Method for selective derivatization of oligohistidine sequence of recombinant proteins
申请人:Melman Artem
公开号:US09441010B2
公开(公告)日:2016-09-13
Methods and compositions for the selective derivatization of a oligohistidine-tagged recombinant protein. A modifying compound comprised of an imidazole reactive group, a linker, and a ligating group is contacted with the recombinant protein, and a cooperative bond forms between the ligating group and the oligohistidine tag in the presence of a metal cation, and a covalent bond forms between the imidazole reactive group and an imidazole ring of the oligohistidine tag followed by the concomitant separation of the imidazole reactive group from the linker. Addition of a metal chelator results in the dissociation of the ligating group and the oligohistidine tag.
本发明涉及一种选择性衍生化寡组
氨酸标记的
重组蛋白的方法和组合物。该改性化合物包含
咪唑反应基团、连接剂和配基基团,与
重组蛋白接触时,在
金属阳离子存在下,配基基团与寡组
氨酸标记之间形成协同键,并且
咪唑反应基团与寡组
氨酸标记中的
咪唑环之间形成共价键,随后
咪唑反应基团与连接剂分离。添加
金属
螯合剂可导致配基基团与寡组
氨酸标记的解离。