Cysteine perthiosulfenic acid (Cys-SSOH): A novel intermediate in thiol-based redox signaling?
Cysteine perthiosulfenic acid (Cys-SSOH): A novel intermediate in thiol-based redox signaling?
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DOI:
10.1016/j.redox.2017.10.006
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发表时间:
2018-04
期刊:
影响因子:
11.4
通讯作者:
van der Vliet A
中科院分区:
文献类型:
--
作者:
Heppner DE;Hristova M;Ida T;Mijuskovic A;Dustin CM;Bogdándi V;Fukuto JM;Dick TP;Nagy P;Li J;Akaike T;van der Vliet A
The reversible oxidation of protein cysteine residues (Cys-SH) is a key reaction in cellular redox signaling involving initial formation of sulfenic acids (Cys-SOH), which are commonly detected using selective dimedone-based probes. Here, we report that significant portions of dimedone-tagged proteins are susceptible to cleavage by DTT reflecting the presence of perthiosulfenic acid species (Cys-SSOH) due to similar oxidation of hydropersulfides (Cys-SSH), since Cys-S-dimedone adducts are stable toward DTT. Combined studies using molecular modeling, mass spectrometry, and cell-based experiments indicate that Cys-SSH are readily oxidized to Cys-SSOH, which forms stable adducts with dimedone-based probes. We additionally confirm the presence of Cys-SSH within protein tyrosine kinases such as EGFR, and their apparent oxidation to Cys-SSOH in response NADPH oxidase activation, suggesting that such Cys-SSH oxidation may represent a novel, as yet uncharacterized, event in redox-based signaling.
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