GPATCH3 is a G-patch domain-containing protein with dual roles in developmental and immune regulation. Functionally, GPATCH3 acts as a transcriptional activator of the CXCR4 promoter, controlling neural crest cell migration essential for ocular and craniofacial development 1. Hypermorphic variants in GPATCH3 are associated with congenital glaucoma, with knockdown and overexpression studies in zebrafish demonstrating goniodysgenesis and ocular abnormalities 1. In innate immunity, GPATCH3 functions as a negative regulator of antiviral responses through distinct mechanisms. It directly interacts with mitochondrial VISA protein and disrupts assembly of the VISA/TRAF6/TBK1 signalosome, thereby inhibiting RIG-I-like receptor signaling and type I interferon production 2. Additionally, GPATCH3 regulates alternative splicing of immunoregulatory genes by enhancing the ATPase activity of RNA helicase DHX15, affecting splicing of genes including CXCR3, CD44, and FOXP3 3. Clinically, elevated GPATCH3 expression correlates with reduced infiltration of cytotoxic T cells and NK cells while enriching immunosuppressive populations, suggesting a role in tumor immune evasion 3. GPATCH3 has been implicated in hepatocellular carcinoma progression through gene fusion events 4, and preliminary associations with heart failure have been identified through machine learning analysis 5.