申请人:Hu Qi-Ying
公开号:US10172948B2
公开(公告)日:2019-01-08
The invention provides improved methods to prepare protein conjugates from a ketone-modified protein. In one embodiment, the protein is prepared by linking two free cysteines by reaction with a 1,3-dihaloacetone or similar ketone-containing reactant, linking the sulfur atoms of the two cysteines together. The ketone inserted between the sulfur atoms is then used to form an oxime, 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, and the new ketone is used to form an oxime with a suitable payload molecule, thus conjugating the protein to a payload. The method provides improved reaction conditions for the oxime formation, whereby higher yields and improved product homogeneity are achieved.
本发明提供了用酮修饰蛋白质制备蛋白质共轭物的改进方法。在一个实施方案中,制备蛋白质的方法是通过与 1,3-二卤丙酮或类似的含酮反应物反应,将两个游离半胱氨酸的硫原子连接在一起。然后,插入硫原子间的酮被用来形成肟,从而将蛋白质与有效载荷连接起来。在另一个实施方案中,通过与 1,3-二卤丙酮或类似反应物反应,将两个半胱氨酸残基连接在一起,然后使用新的酮与合适的有效载荷分子形成肟,从而将蛋白质与有效载荷连接在一起。该方法为肟的形成提供了更好的反应条件,从而获得更高的产率和更好的产品均匀性。