Base-labile biologically relevant phosphopeptides can advantageously be synthesized under very mild conditions and without undesired side reactions by employing the heptyl (Hep) ester as C-terminal or the phenylacetamide (PhAc) as N-terminal enzyme-labile protecting group. The lipase-mediated saponification of the heptyl ester blocking function was successfully applied in the construction of a characteristic selectively phosphorylated hydroxyamino acid fragment of Raf-1 kinase, an important member of the so-called Ras signal transduction pathway.
通过采用庚酯(Hep)作为C-末端或苯乙酰胺(PhAc)作为N-末端酶不稳定保护基团,可以有利地在非常温和的条件下合成碱不稳定的
生物学相关
磷酸肽,并且没有不希望的副反应。
脂肪酶介导的庚酯阻断功能皂化已成功应用于构建 Raf-1 激酶的特征性选择性
磷酸化羟基
氨基酸片段,Raf-1 激酶是所谓的 Ras
信号转导途径的重要成员。