Mitochondrial import receptor subunit TOM22 homolog (TOMM22)

Mitochondrial import receptor subunit TOM22 homolog (TOMM22) is an integral outer mitochondrial membrane protein and a core component of the translocase of the outer mitochondrial membrane (TOM) complex, which serves as the primary gateway for protein import into mitochondria. TOMM22 functions as a receptor for preproteins carrying N-terminal mitochondrial targeting signals, working together with TOM20, TOM70, and the central pore-forming subunit TOM40. TOMM22 possesses a single transmembrane α-helical segment, with soluble domains exposed to the cytosol and the intermembrane space; its cytosolic domain has a three-helix bundle structure essential for preprotein recognition and translocation. TOMM22 also stabilizes the TOM complex and is required for its assembly and function. Altered TOMM22 activity or expression is linked to neurodegenerative and cardiac disease, and it is overexpressed in some cancers, making it of emerging interest for disease research and potential biomarker development.

Other names

TOMM22TOM22hTom22Translocase of outer membrane 22 kDa subunit homolog1C9-2MST065MSTP065mitochondrial import receptor subunit TOM22 homologmitochondrial import receptor Tom22

Not applicable (no drugs or drug classes with characterized mechanisms targeting TOMM22 directly). Mechanisms of action are currently research-based, focusing on protein import disruption or modulation in cellular/animal models.