POGZ is a chr1-regulating zinc finger protein with multiple roles in cellular and developmental processes. Functionally, POGZ promotes chr1 accessibility and active transcription of clustered synaptic genes 1, and it regulates gene expression through binding at euchromatic loci and regulatory elements 1. POGZ operates as a component of the CHAMP1 complex, which directs heterochromatin assembly and promotes homology-directed DNA repair of double-strand breaks 2. Additionally, POGZ regulates hemoglobin switching by silencing embryonic and fetal globin expression through BCL11A regulation 3. Diseases associated with POGZ include autism spectrum disorder (ASD) and intellectual disability (ID). POGZ is among the most prevalent genes for recurrent de novo mutations in ASD patients 4, and pathogenic variants have been identified in ID/ASD cohorts 5. Loss of POGZ function impairs normal neurodevelopment, with conditional knockout studies showing altered electrophysiological properties in both excitatory and inhibitory neurons 6. Clinically, understanding POGZ's role in chr1 regulation and gene expression provides potential therapeutic targets for neurodevelopmental disorders and insights into disease mechanisms. The gene's involvement in DNA repair and heterochromatin assembly further suggests relevance to genomic stability.