Role of the galactosyl moiety of collagen glycopeptides for T-Cell stimulation in a model for rheumatoid arthritis
作者:Björn Holm、Syed M. Baquer、Lotta Holm、Rikard Holmdahl、Jan Kihlberg
DOI:10.1016/s0968-0896(03)00407-3
日期:2003.9
protected derivatives of beta-D-galactopyranosyl-5-hydroxy-L-lysine, in which HO-4 of galactose has been O-methylated or replaced by fluorine, have been prepared. The building blocks were incorporated at position 264 of the peptide fragment CII259-273 from type II collagen by solid-phase synthesis. The ability of these two glycopeptides, and two CII259-273 glycopeptides in which HO-4 of galactose was either
glycosyl donor. Best results were obtained with Fmoc-Hyl(Cbz)-OAll, which was glycosylated in 80% yield. Removal of the allyl group gave a β-d-galactosylated building block which was used in solid-phase synthesis of a glycopeptide from type II collagen. Such glycopeptides are required for studies of rheumatoid arthritis in a mouse that is transgenic for HLA-DR4, i.e. the class II MHC molecule associated with
9-BBN as a convenient protecting group in functionalisation of hydroxylysine
作者:Baquer M Syed、Tomas Gustafsson、Jan Kihlberg
DOI:10.1016/j.tet.2004.04.081
日期:2004.6
transformations such as N-Cbz protection, azido transfer, O-glycosylation, and O-silylation. Further manipulations led to improved methods for preparation of hydroxylysine and galactosylated hydroxylysine building blocks, suitable for direct use in peptide synthesis under standard Fmoc conditions.