Carvalho, LuísAlmeida, Vanessa TavaresBrito, José A.Lum, KennethOliveira, Tânia F.Guedes, Rita C.Gonçalves, LídiaLucas, Susana DiasCravatt, BenjaminArcher, MargaridaMoreira, Rui2024-01-222024-01-222020-03-16Carvalho LAR, Almeida VT, Brito JA, Lum KM, Oliveira TF, Guedes RC, et al. 3-oxo-β-sultam as a sulfonylating chemotype for inhibition of serine hydrolases and activity-based protein profiling. ACS Chem Biol [Internet]. 17 de abril de 2020;15(4):878–83. Disponível em: https://pubs.acs.org/doi/10.1021/acschembio.0c000901554-89291554-8937http://hdl.handle.net/10451/62011Copyright © 2020 American Chemical Society3-Oxo-β-sultams are four-membered ring ambident electrophiles that can react with nucleophiles either at the carbonyl carbon or at the sulfonyl sulfur atoms, and that have been reported to inhibit serine hydrolases via acylation of the active-site serine residue. We have developed a panel of 3-oxo-β-sultam inhibitors and show, through crystallographic data, that they are regioselective sulfonylating electrophiles, covalently binding to the catalytic serine of human and porcine elastases through the sulfur atom. Application of 3-oxo-β-sultam-derived activity-based probes in a human proteome revealed their potential to label disease-related serine hydrolases and proteasome subunits. Activity-based protein profiling applications of 3-oxo-β-sultams should open up new opportunities to investigate these classes of enzymes in complex proteomes and expand the toolbox of available sulfur-based covalent protein modifiers in chemical biology.engjournal article2023-02-27cv-prod-211893710.1021/acschembio.0c00090