Fransson, Lars-Åke;
Cöster, Lars;
Malmström, Anders;
Sjöberg, Ingrid
The copolymeric structure of pig skin dermatan sulphate. Characterization of d-glucuronic acid-containing oligosaccharides isolated after controlled degradation of oxydermatan sulphate
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Media type:
E-Article
Title:
The copolymeric structure of pig skin dermatan sulphate. Characterization of d-glucuronic acid-containing oligosaccharides isolated after controlled degradation of oxydermatan sulphate
Contributor:
Fransson, Lars-Åke;
Cöster, Lars;
Malmström, Anders;
Sjöberg, Ingrid
Published:
Portland Press Ltd., 1974
Published in:
Biochemical Journal, 143 (1974) 2, Seite 369-378
Description:
Selective periodate oxidation of unsubstituted l-iduronic acid residues in copolymeric dermatan sulphate chains was followed by reduction-hydrolysis or alkaline elimination. By this procedure the glucuronic acid-containing periods were isolated in oligosaccharide form; general formula: [Formula: see text] Further degradation of these oligosaccharides with chondroitinase-AC yielded three types of products: (a) sulphated trisaccharide containing an unsaturated uronosyl moiety in the non-reducing terminal and a C4 fragment in the reducing terminal, ΔUA-GalNAc-(-SO4)-R; (b) monosulphated, unsaturated disaccharide, ΔUA-GalNAc-SO4 when n is greater than or equal to 2; and (c) N-acetylgalactosamine with or without sulphate. Oligosaccharides containing a single glucuronic acid residue (n=1) comprised more than half of the glucuronic acid-containing oligosaccharides. The terminal N-acetylgalactosamine moiety of the shortest oligosaccharide was largely 4-sulphated, whereas higher oligosaccharides primarily contained 6-sulphated or unsulphated hexosamine moieties in the same position. Moreover, IdUA-SO4-containing oligosaccharides were encountered. These oligosaccharides were resistant to the action of chondroitinase-ABC.