YLPM1 (YLP motif containing 1) is a nuclear protein that plays diverse roles in cellular regulation and disease pathogenesis. The protein functions as a transcriptional regulator, controlling telomerase activity by binding to the TERT core promoter and mediating its down-regulation during embryonic stem cell differentiation [UniProt]. YLPM1 demonstrates significant clinical relevance across multiple disease contexts. In gastrointestinal stromal tumors (GISTs), recurrent inactivating YLPM1 mutations occur in 10.3% of patients, particularly enriched in high-risk/metastatic cases, where functional studies demonstrate that YLPM1 inactivation promotes tumor proliferation, growth, and oxidative phosphorylation 1. The gene shows evidence of positive selection in clonal hematopoiesis, with mutations correlating with increased risk of infection, death, and hematological malignancy 2. Pan-ancestry genomic studies identify YLPM1 as a significant risk factor for severe obesity, conferring approximately three-fold increased risk and showing brain-specific expression patterns 3. Additionally, YLPM1 demonstrates psychiatric disease associations 4 and cell-type specific expression in oligodendrocytes relevant to major depressive disorder 5. The protein's involvement spans from developmental regulation to cancer progression and metabolic disorders, highlighting its fundamental importance in cellular homeostasis.