直链的和合成(1→6) -支化的β-(1→4) - d -galactans,鼠李我描述了果胶多糖的侧链。该策略依赖于正戊烯基二糖的迭代偶联,随后是常见六糖核心的晚期糖基化。与共价接头反应并固定在N-羟基琥珀酰亚胺(NHS)修饰的玻璃表面上可以生成碳水化合物微阵列。聚糖阵列能够以高通量的方式研究蛋白质与碳水化合物的相互作用,本文通过mAb和CBM的结合研究证明了这一点。
Synthesis of β-1,4-Linked Galactan Side-Chains of Rhamnogalacturonan I
作者:Mathias C. F. Andersen、Stjepan K. Kračun、Maja G. Rydahl、William G. T. Willats、Mads H. Clausen
DOI:10.1002/chem.201602197
日期:2016.8.8
The synthesis of linear‐ and (1→6)‐branched β‐(1→4)‐d‐galactans, side‐chains of the pectic polysaccharide rhamnogalacturonan I is described. The strategy relies on iterative couplings of n‐pentenyl disaccharides followed by a late stage glycosylation of a common hexasaccharide core. Reaction with a covalent linker and immobilization on N‐hydroxysuccinimide (NHS)‐modified glass surfaces allows the generation
直链的和合成(1→6) -支化的β-(1→4) - d -galactans,鼠李我描述了果胶多糖的侧链。该策略依赖于正戊烯基二糖的迭代偶联,随后是常见六糖核心的晚期糖基化。与共价接头反应并固定在N-羟基琥珀酰亚胺(NHS)修饰的玻璃表面上可以生成碳水化合物微阵列。聚糖阵列能够以高通量的方式研究蛋白质与碳水化合物的相互作用,本文通过mAb和CBM的结合研究证明了这一点。
Exploring the synthetic potency of the first furanothioglycoligase through original remote activation
Thioglycosidic bonds are of utmost importance in biomolecules as their incorporation led to more stable glycomimetics with potential drug activities. Until now only chemical methods were available for their incorporation into glycofuranosyl conjugates. Herein, we wish to describe the use of the first furanothioglycoligase for the preparation of a great variety of thioaryl derivatives with moderate to excellent yields. Of great interest, a stable 1-thioimidoyl arabinofuranose, classically used in chemical glycosylation, was able to efficiently act as a donor through an original enzymatic remote activation mechanism. Study of the chemical structure as well as the nucleophilicity of the thiol allowed us to optimize this biocatalyzed process. As a consequence, this mutated enzyme constitutes an original, mild and eco-friendly method of thioligation.
Chemical synthesis of β-arabinofuranosyl containing oligosaccharides derived from plant cell wall extensins
作者:Sophon Kaeothip、Geert-Jan Boons
DOI:10.1039/c3ob40958a
日期:——
densely modified by oligo-arabinofuranosides linked to hydroxyproline residues. These glycoproteins have been implicated in many aspects of plant growth and development. Here, we describe the chemicalsynthesis of a tetrameric β(1–2)-linked arabinofuranoside that is capped by an α(1–3)-arabinofuranoside and a similar trisaccharide lacking the capping moiety. The challenging β(1–2)-linked arabinofuranosides
a pentasaccharide partialstructure was selected for total synthesis and subsequently coupled to a carrier protein to form a neoglycoconjugate. The allergy‐protective activity of arabinogalactan could be reproduced with the partialstructure in subsequent in vivo experiments. This is the first example of a successful simplification of arabinogalactan with a single partialstructure while retaining its