Recently, new PD- genes, such as coiled-coil-helix-coiled-coil-helix domain-containing 2 (CHCHD2) 8 and vacuolar protein sorting-associated protein 35 (VPS35) 9, have been discovered and research is in progress to establish a connection between mitochondrial dysfunction and PD pathogenesis. The gene discussed is CHCHD2; the disease is Parkinson disease.