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Translocase of outer mitochondrial membrane 5 (TOMM5)
- Target
- TOMM5
- Molecular classification
- Other (component of protein complex), Mitochondrial protein import machinery, Not a receptor, enzyme, transporter, or ion channel itself, but an auxiliary α-helical transmembrane protein of the TOM complex
01
Overview
Translocase of outer mitochondrial membrane 5 (TOMM5/Tom5) is a small α-helical transmembrane protein that forms a stable part of the TOM (translocase of the outer membrane) complex, the primary protein-conducting channel of the mitochondrial outer membrane. TOMM5's main role is to mediate the transfer of precursor proteins from the mitochondrial surface import receptors (Tom20, Tom22) to the general import pore (formed by Tom40), playing a critical part in the import of nuclear-encoded mitochondrial preproteins. TOMM5 is essential for efficient mitochondrial protein import, assembly and stability of the core TOM complex, and normal mitochondrial biogenesis. In summary, this protein is a crucial, highly conserved element of mitochondrial function but is not currently a direct molecular drug target, receptor, or biomarker.
- Other names
- TOMM5 (human gene)Tom5 (yeast ortholog)Mitochondrial import receptor subunit TOM5Translocase of outer membrane 5
02
Mechanism of action
Not applicable (no known drugs or small molecule modulators of Tom5/TOMM5)
03
Biological functions
Protein translocation across mitochondrial outer membraneAssembly/stability of the TOM complexTransfer of mitochondrial preproteins from surface import receptors (Tom20, Tom22) to the Tom40 poreMitochondrial biogenesis
04
Disease associations
Other (mutations would be expected to impact mitochondrial protein import and function; no strong evidence for association with major diseases such as cancer or neurodegenerative disorders as a therapeutic target in the literature)
05
Safety considerations
Loss or dysfunction would likely result in impaired mitochondrial protein import and global mitochondrial dysfunction, leading to cell death or disease phenotypes if severely impaired in vivoHowever, this is theoretical—there are no clinical safety data relevant to drug targeting of TOMM5.
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