Effects of glycosylation on fragments of tumour associated human epithelial mucin MUC1
作者:Peter Braun、G.Mark Davies、Michael R Price、Philip M Williams、Saul J.B Tendler、Horst Kunz
DOI:10.1016/s0968-0896(98)00092-3
日期:1998.9
The glycodecapeptide AcPAPGS(alpha GalNAc)T(alpha GalNAc)APPA and the C-terminal glycohexapeptide AcS(alpha GalNAc)T(alpha GalNAc)APPA have been synthesized by applying the N-terminal Fmoc group in combination with the heptyl ester cleavable by lipase-catalyzed hydrolysis at pH 7. The solution conformation of these MUC1-related synthetic glycopeptides and the control, non-glycosylated decapeptide AcPAPGSTAPPA have been investigated using NMR spectroscopy. The structural studies indicate that the glycohexapeptide has a folded structure in solution. For this molecule, unrestrained molecular dynamics has been used to confirm the presence of the observed solution through-space connections. The results indicate that the non-globular nature of MUC1 is due to both protein core sequence and the effect of carbohydrate. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.