A process for labelling a target protein, such as a target enzyme, such as a deubiquitinating enzyme (DUB). The process comprises providing a probe-protein complex comprising a probe and the target protein. The probe comprises a recognition element and a warhead. The target protein comprises a cysteine residue and a recognition site. The recognition element is reversibly bound to the recognition site. A stimulus is applied to induce a radical reaction in the probe-protein complex to covalently bond the warhead to the cysteine residue, thereby labelling the target protein. This invention also resides in probes and probe-protein complexes for use in the process.
一种用于标记目标蛋白质的方法,例如目标酶,如去泛素酶(DUB)。该方法包括提供一个包含探针和目标蛋白质的探针-蛋白质复合物。探针包括一个识别元素和一个作用头。目标蛋白质包括一个半胱
氨酸残基和一个识别位点。识别元素可逆地结合到识别位点。施加刺激以在探针-蛋白质复合物中诱导自由基反应,使作用头与半胱
氨酸残基共价结合,从而标记目标蛋白质。该发明还包括用于该方法的探针和探针-蛋白质复合物。