C19orf12 is a mitochondrial protein whose loss-of-function mutations cause mitochondrial membrane protein-associated neurodegeneration (MPAN), a rare form of neurodegeneration with brain iron accumulation (NBIA) 12. C19orf12 is the third most common genetic cause of NBIA disorders 1. The protein localizes to mitochondria and lipid droplets, where it regulates mitochondrial fatty acid metabolism and adipocyte lipid storage capacity 3. Mechanistically, C19orf12 interacts with mitochondrial outer membrane translocase complexes and influences mitochondrial respiratory function 34. In disease contexts, C19orf12 dysfunction impairs mitochondrial respiration and calcium homeostasis, contributing to neurodegeneration with characteristic basal ganglia iron accumulation 2. C19orf12 mutations exhibit variable clinical presentations, including progressive movement disorders, spastic paraplegia, and ALS-like syndromes, reflecting complex genotype-phenotype relationships 5. Drosophila models with impaired C19orf12 orthologs recapitulate the neurodegenerative phenotype, validating the gene's pathogenic role 6. Currently, no causal therapy exists; treatment remains symptomatic, though induced pluripotent stem cell lines from MPAN patients provide platforms for mechanistic studies and therapeutic development 7.