Synthesis and biological activity of some glucose-enkephalin conjugates.
Two O-glucopeptides, H-Tyr(beta-D-Glc)-Gly-Gly-Phe-OH(10) and H-Tyr(beta-D-Glc)-Gly-Gly-Phe-Leu-OH (11), having the amino acid sequence of enkephalin, were synthesized to determine the influence of the carbohydrate molecule on the biological activity and conformation of these opioid peptides. The synthesis were carried out in a stepwise and/or direct manner by fusing the activated O-glucosylpseudourea intermediate with suitably protected amino acid or peptide derivatives, followed by hydrogenolytic removal of protecting groups. The pure compounds were tested for opiate-like activity by using the guinea pig ileum (GPI) and mouse vas deferens (MVD) preparations.
Department of Organic Chemistry and Biochemistry, Ruder Boskovic Insitute, Zagreb, Yugoslavia.
L
L
Varga
S
S
Horvat
C
C
Lemieux
P W
PW
Schiller
D000818:Animals; D001681:Biological Assay; D004745:Enkephalins; D005947:Glucose; D009119:Muscle Contraction / Q000187:drug effects; D010455:Peptides / Q000138:chemical synthesis*; D013329:Structure-Activity Relationship
D004745:Enkephalins; D010455:Peptides; D005947:Glucose