Conformation of Glycopeptides

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

Journal Name: Mini-Reviews in Medicinal Chemistry

Volume 3 , Issue 7 , 2003

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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.

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

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Article Details

VOLUME: 3
ISSUE: 7
Year: 2003
Page: [703 - 711]
Pages: 9
DOI: 10.2174/1389557033487809
Price: $58

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