A traceable linker that is potentially applicable to identification of a target protein of bioactive compounds was developed. It enabled not only thiol-induced cleavage of the linker for enrichment of the target protein but also selective labelling to pick out the target from contaminated non-target proteins for facile identification.

Oxidative stress-responsive compounds are attracting significant attention in the field of medicinal chemistry and chemical biology. Here, we disclose the development of a hydrogen peroxide (H2O2)-responsive amino acid that induces peptide bond cleavage in the presence of H2O2 that closely relates to the oxidative stress. The H2O2-responsive amino acid possessing a boronate or boronic acid moiety was incorporated into a peptide using Fmoc-based solid-phase peptide synthesis or that with minor modification, respectively, and the peptide bond cleavage of the obtained peptide was successfully triggered by the addition of H2O2.

No abstract