Chromosome 19 open reading frame 12 protein (C19orf12)

Chromosome 19 open reading frame 12 protein (C19orf12) is a highly conserved, small transmembrane protein expressed in mitochondria, endoplasmic reticulum, and their contact regions in human cells[1][7]. The gene is located on chromosome 19q12 and is ubiquitously expressed, with higher levels in brain, blood, and adipose tissue. Mutations in C19orf12 cause mitochondrial membrane protein-associated neurodegeneration (MPAN), also known as neurodegeneration with brain iron accumulation 4 (NBIA4), a rare, autosomal recessive (or rarely dominant) disorder characterized by iron accumulation in brain regions such as the globus pallidus and substantia nigra, leading to progressive spasticity, dystonia, parkinsonism, psychiatric symptoms, optic atrophy, and axonal neuropathy[1][3][8]. The protein may play roles in mitochondrial function, lipid metabolism, and neural development, but its exact molecular function remains unclear[1][3]. No current therapeutics or direct drug targets are known for C19orf12 deficiency, and management is limited to symptomatic treatment.

Other names

C19orf12MGC10922DKFZP762D096NBIA4MPANNeurodegeneration with brain iron accumulation 4Membrane protein-associated neurodegenerationNBIA3SPG43