title: Sulfated N-linked carbohydrate chains in porcine thyroglobulin.
abstract: N-linked carbohydrate chains of porcine thyroglobulin were released by the hydrazinolysis procedure. The resulting mixture of oligosaccharide-alditols was fractionated by high-voltage paper electrophoresis, the acidic fractions were further separated by high-performance liquid chromatography on Lichrosorb-NH2, and analyzed by 500-MHz 1H-NMR spectroscopy and, partially, by permethylation analysis. Of the acidic oligosaccharide-alditols, the following sulfated carbohydrate chains could be identified: NeuAc alpha 2----6Gal beta 1----4GlcNAc beta 1----2Man alpha 1----3[(SO3Na----3)Gal beta 1----4GlcNAc beta1----2-Mana alpha 1----6]Man beta 1----4GlcNAc beta 1----4[Fuc alpha 1----6]GlcNAc-ol and NeuAc alpha 2----6Gal beta 1----4(SO3Na----)0-1 GlcNAc beta 1----2-Man alpha 1----3[NeuAc alpha 2----6Gal beta 1----4(SO3Na----6)1-0GlcNAc beta 1----2Man alpha 1----6]Man beta 1----4GlcNAc beta 1----4[Fuc alpha 1----6]GlcNAc- ol. The sulfated structural elements for porcine thyroglobulin form novel details of N-linked carbohydrate chains. They contribute to the fine structure of these oligosaccharides and are another type of expression of microheterogeneity.
authors.affiliation: Department of Bio-Organic Chemistry, Utrecht University, The Netherlands.
authors.forename: J P
authors.initials: JP
authors.lastname: Kamerling
authors.forename: I
authors.initials: I
authors.lastname: Rijkse
authors.forename: A A
authors.initials: AA
authors.lastname: Maas
authors.forename: J A
authors.initials: JA
authors.lastname: van Kuik
authors.forename: J F
authors.initials: JF
authors.lastname: Vliegenthart
mesh_terms: D000818:Animals; D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D009844:Oligosaccharides / Q000302:isolation & purification; D013464:Sulfuric Acids / Q000032:analysis*; D013552:Swine; D013954:Thyroglobulin
chemical_list: D009844:Oligosaccharides; D013464:Sulfuric Acids; D013954:Thyroglobulin