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Translocase of outer mitochondrial membrane 7 (TOMM7)
- Target
- TOMM7
- Molecular classification
- Other (Subunit of membrane translocase complex), Mitochondrial import receptor subunit, Single-pass membrane protein
01
Overview
Translocase of outer mitochondrial membrane 7 (TOMM7) is a highly conserved, small, single-pass membrane protein and a core subunit of the translocase of the outer mitochondrial membrane (TOM) complex[1][2][3][4][5]. TOMM7 contributes to the assembly, stability, and function of the TOM complex, which acts as the primary gateway for cytosolic precursor proteins entering mitochondria. TOMM7 interacts closely with the main pore protein TOMM40 and receptor subunit TOMM22 to regulate the import process[3][4]. It forms part of the presequence-binding site and participates in transfer of proteins to the inner membrane machinery (TIM23 complex)[5]. In humans, TOMM7’s stabilizing role contrasts with its destabilizing functions observed in yeast, and its disruption can lead to severe metabolic and developmental disorders[4]. No drugs currently target TOMM7 directly, but it is essential for normal mitochondrial function.
- Other names
- TOM7TOMM07AD-014Tom7Translocase of outer membrane 7 kDa subunit homologGMPGSmitochondrial import receptor subunit TOM7 homologtranslocase of outer membrane 7 kDa subunit homologtranslocase of outer mitochondrial membrane 7 homolog
02
Biological functions
Essential component of protein import machinery at mitochondrial outer membraneRegulates assembly and stability of the TOM complexFacilitates import of nuclear-encoded proteins into mitochondriaInvolved in the transfer of precursor mitochondrial proteins to inner membrane translocase (TIM23 complex)Influences mitochondrial bioenergetics and phospholipid metabolismImplicated in regulation of mitochondrial protein import, possibly a negative regulator for certain subsets
03
Disease associations
Disease associations reported include rare autosomal recessive progeroid syndrome (growth retardation, progeroid features, and lipodystrophy associated with biallelic TOMM7 loss-of-function)Mitochondrial dysfunctions (by altering import/stability of mitochondrial proteins)No direct established role in common diseases such as cancer, inflammation, or neurodegeneration, beyond indirect mitochondrial impacts
04
Safety considerations
Loss-of-function variants can cause severe mitochondrial dysfunction, growth abnormalities, and syndromic disease (e.g., progeroid syndromes)Disruption of TOMM7 function alters mitochondrial protein import, bioenergetics, and membrane lipid metabolism, which could have broad cellular impacts
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