Abstract

The secondary structure of the peptide segment around the carbohydrate-peptide linkage in glycoproteins was predicted by using the Chou and Fasman determination. Such a study was carried out for 9 O-glycosidically linkages and 28 N-glycosidically linkages. In the case of O-glycosidically linkages, the residue Ser or Thr involved in the linkage always belongs to a β-turn. In the case of N-glycosidically linkages, 19 out of the 28 Asn studied belong to a β-turn. A predicted determination concerning the whole protein moiety of 9 glycoproteins in order to obtain some information concerning the spatial organization of the entire glycoprotein was carried out also. It seems that carbohydrate moiety takes place outside the glycoprotein.

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