The present invention relates to a kinase labeled at an amino acid naturally present or introduced in the P-loop of said kinase, wherein said labeling is effected at a free thiol or amino group of said amino acid and said label is (a) a thiol- or amino-reactive fluorophore sensitive to polarity changes in its environment; or (b) a thiol-reactive spin label, an isotope or an isotope-enriched thiol- or amino-reactive label, such that said fluorophore, spin label, isotope or isotope-enriched label does not inhibit the catalytic activity and does not interfere with the stability of the kinase. The invention furthermore relates to a method of screening for kinase inhibitors, a method of determining the kinetics of ligand binding and/or of dissociation of a kinase inhibitor and a method of generating mutated kinases suitable for the screening of kinase inhibitors using the kinase of the present invention.
本发明涉及一种激酶,该激酶被标记在天然存在或被引入该激酶P环的
氨基酸上,其中所述标记是在所述
氨基酸的游离
硫醇或
氨基上实现的,所述标记是(a)对其环境中极性变化敏感的
硫醇或
氨基反应荧光团;或 (b)
硫醇反应性自旋标签、同位素或富含同位素的
硫醇或
氨基反应性标签,使得所述荧光团、自旋标签、同位素或富含同位素的标签不抑制激酶的催化活性,也不干扰激酶的稳定性。本发明还涉及一种筛选激酶
抑制剂的方法、一种确定
配体结合动力学和/或激酶
抑制剂解离动力学的方法,以及一种利用本发明的激酶生成适合筛选激酶
抑制剂的突变激酶的方法。