BAZ2A is an epigenetic regulator affecting transcription of ribosomal RNA. It is overexpressed in aggressive and recurrent prostate cancer, promoting cellular migration. Its bromodomain is characterized by a shallow and difficult-to-drug pocket. Here, we describe a structure-based fragment-growing campaign for the identification of ligands of the BAZ2A bromodomain. By combining docking, competition binding assays, and protein crystallography, we have extensively explored the interactions of the ligands with the rim of the binding pocket, and in particular ionic interactions with the side chain of Glu1820, which is unique to BAZ2A. We present 23 high-resolution crystal structures of the holo BAZ2A bromodomain and analyze common bromodomain/ligand motifs and favorable intraligand interactions. Binding of some of the compounds is enantiospecific, with affinity in the low micromolar range. The most potent ligand has an equilibrium dissociation constant of 7 μM and a good selectivity over the paralog BAZ2B bromodomain.

Identification of a BAZ2A-Bromodomain Hit Compound by Fragment Growing / Dalle Vedove, Andrea; Cazzanelli, Giulia; Batiste, Laurent; Marchand, Jean-Rémy; Spiliotopoulos, Dimitrios; Corsi, Jessica; D'Agostino, Vito Giuseppe; Caflisch, Amedeo; Lolli, Graziano. - In: ACS MEDICINAL CHEMISTRY LETTERS. - ISSN 1948-5875. - 13:9(2022), pp. 1434-1443. [10.1021/acsmedchemlett.2c00173]

Identification of a BAZ2A-Bromodomain Hit Compound by Fragment Growing

Dalle Vedove, Andrea;Cazzanelli, Giulia;Corsi, Jessica;D'Agostino, Vito Giuseppe;Lolli, Graziano
2022-01-01

Abstract

BAZ2A is an epigenetic regulator affecting transcription of ribosomal RNA. It is overexpressed in aggressive and recurrent prostate cancer, promoting cellular migration. Its bromodomain is characterized by a shallow and difficult-to-drug pocket. Here, we describe a structure-based fragment-growing campaign for the identification of ligands of the BAZ2A bromodomain. By combining docking, competition binding assays, and protein crystallography, we have extensively explored the interactions of the ligands with the rim of the binding pocket, and in particular ionic interactions with the side chain of Glu1820, which is unique to BAZ2A. We present 23 high-resolution crystal structures of the holo BAZ2A bromodomain and analyze common bromodomain/ligand motifs and favorable intraligand interactions. Binding of some of the compounds is enantiospecific, with affinity in the low micromolar range. The most potent ligand has an equilibrium dissociation constant of 7 μM and a good selectivity over the paralog BAZ2B bromodomain.
2022
9
Dalle Vedove, Andrea; Cazzanelli, Giulia; Batiste, Laurent; Marchand, Jean-Rémy; Spiliotopoulos, Dimitrios; Corsi, Jessica; D'Agostino, Vito Giuseppe; Caflisch, Amedeo; Lolli, Graziano
Identification of a BAZ2A-Bromodomain Hit Compound by Fragment Growing / Dalle Vedove, Andrea; Cazzanelli, Giulia; Batiste, Laurent; Marchand, Jean-Rémy; Spiliotopoulos, Dimitrios; Corsi, Jessica; D'Agostino, Vito Giuseppe; Caflisch, Amedeo; Lolli, Graziano. - In: ACS MEDICINAL CHEMISTRY LETTERS. - ISSN 1948-5875. - 13:9(2022), pp. 1434-1443. [10.1021/acsmedchemlett.2c00173]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/372800
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