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Chen Z, Chen J, Ni D, Xu W, Zhang W, Mu W. Microbial dextran-hydrolyzing enzyme: Properties, structural features, and versatile applications. Food Chem 2024; 437:137951. [PMID: 37951078 DOI: 10.1016/j.foodchem.2023.137951] [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: 06/09/2023] [Revised: 10/28/2023] [Accepted: 11/06/2023] [Indexed: 11/13/2023]
Abstract
Dextran, an α-glucan mainly composed of (α1 → 6) linkages, has been widely applied in the food, cosmetic, and medicine industries. Dextranase can hydrolyze dextran to synthesize oligodextrans, which show prominent properties and promising applications in the food industry. Dextranases are widely distributed in bacteria, yeasts, and fungus, and classified into glycoside hydrolase (GH) 13, 15, 31, 49, and 66 families according to their sequence similarity, structural features, and reaction types. Dextranase, as a dextran-hydrolyzing enzyme, displays great application potential in the sugar-making, oral health care, medicine, and biotechnology industries. Here we mainly focused on presenting the enzymatic properties, structural features, and versatile (potential) applications of dextranase. To date, seven crystal structures of dextranases from GH 13, 15, 31, 49, and 66 families have been successfully solved. However, their molecular mechanisms for hydrolyzing dextran, especially on the size determinants of the hydrolysates, remain largely unknown. Additionally, the classification, microbial distribution, and immobilization technology of dextranase were also discussed in detail. This review discussed dextranase from different aspects with the ambition to present how they constitute the groundwork for promising future developments.
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Affiliation(s)
- Ziwei Chen
- School of Food and Biological Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang 212013, Jiangsu, China
| | - Jiajun Chen
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Dawei Ni
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wei Xu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, China.
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China
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2
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Misra V, Mall AK, Solomon S, Ansari MI. Post-harvest biology and recent advances of storage technologies in sugarcane. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2022; 33:e00705. [PMID: 35145888 PMCID: PMC8819023 DOI: 10.1016/j.btre.2022.e00705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/17/2022] [Accepted: 01/24/2022] [Indexed: 06/14/2023]
Abstract
Sugarcane deteriorates at a quick rate, just like other perishable crops. The quick loss of sucrose content in sugarcane from the time it is harvested has a significant impact on sugar recovery. This problem of post-harvest sucrose losses in sugarcane is a serious concern in cane-producing countries, as it not only leads to low sugar recovery in mills, but also to poor sugar refining. Unreasonable delays in cane transportation from the fields to the mill are frequently linked to a number of problems related to primary or secondary sucrose losses, all of which contribute to a significant reduction in cane weight and sugar recovery. In sugar mills, the processing of damaged or stale canes also presents a number of challenges, including increased viscosity due to dextran generation, formation of acetic acid, and dextrans due to Leuconostoc spp. invasion, and so on. The combination of all of these variables results in low sugar quality, resulting in significant losses for sugar mills. The primary and secondary losses caused by post-harvest sucrose degradation in sugarcane are enlisted. The employment of physico-chemical technologies in farmers' fields and sugar mills to control and minimize these losses has also been demonstrated.
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Affiliation(s)
- Varucha Misra
- ICAR-Indian Institute of Sugarcane Research, Lucknow, U.P., 226002 India
| | - AK Mall
- ICAR-Indian Institute of Sugarcane Research, Lucknow, U.P., 226002 India
| | - S Solomon
- Chandra Shekhar Azad University of Agriculture and Technology, Kanpur U.P., 208002, India
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3
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Characterisation of biomass degrading xylanolytic enzymes of Penicillium chrysogenum produced using sugarcane bagasse. Process Biochem 2022. [DOI: 10.1016/j.procbio.2021.11.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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4
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An enzymatic membrane reactor for oligodextran production: Effects of enzyme immobilization strategies on dextranase activity. Carbohydr Polym 2021; 271:118430. [PMID: 34364570 DOI: 10.1016/j.carbpol.2021.118430] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 07/07/2021] [Accepted: 07/08/2021] [Indexed: 01/07/2023]
Abstract
An enzymatic membrane reactor (EMR) with immobilized dextranase provides an excellent opportunity for tailoring the molecular weight (Mw) of oligodextran to significantly improve product quality. However, a highly efficient EMR for oligodextran production is still lacking and the effect of enzyme immobilization strategy on dextranase hydrolysis behavior has not been studied yet. In this work, a functional layer of polydopamine (PDA) or nanoparticles made of tannic acid (TA) and hydrolysable 3-amino-propyltriethoxysilane (APTES) was first coated on commercial membranes. Then cross-linked dextranase or non-cross-linked dextranase was loaded onto the modified membranes using incubation mode or fouling-induced mode. The fouling-induced mode was a promising enzyme immobilization strategy on the membrane surface due to its higher enzyme loading and activity. Moreover, unlike the non-cross-linked dextranase that exhibited a normal endo-hydrolysis pattern, we surprisingly found that the cross-linked dextranase loaded on the PDA modified surface exerted an exo-hydrolysis pattern, possibly due to mass transfer limitations. Such alteration of hydrolysis pattern has rarely been reported before. Based on the hydrolysis behavior of the immobilized dextranase in different EMRs, we propose potential applications for the oligodextran products. This study presents a unique perspective on the relation between the enzyme immobilization process and the immobilized enzyme hydrolysis behavior, and thus opens up a variety of possibilities for the design of a high-performance EMR.
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5
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Nano-organic supports for enzyme immobilization: Scopes and perspectives. Colloids Surf B Biointerfaces 2021; 204:111774. [PMID: 33932893 DOI: 10.1016/j.colsurfb.2021.111774] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 04/04/2021] [Accepted: 04/14/2021] [Indexed: 12/16/2022]
Abstract
A variety of organic nanomaterials and organic polymers are used for enzyme immobilization to increase enzymes stability and reusability. In this study, the effects of the immobilization of enzymes on organic and organic-inorganic hybrid nano-supports are compared. Immobilization of enzymes on organic support nanomaterials was reported to significantly improve thermal, pH and storage stability, acting also as a protection against metal ions inhibitory effects. In particular, the effects of enzyme immobilization on reusability, physical, kinetic and thermodynamic parameters were considered. Due to their biocompatibility with low health risks, organic support nanomaterials represent a good choice for the immobilization of enzymes. Organic nanomaterials, and especially organic-inorganic hybrids, can significantly improve the kinetic and thermodynamic parameters of immobilized enzymes compared to macroscopic supports. Moreover, organic nanomaterials are more environment friendly for medical applications, such as prodrug carriers and biosensors. Overall, organic hybrid nanomaterials are receiving increasing attention as novel nano-supports for enzyme immobilization and will be used extensively.
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Watson A, Simmermaker C, Aung E, Do S, Hackbusch S, Franz AH. NMR analysis and molecular dynamics conformation of α-1,6-linear and α-1,3-branched isomaltose oligomers as mimetics of α-1,6-linked dextran. Carbohydr Res 2021; 503:108296. [PMID: 33813322 DOI: 10.1016/j.carres.2021.108296] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 03/21/2021] [Accepted: 03/22/2021] [Indexed: 01/01/2023]
Abstract
The conformational preferences of several α-1,6-linear and α-1,3-branched isomalto-oligosaccharides were investigated by NMR and MD-simulations. Right-handed helical structure contributed to the solution geometry in isomaltotriose and isomaltotetraose with one nearly complete helix turn and stabilizing intramolecular hydrogen bonds in the latter by MD-simulation. Decreased helix contribution was observed in α-1,3-glucopyranosyl- and α-1,3-isomaltosyl-branched saccharide chains. Especially the latter modification was predicted to cause a more compact structure consistent with literature rheology measurements as well as with published dextranase-resistant α-1,3-branched oligosaccharides. The findings presented here are significant because they shed further light on the conformational preference of isomalto-oligosaccharides and provide possible help for the design of dextran-based drug delivery systems or for the targeted degradation of capsular polysaccharides by dextranases in multi-drug resistant bacteria.
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Affiliation(s)
- Amelia Watson
- Department of Chemistry, University of the Pacific, 3601 Pacific Avenue, Stockton, CA, 95211, USA
| | - Cate Simmermaker
- Department of Chemistry, University of the Pacific, 3601 Pacific Avenue, Stockton, CA, 95211, USA
| | - Ei Aung
- Department of Chemistry, University of the Pacific, 3601 Pacific Avenue, Stockton, CA, 95211, USA
| | - Stephen Do
- Department of Chemistry, University of the Pacific, 3601 Pacific Avenue, Stockton, CA, 95211, USA
| | - Sven Hackbusch
- Department of Chemistry, University of the Pacific, 3601 Pacific Avenue, Stockton, CA, 95211, USA
| | - Andreas H Franz
- Department of Chemistry, University of the Pacific, 3601 Pacific Avenue, Stockton, CA, 95211, USA.
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Liu X, Deng T, Liu X, Lai X, Feng Y, Lyu M, Wang S. Isomalto-Oligosaccharides Produced by Endodextranase Shewanellasp. GZ-7 From Sugarcane Plants. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20953286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Oligosaccharides have important alimental and medical applications. Dextranase has been used to produce isomalto-oligosaccharides (IMOs). In this study, we isolated dextranase-producing bacteria from sugarcane-cultivated soil. Identification of the isolate based on its phenotypical, physiological, and biochemical characteristics, as well as 16S ribosomal deoxyribonucleic acid gene sequencing yielded Shewanella sp. strain GZ-7. The molecular weight of the dextranase produced by this strain was 100-135 kDa. The optimum temperature and pH for dextranase production were 40 °C and 7.5, respectively. The enzyme was found to be stable at the pH range of 6.0-8.0 and the temperature range of 20 °C-40 °C. Thin-layer chromatography and high-performance liquid chromatography of the enzymolysis products of the substrate confirmed the enzyme to be endodextranase. Under the optimal conditions, the ratio of IMOs could reach 91.8% of the hydrolyzate. The final products were found to efficiently scavenge the 2,2-diphenyl-1-picrylhydrazyl, hydroxyl, and superoxide anion radicals. In general, dextranase and hydrolyzates have high potential prospects for application in the future.
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Affiliation(s)
- Xin Liu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/ Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, P. R. China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, P. R. China
| | - Tian Deng
- Jiangsu Key Laboratory of Marine Bioresources and Environment/ Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, P. R. China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, P. R. China
| | - Xueqin Liu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/ Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, P. R. China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, P. R. China
| | - Xiaohua Lai
- Jiangsu Key Laboratory of Marine Bioresources and Environment/ Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, P. R. China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, P. R. China
| | - Yanli Feng
- Jiangsu Key Laboratory of Marine Bioresources and Environment/ Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, P. R. China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, P. R. China
| | - Mingsheng Lyu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/ Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, P. R. China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, P. R. China
- Collaborative Innovation Center of Modern Biological Manufacturing, Anhui University, Hefei, P. R. China
| | - Shujun Wang
- Jiangsu Key Laboratory of Marine Bioresources and Environment/ Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, P. R. China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, P. R. China
- Collaborative Innovation Center of Modern Biological Manufacturing, Anhui University, Hefei, P. R. China
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8
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Su Z, Luo J, Li X, Pinelo M. Enzyme membrane reactors for production of oligosaccharides: A review on the interdependence between enzyme reaction and membrane separation. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116840] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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9
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Alginate–pectin co-encapsulation of dextransucrase and dextranase for oligosaccharide production from sucrose feedstocks. Bioprocess Biosyst Eng 2019; 42:1681-1693. [DOI: 10.1007/s00449-019-02164-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 06/24/2019] [Indexed: 10/26/2022]
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10
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Immobilization of Dextranase Using Anionic Natural Polymer Alginate as a Matrix for the Degradation of a Long-Chain Biopolymer (Dextran). INT J POLYM SCI 2019. [DOI: 10.1155/2019/1354872] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Alginate is an inexpensive, nontoxic, valuable biopolymer utilized in the study for the immobilization of commercially applicable biocatalyst dextranase. Dextranase was immobilized by an entrapment method, and alginate hydrogel spheres were synthesized after optimizing several parameters. A sodium alginate concentration of 4.0% was noticed to be suitable along with a calcium chloride concentration of 0.2 molar after providing a curing time of 20 minutes. After comparing the characteristics of the entrapped enzyme with those of the soluble one, it was observed that the characteristics were more or less the same except for the change in reaction time which was noticed to be prolonged in the case of entrapped dextranase while the change in temperature and pH optima was not observed. The variation in Vmax and Km values of dextranase after entrapment was also noted. However, after extensive stability examination studies, it was found that dextranase became more stable after entrapment; as a result, it retained more than 50% of its original activity at elevated temperature even after exposure for about 2.0 hours. The reusability of dextranase was up to 7.0 cycles after performing catalytic activity under constant condition.
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11
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Volkov PV, Gusakov AV, Rubtsova EA, Rozhkova AM, Matys VY, Nemashkalov VA, Sinitsyn AP. Properties of a recombinant GH49 family dextranase heterologously expressed in two recipient strains of Penicillium species. Biochimie 2019; 157:123-130. [DOI: 10.1016/j.biochi.2018.11.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 11/19/2018] [Indexed: 10/27/2022]
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12
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Wang Y, Wang Q, Song X, Cai J. Hydrophilic polyethylenimine modified magnetic graphene oxide composite as an efficient support for dextranase immobilization with improved stability and recyclable performance. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2018.10.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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13
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SUFIATE BRUNAL, SOARES FILIPPEE, GOUVEIA ANGÉLICAS, MOREIRA SAMARAS, CARDOSO EVANDROF, TAVARES GABRIELLAP, BRAGA FABIOR, ARAÚJO JACKSONVDE, QUEIROZ JOSÉHDE. Statistical tools application on dextranase production from Pochonia chlamydosporia (VC4) and its application on dextran removal from sugarcane juice. ACTA ACUST UNITED AC 2018; 90:461-470. [DOI: 10.1590/0001-3765201820160333] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 08/15/2016] [Indexed: 11/22/2022]
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Wang Y, Wang Q, Song X, Cai J. Improving the stability and reusability of dextranase by immobilization on polyethylenimine modified magnetic particles. NEW J CHEM 2018. [DOI: 10.1039/c8nj00227d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The stability and reusability of dextranase were improved by immobilizing it on polyethylenimine modified magnetic particles.
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Affiliation(s)
- Yajie Wang
- Department of Pharmacy
- Anhui Medical College
- Hefei
- P. R. China
| | - Qiang Wang
- Department of Pharmacy
- Anhui Medical College
- Hefei
- P. R. China
| | - Xiaoping Song
- Department of Pharmacy
- Anhui Medical College
- Hefei
- P. R. China
| | - Jingjing Cai
- Department of Pharmacy
- Anhui Medical College
- Hefei
- P. R. China
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15
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Chitosan hydrogel microspheres: an effective covalent matrix for crosslinking of soluble dextranase to increase stability and recycling efficiency. Bioprocess Biosyst Eng 2016; 40:451-461. [PMID: 27904965 DOI: 10.1007/s00449-016-1713-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 11/25/2016] [Indexed: 02/07/2023]
Abstract
Dextranase is a unique biocatalyst that has high specificity and stereo-selectivity towards a complex biopolymer known as dextran. Dextranase has wide industrial application, but most of the time harsh environmental conditions adversely affect the functionality and stability of the enzyme. To overcome this issue, a covalent cross-linking immobilization method was adapted in the current study utilizing a nontoxic and biocompatible matrix known as chitosan. Chitosan hydrogel microspheres were synthesized using chitosan which exhibited noteworthy physical and mechanical strength. After treatment with glutaraldehyde, chitosan hydrogel microspheres were used for immobilization of dextranase. The kinetic characteristics of immobilized dextranase were compared with that of the soluble enzyme. A shift in optimum pH and temperature from 7.0 to 7.5 and 50 to 60 °C was observed after immobilization, respectively. Recycling efficiency, thermal stability, and activation energy distinctly improved after immobilization, whereas anchoring of substrate at the active site of the soluble dextranase exhibited an increase in K m with no change in V max after crosslinking. This technique involves the reduction in the size of carrier molecules (microspheres) that provide a larger surface area for improved immobilization efficiency. Therefore, it is concluded that increased stability and reusability of this immobilized biocatalyst makes it a promising aspirant for the utilization at commercial level.
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Wang X, Cheng H, Lu M, Fang Y, Jiao Y, Li W, Zhao G, Wang S. Dextranase from Arthrobacter oxydans KQ11-1 inhibits biofilm formation by polysaccharide hydrolysis. BIOFOULING 2016; 32:1223-1233. [PMID: 27762637 DOI: 10.1080/08927014.2016.1239722] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Dental plaque is a biofilm of water-soluble and water-insoluble polysaccharides, produced primarily by Streptococcus mutans. Dextranase can inhibit biofilm formation. Here, a dextranase gene from the marine microorganism Arthrobacter oxydans KQ11-1 is described, and cloned and expressed using E. coli DH5α competent cells. The recombinant enzyme was then purified and its properties were characterized. The optimal temperature and pH were determined to be 60°C and 6.5, respectively. High-performance liquid chromatography data show that the final hydrolysis products were glucose, maltose, maltotriose, and maltotetraose. Thus, dextranase can inhibit the adhesive ability of S. mutans. The minimum biofilm inhibition and reduction concentrations (MBIC50 and MBRC50) of dextranase were 2 U ml-1 and 5 U ml-1, respectively. Scanning electron microscopy and confocal laser scanning microscope (CLSM) observations confirmed that dextranase inhibited biofilm formation and removed previously formed biofilms.
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Affiliation(s)
- Xiaobei Wang
- a Marine Resources Development Institute of Jiangsu , Lianyungang , PR China
- b Key Laboratory of Marine Biology , Nanjing Agricultural University , Nanjing , Jiangsu , PR China
| | - Huaixu Cheng
- a Marine Resources Development Institute of Jiangsu , Lianyungang , PR China
- c Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening , Huaihai Institute of Technology , Lianyungang , PR China
- d Co-Innovation Center of Jiangsu Marine Bio-industry Technology , Huaihai Institute of Technology , Lianyungang , PR China
| | - Mingsheng Lu
- a Marine Resources Development Institute of Jiangsu , Lianyungang , PR China
- c Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening , Huaihai Institute of Technology , Lianyungang , PR China
- d Co-Innovation Center of Jiangsu Marine Bio-industry Technology , Huaihai Institute of Technology , Lianyungang , PR China
| | - Yaowei Fang
- a Marine Resources Development Institute of Jiangsu , Lianyungang , PR China
- c Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening , Huaihai Institute of Technology , Lianyungang , PR China
- d Co-Innovation Center of Jiangsu Marine Bio-industry Technology , Huaihai Institute of Technology , Lianyungang , PR China
| | - Yuliang Jiao
- a Marine Resources Development Institute of Jiangsu , Lianyungang , PR China
- c Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening , Huaihai Institute of Technology , Lianyungang , PR China
- d Co-Innovation Center of Jiangsu Marine Bio-industry Technology , Huaihai Institute of Technology , Lianyungang , PR China
| | - Weijuan Li
- a Marine Resources Development Institute of Jiangsu , Lianyungang , PR China
| | - Gengmao Zhao
- b Key Laboratory of Marine Biology , Nanjing Agricultural University , Nanjing , Jiangsu , PR China
- d Co-Innovation Center of Jiangsu Marine Bio-industry Technology , Huaihai Institute of Technology , Lianyungang , PR China
| | - Shujun Wang
- a Marine Resources Development Institute of Jiangsu , Lianyungang , PR China
- c Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening , Huaihai Institute of Technology , Lianyungang , PR China
- d Co-Innovation Center of Jiangsu Marine Bio-industry Technology , Huaihai Institute of Technology , Lianyungang , PR China
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Virgen-Ortíz J, Ibarra-Junquera V, Escalante-Minakata P, Ornelas-Paz JDJ, Osuna-Castro J, González-Potes A. Kinetics and thermodynamic of the purified dextranase from Chaetomium erraticum. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcatb.2015.08.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Bilal M, Asgher M. Sandal reactive dyes decolorization and cytotoxicity reduction using manganese peroxidase immobilized onto polyvinyl alcohol-alginate beads. Chem Cent J 2015; 9:47. [PMID: 26379768 PMCID: PMC4570624 DOI: 10.1186/s13065-015-0125-0] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 09/01/2015] [Indexed: 12/07/2022] Open
Abstract
Background Fungal manganese peroxidases (MnPs) have great potential as bio-remediating agents and can be used continuously in the immobilized form like many other enzymes. Results In the present study, purified manganese peroxidase (MnP) enzyme isolated from Ganoderma lucidum IBL-05 was immobilized onto polyvinyl alcohol-alginate beads and investigated its potential for the decolorization and detoxification of new class of reactive dyes and textile wastewater. The optimal conditions for MnP immobilization were 10 % (w/v) PVA, 1.5 % sodium alginate, 3 % boric acid and 2 % CaCl2 solution. The optimum pH, temperature and kinetic parameters (Km and Vmax) for free and immobilized MnP were found to be significantly altered after immobilization. The immobilized MnP showed high decolorization efficiency for Sandal reactive dyes (78.14–92.29 %) and textile wastewater (61–80 %). Reusability studies showed that after six consecutive dye decolorization cycles, the PVA coupled MnP retained more than 60 % of its initial activity (64.9 % after 6th cycle form 92.29 % in 1st cycle) for Sandal-fix Foron Blue E2BLN dye. The water quality assurance parameters (BOD, COD and TOC) and cytotoxicity (haemolytic and brine shrimp lethality tests) studies before and after treatment were employed and results revealed that both the dyes aqueous solution and textile wastewater were cytotoxic that reduced significantly after treatment. Conclusions The decolorization and cytotoxicity outcomes indicated that immobilized MnP in PVA–alginate beads can be efficiently exploited for industrial and environmental applications, especially for remediation of textile dyes containing wastewater effluents. Dye decolorizing potential of immobilized MnP ![]()
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Affiliation(s)
- Muhammad Bilal
- Industrial Biotechnology Laboratory, Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Asgher
- Industrial Biotechnology Laboratory, Department of Biochemistry, University of Agriculture, Faisalabad, Pakistan
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Lai D, Frampton JP, Tsuei M, Kao A, Takayama S. Label-free direct visual analysis of hydrolytic enzyme activity using aqueous two-phase system droplet phase transitions. Anal Chem 2014; 86:4052-7. [PMID: 24654925 PMCID: PMC4004187 DOI: 10.1021/ac500657k] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
![]()
Dextran hydrolysis-mediated conversion
of polyethylene glycol (PEG)-dextran
(DEX) aqueous two-phase system droplets to a single phase was used
to directly visualize Dextranase activity. DEX droplets were formed
either by manual micropipetting or within a continuous PEG phase by
computer controlled actuation of an orifice connecting rounded channels
formed by backside diffused light lithography. The time required for
the two-phase to one-phase transition was dependent on the Dextranase
concentration, pH of the medium, and temperature. The apparent Michaelis
constants for Dextranase were estimated based on previously reported
catalytic constants, the binodal polymer concentration curves for
PEG-DEX phase transition for each temperature, and pH condition. The
combination of a microfluidic droplet system and phase transition
observation provides a new method for label-free direct measurement
of enzyme activity.
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Affiliation(s)
- David Lai
- Department of Biomedical Engineering and Department of Macromolecular Science and Engineering, University of Michigan, Biointerfaces Institute , 2800 Plymouth Road, NCRC Building 10 A183, Ann Arbor, Michigan 48109, United States
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20
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Zhan JF, Jiang ST, Pan LJ. Immobilization of phospholipase a1 using a polyvinyl alcohol-alginate matrix and evaluation of the effects of immobilization. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2013. [DOI: 10.1590/s0104-66322013000400004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- J. F. Zhan
- Hefei University of Technology, PR China; College of Chemical Engineering, PR China
| | | | - L. J. Pan
- Hefei University of Technology, PR China
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