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外文期刊>The biochemical journal
>Biochemical characterization of GSK1070916, a potent and selective inhibitor of Aurora B and Aurora C kinases with an extremely long residence time1
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Biochemical characterization of GSK1070916, a potent and selective inhibitor of Aurora B and Aurora C kinases with an extremely long residence time1
pThe Aurora kinases AurA, B and C are serine/threonine protein kinases that play essential roles in mitosis and cytokinesis. Among them, AurB is required for maintaining proper chromosome alignment, separation and segregation during mitosis, and regulating a number of critical processes involved in cytokinesis. AurB overexpression has been observed in a variety of cancer cell lines, and inhibition of AurB has been shown to induce tumour regression in mouse xenograft models. In the present study we report the enzymatic characterization of a potent and selective AurB/AurC inhibitor. GSK1070916 is a reversible and ATP-competitive inhibitor of the AurB–INCENP (inner centromere protein) enzyme. It selectively inhibits AurB–INCENP (iK/isubi/sub*=0.38±0.29 nM) and AurC–INCENP (iK/isubi/sub*=1.5±0.4 nM) over AurA–TPX2 (target protein for iXenopus/i kinesin-like protein 2) (iK/isubi/sub=490±60 nM). Inhibition of AurB–INCENP and AurC–INCENP is time-dependent, with an enzyme-inhibitor dissociation half-life of &480 min and 270±28 min respectively. The extremely slow rate of dissociation from the AurB and AurC enzymes distinguishes GSK1070916 from two other Aurora inhibitors in the clinic, AZD1152 and VX-680 (also known as MK-0457)./p
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机译:> Aurora激酶AurA,B和C是丝氨酸/苏氨酸蛋白激酶,在有丝分裂和胞质分裂中起重要作用。其中,AurB是维持有丝分裂过程中正确的染色体排列,分离和分离,以及调节许多参与胞质分裂的关键过程所必需的。在多种癌细胞系中均观察到AurB过表达,并且在小鼠异种移植模型中,AurB的抑制作用已显示可导致肿瘤消退。在本研究中,我们报告了一种有效的和选择性的AurB / AurC抑制剂的酶学表征。 GSK1070916是AurB–INCENP(内部着丝粒蛋白)酶的可逆性和ATP竞争性抑制剂。它选择性抑制AurB–INCENP( K i> i sub> * = 0.38±0.29&nbsp; nM)和AurC–INCENP( K i> i < /sub>*=1.5±0.4 nM)超过AurA–TPX2(非洲爪蟾 i>驱动蛋白样蛋白2的目标蛋白)( K i> i sub > = 490±60nM)。 AurB-INCENP和AurC-INCENP的抑制作用是时间依赖性的,其酶-抑制剂的解离半衰期分别为480min和270±28min。与AurB和AurC酶的解离速度极慢,使GSK1070916与临床上的其他两种Aurora抑制剂AZD1152和VX-680(也称为MK-0457)区分开来。 p>
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