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Isotope-coded Chemical Reporter and Acid-cleavable Affinity Reagents for Monitoring Protein Sulfenic Acids

Overview
Specialty Biochemistry
Date 2011 May 24
PMID 21601453
Citations 27
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Abstract

We have developed an approach that allows relative quantification of protein sulfenic acids using a pair of light and heavy isotope labled probes, DAz-2 and d(6)-DAz-2. In conjunction with a new complementary acid-cleavable linker, Yn-ACL, we demonstrate that tagged peptides are successfully labeled, enriched, and fully characterized by LC-MS/MS analysis. Overall, this method can be applied to map sites of cysteine oxidation and compare protein sulfenylation in normal and disease states.

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