Chemical Probing of the Human Sirtuin 5 Active Site Reveals Its Substrate Acyl Specificity and Peptide-Based Inhibitors
作者:Claudia Roessler、Theresa Nowak、Martin Pannek、Melanie Gertz、Giang T. T. Nguyen、Michael Scharfe、Ilona Born、Wolfgang Sippl、Clemens Steegborn、Mike Schutkowski
DOI:10.1002/anie.201402679
日期:2014.9.26
sirtuin 5 is a weak deacetylase but a very efficient demalonylase and desuccinylase; however, its substrate acyl specificity has not been systematically analyzed. Herein, we investigated a carbamoyl phosphate synthetase 1 derived peptide substrate and modified the lysine side chain systematically to determine the acyl specificity of Sirt5. From that point we designed six potent peptide‐based inhibitors
Sirtuins是NAD +依赖性脱乙酰基酶,在代谢途径和应激反应中起着传感器的作用。在哺乳动物中,有七个亚型。线粒体sirtuin 5是弱的脱乙酰基酶,但非常有效的脱丙二酰酶和脱琥珀酰酶。然而,尚未对其底物酰基特异性进行系统分析。在本文中,我们研究了氨基甲酰磷酸合成酶1衍生的肽底物,并系统修饰了赖氨酸侧链,以确定Sirt5的酰基特异性。从那时起,我们设计了六种与NAD +相互作用的有效的基于肽的抑制剂装订袋。为了表征导致不同底物和抑制特性的相互作用细节,我们报道了与这些肽复合的Sirt5的几种X射线晶体结构。我们的结果揭示了Sirt5的酰基选择性及其分子基础,并使设计Sirt5的抑制剂成为可能。