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Scheibel DM, Gitsov IPI, Gitsov I. Enzymes in "Green" Synthetic Chemistry: Laccase and Lipase. Molecules 2024; 29:989. [PMID: 38474502 DOI: 10.3390/molecules29050989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/14/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024] Open
Abstract
Enzymes play an important role in numerous natural processes and are increasingly being utilized as environmentally friendly substitutes and alternatives to many common catalysts. Their essential advantages are high catalytic efficiency, substrate specificity, minimal formation of byproducts, and low energy demand. All of these benefits make enzymes highly desirable targets of academic research and industrial development. This review has the modest aim of briefly overviewing the classification, mechanism of action, basic kinetics and reaction condition effects that are common across all six enzyme classes. Special attention is devoted to immobilization strategies as the main tools to improve the resistance to environmental stress factors (temperature, pH and solvents) and prolong the catalytic lifecycle of these biocatalysts. The advantages and drawbacks of methods such as macromolecular crosslinking, solid scaffold carriers, entrapment, and surface modification (covalent and physical) are discussed and illustrated using numerous examples. Among the hundreds and possibly thousands of known and recently discovered enzymes, hydrolases and oxidoreductases are distinguished by their relative availability, stability, and wide use in synthetic applications, which include pharmaceutics, food and beverage treatments, environmental clean-up, and polymerizations. Two representatives of those groups-laccase (an oxidoreductase) and lipase (a hydrolase)-are discussed at length, including their structure, catalytic mechanism, and diverse usage. Objective representation of the current status and emerging trends are provided in the main conclusions.
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Affiliation(s)
- Dieter M Scheibel
- Department of Chemistry, State University of New York-ESF, Syracuse, NY 13210, USA
| | - Ioan Pavel Ivanov Gitsov
- Science and Technology, Medtronic Incorporated, 710 Medtronic Parkway, Minneapolis, MN 55432, USA
| | - Ivan Gitsov
- Department of Chemistry, State University of New York-ESF, Syracuse, NY 13210, USA
- The Michael M. Szwarc Polymer Research Institute, Syracuse, NY 13210, USA
- Biomedical and Chemical Engineering Department, Syracuse University, Syracuse, NY 13210, USA
- BioInspired Institute, Syracuse, NY 13210, USA
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2
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Hauptstein N, Pouyan P, Wittwer K, Cinar G, Scherf-Clavel O, Raschig M, Licha K, Lühmann T, Nischang I, Schubert US, Pfaller CK, Haag R, Meinel L. Polymer selection impacts the pharmaceutical profile of site-specifically conjugated Interferon-α2a. J Control Release 2022; 348:881-892. [PMID: 35764249 DOI: 10.1016/j.jconrel.2022.05.060] [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: 02/01/2022] [Revised: 04/12/2022] [Accepted: 05/15/2022] [Indexed: 12/15/2022]
Abstract
Conjugation of poly(ethylene glycol) (PEG) to biologics is a successful strategy to favorably impact the pharmacokinetics and efficacy of the resulting bioconjugate. We compare bioconjugates synthesized by strain-promoted azide-alkyne cycloaddition (SPAAC) using PEG and linear polyglycerol (LPG) of about 20 kDa or 40 kDa, respectively, with an azido functionalized human Interferon-α2a (IFN-α2a) mutant. Site-specific PEGylation and LPGylation resulted in IFN-α2a bioconjugates with improved in vitro potency compared to commercial Pegasys. LPGylated bioconjugates had faster disposition kinetics despite comparable hydrodynamic radii to their PEGylated analogues. Overall exposure of the PEGylated IFN-α2a with a 40 kDa polymer exceeded Pegasys, which, in return, was similar to the 40 kDa LPGylated conjugates. The study points to an expanded polymer design space through which the selected polymer class may result in a different distribution of the studied bioconjugates.
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Affiliation(s)
- Niklas Hauptstein
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Paria Pouyan
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
| | - Kevin Wittwer
- Paul-Ehrlich-Institute, Division of Veterinary Medicine, Paul-Ehrlich-Str. 51-59, 63225 Langen, Germany
| | - Gizem Cinar
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Oliver Scherf-Clavel
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Martina Raschig
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Kai Licha
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
| | - Tessa Lühmann
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Ivo Nischang
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Christian K Pfaller
- Paul-Ehrlich-Institute, Division of Veterinary Medicine, Paul-Ehrlich-Str. 51-59, 63225 Langen, Germany
| | - Rainer Haag
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Takustr. 3, 14195 Berlin, Germany
| | - Lorenz Meinel
- Institute of Pharmacy and Food Chemistry, University of Würzburg, Am Hubland, 97074 Würzburg, Germany; Helmholtz Institute for RNA-Based Infection Research (HIRI), 97080 Würzburg, Germany.
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Martins PA, Trobo-Maseda L, Lima FA, de Morais Júnior WG, De Marco JL, Salum TFC, Guisán JM. Omega-3 production by fish oil hydrolysis using a lipase from Burkholderia gladioli BRM58833 immobilized and stabilized by post-immobilization techniques. Biochem Biophys Rep 2022; 29:101193. [PMID: 35128079 PMCID: PMC8808055 DOI: 10.1016/j.bbrep.2021.101193] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 11/06/2022] Open
Abstract
Immobilization of lipase from Burkholderia gladioli BRM58833 on octyl sepharose (OCT) resulted in catalysts with higher activity and stability. Following, strategies were studied to further stabilize and secure the enzyme to the support using functionalized polymers, like polyethylenimine (PEI) and aldehyde-dextran (DEXa), to cover the catalyst with layers at different combinations. Alternatively, the construction of a bifunctional layer was studied using methoxypolyethylene glycol amine (NH 2 -PEG) and glycine. The catalyst OCT-PEI-DEXa was the most thermostable, with a 263.8-fold increase in stability when compared to the control condition. When evaluated under alkaline conditions, OCT-DEXa-PEG 10 /Gly was the most stable, reaching stability 70.1 times greater than the control condition. Proportionally, the stabilization obtained for B. gladioli BRM58833 lipase was superior to that obtained for the commercial B. cepacia lipase. Preliminary results in the hydrolysis of fish oil demonstrated the potential of the coating technique with bifunctional polymers, resulting in a stable catalyst with greater catalytic capacity for the production of omega-3 PUFAs. According to the results obtained, it is possible to modulate B. gladioli BRM58833 lipase properties like stability and catalytic activity for enrichment of omega-3 fatty acids.
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Affiliation(s)
- Pedro Alves Martins
- Embrapa Agroenergia, Parque Estação Biológica, PqEB s/no, W3 Norte (final), 70770-901, Brasília, DF, Brazil
- Universidade de Brasília, Campus Universitário Darcy Ribeiro, 70910-900, Brasília, DF, Brazil
- Departamento de Biocatálisis, Instituto de Catálisis y Petroleoquímica – CSIC, C/ Marie Curie 2, Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - Lara Trobo-Maseda
- Departamento de Biocatálisis, Instituto de Catálisis y Petroleoquímica – CSIC, C/ Marie Curie 2, Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - Frederico Alves Lima
- Departamento de Biocatálisis, Instituto de Catálisis y Petroleoquímica – CSIC, C/ Marie Curie 2, Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - Wilson Galvão de Morais Júnior
- Departamento de Biocatálisis, Instituto de Catálisis y Petroleoquímica – CSIC, C/ Marie Curie 2, Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - Janice Lisboa De Marco
- Universidade de Brasília, Campus Universitário Darcy Ribeiro, 70910-900, Brasília, DF, Brazil
| | - Thaís Fabiana Chan Salum
- Embrapa Agroenergia, Parque Estação Biológica, PqEB s/no, W3 Norte (final), 70770-901, Brasília, DF, Brazil
| | - José Manuel Guisán
- Departamento de Biocatálisis, Instituto de Catálisis y Petroleoquímica – CSIC, C/ Marie Curie 2, Campus UAM, Cantoblanco, 28049, Madrid, Spain
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Karamitros CS, Somody CM, Agnello G, Rowlinson S. Engineering of the Recombinant Expression and PEGylation Efficiency of the Therapeutic Enzyme Human Thymidine Phosphorylase. Front Bioeng Biotechnol 2021; 9:793985. [PMID: 34976980 PMCID: PMC8718881 DOI: 10.3389/fbioe.2021.793985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Accepted: 11/12/2021] [Indexed: 12/01/2022] Open
Abstract
Human thymidine phosphorylase (HsTP) is an enzyme with important implications in the field of rare metabolic diseases. Defective mutations of HsTP lead to mitochondrial neurogastrointestinal encephalomyopathy (MNGIE), a disease with a high unmet medical need that is associated with severe neurological and gastrointestinal complications. Current efforts focus on the development of an enzyme replacement therapy (ERT) using the Escherichia coli ortholog (EcTP). However, bacterial enzymes are counter-indicated for human therapeutic applications because they are recognized as foreign by the human immune system, thereby eliciting adverse immune responses and raising significant safety and efficacy risks. Thus, it is critical to utilize the HsTP enzyme as starting scaffold for pre-clinical drug development, thus de-risking the safety concerns associated with the use of bacterial enzymes. However, HsTP expresses very poorly in E. coli, whereas its PEGylation, a crucial chemical modification for achieving long serum persistence of therapeutic enzymes, is highly inefficient and negatively affects its catalytic activity. Here we focused on the engineering of the recombinant expression profile of HsTP in E. coli cells, as well as on the optimization of its PEGylation efficiency aiming at the development of an alternative therapeutic approach for MNGIE. We show that phylogenetic and structural analysis of proteins can provide important insights for the rational design of N’-terminus-truncation constructs which exhibit significantly improved recombinant expression levels. In addition, we developed and implemented a criteria-driven rational surface engineering strategy for the substitution of arginine-to-lysine and lysine-to-arginine residues to achieve more efficient, homogeneous and reproducible PEGylation without negatively affecting the enzymatic catalytic activity upon PEGylation. Collectively, our proposed strategies provide an effective way to optimize enzyme PEGylation and E. coli recombinant expression and are likely applicable for other proteins and enzymes.
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Massad N, Banta SA. NAD(H)-PEG Swing Arms Improve Both the Activities and Stabilities of Modularly-Assembled Transhydrogenases Designed with Predictable Selectivities. Chembiochem 2021; 23:e202100251. [PMID: 34351671 DOI: 10.1002/cbic.202100251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/04/2021] [Indexed: 11/11/2022]
Abstract
Protein engineering has been used to enhance the activities, selectivities, and stabilities of enzymes. Frequently tradeoffs are observed, where improvements in some features can come at the expense of others. Nature uses modular assembly of active sites for complex, multi-step reactions, and natural "swing arm" mechanisms have evolved to transfer intermediates between active sites. Biomimetic polyethylene glycol (PEG) swing arms modified with NAD(H) have been explored to introduce synthetic swing arms into fused oxidoreductases. Here we report that increasing NAD(H)-PEG swing arms can improve the activity of synthetic formate:malate oxidoreductases as well as the thermal and operational stabilities of the biocatalysts. The modular assembly approach enables the K M values of new enzymes to be predictable, based on the parental enzymes. We describe four unique synthetic transhydrogenases that have no native homologs, and this platform could be easily extended for the predictive design of additional synthetic cofactor-independent transhydrogenases.
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Affiliation(s)
- Nadim Massad
- Columbia University, Chemical Engineering, UNITED STATES
| | - Scott A Banta
- Columbia University, Department of Chemical Engineering, 820 Mudd MC4721, 500 West 120th Street, 10027, New York, UNITED STATES
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Sunil V, Mozhi A, Zhan W, Teoh JH, Wang CH. Convection enhanced delivery of light responsive antigen capturing oxygen generators for chemo-phototherapy triggered adaptive immunity. Biomaterials 2021; 275:120974. [PMID: 34166911 DOI: 10.1016/j.biomaterials.2021.120974] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 05/20/2021] [Accepted: 06/11/2021] [Indexed: 12/13/2022]
Abstract
In recent years, combination therapy has emerged as the cornerstone of clinical practice in treating glioblastoma multiforme. However, their ability to trigger and leverage the body's adaptive immunity has rarely been studied. Tumour heterogeneity, the presence of the blood-brain barrier, and an immunosuppressive tumor microenvironment play a crucial role in the 90% local tumor recurrence post-treatment. Herein, we report an improved combination therapy approach capable of stimulating an immune response that utilizes Light responsive antigen-capturing oxygen generators (LAGs). The engineered LAGs loaded with a non-genotoxic molecule, Nutlin-3a, and a photosensitizer, Protoporphyrin IX, can release the payload on-demand when exposed to light of a specific wavelength. The in-situ oxygen generation capability of LAGs enables tumor oxygenation enhancement, thereby alleviating the tumor hypoxia and enhancing the efficacy of chemo-photodynamic therapy. Furthermore, by modulating the surface properties of LAGs, we demonstrated that the tumor-derived protein antigens released can be captured and retained in-situ, which improves antigen uptake and presentation by the antigen-presenting cells. Dual drug-loaded LAGs (DD-LAGs) upregulated the expression of cell surface CD83 maturation and CD86 costimulatory markers on monocyte-derived-dendritic cells, suggesting intrinsic immune adjuvancy. In the presence of 3D printed hypoxic U87 spheroids (h-U87), DD-LAGs induced cancer cell death, upregulated IL-1β, and downregulated IL-10 resulting in CD3+, helper CD4+, and cytotoxic CD8+ proliferation. Finally, we have investigated convection-enhanced delivery as a potential route of administration for DD-LAGs. Our work presents a novel strategy to induce tumor cell death both during and post-treatment, thereby reducing the possibility of recurrence.
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Affiliation(s)
- Vishnu Sunil
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Anbu Mozhi
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Wenbo Zhan
- School of Engineering, King's College, University of Aberdeen, Aberdeen, AB24 3UE, UK
| | - Jia Heng Teoh
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Chi-Hwa Wang
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore.
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Hutchins DA, Noh J, Kenealey JD. Activity, stability, and binding capacity of β-galactosidase immobilized on electrospun nylon-6 fiber membrane. J Dairy Sci 2021; 104:3888-3898. [PMID: 33589258 DOI: 10.3168/jds.2020-19453] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 10/14/2020] [Indexed: 12/12/2022]
Abstract
In this research, we explored various immobilized enzyme support materials, including the novel nylon-6 fiber membrane (NFM), and evaluated the increase in surface area and its effect on enzyme binding potential. We also manipulated incubation and reaction conditions and assessed the subsequent effects on activity and stability of β-galactosidase, with comparisons between various solid support materials and free (dissolved) enzyme. Nylon-6 fiber membranes were created by electrospinning and were compared with other materials as solid supports for enzyme binding. The other materials included polyvinylidene fluoride 5-kDa nanofiltration dairy membranes, nylon-6 pellets, and silica glass beads. Scanning electron microscopy revealed the large surface area of NFM, which correlated with greater enzyme activity compared with the relatively flatter surfaces of the other solid support materials. Enzyme activity was measured spectrophotometrically with the color-changing substrate o-nitrophenyl-β-d-galactopyranoside. Compared with the other solid supports, NFM had greater maximum enzyme binding potential. Across pH conditions ranging from 3.5 to 6.0 (including the optimal pH of 4.0-5.0), enzyme activity was maintained on the membrane-immobilized samples, whereas free enzyme did not maintain activity. Altering the storage temperature (4, 22, and 50°C) affected enzyme stability (i.e., the ability of the enzyme to maintain activity over time) of free and polyvinylidene fluoride membrane samples. However, NFM samples maintained stability across the varying storage temperatures. Increasing the immobilization solution enzyme concentration above the maximum enzyme binding capacity had no significant effect on enzyme stability for membrane-immobilized samples; however, both had lower mean stability than free enzyme by approximately 74%. With further development, β-galactosidase immobilized on NFM or other membranes could be used in continuous processing in the dairy industry for a combination of filtration and lactose hydrolysis-creating products that are reduced in lactose and increased in sweetness, with no requirement for "added sugars" on the nutrition label and no enzyme listed as final product ingredient.
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Affiliation(s)
- D A Hutchins
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, Provo, UT 84602
| | - J Noh
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, Provo, UT 84602
| | - J D Kenealey
- Department of Nutrition, Dietetics, and Food Science, Brigham Young University, Provo, UT 84602.
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Production of new nanobiocatalysts via immobilization of lipase B from C. antarctica on polyurethane nanosupports for application on food and pharmaceutical industries. Int J Biol Macromol 2020; 165:2957-2963. [DOI: 10.1016/j.ijbiomac.2020.10.179] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 09/04/2020] [Accepted: 10/22/2020] [Indexed: 12/18/2022]
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García-García P, Fernandez-Lorente G, Guisan JM. Capture of enzyme aggregates by covalent immobilization on solid supports. Relevant stabilization of enzymes by aggregation. J Biotechnol 2020; 325:138-144. [PMID: 33249106 DOI: 10.1016/j.jbiotec.2020.11.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 10/27/2020] [Accepted: 11/02/2020] [Indexed: 11/24/2022]
Abstract
In this paper, a novel procedure for the immobilization and stabilization of enzymes is proposed: the multipoint covalent attachment of bi-molecular enzyme aggregates. This immobilization protocol allows the "capture" and fixation of the enzyme aggregate on the support surface. In addition to stabilization by multipoint attachment, enzyme aggregation promotes very interesting stabilizing effects. In the presence of low concentrations of polyethylene glycol (30 %) the dimeric amine oxidase from Pisum sativum forms soluble bi-molecular aggregates. Enzyme aggregates were analyzed by Dynamic Light Scattering and by full chemical loading of a mesoporous support (10 % agarose gels activated with glyoxyl groups). The soluble aggregate was immobilized by multipoint attachment on glyoxyl- agarose at pH 8.5 though the four amino termini of the two dimeric molecules (Lys residues are not reactive at this pH). The immobilized aggregated structure cannot undergo any movement (translational or rotational) after multipoint attachment and the aggregate is "fixed" on the support surface even after the removal of PEG. The immobilized aggregate was further incubated at pH 10 in order to allow the Lys residues to react with the glyoxyl groups on the support. Enzyme aggregation has an important effect on enzyme stabilization: the aggregated derivative was 40 fold more stable than a similar derivative of the isolated enzyme and 200 fold more than native enzymes in experiments of thermal inactivation.
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Affiliation(s)
- Paz García-García
- Laboratory of Microbiology and Food Biocatalysis. Institute of Food Science Research (CIAL, CSIC-UAM), Nicolás Cabrera, 9, UAM Campus, Cantoblanco, 28049, Madrid, Spain
| | - Gloria Fernandez-Lorente
- Laboratory of Microbiology and Food Biocatalysis. Institute of Food Science Research (CIAL, CSIC-UAM), Nicolás Cabrera, 9, UAM Campus, Cantoblanco, 28049, Madrid, Spain.
| | - Jose M Guisan
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP, CSIC), Marie Curie, 2, UAM Campus, Cantoblanco, 28049, Madrid, Spain.
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High stabilization of immobilized Rhizomucor miehei lipase by additional coating with hydrophilic crosslinked polymers: Poly-allylamine/Aldehyde–dextran. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.02.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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PEG modification enhances the in vivo stability of bioactive proteins immobilized on magnetic nanoparticles. Biotechnol Lett 2020; 42:1407-1418. [PMID: 32200524 DOI: 10.1007/s10529-020-02867-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 03/14/2020] [Indexed: 12/26/2022]
Abstract
OBJECTIVE To increase the in vivo stability of bioactive proteins via optimized loading methods. RESULTS β-Glucosidase (β-Glu), as a model protein, was immobilized on magnetic nanoparticles(denoted as MNP-β-Glu) by chemical coupling methods and was further modified by poly(ethylene glycol) (PEG) molecules (denoted as MNP-β-Glu-PEG) to increase its stability. The physicochemical properties of the as-prepared nanohybrids, including the particle size, zeta potential, and enzyme activity, were well characterized. The proper MNP/β-Glu feed ratio was important for optimizing the particle size. Analysis of enzyme activity showed that the stability of immobilized β-Glu compared with free β-Glu was lower in deionized water and higher in blood serum at 37 °C. MNP-β-Glu-PEG retained 77.9% of the initial activity within 30 days at 4 °C, whereas the free enzyme retained only 58.2%. Pharmacokinetic studies of Sprague-Dawley (SD) rats showed that the MNP-β-Glu-PEG group retained a higher enzyme activity in vivo (41.46% after 50 min) than the MNP-β-Glu group (0.03% after 50 min) and the β-Glu group (0.37% after 50 min). Moreover, in contrast to the MNP-β-Glu group, the enzyme activity was not fully synchronous with the decrease in the Fe concentration in the MNP-β-Glu-PEG group. CONCLUSIONS All findings indicated that the method of immobilization on magnetic nanoparticles and PEG modification is promising for the application of bioactive proteins in vivo.
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Abreu Silveira E, Moreno-Perez S, Basso A, Serban S, Pestana-Mamede R, Tardioli PW, Farinas CS, Castejon N, Fernandez-Lorente G, Rocha-Martin J, Guisan JM. Biocatalyst engineering of Thermomyces Lanuginosus lipase adsorbed on hydrophobic supports: Modulation of enzyme properties for ethanolysis of oil in solvent-free systems. J Biotechnol 2019; 289:126-134. [DOI: 10.1016/j.jbiotec.2018.11.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 11/14/2018] [Accepted: 11/19/2018] [Indexed: 01/08/2023]
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Synthesis of omega-3 ethyl esters from chia oil catalyzed by polyethylene glycol-modified lipases with improved stability. Food Chem 2019; 271:433-439. [DOI: 10.1016/j.foodchem.2018.07.215] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 07/06/2018] [Accepted: 07/31/2018] [Indexed: 12/13/2022]
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Orrego AH, Ghobadi R, Moreno-Perez S, Mendoza AJ, Fernandez-Lorente G, Guisan JM, Rocha-Martin J. Stabilization of Immobilized Lipases by Intense Intramolecular Cross-Linking of Their Surfaces by Using Aldehyde-Dextran Polymers. Int J Mol Sci 2018; 19:E553. [PMID: 29439521 PMCID: PMC5855775 DOI: 10.3390/ijms19020553] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 02/06/2018] [Accepted: 02/07/2018] [Indexed: 11/16/2022] Open
Abstract
Immobilized enzymes have a very large region that is not in contact with the support surface and this region could be the target of new stabilization strategies. The chemical amination of these regions plus further cross-linking with aldehyde-dextran polymers is proposed here as a strategy to increase the stability of immobilized enzymes. Aldehyde-dextran is not able to react with single amino groups but it reacts very rapidly with polyaminated surfaces. Three lipases-from Thermomyces lanuginosus (TLL), Rhizomucor miehiei (RML), and Candida antarctica B (CALB)-were immobilized using interfacial adsorption on the hydrophobic octyl-Sepharose support, chemically aminated, and cross-linked. Catalytic activities remained higher than 70% with regard to unmodified conjugates. The increase in the amination degree of the lipases together with the increase in the density of aldehyde groups in the dextran-aldehyde polymer promoted a higher number of cross-links. The sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) analysis of those conjugates demonstrates the major role of the intramolecular cross-linking on the stabilization of the enzymes. The highest stabilization was achieved by the modified RML immobilized on octyl-Sepharose, which was 250-fold more stable than the unmodified conjugate. The TLL and the CALB were 40-fold and 4-fold more stable than the unmodified conjugate.
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Affiliation(s)
- Alejandro H Orrego
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain.
| | - Rohollah Ghobadi
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain.
- Department of Chemistry, Kharazmi University, 1417466191 Tehran, Iran.
| | - Sonia Moreno-Perez
- Pharmacy and Biotechnology Department, School of Biomedical Sciences, Universidad Europea de Madrid, Villaviciosa de Odón, 28670 Madrid, Spain.
| | - Adriana Jaime Mendoza
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain.
- Departamento de Química, Universidad de Guadalajara, Guadalajara 44430, Jalisco, Mexico.
| | - Gloria Fernandez-Lorente
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain.
| | - Jose M Guisan
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain.
| | - Javier Rocha-Martin
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry, Consejo Superior de Investigaciones Científicas (CSIC), 28049 Madrid, Spain.
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16
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Shirke AN, White C, Englaender JA, Zwarycz A, Butterfoss GL, Linhardt RJ, Gross RA. Stabilizing Leaf and Branch Compost Cutinase (LCC) with Glycosylation: Mechanism and Effect on PET Hydrolysis. Biochemistry 2018; 57:1190-1200. [PMID: 29328676 DOI: 10.1021/acs.biochem.7b01189] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Cutinases are polyester hydrolases that show a remarkable capability to hydrolyze polyethylene terephthalate (PET) to its monomeric units. This revelation has stimulated research aimed at developing sustainable and green cutinase-catalyzed PET recycling methods. Leaf and branch compost cutinase (LCC) is particularly suited toward these ends given its relatively high PET hydrolysis activity and thermostability. Any practical enzymatic PET recycling application will require that the protein have kinetic stability at or above the PET glass transition temperature (Tg, i.e., 70 °C). This paper elucidates the thermodynamics and kinetics of LCC conformational and colloidal stability. Aggregation emerged as a major contributor that reduces LCC kinetic stability. In its native state, LCC is prone to aggregation owing to electrostatic interactions. Further, with increasing temperature, perturbation of LCC's tertiary structure and corresponding exposure of hydrophobic domains leads to rapid aggregation. Glycosylation was employed in an attempt to impede LCC aggregation. Owing to the presence of three putative N-glycosylation sites, expression of native LCC in Pichia pastoris resulted in the production of glycosylated LCC (LCC-G). LCC-G showed improved stability to native state aggregation while increasing the temperature for thermal induced aggregation by 10 °C. Furthermore, stabilization against thermal aggregation resulted in improved catalytic PET hydrolysis both at its optimum temperature and concentration.
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Affiliation(s)
- Abhijit N Shirke
- Department of Chemistry and Chemiscal Biology, Rensselaer Polytechnic Institute , Troy, New York 12180, United States.,Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
| | - Christine White
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
| | - Jacob A Englaender
- Department of Biology, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
| | - Allison Zwarycz
- Department of Biology, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
| | - Glenn L Butterfoss
- Center for Genomics and Systems Biology, New York University Abu Dhabi , Abu Dhabi, UAE
| | - Robert J Linhardt
- Department of Chemistry and Chemiscal Biology, Rensselaer Polytechnic Institute , Troy, New York 12180, United States.,Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute , Troy, New York 12180, United States.,Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute , Troy, New York 12180, United States.,Department of Biology, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
| | - Richard A Gross
- Department of Chemistry and Chemiscal Biology, Rensselaer Polytechnic Institute , Troy, New York 12180, United States.,Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute , Troy, New York 12180, United States.,Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
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17
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Clarke CJ, Tu WC, Levers O, Bröhl A, Hallett JP. Green and Sustainable Solvents in Chemical Processes. Chem Rev 2018; 118:747-800. [DOI: 10.1021/acs.chemrev.7b00571] [Citation(s) in RCA: 897] [Impact Index Per Article: 149.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Coby J. Clarke
- Department of Chemical Engineering, Imperial College, London SW7 2AZ, United Kingdom
| | - Wei-Chien Tu
- Department of Chemical Engineering, Imperial College, London SW7 2AZ, United Kingdom
| | - Oliver Levers
- Department of Chemical Engineering, Imperial College, London SW7 2AZ, United Kingdom
| | - Andreas Bröhl
- Department of Chemical Engineering, Imperial College, London SW7 2AZ, United Kingdom
| | - Jason P. Hallett
- Department of Chemical Engineering, Imperial College, London SW7 2AZ, United Kingdom
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18
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Remonatto D, de Oliveira JV, Manuel Guisan J, de Oliveira D, Ninow J, Fernandez-Lorente G. Production of FAME and FAEE via Alcoholysis of Sunflower Oil by Eversa Lipases Immobilized on Hydrophobic Supports. Appl Biochem Biotechnol 2018; 185:705-716. [PMID: 29297136 DOI: 10.1007/s12010-017-2683-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 12/19/2017] [Indexed: 10/18/2022]
Abstract
The performance of two new commercial low-cost lipases Eversa® Transform and Eversa® Transform 2.0 immobilized in different supports was investigated. The two lipases were adsorbed on four different hydrophobic supports. Interesting results were obtained for both lipases and for the four supports. However, the most active derivative was prepared by immobilization of Eversa® Transform 2.0 on Sepabeads C-18. Ninety-nine percent of fatty acid ethyl ester was obtained, in 3 h at 40 °C, by using hexane as solvent, a molar ratio of 4:1 (ethanol/oil), and 10 wt% of immobilized biocatalyst. The final reaction mixture contained traces of monoacylglycerols but was completely free of diacylglycerols. After four reaction cycles, the immobilized biocatalyst preserved 75% of activity. Both lipases immobilized in Sepabeads C-18 were very active with ethanol and methanol as acceptors, but they were much more stable in the presence of ethanol.
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Affiliation(s)
- Daniela Remonatto
- Department of Chemical and Food Engineering, UFSC, Florianópolis, SC, 88040-900, Brazil
| | | | - J Manuel Guisan
- Departamento de Biocatálisis, Instituto de Catálisis (CSIC),, UAM, Cantoblanco, 28049, Madrid, Spain
| | - Débora de Oliveira
- Department of Chemical and Food Engineering, UFSC, Florianópolis, SC, 88040-900, Brazil.
| | - Jorge Ninow
- Department of Chemical and Food Engineering, UFSC, Florianópolis, SC, 88040-900, Brazil
| | - Gloria Fernandez-Lorente
- Departamento de Biotecnología y Microbiología de los Alimentos, Instituto de Alimentación (CIAL), CSIC-UAM, Madrid, Spain
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19
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Mason M, Scampicchio M, Quinn CF, Transtrum MK, Baker N, Hansen LD, Kenealey JD. Calorimetric Methods for Measuring Stability and Reusability of Membrane Immobilized Enzymes. J Food Sci 2017; 83:326-331. [PMID: 29278666 DOI: 10.1111/1750-3841.14023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 11/17/2017] [Accepted: 12/01/2017] [Indexed: 11/30/2022]
Abstract
The aim of this work is to develop calorimetric methods for characterizing the activity and stability of membrane immobilized enzymes. Invertase immobilized on a nylon-6 nanofiber membrane is used as a test case. The stability of both immobilized and free invertase activity was measured by spectrophotometry and isothermal titration calorimetry (ITC). Differential scanning calorimetry was used to measure the thermal stability of the structure and areal concentration of invertase on the membrane. This is the 1st demonstration that ITC can be used to determine activity and stability of an enzyme immobilized on a membrane. ITC and spectrophotometry show maximum activity of free and immobilized invertase at pH 4.5 and 45 to 55 °C. ITC determination of the activity as a function of temperature over an 8-h period shows a similar decline of activity of both free and immobilized invertase at 55 °C. PRACTICAL APPLICATION Enzyme-catalyzed reactions occur in mild and environmentally friendly conditions, but are usually too costly to use in food manufacturing. When free enzymes are used, they are used once and replaced for each reaction, but enzymes immobilized on a solid support can be reused and have the additional advantage of being removed from the product. In this study, new calorimetric methods that are universally applicable to characterizing immobilized enzymes are used to determine the activity, stability, and reusability of invertase immobilized on a nanofiber support.
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Affiliation(s)
- Marco Mason
- Free Univ. of Bolzano/Bozen, Piazza Univ. 1, 39100, Bolzano, Italy.,Dept. of Nutrition, Dietetics and Food Science, Brigham Young Univ., Provo, UT 84602, U.S.A
| | | | | | - Mark K Transtrum
- Dept. of Physics and Astronomy, Brigham Young Univ., Provo, UT 84602, U.S.A
| | - Nicholas Baker
- Dept. of Nutrition, Dietetics and Food Science, Brigham Young Univ., Provo, UT 84602, U.S.A
| | - Lee D Hansen
- Dept. of Chemistry and Biochemistry, Brigham Young Univ., Provo, UT 84602, U.S.A
| | - Jason D Kenealey
- Dept. of Nutrition, Dietetics and Food Science, Brigham Young Univ., Provo, UT 84602, U.S.A
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20
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Abreu Silveira E, Moreno-Perez S, Basso A, Serban S, Pestana Mamede R, Tardioli PW, Sanchez Farinas C, Rocha-Martin J, Fernandez-Lorente G, Guisan JM. Modulation of the regioselectivity of Thermomyces lanuginosus lipase via biocatalyst engineering for the Ethanolysis of oil in fully anhydrous medium. BMC Biotechnol 2017; 17:88. [PMID: 29246143 PMCID: PMC5732512 DOI: 10.1186/s12896-017-0407-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Accepted: 12/06/2017] [Indexed: 11/23/2022] Open
Abstract
Background Enzymatic ethanolysis of oils (for example, high oleic sunflower oil containing 90% of oleic acid) may yield two different reaction products depending on the regioselectivity of the immobilized lipase biocatalyst. Some lipase biocatalysts exhibit a 1,3-regioselectivity and they produced 2 mols of fatty acid ethyl ester plus 1 mol of sn2-monoacylglycerol (2-MAG) per mol of triglyceride without the release of glycerol. Other lipase biocatalysts are completely non-regioselective releasing 3 mols of fatty acid ethyl ester and 1 mol of glycerol per mol of triglyceride. Lipase from Thermomyces lanuginosus (TLL) adsorbed on hydrophobic supports is a very interesting biocatalyst for the ethanolysis of oil. Modulation of TLL regioselectivity in anhydrous medium was intended via two strategies of TLL immobilization: a. - interfacial adsorption on different hydrophobic supports and b.- interfacial adsorption on a given hydrophobic support under different experimental conditions. Results Immobilization of TLL on supports containing divinylbenezene moieties yielded excellent 1,3-regioselective biocatalysts but immobilization of TLL on supports containing octadecyl groups yielded non-regioselective biocatalysts. On the other hand, TLL immobilized on Purolite C18 at pH 8.5 and 30 °C in the presence of traces of CTAB yielded a biocatalyst with a perfect 1,3-regioselectivity and a very interesting activity: 2.5 μmols of oil ethanolyzed per min per gram of immobilized derivative. This activity is 10-fold higher than the one of commercial Lipozyme TL IM. Immobilization of the same enzyme on the same support, but at pH 7.0 and 25 °C, led to a biocatalyst which can hydrolyze all ester bonds in TG backbone. Conclusions Activity and regioselectivity of TLL in anhydrous media can be easily modulated via Biocatalysis Engineering producing very active immobilized derivatives able to catalyze the ethanolysis of triolein. When the biocatalyst was 1,3-regioselective a 33% of 2-monoolein was obtained and it may be a very interesting surfactant. When biocatalyst catalyzed the ethanolysis of the 3 positions during the reaction process, a 99% of ethyl oleate was obtained and it may be a very interesting drug-solvent and surfactant. The absence of acyl migrations under identical reaction conditions is clearly observed and hence the different activities and regioselectivities seem to be due to the different catalytic properties of different derivatives of TLL.
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Affiliation(s)
- Erick Abreu Silveira
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC. Campus UAM, Cantoblanco, 28049, Madrid, Spain.,Federal University of Sao Carlos, Sao Carlos, SP, Brazil
| | - Sonia Moreno-Perez
- Pharmacy and Biotechnology Department, School of Biomedical Sciences, Universidad Europea de Madrid, Madrid, Spain
| | - Alessandra Basso
- Purolite, Unit D, Llantrisant Business Park, Llantrisant, CF72 8LF, UK
| | - Simona Serban
- Purolite, Unit D, Llantrisant Business Park, Llantrisant, CF72 8LF, UK
| | - Rita Pestana Mamede
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC. Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | | | | | - Javier Rocha-Martin
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC. Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - Gloria Fernandez-Lorente
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC. Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - Jose M Guisan
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC. Campus UAM, Cantoblanco, 28049, Madrid, Spain.
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21
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Trobo-Maseda L, Orrego AH, Moreno-Pérez S, Fernández-Lorente G, Guisan JM, Rocha-Martin J. Stabilization of multimeric sucrose synthase from Acidithiobacillus caldus via immobilization and post-immobilization techniques for synthesis of UDP-glucose. Appl Microbiol Biotechnol 2017; 102:773-787. [PMID: 29177938 DOI: 10.1007/s00253-017-8649-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 11/06/2017] [Accepted: 11/12/2017] [Indexed: 02/06/2023]
Abstract
Sucrose synthases (SuSys) have been attracting great interest in recent years in industrial biocatalysis. They can be used for the cost-effective production of uridine 5'-diphosphate glucose (UDP-glucose) or its in situ recycling if coupled to glycosyltransferases on the production of glycosides in the food, pharmaceutical, nutraceutical, and cosmetic industry. In this study, the homotetrameric SuSy from Acidithiobacillus caldus (SuSyAc) was immobilized-stabilized on agarose beads activated with either (i) glyoxyl groups, (ii) cyanogen bromide groups, or (iii) heterogeneously activated with both glyoxyl and positively charged amino groups. The multipoint covalent immobilization of SuSyAc on glyoxyl agarose at pH 10.0 under optimized conditions provided a significant stabilization factor at reaction conditions (pH 5.0 and 45 °C). However, this strategy did not stabilize the enzyme quaternary structure. Thus, a post-immobilization technique using functionalized polymers, such as polyethyleneimine (PEI) and dextran-aldehyde (dexCHO), was applied to cross-link all enzyme subunits. The coating of the optimal SuSyAc immobilized glyoxyl agarose with a bilayer of 25 kDa PEI and 25 kDa dexCHO completely stabilized the quaternary structure of the enzyme. Accordingly, the combination of immobilization and post-immobilization techniques led to a biocatalyst 340-fold more stable than the non-cross-linked biocatalyst, preserving 60% of its initial activity. This biocatalyst produced 256 mM of UDP-glucose in a single batch, accumulating 1 M after five reaction cycles. Therefore, this immobilized enzyme can be of great interest as a biocatalyst to synthesize UDP-glucose.
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Affiliation(s)
- Lara Trobo-Maseda
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - Alejandro H Orrego
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - Sonia Moreno-Pérez
- Pharmacy and Biotechnology Department, School of Biomedical Sciences, Universidad Europea, 28670, Madrid, Spain
| | - Gloria Fernández-Lorente
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - José M Guisan
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain.
| | - Javier Rocha-Martin
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain.
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22
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Hong CS, Lau CCY, Leong CY, Chua GK, Chin SY. A comparison of entrapped and covalently bonded laccase: Study of its leakage, reusability, and the catalytic efficiency in TEMPO-mediated glycerol oxidation. BIOCATAL BIOTRANSFOR 2017. [DOI: 10.1080/10242422.2017.1384467] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Chi Shein Hong
- Faculty of Chemical & Natural Resources Engineering, Universiti Malaysia Pahang, Gambang, Pahang, Malaysia
| | - Cindy Chin Yee Lau
- Faculty of Chemical & Natural Resources Engineering, Universiti Malaysia Pahang, Gambang, Pahang, Malaysia
| | - Chun Yi Leong
- Faculty of Chemical & Natural Resources Engineering, Universiti Malaysia Pahang, Gambang, Pahang, Malaysia
| | - Gek Kee Chua
- Faculty of Chemical & Natural Resources Engineering, Universiti Malaysia Pahang, Gambang, Pahang, Malaysia
| | - Sim Yee Chin
- Faculty of Chemical & Natural Resources Engineering, Universiti Malaysia Pahang, Gambang, Pahang, Malaysia
- Centre of Excellence for Advanced Research in Fluid Flow, Faculty of Chemical & Natural Resources Engineering, Universiti Malaysia Pahang, Gambang, Pahang, Malaysia
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23
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Semisynthetic Enzymes by Protein-Peptide Site-Directed Covalent Conjugation: Methods and Applications. Methods Enzymol 2017. [PMID: 28411642 DOI: 10.1016/bs.mie.2017.01.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
This chapter describes the rational design and synthesis of semisynthetic lipases by site-directed incorporation of tailor-made peptides on the lipase-lid site to improve its activity, specificity, and enantioselectivity in specific biotransformations. Cysteine was genetically introduced at a particular point of the oligopeptide lid of the enzyme, and cysteine-containing peptides, complementary to the amino acid sequence on the lid site of Geobacillus thermocatenulatus lipase (BTL), were covalently attached on the lid of two different cysteine-BTL variants based on a fast thiol-disulfide exchange ligation followed by desulfurization. The BTL variants were initially immobilized on solid support to introduce the advantages of solid-state chemistry, such as quantitative transformations, easy purification, and recyclability. In the two different immobilized variants BTL-A193C and BTL-L230C, the cysteine was then activated with 2-dipyridyldisulfide to help the disulfide exchange with the peptide, generating the semisynthetic enzyme in high yield. Excellent results of improvement of activity and selectivity were obtained. For example, the peptide-BTL conjugate (at position 193) was 40-fold more active than the corresponding unmodified enzyme for the hydrolysis of per-acetylated thymidine at pH 5, or fourfold in the desymmetrization of dimethyl-3-phenylglutarate at pH 7. The new enzyme also exhibited excellent enantioselectivity in the desymmetrization reaction with enantiomeric excess (ee) of >99% when compared to that of the unmodified enzyme (ee=78%).
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Küchler A, Messmer D, Schlüter AD, Walde P. Preparation and Applications of Dendronized Polymer-Enzyme Conjugates. Methods Enzymol 2017; 590:445-474. [PMID: 28411648 DOI: 10.1016/bs.mie.2017.01.014] [Citation(s) in RCA: 7] [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
Dendronized polymer-enzyme conjugates are large, water-soluble macromolecular structures built from a linear, fully synthetic, dendronized polymer (denpol), and several copies of enzyme molecules covalently bound to the peripheral functional groups of the denpol. Since denpol chains comprise repeating units with regularly branched side chains (dendrons), denpols have a cylindrical shape and are much thicker than conventional linear polymers. Depending on the dendron generation and chemical structure, denpols may have a large number of functional groups on their surface, exposed to the aqueous medium in which they are dissolved. Enzymes (and also other molecules) can be attached to these functional groups, for example, via a stable bis-aryl hydrazone (BAH) bond. The dendronized polymer scaffold might also serve as a nanoarmor and stabilize the delicate enzymes. One of the denpols which can be used for the preparation of denpol-enzyme conjugates is de-PG2. It has a poly(methacrylate) backbone and consists of second-generation dendrons with four peripheral amino groups in each repeating unit. The synthesis of de-PG2 and the preparation of a de-PG2 conjugate carrying BAH-linked proteinase K (proK), as an example, are described here for applications in the field of enzyme immobilization on solid surfaces. The nanoarmored enzyme-polymer conjugate indicated high stability and retention of enzymatic activity.
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