GPANK1 is a protein-binding molecule located in the MHC class III region on chromosome 6 that appears to play a role in immune-mediated diseases. While its specific molecular function remains incompletely characterized, GPANK1 variants have been identified as part of genetic interaction networks associated with celiac disease 1. The strongest CD interaction signal involved GPANK1/C6orf47 in conjunction with PRRC2A, with both genes containing variants associated with non-Hodgkin's lymphoma and early menopause, conditions that are comorbidities of celiac disease 1. GPANK1 has also emerged in transcriptome analyses as a differentially expressed SNP-related gene in the context of immune-mediated neuroinflammation, with PCR validation showing differential expression in epilepsy mouse models 2. This expression pattern was observed primarily in endothelial cells, microglia, and T cells, suggesting involvement in inflammatory responses 2. Additionally, a GPANK1 variant (rs7029 A>G in the 3' untranslated region) contributes to a class III MHC susceptibility haplotype associated with HIV-related Kaposi's sarcoma risk 3. These findings collectively suggest GPANK1 participates in immune-mediated pathogenic mechanisms, though direct functional characterization of the protein remains limited.