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Thiamine Pyrophosphate-Dependent Enzyme (TPP-dependent enzyme)
- Target
- TPP-dependent enzyme
- Molecular classification
- Enzyme
01
Overview
Thiamine pyrophosphate-dependent enzymes are a diverse family of enzymes that require thiamine pyrophosphate (TPP, also known as thiamine diphosphate or cocarboxylase) as an essential cofactor for their catalytic activity. TPP is the bioactive form of vitamin B1 and is present in all living systems, where it catalyzes several key biochemical reactions involved in energy metabolism and biosynthetic pathways. These enzymes play critical roles in carbohydrate metabolism, energy production, synthesis of neurotransmitters, antioxidants, and pentose sugars. Notable examples include pyruvate dehydrogenase complex, alpha-ketoglutarate dehydrogenase complex, branched-chain alpha-keto acid dehydrogenase complex, transketolase, and pyruvate decarboxylase.
- Other names
- Thiamine diphosphate-dependent enzymeCocarboxylase-dependent enzyme
02
Mechanism of action
Stabilizes carbanion intermediates during C–C bond cleavage/transfer
03
Biological functions
Carbohydrate metabolismATP synthesisRedox regulationBiosynthesisEnergy production
04
Disease associations
BeriberiMetabolic disordersNeurodegenerative diseases
05
Safety considerations
Vitamin B1 deficiency impairs enzymatic pathwaysInhibition may affect multiple metabolic pathways
06
Interacting drugs
Thiamine analogs
1 more in the full profile.
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