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    • 27. 发明公开
    • METHODS FOR OXIME CONJUGATION TO KETONE-MODIFIED POLYPEPTIDES
    • 用于OXIME缀合至酮改性的多肽的方法
    • EP3074048A1
    • 2016-10-05
    • EP14815051.9
    • 2014-11-24
    • Novartis AG
    • HU, Qi-YingIMASE, Hidetomo
    • A61K47/48
    • C07K7/64A61K47/542A61K47/62A61K47/646A61K47/68A61K47/6803A61K47/6849C07K1/1133C07K2317/40
    • 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.
    • 本发明提供了从酮修饰的蛋白质制备蛋白质缀合物的改进方法。 在一个实施方案中,通过将两个游离半胱氨酸与1,3-二卤代丙酮或类似的含酮反应物反应,将两个半胱氨酸的硫原子连接在一起来制备蛋白质。 插入硫原子之间的酮然后用于形成肟,从而将蛋白质缀合到有效载荷上。 在另一个实施方案中,两个半胱氨酸残基通过与1,3-二卤代丙酮或类似的反应物反应而连接在一起,并且新的酮用于与合适的有效负载分子形成肟,由此将蛋白质偶联至有效负载。 该方法为肟形成提供改进的反应条件,由此获得更高的收率和改进的产物均匀性。