Virtual Fragment Screening Identification of a Quinoline-5,8-dicarboxylic Acid Derivative as a Selective JMJD3 Inhibitor
作者:Assunta Giordano、Federica del Gaudio、Catrine Johansson、Raffaele Riccio、Udo Oppermann、Simone Di Micco
DOI:10.1002/cmdc.201800198
日期:2018.6.20
The quinoline‐5,8 dicarboxylicacid scaffold has been identified by a fragment‐based approach as new potential lead compound for the development of JMJD3 inhibitors. Among them, 3‐(2,4‐dimethoxypyrimidin‐5‐yl)quinoline‐5,8‐dicarboxylicacid (compound 3) shows low micromolar inhibitory activity against Jumonji domain‐containing protein 3 (JMJD3). The experimental evaluation of inhibitory activity against
The 2-amine-9H-purine scaffold was identified as a weak bromodomain template and was developed via iterative structure based design into a potent nanomolar ligand for the bromodomain of human BRD9 with small residual micromolar affinity toward the bromodomain of BRD4. Binding of the lead compound 11 to the bromodomain of BRD9 results in an unprecedented rearrangement of residues forming the acetyllysine recognition site, affecting plasticity of the protein in an induced-fit pocket. The compound does not exhibit any cytotoxic effect in HEK293 cells and displaces the BRD9 bromodomain from chromatin in bioluminescence proximity assays without affecting the BRD4/histone complex. The 2-amine-9H-purine scaffold represents a novel template that can be further modified to yield highly potent and selective tool compounds to interrogate the biological role of BRD9 in diverse cellular systems.
Discovery of new erbB4 inhibitors: Repositioning an orphan chemical library by inverse virtual screening
作者:Assunta Giordano、Giovanni Forte、Luigia Massimo、Raffaele Riccio、Giuseppe Bifulco、Simone Di Micco
DOI:10.1016/j.ejmech.2018.04.018
日期:2018.5
Inverse Virtual Screening (IVS) is a docking based approach aimed to the evaluation of the virtual ability of a single compound to interact with a library of proteins. For the first time, we applied this methodology to a library of synthetic compounds, which proved to be inactive towards the target they were initially designed for. Trifluoromethyl-benzenesulfonamides 3-21 were repositioned by means of IVS identifying new lead compounds (14-16, 19 and 20) for the inhibition of erbB4 in the low micromolar range. Among these, compound 20 exhibited an interesting value of IC50 on MCF7 cell lines, thus validating IVS in lead repurposing. (C) 2018 Elsevier Masson SAS. All rights reserved.