1
|
Abedi E, Kaveh S, Mohammad Bagher Hashemi S. Structure-based modification of a-amylase by conventional and emerging technologies: Comparative study on the secondary structure, activity, thermal stability and amylolysis efficiency. Food Chem 2024; 437:137903. [PMID: 37931423 DOI: 10.1016/j.foodchem.2023.137903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 10/22/2023] [Accepted: 10/27/2023] [Indexed: 11/08/2023]
Abstract
α-Amylase is an endo-enzyme that catalyzes the hydrolysis of starch into shorter oligosaccharides. α-Amylase plays a crucial role in various industries. Manipulated α-amylases are of particular interest due to their remarkable amylolysis efficiency and thermostability for large-scale biotechnological processes. The retained catalytic activity of enzymes is decreased according to extreme pH, temperature, pressure, and chemical reagents. Broad industrial applications of α-amylases need special properties such as stability against temperature, pH, and chelators, and also attain reusability, desirable enzymatic activity, efficiency, and selectivity. Considering the biotechnological importance of α-amylase, its high stability is the most critical challenge for its economic viability. Therefore, improving its functionality and stability recently gained much interest. To achieve this purpose, various emerging technologies in combination with conventional methods on α-Amylases with different sources have been conducted. The present review is an attempt to summarize the effect of various conventional methods and emerging technologies employed to date on α-amylase secondary structure, thermal stability, and performance.
Collapse
Affiliation(s)
- Elahe Abedi
- Department of Food Science and Technology, Faculty of Agriculture, Fasa University, Fasa, Iran
| | - Shima Kaveh
- Department of Food Science and Technology, Faculty of Agriculture, Fasa University, Fasa, Iran.
| | | |
Collapse
|
2
|
Microbial amylolytic enzymes in foods: Technological importance of the Bacillus genus. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.102054] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
3
|
Kherouf M, Habbeche A, Benamia F, Saoudi B, Kerouaz B, Ladjama A. Statistical optimization of a novel extracellular alkaline and thermostable amylase production from thermophilic Actinomadura keratinilytica sp. Cpt29 and its potential application in detergent industry. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.102068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
4
|
Bhatt K, Lal S, R S, Joshi B. Bioconversion of agriculture wastes to produce α-amylase from Bacillus velezensis KB 2216: Purification and characterization. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101703] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
5
|
Abd Elhameed E, Sayed ARM, Radwan TEE, Hassan G. Biochemical and Molecular Characterization of Five Bacillus Isolates Displaying Remarkable Carboxymethyl Cellulase Activities. Curr Microbiol 2020; 77:3076-3084. [PMID: 32710168 DOI: 10.1007/s00284-020-02135-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Accepted: 07/15/2020] [Indexed: 12/11/2022]
Abstract
Cellulases have many useful applications in industry and biotechnology. So, identification of new bacterial strains expressing cellulases with better properties is desired. Five soil bacterial strains screened for high carboxymethyl cellulase (CMCase) activities were characterized and identified by 16S rRNA analysis as Bacillus amyloliquefaciens (FAY088), B. velezensis (FAY0103), B. tequilensis (FAY0117), B. subtilis (FAY0136), and B. subtilis (FAY0182). Their CMCase activities were 1.49, 1.26, 1.21, 1.21, and 1.24 U/ml, respectively. The maximum CMCase production was attained by growth at 35 °C, pH 6, and 180 rpm for 5 days. Residual activities of CMCases from FAY088 and FAY0117 were 88% or more after growth at 40 °C, which is same as FAY0182 CMCase at 40 and 45 °C. Additionally, FAY0182 retained 73% residual activity at 50 °C. FAY088 and FAY0182 retained more than 85% at pH 7 and 8. Conversely, residual activities from FAY0103 and FAY0136 declined a lot by increasing growth temperature beyond 40 °C and pH beyond 7. The maximum CMCase stability in all isolates was observed at pH 7, 3-h incubation, and 40 °C except for FAY0103 CMCase showed optimum temperature at 30 °C. More than 70% CMCase stability was retained in case of FAY088 at 50 °C, FAY0117 at 50-70 °C, and FAY0136 at 50-60 °C. FAY088 CMCase seemed to be the lest sensitive to temperature variation as it displayed residual activities 67, 72, 78, 84, 77, 74, and 72% at pH 3, 4, 5, 6, 8, 9, and 10, respectively. Finally, the five CMCase-producing isolates are recommended further enzyme applications in biotechnology and industry.
Collapse
Affiliation(s)
- Esraa Abd Elhameed
- Chemistry Department, Faculty of Science, Fayoum University, Fayoum, 63514, Egypt
| | - Alaa R M Sayed
- Chemistry Department, Faculty of Science, Fayoum University, Fayoum, 63514, Egypt. .,College of Pharmacy, University of Florida, Orlando, FL, 32827, USA.
| | - Tharwat E E Radwan
- Botany Department, Faculty of Science, Fayoum University, Fayoum, 63514, Egypt
| | - Gamal Hassan
- Genetics Department, Faculty of Agriculture, Fayoum University, Fayoum, 63514, Egypt
| |
Collapse
|
6
|
Ojha SK, Singh PK, Mishra S, Pattnaik R, Dixit S, Verma SK. Response surface methodology based optimization and scale-up production of amylase from a novel bacterial strain, Bacillus aryabhattai KIIT BE-1. ACTA ACUST UNITED AC 2020; 27:e00506. [PMID: 32742945 PMCID: PMC7388185 DOI: 10.1016/j.btre.2020.e00506] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 06/16/2020] [Accepted: 07/13/2020] [Indexed: 12/31/2022]
Abstract
A novel strain KIIT BE-1 isolated from a specialized environment, screened through starch iodine test from a set of eighty-five biodigestate isolates, produced amylase maximally when cultured for 48 h at 37 °C. The molecular and biochemical characterization confirmed it as a strain of Bacillus aryabhattai. It exhibited optimal amylase activity (3.20 U/ml) at 36 h post incubation with a media combination of starch and yeast extract for C-N source respectively. Statistical optimisation by response surface modeling showed R2 values of 0.9645 for biomass and 0.9831 for amylase activity, suggesting the significance of the model. The optimised medium (10.25 % starch, 5.0 % peptone, 5.18 % yeast extract, pH 7.3) enhanced the enzyme activity to 4.16 U/ml (1.39-fold) from 3.20 U/ml of un-optimised medium. Further, the biomass yield and the enzymatic activity in optimized medium and process conditions increased by 1.14 and 1.21 folds subjected to a 5 l scaled-up operation in a lab-scale bioreactor.
Collapse
Affiliation(s)
- Sanjay Kumar Ojha
- School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) Deemed-to-be-University, Bhubaneswar, 751 024, India.,Pandorum Technologies Pvt. Ltd., Bangalore Bioinnovation Centre, Helix Biotech Park, Electronic City Phase 1, Bengaluru, 560 100, India
| | - Puneet Kumar Singh
- School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) Deemed-to-be-University, Bhubaneswar, 751 024, India
| | - Snehasish Mishra
- School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) Deemed-to-be-University, Bhubaneswar, 751 024, India
| | - Ritesh Pattnaik
- School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) Deemed-to-be-University, Bhubaneswar, 751 024, India
| | - Shubha Dixit
- School of Pharmacy, Lloyd Institute of Management and Technology, PlotNo.11, Knowledge Park II, Greater Noida, 201310, India
| | - Suresh K Verma
- School of Biotechnology, Kalinga Institute of Industrial Technology (KIIT) Deemed-to-be-University, Bhubaneswar, 751 024, India
| |
Collapse
|
7
|
Calcium and sodium ions synergistically enhance the thermostability of a maltooligosaccharide-forming amylase from Bacillus stearothermophilus STB04. Food Chem 2019; 283:170-176. [DOI: 10.1016/j.foodchem.2019.01.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 11/27/2018] [Accepted: 01/03/2019] [Indexed: 01/27/2023]
|
8
|
Trabelsi S, Ben Mabrouk S, Kriaa M, Ameri R, Sahnoun M, Mezghani M, Bejar S. The optimized production, purification, characterization, and application in the bread making industry of three acid-stable alpha-amylases isoforms from a new isolated Bacillus subtilis strain US586. J Food Biochem 2019; 43:e12826. [PMID: 31353531 DOI: 10.1111/jfbc.12826] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 02/17/2019] [Accepted: 02/18/2019] [Indexed: 01/10/2023]
Abstract
A new alpha-amylase-producing strain was assigned as Bacillus subtilis US586. The used statistical methodology indicated that amylase production was enhanced by 5.3 folds. The crude enzyme analysis proved the presence of three amylases isoforms Amy1, Amy2, and Amy3 called Amy586. The purified amylases had molecular masses of 48, 52, and 68 kDa with a total specific activity of 2,133 U/mg. Amy586 generated maltose, maltotriose, and maltopentaose as main final products after starch hydrolysis. It exhibited a large 4-6 optimal pH, a 60°C temperature activity, and a moderate thermostability. Amy586 displayed a high pH stability ranging from 3.5 to 6. The addition of Amy586 to weak wheat flour decreased its P/L ratio from 1.9 to 1.2 and increased its dough baking strength (W) from 138 × 10-4 to 172 × 10-4 J. Amy586 also improved the bread texture parameters by reducing its firmness and boosting the cohesion and elasticity values. PRACTICAL APPLICATIONS: Bacterial alpha-amylases with novel properties have been the major extent of recent research. In this paper, we managed to demonstrate that the addition of a purified amylolytic extract from the new isolated Bacillus subtilis strain US586 to weak local flour improves dough rheological proprieties and bread quality. Therefore, Amy586 can be considered as a bread making improver.
Collapse
Affiliation(s)
- Sahar Trabelsi
- Laboratory of Microbial Biotechnology and Engineering Enzymes (LMBEE), Centre of Biotechnology of Sfax (CBS), University of Sfax, Sfax, Tunisia
| | - Sameh Ben Mabrouk
- Laboratory of Microbial Biotechnology and Engineering Enzymes (LMBEE), Centre of Biotechnology of Sfax (CBS), University of Sfax, Sfax, Tunisia
| | - Mouna Kriaa
- Laboratory of Microorganisms and Biomolecules, Center of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia
| | - Rihab Ameri
- Laboratory of Microbial Biotechnology and Engineering Enzymes (LMBEE), Centre of Biotechnology of Sfax (CBS), University of Sfax, Sfax, Tunisia
| | - Mouna Sahnoun
- Laboratory of Microbial Biotechnology and Engineering Enzymes (LMBEE), Centre of Biotechnology of Sfax (CBS), University of Sfax, Sfax, Tunisia
| | - Monia Mezghani
- Laboratory of Microbial Biotechnology and Engineering Enzymes (LMBEE), Centre of Biotechnology of Sfax (CBS), University of Sfax, Sfax, Tunisia
| | - Samir Bejar
- Laboratory of Microbial Biotechnology and Engineering Enzymes (LMBEE), Centre of Biotechnology of Sfax (CBS), University of Sfax, Sfax, Tunisia
| |
Collapse
|