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Dráb T, Ren Š, Maňásková-Postlerová P, Tichá M, Jonáková V, Liberda J. Glycosidases in porcine follicular fluid and their effect on zona pellucida-AWN 1 spermadhesin interaction. Theriogenology 2017; 100:80-87. [PMID: 28708538 DOI: 10.1016/j.theriogenology.2017.06.011] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 06/02/2017] [Accepted: 06/06/2017] [Indexed: 01/03/2023]
Abstract
Oligosaccharide moieties on the surface of the oocyte belong to the key molecules that direct the course of fertilization and are subjected to changes during oocyte maturation in the follicle. In our study, we focused on the activities of five glycosidases in the fluids from porcine secondary and preovulatory follicles (α-l-fucosidase, α-d-galactosidase, β-d-galactosidase, β-D-N-acetylhexosaminidase, and α-d-mannosidase). All of them were detected active at neutral and acidic pH. However, changes in their activities associated with follicle development were observed only in the case of α-d-mannosidase, which was increased (P < 0.001), and β-d-galactosidase, which was decreased (P < 0.001) at neutral pH, and of α-d-galactosidase and β-N-acetylhexosaminidase, which were decreased (P < 0.0001) at the acidic pH. The comparison of glycosidases from follicular fluid and from blood plasma using red native electrophoresis revealed that most of the glycosidases are present in more than one isoenzyme form; some of them were detected mainly in the follicular fluid. Finally, we tested the effect of glycosidases on the interaction between zona pellucida and AWN 1 spermadhesin (putative sperm receptor of zona pellucida) and demonstrated that the effect of both β-d-galactosidase and to a lesser degree α-d-mannosidase led to a decrease in this interaction. We can hypothesize that these two glycosidases modulate the amount of zona pellucida oligosaccharide moieties and/or their structures for an optimal sperm binding in pigs.
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Affiliation(s)
- Tomáš Dráb
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2, Czech Republic; Division of Crop Protection and Plant Health, Crop Research Institute, Drnovská 507/73, Prague 6, Czech Republic
| | - Štěpán Ren
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2, Czech Republic; Laboratory of Reproductive Biology, Institute of Biotechnology, Czech Academy of Sciences, v.v.i., BIOCEV, Průmyslová 595, Vestec, Czech Republic
| | - Pavla Maňásková-Postlerová
- Laboratory of Reproductive Biology, Institute of Biotechnology, Czech Academy of Sciences, v.v.i., BIOCEV, Průmyslová 595, Vestec, Czech Republic.
| | - Marie Tichá
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2, Czech Republic
| | - Věra Jonáková
- Laboratory of Reproductive Biology, Institute of Biotechnology, Czech Academy of Sciences, v.v.i., BIOCEV, Průmyslová 595, Vestec, Czech Republic
| | - Jiří Liberda
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2, Czech Republic
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Ryšlavá H, Valenta R, Hýsková V, Křížek T, Liberda J, Coufal P. Purification and enzymatic characterization of tobacco leaf β-N-acetylhexosaminidase. Biochimie 2014; 107 Pt B:263-9. [PMID: 25242193 DOI: 10.1016/j.biochi.2014.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 09/05/2014] [Indexed: 01/17/2023]
Abstract
The kinetic properties of β-N-acetylhexosaminidase purified from tobacco (Nicotiana tabacum L.) leaves have been investigated. In addition to chromogenic pNP derivates, N,N'-diacetylchitobiose and N,N',N″-triacetylchitotriose were also used as substrates of β-N-acetylhexosaminidase. The highest reaction rate and the affinity for the substrate were observed for pNP-GlcNAc; however, an excess of this substrate inhibits the reaction. The reaction rate with pNP-GalNAc as the substrate was found to be about 85% of that obtained with pNP-GlcNAc. The hydrolysis of acetylated chitooligomers by β-N-acetylhexosaminidase followed by separation and quantification using capillary electrophoresis was slower compared to pNP-GlcNAc. The pH optimum of β-N-acetylhexosaminidase for individual substrates was found at 4.3-5.0 and the temperature optimum was 50-55 °C. Gel permeation chromatography and red native electrophoresis determined the relative molecular weight as 280 000 and the isoelectric point as 5.3. The inhibition of β-N-acetylhexosaminidase by monosaccharides GlcN, GalN, GlcNAc, GalNAc in combination with substrates pNP-GlcNAc and pNP-GalNAc was studied and the type of inhibition and the inhibition constants were determined.
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Affiliation(s)
- Helena Ryšlavá
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2 128 40, Czech Republic.
| | - Robert Valenta
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2 128 40, Czech Republic
| | - Veronika Hýsková
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2 128 40, Czech Republic
| | - Tomáš Křížek
- Department of Analytical Chemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2 128 40, Czech Republic
| | - Jiří Liberda
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2 128 40, Czech Republic
| | - Pavel Coufal
- Department of Analytical Chemistry, Faculty of Science, Charles University, Hlavova 2030, Prague 2 128 40, Czech Republic
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Dráb T, Kračmerová J, Hanzlíková E, Černá T, Litváková R, Pohlová A, Tichá M, Přikryl P, Liberda J. The antimicrobial action of histones in the reproductive tract of cow. Biochem Biophys Res Commun 2014; 443:987-90. [DOI: 10.1016/j.bbrc.2013.12.077] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Accepted: 12/15/2013] [Indexed: 01/21/2023]
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Dráb T, Kračmerová J, Tichá I, Hanzlíková E, Tichá M, Ryšlavá H, Doubnerová V, Maňásková-Postlerová P, Liberda J. Native Red Electrophoresis - A new method suitable for separation of native proteins. Electrophoresis 2011; 32:3597-9. [DOI: 10.1002/elps.201100310] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Dráb T, Kračmerová J, Tichá I, Hanzlíková E, Tichá M, Liberda J. Native polyacrylamide electrophoresis in the presence of Ponceau Red to study oligomeric states of protein complexes. J Sep Sci 2011; 34:1692-5. [DOI: 10.1002/jssc.201000869] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 04/19/2011] [Accepted: 04/26/2011] [Indexed: 11/07/2022]
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Naiman K, Hodek P, Liberda J, Schmeiser HH, Frei E, Stiborová M. Rat liver microsomal metabolism of o-aminophenol and N-(2-methoxyphenyl)hydroxylamine, two metabolites of the environmental pollutant and carcinogen o-anisidine in humans. ACTA ACUST UNITED AC 2010. [DOI: 10.1135/cccc2010077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
o-Aminophenol and N-(2-methoxyphenyl)hydroxylamine are human metabolites of the industrial and environmental pollutant and bladder carcinogen 2-methoxyaniline (o-anisidine). The latter one is also a human metabolite of another pollutant and bladder carcinogen, 2-methoxynitrobenzene (o-nitroanisole). Here, we investigated the ability of rat hepatic micro- somes to metabolize these metabolites. N-(2-methoxyphenyl)hydroxylamine is metabolized by rat hepatic microsomes to o-aminophenol and predominantly o-anisidine, the parent carcinogen from which N-(2-methoxyphenyl)hydroxylamine is formed. In addition, two N-(2-methoxyphenyl)hydroxylamine metabolites, whose exact structures have not been identified as yet, were generated. On the contrary, no metabolites were found to be formed from o-aminophenol by rat hepatic microsomes. Whereas N-(2-methoxyphenyl)hydroxylamine is responsible for formation of three deoxyguanosine adducts in DNA, o-aminophenol seems to be a detoxication metabolite of N-(2-methoxyphenyl)hydroxylamine and/or a parental carcinogen, o-anisidine; no o-aminophenol-derived DNA adducts were found after its reaction with microsomal cytochromes P450 and peroxidases.
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Ryšlavá H, Doubnerová V, Muller K, Baťková P, Schnablová R, Liberda J, Synková H, Čeřovská N. The Enzyme Kinetics of the NADP-Malic Enzyme from Tobacco Leaves. ACTA ACUST UNITED AC 2007. [DOI: 10.1135/cccc20071420] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Malic enzyme (L-malate: NADP+ oxidoreductase (oxaloacetate-decarboxylating), EC 1.1.1.40, NADP-ME), which was found in chloroplasts, was isolated from tobacco leaves (Nicotiana tabacum L.) almost homogenous. The specific enzyme activity was 0.95 μmol min-1 mg-1. The enzyme pH optimum was found between pH 7.1 and 7.4. The affinity of NADP-ME to substrates (L-malate and NADP+) was evaluated in the presence of divalent metal ions (Mg2+, Mn2+, Co2+, Ni2+). The value of the apparent Michaelis constant of NADP-ME for L-malate was dependent on the ion cofactor, while no such relationship was found for NADP+. The dependence of the reaction rate on concentration of Mg2+ indicates the presence of more than one binding site for these ions in NADP-ME. Likewise, the sigmoidal dependence of the reaction rate on Mn2+ concentration and the value of Hill coefficient 7.5 indicate the positive cooperativity of the reaction kinetics in the presence of the ions. The effect of Co2+ and Ni2+ ions was analogous to that of Mn2+ ions; however, the cooperativity was lower (the values of Hill coefficients were 3.0 and 1.3 for Co2+ and Ni2+, respectively). Regulation of NADP-ME from tobacco leaves by divalent metal ions is discussed.
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Jelínková P, Ryšlavá H, Liberda J, Jonáková V, Tichá M. Aggregated Forms of Bull Seminal Plasma Proteins and Their Heparin-Binding Activity. ACTA ACUST UNITED AC 2004. [DOI: 10.1135/cccc20040616] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Heparin-binding activity of bull seminal plasma proteins was shown to be dependent on their aggregation state. The protein fraction interacting with immobilized heparin was characterized by large polydispersity in the region of molecular weight of 60 000-10 000, while that not retained on the affinity carrier was present as aggregates with molecular weight >100 000. Components of heparin-binding and non-heparin-binding fractions were separated by RP HPLC (reversed-phase HPLC) and analyzed by SDS (sodium dodecyl sulfate) electrophoresis and N-terminal sequencing. Size exclusion chromatography of whole seminal plasma and heparin-binding proteins in the presence of D-fructose (as a component of seminal plasma) showed that the region of molecular weights of protein-associated forms was shifted to lower values. An increase of heparin-binding activity of bull proteins, as determined by ELBA (Enzyme-Linked Binding Assay), correlates with a decrease of their aggregation state. The modulation of the aggregation state of bull proteins by seminal plasma components and, in this way, also of their heparin-binding properties suggests possible mechanisms for capacitation mediated by these proteins.
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Liberda J, Ryslavá H, Jelínková P, Jonáková V, Tichá M. Affinity chromatography of bull seminal proteins on mannan-Sepharose. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 780:231-9. [PMID: 12401348 DOI: 10.1016/s1570-0232(02)00521-4] [Citation(s) in RCA: 12] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The interaction of bull seminal plasma proteins and sperm with mannan was investigated using an enzyme-linked binding assay (ELBA). A high mannan-binding activity was found in the protein fraction interacting with heparin. Mannan binding to seminal plasma proteins was inhibited by D-mannose and D-fructose, but not by D-mannose-6-phosphate, D-glucose-6-phosphate, ovalbumin and ovomucoid. Mannan inhibited the binding of bovine zona pellucida glycoproteins both to bull sperm and seminal plasma proteins. Yeast mannan immobilized to divinyl sulfone-activated Sepharose was used for the isolation of mannan-binding proteins. The protein components of this fraction were identified on the basis of relative molecular mass determination and N-terminal amino acid sequencing: RNAase dimer, PDC-109 and a protein homologous to BSP-30K (relative molecular mass 14,500). The isolated proteins were characterized by a high zona pellucida binding activity.
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Affiliation(s)
- J Liberda
- Department of Biochemistry, Charles University, Albertov 2030, 128 40 Praha 2, Czech Republic
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Liberda J, Manásková P, Svesták M, Jonáková V, Tichá M. Immobilization of L-glyceryl phosphorylcholine: isolation of phosphorylcholine-binding proteins from seminal plasma. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 770:101-10. [PMID: 12013216 DOI: 10.1016/s0378-4347(01)00540-0] [Citation(s) in RCA: 12] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The preparation of an affinity sorbent containing immobilized L-glyceryl phosphorylcholine for affinity chromatography of phosphorylcholine-binding proteins from seminal plasma is described. The ligand was coupled either after its maleinylation to poly(acrylamide-allyl amine) copolymer or directly to divinyl sulfone-activated Sepharose. The prepared phosphorylcholine derivative coupled to Sepharose was used for affinity chromatography of phosphorylcholine-binding proteins from bull and boar seminal plasma. Adsorbed proteins were specifically eluted with phosphorylcholine solution. Isolated phosphorylcholine-binding proteins were characterized by SDS electrophoresis and HPLC with reversed phase. Composition of the boar phosphorylcholine-binding fraction obtained by affinity chromatography on immobilized L-glyceryl phosphorylcholine was compared with that eluted from immobilized heparin by the phosphorylcholine solution. No phosphorylcholine-binding proteins were found in human seminal plasma.
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Affiliation(s)
- J Liberda
- Department of Biochemistry, Charles University, Prague, Czech Republic.
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Liberda J, Kraus M, Ryslavá H, Vlasáková M, Jonáková V, Tichá M. D-fructose-binding proteins in bull seminal plasma: isolation and characterization. Folia Biol (Praha) 2002; 47:113-9. [PMID: 11508854] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The heparin-binding activity of bull seminal plasma proteins was inhibited by D-fructose, D-glucose, inulin and glycogen; D-galactose, dextran and mannan had no effect. While the ejaculated sperm-heparin interaction was not influenced by the presence of saccharides, the heparin-binding activity of epididymal sperm was inhibited by D-fructose. The results of the binding studies were confirmed by affinity chromatography on immobilized heparin followed by elution with monosaccharides. Proteins adsorbed to a heparin-polyacrylamide column and eluted with D-fructose were analyzed by RP HPLC, SDS electrophoresis and by determination of the N-terminal amino-acid sequence. RNAase dimer, PDC-109 and metalloproteinase inhibitor (TIMP-2) were identified.
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Affiliation(s)
- J Liberda
- Department of Biochemistry, Charles University, Prague, Czech Republic
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Manásková P, Liberda J, Tichá M, Jonáková V. Aggregated and monomeric forms of proteins in boar seminal plasma: characterization and binding properties. Folia Biol (Praha) 2001; 46:143-51. [PMID: 10954159] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Boar seminal plasma was separated into five protein fractions (I-V) (>100, 55, 45, 30, 5-15 kDa) by gel filtration chromatography on Sephadex G-75 SF at pH 7.4. RP HPLC of protein fractions I-V and N-terminal sequencing of their individual components revealed that high-molecular-weight aggregates consisted mainly of DQH sperm surface protein and AQN, AWN, PSP II spermadhesins, while fraction IV consisted of heterodimers of PSP spermadhesins only. Spermadhesins as monomers were present in seminal plasma in a very low amount. Biotinylated fractions I-IV containing AWN, AQN, DQH, and PSP proteins were bound to boar epididymal and ejaculated spermatozoa with the same efficiency. Aggregates containing AWN, AQN, DQH, PSP II proteins (fractions I-III) and their HPLC-separated monomeric forms interacted with phosphorylcholine. Aggregates containing the DQH protein and AWN spermadhesins as well as their separated monomeric proteins interacted strongly with acidic polysaccharides. PSP II interacted with some acidic polysaccharides, while the fraction IV corresponding to heterodimer PSP IPSP II did not show any binding to acidic polysaccharides and zona pellucida. Fractions I-III showed affinity to cholesterol. The strongest interaction was observed between biotinylated glycoproteins of porcine zona pellucida and AWN 1-containing aggregates and separated proteins. AQN 1 spermadhesin effectively blocked the sperm binding to oocytes. These results suggest that under physiological conditions, the aggregated forms of seminal plasma proteins (DQH, AQN, AWN, PSP II) rather than the individual proteins might take part in coating the sperm surface, in sperm capacitation and in primary binding of spermatozoa to zona pellucida of the ovum.
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Affiliation(s)
- P Manásková
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague
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Abstract
Boar seminal plasma was separated into five protein fractions (I-V) (> 100, 55, 45, 30, 5-15 kDa) by gel chromatography on Sephadex G-75 SF at pH 7.2. RP-HPLC of protein fractions I-V and N-terminal sequencing of their individual components revealed that the high-molecular-weight aggregates consisted mainly of DQH sperm surface protein and AQN, AWN, PSP II spermadhesins, whereas fraction IV consisted of heterodimers of PSP spermadhesins only. Spermadhesins as monomers were present in seminal plasma in a very low amount. Aggregates containing the DQH protein and AWN spermadhesins as well as HPLC-separated monomeric proteins interacted strongly with acidic polysaccharides. The strongest interaction was observed between biotinylated glycoproteins of porcine zona pellucida and AWN 1-containing aggregates and separated proteins. PSP II interacted with some acidic polysaccharides, whereas the fraction IV corresponding to heterodimer PSP I/PSP II did not show any binding to acidic polysaccharides and zona pellucida. Aggregates containing AWN, AQN, DQH, PSP II proteins, and their separated monomeric forms (fractions I-III) interacted with phosphorylcholine. Fractions I-III showed affinity to cholesterol. Biotinylated aggregates containing AWN, AQN, DQH, and PSP proteins (fractions I-IV) bound stronger to boar epididymal spermatozoa than to ejaculated spermatozoa. These results suggest that under physiological conditions, the aggregates of seminal plasma proteins (DQH, AQN, AWN, PSP II) rather than the individual proteins might take part in coating the sperm surface, in sperm capacitation, and in primary binding of spermatozoa to zona pellucida of the ovum.
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Affiliation(s)
- V Jonáková
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague.
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Manásková P, Mészárosová A, Liberda J, Voburka Z, Tichá M, Jonáková V. Aggregated forms of heparin-binding and non-heparin-binding proteins of boar seminal plasma and their binding properties. Folia Biol (Praha) 2000; 45:193-201. [PMID: 10730888] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
Boar seminal plasma proteins were separated by affinity chromatography on immobilized heparin into two portions: heparin-binding (H+) and non-heparin-binding (H-) proteins. Gel chromatography of the H+ portion yielded four main protein fractions of >150, 45, 30 and 20 kDa, while that of the H- portion resulted in the separation into three main protein fractions of >150, 30 and 20 kDa. HPLC analysis and N-terminal sequencing used to characterize the composition of the protein fractions obtained by gel chromatography revealed that all consisted of low (12-16 kDa) molecular weight components: the H+ fraction consisted of DQH sperm protein, AQN and AWN spermadhesins whereas the H- fraction consisted of PSPI and PSPII spermadhesins. The high molecular weight values of fractions obtained by gel chromatography thus suggest that the proteins are present in boar seminal plasma in the form of aggregates. Interactions of individual boar seminal plasma proteins and their aggregates present in the H+ and H- fractions with acid polysaccharides were estimated.
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Affiliation(s)
- P Manásková
- Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Prague
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Liberda J, Tichá M, Zralý Z, Svecová D, Vezník Z. Interaction of bull, stallion and boar seminal plasma proteins and sperms with acidic polysaccharides. Folia Biol (Praha) 2000; 44:177-83. [PMID: 10732709] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
The interaction of seminal plasma proteins, sperms and detergent-released sperm proteins of three species with different types of acidic polysaccharides was studied. Heparin-binding activity of boar, bull and stallion seminal plasma proteins, sperms and sperm proteins was compared with their ability to interact with polysaccharides differing in the presence of the sulfate groups or in their saccharide moiety (chondroitin sulfate, dextran sulfate, fucoidan, hyaluronic acid). Bull seminal plasma proteins were characterized by higher affinity to heparin, fucoidan and dextran sulfate, while significant differences between different types of polysaccharides were detected in the case of boar proteins. Sperm protein interactions with acidic polysaccharides in bull and stallion were analogous to the binding of seminal plasma proteins. Bull and stallion seminal plasma proteins inhibited the interaction of corresponding sperm proteins with acidic polysaccharides.
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Affiliation(s)
- J Liberda
- Department of Biochemistry, Faculty of Natural Science, Charles University, Prague, Czech Republic
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Liberda J, Trnka T, Sejbal J, Jonáková V, Kraus M, Tichá M. Preparation of Biotinylated and FITC-Labelled Phosphorylcholine Poly(acrylamide) Derivatives and Their Application for Protein Ligand-Binding Studies. Chimia (Aarau) 1999. [DOI: 10.2533/chimia.1999.528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Biotin- and FITC-labelled water-soluble poly(acrylamide) derivatives of phosphorylcholine were prepared by coupling either maleinylated (a) or periodate-oxidized (b) L-glyceryl phosphorylcholine to poly-(acrylamide-allylamine) copolymer. Biotinylated phosphorylcholine poly(acrylamide) derivatives of both types were tested with Limulus polyphemus C-reactive protein and were used for the study of the phosphorylcholine-binding properties of boar seminal plasma proteins. Binding sites for phosphorylcholine on the surface of bull sperms were visualized using a FITC-labelled derivative of the ligand.
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