申请人:Brocchini Stephen
公开号:US20100239517A1
公开(公告)日:2010-09-23
The invention provides a novel process for conjugating a polymer, especially PEG, to a protein or peptide, which comprises reacting a polymeric conjugation reagent with a protein or peptide containing a polyhistidine tag under conditions such that conjugation occurs via said polyhistidine tag. The resulting conjugates are novel. The invention further relates to novel conjugates of the general formula (I) in which one of X and X′ represents a polymer, and the other represents a hydrogen atom; each Q independently represents a linking group; W represents an electron-withdrawing moiety or a moiety preparable by reduction of an electron-withdrawing moiety; or, if X′ represents a polymer, X-Q-W— together may represent an electron withdrawing group; and in addition, if X represents a polymer, X′ and electron withdrawing group W together with the interjacent atoms may form a ring; Z represents a protein or a peptide linked to A and B via respective histidine residues; A is a C
1-5
alkylene or alkenylene chain; and B is a bond or a C
1-4
alkylene or alkenylene chain.
本发明提供了一种新型的将聚合物(特别是PEG)与蛋白质或肽共轭的方法,其中包括使用聚合物共轭试剂与含有多组组氨酸标签的蛋白质或肽在一定条件下反应,从而通过该多组组氨酸标签进行共轭。所得到的共轭物是新型的。本发明还涉及一般式(I)的新型共轭物,其中X和X'中的一个代表聚合物,另一个代表氢原子;每个Q独立地表示连接基团;W表示带有电子吸引基团或可通过还原带有电子吸引基团而制备的基团;或者,如果X'代表聚合物,则X-Q-W-可以一起表示带有电子吸引基团;此外,如果X代表聚合物,则X'和带有电子吸引基团W的中间原子一起可以形成一个环;Z表示通过各自的组氨酸残基与A和B连接的蛋白质或肽;A是C1-5烷基或烯基链;B是键或C1-4烷基或烯基链。