Chemoenzymatic synthesis of PSGL-1 glycopeptides: sulfation on tyrosine affects glycosyltransferase-catalyzed synthesis of the O -glycan
作者:Kathryn M Koeller、Mark E.B Smith、Chi-Huey Wong
DOI:10.1016/s0968-0896(00)00041-9
日期:2000.5
PSGL-1 is the primary glycoproteinligand for P-selectin during the inflammatory response. Interestingly, the N-terminal sequence, containing both a site of tyrosine sulfation and an O-glycan, has been shown to bind to P-selectin with an affinity similar to full-length PSGL-1. To further characterize this system, the synthesis of glycopeptides from PSGL-1 was undertaken. The synthesis involved both solution-
Microbial Glycosyltransferases for Carbohydrate Synthesis: α-2,3-Sialyltransferase from <i>Neisseria </i><i>g</i><i>onorrheae</i>
作者:Masayuki Izumi、Gwo-Jenn Shen、Shirley Wacowich-Sgarbi、Takuji Nakatani、Oliver Plettenburg、Chi-Huey Wong
DOI:10.1021/ja011382r
日期:2001.11.1
exploitation of its substrate specificity and synthetic utility. Several potential acceptor substrates were synthesized in this study, including mono- and oligosaccharides, glycolipids, and glycopeptides and their sulfate derivatives. Some CMP-sialicacid derivatives with modification at the C-5 position were also prepared for evaluation as donor substrates. It was found that the enzyme exhibits a broader