Chemoselective Proteomics, Zinc Fingers, and a Zinc(II) Model for H2S Mediated Persulfidation
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ABSTRACT: The gasotransmitter hydrogen sulfide (H2S) is thought to be involved in the post-translational modification of cysteine residues to produce reactive persulfides. A persulfide-specific chemoselective proteomics approach with mammalian cells has identified a broad range of zinc finger (ZF) proteins as targets of persulfidation. Parallel studies with isolated ZFs show that persulfidation is mediated by Zn(II), O2, and H2S, with intermediates involving oxygen- and sulfur-based radicals detected by mass spectrometry and optical spectroscopies. A small molecule Zn(II) complex exhibits analogous reactivity with H2S and O2, giving a persulfidated product. These data show that Zn(II) is not just a biological structural element, but also plays a critical role in mediating H2S-dependent persulfidation. ZF persulfidation appears to be a general post-translational modification and a possible conduit for H2S signaling. This work has implications for our understanding of H2S-mediated signaling and the regulation of ZFs in cellular physiology and development.
INSTRUMENT(S): Orbitrap Eclipse
ORGANISM(S): Mus Musculus (mouse)
TISSUE(S): Embryonic Fibroblast, Cell Culture
SUBMITTER: Thibaut Vignane
LAB HEAD: Milos Filipovic
PROVIDER: PXD041310 | Pride | 2024-06-23
REPOSITORIES: Pride
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