[EN] METHODS FOR MAKING CONJUGATES FROM DISULFIDE-CONTAINING PROTEINS<br/>[FR] PROCÉDÉS POUR LA FABRICATION DE CONJUGUÉS À PARTIR DE PROTÉINES CONTENANT DU DISULFURE
申请人:NOVARTIS AG
公开号:WO2014083505A1
公开(公告)日:2014-06-05
The invention provides methods to prepare protein conjugates from proteins having at least two cysteines. In one embodiment, a protein with a disulfide linkage is reduced to provide two free cysteines for reaction with a 1,3-dihaloacetone or similar reactant, linking the sulfur atoms of the two cysteines together. The ketone inserted between the sulfur atoms is then used to form a Schiff base to an aminated payload molecule, thus conjugating the protein to a payload. In another embodiment, two cysteine residues are tied together by reaction with a 1,3-dihaloacetone or similar reactant. The linkage between the sulfur atoms in each case holds the protein or peptide in a constrained conformation, while also providing a convenient place for attaching a payload with good specificity and efficiency.
该发明提供了一种从至少含有两个半胱氨酸的蛋白质制备蛋白质共轭物的方法。在一个实施例中,将含有二硫键的蛋白质还原,以提供两个自由的半胱氨酸,用于与1,3-二卤代丙酮或类似试剂发生反应,将两个半胱氨酸的硫原子连接在一起。然后,插入在硫原子之间的酮基被用来与氨基负载分子形成席夫碱,从而将蛋白质与负载结合起来。在另一个实施例中,通过与1,3-二卤代丙酮或类似试剂发生反应,将两个半胱氨酸残基连接在一起。在每种情况下,硫原子之间的连接使蛋白质或肽以受限构象存在,同时还提供了一个方便的位置,用于连接具有良好特异性和效率的负载。