Combined Chemical and Enzymatic Synthesis of a <i>C</i>-Glycopeptide and Its Inhibitory Activity toward Glycoamidases
作者:Lai-Xi Wang、Mei Tang、Tadashi Suzuki、Ken Kitajima、Yasuo Inoue、Sadako Inoue、Jian-Qiang Fan、Yuan C. Lee
DOI:10.1021/ja9712027
日期:1997.11.1
A novel chemoenzymatic approach to synthesizing high-mannose-type N-glycopeptide and its C-linked glycopeptide analog is described. The synthesis consists of two steps: a chemical synthesis of GlcNAc-containing peptides and an enzymatic glycosyl transfer of Man9GlcNAc to the terminal GlcNAc in the peptides in an aqueous medium containing organic solvents. The essential enzyme used is an endo-β-N-a
描述了一种合成高甘露糖型 N-糖肽及其 C 连接糖肽类似物的新型化学酶法。该合成包括两个步骤:含 GlcNAc 肽的化学合成和 Man9GlcNAc 酶促糖基转移到含有有机溶剂的水性介质中肽的末端 GlcNAc。所用的基本酶是来自原孢节杆菌 (Endo-A) 的内切-β-N-乙酰氨基葡萄糖苷酶。这种方法应该普遍适用于天然和设计的高甘露糖型糖肽的合成。已经发现,虽然天然的高甘露糖型 N-糖肽 2 可以被糖酰胺酶快速水解 [通常称为 N-聚糖酶或,系统地称为肽-N4-(N-乙酰-β-d-氨基葡糖胺酰胺酶] ,