Substrates for Efficient Fluorometric Screening Employing the NAD-Dependent Sirtuin 5 Lysine Deacylase (KDAC) Enzyme
作者:Andreas S. Madsen、Christian A. Olsen
DOI:10.1021/jm300526r
日期:2012.6.14
employing sirtuin 5 (SIRT5). Furthermore, optimized protocols for facile kinetic investigations were developed, which should be valuable for enzyme kinetic investigations. Finally, these protocols were applied to a kinetic analysis of the inhibition of SIRT5 by suramin, a potent sirtuin inhibitor previously shown by X-ray crystallography to bind the substrate pocket of the human SIRT5 KDAC enzyme.
III类赖氨酸脱酰基酶(KDAC),也称为sirtuins,已成为治疗多种疾病的有趣药物靶标。为了更深入地了解受沉默调节蛋白影响的过程,开发单个同工酶的选择性小分子调节剂一直是一个长期的目标。然而,对于新颖的调节剂的发现,必不可少的是针对所关注目标的良好筛选方案和机理见解。因此,我们评估了七种人类瑟土因水解酶对一组荧光底物的活性。评价了常用的市售底物和设计用于解决赖氨酸翻译后修饰领域的最新发展的新型化学型。含N-琥珀酰赖氨酸的底物,可使用瑟土因5(SIRT5)进行高效且酶经济的筛选。此外,开发了用于简便动力学研究的优化方案,这对于酶动力学研究应该是有价值的。最后,将这些方案应用于苏拉明对SIRT5抑制的动力学分析,苏拉明是一种有效的瑟土因抑制剂,先前已通过X射线晶体学显示与人SIRT5 KDAC酶的底物口袋结合。