 mM and 5%, respectively. RESULTS Zymogram analysis indicated the presence of four fibrinolytic enzymes with molecular weights of approximately 69, 67, 39 and 36 kDa. The optimal temperature and pH for enzyme activity were 37°C and 9, respectively. The thermal and pH stability ranged from 35-39°C and 8-10, respectively. Fibrinolytic activity reached a maximum value of about 400 U/mg protein after 16 h of C10 strain culture. Enzyme has been drastically inhibited by PMSF and SDS, and partially inhibited by EDTA, while Triton X-100 has significantly increased enzyme activity. Effects of ions such as Mg2+, Ca2+ and Mn2+ on enzyme were negligible, except Cu2+ and Zn2+ have strongly decreased its activity. CONCLUSION Results from the present study suggested that enzyme obtained from B. subtilis C10 could be serine protease that has a high fibrinolytic activity up to about 400 U/mg protein at the most appropriate temperature and pH of 37ºC and 9. This activity can be improved up to 142% by incubating enzyme with 5% Triton X-100 for 30 min.
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Affiliation(s)
- Nguyen T A Thu
- Institute of Bioactive Compounds and Department of Biology, University of Sciences, Hue University, Hue, Vietnam.,University of Medicine and Pharmacy, Hue University, Hue, Vietnam; 3Institute of Biotechnology, Hue University, Vietnam
| | - Nguyen T M Khue
- Institute of Bioactive Compounds and Department of Biology, University of Sciences, Hue University, Hue, Vietnam
| | - Nguyen D Huy
- Institute of Biotechnology, Hue University, Vietnam
| | - Nguyen Q D Tien
- Institute of Bioactive Compounds and Department of Biology, University of Sciences, Hue University, Hue, Vietnam
| | - Nguyen H Loc
- Institute of Bioactive Compounds and Department of Biology, University of Sciences, Hue University, Hue, Vietnam
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Hammami A, Bayoudh A, Hadrich B, Abdelhedi O, Jridi M, Nasri M. Response‐surface methodology for the production and the purification of a new H
2
O
2
‐tolerant alkaline protease from
Bacillus invictae
AH1 strain. Biotechnol Prog 2020; 36:e2965. [DOI: 10.1002/btpr.2965] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 01/03/2020] [Accepted: 01/09/2020] [Indexed: 01/22/2023]
Affiliation(s)
- Amal Hammami
- Laboratory of Enzyme Engineering and MicrobiologyEngineering National School of Sfax (ENIS), University of Sfax Sfax Tunisia
| | - Ahmed Bayoudh
- Laboratory of Enzyme Engineering and MicrobiologyEngineering National School of Sfax (ENIS), University of Sfax Sfax Tunisia
| | - Bilel Hadrich
- Unité de Biotechnologie des Algues, Biological Engineering Department, National School of Engineers of SfaxUniversity of Sfax Sfax Tunisia
| | - Ola Abdelhedi
- Laboratory of Enzyme Engineering and MicrobiologyEngineering National School of Sfax (ENIS), University of Sfax Sfax Tunisia
| | - Mourad Jridi
- Laboratory of Enzyme Engineering and MicrobiologyEngineering National School of Sfax (ENIS), University of Sfax Sfax Tunisia
- Higher Institute of Biotechnology of BejaUniversity of Jendouba Beja Tunisia
| | - Moncef Nasri
- Laboratory of Enzyme Engineering and MicrobiologyEngineering National School of Sfax (ENIS), University of Sfax Sfax Tunisia
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Elyasi Far B, Yari Khosroushahi A, Dilmaghani A. In Silico Study of Alkaline Serine Protease and Production Optimization in Bacillus sp. Khoz1 Closed Bacillus safensis Isolated from Honey. Int J Pept Res Ther 2020. [DOI: 10.1007/s10989-020-10016-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Salwan R, Sharma V, Kasana RC, Gulati A. Bioprospecting Psychrotrophic Bacteria for Serine-Type Proteases from the Cold Areas of Western Himalayas. Curr Microbiol 2020; 77:795-806. [PMID: 31919673 DOI: 10.1007/s00284-020-01876-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 01/03/2020] [Indexed: 11/28/2022]
Abstract
The aim of present study was to analyze the prevalence of protease diversity among psychrotrophic bacteria in Lahaul and Spiti of the Western Himalayas. A total of 459 bacteria were screened and protease activity was observed in 150 isolates at 5 °C. Furthermore, 55 isolates showed protease activity up to pH 10 at 5 °C. Based on the hydrolytic zone, 22 isolates were selected for protease quantification. The protease activity varied from 58-377 U mL-1 at 10 °C, 49-396 U mL-1 at 28 °C and 31-407 U mL-1 at 37 °C. Similarly, protease activity ranged from 36-353 U mL-1 at pH 7, 40-306 U mL-1 at pH 9 and 33-304 U mL-1 at pH 10. The isolates were identified based on 16S rRNA gene sequencing and showed phylogenetic relationship to Arthrobacter belonging to the class Actinobacteria, Bacillus, Exiguobacterium, Paenibacillus, and Planomicrobium to Bacilli, and Pseudomonas, Serratia, and Stenotrophomonas to Gammaproteobacteria. Zymogram analysis revealed variations in protease isoforms ranging from 20 to 250 kDa which were strongly inhibited in the presence of phenylmethylsulfonyl fluoride, thus indicated serine-type nature. The extensive number of serine proteases among these bacteria was confirmed by annotating genomes of the reported genera for prevalence of protease isoforms. The properties of proteases including low-temperature activity with alkaline stability and detergent compatibility suggested their suitability as bio-additives in laundry.
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Affiliation(s)
- Richa Salwan
- Academy of Scientific and Innovative Research, New Delhi, India. .,CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176061, India. .,College of Horticulture and Forestry (Dr. YSP-University of Horticulture and Forestry), Neri, Hamirpur, Himachal Pradesh, 177 001, India.
| | - Vivek Sharma
- CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176061, India.,University Centre for Research and Development, Chandigarh University, Gharuan, Mohali (PB.), India
| | - Ramesh Chand Kasana
- Academy of Scientific and Innovative Research, New Delhi, India.,CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176061, India.,Central Arid Zone Research Institute, Jodhpur, 342 003, India
| | - Arvind Gulati
- Academy of Scientific and Innovative Research, New Delhi, India.,CSIR-Institute of Himalayan Bioresource Technology, Palampur, 176061, India
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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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Oztas Gulmus E, Gormez A. Characterization and biotechnological application of protease from thermophilic Thermomonas haemolytica. Arch Microbiol 2019; 202:153-159. [PMID: 31541265 DOI: 10.1007/s00203-019-01728-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/04/2019] [Accepted: 09/11/2019] [Indexed: 01/25/2023]
Abstract
In this study, it was aimed to determine the ability to produce protease enzyme of Thermomonas haemolytica isolated from geothermal Nenehatun hot spring in Turkey and utilization of this enzyme in the detergent industry to remove protein stains. The protease-producing strains were screened from hot springs, and a potential strain was identified as T. haemolytica according to morphological, physiological and biochemical characteristics and sequence of 16S rRNA gene. Maximum protease activity was observed at 55 °C and pH 9.0 at 72 h of incubation. Activity was very stable between 50 and 65 °C and pH 8.0-10.0, respectively. The enzyme activity was significantly inhibited by PMSF and partly inhibited by EDTA, EGTA, SDS, and urea. Some divalent metal ions such as Ca2+, Mg2+, and Mn2+ increased the enzyme activity, while Zn2+ and Cu2+ decreased. Michaelis-Menten constant (Km) and maximum velocity (Vmax) values were calculated by Lineweaver-Burk plot as 125 EU/ml and 1262 mg/ml, respectively. The biochemical characterization of the protease obtained from T. haemolytica was performed and applied on the blood and grass-stained fabrics with detergent to evaluate the stain removal performance of the enzyme. It was observed that the application of detergent with enzyme was more effective than the detergent without enzyme to clean up the stained fabrics. This is the first report of characterization of the protease of T. haemolytica. According to results obtained from this study, this new strain is a promising candidate for industrial applications in production of detergent.
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Affiliation(s)
- Ebru Oztas Gulmus
- Department of Molecular Biology and Genetics, Faculty of Science, Erzurum Technical University, Erzurum, Turkey
| | - Arzu Gormez
- Department of Molecular Biology and Genetics, Faculty of Science, Erzurum Technical University, Erzurum, Turkey.
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Iqbalsyah TM, Malahayati, Atikah, Febriani. Purification and partial characterization of a thermo-halostable protease produced by Geobacillus sp. strain PLS A isolated from undersea fumaroles. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2019. [DOI: 10.1080/16583655.2019.1650489] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Teuku M. Iqbalsyah
- Faculty of Mathematics and Natural Sciences, Chemistry Department, Biomolecules Application Research Group, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Malahayati
- Faculty of Mathematics and Natural Sciences, Chemistry Department, Biomolecules Application Research Group, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Atikah
- Faculty of Mathematics and Natural Sciences, Chemistry Department, Biomolecules Application Research Group, Universitas Syiah Kuala, Banda Aceh, Indonesia
| | - Febriani
- Faculty of Mathematics and Natural Sciences, Chemistry Department, Biomolecules Application Research Group, Universitas Syiah Kuala, Banda Aceh, Indonesia
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Razzaq A, Shamsi S, Ali A, Ali Q, Sajjad M, Malik A, Ashraf M. Microbial Proteases Applications. Front Bioeng Biotechnol 2019; 7:110. [PMID: 31263696 PMCID: PMC6584820 DOI: 10.3389/fbioe.2019.00110] [Citation(s) in RCA: 181] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 05/01/2019] [Indexed: 11/13/2022] Open
Abstract
The use of chemicals around the globe in different industries has increased tremendously, affecting the health of people. The modern world intends to replace these noxious chemicals with environmental friendly products for the betterment of life on the planet. Establishing enzymatic processes in spite of chemical processes has been a prime objective of scientists. Various enzymes, specifically microbial proteases, are the most essentially used in different corporate sectors, such as textile, detergent, leather, feed, waste, and others. Proteases with respect to physiological and commercial roles hold a pivotal position. As they are performing synthetic and degradative functions, proteases are found ubiquitously, such as in plants, animals, and microbes. Among different producers of proteases, Bacillus sp. are mostly commercially exploited microbes for proteases. Proteases are successfully considered as an alternative to chemicals and an eco-friendly indicator for nature or the surroundings. The evolutionary relationship among acidic, neutral, and alkaline proteases has been analyzed based on their protein sequences, but there remains a lack of information that regulates the diversity in their specificity. Researchers are looking for microbial proteases as they can tolerate harsh conditions, ways to prevent autoproteolytic activity, stability in optimum pH, and substrate specificity. The current review focuses on the comparison among different proteases and the current problems faced during production and application at the industrial level. Deciphering these issues would enable us to promote microbial proteases economically and commercially around the world.
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Affiliation(s)
- Abdul Razzaq
- State Key Laboratory of Cotton Biology, Key Laboratory of Biological and Genetic Breeding of Cotton, The Ministry of Agriculture, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, China
| | - Sadia Shamsi
- School of Medicine, Medical Sciences and Nutrition, The Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Arfan Ali
- 1-FB, Genetics, Four Brothers Group, Lahore, Pakistan
| | - Qurban Ali
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Muhammad Sajjad
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Arif Malik
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Muhammad Ashraf
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
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