TMEM69 is a transmembrane protein localized to the mitochondrion with protein-binding capability 1. While its precise biochemical function remains undefined in the provided literature, TMEM69 has been identified as a candidate gene with potential disease relevance. In the context of diabetes pathogenesis, TMEM69 was identified as one of nine genes located in common Type 1 and Type 2 diabetes (T1D/T2D) genetic risk loci that harbor islet expression quantitative trait loci (eQTLs) in linkage disequilibrium with disease-associated variants 1. This suggests TMEM69 may participate in pancreatic islet networks critical for β-cell function, with disease-associated variants potentially contributing to β-cell dysfunction. Additionally, TMEM69 was evaluated as a potential epithelial-specific biomarker for colorectal cancer detection in peripheral blood, though results indicated that consistent colon epithelium mRNA markers are difficult to identify 2. At the genomic level, TMEM69 contains an SVA-F (SINE-VNTR-Alu) retrotransposable element in its 3' untranslated region, which may contribute to transcript regulation and generation of alternative isoforms 3. Overall, TMEM69 appears to function in metabolic and cellular contexts relevant to diabetes pathogenesis, though additional functional studies are needed to clarify its specific molecular mechanisms.