TIMM8A encodes a mitochondrial intermembrane space chaperone protein essential for importing multi-pass transmembrane proteins into the mitochondrial inner membrane 1. The protein protects hydrophobic precursors from aggregation and guides them through the intermembrane space, with the TIMM8-TIMM13 complex mediating import of proteins like TIMM23 and SLC25A12/ARALAR1 1. Loss-of-function mutations in TIMM8A cause Mohr-Tranebjaerg syndrome (MTS), a rare X-linked neurodegenerative disorder typically characterized by progressive hearing loss, dystonia, and visual impairment 12. However, clinical presentation shows variability, with some patients presenting dystonia and basal ganglia iron deposition without hearing loss 2. Mechanistically, TIMM8A mutations lead to mitochondrial dysfunction including reduced complex IV activity, decreased ATP synthesis, increased ROS generation, and mitochondrial fragmentation 1. The pathogenesis involves downstream reduction of CHCHD2, another mitochondrial protein essential for homeostasis, which can rescue the dysfunction when overexpressed 1. Beyond neurological disease, TIMM8A is overexpressed in various cancers, particularly breast cancer, where it correlates with poor prognosis and promotes proliferation, migration, and invasion through NF-κB signaling activation 34.