author_facet Tsuji, T
Irimura, T
Osawa, T
Tsuji, T
Irimura, T
Osawa, T
author Tsuji, T
Irimura, T
Osawa, T
spellingShingle Tsuji, T
Irimura, T
Osawa, T
Biochemical Journal
The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
Cell Biology
Molecular Biology
Biochemistry
author_sort tsuji, t
spelling Tsuji, T Irimura, T Osawa, T 0264-6021 Portland Press Ltd. Cell Biology Molecular Biology Biochemistry http://dx.doi.org/10.1042/bj1870677 <jats:p>Band-3 glycoprotein was purified from human blood-group-A erythrocyte membranes by selective solubilization and gel chromatography on Sepharose 6B in the presence of sodium dodecyl sulphate. The purified glycoprotein was subjected to hydrazinolysis in order to release the carbohydrate moiety. The released oligosaccharides were N-acetylated and applied to a column of DEAE-cellulose. Most of the band-3 oligosaccharides obtained were found to be free of sialic acids. When this neutral fraction was subjected to gel chromatography on a column of Sephadex G-50, two broad peaks were observed indicating that the band-3 glycoprotein was heterogeneous in the size of the oligosaccharide moieties. All fractions from gel chromatography were found to contain galactose, mannose, N-acetylglucosamine and fucose. The higher-molecular-weight (mol.wt. 3000-8000) peak consisted of fucose, mannose, galactose, N-acetylglucosamine and N-acetylgalactosamine in a molar proportion of 1.6:3.0:8.4:10.5:0.2. Most of these oligosaccharides were digested with a mixture of beta-galactosidase and beta-N-acetylhexosaminidase after alpha-L-fucosidase treatment to give a small oligosaccharide with the structure alpha Man2-beta Man-beta GlcNAc-GlcNAc. Methylation studies and limited degradation by nitrous acid deamination showed that the oligosaccharides contained the repeating disaccharide Gal beta 1→4GlcNAc beta 1→3, with branching points at C-6 of some of the galactose residues. These results indicate that a major portion of the band-3 oligosaccharide has a common core structure, with heterogeneity in the numbers of the repeating disaccharides, and contains fucose residues both in the peripheral portion and in the core portion. Haemagglutination tests were also carried out to determine the blood-group specificities of the glycoprotein and the results demonstrated the presence of both blood-group-H and I antigenic activities.</jats:p> The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes Biochemical Journal
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series Biochemical Journal
source_id 49
title The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_unstemmed The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_full The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_fullStr The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_full_unstemmed The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_short The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_sort the carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
topic Cell Biology
Molecular Biology
Biochemistry
url http://dx.doi.org/10.1042/bj1870677
publishDate 1980
physical 677-686
description <jats:p>Band-3 glycoprotein was purified from human blood-group-A erythrocyte membranes by selective solubilization and gel chromatography on Sepharose 6B in the presence of sodium dodecyl sulphate. The purified glycoprotein was subjected to hydrazinolysis in order to release the carbohydrate moiety. The released oligosaccharides were N-acetylated and applied to a column of DEAE-cellulose. Most of the band-3 oligosaccharides obtained were found to be free of sialic acids. When this neutral fraction was subjected to gel chromatography on a column of Sephadex G-50, two broad peaks were observed indicating that the band-3 glycoprotein was heterogeneous in the size of the oligosaccharide moieties. All fractions from gel chromatography were found to contain galactose, mannose, N-acetylglucosamine and fucose. The higher-molecular-weight (mol.wt. 3000-8000) peak consisted of fucose, mannose, galactose, N-acetylglucosamine and N-acetylgalactosamine in a molar proportion of 1.6:3.0:8.4:10.5:0.2. Most of these oligosaccharides were digested with a mixture of beta-galactosidase and beta-N-acetylhexosaminidase after alpha-L-fucosidase treatment to give a small oligosaccharide with the structure alpha Man2-beta Man-beta GlcNAc-GlcNAc. Methylation studies and limited degradation by nitrous acid deamination showed that the oligosaccharides contained the repeating disaccharide Gal beta 1→4GlcNAc beta 1→3, with branching points at C-6 of some of the galactose residues. These results indicate that a major portion of the band-3 oligosaccharide has a common core structure, with heterogeneity in the numbers of the repeating disaccharides, and contains fucose residues both in the peripheral portion and in the core portion. Haemagglutination tests were also carried out to determine the blood-group specificities of the glycoprotein and the results demonstrated the presence of both blood-group-H and I antigenic activities.</jats:p>
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author Tsuji, T, Irimura, T, Osawa, T
author_facet Tsuji, T, Irimura, T, Osawa, T, Tsuji, T, Irimura, T, Osawa, T
author_sort tsuji, t
container_issue 3
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container_title Biochemical Journal
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description <jats:p>Band-3 glycoprotein was purified from human blood-group-A erythrocyte membranes by selective solubilization and gel chromatography on Sepharose 6B in the presence of sodium dodecyl sulphate. The purified glycoprotein was subjected to hydrazinolysis in order to release the carbohydrate moiety. The released oligosaccharides were N-acetylated and applied to a column of DEAE-cellulose. Most of the band-3 oligosaccharides obtained were found to be free of sialic acids. When this neutral fraction was subjected to gel chromatography on a column of Sephadex G-50, two broad peaks were observed indicating that the band-3 glycoprotein was heterogeneous in the size of the oligosaccharide moieties. All fractions from gel chromatography were found to contain galactose, mannose, N-acetylglucosamine and fucose. The higher-molecular-weight (mol.wt. 3000-8000) peak consisted of fucose, mannose, galactose, N-acetylglucosamine and N-acetylgalactosamine in a molar proportion of 1.6:3.0:8.4:10.5:0.2. Most of these oligosaccharides were digested with a mixture of beta-galactosidase and beta-N-acetylhexosaminidase after alpha-L-fucosidase treatment to give a small oligosaccharide with the structure alpha Man2-beta Man-beta GlcNAc-GlcNAc. Methylation studies and limited degradation by nitrous acid deamination showed that the oligosaccharides contained the repeating disaccharide Gal beta 1→4GlcNAc beta 1→3, with branching points at C-6 of some of the galactose residues. These results indicate that a major portion of the band-3 oligosaccharide has a common core structure, with heterogeneity in the numbers of the repeating disaccharides, and contains fucose residues both in the peripheral portion and in the core portion. Haemagglutination tests were also carried out to determine the blood-group specificities of the glycoprotein and the results demonstrated the presence of both blood-group-H and I antigenic activities.</jats:p>
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spelling Tsuji, T Irimura, T Osawa, T 0264-6021 Portland Press Ltd. Cell Biology Molecular Biology Biochemistry http://dx.doi.org/10.1042/bj1870677 <jats:p>Band-3 glycoprotein was purified from human blood-group-A erythrocyte membranes by selective solubilization and gel chromatography on Sepharose 6B in the presence of sodium dodecyl sulphate. The purified glycoprotein was subjected to hydrazinolysis in order to release the carbohydrate moiety. The released oligosaccharides were N-acetylated and applied to a column of DEAE-cellulose. Most of the band-3 oligosaccharides obtained were found to be free of sialic acids. When this neutral fraction was subjected to gel chromatography on a column of Sephadex G-50, two broad peaks were observed indicating that the band-3 glycoprotein was heterogeneous in the size of the oligosaccharide moieties. All fractions from gel chromatography were found to contain galactose, mannose, N-acetylglucosamine and fucose. The higher-molecular-weight (mol.wt. 3000-8000) peak consisted of fucose, mannose, galactose, N-acetylglucosamine and N-acetylgalactosamine in a molar proportion of 1.6:3.0:8.4:10.5:0.2. Most of these oligosaccharides were digested with a mixture of beta-galactosidase and beta-N-acetylhexosaminidase after alpha-L-fucosidase treatment to give a small oligosaccharide with the structure alpha Man2-beta Man-beta GlcNAc-GlcNAc. Methylation studies and limited degradation by nitrous acid deamination showed that the oligosaccharides contained the repeating disaccharide Gal beta 1→4GlcNAc beta 1→3, with branching points at C-6 of some of the galactose residues. These results indicate that a major portion of the band-3 oligosaccharide has a common core structure, with heterogeneity in the numbers of the repeating disaccharides, and contains fucose residues both in the peripheral portion and in the core portion. Haemagglutination tests were also carried out to determine the blood-group specificities of the glycoprotein and the results demonstrated the presence of both blood-group-H and I antigenic activities.</jats:p> The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes Biochemical Journal
spellingShingle Tsuji, T, Irimura, T, Osawa, T, Biochemical Journal, The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes, Cell Biology, Molecular Biology, Biochemistry
title The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_full The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_fullStr The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_full_unstemmed The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_short The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_sort the carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
title_unstemmed The carbohydrate moiety of band-3 glycoprotein of human erythrocyte membranes
topic Cell Biology, Molecular Biology, Biochemistry
url http://dx.doi.org/10.1042/bj1870677