The invention relates to A method of making a polypeptide comprising at least one N
ε
-methyl-lysine at a specific site in said polypeptide, said method comprising (a) genetically directing the incorporation of R—N
ε
-methyl-lysine into said polypeptide, wherein R comprises an auxiliary group; and (b) catalysing the removal of R from the polypeptide of (a). In particular the invention relates to such a method wherein genetically directing the incorporation of R—Nε-methyl-lysine into said polypeptide comprises arranging for the translation of a RNA encoding said polypeptide, wherein said RNA comprises an amber codon, and wherein said translation is carried out in the presence of an amber tRNA charged with R—N
ε
-methyl-lysine.
本发明涉及一种制备
多肽的方法,该
多肽在特定位点至少包含一种Nε-甲基-赖
氨酸,该方法包括(a)遗传地指导将R-Nε-甲基-赖
氨酸并入该
多肽中,其中R包括辅助基团;以及(b)催化将(a)中
多肽中的R去除。特别是,本发明涉及这样一种方法,其中遗传地指导将R-Nε-甲基-赖
氨酸并入该
多肽中包括安排翻译编码该
多肽的RNA的翻译,其中该RNA包括一种琥珀密码子,并且在琥珀tRNA带有R-Nε-甲基-赖
氨酸的存在下进行。