2-(2-Pyridyldithio-3-butenyl) glycosides react with carbohydrate-based thiols in a two-step process involving sulfenyl transfer followed by desulfurative 2,3-allylic rearrangement, promoted by either triphenylphosphine or silver nitrate, to give novel saccharide mimetics. In an alternative embodiment of the same chemistry anomeric thiols are coupled with carbohydrates derivatized in the form of 2-
Induction of Antibodies Directed Against Branched Core<i>O</i>-Mannosyl Glycopeptides-Selectivity Complimentary to the ConA Lectin
作者:Jin Yu、Oliver C. Grant、Christian Pett、Sabine Stahl、Robert J. Woods、Ulrika Westerlind
DOI:10.1002/chem.201605627
日期:2017.3.8
understanding of the biological roles of branched O‐mannosyl glycans is lacking in part due to the paucity of detection tools. In this work, a glycopeptide vaccine construct was synthesized and used to generate antibodies against branched O‐mannosyl glycans. Glycopeptide microarray screening revealed high selectivity of the induced antibodies for branchedglycan core structures presented on different peptide
哺乳动物蛋白 O-甘露糖基化由 α-吡喃甘露糖与 Ser 或 Thr 残基连接引发,包含一组参与肌肉和大脑发育的翻译后修饰 (PTM)。糖蛋白质组学方法和“SimpleCell”策略的最新进展使得糖蛋白和特定糖基化位点的快速鉴定成为可能。尽管取得了巨大进展,但迄今为止,哺乳动物O-甘露糖基糖蛋白组的生物学影响仍然很大程度上未知。仍然需要工具来研究O-甘露糖基聚糖的结构、作用和丰度。尽管O-甘露糖基分支已被证明与整合素依赖性细胞迁移相关,并且在脱髓鞘疾病(如多发性硬化症)中也发挥作用,但对分支O-甘露糖基聚糖的生物学作用的更广泛的了解仍然部分缺乏由于缺乏检测工具。在这项工作中,合成了糖肽疫苗构建体并用于生成针对支链O-甘露糖基聚糖的抗体。糖肽微阵列筛选显示,诱导抗体对不同肽主链上存在的支链聚糖核心结构具有高选择性,且未观察到与相关线性聚糖的交叉反应性。为了进行比较,甘露糖结合凝集素伴刀豆球蛋白