Deubiquitinating enzyme (DUB) probes are provided that resemble native diubiquitin (diUB) with a similar linkage size and that may contain a Michael acceptor for trapping the DUB active-site cysteine. For example, both K63- and K48-linked diubiquitin probes are generated using a facile chemical ligation method, utilizing the linker compound 3-(2-(bromomethyl)-1,3-dioxolan-2-yl)prop-2-en-1-amine. The diUb probes are capable of labelling DUBs from different families and may be employed to reveal intrinsic linkage specificities of DUBs.
提供了类似于天然二泛素(diUB)的去泛素酶(DUB)探针,具有类似的连接大小,并且可能含有用于捕获DUB活性位点半胱
氨酸的Michael受体。例如,使用简便的
化学连接方法生成了K63-和K48-连接的二泛素探针,利用连接剂化合物3-(2-(bromomethyl)-1,3-dioxolan-2-yl)prop-2-en-1-amine。这些diUb探针能够标记不同家族的DUB,并可用于揭示DUB的固有连接特异性。