Target intelligence / Profile preview

Mitochondrial Respiratory Chain Complex II (SDH)

Target
SDH
Molecular classification
Enzyme, Oxidoreductase, Mitochondrial protein, Respiratory chain complex
01

Overview

Mitochondrial respiratory chain complex II, also known as succinate dehydrogenase (SDH), is a crucial enzyme complex located in the inner mitochondrial membrane. It serves as a key link between the tricarboxylic acid (TCA) cycle and the electron transport chain (ETC), playing an essential role in cellular energy metabolism. It is composed of four subunits: SDHA, SDHB, SDHC, and SDHD. Complex II catalyzes the oxidation of succinate to fumarate in the TCA cycle and the transfer of electrons from FADH2 to ubiquinone within the ETC, contributing to ATP production via oxidative phosphorylation. Mutations or dysfunctions in any subunit can lead to severe human diseases, including neurodegenerative disorders and various cancers.

Other names
Succinate dehydrogenaseComplex II
02

Mechanism of action

Inhibition of succinate dehydrogenase activity

03

Biological functions

Electron transportOxidative phosphorylationATP synthesisSuccinate oxidationUbiquinone reductionTricarboxylic acid cycle
04

Disease associations

Neurodegenerative diseaseCancerLeigh syndromeOptic atrophyInflammation-linked pathologiesMetabolic disorders
05

Safety considerations

Potential for off-target effects on mitochondrial functionDevelopment of resistanceImpact on cellular metabolism
06

Biomarkers

SDHA mutationsSDHB mutationsSDHC mutationsSDHD mutations

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