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- W2604773030 abstract "The sulfinic acid analog of aspartic acid, cysteine sulfinic acid, introduces a sulfur atom that perturbs the acidity and oxidation properties of aspartic acid. Cysteine sulfinic acids are often introduced in peptides and proteins by oxidation of cysteine, but this method is limited as all cysteine residues are oxidized and cysteine residues are often oxidized to sulfonic acids. To provide the foundation for the specific incorporation of cysteine sulfinic acids in peptides and proteins, we synthesized a 9-fluorenylmethyloxycarbonyl (Fmoc) benzothiazole sulfone analog. Oxidation conditions to generate the sulfone were examined and oxidation of the Fmoc-protected sulfide (3) with NbC in hydrogen peroxide provided the corresponding sulfone (4) in the highest yield and purity. Reduction with sodium borohydride generated the cysteine sulfinic acid (5) suggesting this approach may be an efficient method to incorporate a cysteine sulfinic acid in biomolecules. A model tripeptide bearing a cysteine sulfinic acid was synthesized using this approach. Future studies are aimed at using this method to incorporate cysteine sulfinic acids in peptide hormones and proteins for use in the study of biological function." @default.
- W2604773030 created "2017-04-14" @default.
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- W2604773030 date "2017-06-01" @default.
- W2604773030 modified "2023-09-23" @default.
- W2604773030 title "Generation of a cysteine sulfinic acid analog for incorporation in peptides using solid phase peptide synthesis" @default.
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- W2604773030 doi "https://doi.org/10.1016/j.bmcl.2017.04.019" @default.
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