Conformation of Glycopeptides

Title: Conformation of Glycopeptides

Volume: 3 Issue: 7

Author(s): Laszlo Otvos Jr. and Mare Cudic

Affiliation:

Keywords: glycoproteins, n-glycosylation, o-glycosylation, mucin, secondary structure

Abstract: The presence of carbohydrate side-chains in native glycoproteins alters a number of biochemical properties of the peptide backbone. One of the most frequently studied questions is the conformationmodifying effect of sugar incorporation into asparagine, serine and threonine residues. When N-glycosylation modifies the conformation, the resulting structures are more ordered than the peptide chain without sugar addition. For O-glycopeptides the final conformations can be either more ordered or less ordered. In any event, only the innermost carbohydrates make contact with the peptide backbone. Through-space structural changes are mostly found downstream of the O-glycosylation site. In the repeat unit of epithelial mucin-1 protein, clustering of the carbohydrates results in an easily observable stabilization of the poly-proline II helix.

Cite this article as:

Otvos Jr. Laszlo and Cudic Mare, Conformation of Glycopeptides, Mini-Reviews in Medicinal Chemistry 2003; 3 (7) . https://dx.doi.org/10.2174/1389557033487809