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de Athayde Moncorvo Collado A, Socías SB, González-Lizárraga F, Ploper D, Vera Pingitore E, Chehín RN, Chaves S. Magnetic amyloid-based biocatalyst for the hydrolysis of urea. Food Chem 2024; 433:136830. [PMID: 37683486 DOI: 10.1016/j.foodchem.2023.136830] [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: 03/08/2023] [Revised: 06/19/2023] [Accepted: 07/05/2023] [Indexed: 09/10/2023]
Abstract
The presence of urea in wines and other alcoholic beverages represents a critical problem since it can chemically react with ethanol, which leads to the formation of ethyl carbamate, a carcinogenic agent according to the World Health Organization. Here we report the creation of a biocatalyst for the hydrolysis of urea, which could potentially be used before bottling alcoholic drinks. For this, the effective surface area of streptavidin-labeled magnetic microparticles was amplified by functionalization with biotin-labeled hen egg lysozyme amyloid fibers. Subsequently, by using copper and hydrogen peroxide induced cross-linking of unmodified proteins (CHICUP), soybean urease was immobilized to the fibers. This gave rise to a magnetic biocatalyst with remarkable urease activity, which was maintained even after 10 reuses. We propose that this strategy could be used as a platform for immobilizing other molecules to design and develop a myriad of biocatalysts for the food industry.
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Affiliation(s)
- A de Athayde Moncorvo Collado
- Instituto de Medicina Molecular y Celular Aplicada, Universidad Nacional de Tucumán-Consejo Nacional de Investigación Científicas y Técnicas- Sistema Provincial de Salud (UNT-CONICET-SIPROSA), Pasaje Manuel Dorrego, 1080. CP 4000. Tucumán, Argentina; Instituto Superior de Investigaciones Biológicas (INSIBIO, CONICET-UNT). Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT, Batalla de Chacabuco 461, CP 4000 Tucumán, Argentina.
| | - S B Socías
- Instituto de Medicina Molecular y Celular Aplicada, Universidad Nacional de Tucumán-Consejo Nacional de Investigación Científicas y Técnicas- Sistema Provincial de Salud (UNT-CONICET-SIPROSA), Pasaje Manuel Dorrego, 1080. CP 4000. Tucumán, Argentina.
| | - F González-Lizárraga
- Instituto de Medicina Molecular y Celular Aplicada, Universidad Nacional de Tucumán-Consejo Nacional de Investigación Científicas y Técnicas- Sistema Provincial de Salud (UNT-CONICET-SIPROSA), Pasaje Manuel Dorrego, 1080. CP 4000. Tucumán, Argentina.
| | - D Ploper
- Instituto de Medicina Molecular y Celular Aplicada, Universidad Nacional de Tucumán-Consejo Nacional de Investigación Científicas y Técnicas- Sistema Provincial de Salud (UNT-CONICET-SIPROSA), Pasaje Manuel Dorrego, 1080. CP 4000. Tucumán, Argentina.
| | - E Vera Pingitore
- Instituto de Medicina Molecular y Celular Aplicada, Universidad Nacional de Tucumán-Consejo Nacional de Investigación Científicas y Técnicas- Sistema Provincial de Salud (UNT-CONICET-SIPROSA), Pasaje Manuel Dorrego, 1080. CP 4000. Tucumán, Argentina.
| | - R N Chehín
- Instituto de Medicina Molecular y Celular Aplicada, Universidad Nacional de Tucumán-Consejo Nacional de Investigación Científicas y Técnicas- Sistema Provincial de Salud (UNT-CONICET-SIPROSA), Pasaje Manuel Dorrego, 1080. CP 4000. Tucumán, Argentina; Instituto Superior de Investigaciones Biológicas (INSIBIO, CONICET-UNT). Instituto de Química Biológica "Dr. Bernabé Bloj", Facultad de Bioquímica, Química y Farmacia, UNT, Batalla de Chacabuco 461, CP 4000 Tucumán, Argentina.
| | - S Chaves
- Instituto de Medicina Molecular y Celular Aplicada, Universidad Nacional de Tucumán-Consejo Nacional de Investigación Científicas y Técnicas- Sistema Provincial de Salud (UNT-CONICET-SIPROSA), Pasaje Manuel Dorrego, 1080. CP 4000. Tucumán, Argentina.
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2
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Vrdoljak V, Hrenar T, Rubčić M, Pavlović G, Friganović T, Cindrić M. Ligand-Modulated Nuclearity and Geometry in Nickel(II) Hydrazone Complexes: From Mononuclear Complexes to Acetato- and/or Phenoxido-Bridged Clusters. Int J Mol Sci 2023; 24:ijms24031909. [PMID: 36768232 PMCID: PMC9915932 DOI: 10.3390/ijms24031909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/14/2023] [Accepted: 01/16/2023] [Indexed: 01/21/2023] Open
Abstract
The propensity of 4-hydroxybenzhydrazone-related ligands derived from 3-methoxysalicylaldehyde (H2L3OMe), 4-methoxysalicylaldehyde (H2L4OMe), and salicylaldehyde (H2LH) to act as chelating and/or bridging ligands in Ni(II) complexes was investigated. Three clusters of different nuclearities, [Ni3(L3OMe)2(OAc)2(MeOH)2]∙2MeOH∙MeCN (1∙2MeOH∙MeCN), [Ni2(HL4OMe)(L4OMe)(OAc)(MeOH)2]∙4.7MeOH (2∙4.7MeOH), and [Ni4(HLH)2(LH)2(OAc)2]∙4MeOH·0.63H2O·0.5MeCN·HOAc (3∙4MeOH·0.63H2O·0.5MeCN·HOAc), were prepared from Ni(OAc)2∙4H2O and the corresponding ligand in the presence of Et3N. The hydrazones in these acetato- and phenoxido-bridged clusters acted as singly or doubly deprotonated ligands. When pyridine was used, mononuclear complexes with the square-planar geometry seemed to be favoured, as found for complexes [Ni(L3OMe)(py)] (4), [Ni(L4Ome)(py)] (5) and [Ni(LH)(py)] (6). Ligand substituent effects and the stability of square-planar complexes were investigated and quantified by extensive quantum chemical analysis. Obtained results showed that standard Gibbs energies of binding were lower for square-planar than for octahedral complexes. Starting from [MoO2(L)(EtOH)] complexes as precursors and applying the metal-exchange procedure, the mononuclear complexes [Ni(HL3OMe)2]∙MeOH (7∙MeOH) and [Ni(HLH)]∙2MeOH (9∙2MeOH) and hybrid organic-inorganic compound [Ni2(HL4OMe)2(CH3OH)4][Mo4O10(OCH3)6] (10) were achieved. The octahedral complexes [Ni(HL)2] (7-9) can also be obtained by the direct synthesis from Ni(Oac)2∙4H2O and the appropriate ligand under specific reaction conditions. Crystal and molecular structures of 1∙2MeOH∙MeCN, 2∙4.7MeOH, 3∙4MeOH∙0.63H2O∙0.5MeCN∙HOAc, 4, 5, 9∙2MeOH, and 10 were determined by the single-crystal X-ray diffraction method.
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Affiliation(s)
- Višnja Vrdoljak
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
- Correspondence: ; Tel.: +385-1-4606353
| | - Tomica Hrenar
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
| | - Mirta Rubčić
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
| | - Gordana Pavlović
- Department of Applied Chemistry, Faculty of Textile Technology, University of Zagreb, Prilaz Baruna Filipovića 28a, 10000 Zagreb, Croatia
| | - Tomislav Friganović
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
| | - Marina Cindrić
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10000 Zagreb, Croatia
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Shao G, Himmelfarb J, Hinds BJ. Strategies for optimizing urea removal to enable portable kidney dialysis: A reappraisal. Artif Organs 2022; 46:997-1011. [PMID: 35383963 DOI: 10.1111/aor.14185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 12/23/2021] [Accepted: 01/10/2022] [Indexed: 12/01/2022]
Abstract
BACKGROUND Portable hemodialysis has the potential to improve health outcomes and quality of life for patients with kidney failure at reduced costs. Urea removal, required for dialysate regeneration, is a central function of any existing/potential portable dialysis device. Urea in the spent dialysate coexists with non-urea uremic toxins, nutrients, and electrolytes, all of which will interfere with the urea removal efficiency, regardless of whether the underlying urea removal mechanism is based on urease conversion, direct urea adsorption, or oxidation. The aim of the current review is to identify the amount of the most prevalent chemicals being removed during a single dialysis session and evaluate the potential benefits of an urea-selective membrane for portable dialysis. METHODS We have performed a literature search using Web of Science and PubMed databases to find available articles reporting (or be able to calculate from blood plasma concentration) > 5 mg of individually quantified solutes removed during thrice-weekly hemodialysis sessions. If multiple reports of the same solute were available, the reported values were averaged, and the geometric mean of standard deviations was taken. Further critical literature analysis of reported dialysate regeneration methods was performed using Web of Science and PubMed databases. RESULTS On average, 46.0 g uremic retention solutes are removed in a single conventional dialysis session, out of which urea is only 23.6 g. For both urease- and sorbent-based urea removal mechanisms, amino acids, with 7.7 g removal per session, could potentially interfere with urea removal efficiency. Additionally for the oxidation-based urea removal system, plentiful nutrients such as glucose (24.0 g) will interfere with urea removal by competition. Using a nanofiltration membrane between dialysate and oxidation unit with a molecular weight cutoff (MWCO) of ~200 Da, 67.6 g of non-electrolyte species will be removed in a single dialysis session, out of which 44.0 g are non-urea molecules. If the membrane MWCO is further decreased to 120 Da, the mass of non-electrolyte non-urea species will drop to 9.3 g. Reverse osmosis membranes have been shown to be both effective at blocking the transport of non-urea species (creatinine for example with ~90% rejection ratio), and permissive for urea transport (~20% rejection ratio), making them a promising urea selective membrane to increase the efficiency of the oxidative urea removal system. CONCLUSIONS Compiled are quantified solute removal amounts greater than 5 mg per session during conventional hemodialysis treatments, to act as a guide for portable dialysis system design. Analysis shows that multiple chemical species in the dialysate interfere with all proposed portable urea removal systems. This suggests the need for an additional protective dialysate loop coupled to urea removal system and an urea-selective membrane.
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Affiliation(s)
- Guozheng Shao
- Department of Materials Science & Engineering, University of Washington, Seattle, Washington, USA.,Center for Dialysis Innovation, University of Washington, Seattle, Washington, USA
| | - Jonathan Himmelfarb
- Center for Dialysis Innovation, University of Washington, Seattle, Washington, USA.,Division of Nephrology, Department of Medicine, University of Washington, Seattle, Washington, USA
| | - Bruce J Hinds
- Department of Materials Science & Engineering, University of Washington, Seattle, Washington, USA.,Center for Dialysis Innovation, University of Washington, Seattle, Washington, USA
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Saif A, Cuccurullo A, Gallipoli D, Perlot C, Bruno AW. Advances in Enzyme Induced Carbonate Precipitation and Application to Soil Improvement: A Review. MATERIALS 2022; 15:ma15030950. [PMID: 35160900 PMCID: PMC8840754 DOI: 10.3390/ma15030950] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 01/07/2022] [Accepted: 01/15/2022] [Indexed: 01/27/2023]
Abstract
Climate change and global warming have prompted a notable shift towards sustainable geotechnics and construction materials within the geotechnical engineer’s community. Earthen construction materials, in particular, are considered sustainable due to their inherent characteristics of having low embodied and operational energies, fire resistance, and ease of recyclability. Despite these attributes, they have not been part of the mainstream construction due to their susceptibility to water-induced deterioration. Conventional soil improvement techniques are generally expensive, energy-intensive, and environmentally harmful. Recently, biostabilization has emerged as a sustainable alternative that can overcome some of the limitations of existing soil improvement methods. Enzyme-induced carbonate precipitation (EICP) is a particularly promising technique due to its ease of application and compatibility with different soil types. EICP exploits the urease enzyme as a catalyst to promote the hydrolysis of urea inside the pore water, which, in the presence of calcium ions, results in the precipitation of calcium carbonate. The purpose of this paper is to provide a state-of-the-art review of EICP stabilization, highlighting the potential application of this technique to field problems and identifying current research gaps. The paper discusses recent progress, focusing on the most important factors that govern the efficiency of the chemical reactions and the precipitation of a spatially homogenous carbonate phase. The paper also discusses other aspects of EICP stabilization, including the degree of ground improvement, the prediction of the pore structure of the treated soil by numerical simulations, and the remediation of potentially toxic EICP by-products.
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Affiliation(s)
- Ahsan Saif
- Université de Pau et des Pays de l’Adour, E2S UPPA, SIAME, 64600 Anglet, France; (A.C.); (C.P.)
- Correspondence:
| | - Alessia Cuccurullo
- Université de Pau et des Pays de l’Adour, E2S UPPA, SIAME, 64600 Anglet, France; (A.C.); (C.P.)
| | - Domenico Gallipoli
- Dipartimento di Ingegneria Civile, Chimica e Ambientale, Università degli Studi di Genova, 16145 Genoa, Italy; (D.G.); (A.W.B.)
| | - Céline Perlot
- Université de Pau et des Pays de l’Adour, E2S UPPA, SIAME, 64600 Anglet, France; (A.C.); (C.P.)
- Institut Universitaire de France (IUF), CEDEX 05, 75231 Paris, France
| | - Agostino Walter Bruno
- Dipartimento di Ingegneria Civile, Chimica e Ambientale, Università degli Studi di Genova, 16145 Genoa, Italy; (D.G.); (A.W.B.)
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Ren C, Wang H, Cheng Y, Ma X, Wang Y. Cyclodextrin polymer-confined urease for the fast and efficient removal of urea. NEW J CHEM 2022. [DOI: 10.1039/d2nj03303h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient urease immobilized material was synthesized for fast and efficient urea removal with high pH and temperature tolerance.
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Affiliation(s)
- Cui Ren
- Department of Chemistry, School of Science, Tianjin University, Tianjin, 30072, China
| | - He Wang
- Department of Chemistry, School of Science, Tianjin University, Tianjin, 30072, China
| | - Yue Cheng
- Department of Chemistry, School of Science, Tianjin University, Tianjin, 30072, China
| | - Xiaofei Ma
- Department of Chemistry, School of Science, Tianjin University, Tianjin, 30072, China
| | - Yong Wang
- Department of Chemistry, School of Science, Tianjin University, Tianjin, 30072, China
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Geremia I, A.W. Jong J, van Nostrum CF, Hennink WE, G.F. Gerritsen K, Stamatialis D. New mixed matrix membrane for the removal of urea from dialysate solution. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119408] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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7
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Rather AH, Khan RS, Wani TU, Beigh MA, Sheikh FA. Overview on immobilization of enzymes on synthetic polymeric nanofibers fabricated by electrospinning. Biotechnol Bioeng 2021; 119:9-33. [PMID: 34672360 DOI: 10.1002/bit.27963] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 09/07/2021] [Accepted: 10/13/2021] [Indexed: 01/19/2023]
Abstract
The arrangement and type of support has a significant impact on the efficiency of immobilized enzymes. 1-dimensional fibrous materials can be one of the most desirable supports for enzyme immobilization. This is due to their high surface area to volume ratio, internal porosity, ease of handling, and high mechanical stability, all of which allow a higher enzyme loading, release and finally lead to better catalytic efficiency. Fortunately, the enzymes can reside inside individual nanofibers to remain encapsulated and retain their three-dimensional structure. These properties can protect the enzyme's tolerance against harsh conditions such as pH variations and high temperature, and this can probably enhance the enzyme's stability. This review article will discuss the immobilization of enzymes on synthetic polymers, which are fabricated into nanofibers by electrospinning. This technique is rapidly gaining popularity as one of the most practical ways to fibricate polymer, metal oxide, and composite micro or nanofibers. As a result, there is interest in using nanofibers to immobilize enzymes. Furthermore, present research on electrospun nanofibers for enzyme immobilization is primarily limited to the lab scale and industrial scale is still challanging. The primary future research objectives of this paper is to investigate the use of electrospun nanofibers for enzyme immobilization, which includes increasing yield to transfer biological products into commercial applications.
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Affiliation(s)
- Anjum Hamid Rather
- Department of Nanotechnology, University of Kashmir, Hazratbal, Srinagar, Jammu and Kashmir, India
| | - Rumysa Saleem Khan
- Department of Nanotechnology, University of Kashmir, Hazratbal, Srinagar, Jammu and Kashmir, India
| | - Taha Umair Wani
- Department of Nanotechnology, University of Kashmir, Hazratbal, Srinagar, Jammu and Kashmir, India
| | - Mushtaq A Beigh
- Department of Nanotechnology, University of Kashmir, Hazratbal, Srinagar, Jammu and Kashmir, India
| | - Faheem A Sheikh
- Department of Nanotechnology, University of Kashmir, Hazratbal, Srinagar, Jammu and Kashmir, India
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Reginald SS, Etzerodt M, Fapyane D, Chang IS. Functional Expression of a Mo-Cu-Dependent Carbon Monoxide Dehydrogenase (CODH) and Its Use as a Dissolved CO Bio-microsensor. ACS Sens 2021; 6:2772-2782. [PMID: 34253013 DOI: 10.1021/acssensors.1c01243] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report the heterologous expression in Escherichia coli of a Mo-Cu-containing carbon monoxide dehydrogenase (Mo-Cu CODH) from Hydrogenophaga pseudoflava, which resulted in an active protein catalyzing CO oxidation to CO2. By supplying the E. coli growth medium with Na2MoO4 (Mo) and CuSO4 (Cu), the Mo-Cu CODH metal cofactors precursors, the expressed L-subunit was found to have CO-oxidation activity even without the M- and S- subunits. This successful expression of CO-oxidizing-capable single L-subunit provides direct evidence of its role as the catalytic center of Mo-Cu CODH that has not been discovered and studied before. Subsequently, we used the expressed protein to construct a CO bio-microsensor based on a newly developed fast and sensitive Clark-type CO2 transducer using an aprotic solvent/ionic liquid electrolyte. The CO bio-microsensor exhibited a linear response to CO concentration in the 0-9 μM range, with a limit of detection (LOD) of 15 nM CO. The sensor uses a mixture of Mo-Cu CODH's L-subunit/Mo, Cu cofactors/methylene blue, confined in the enzyme chamber that is placed in front of a CO2 transducer. The optimized sensor's sensitivity and performance were retained to levels of at least 80% for 1 week of continuous polarization and operation in an aqueous medium. We have also demonstrated the use of an alkaline front-trap solution to make a completely O2/CO2 interference-free microsensor. The CO bio-microsensor developed in this study is potentially useful as an analytical tool for the detection of trace CO in dissolved form for monitoring dissolved CO concentration dynamics in natural or synthetic systems.
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Affiliation(s)
- Stacy Simai Reginald
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, 261 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Michael Etzerodt
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10, Aarhus 8000, Denmark
| | - Deby Fapyane
- Aarhus University Centre of Water Technology (WATEC), Department of Bioscience, Aarhus University, Ny Munkegade 116, Aarhus 8000, Denmark
| | - In Seop Chang
- School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology, 261 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
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Pinto Vilar R, Ikuma K. Adsorption of urease as part of a complex protein mixture onto soil and its implications for enzymatic activity. Biochem Eng J 2021. [DOI: 10.1016/j.bej.2021.108026] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Mai AQ, Bánsági T, Taylor AF, Pojman JA. Reaction-diffusion hydrogels from urease enzyme particles for patterned coatings. Commun Chem 2021; 4:101. [PMID: 36697546 PMCID: PMC9814597 DOI: 10.1038/s42004-021-00538-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 06/07/2021] [Indexed: 01/28/2023] Open
Abstract
The reaction and diffusion of small molecules is used to initiate the formation of protective polymeric layers, or biofilms, that attach cells to surfaces. Here, inspired by biofilm formation, we present a general method for the growth of hydrogels from urease enzyme-particles by combining production of ammonia with a pH-regulated polymerization reaction in solution. We show through experiments and simulations how the propagating basic front and thiol-acrylate polymerization were continuously maintained by the localized urease reaction in the presence of urea, resulting in hydrogel layers around the enzyme particles at surfaces, interfaces or in motion. The hydrogels adhere the enzyme-particles to surfaces and have a tunable growth rate of the order of 10 µm min-1 that depends on the size and spatial distribution of particles. This approach can be exploited to create enzyme-hydrogels or chemically patterned coatings for applications in biocatalytic flow reactors.
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Affiliation(s)
- Anthony Q. Mai
- grid.64337.350000 0001 0662 7451Department of Chemistry & The Macromolecular Studies Group, Louisiana State University, Baton Rouge, LA USA
| | - Tamás Bánsági
- grid.11835.3e0000 0004 1936 9262Chemical and Biological Engineering, University of Sheffield, Sheffield, UK ,grid.6572.60000 0004 1936 7486Department of Chemistry, University of Birmingham, Birmingham, UK
| | - Annette F. Taylor
- grid.11835.3e0000 0004 1936 9262Chemical and Biological Engineering, University of Sheffield, Sheffield, UK
| | - John A. Pojman
- grid.64337.350000 0001 0662 7451Department of Chemistry & The Macromolecular Studies Group, Louisiana State University, Baton Rouge, LA USA
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Hussain A, Rafeeq H, Afsheen N, Jabeen Z, Bilal M, Iqbal HMN. Urease-Based Biocatalytic Platforms―A Modern View of a Classic Enzyme with Applied Perspectives. Catal Letters 2021. [DOI: 10.1007/s10562-021-03647-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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12
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Fapyane D, Berillo D, Marty JL, Revsbech NP. Urea Biosensor Based on a CO 2 Microsensor. ACS OMEGA 2020; 5:27582-27590. [PMID: 33134722 PMCID: PMC7594316 DOI: 10.1021/acsomega.0c04146] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 10/02/2020] [Indexed: 06/11/2023]
Abstract
Urea sensors based on electrodes in direct contact with the medium have limited long-term stability when exposed to complex media. Here, we present a urea biosensor based on urease immobilized in an alginate polymer, buffered at pH 6, and placed in front of a newly developed fast and sensitive CO2 microsensor, where the electrodes are shielded by a gas-permeable membrane. The CO2 produced by the urease in the presence of urea diffuses into the microsensor and is reduced at a Ag cathode. Oxygen interference is prevented by a Cr2+ trap. The 95% response time to changes in urea concentration was 120 s with a linear calibration curve in the range 0-1000 μM and a detection limit of 1 μM. The Ni2+ cofactor to improve sensor performance was continuously supplied from a reservoir behind the sensor tip. The stability of the urea sensor was optimized by the addition of bovine serum albumin as a stabilizer to the urease/alginate mixture that was cross-linked with glutaraldehyde and Ca2+ ions. This immobilization strategy resulted in about 70% of the initial urea sensor sensitivity after two weeks of continuous operation. The sensor was successfully tested in blood serum.
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Affiliation(s)
- Deby Fapyane
- Aarhus University
Centre for Water Technology (WATEC), Department of Biology, Aarhus University, Ny Munkegade 114-116, Aarhus
C 8000, Denmark
| | - Dmitriy Berillo
- Aarhus University
Centre for Water Technology (WATEC), Department of Biology, Aarhus University, Ny Munkegade 114-116, Aarhus
C 8000, Denmark
| | - Jean-Louis Marty
- BAE (Biocapteurs-Analyses-Environnement), Université de Perpignan Via Domitia, 52 Avenue Paul Alduy, Perpignan
Cedex 66860, France
| | - Niels Peter Revsbech
- Aarhus University
Centre for Water Technology (WATEC), Department of Biology, Aarhus University, Ny Munkegade 114-116, Aarhus
C 8000, Denmark
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13
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Ottone C, Romero O, Aburto C, Illanes A, Wilson L. Biocatalysis in the winemaking industry: Challenges and opportunities for immobilized enzymes. Compr Rev Food Sci Food Saf 2020; 19:595-621. [PMID: 33325181 DOI: 10.1111/1541-4337.12538] [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] [Received: 08/05/2019] [Revised: 12/02/2019] [Accepted: 12/17/2019] [Indexed: 12/18/2022]
Abstract
Enzymes are powerful catalysts already being used in a large number of industrial processes. Impressive advantages in enzyme catalysts improvement have occurred in recent years aiming to improve their performance under harsh operation conditions far away from those of their cellular habitat. Production levels of the winemaking industry have experienced a remarkable increase, and technological innovations have been introduced for increasing the efficiency at different process steps or for improving wine quality, which is a key issue in this industry. Enzymes, such as pectinases and proteases, have been traditionally used, and others, such as glycosidases, have been more recently introduced in the modern wine industry, and many dedicated studies refer to the improvement of enzyme performance under winemaking conditions. Within this framework, a thorough review on the role of enzymes in winemaking is presented, with special emphasis on the use of immobilized enzymes as a significant strategy for catalyst improvement within an industry in which enzymes play important roles that are to be reinforced paralleling innovation.
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Affiliation(s)
- Carminna Ottone
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Oscar Romero
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Carla Aburto
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Andrés Illanes
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Lorena Wilson
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
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van Gelder MK, Jong JAW, Folkertsma L, Guo Y, Blüchel C, Verhaar MC, Odijk M, Van Nostrum CF, Hennink WE, Gerritsen KGF. Urea removal strategies for dialysate regeneration in a wearable artificial kidney. Biomaterials 2020; 234:119735. [PMID: 31958714 DOI: 10.1016/j.biomaterials.2019.119735] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 12/05/2019] [Accepted: 12/25/2019] [Indexed: 12/31/2022]
Abstract
The availability of a wearable artificial kidney (WAK) that provides dialysis outside the hospital would be an important advancement for dialysis patients. The concept of a WAK is based on regeneration of a small volume of dialysate in a closed-loop. Removal of urea, the primary waste product of nitrogen metabolism, is the major challenge for the realization of a WAK since it is a molecule with low reactivity that is difficult to adsorb while it is the waste solute with the highest daily molar production. Currently, no efficient urea removal technology is available that allows for miniaturization of the WAK to a size and weight that is acceptable for patients to carry. Several urea removal strategies have been explored, including enzymatic hydrolysis by urease, electro-oxidation and sorbent systems. However, thus far, these methods have toxic side effects, limited removal capacity or slow removal kinetics. This review discusses different urea removal strategies for application in a wearable dialysis device, from both a chemical and a medical perspective.
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Affiliation(s)
- Maaike K van Gelder
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands
| | - Jacobus A W Jong
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands; Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, the Netherlands
| | - Laura Folkertsma
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands; BIOS-Lab on a Chip Group, MESA+ Institute of Nanotechnology, Technical Medical Center, Max Planck Center for Complex Fluid Dynamics, University of Twente, 7522 NH, Enschede, the Netherlands
| | - Yong Guo
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, the Netherlands
| | | | - Marianne C Verhaar
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands
| | - Mathieu Odijk
- BIOS-Lab on a Chip Group, MESA+ Institute of Nanotechnology, Technical Medical Center, Max Planck Center for Complex Fluid Dynamics, University of Twente, 7522 NH, Enschede, the Netherlands
| | - Cornelus F Van Nostrum
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, the Netherlands
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, the Netherlands
| | - Karin G F Gerritsen
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX, Utrecht, the Netherlands.
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Akkas T, Zakharyuta A, Taralp A, Ow-Yang CW. Cross-linked enzyme lyophilisates (CLELs) of urease: A new method to immobilize ureases. Enzyme Microb Technol 2020; 132:109390. [DOI: 10.1016/j.enzmictec.2019.109390] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 08/01/2019] [Accepted: 08/04/2019] [Indexed: 12/31/2022]
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16
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Jáčová J, Jořenek M, Pospíšková K, Najdekr L, Zajoncová L, Friedecký D, Adam T. Urease-immobilized magnetic microparticles in urine sample preparation for metabolomic analysis by gas chromatography-mass spectrometry. J Chromatogr A 2019; 1605:360355. [DOI: 10.1016/j.chroma.2019.07.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 06/04/2019] [Accepted: 07/01/2019] [Indexed: 11/16/2022]
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18
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Yang D, Fan J, Cao F, Deng Z, Pojman JA, Ji L. Immobilization adjusted clock reaction in the urea–urease–H+ reaction system. RSC Adv 2019; 9:3514-3519. [PMID: 35518065 PMCID: PMC9060300 DOI: 10.1039/c8ra09244c] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 01/18/2019] [Indexed: 12/21/2022] Open
Abstract
The bell-shaped reactivity-pH curve is the fundamental reason that the temporal programmable kinetic switch in clock reactions can be obtained in bio-competitive enzymatic reactions. In this work, urease was loaded on small resin particles through ionic binding. Experimental results reveal that the immobilization not only increased the stability of the enzyme and the reproducibility of the clock reaction, but also shifted the bell-shaped activity curve to lower pHs. The latter change enables the clock reaction to occur from an initial pH of 2.3, where the free enzyme had already lost its activity. Two mechanisms explain the influence of the immobilization on the clock reaction. Immobilization modified the pH sensitive functional groups on the enzyme, shifting the activity curve to a more acidic region, and reduced diffusion alters the enzyme dynamics. The reported immobilization shifts the bell-shaped reactivity-pH curve to lower pHs and enables the clock reaction to occur from a very low initial pH, where the free enzyme had already lost its activity.![]()
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Affiliation(s)
- Dan Yang
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
| | - Junhe Fan
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
| | - Fengyi Cao
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
| | - Zuojun Deng
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
| | - John A. Pojman
- Department of Chemistry
- Louisiana State University
- Baton Rouge
- USA
| | - Lin Ji
- Department of Chemistry
- Capital Normal University
- Beijing 100048
- China
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19
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Yang L, Liu X, Zhou N, Tian Y. Characteristics of refold acid urease immobilized covalently by graphene oxide-chitosan composite beads. J Biosci Bioeng 2019; 127:16-22. [DOI: 10.1016/j.jbiosc.2018.06.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 06/11/2018] [Accepted: 06/14/2018] [Indexed: 11/16/2022]
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20
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Wang TR, Zhou QC, Ren JL, Zhu MJ, Xie RM, Sheng GH. Fluorescence Spectral Study on the Interaction Between Copper(II) Complex with (E)-3-(2,3-Dihydrobenzo[b][1,4] Dioxin-6-Yl) Acrylic Acid and Urease. J STRUCT CHEM+ 2018. [DOI: 10.1134/s0022476618070211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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Kappaun K, Piovesan AR, Carlini CR, Ligabue-Braun R. Ureases: Historical aspects, catalytic, and non-catalytic properties - A review. J Adv Res 2018; 13:3-17. [PMID: 30094078 PMCID: PMC6077230 DOI: 10.1016/j.jare.2018.05.010] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 05/22/2018] [Accepted: 05/24/2018] [Indexed: 12/11/2022] Open
Abstract
Urease (urea amidohydrolase, EC 3.5.1.5) is a nickel-containing enzyme produced by plants, fungi, and bacteria that catalyzes the hydrolysis of urea into ammonia and carbamate. Urease is of historical importance in Biochemistry as it was the first enzyme ever to be crystallized (1926). Finding nickel in urease's active site (1975) was the first indication of a biological role for this metal. In this review, historical and structural features, kinetics aspects, activation of the metallocenter and inhibitors of the urea hydrolyzing activity of ureases are discussed. The review also deals with the non-enzymatic biological properties, whose discovery 40 years ago started a new chapter in the study of ureases. Well recognized as virulence factors due to the production of ammonia and alkalinization in diseases by urease-positive microorganisms, ureases have pro-inflammatory, endocytosis-inducing and neurotoxic activities that do not require ureolysis. Particularly relevant in plants, ureases exert insecticidal and fungitoxic effects. Data on the jack bean urease and on jaburetox, a recombinant urease-derived peptide, have indicated that interactions with cell membrane lipids may be the basis of the non-enzymatic biological properties of ureases. Altogether, with this review we wanted to invite the readers to take a second look at ureases, very versatile proteins that happen also to catalyze the breakdown of urea into ammonia and carbamate.
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Affiliation(s)
- Karine Kappaun
- Brain Institute (InsCer), Pontifícia Universidade Católica do Rio Grande do Sul, Avenida Ipiranga 6690, Prédio 63, Porto Alegre, RS CEP 90610-000, Brazil
- Graduate Program in Medicine and Health Sciences, School of Medicine, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Angela Regina Piovesan
- Brain Institute (InsCer), Pontifícia Universidade Católica do Rio Grande do Sul, Avenida Ipiranga 6690, Prédio 63, Porto Alegre, RS CEP 90610-000, Brazil
- Graduate Program in Cellular and Molecular Biology, Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
| | - Celia Regina Carlini
- Brain Institute (InsCer), Pontifícia Universidade Católica do Rio Grande do Sul, Avenida Ipiranga 6690, Prédio 63, Porto Alegre, RS CEP 90610-000, Brazil
- Graduate Program in Medicine and Health Sciences, School of Medicine, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil
| | - Rodrigo Ligabue-Braun
- Graduate Program in Cellular and Molecular Biology, Center of Biotechnology, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil
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22
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Bliem C, Piccinini E, Knoll W, Azzaroni O. Enzyme Multilayers on Graphene-Based FETs for Biosensing Applications. Methods Enzymol 2018; 609:23-46. [PMID: 30244792 DOI: 10.1016/bs.mie.2018.06.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Electrochemical sensors represent a powerful tool for real-time measurement of a variety of analytes of much significance to different areas, ranging from clinical diagnostics to food technology. Point-of-care devices which can be used at patient bedside or for online monitoring of critical parameters are of great importance in clinical daily routine. In this work, portable, low-cost electrochemical sensors for a fast and reliable detection of the clinically relevant analyte urea have been developed. The intrinsic pH sensitivity of reduced graphene oxide (rGO)-based field-effect transistors (FETs) was exploited to monitor the enzymatic hydrolysis of urea. The functionalization of the sensor platform using the layer-by-layer technique is especially advantageous for the immobilization of the biorecognition element provided that this approach preserves the enzyme integrity as well as the rGO surface. The great selectivity of the enzyme (urease) combined with the high sensitivity of rGO-based FETs result in the construction of urea biosensors with a limit of detection (LOD) of 1μM and a linear range up to 1mM. Quantification of Cu2+ with a LOD down to 10nM was performed by taking advantage of the specific inhibition of urease in the presence of heavy metals. These versatile biosensors offer great possibilities for further development of highly sensitive enzyme-based FETs for real-time, label-free detection of a wide variety of clinically relevant analytes.
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Affiliation(s)
- Christina Bliem
- AIT Austrian Institute of Technology GmbH, Biosensor Technologies, Vienna, Austria.
| | - Esteban Piccinini
- INIFTA Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)-Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata-CONICET, La Plata, Argentina
| | - Wolfgang Knoll
- AIT Austrian Institute of Technology GmbH, Biosensor Technologies, Vienna, Austria
| | - Omar Azzaroni
- INIFTA Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA)-Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata-CONICET, La Plata, Argentina.
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23
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Korschelt K, Schwidetzky R, Pfitzner F, Strugatchi J, Schilling C, von der Au M, Kirchhoff K, Panthöfer M, Lieberwirth I, Tahir MN, Hess C, Meermann B, Tremel W. CeO 2-x nanorods with intrinsic urease-like activity. NANOSCALE 2018; 10:13074-13082. [PMID: 29961799 DOI: 10.1039/c8nr03556c] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The large-scale production and ecotoxicity of urea make its removal from wastewater a health and environmental challenge. Whereas the industrial removal of urea relies on hydrolysis at elevated temperatures and high pressure, nature solves the urea disposal problem with the enzyme urease under ambient conditions. We show that CeO2-x nanorods (NRs) act as the first and efficient green urease mimic that catalyzes the hydrolysis of urea under ambient conditions with an activity (kcat = 9.58 × 101 s-1) about one order of magnitude lower than that of the native jack bean urease. The surface properties of CeO2-x NRs were probed by varying the Ce4+/Ce3+ ratio through La doping. Although La substitution increased the number of surface defects, the reduced number of Ce4+ sites with higher Lewis acidity led to a slight decrease of their catalytic activity. CeO2-x NRs are stable against pH changes and even to the presence of transition metal ions like Cu2+, one of the strongest urease inhibitors. The low costs and environmental compatibility make CeO2-x NRs a green urease substitute that may be applied in polymer membranes for water processing or filters for the waste water reclamation. The biomimicry approach allows the application of CeO2-x NRs as functional enzyme mimics where the use of native or recombinant enzyme is hampered because of its costs or operational stability.
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Affiliation(s)
- K Korschelt
- Institut für Anorganische Chemie und Analytische Chemie, Johannes Gutenberg-Universität, Duesbergweg 10-14, D-55128 Mainz, Germany.
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24
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Alatawi FS, Monier M, Elsayed NH. Amino functionalization of carboxymethyl cellulose for efficient immobilization of urease. Int J Biol Macromol 2018; 114:1018-1025. [DOI: 10.1016/j.ijbiomac.2018.03.142] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 03/14/2018] [Accepted: 03/22/2018] [Indexed: 11/26/2022]
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25
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Jing ZW, Luo M, Jia YY, Li C, Zhou SY, Mei QB, Zhang BL. Anti-Helicobacterpylori effectiveness and targeted delivery performance of amoxicillin-UCCs-2/TPP nanoparticles based on ureido-modified chitosan derivative. Int J Biol Macromol 2018; 115:367-374. [PMID: 29660462 DOI: 10.1016/j.ijbiomac.2018.04.070] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 04/11/2018] [Accepted: 04/12/2018] [Indexed: 02/07/2023]
Abstract
The amoxicillin-UCCs-2/TPP nanoparticles constructed with ureido-modified chitosan derivative UCCs-2 and sodium tripolyphosphate (TPP) played an important role to deliver drug to achieve more efficacious and specific eradication of Helicobacterpylori (H. pylori) in vitro. In this study, the anti-H. pylori effectiveness in vivo and uptake mechanism was investigated in details, including the effect of temperature, pH values and the addition of competitive substrate urea on uptake. Compared with unmodified nanoparticles, a more efficacious and specific anti-H. pylori activities were obtained in vivo by using this biological chitosan derivative UCCs-2. Histological staining and immunological analysis verified that the amoxicillin-UCCs-2/TPP nanoparticles could diminish the proinflammatory cytokines levels and alleviate the inflammatory damages caused by H. pylori infection. The uredio-modified nanoparticles also have favorable gastric retention property, which is beneficial for the oral drug delivery to targeted eradicate H. pylori infection in stomach. These findings suggest that this targeted drug delivery system may serve for specific treatment of H. pylori infection both in vitro and in vivo, which can also be used as promising nanocarriers for other therapeutic reagents to target H. pylori.
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Affiliation(s)
- Zi-Wei Jing
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China; The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Min Luo
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Yi-Yang Jia
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Chen Li
- Key Laboratory of Gastrointestinal Pharmacology of the State Administration of Traditional Chinese Medicine, Fourth Military Medical University, Xi'an 710032, China
| | - Si-Yuan Zhou
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China; Key Laboratory of Gastrointestinal Pharmacology of the State Administration of Traditional Chinese Medicine, Fourth Military Medical University, Xi'an 710032, China
| | - Qi-Bing Mei
- Key Laboratory of Gastrointestinal Pharmacology of the State Administration of Traditional Chinese Medicine, Fourth Military Medical University, Xi'an 710032, China
| | - Bang-Le Zhang
- Department of Pharmaceutics, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China; Key Laboratory of Gastrointestinal Pharmacology of the State Administration of Traditional Chinese Medicine, Fourth Military Medical University, Xi'an 710032, China.
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26
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Wlodarczyk D, Méricq JP, Soussan L, Bouyer D, Faur C. Enzymatic gelation to prepare chitosan gels: Study of gelation kinetics and identification of limiting parameters for controlled gel morphology. Int J Biol Macromol 2018; 107:1175-1183. [DOI: 10.1016/j.ijbiomac.2017.09.097] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 09/14/2017] [Accepted: 09/23/2017] [Indexed: 11/30/2022]
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27
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Kinetics of the urea–urease clock reaction with urease immobilized in hydrogel beads. REACTION KINETICS MECHANISMS AND CATALYSIS 2017. [DOI: 10.1007/s11144-017-1296-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Krajewska B. Urease-aided calcium carbonate mineralization for engineering applications: A review. J Adv Res 2017; 13:59-67. [PMID: 30094083 PMCID: PMC6077181 DOI: 10.1016/j.jare.2017.10.009] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 10/23/2017] [Accepted: 10/26/2017] [Indexed: 12/21/2022] Open
Abstract
Inducing calcium carbonate precipitation is another important function of urease in nature. The process takes advantage of the supply of carbonate ions derived from urea hydrolysis and of an increase in pH generated by the reaction, effects that in the presence of Ca2+ ions lead to the precipitation of CaCO3. Further to its importance in nature, if performed in a biomimetic manner, the urease-aided CaCO3 mineralization offers enormous potential in innovative engineering applications as an eco-friendly technique operative under mild conditions, to be used for remediation and cementation/deposition in field applications in situ. These include among others, the strengthening and consolidation of soil/sand, the protection and restoration of stone and concrete structures, conservation of stone cultural heritage materials, cleaning waste- and groundwater of toxic metals and radionuclides, and plugging geological formations for the enhancement of oil recovery and geologic CO2 sequestration. In view of the potential of this newly emerging interdisciplinary branch of engineering, this article presents the principles of urease-aided calcium carbonate mineralization apposed to other biomineralization processes, and reviews the advantages and limitations of the technique compared to the conventional techniques presently in use. Further, it presents areas of its existing and potential applications, notably in geotechnical, construction and environmental engineering, and its future perspectives.
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29
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Design, synthesis, in vitro Evaluation and docking studies on dihydropyrimidine-based urease inhibitors. Bioorg Chem 2017; 74:53-65. [DOI: 10.1016/j.bioorg.2017.07.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 07/11/2017] [Accepted: 07/11/2017] [Indexed: 12/28/2022]
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30
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Pogorilyi RP, Pylypchuk I, Melnyk IV, Zub YL, Seisenbaeva GA, Kessler VG. Sol-Gel Derived Adsorbents with Enzymatic and Complexonate Functions for Complex Water Remediation. NANOMATERIALS (BASEL, SWITZERLAND) 2017; 7:E298. [PMID: 28956812 PMCID: PMC5666463 DOI: 10.3390/nano7100298] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 09/18/2017] [Accepted: 09/19/2017] [Indexed: 11/16/2022]
Abstract
Sol-gel technology is a versatile tool for preparation of complex silica-based materials with targeting functions for use as adsorbents in water purification. Most efficient removal of organic pollutants is achieved by using enzymatic reagents grafted on nano-carriers. However, enzymes are easily deactivated in the presence of heavy metal cations. In this work, we avoided inactivation of immobilized urease by Cu (II) and Cd (II) ions using magnetic nanoparticles provided with additional complexonate (diethylene triamine pentaacetic acid or DTPA) functions. Obtained nanomaterials were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). According to TGA, the obtained Fe₃O₄/SiO₂-NH₂-DTPA nanoadsorbents contained up to 0.401 mmol/g of DTPA groups. In the concentration range Ceq = 0-50 mmol/L, maximum adsorption capacities towards Cu (II) and Cd (II) ions were 1.1 mmol/g and 1.7 mmol/g, respectively. Langmuir adsorption model fits experimental data in concentration range Ceq = 0-10 mmol/L. The adsorption mechanisms have been evaluated for both of cations. Crosslinking of 5 wt % of immobilized urease with glutaraldehyde prevented the loss of the enzyme in repeated use of the adsorbent and improved the stability of the enzymatic function leading to unchanged activity in at least 18 cycles. Crosslinking of 10 wt % urease on the surface of the particles allowed a decrease in urea concentration in 20 mmol/L model solutions to 2 mmol/L in up to 10 consequent decomposition cycles. Due to the presence of DTPA groups, Cu2+ ions in concentration 1 µmol/L did not significantly affect the urease activity. Obtained magnetic Fe₃O₄/SiO₂-NH₂-DTPA-Urease nanocomposite sorbents revealed a high potential for urease decomposition, even in presence of heavy metal ions.
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Affiliation(s)
- Roman P Pogorilyi
- Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 17, General Naumov Street, 03164 Kyiv, Ukraine.
| | - Ievgen Pylypchuk
- Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 17, General Naumov Street, 03164 Kyiv, Ukraine.
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden.
| | - Inna V Melnyk
- Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 17, General Naumov Street, 03164 Kyiv, Ukraine.
| | - Yurii L Zub
- Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 17, General Naumov Street, 03164 Kyiv, Ukraine.
| | - Gulaim A Seisenbaeva
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden.
| | - Vadim G Kessler
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden.
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31
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Chen XF, Wang CF, Kong S, Li C, Zhou X, Zhang CY, Sheng GH, Zhu HL. Structure and urease inhibitory activity of copper(II) complex with (E)-3-(2,3-dihydrobenzo[b][1,4]dioxin-6-yl)acrylic acid. J STRUCT CHEM+ 2017. [DOI: 10.1134/s0022476617040229] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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32
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Li W, Li Y, Yang Z, Xu C. pH Control in a Urease-catalyzed Reaction Using Weak-base Beads as Polymer-supported Buffer Agents. CHEM LETT 2016. [DOI: 10.1246/cl.160462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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33
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Cerreti M, Fidaleo M, Benucci I, Liburdi K, Tamborra P, Moresi M. Assessing the Potential Content of Ethyl Carbamate in White, Red, and Rosé Wines as a Key Factor for Pursuing Urea Degradation by Purified Acid Urease. J Food Sci 2016; 81:C1603-12. [PMID: 27239804 DOI: 10.1111/1750-3841.13344] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 04/01/2016] [Accepted: 04/20/2016] [Indexed: 11/29/2022]
Abstract
The ethyl carbamate (EC) content of a wine after a given temperature-time storage was theoretically predicted from the potential concentration of ethyl carbamate (PEC), as determined via an accelerated EC formation test. Such information was used to decide whether an enzymatic treatment was needed to reduce the wine urea level before bottling/aging. To this end, 6 white, red, and rosé wines, manufactured in Italy as such or enriched with urea, were tested for their PEC content either before or after enzymatic treatment using a purified acid urease preparation derived from Lactobacillus fermentum. The treatment was severely affected by the total phenolic content (TP) of the wine, the estimated pseudo-first-order kinetic rate constant for NH3 formation reducing by a factor of approximately 2000 as the TP increased from 0 to 1.64 g L(-1) . Such a sensitivity to TP was by far greater than that pertaining to a killed cell-based enzyme preparation used previously. Urea hydrolysis was successful at reducing EC concentration in wines with low levels of TP and other EC precursors.
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Affiliation(s)
- Martina Cerreti
- Dept. for Innovation in Biological, Agro-Food, and Forest Systems, Univ. of Tuscia, Via S. C. de Lellis, 01100, Viterbo, Italy
| | - Marcello Fidaleo
- Dept. for Innovation in Biological, Agro-Food, and Forest Systems, Univ. of Tuscia, Via S. C. de Lellis, 01100, Viterbo, Italy
| | - Ilaria Benucci
- Dept. for Innovation in Biological, Agro-Food, and Forest Systems, Univ. of Tuscia, Via S. C. de Lellis, 01100, Viterbo, Italy
| | - Katia Liburdi
- Dept. for Innovation in Biological, Agro-Food, and Forest Systems, Univ. of Tuscia, Via S. C. de Lellis, 01100, Viterbo, Italy
| | - Pasquale Tamborra
- CRA - Experimental Institute of Enology, SOP Barletta, Via Vittorio Veneto 26, 70051, Barletta, Italy
| | - Mauro Moresi
- Dept. for Innovation in Biological, Agro-Food, and Forest Systems, Univ. of Tuscia, Via S. C. de Lellis, 01100, Viterbo, Italy
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Hsu CH, Hsu YW, Weng YC. A novel potentiometric sensor based on urease/ bovine serum albumin-poly(3,4-ethylenedioxythiophene)/Pt for urea detection. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2016. [DOI: 10.1515/znb-2015-0166] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractWe have presented a potentiometric urea sensor using an urease/bovine serum albumin (BSA)-poly(3,4-ethylenedioxythiophene)(PEDOT)/Pt electrode. A urea detection sensitivity of 15.2 mV/decade (order of magnitude) has been achieved. BSA trapped in the PEDOT matrix was employed to bond urease molecules on the surface of a BSA-PEDOT/Pt electrode via amide bonds formed between the carboxyl functional groups on the enzyme and the amines on the BSA. The effects of PEDOT thickness, pH value of the urea solution, urease concentration, and temperature on the urea detection sensitivity were also studied. The lifetime of the sensor was studied for a period of 10 weeks, and the average sensing degradation rate was about 9 % per week. This sensor displayed a high selectivity to urea over glucose, KCl, and NaCl.
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Affiliation(s)
- Chien-Hsing Hsu
- Department of Chemical Engineering, Feng Chia University, Taichung 40724, Taiwan
| | - Ya-Wei Hsu
- Department of Chemical Engineering, Feng Chia University, Taichung 40724, Taiwan
| | - Yu-Ching Weng
- Department of Chemical Engineering, Feng Chia University, Taichung 40724, Taiwan
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35
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A combined temperature-pH study of urease kinetics. Assigning pKa values to ionizable groups of the active site involved in the catalytic reaction. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2015.11.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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36
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Kumari D, Qian XY, Pan X, Achal V, Li Q, Gadd GM. Microbially-induced Carbonate Precipitation for Immobilization of Toxic Metals. ADVANCES IN APPLIED MICROBIOLOGY 2016; 94:79-108. [PMID: 26917242 DOI: 10.1016/bs.aambs.2015.12.002] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Rapid urbanization and industrialization resulting from growing populations contribute to environmental pollution by toxic metals and radionuclides which pose a threat to the environment and to human health. To combat this threat, it is important to develop remediation technologies based on natural processes that are sustainable. In recent years, a biomineralization process involving ureolytic microorganisms that leads to calcium carbonate precipitation has been found to be effective in immobilizing toxic metal pollutants. The advantage of using ureolytic organisms for bioremediating metal pollution in soil is their ability to immobilize toxic metals efficiently by precipitation or coprecipitation, independent of metal valence state and toxicity and the redox potential. This review summarizes current understanding of the ability of ureolytic microorganisms for carbonate biomineralization and applications of this process for toxic metal bioremediation. Microbial metal carbonate precipitation may also be relevant to detoxification of contaminated process streams and effluents as well as the production of novel carbonate biominerals and biorecovery of metals and radionuclides that form insoluble carbonates.
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Affiliation(s)
- Deepika Kumari
- Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
| | - Xin-Yi Qian
- Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
| | - Xiangliang Pan
- Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
| | - Varenyam Achal
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China
| | - Qianwei Li
- Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee, Scotland, UK
| | - Geoffrey Michael Gadd
- Xinjiang Key Laboratory of Environmental Pollution and Bioremediation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China; Geomicrobiology Group, School of Life Sciences, University of Dundee, Dundee, Scotland, UK
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Liang K, Coghlan CJ, Bell SG, Doonan C, Falcaro P. Enzyme encapsulation in zeolitic imidazolate frameworks: a comparison between controlled co-precipitation and biomimetic mineralisation. Chem Commun (Camb) 2016; 52:473-6. [DOI: 10.1039/c5cc07577g] [Citation(s) in RCA: 192] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Recent studies have demonstrated that metal–organic frameworks can be employed as protective coatings for enzymes.
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Affiliation(s)
- Kang Liang
- CSIRO Manufacturing Flagship
- Clayton South
- Australia
| | | | - Stephen G. Bell
- School of Chemistry and Physics
- The University of Adelaide
- Adelaide
- Australia
| | - Christian Doonan
- School of Chemistry and Physics
- The University of Adelaide
- Adelaide
- Australia
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38
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Carlini CR, Ligabue-Braun R. Ureases as multifunctional toxic proteins: A review. Toxicon 2015; 110:90-109. [PMID: 26690979 DOI: 10.1016/j.toxicon.2015.11.020] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Revised: 11/09/2015] [Accepted: 11/26/2015] [Indexed: 12/21/2022]
Abstract
Ureases are metalloenzymes that hydrolyze urea into ammonia and carbon dioxide. They were the first enzymes to be crystallized and, with them, the notion that enzymes are proteins became accepted. Novel toxic properties of ureases that are independent of their enzyme activity have been discovered in the last three decades. Since our first description of the neurotoxic properties of canatoxin, an isoform of the jack bean urease, which appeared in Toxicon in 1981, about one hundred articles have been published on "new" properties of plant and microbial ureases. Here we review the present knowledge on the non-enzymatic properties of ureases. Plant ureases and microbial ureases are fungitoxic to filamentous fungi and yeasts by a mechanism involving fungal membrane permeabilization. Plant and at least some bacterial ureases have potent insecticidal effects. This entomotoxicity relies partly on an internal peptide released upon proteolysis of ingested urease by insect digestive enzymes. The intact protein and its derived peptide(s) are neurotoxic to insects and affect a number of other physiological functions, such as diuresis, muscle contraction and immunity. In mammal models some ureases are acutely neurotoxic upon injection, at least partially by enzyme-independent effects. For a long time bacterial ureases have been recognized as important virulence factors of diseases by urease-producing microorganisms. Ureases activate exocytosis in different mammalian cells recruiting eicosanoids and Ca(2+)-dependent pathways, even when their ureolytic activity is blocked by an irreversible inhibitor. Ureases are chemotactic factors recognized by neutrophils (and some bacteria), activating them and also platelets into a pro-inflammatory "status". Secretion-induction by ureases may play a role in fungal and bacterial diseases in humans and other animals. The now recognized "moonlighting" properties of these proteins have renewed interest in ureases for their biotechnological potential to improve plant defense against pests and as potential targets to ameliorate diseases due to pathogenic urease-producing microorganisms.
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Affiliation(s)
- Celia R Carlini
- Brain Institute (Instituto do Cérebro-INSCER), Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, RS, Brazil; Center of Biotechnology, Universidade Federal do Rio Grande do Sul Porto Alegre, RS, Brazil.
| | - Rodrigo Ligabue-Braun
- Center of Biotechnology, Universidade Federal do Rio Grande do Sul Porto Alegre, RS, Brazil
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Zhang Q, Zha X, Zhou N, Tian Y. Preparation of crosslinked enzyme aggregates (CLEAs) of acid urease with urethanase activity and their application. J Basic Microbiol 2015; 56:422-31. [DOI: 10.1002/jobm.201500498] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 11/11/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Qian Zhang
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology; Jiangnan University; Wuxi 214122 China
| | - Xiaohong Zha
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology; Jiangnan University; Wuxi 214122 China
| | - Nandi Zhou
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology; Jiangnan University; Wuxi 214122 China
| | - Yaping Tian
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology; Jiangnan University; Wuxi 214122 China
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40
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Walker D, Käsdorf BT, Jeong HH, Lieleg O, Fischer P. Enzymatically active biomimetic micropropellers for the penetration of mucin gels. SCIENCE ADVANCES 2015; 1:e1500501. [PMID: 26824056 PMCID: PMC4730841 DOI: 10.1126/sciadv.1500501] [Citation(s) in RCA: 169] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 09/25/2015] [Indexed: 05/18/2023]
Abstract
In the body, mucus provides an important defense mechanism by limiting the penetration of pathogens. It is therefore also a major obstacle for the efficient delivery of particle-based drug carriers. The acidic stomach lining in particular is difficult to overcome because mucin glycoproteins form viscoelastic gels under acidic conditions. The bacterium Helicobacter pylori has developed a strategy to overcome the mucus barrier by producing the enzyme urease, which locally raises the pH and consequently liquefies the mucus. This allows the bacteria to swim through mucus and to reach the epithelial surface. We present an artificial system of reactive magnetic micropropellers that mimic this strategy to move through gastric mucin gels by making use of surface-immobilized urease. The results demonstrate the validity of this biomimetic approach to penetrate biological gels, and show that externally propelled microstructures can actively and reversibly manipulate the physical state of their surroundings, suggesting that such particles could potentially penetrate native mucus.
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Affiliation(s)
- Debora Walker
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany
- Institute for Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Benjamin T. Käsdorf
- Institute for Medical Engineering and Department of Mechanical Engineering, Technische Universität München, Boltzmannstrasse 11, 85748 Garching, Germany
| | - Hyeon-Ho Jeong
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany
| | - Oliver Lieleg
- Institute for Medical Engineering and Department of Mechanical Engineering, Technische Universität München, Boltzmannstrasse 11, 85748 Garching, Germany
| | - Peer Fischer
- Max Planck Institute for Intelligent Systems, Heisenbergstrasse 3, 70569 Stuttgart, Germany
- Institute for Physical Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
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41
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Muzika F, Bánsági T, Schreiber I, Schreiberová L, Taylor AF. A bistable switch in pH in urease-loaded alginate beads. Chem Commun (Camb) 2015; 50:11107-9. [PMID: 25111059 DOI: 10.1039/c4cc03936j] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bistable switch from a low pH (unreacted "off") state to a high pH (reacted "on") state was obtained in enzyme-loaded gel beads in response to supra-threshold substrate concentrations.
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Affiliation(s)
- F Muzika
- Department of Chemical Engineering, Institute of Chemical Technology, Prague, 16628 Prague 6, Czech Republic
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42
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Daneshfar A, Matsuura T, Emadzadeh D, Pahlevani Z, Ismail AF. Urease-carrying electrospun polyacrylonitrile mat for urea hydrolysis. REACT FUNCT POLYM 2015. [DOI: 10.1016/j.reactfunctpolym.2014.12.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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43
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Miksch K, Cema G, Corvini PFX, Felis E, Sochacki A, Surmacz-Górska J, Wiszniowski J, Żabczynski S. R&D priorities in the field of sustainable remediation and purification of agro-industrial and municipal wastewater. N Biotechnol 2015; 32:128-32. [DOI: 10.1016/j.nbt.2013.11.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 11/11/2013] [Accepted: 11/15/2013] [Indexed: 11/15/2022]
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44
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Effect of Cultivation Time and Medium Condition in Production of Bacterial Cellulose Nanofiber for Urease Immobilization. INT J POLYM SCI 2015. [DOI: 10.1155/2015/270501] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A new nanoporous biomatrix originated from bacterial resources has been chosen for urease immobilization. Urease has been immobilized on synthesized bacterial cellulose nanofiber since this enzyme has a key role in nitrogen metabolism.Gluconacetobacter xylinumATCC 10245 has been cultivated for synthesis of a nanofiber with the diameter of 30–70 nm. Different cultivation processes in the aspect of time and cultivation medium conditions were chosen to study the performance of immobilized enzyme on four types of bacterial cellulose nanofibers (BCNs). Urease immobilization into the nanofiber has been done in two steps: enzyme adsorption and glutaraldehyde cross-linking. The results showed that the immobilized enzymes were relatively active and highly stable compared to the control samples of free enzymes. Optimum pH was obtained 6.5 and 7 for different synthesized BCNs, while the optimum temperature for immobilized urease was 50°C. Finding of the current experiment illustrated that the immobilized enzyme in optimum condition lost its initial activity by 41% after 15 weeks.
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45
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46
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Bortone N, Fidaleo M, Moresi M. Internal and external mass transfer limitations on the activity of immobilised acid urease derivatives differing in enzyme loading. Biochem Eng J 2014. [DOI: 10.1016/j.bej.2013.10.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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47
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Pogorilyi RP, Melnyk IV, Zub YL, Seisenbaeva GA, Kessler VG. Immobilization of urease on magnetic nanoparticles coated by polysiloxane layers bearing thiol- or thiol- and alkyl-functions. J Mater Chem B 2014; 2:2694-2702. [DOI: 10.1039/c4tb00018h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
An optimized strategy for production of a highly active magnetic formulation of urease has been elaborated via systematic studies of the enzyme immobilization on magnetite nanoparticles coated by functional siloxane layers.
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Affiliation(s)
- R. P. Pogorilyi
- Chuiko Institute of Surface Chemistry
- National Academy of Sciences of Ukraine
- Kyiv 03164, Ukraine
| | - I. V. Melnyk
- Chuiko Institute of Surface Chemistry
- National Academy of Sciences of Ukraine
- Kyiv 03164, Ukraine
| | - Y. L. Zub
- Chuiko Institute of Surface Chemistry
- National Academy of Sciences of Ukraine
- Kyiv 03164, Ukraine
| | - G. A. Seisenbaeva
- Department of Chemistry
- Swedish University of Agricultural Sciences
- 750 07 Uppsala, Sweden
| | - V. G. Kessler
- Department of Chemistry
- Swedish University of Agricultural Sciences
- 750 07 Uppsala, Sweden
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48
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Onal Okyay T, Frigi Rodrigues D. High throughput colorimetric assay for rapid urease activity quantification. J Microbiol Methods 2013; 95:324-6. [PMID: 24103728 DOI: 10.1016/j.mimet.2013.09.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 09/24/2013] [Accepted: 09/24/2013] [Indexed: 11/16/2022]
Abstract
A novel high throughput colorimetric urease activity assay was compared to the Nessler method. The new method employs phenol red to determine the urease activity. This method reduces significantly sample processing time and allows real-time investigations. This method is rapid, sensitive, easy, cost-effective, and does not use any toxic chemical reagents.
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Affiliation(s)
- Tugba Onal Okyay
- Department of Civil and Environmental Engineering, University of Houston, Houston, TX, 77004, USA
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49
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Reversible Immobilization of Urease by Using Bacterial Cellulose Nanofibers. Appl Biochem Biotechnol 2013; 171:2285-94. [DOI: 10.1007/s12010-013-0541-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 09/15/2013] [Indexed: 10/26/2022]
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50
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