申请人:——
公开号:US20040138412A1
公开(公告)日:2004-07-15
The invention is directed to methods and compositions for chemical ligation of components comprising a first component having a carboxythioester, and preferable an &agr;-carboxythioester, moiety and a second component having an N-substituted, and preferably an N&agr;-substituted, 2 or 3 carbon chain alkyl or aryl thiol to give a ligation product having an N-substituted amide bond at the ligation site. The reactants of the invention are chemoselective, and the alkyl or aryl thiol moiety is removable from the ligation product. Removal of the alkyl or aryl thiol gives a native amide bond 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 having a native amide bond at the ligation site.
本发明涉及一种化学连接的方法和组合物,其中第一组分具有羧基硫酯基团,首选为α-羧基硫酯基团,第二组分具有N-取代,首选为N-α-取代,2或3碳链烷基或芳基硫醇,以在连接位点形成具有N-取代酰胺键的连接产物。本发明的反应物具有化学选择性,烷基或芳基硫醇基团可从连接产物中去除。去除烷基或芳基硫醇可在连接位点形成天然酰胺键。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,因此可用于生成具有连接位点处天然酰胺键的肽、多肽和其他含氨基酸的聚合物。