cocarboxylase
Definition
- Noun:
- A coenzyme important in cellular respiration: Cocarboxylase is a coenzyme form of thiamine (vitamin B1) that plays a crucial role in metabolic processes, particularly in the Krebs cycle (also known as the citric acid cycle) during cellular respiration. It acts as a catalyst for the decarboxylation of alpha-keto acids.
Usage Examples
- Noun:
- Cocarboxylase is essential for converting pyruvate into acetyl-CoA.
- A deficiency in thiamine can lead to reduced levels of cocarboxylase, impairing energy production.
Advanced Usage
- Biochemical Context: In biochemistry, "cocarboxylase" specifically refers to thiamine pyrophosphate (TPP), the active coenzyme form of vitamin B1. It is critical for the enzymatic reactions that release carbon dioxide from certain compounds.
- The enzyme pyruvate dehydrogenase requires cocarboxylase as a cofactor to function properly.
Variants and Related Words
- Thiamine pyrophosphate (TPP): The systematic biochemical name for cocarboxylase.
- Thiamine (Vitamin B1): The vitamin precursor from which cocarboxylase is synthesized in the body.
Synonyms
- Thiamine pyrophosphate (TPP): The direct synonym in biochemical terminology.
- Aneurin pyrophosphate: An older, less common term.
Related Phrases and Compounds
- Cocarboxylase activity: Refers to the functional capacity of this coenzyme in metabolic pathways.
- Researchers measured the cocarboxylase activity in the tissue sample.
Noun
-
a coenzyme important in respiration in the Krebs cycle
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