Water soluble reagents and methods for the formation of an amide bond between a phosphinothioester and an azide in an aqueous medium. The phosphinothioester is generated using a water-soluble phosphinothiol reagent. This reaction allows formation of an amide bond between a wide variety of chemical species including amino acids, peptides or protein fragments in an aqueous solution. Of particular interest, this reaction allows for the formation of an amide bond in a physiological setting. In a specific embodiment, this invention provides reagents and methods for peptide ligation in an aqueous medium. The reaction eliminates the need for a cysteine residue and is traceless leaving no residual atoms in the ligated peptide product.
水溶性试剂和方法用于在
水介质中形成
磷硫酸酯和
叠氮基之间的酰胺键。
磷硫酸酯是使用
水溶性
磷硫醇试剂生成的。该反应允许在
水溶液中形成各种
化学物种之间的酰胺键,包括
氨基酸、肽或蛋白质片段。特别值得注意的是,该反应允许在生理环境中形成酰胺键。在一个特定实施例中,该发明提供了在
水介质中进行肽连接的试剂和方法。该反应消除了对半胱
氨酸残基的需求,并且是无痕迹的,不会在连接的肽产品中留下残留原子。