including alpha-D-man-(1 --> 2)-D man and alpha-D-man-(1 --> 2)-alpha-D-man-(1 --> 2)-D-man were formed when a highly concentrated mannose solution was incubated in the presence of alpha-mannosidase from Aspergillus niger. alpha-D-Man-(1 --> 2)-D-man and alpha-D- man-(1 --> 2)-alpha-D-man-(1 --> 2)-D-man were isolated by activated carbon chromatography followed by high performance liquid chromatography
作者:José Danglad-Flores、Sabrina Leichnitz、Eric T. Sletten、A. Abragam Joseph、Klaus Bienert、Kim Le Mai Hoang、Peter H. Seeberger
DOI:10.1021/jacs.1c03851
日期:2021.6.16
of DNA, RNA, and peptides provides quickly and reliably important tools for biomedical research. Automated glycan assembly (AGA) is significantly more challenging, as highly branched carbohydrates require strict regio- and stereocontrol during synthesis. A new AGA synthesizer enables rapid temperature adjustment from −40 to +100 °C to control glycosylations at low temperature and accelerates capping
DNA、RNA 和肽的自动合成为生物医学研究提供了快速可靠的重要工具。自动聚糖组装 (AGA) 更具挑战性,因为高度支化的碳水化合物在合成过程中需要严格的区域和立体控制。新的 AGA 合成仪可实现从 -40 到 +100 °C 的快速温度调节,以在低温下控制糖基化,并使用升高的温度加速封端、保护基团去除和聚糖修饰。因此,临时保护基组合从两个正交基团扩展到四个正交基团,从而产生具有多达四个分支的寡糖。此外,可以制备硫酸化聚糖和未保护的聚糖。新设计将典型的偶联周期从 100 分钟减少到 60 分钟,同时扩大了可及聚糖的范围。