Development of Second Generation Activity-Based Chemical Probes for Sirtuins.

Development of Second Generation Activity-Based Chemical Probes for Sirtuins.
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DOI:
10.3390/molecules26010011
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发表时间:
2020-12-22
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Cen Y
Cen Y
中科院分区:
其他
文献类型:
--
作者:
Curry AM;Barton E;Kang W;Mongeluzi DV;Cen Y

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NAD+(烟酰胺腺嘌呤二核苷酸)依赖的蛋白质去乙酰化酶,即sirtuins,是重要的细胞适应蛋白,在低热量条件下改变细胞生理。它们被认为是调节热量限制的有益效果,以延长寿命和改善健康状况。为了更好地了解sirtuin在各种生物过程中的作用,人们非常需要新的化学探针。我们开发了一组非常简单的基于活性的化学探针,用于研究复杂天然蛋白质组中活性sirtuin的含量。这些探针含有一个硫酰基赖氨酸弹头,一个重氮嘧啶光亲和标签,以及一个末端炔生物正交官能团。与含二苯甲酮的探针相比,这些新探针显示出更高的标记效率和灵敏度,缩短辐照时间,减少背景信号。它们被应用于单个重组蛋白、蛋白混合物和全细胞裂解物的标记。这些细胞渗透性小分子探针也使sirtuin活性变化的细胞成像成为可能。总之,我们的研究为干扰不同sirtuin亚型的活性提供了新的化学生物学工具和未来的药物发现策略。
NAD+ (nicotinamide adenine dinucleotide)-dependent protein deacylases, namely, the sirtuins, are important cell adaptor proteins that alter cell physiology in response to low calorie conditions. They are thought to mediate the beneficial effects of calorie restriction to extend longevity and improve health profiles. Novel chemical probes are highly desired for a better understanding of sirtuin’s roles in various biological processes. We developed a group of remarkably simple activity-based chemical probes for the investigation of active sirtuin content in complex native proteomes. These probes harbor a thioacyllysine warhead, a diazirine photoaffinity tag, as well as a terminal alkyne bioorthogonal functional group. Compared to their benzophenone-containing counterparts, these new probes demonstrated improved labeling efficiency and sensitivity, shortened irradiation time, and reduced background signal. They were applied to the labeling of individual recombinant proteins, protein mixtures, and whole cell lysate. These cell permeable small molecule probes also enabled the cellular imaging of sirtuin activity change. Taken together, our study provides new chemical biology tools and future drug discovery strategies for perturbing the activity of different sirtuin isoforms.
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