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Mitochondrial Enzyme Complexes (ETC Complexes)
- Target
- ETC Complexes
- Molecular classification
- Enzyme Complex, Oxidoreductase, ATP Synthase
01
Overview
Mitochondrial enzyme complexes are large, multi-subunit protein assemblies embedded in the inner mitochondrial membrane. They play a central role in cellular energy production through oxidative phosphorylation (OXPHOS), which generates ATP. The main complexes are Complex I (NADH:ubiquinone oxidoreductase), Complex II (Succinate dehydrogenase), Complex III (Ubiquinol–cytochrome c oxidoreductase), Complex IV (Cytochrome c oxidase), and Complex V (ATP synthase). They transfer electrons, pump protons, and generate ATP, and their dysfunction can lead to various diseases.
- Other names
- Electron Transport Chain ComplexesOXPHOS ComplexesComplex I-VNADH:ubiquinone oxidoreductaseSuccinate dehydrogenaseUbiquinol–cytochrome c oxidoreductaseCytochrome c oxidaseATP synthase
02
Mechanism of action
Inhibition of electron transport chain, uncoupling of oxidative phosphorylation
03
Biological functions
Oxidative PhosphorylationElectron TransportProton PumpingATP SynthesisCellular RespirationEnergy Metabolism
04
Disease associations
Neurodegenerative diseaseMitochondrial diseaseAging-related disordersNeuromuscular disorders
05
Safety considerations
ROS generationImpaired energy productionDrug-induced mitochondrial toxicity
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