TOMM40 (Translocase of Outer Mitochondrial Membrane 40): TOMM40 is a crucial protein involved in mitochondrial function, specifically in the import of proteins into the mitochondria. As part of the TOM complex, TOMM40 facilitates the transport of nuclear-encoded proteins across the outer mitochondrial membrane, enabling them to perform essential functions within the mitochondria. Variants of TOMM40 are significantly associated with Alzheimer's disease, affecting both risk and age of onset. It is also linked to other neurodegenerative disorders and cognitive decline related to ageing.