An efficient method for the assembly of polyUb chains using auxiliary-modified Ub isomers is reported. This strategy takes advantages of auxiliary-mediated native chemical ligation between the distal Ub C-terminal hydrazide and the auxiliary of proximal Ub. Using removable protecting groups, Lys48-linked and Lys6-linked tri-Ub and even a mixed-linkage Lys6, Lys48-linked triUb in multimilligram quantities
报道了一种使用辅助修饰的Ub异构体组装polyUb链的有效方法。该策略利用了远端Ub C末端酰
肼与近端Ub的辅助物之间的辅助介导的天然
化学结扎的优势。使用可去除的保护基,制备了以毫克数计的Lys48连接的和Lys6连接的tri-Ub,甚至混合连接的Lys6,Lys48连接的triUb。这些结果表明,通过使用Ub异构体,该策略可产生所需长度和键合的天然多聚泛素链。