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AlkFAA-alkyne is a Michael acceptor probe that was designed to label cysteines, but is not very effective. The compound can be used as a negative control when run with other cysteine-reactive probes. A method was developed using cysteine-reactive compounds to allow for unbiased analysis of proteomic data in quantitative applications . The method uses light or heavy labeling with the isotopically labelled desthiobiotin azide (isoDTB) tag for mass spectrometry analysis . Analysis then uses the isotopic tandem orthogonal proteolysis activity-based protein profiling (isoTOP-ABPP) workflow
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Profiling the proteome-wide selectivity of diverse electrophiles.
Zanon P RA, et al.
ChemRxiv : the preprint server for chemistry (2021)
Patrick R A Zanon et al.
Angewandte Chemie (International ed. in English), 59(7), 2829-2836 (2019-11-30)
Rapid development of bacterial resistance has led to an urgent need to find new druggable targets for antibiotics. In this context, residue-specific chemoproteomic approaches enable proteome-wide identification of binding sites for covalent inhibitors. Described here are easily synthesized isotopically labeled
Eranthie Weerapana et al.
Nature, 468(7325), 790-795 (2010-11-19)
Cysteine is the most intrinsically nucleophilic amino acid in proteins, where its reactivity is tuned to perform diverse biochemical functions. The absence of a consensus sequence that defines functional cysteines in proteins has hindered their discovery and characterization. Here we
Keriann M Backus et al.
Nature, 534(7608), 570-574 (2016-06-17)
Small molecules are powerful tools for investigating protein function and can serve as leads for new therapeutics. Most human proteins, however, lack small-molecule ligands, and entire protein classes are considered 'undruggable'. Fragment-based ligand discovery can identify small-molecule probes for proteins
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