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  • Title: SuFEx-enabled, agnostic discovery of covalent inhibitors of human neutrophil elastase.
    Author: Zheng Q, Woehl JL, Kitamura S, Santos-Martins D, Smedley CJ, Li G, Forli S, Moses JE, Wolan DW, Sharpless KB.
    Journal: Proc Natl Acad Sci U S A; 2019 Sep 17; 116(38):18808-18814. PubMed ID: 31484779.
    Abstract:
    Sulfur fluoride exchange (SuFEx) has emerged as the new generation of click chemistry. We report here a SuFEx-enabled, agnostic approach for the discovery and optimization of covalent inhibitors of human neutrophil elastase (hNE). Evaluation of our ever-growing collection of SuFExable compounds toward various biological assays unexpectedly revealed a selective and covalent hNE inhibitor: benzene-1,2-disulfonyl fluoride. Synthetic derivatization of the initial hit led to a more potent agent, 2-(fluorosulfonyl)phenyl fluorosulfate with IC50 0.24 μM and greater than 833-fold selectivity over the homologous neutrophil serine protease, cathepsin G. The optimized, yet simple benzenoid probe only modified active hNE and not its denatured form.
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