7BLB image
Entry Detail
PDB ID:
7BLB
Keywords:
Title:
BAZ2A bromodomain in complex with GSK4027 chemical probe
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
2021-01-18
Release Date:
2022-03-02
Method Details:
Experimental Method:
Resolution:
2.30 Å
R-Value Free:
0.22
R-Value Work:
0.19
R-Value Observed:
0.20
Space Group:
P 31 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Bromodomain adjacent to zinc finger domain protein 2A
Mutations:E1845H L1848S
Chain IDs:A
Chain Length:105
Number of Molecules:1
Biological Source:Homo sapiens
Ligand Molecules
Primary Citation
Reevaluation of bromodomain ligands targeting BAZ2A.
Protein Sci. 32 e4752 e4752 (2023)
PMID: 37574751 DOI: 10.1002/pro.4752

Abstact

BAZ2A promotes migration and invasion in prostate cancer. Two chemical probes, the specific BAZ2-ICR, and the BAZ2/BRD9 cross-reactive GSK2801, interfere with the recognition of acetylated lysines in histones by the bromodomains of BAZ2A and of its BAZ2B paralog. The two chemical probes were tested in prostate cancer cell lines with opposite androgen susceptibility. BAZ2-ICR and GSK2801 showed different cellular efficacies in accordance with their unequal selectivity profiles. Concurrent inhibition of BAZ2 and BRD9 did not reproduce the effects observed with GSK2801, indicating possible off-targets for this chemical probe. On the other hand, the single BAZ2 inhibition by BAZ2-ICR did not phenocopy genetic ablation, demonstrating that bromodomain interference is not sufficient to strongly affect BAZ2A functionality and suggesting a PROTAC-based chemical ablation as an alternative optimization strategy and a possible therapeutic approach. In this context, we also present the crystallographic structures of BAZ2A in complex with the above chemical probes. Binding poses of TP-238 and GSK4027, chemical probes for the bromodomain subfamily I, and two ligands of the CBP/EP300 bromodomains identify additional headgroups for the development of BAZ2A ligands.

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Primary Citation of related structures