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Docolomanský P, Gemeiner P, Mislovicová D, Stefuca V, Danielsson B. Screening of concanavalin A-bead cellulose conjugates using an enzyme thermistor with immobilized invertase as the reporter catalyst. Biotechnol Bioeng 2012; 43:286-92. [PMID: 18615691 DOI: 10.1002/bit.260430404] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Screening and design of immobilized biocatalysts (IMBs) is a time-consuming process. An ideal process should be universal, fast, convenient, precise, and reproducible. Many of these requirements are met by enzymic flow microcalorimeters, also known as enzyme thermistors (ETs) or thermal assay probes (TAPs). Adaptation of ETs to real measurements of reaction rates requires coupling of the mathematical description of the reaction-diffusion phenomena in the ET column with heat balance and, subsequently, experimental verification of the mathematical model. This article presents such a process developed as an adaptation of ETs for the characterization of the microkinetic properties of IMBs and their further application for screening of IMBs. The IMBs characterized were the preparations of invertase, biospecificaly adsorbed on concanavalin A conjugated to activated bead cellulose. (c) 1994 John Wiley & Sons, Inc.
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Affiliation(s)
- P Docolomanský
- Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, 833 34 Bratislava, Slovakia
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2
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Mislovicová D, Pätoprstý V, Vikartovská A. Enzymatic oxidation and separation of various saccharides with immobilized glucose oxidase. Appl Biochem Biotechnol 2010; 162:1669-77. [PMID: 20339954 DOI: 10.1007/s12010-010-8948-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Accepted: 03/09/2010] [Indexed: 11/30/2022]
Abstract
Glucose oxidase from Aspergillus niger, the specific enzyme for beta-D-glucose oxidation, can also oxidize other related saccharides at very slow or negligible rates. The present study aimed to compare the kinetics of D-glucose oxidation using immobilized glucose oxidase on bead cellulose for the oxidation of related saccharides using the same biocatalyst. The significant differences were observed between the reaction rates for D-glucose and other saccharides examined. As a result, k (cat)/K (M) ratio for D-glucose was determined to be 42 times higher than D-mannose, 61.6 times higher than D-galactose, 279 times higher than D-xylose, and 254 times higher than for D-fructose and D-cellobiose. On the basis of these differences, the ability of immobilized glucose oxidase to remove D-glucose from D-cellobiose, D-glucose from D-xylose, and D-xylose from D-lyxose was examined. Immobilized catalase on Eupergit and mixed with immobilized glucose oxidase on bead cellulose or co-immobilized with glucose oxidase on bead cellulose was used for elimination of hydrogen peroxide from the reaction mixture. The accelerated elimination of D-glucose and D-xylose in the presence of co-immobilized catalase was observed. The co-immobilized glucose oxidase and catalase were able to decrease D-glucose or D-xylose content to 0-0.005% of their initial concentrations, while a minimum decrease of low oxidized saccharides D-xylose, D-cellobiose, and D-lyxose, respectively, was observed.
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Affiliation(s)
- Danica Mislovicová
- Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, Dúbravska cesta 9, Bratislava, Slovakia.
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3
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Nahálka J, Mislovicová D, Kavcová H. Targeting lectin activity into inclusion bodies for the characterisation of glycoproteins. Mol Biosyst 2009; 5:819-21. [PMID: 19603115 DOI: 10.1039/b900526a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Physiological aggregation of lectin functional domains into active inclusion bodies would provide a simple tool for glycocode reading by well-established agglutination assays.
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Affiliation(s)
- Jozef Nahálka
- Institute of Chemistry, Center for Glycomics, Slovak Academy of Sciences, SK-84538 Bratislava, Slovak Republic.
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4
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Flodrová D, Dzúrovä M, Lisková D, Mohand FA, Mislovicová D, Malovícová A, Voburka Z, Omelková J, Stratilová E. Pectate hydrolases of parsley (Petroselinum crispum) roots. Z NATURFORSCH C 2007; 62:382-8. [PMID: 17708444 DOI: 10.1515/znc-2007-5-611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The presence of various enzyme forms with terminal action pattern on pectate was evaluated in a protein mixture obtained from parsley roots. Enzymes found in the soluble fraction of roots (juice) were purified to homogeneity according to SDS-PAGE, partially separated by preparative isoelectric focusing and characterized. Three forms with pH optima 3.6, 4.2 and 4.6 clearly preferred substrates with a lower degree of polymerization (oligogalacturonates) while the form with pH optimum 5.2 was a typical exopolygalacturonase [EC 3. 2.1.67] with relatively fast cleavage of polymeric substrate. The forms with pH optima 3.6, 4.2 and 5.2 were released from the pulp, too. The form from the pulp with pH optimum 4.6 preferred higher oligogalacturonates and was not described in plants previously. The production of individual forms in roots was compared with that produced by root cells cultivated on solid medium and in liquid one.
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Affiliation(s)
- Dana Flodrová
- Faculty of Chemistry, Technical University of Brno, Purkynova 118, CZ-612 00 Brno, Czech Republic
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Mislovicová D, Kogan G, Gosselet NM, Sébille B, Soltés L. Controlling the Association of Adamantyl-Substituted Poly{N-[tris(hydroxymethyl)methyl]acrylamide} and aβ-Cyclodextrin/Epichlorohydrin Polymer by a Small Drug Molecule – Naproxen. Chem Biodivers 2007; 4:52-7. [PMID: 17256734 DOI: 10.1002/cbdv.200790006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Two polymeric substances, a poly{N-[tris(hydroxymethyl)methyl]acrylamide} (THMMA) substituted with adamantyl moieties and a beta-cyclodextrin/epichlorohydrin polycondensate, formed a host-guest type complex, which resulted in the gel formation upon mixing of these two compounds at appropriate conditions. Introduction of a drug molecule, i.e., naproxen, that was able to fill the beta-cyclodextrin cavities, thus expulsing adamantyl moieties, led to disruption of such association and inhibition of gel formation. The conditions required for the association of the two polymeric components and formation of the gel, as well as the dynamics of its inhibition by addition of naproxen was established. The procedure of using solutions of two associating polymers and an appropriate drug competitor can be used at targeted viscosupplementation.
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Affiliation(s)
- Danica Mislovicová
- Institute of Chemistry, Slovak Academy of Sciences, SK-84538 Bratislava, Slovak Republic
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Mislovicová D, Masárová J, Hostinová E, Gasperík J, Gemeiner P. Modulation of biorecognition of glucoamylases with Concanavalin A by glycosylation via recombinant expression. Int J Biol Macromol 2006; 39:286-90. [PMID: 16797066 DOI: 10.1016/j.ijbiomac.2006.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2006] [Revised: 04/10/2006] [Accepted: 04/10/2006] [Indexed: 11/24/2022]
Abstract
Various types of glucoamylases were prepared to modulate their biospecific interaction with Concanavalin A. Glucoamylase Glm was isolated from the native yeast strain Saccharomycopsis fibuligera IFO 0111. Two glycosylated recombinant glucoamylases Glu's of S. fibuligera HUT 7212 were expressed and isolated from the strains Saccharomyces cerevisiae and one, nonglycosylated, from Escherichia coli. The biospecific affinity of those preparations to Concanavalin A was investigated and compared with the commercially available fungal glucoamylase GA from Aspergillus niger. All glycosylated enzymes showed affinity to Concanavalin A characterized by their precipitation courses and by the equilibration dissociation constants within the range from 1.43 to 4.17 x 10(-6) M (determined by SPR method). The results suggested some differences in the interaction of Con A with the individual glucoamylases. The highest affinity to Con A showed GA. The recombinant glucoamylase Glu with the higher content of the saccharides was comprised by two binding sites with the different affinity. The glucoamylases with the lowest affinity (Glm and Glu with a lower content of saccharides) also demonstrated a nonspecific interaction with Con A in the precipitation experiments. The minimal differences between the individual glucoamylases were determined by the inhibition experiments with methyl-alpha-d-mannopyranoside.
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Affiliation(s)
- D Mislovicová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 38 Bratislava, Slovakia.
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Krizková L, Zitnanová I, Mislovicová D, Masárová J, Sasinková V, Duracková Z, Krajcovic J. Antioxidant and antimutagenic activity of mannan neoglycoconjugates: Mannan–human serum albumine and mannan–penicillin G acylase. Mutation Research/Genetic Toxicology and Environmental Mutagenesis 2006; 606:72-9. [PMID: 16677851 DOI: 10.1016/j.mrgentox.2006.03.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2005] [Revised: 12/15/2005] [Accepted: 03/13/2006] [Indexed: 11/26/2022]
Abstract
The antioxidant and antimutagenic activity of the yeast cell-wall mannan and mannan conjugates--in particular the mannan of Saccharomyces cerevisiae (M-S.c.) and conjugates of mannan S. cerevisiae with human serum albumin (M-HSA1, M-HSA2) and the microbial enzyme penicillin G acylase (M-PGA)--were evaluated in vitro in the unicellular flagellate Euglena gracilis exposed to the genotoxic agents ofloxacin and acridine orange (AO). M-S.c., M-HSA1, M-HSA2 and M-PGA show a statistically significant, concentration-dependent protective antigenotoxic activity against both compounds. M-PGA was the most efficient inhibitor of ofloxacin- and AO-induced chloroplast DNA damage, whereas M-HSA2 and M-HSA1 were less effective and M-S.c. had the lowest antigenotoxic activity. It is suggested that different mechanisms may be involved in their protective effect--antioxidant activity in the case of ofloxacin-induced DNA damage and direct adsorption of AO on mannan conjugates as possible mechanisms of protection, based on spectrophotometric measurements. The important characteristics of yeast cell-wall mannans and mannan conjugates, such as their high water solubility, their broad spectrum of biological activity, low toxicity, stability and their antimutagenic effects via different modes of action, appear to be promising features for their practical application as antioxidants and antimutagenic agents.
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Affiliation(s)
- Lívia Krizková
- Institute of Cell Biology, Comenius University, Faculty of Natural Sciences, Mlynská dolina, 842 15 Bratislava, Slovak Republic.
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8
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Paulovicová E, Bystrický S, Masárová J, Machová E, Mislovicová D. Immune response to Saccharomyces cerevisiae mannan conjugate in mice. Int Immunopharmacol 2005; 5:1693-8. [PMID: 16102519 DOI: 10.1016/j.intimp.2005.04.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2004] [Revised: 12/27/2004] [Accepted: 04/28/2005] [Indexed: 10/25/2022]
Abstract
Mannan, the surface polysaccharide antigen of Saccharomyces cerevisiae was partially oxidized and conjugated to a protein carrier. Prepared conjugate was immunogenic in mice and re-injection elicited significant increase of anti-S. cerevisiae specific IgG and IgM serum antibodies. There was somewhat less increase in IgM serum antibodies. Serum distribution of IgG subclasses, especially IgG(2(a+b)):IgG(1) ratio throughout the immunization demonstrated effective Th1 predominance of immune response. Newly synthesized S. cerevisiae mannan conjugate could be considered as a perspective vaccine candidate for preventive immunomodulation treatment.
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Affiliation(s)
- Ema Paulovicová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
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Mislovicová D, Masárová J, Vikartovská A, Gemeiner P, Michalková E. Biospecific immobilization of mannan-penicillin G acylase neoglycoenzyme on Concanavalin A-bead cellulose. J Biotechnol 2005; 110:11-9. [PMID: 15099901 DOI: 10.1016/j.jbiotec.2004.01.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2003] [Revised: 12/08/2003] [Accepted: 01/16/2004] [Indexed: 11/26/2022]
Abstract
The matter of this work was to evaluate possibilities of biospecific immobilization of synthetic mannan-penicillin G acylase neoglycoconjugate on Concanavalin A support. The conjugate containing 37% (w/w) of yeast mannan was prepared. Significant biospecific interaction of this neoglycoenzyme with Con A was confirmed by precipitation method. The biospecific sorption of conjugate was investigated using Concanavalin A-triazine bead celluloses MT-100 with different content of Con A (from 1.4 to 9.8 mgCon A/gwet support). The results obtained under optimal conditions were compared with those from covalent immobilization of PGA. The sorbent capacity was observed higher for covalent binding of enzyme. On the other hand, the biospecifically immobilized neoglycoenzyme retained a greater amount of initial activity. The maximum amount of 6.6mgimmobilizedneoglycoenzyme/gwet Con A-sorbent (18.1 U/g) was achieved. The amount as well as activity of immobilized mannan-penicillin G acylase was increased by its two multiple layering on surface of sorbent (10.1mg, respectively, 23.5 U/gwet sorbent). Determined storage and operational (using flow calorimetric method) stabilities of biospecifically immobilized enzyme, were similar, possibly somewhat higher that those of covalent bound penicillin G acylase.
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Affiliation(s)
- Danica Mislovicová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 38 Bratislava, Slovak Republic.
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Masárová J, Mislovicová D, Mendichi R, Svitel J, Gemeiner P, Danielsson B. Mannan-penicillin G acylase neoglycoproteins and their potential applications in biotechnology. Biotechnol Appl Biochem 2004; 39:285-91. [PMID: 15154839 DOI: 10.1042/ba20030169] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Mannan-penicillin G acylase neoglycoproteins were prepared by the conjugation of Saccharomyces cerevisiae mannan with enzyme penicillin G acylase using the reductive amination method. Eight neoglycoproteins preparations were obtained after gel chromatography. The preparations contained from 42 to 67% (w/w) saccharides and their molar masses varied from 283 to over 1000 kDa. Significant biospecific interaction of separated fractions with the lectin concanavalin A was evaluated by the precipitation and sorption method (equilibrium constants) and further characterized using surface plasmon resonance to determine kinetic association and dissociation constants. K (D) was determined over the range 10(-7) M. High-molar-mass preparations appeared to be more suitable for preparation of stable and active complexes with concanavalin A for prospective use as a penicillin G acylase biocatalyst in enzyme reactors. The enzyme stability of such complexes was significantly increased compared with the original neoglycoprotein. Lower-molar-mass preparations were more suitable for applications such as biocatalysts in bioanalytical devices.
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Affiliation(s)
- Jana Masárová
- Institute of Chemistry, Slovak Academy of Sciences, SK-84238 Bratislava, Slovakia.
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11
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Mislovicová D, Masárová J, Svitel J, Gemeiner P. Influence of mannan epitopes in glycoproteins–Concanavalin A interaction. Comparison of natural and synthetic glycosylated proteins. Int J Biol Macromol 2002; 30:251-8. [PMID: 12297232 DOI: 10.1016/s0141-8130(02)00035-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Two natural glycoproteins/glycoenzymes, invertase and glucoamylase, and two neoglycoconjugates, synthetized from Saccharomyces cerevisiae mannan, bovine serum albumin and penicillin G acylase were tested for interaction with lectin Concanavalin A (Con A). The interaction of natural and synthetic glycoproteins with Con A was studied using three different experimental methods: (i). quantitative precipitation in solution (ii). sorption to Con A immobilized on bead cellulose; and (iii). kinetic measurement of the interaction by surface plasmon resonance. Prepared neoglycoproteins were further characterized: saccharide content, molecular weight, polydispersion, kinetic and equilibrium association constants with Con A were determined. It can be concluded that the used conjugation method proved to be able to produce neoglycoproteins with similar properties like natural glycoproteins, i.e. enzymatic activity (protein part) and lectin binding activity (mannan part) were preserved and the neoglycoconjugates interact with Con A similarly as natural mannan-type glycoproteins.
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Affiliation(s)
- D Mislovicová
- Institute of Chemistry, Slovak Academy of Sciences, SK-842 38, Bratislava, Slovakia.
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Mislovicová D, Masárová J, Svitel J, Mendichi R, Soltés L, Gemeiner P, Danielsson B. Neoglycoconjugates of mannan with bovine serum albumin and their interaction with lectin concanavalin A. Bioconjug Chem 2002; 13:136-42. [PMID: 11792189 DOI: 10.1021/bc015517u] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Neoglycoconjugates were prepared from mannan isolated from yeast Saccharomyces cerevisiae and activated by periodate oxidation to create aldehyde groups. Various degrees of oxidation introduced 11-28 aldehyde groups per mannan molecule and simultaneously resulted in a molar mass decrease from 46 to 44.5-31 kDa. The activated mannans were subsequently conjugated with bovine serum albumin forming neoglycoconjugates. Some parameters of these mannan-bovine serum albumin conjugates were characterized: saccharide content 25-30% w/w, molar mass within the range 169-246 kDa, and polydispersion (M(w)/M(n)) from 2.8 to 3.6. The interaction of these conjugates with lectin concanavalin A was studied using three different methods: (i) quantitative precipitation in solution; (ii) sorption to concanavalin A immobilized on bead cellulose; and (iii) kinetic measurement of the interaction by surface plasmon resonance. Quantitative precipitation assay showed only negligible differences in the precipitation course of original mannan and the corresponding mannan-bovine serum albumin conjugates. Both the sorption method (equilibrium method) and the surface plasmon resonance measurement (kinetic method) demonstrates that the values of dissociation constant K(D) of all synthetic neoglycoconjugates were within the range 10(-7) - 10(-8) mol x L(-1) (close to K(D) = 10(-8) mol x L(-1) determined by the sorption method for the original mannan). In conclusion, characterization of synthetic neoglycoconjugates confirmed that the method used for their preparation retained the ability of mannan moiety to interact with concanavalin A.
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Affiliation(s)
- D Mislovicová
- Institute of Chemistry, Slovak Academy of Sciences, SK-842 38 Bratislava, Slovakia.
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Masárová J, Mislovicová D, Gemeiner P, Michalková E. Stability enhancement of Escherichia coli penicillin G acylase by glycosylation with yeast mannan. Biotechnol Appl Biochem 2001; 34:127-33. [PMID: 11592919 DOI: 10.1042/ba20010037] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Penicillin G acylase (PGA) from Escherichia coli was cross-linked with mannan dialdehydes. Conjugates were prepared with molecular masses varying from 140 to 580 kDa and containing from 18 to 50% (w/w) saccharides, the values depending on the reaction conditions (mannan/enzyme ratio), and by using mannans with different degrees of oxidation and weight-average molecular mass (M macro(w)). The pH- and thermo-stability of all preparations of glycosylated enzyme were improved remarkably, whereby the influence of the character of the linked mannan dialdehyde, its content, as well as the molecular mass of prepared glycoconjugates, on the stability of PGA, was evaluated. PGA glycosylated with the most oxidized mannan up to an M(w) of 490 kDa, containing 41% (w/w) saccharides, and retaining 90% of its original catalytic activity, showed the highest stability. The half-life of this PGA preparation increased significantly: 13-fold at pH 3, 7-fold at pH 10, and 3.5-fold at pH 8 (all at 37 degrees C), compared with the native enzyme. At higher temperatures (50 degrees C) even more significant stabilization was evident, a 16-fold increase in half-life, from 18 min to 289 min, at pH 8, being measured.
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Affiliation(s)
- J Masárová
- Institute of Chemistry SAS, Dúbravská cesta 9, SK-842 38 Bratislava, Slovak Republic.
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Mislovicová D, Masárová J, Gemeiner P. Study of interaction of mannan-BSA neoglycoconjugates with Concanavalin A. Artif Cells Blood Substit Immobil Biotechnol 2001; 29:335-45. [PMID: 11495014 DOI: 10.1081/bio-100104235] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Neoglycoconjugates prepared by synthesis of oxidized mannans from Saccharomyces cerevisiae with bovine serum albumin were studied for interaction with Concanavalin A. The mannan-bovine serum albumin neoglycoproteins, different in degree of mannan oxidation used for synthesis and its content in conjugates were prepared. The interaction of these glycoconjugates with Concanavalin A by using precipitation method was investigated. The conjugates prepared at high weight ratio mannan: protein (4:1) involved 47-65% of saccharides and formed by precipitation with Concanavalin A aggregates with low content of protein. The obtained results showed that conjugates with lower content of mannan (up to 30%) are more efficacious for their aggregation with Concanavalin A than the conjugates with high content of mannan.
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Affiliation(s)
- D Mislovicová
- Institute of Chemistry Slovak Academy of Sciences, Bratislava, Slovak Republic
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15
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Mislovicová D, Masárová J, Bendzálová K, Soltés L, Machová E. Sonication of chitin-glucan, preparation of water-soluble fractions and characterization by HPLC. Ultrason Sonochem 2000; 7:63-68. [PMID: 10769872 DOI: 10.1016/s1350-4177(99)00030-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A water-insoluble chitin-glucan complex, isolated from the mycelium of Aspergillus niger, was swollen in various aqueous media and treated subsequently by high-energy sonication. The concentration of the resulting water-soluble polysaccharide fractions was dependent on the swelling medium, the amount of the chitin-glucan complex in the suspension, and on the time of sonication. The yields of water-soluble chitin-glucan were within the range 13.6 to 24.4% relative to the mass of the original chitin-glucan. The nitrogen content obtained for the samples of water-soluble chitin-glucan indicated a higher content of chitin (3.45% of nitrogen in high-molecular fraction) than in the original water-insoluble chitin-glucan sample (1.8%). The distribution of the molecular weights of the water-soluble fractions prepared was determined by high-performance liquid chromatography.
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Affiliation(s)
- D Mislovicová
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic.
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16
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Mislovicová D, Gemeiner P, Sandula J, Masárová J, Vikartovská A, Docolomanský P. Examination of bioaffinity immobilization by precipitation of mannan and mannan-containing enzymes with legume lectins. Biotechnol Appl Biochem 2000; 31:153-9. [PMID: 10744960 DOI: 10.1042/ba19990086] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The interaction of four lectins from crops of the legume family with Saccharomyces cerevisiae alpha-mannan, and also with two glycoenzymes containing mainly alpha-mannan moieties, has been studied. The interaction was characterized by a quantitative precipitation assay. The results of precipitation differ with respect to both quality (the point of maximum precipitation) and of the quantity (the amount of aggregated lectin and saccharide). The lectin concanavalin A [Con A, from jack bean (Canavalia ensiformis)] was observed to form more extensive precipitates with Saccharomyces cerevisiae mannan and glycoenzymes than did lectins from Lens culinaris (lentil) and Pisum sativum (garden pea), while in the case of Vicia faba (broad or fava bean) no interaction was found with either the examined mannans or with glycosylated enzymes. The complete precipitation of invertase and glucoamylase with Con A (enzymes and also Con A; up to 100%) was achieved at a Con A glycoenzyme molar ratio of 20.2 and 2.3 respectively, whereby about 85% of precipitated and also of initial activities of glycoenzymes were determined in the aggregates. More valuable results were achieved by the technique of enzyme immobilization called 'multiple bioaffinity layering' which is based on the stepwise biospecific adsorption of the glycosylated enzymes and Con A on a matrix precoupled with Con A. A 3-fold repetition of the layering procedure afforded up to a 10-fold increase in catalytic activity of the immobilized invertase, in contrast with a 2.1-fold increase in catalytic activity of the immobilized glucoamylase.
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Affiliation(s)
- D Mislovicová
- Institute of Chemistry, Laboratory of Glycobiotechnology, Slovak Academy of Sciences, Dúbravská cesta 9, SK-842 38 Bratislava, Slovak Republic
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17
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Gemeiner P, Polakovic M, Mislovicová D, Stefuca V. Cellulose as a (bio)affinity carrier: properties, design and applications. J Chromatogr B Biomed Sci Appl 1998; 715:245-71. [PMID: 9792514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
This contribution presents a framework for the rational design of affinity sorbents based on cellulose materials as a support. A three-level evaluation procedure, utilizing the knowledge of physical, chemical and engineering theories, is discussed, which integrates the design of support, affinity sorbent and chromatographic contactor. The principal support properties, such as morphological, diffusional, hydrodynamic, mechanical or ligand-binding properties, are presented and literature data on them are surveyed.
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Affiliation(s)
- P Gemeiner
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic
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Stratilová E, Mislovicová D, Kacuráková M, Machová E, Kolarová N, Markovic O, Jörnvall H. The glycoprotein character of multiple forms of Aspergillus polygalacturonase. J Protein Chem 1998; 17:173-9. [PMID: 9535279 DOI: 10.1023/a:1022587718117] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Comparisons of known primary structures of polygalacturonases show that extent and localization of potential N-glycosylation sites differ. Some sites are similar in position and adjacent to strictly conserved residues at the potential active site. The presence of N-acetylglucosamine and mannose in the molecules of two homogeneous, major Aspergillus sp. polygalacturonase forms was confirmed by IR spectroscopy. The purification method, based on interaction of the carbohydrate part with concanavalin A immobilized on chlorotriazine bead cellulose, was optimized. Deglycosylation with N-glycosidase F under denaturating and nondenaturating conditions led to molecular mass decreases followed by complete inactivation of the polygalacturonase enzyme activity. These results show the importance of glycosylation in these protein forms, while the comparative patterns establish both variability and some similarities in overall glycosylation architectures.
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Affiliation(s)
- E Stratilová
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava
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Mislovicová D, Vikartovská A, Gemeiner P. The glycosylated enzyme-binding assay for the study of the interaction of free and immobilized lectins with carbohydrates. J Biochem Biophys Methods 1997; 35:37-48. [PMID: 9310866 DOI: 10.1016/s0165-022x(97)00022-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The glycosylated enzymes (invertase and glucose oxidase) were used as the competitive markers for a simple and rapid determination of the lectin-saccharide interactions. The method, based on the formation of the conjugate of an appropriate glycoenzyme with the specific carbohydrate-binding lectins and the inhibition of the conjugate formation with a monosaccharide, was described. This method was used to estimate the relative carbohydrate specificity of Concanavalin A for monosaccharides derived from D-mannose. The inhibition effect of the saccharides on the formation of Concanavalin A-glycosylated enzyme precipitate was compared with their influence on the enzyme sorption on conjugate Concanavalin A-bead cellulose support. The amount of the interacting enzyme was estimated either indirectly from its concentration in a supernatant that was determined spectrophotometrically (Con A was in a free or immobilized form) or directly in the immobilized form linked to Con A-sorbent using the flow microcalorimetric method. The results obtained, using different methods, agreed in general.
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Affiliation(s)
- D Mislovicová
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic.
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Soltés L, Mislovicová D, Sébille B. Insight into the distribution of molecular weights and higher-order structure of hyaluronans and some beta-(1 --> 3)-glucans by size exclusion chromatography. Biomed Chromatogr 1996; 10:53-9. [PMID: 8924726 DOI: 10.1002/(sici)1099-0801(199603)10:2<53::aid-bmc552>3.0.co;2-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The effects of high energy ultrasound and slightly raised temperature combined with the denaturing action of dimethylsulphoxide on the molecular weight and higher-order structure of hyaluronans and some beta-(1 --> 3)-glucans were studied by means of size exclusion chromatography (SEC) technique. Some experimental conditions connected with the (bio-)polymer sample preparation prior to its SEC analysis are overviewed in the light of informational relevance of studies where the action of a physical and/or chemical agent changes the hydrodynamic size of the m omolecule.
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Affiliation(s)
- L Soltés
- Institute of Experimental Pharmacology, Slovak Academy of Sciences, Bratislava, Slovak Republic
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Abstract
A method based on the flow microcalorimetric determination of catalytic activity of immobilized enzyme in a so-called enzyme thermistor was used to monitor the process of lectin affinity chromatography of invertase on Concanavalin A-bead cellulose. The strong biospecific interaction between Concanavalin A and invertase was employed to determine the bound enzyme and this principle was used for the investigation of an alternative direct method for monitoring the lectin affinity chromatography of glycoenzymes. The results obtained by flow microcalorimetry showed that the catalytic activity of invertase immobilized on Concanavalin A-bead cellulose can be compared directly with the thermometric value delta Tmax. The validity of the method was also confirmed by the enzyme thermistor post-column method, which is based on the determination of the product from the immobilized invertase enzymatic reaction. The adsorption and desorption in the chromatography column were examined by flow microcalorimetry in small samples withdrawn from the column. Attention has been given to the operating parameters and the storage stability of the affinity sorbent. The binding ability of the affinity matrix decreased with the number of consecutive chromatographic runs, although its storage stability was satisfactory.
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Affiliation(s)
- D Mislovicová
- Institute of Chemistry, Slovak Academy of Sciences, Slovak Republic
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Kremnický L, Sláviková E, Mislovicová D, Biely P. Production of extracellular beta-mannanases by yeasts and yeast-like microorganisms. Folia Microbiol (Praha) 1996; 41:43-7. [PMID: 9090823 DOI: 10.1007/bf02816339] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A new screening method for simultaneous detection of endo-beta-1,4-mannanase and endo-beta-1,4-xylanase producing microorganisms is described. Two differently dyed substrates Ostazin Brilliant Red-galactomannan and Remazol Brilliant Blue-xylan were incorporated into the same agar media. Decolorizing of one or both substrates around the cell colonies indicates secretion of the corresponding enzyme(s). The method was used to screen 449 yeasts and yeast-like microorganisms belonging to 68 different genera. The secretion of endo-beta-1,4-mannanases and/or endo-beta-1,4-xylanases was found within 10 genera (42 positive strains out of 261 tested). A low frequency of occurrence of endo-beta-1,4-mannanases was observed within the genera Cryptococcus (1 positive strain out of 15 tested), Geotrichum (1 of 6) and Pichia (1 of 35). The highest frequency of occurrence of endo-beta-1,4-mannanases was found within the genera Stephanoascus (2 of 2) and Aureobasidium (14 of 14). Strains hydrolyzing Ostazin Brilliant Red-galactomannan were cultivated in liquid media containing 1% locust bean gum. The best producers of extracellualr endo-beta-1,4-mannanases were found to be the strains of Aureobasidium pullulans.
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Affiliation(s)
- L Kremnický
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovakia
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Mislovicová D, Chudinová M, Gemeiner P, Docolomanský P. Affinity chromatography of invertase on concanavalin A-bead cellulose matrix: the case of an extraordinary strong binding glycoenzyme. J Chromatogr B Biomed Appl 1995; 664:145-53. [PMID: 7757219 DOI: 10.1016/0378-4347(94)00447-d] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
This work presents confirmation of the biospecific character of the interaction of Concanavalin A (Con A) immobilized on bead cellulose with invertase. In spite of the extraordinary strong binding of invertase to this Con A conjugate (KD = 5 x 10(-9) M), conditions have been found to use Con A-bead cellulose as an affinity chromatography medium. The effective factor in the release of the bound invertase by the counter ligand (alpha-methyl-D-mannopyranoside) is the time of incubation. This phenomenon was demonstrated in both batch and flow-through experiments. A concentration of 1.5 mg Con A per ml of gel was found to be suitable with regard to the maximal invertase/Con A binding ratio and the optimal invertase recovery (94%). As a result of the strong biospecific interaction the purification of invertase was very effective (above ten-fold). Verification by FPLC and PAGE of the product purity revealed only one significant protein band.
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Affiliation(s)
- D Mislovicová
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava
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Breier A, Durisová V, Stankovicová T, Mislovicová D, Gemeiner P. Application of adsorption kinetics for estimation of dissociation constants. J Biochem Biophys Methods 1991; 22:185-93. [PMID: 1865051 DOI: 10.1016/0165-022x(91)90067-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Substances such as drugs, as well as special ligands with expressive biospecific properties, all with different affinities, interact with proteins which can be characterized by dissociation constants. The method for estimation of the dissociation constant on the basis of adsorption kinetics was verified for two typical cases: adsorption of lactate dehydrogenase onto bead cellulose derivatized by reactive dyes C.I.2. or C.I.19, and adsorption of different drugs (neuroleptics and local anesthetics) onto calmodulin immobilized on agarose gel. The real equilibrium values obtained by using the complete time-concentration model of adsorption were fitted according to the respective adsorption isotherms by non-linear regression.
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Affiliation(s)
- A Breier
- Institute of Molecular Physiology and Genetics, Slovak Academy of Sciences, Bratislava, Czechoslovakia
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Abstract
A new soluble chromogenic substrate for alpha-amylase was prepared by coupling partially hydrolyzed starch with a dye, Ostazin brilliant red H-3B. The substrate is precipitable from buffered solutions with ethanol and is equally suitable for assay of alpha-amylase, detection of separated alpha-amylase isoenzymes in gels, and selection of microbial producers of the enzyme.
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Affiliation(s)
- P Biely
- Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Czechoslovakia
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Abstract
New soluble chromogenic substrates were prepared for specific and rapid assays of endo-1,4-beta-xylanases and endo-1,4-beta-glucanases. A soluble beechwood 4-O-methyl-D-glucurono-D-xylan was dyed with Remazol brilliant blue R, and hydroxyethylcellulose was coupled to Ostazin brilliant red H-3B. The assays are based on photometric measurements of the enzyme-released dyed fragments soluble in the presence of organic solvents which precipitate the original substrates and their high-molecular-weight fractions. The assays are advantageous for rapid analyses of large amount of samples and also permit evaluation of the activities of both enzymes in the presence of exo-beta-glycanases and beta-glycosidases, at a high level of reducing compounds and viable cells, on the cell surface and on cell membranes and organelles.
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Abstract
A simple, highly sensitive zymogram technique for detection of endo-1,4-beta-glucanases and endo-1,4-beta-xylanases in polyacrylamide gels after electrophoresis or isoelectric focusing was developed. The detection employs transparent agar replicas containing soluble covalently dyed polysaccharides, hydroxyethylcellulose dyed with Ostazin brilliant red H-3B and beechwood 4-O-methyl-D-glucurono-D-xylan dyed with Remazol brilliant blue R, as the respective substrates. The high sensitivity of the detection is achieved by selective removal of depolymerized dyed substrates from the agar replicas by solvents which neither solubilize nor precipitate the original nondegraded dyed polysaccharides present in the agar gel.
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Mislovicová D, Gemeiner P, Kuniak L, Zemek J. Affinity chromatography of rat liver lactate dehydrogenase on the Remazol derivative of bead cellulose. J Chromatogr A 1980; 194:95-9. [PMID: 6156184 DOI: 10.1016/s0021-9673(00)81056-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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