Chemoproteomic methods for detecting and profiling electrophilic post-translational modifications (PTMs) and oxidative PTMs in proteins are described. The methods including contacting a proteomic mixture with a probe having hydrazine and alkyne moieties or oxyamine and alkyne moieties to form a covalent linkage between the hydrazine or oxyamine moiety of the probe and the electrophilic PTM or oxidative PTM of the protein. The resulting alkyne-derivatized proteins are labelled with an azide modified tag via a click chemistry reaction. The labelled proteins can then be detected or profiled using techniques such as, for example, fluorescence imaging or mass spectrometry. Also described are protein conjugates having a covalent linkage formed by reaction of a hydrazine or oxyamine moiety of a probe with an electrophilic or oxidative PTM of a protein.
描述了检测和剖析蛋白质中亲电性翻译后修饰(
PTM)和氧化性
PTM 的
化学蛋白质组学方法。这些方法包括将蛋白质组混合物与具有
肼和炔分子或氧胺和炔分子的探针接触,以在探针的
肼分子或氧胺分子与蛋白质的亲电性
PTM 或氧化性
PTM 之间形成共价连接。通过点击
化学反应,用
叠氮修饰的标签标记所得到的炔衍化蛋白质。然后可以使用
荧光成像或质谱分析等技术检测或分析被标记的蛋白质。此外,还介绍了通过探针的
肼或氧胺分子与蛋白质的亲电或氧化
PTM 反应形成共价连接的蛋白质共轭物。