Gosset Molecular Classification
Enzyme Complex, Dehydrogenase Complex
Disease Roles
Branched-chain Alpha-ketoacid Dehydrogenase Complex Overview
The branched-chain alpha-ketoacid dehydrogenase complex (BCKDC) is a multi-enzyme complex located on the inner mitochondrial membrane. It catalyzes the oxidative decarboxylation of branched-chain alpha-ketoacids derived from leucine, isoleucine, and valine, a key irreversible step in BCAA catabolism. Activity is regulated by reversible phosphorylation, with phosphorylation by BCKD kinase (BDK) inhibiting activity and dephosphorylation by phosphatases restoring activity. Deficiency leads to Maple Syrup Urine Disease (MSUD) and has links to cancer and metabolic diseases.
Mechanism of Action
Modulation of phosphorylation/dephosphorylation of the complex subunits to regulate activity.
Biological Functions
Amino Acid Metabolism
Oxidative Decarboxylation
Energy Production
Disease Associations
Maple Syrup Urine Disease
Cancer
Cardiovascular Diseases
Insulin Resistance
Metabolic Syndrome
Safety Considerations
- Neurological Symptoms due to toxic metabolite buildup in MSUD
- Potential risks associated with altered BCAA metabolism in cancer and metabolic diseases
Associated Biomarkers
| Biomarker |
|---|
| BCAAs |
| α-Ketoacids |