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Mitochondrial Ribosome (Mitoribosome)
- Target
- Mitoribosome
- Molecular classification
- Ribosome, RNA-protein complex
01
Overview
The mitochondrial ribosome (mitoribosome) is a specialized ribosome located within mitochondria, responsible for translating proteins encoded by mitochondrial DNA (mtDNA). These proteins are essential components of the oxidative phosphorylation (OXPHOS) complexes involved in ATP production. Mitoribosomes are structurally and functionally distinct from both bacterial and cytoplasmic ribosomes, reflecting their unique evolutionary adaptation to synthesize hydrophobic membrane proteins. Mutations affecting mitoribosome components can lead to severe mitochondrial disorders due to impaired respiratory chain function, making it a potential drug target.
- Other names
- mt-ribosomeMitochondrial 55S ribosomeMitochondrial 78S ribosome
02
Mechanism of action
Inhibition of mitochondrial protein synthesis.
03
Biological functions
Mitochondrial protein synthesisTranslation of mtDNA-encoded mRNAsOxidative phosphorylation (OXPHOS) complex assemblyATP generation
04
Disease associations
Mitochondrial disordersDefective oxidative phosphorylationNeurodegenerative diseasesCardiomyopathyMyopathySensorineural hearing loss
05
Safety considerations
Off-target effects on cytoplasmic ribosomesMitochondrial toxicity
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