DAZAP2 is a multifunctional adaptor protein with distinct roles in cell cycle regulation and host defense. In unstressed cells, DAZAP2 promotes SIAH1-mediated polyubiquitination and degradation of the kinase HIPK2, acting as a loading factor for complex formation 1. Upon DNA damage, HIPK2 phosphorylates DAZAP2, triggering its nuclear translocation where it binds p53 at target gene promoters to selectively modulate DNA damage response genes, thereby limiting cell death 1. DAZAP2 also participates in stress granule formation 2 and regulates pluripotent stem cell differentiation through miR-302-mediated repression, controlling neural differentiation and cell proliferation 3. Recently, DAZAP2 has emerged as a potent pan-coronavirus restriction factor inhibiting viral entry by blocking virion fusion with endolysosomal and plasma membranes, while suppressing genomic RNA replication 4. In multiple myeloma pathogenesis, DAZAP2 is significantly downregulated through promoter hypermethylation of CREB binding sites, indicating tumor suppressor function [PMID:31034872; 55]. Additionally, DAZAP2 functions as an inhibitor of BMPR2 signaling in pulmonary hypertension 6. These findings establish DAZAP2 as a critical regulator of DNA damage responses, viral infection, and cellular differentiation with implications for cancer and infectious disease therapy.