Bromodomain adjacent to zinc finger domain protein 1B (BAZ1B)

Bromodomain adjacent to zinc finger domain protein 1B (BAZ1B) is a multifunctional nuclear protein that plays central roles in chromatin remodeling, transcriptional regulation, and the DNA damage response. BAZ1B is a regulatory subunit of several ATP-dependent chromatin-remodeling complexes (notably WICH and B-WICH), where it participates in maintaining nucleosome structure, facilitating access to DNA during replication, transcription, and repair. Unique among chromatin factors, BAZ1B displays intrinsic tyrosine kinase activity and can phosphorylate histone H2A.X at Tyr142, thereby influencing the cellular fate decision between DNA repair and apoptosis in response to genotoxic stress. BAZ1B is crucial for neural crest cell biology—its haploinsufficiency impairs neural crest induction and migration, contributing to the characteristic craniofacial and neurocognitive phenotypes of Williams-Beuren syndrome, a contiguous gene deletion disorder. It is also implicated in regulating the expression of hundreds of genes involved in neurogenesis, cardiovascular development, and metabolism, and abnormal BAZ1B function or expression contributes to oncogenic processes by promoting epithelial-to-mesenchymal transition and tumor cell invasion. While BAZ1B itself is not currently a direct drug target, its diverse roles in genome maintenance, chromatin state, and development make it a molecule of significant interest as both a disease biomarker and a potential candidate for future therapeutic strategies

Other names

Williams syndrome transcription factorTyrosine-protein kinase BAZ1BWBSCR10WBSCR9WSTFWilliams-Beuren syndrome chromosomal region 10 proteinWilliams-Beuren syndrome chromosomal region 9 proteinhWALp2

Not applicable (no established direct pharmacological targeting; potential indirect modulation via chromatin remodeling pathways or proteasome inhibition synergy)