1
|
Zhao Z, Xiao Z, Jiang B, Chen J. Tailored chitosan integration in diatomaceous earth particles as a scaffold for fructosyltransferase immobilization in fructo-oligosaccharide production. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2024; 104:6563-6572. [PMID: 38520271 DOI: 10.1002/jsfa.13480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/13/2024] [Accepted: 03/23/2024] [Indexed: 03/25/2024]
Abstract
BACKGROUND Fructo-oligosaccharide (FOS) belongs to the group of short inulin-type fructans and is one of the most important non-digestible bifid-oligosaccharides capable of biotransforming sucrose using fructosyltransferase (FTase). However, there are no immobilized FTase products that can be successfully used industrially. In this study, diatomite was subjected to extrusion, sintering and granulation to form diatomaceous earth particles that were further modified via chitosan aminomethylation for modification. FTase derived from Aspergillus oryzae was successfully immobilized on the modified support via covalent binding. RESULTS The immobilized enzyme activity was 503 IU g-1 at an enzyme concentration of 0.6 mg mL-1, immobilization pH of 7.0 and contact time of 3 h. Additionally, the immobilization yield was 56.91%. Notably, the immobilized enzyme was more stable under acidic conditions. Moreover, the half-life of the immobilized enzyme was 20.80 and 10.96 times as long as that of the free enzyme at 45 and 60 °C, respectively. The results show good reusability, as evidenced by the 84.77% retention of original enzyme activity after eight cycles. Additionally, the column transit time of the substrate was 35.56 min when the immobilized enzyme was applied in a packed-bed reactor. Furthermore, a consistently high FOS production yield of 60.68% was achieved and maintained over the 15-day monitoring period. CONCLUSIONS Our results suggest that immobilized FTase is a viable candidate for continuous FOS production on an industrial scale. © 2024 Society of Chemical Industry.
Collapse
Affiliation(s)
- Zishen Zhao
- School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Ziqun Xiao
- School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Bo Jiang
- School of Food Science and Technology, Jiangnan University, Wuxi, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, China
| | - Jingjing Chen
- School of Food Science and Technology, Jiangnan University, Wuxi, China
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, China
| |
Collapse
|
2
|
Danait-Nabar S, Singhal RS. Immobilization of l-asparaginase on genipin cross-linked chitosan beads shows better acrylamide diminution in cassava chips: Process optimization and characterization. J Food Sci 2024. [PMID: 39098813 DOI: 10.1111/1750-3841.17274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 06/25/2024] [Accepted: 07/11/2024] [Indexed: 08/06/2024]
Abstract
Glutaraldehyde is the conventionally used cross-linker for the activation and cross-linking of support matrices used in enzyme immobilization. However, the toxic nature of glutaraldehyde makes it unsafe for food applications, propelling the need for nontoxic cross-linkers. Genipin reacts with the primary and secondary amines generating a dark-blue colored pigment and is an attractive alternative to glutaraldehyde as a cross-linker for enzyme immobilization. Apart from its excellent cross-linking properties, genipin possesses added advantages over glutaraldehyde such as proven health benefits, biocompatibility, and biodegradability. The present study explores the application of chitosan beads cross-linked with the natural and nontoxic agent, genipin, for immobilizing l-asparaginase, aimed at its subsequent use in mitigating acrylamide formation in food products. The immobilized l-asparaginase exhibited improved functionalities such as stability, reusability, and reduction in acrylamide formation in deep-fried cassava chips. One of the limitations observed during application in the food process was the mechanical fragility of the chitosan beads during speedy stirring. This can be overcome by increasing the concentration and time of contact of the coagulant bath during the formation of chitosan beads. The drying of the enzyme-bound chitosan beads will also lead to shrinkage and prevent breakage during stirring. This study conclusively demonstrated the applicability of immobilizing l-asparaginase on genipin cross-linked chitosan beads in food-related processes.
Collapse
Affiliation(s)
- Saaylee Danait-Nabar
- Food Engineering and Technology Department, Institute of Chemical Technology, Mumbai, India
| | - Rekha S Singhal
- Food Engineering and Technology Department, Institute of Chemical Technology, Mumbai, India
| |
Collapse
|
3
|
Dobryakova NV, Dumina MV, Zhgun AA, Pokrovskaya MV, Aleksandrova SS, Zhdanov DD, Kudryashova EV. L-Asparaginase Conjugates from the Hyperthermophilic Archaea Thermococcus sibiricus with Improved Biocatalytic Properties. Int J Mol Sci 2024; 25:4174. [PMID: 38673759 PMCID: PMC11050321 DOI: 10.3390/ijms25084174] [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: 01/31/2024] [Revised: 04/05/2024] [Accepted: 04/08/2024] [Indexed: 04/28/2024] Open
Abstract
This study investigated the effect of polycationic and uncharged polymers (and oligomers) on the catalytic parameters and thermostability of L-asparaginase from Thermococcus sibiricus (TsA). This enzyme has potential applications in the food industry to decrease the formation of carcinogenic acrylamide during the processing of carbohydrate-containing products. Conjugation with the polyamines polyethylenimine and spermine (PEI and Spm) or polyethylene glycol (PEG) did not significantly affect the secondary structure of the enzyme. PEG contributes to the stabilization of the dimeric form of TsA, as shown by HPLC. Furthermore, neither polyamines nor PEG significantly affected the binding of the L-Asn substrate to TsA. The conjugates showed greater maximum activity at pH 7.5 and 85 °C, 10-50% more than for native TsA. The pH optima for both TsA-PEI and TsA-Spm conjugates were shifted to lower pH ranges from pH 10 (for the native enzyme) to pH 8.0. Additionally, the TsA-Spm conjugate exhibited the highest activity at pH 6.5-9.0 among all the samples. Furthermore, the temperature optimum for activity at pH 7.5 shifted from 90-95 °C to 80-85 °C for the conjugates. The thermal inactivation mechanism of TsA-PEG appeared to change, and no aggregation was observed in contrast to that of the native enzyme. This was visually confirmed and supported by the analysis of the CD spectra, which remained almost unchanged after heating the conjugate solution. These results suggest that TsA-PEG may be a more stable form of TsA, making it a potentially more suitable option for industrial use.
Collapse
Affiliation(s)
- Natalia V. Dobryakova
- Group of Fungal Genetic Engineering, Federal Research Center “Fundamentals of Biotechnology of the Russian Academy of Sciences”, 117312 Moscow, Russia; (N.V.D.); (M.V.D.); (D.D.Z.)
- Chemical Faculty, Lomonosov Moscow State University, Leninskie Gory St. 1, 119991 Moscow, Russia
| | - Maria V. Dumina
- Group of Fungal Genetic Engineering, Federal Research Center “Fundamentals of Biotechnology of the Russian Academy of Sciences”, 117312 Moscow, Russia; (N.V.D.); (M.V.D.); (D.D.Z.)
| | - Alexander A. Zhgun
- Group of Fungal Genetic Engineering, Federal Research Center “Fundamentals of Biotechnology of the Russian Academy of Sciences”, 117312 Moscow, Russia; (N.V.D.); (M.V.D.); (D.D.Z.)
| | - Marina V. Pokrovskaya
- Laboratory of Medical Biotechnology, Institute of Biomedical Chemistry, 119121 Moscow, Russia
| | | | - Dmitry D. Zhdanov
- Group of Fungal Genetic Engineering, Federal Research Center “Fundamentals of Biotechnology of the Russian Academy of Sciences”, 117312 Moscow, Russia; (N.V.D.); (M.V.D.); (D.D.Z.)
- Laboratory of Medical Biotechnology, Institute of Biomedical Chemistry, 119121 Moscow, Russia
| | - Elena V. Kudryashova
- Group of Fungal Genetic Engineering, Federal Research Center “Fundamentals of Biotechnology of the Russian Academy of Sciences”, 117312 Moscow, Russia; (N.V.D.); (M.V.D.); (D.D.Z.)
- Chemical Faculty, Lomonosov Moscow State University, Leninskie Gory St. 1, 119991 Moscow, Russia
| |
Collapse
|
4
|
Ateş B, Ulu A, Asiltürk M, Noma SAA, Topel SD, Dik G, Özhan O, Bakar B, Yıldız A, Vardı N, Parlakpınar H. Enhancement of enzyme activity by laser-induced energy propulsion of upconverting nanoparticles under near-infrared light: A comprehensive methodology for in vitro and in vivo applications. Int J Biol Macromol 2024; 260:129343. [PMID: 38242401 DOI: 10.1016/j.ijbiomac.2024.129343] [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: 09/21/2023] [Revised: 01/05/2024] [Accepted: 01/07/2024] [Indexed: 01/21/2024]
Abstract
If the appropriate immobilization method and carrier support are not selected, partial decreases in the activity of enzymes may occur after immobilization. Herein, to overcome this challenge, an excitation mechanism that enables energy transfer was proposed. Modified upconverting nanoparticles (UCNPs) were constructed and the important role of near-infrared (NIR) excitation in enhancing the catalytic activity of the enzyme was demonstrated. For this purpose, UCNPs were first synthesized via the hydrothermal method, functionalized with isocyanate groups, and then, PEG-L-ASNase was immobilized via covalent binding. UCNPs with and without PEG-L-ASNase were extensively characterized by different methods. These supports had immobilization yield and activity efficiency of >96 % and 78 %, respectively. Moreover, immobilized enzymes exhibited improved pH, thermal, and storage stability. In addition, they retained >65 % of their initial activity even after 20 catalytic cycles. Biochemical and histological findings did not indicate a trend of toxicity in rats due to UCNPs. Most importantly, PEG-L-ASNase activity was triggered approximately 5- and 2-fold under in vitro and in vivo conditions, respectively. Overall, it is anticipated that this pioneering work will shed new light on the realistic and promising usage of NIR-excited UCNPs for the immobilization of enzymes in expensive and extensive applications.
Collapse
Affiliation(s)
- Burhan Ateş
- Biochemistry and Biomaterials Research Laboratory, Department of Chemistry, Faculty of Arts and Science, İnönü University, 44280 Malatya, Türkiye.
| | - Ahmet Ulu
- Biochemistry and Biomaterials Research Laboratory, Department of Chemistry, Faculty of Arts and Science, İnönü University, 44280 Malatya, Türkiye.
| | - Meltem Asiltürk
- Department of Material Science and Engineering, Faculty of Engineering, Akdeniz University, 07070 Antalya, Türkiye
| | - Samir Abbas Ali Noma
- Biochemistry and Biomaterials Research Laboratory, Department of Chemistry, Faculty of Arts and Science, İnönü University, 44280 Malatya, Türkiye; Department of Chemistry, Faculty of Arts and Science, Bursa Uludag University, Bursa, Türkiye
| | - Seda Demirel Topel
- Department of Electrical and Electronics Engineering, Faculty of Engineering, Antalya Bilim University, 07190 Antalya, Türkiye
| | - Gamze Dik
- Biochemistry and Biomaterials Research Laboratory, Department of Chemistry, Faculty of Arts and Science, İnönü University, 44280 Malatya, Türkiye
| | - Onural Özhan
- Department of Medicinal Pharmacology, Medical Faculty, İnönü University, 44210 Malatya, Türkiye
| | - Büşra Bakar
- Biochemistry and Biomaterials Research Laboratory, Department of Chemistry, Faculty of Arts and Science, İnönü University, 44280 Malatya, Türkiye
| | - Azibe Yıldız
- Department of Histology and Embryology, Medical Faculty, İnönü University, 44210 Malatya, Türkiye
| | - Nigar Vardı
- Department of Histology and Embryology, Medical Faculty, İnönü University, 44210 Malatya, Türkiye
| | - Hakan Parlakpınar
- Department of Medicinal Pharmacology, Medical Faculty, İnönü University, 44210 Malatya, Türkiye
| |
Collapse
|
5
|
Abedi E, Mohammad Bagher Hashemi S, Ghiasi F. Effective mitigation in the amount of acrylamide through enzymatic approaches. Food Res Int 2023; 172:113177. [PMID: 37689930 DOI: 10.1016/j.foodres.2023.113177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 06/18/2023] [Accepted: 06/19/2023] [Indexed: 09/11/2023]
Abstract
Acrylamide (AA), as a food-borne toxicant, is created at some stages of thermal processing in the starchy food through Maillard reaction, fatty food via acrolein route, and proteinous food using free amino acids pathway. Maillard reaction obviously takes place in thermal-based products, being responsible for specific sensory attributes; AA formation, thereby, is unavoidable during the thermal processing. Additionally, AA can naturally occur in soil and water supply. In order to reduce the levels of acrylamide in cooked foods, mitigation techniques can be separated into three different types. Firstly, starting materials low in acrylamide precursors can be used to reduce the acrylamide in the final product. Secondly, process conditions may be modified in order to decrease the amount of acrylamide formation. Thirdly, post-process intervention could be used to reduce acrylamide. Conventional or emerging mitigation techniques might negatively influence the pleasant features of heated foods. The current study summarizes the effect of enzymatic reaction induced by asparaginase, glucose oxidase, acrylamidase, phytase, amylase, and protease to possibly inhibit AA formation or progressively hydrolyze formed AA. Not only enzyme-assisted AA reduction could dramatically maintain bio-active compounds, but also no damaging impact has been reported on the sensorial and rheological properties of the final heated products. The enzyme engineering can be applied to ameliorate enzyme functionality through altering the amino acid sequence like site-specific mutagenesis and directed evolution, chemical modifications by covalent conjugation of L-asparaginase onto soluble/insoluble biocompatible polymers and immobilization. Moreover, it would be possible to improve the enzyme's physical, chemical, and thermal stability, recyclability and prevent enzyme overuse by applying engineered ones. In spite of enzymes' cost-effective and eco-friendly, promoting their large-scale usages for AA reduction in food application and AA bioremediation in wastewater and soil resources.
Collapse
Affiliation(s)
- Elahe Abedi
- Department of Food Science and Technology, Faculty of Agriculture, Fasa University, Fasa, Iran.
| | | | - Fatemeh Ghiasi
- Department of Food Science and Technology, School of Agriculture, Shiraz University, Shiraz, Iran.
| |
Collapse
|
6
|
Talluri VP, Mutaliyeva B, Sharipova A, Ulaganathan V, Lanka SS, Aidarova S, Suigenbayeva A, Tleuova A. L-Asparaginase delivery systems targeted to minimize its side-effects. Adv Colloid Interface Sci 2023; 316:102915. [PMID: 37159987 DOI: 10.1016/j.cis.2023.102915] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 04/25/2023] [Accepted: 04/26/2023] [Indexed: 05/11/2023]
Abstract
L-asparaginase (L-ASP) is one of the key enzymes used in therapeutic applications, particularly to treat Acute Lymphocytic Leukemia (ALL). L-asparagine is a non-essential amino acid, which means that it can be synthesized by the body and is not required to be obtained through the diet. The synthesis of L-asparagine occurs primarily in the liver, but it also takes place in other tissues throughout the body. In contrast, leukemic cells cannot synthesize L-asparagine due the absence of L-asparagine synthetase and should obtain it from circulating sources for protein synthesis and cell division processes to ensure their vital functions. L-ASP catalyzes the deamination process of L-asparagine amino-acid into aspartic acid and ammonia, depriving leukemic cells of asparagine. This leads to decreased protein synthesis and cell division in tumor cells. However, using L-ASP has side effects, such as hypersensitivity or allergic reaction, antigenicity, short half-life, temporary blood clearance, and toxicity. L-ASP immobilization can minimize the side effects of L-ASP by stopping the immune system from attacking non-human enzymes and improving the enzyme's performance. The first strategy includes modification of enzyme structure, such as covalent binding (conjugation), adsorption to the support material and cross-linking of the enzyme. The chemical modification of residues, often nonspecific, changes the enzyme's hydrophobicity and surface charge, lowering the enzyme's activity. Also, the first strategy exposes the enzyme's surface to the environment. This eliminates its performance and does not allow targeted delivery of the enzyme. The second strategy is based on the entrapment of the enzyme inside the protecting structure or encapsulation. This strategy offers the same benefits as the first. Still, it also enables reducing toxicity, prolonging in vivo half-life, enhancing stability and activity, enables a targeted delivery and controlled release of the enzyme. Compared to the first strategy, encapsulation does not modify the chemical structure of the enzyme since L-ASP is only effective against leukemia in its native tetrameric form. This review aims to present state of the art in L-ASP formulations developed for reducing the side effects of L-ASP, focusing on describing improvements in their safety. The primary focus in the field remains to be improving the overall performance of the L-ASP formulations. Almost all encapsulation systems allow reducing immune response due to screening the enzyme from antibodies and prolonging its half-life. However, the enzyme's activity and stability depend on the encapsulation system type. Therefore, the selection of the right encapsulation system is crucial in therapy due to its effect on the performance parameters of the L-ASP. Biodegradable and biocompatible materials, such as chitosan, alginate and liposomes, mainly attract the researcher's interest in enzyme encapsulation. The research trends are also moving towards developing formulations with targeted delivery and increased selectivity.
Collapse
Affiliation(s)
| | | | | | | | - Sri Santhi Lanka
- Gandhi Institute of Technology and Management (GITAM) University, Visakhapatnam 530045, Andhra Pradesh, India
| | - Saule Aidarova
- Kazakh-British Technical University, Almaty 050005, Kazakhstan
| | | | - Aiym Tleuova
- M. Auezov South Kazakhstan University, Shymkent 160012, Kazakhstan.
| |
Collapse
|
7
|
Immobilization of recombinant L-asparaginase from Geobacillus kaustophilus on magnetic MWCNT-nickel composites. Process Biochem 2023. [DOI: 10.1016/j.procbio.2023.01.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
8
|
Monajati M, Tamaddon AM, Abolmaali SS, Yousefi G, Borandeh S, Dinarvand R. Enhanced L-asparaginase stability through immobilization in supramolecular nanogels of PEG-grafted poly HPMA with bis(α-cyclodextrin). Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
9
|
Bordewick S, Berger RG, Ersoy F. Co-Immobilization of RizA Variants with Acetate Kinase for the Production of Bioactive Arginyl Dipeptides. Molecules 2022; 27:molecules27144352. [PMID: 35889224 PMCID: PMC9321006 DOI: 10.3390/molecules27144352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/28/2022] [Accepted: 07/05/2022] [Indexed: 12/02/2022] Open
Abstract
The biocatalytic system comprised of RizA and acetate kinase (AckA) combines the specific synthesis of bioactive arginyl dipeptides with efficient ATP regeneration. Immobilization of this coupled enzyme system was performed and characterized in terms of activity, specificity and reusability of the immobilisates. Co-immobilization of RizA and AckA into a single immobilisate conferred no disadvantage in comparison to immobilization of only RizA, and a small addition of AckA (20:1) was sufficient for ATP regeneration. New variants of RizA were constructed by combining mutations to yield variants with increased biocatalytic activity and specificity. A selection of RizA variants were co-immobilized with AckA and used for the production of the salt-taste enhancers Arg-Ser and Arg-Ala and the antihypertensive Arg-Phe. The best variants yielded final dipeptide concentrations of 11.3 mM Arg-Ser (T81F_A158S) and 11.8 mM Arg-Phe (K83F_S156A), the latter of which represents a five-fold increase in comparison to the wild-type enzyme. T81F_A158S retained more than 50% activity for over 96 h and K83F_S156A for over 72 h. This study provides the first example of the successful co-immobilization of an l-amino acid ligase with an ATP-regenerating enzyme and paves the way towards a bioprocess for the production of bioactive dipeptides.
Collapse
|
10
|
Kashid S, Joshi K, Nene S. Comparison of hydrodynamic characteristics of Tulsion and Siran immobilised beads in a fluidised bed bioreactor. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
11
|
Thermostable Chitosan-L-Asparaginase conjugate from Aspergillus fumigatus is a novel structurally stable composite for abolishing acrylamide formation in French fried potatoes. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113494] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
12
|
Quesada-Valverde M, Artavia G, Granados-Chinchilla F, Cortés-Herrera C. Acrylamide in foods: from regulation and registered levels to chromatographic analysis, nutritional relevance, exposure, mitigation approaches, and health effects. TOXIN REV 2022. [DOI: 10.1080/15569543.2021.2018611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mónica Quesada-Valverde
- Centro Nacional de Ciencia y Tecnología de Alimentos (CITA), Universidad de Costa Rica, San José, Costa Rica
| | - Graciela Artavia
- Centro Nacional de Ciencia y Tecnología de Alimentos (CITA), Universidad de Costa Rica, San José, Costa Rica
| | - Fabio Granados-Chinchilla
- Centro Nacional de Ciencia y Tecnología de Alimentos (CITA), Universidad de Costa Rica, San José, Costa Rica
| | - Carolina Cortés-Herrera
- Centro Nacional de Ciencia y Tecnología de Alimentos (CITA), Universidad de Costa Rica, San José, Costa Rica
| |
Collapse
|
13
|
Alam S, Nagpal T, Singhal R, Kumar Khare S. Immobilization of L-asparaginase on magnetic nanoparticles: Kinetics and functional characterization and applications. BIORESOURCE TECHNOLOGY 2021; 339:125599. [PMID: 34303095 DOI: 10.1016/j.biortech.2021.125599] [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: 05/30/2021] [Revised: 07/13/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
L-asparaginase shows great potential as a food enzyme to reduce acrylamide formation in fried and baked products. But for food applications, enzymes must be stable at high temperatures and have higher catalytic efficiency. These desirable characteristics are conferred by the immobilization of enzymes on a suitable matrix. The present study aimed to immobilize the L-asparaginase enzyme on magnetic nanoparticles to reduce acrylamide content in the food system. Immobilized preparations were characterized using SEM, TEM, FTIR, UV-spectrometry, and XRD diffraction analyses. These nanoparticles enhanced the thermal stability of the enzyme up to four-fold at 70 °C compared to the free enzyme. Kinetic parameters exhibited an increase in Vmax, Km, and catalytic efficiency by ~ 38% than the free counterpart. The immobilized preparations were reusable for up to five cycles. Moreover, their application in the pre-treatment coupled with blanching of potato chips led to a significant reduction (greater than 95%) of acrylamide formation.
Collapse
Affiliation(s)
- Shahenvaz Alam
- Enzyme and Microbial Biochemistry Laboratory, Chemistry Department, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
| | - Tanya Nagpal
- Enzyme and Microbial Biochemistry Laboratory, Chemistry Department, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India
| | - Rekha Singhal
- Food and Engineering Department, Institute of Chemical Technology, Matunga, Mumbai, India
| | - Sunil Kumar Khare
- Enzyme and Microbial Biochemistry Laboratory, Chemistry Department, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, India.
| |
Collapse
|
14
|
Jia R, Wan X, Geng X, Xue D, Xie Z, Chen C. Microbial L-asparaginase for Application in Acrylamide Mitigation from Food: Current Research Status and Future Perspectives. Microorganisms 2021; 9:microorganisms9081659. [PMID: 34442737 PMCID: PMC8400838 DOI: 10.3390/microorganisms9081659] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 07/30/2021] [Accepted: 08/02/2021] [Indexed: 12/31/2022] Open
Abstract
L-asparaginase (E.C.3.5.1.1) hydrolyzes L-asparagine to L-aspartic acid and ammonia, which has been widely applied in the pharmaceutical and food industries. Microbes have advantages for L-asparaginase production, and there are several commercially available forms of L-asparaginase, all of which are derived from microbes. Generally, L-asparaginase has an optimum pH range of 5.0-9.0 and an optimum temperature of between 30 and 60 °C. However, the optimum temperature of L-asparaginase from hyperthermophilic archaea is considerable higher (between 85 and 100 °C). The native properties of the enzymes can be enhanced by using immobilization techniques. The stability and recyclability of immobilized enzymes makes them more suitable for food applications. This current work describes the classification, catalytic mechanism, production, purification, and immobilization of microbial L-asparaginase, focusing on its application as an effective reducer of acrylamide in fried potato products, bakery products, and coffee. This highlights the prospects of cost-effective L-asparaginase, thermostable L-asparaginase, and immobilized L-asparaginase as good candidates for food application in the future.
Collapse
Affiliation(s)
- Ruiying Jia
- Institute of Nursing and Health, College of Nursing and Health, Henan University, Kaifeng 475004, China; (R.J.); (X.W.)
| | - Xiao Wan
- Institute of Nursing and Health, College of Nursing and Health, Henan University, Kaifeng 475004, China; (R.J.); (X.W.)
| | - Xu Geng
- School of Basic Medicine, Henan University, Jinming Avenue, Kaifeng 475004, China;
- Correspondence: (X.G.); (C.C.)
| | - Deming Xue
- School of Life Science, Henan Normal University, Xinxiang 453007, China;
| | - Zhenxing Xie
- School of Basic Medicine, Henan University, Jinming Avenue, Kaifeng 475004, China;
| | - Chaoran Chen
- Institute of Nursing and Health, College of Nursing and Health, Henan University, Kaifeng 475004, China; (R.J.); (X.W.)
- Correspondence: (X.G.); (C.C.)
| |
Collapse
|