Mitochondria-targeted Probes for Imaging Protein Sulfenylation.

Mitochondria-targeted Probes for Imaging Protein Sulfenylation.
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DOI:
10.1038/s41598-018-24493-x
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发表时间:
2018-04-27
期刊:
影响因子:
4.6
通讯作者:
Furdui CM
Furdui CM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Holmila RJ;Vance SA;Chen X;Wu H;Shukla K;Bharadwaj MS;Mims J;Wary Z;Marrs G;Singh R;Molina AJ;Poole LB;King SB;Furdui CM

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Mitochondrial reactive oxygen species (ROS) are essential regulators of cellular signaling, metabolism and epigenetics underlying the pathophysiology of numerous diseases. Despite the critical function of redox regulation in mitochondria, currently there are limited methods available to monitor protein oxidation in this key subcellular organelle. Here, we describe compounds for imaging sulfenylated proteins in mitochondria: DCP-NEt2-Coumarin (DCP-NEt2C) and rhodamine-based DCP-Rho1. Side-by-side comparison studies are presented on the reactivity of DCP-NEt2C and DCP-Rho1 with a model protein sulfenic acid (AhpC-SOH) and mitochondrial localization to identify optimized experimental conditions for labeling and visualization of protein sulfenylation that would be independent of mitochondria membrane potential and would not impact mitochondrial function. These probes are applied to image mitochondrial protein sulfenylation under conditions of serum starvation and in a cell culture model of lung cancer exposed to ionizing radiation and silver nanoparticles, agents serving dual functions as environmental stressors and cancer therapeutics.
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