The invention is directed to methods and compositions for chemical ligation of a first component that includes a carboxythioester and a second component that includes an amino-functionalized compound bearing a branched side chain that includes a removable thiol auxiliary, to give a ligation product having an amide bond at the ligation site. The reactants of the invention are chemoselective and the thiol moiety is removable from the ligation product. Removal of the thiol can be exploited to generate a native side chain at the ligation site. The methods and compositions of the invention are particularly useful for ligation of peptides and polypeptides. The ligation system of the invention is applicable to a wide variety of molecules, and thus can be exploited to generate peptides, polypeptides and other amino acid containing polymers.
本发明涉及一种
化学连接的方法和组合物,用于将包括羧基
硫酯的第一组分和包括带有可移除巯基辅助剂的分支侧链的
氨基功能化合物的第二组分进行
化学连接,从而在连接位点上形成
酰胺键的连接产物。本发明的反应物具有
化学选择性,而巯基部分可从连接产物中移除。利用巯基的去除可以在连接位点上生成
天然侧链。本发明的方法和组合物特别适用于肽和
多肽的连接。本发明的连接系统适用于各种分子,因此可以用于生成肽,
多肽和其他含
氨基酸的
聚合物。