Cell permeable probes to image the presence and localization of kinases are important in studying their function and as diagnostic tools. Despite the central role of kinases as therapeutic targets, there are remarkably few probes available. Herein we report the discovery of a probe to image two therapeutically relevant kinases: EGFR and ERBB2. The probe was identified from a library based on a scaffold derived from the resorcyclic acid lactones that form a covalent adduct by reacting specifically with an unconserved cysteine in the nucleotide-binding site of the kinases. We demonstrated the utility of the newly discovered probe by imaging of EGFR localization and ERBB2 inhibition in live cells.
在研究激酶的功能和将其作为诊断工具时,对激酶的存在和定位进行成像的细胞渗透探针非常重要。尽管激酶作为治疗靶点发挥着核心作用,但可用的探针却少得可怜。在此,我们报告发现了一种探针,可以对两种与治疗相关的激酶进行成像:
表皮生长因子受体和 ERBB2。这种探针是从一个文库中发现的,该文库的基础是一种源自间
环酸内酯的支架,间
环酸内酯通过与激酶核苷酸结合位点中未保留的半胱
氨酸发生特异性反应而形成共价加合物。我们通过对活细胞中
表皮生长因子受体定位和ERBB2抑制作用的成像,证明了新发现探针的实用性。