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  • Title: Evidence for the presence of the trimannosyl-di-N-acetylchitobiose core in the carbohydrate chains of human-parotid, proline-rich glycoprotein.
    Author: Boersma A, Lhermitte M, Lamblin G, Degand P.
    Journal: Carbohydr Res; 1981 Sep 16; 95(2):227-36. PubMed ID: 7296562.
    Abstract:
    The carbohydrate chains of the human-parotid, proline-rich glycoprotein are linked through a single type of carbohydrate-peptide linkage (asparaginyl-N-acetylglucosamine). The structure of the internal part of the carbohydrate chains, determined by chemical, enzymic, and g.l.c.--m.s. methods, includes the trimannosyl-di-N-acetylchitobiose core involved in the carbohydrate-peptide linkage. Furthermore, an L-fucose residue is linked to the 2-acetamido-2-deoxy-D-glucosyl residue linked to the L-asparaginyl residue. The sequence of the peripheral part of the chains has also been determined as alpha-L-Fuc rho leads to beta-D-Gal rho leads to beta-D-Glc rho NAc leads to alpha-D-Man rho, suggesting a double-branched, basic carbohydrate structure.
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