发展了一种基于毛细管电泳(CE)-激光诱导荧光(LIF)检测的多个细胞内源激酶的抑制剂平行筛选及选择性评价方法.CE高效的分离能力和LIF检测器的高选择性,使得同时测试多个胞内激酶的活性成为可能.共4种细胞系、3种特异性蛋白激酶底物肽、2种选择性蛋白激酶抑制剂和1种非选择性蛋白激酶抑制剂用于方法的建立.特异性底物肽与细胞裂解液混合后孵育,被其相应的激酶选择性地磷酸化,利用CE-LIF分离检测磷酸化产物和底物肽.同时测定一个抑制剂对几种蛋白激酶的抑制活性,用于评价抑制剂的选择性.与传统的单靶标筛选模式相比,这种基于细胞裂解液的多靶标筛选方法能提供更多的信息,更加高效,且细胞裂解液作为一种廉价的激酶来源大大降低了筛选成本.
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