An object of the present invention is to provide a novel method for producing a peptide utilizing a ligation reaction in which ligation efficiency is excellent and side reactions to other functional groups in the peptide are hard to occur, in comparison with the conventional native chemical ligation methods utilizing the thiol auxiliary group. The present invention provides a method for producing a peptide which comprises a step of causing a first peptide and a second peptide to react in the presence of a reducing agent to obtain a ligated product of the first peptide and the second peptide, wherein the first peptide contains, at the C-terminal end, an amino acid derivative having a thioester group, and the second peptide contains, at the N-terminal end, a serine or threonine derivative having a thiol auxiliary group.
本发明的目的是提供一种新的肽生产方法,利用连接反应产生肽的效率高且与肽中其他功能基团发生副反应的可能性较小,与利用巯基辅助基团的传统
天然化学连接方法相比。本发明提供了一种生产肽的方法,包括使第一肽和第二肽在还原剂存在下反应以获得第一肽和第二肽的连接产物的步骤,其中第一肽在C-末端含有具有
硫酯基团的
氨基酸衍
生物,第二肽在N-末端含有具有巯基辅助基团的
丝氨酸或苏
氨酸衍
生物。