申请人:Hu Qi-Ying
公开号:US20150150998A1
公开(公告)日:2015-06-04
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.
本发明提供了改进的方法,用于从酮改性蛋白质制备蛋白质共轭物。在一种实施例中,通过使用1,3-二卤代酮或类似含酮反应物将两个游离半胱氨酸连接起来,将两个半胱氨酸的硫原子连接在一起,从而制备蛋白质。然后使用插入在硫原子之间的酮来形成肟,从而将蛋白质与有效载荷共轭。在另一种实施例中,通过使用1,3-二卤代酮或类似反应物将两个半胱氨酸残基连接在一起,并使用新的酮将肟与合适的有效载荷分子结合,从而将蛋白质与有效载荷共轭。该方法提供了改进的肟形成反应条件,从而实现更高的产率和更好的产物均一性。