What does enolase mean?
Enolase is an enzyme that plays a central role in glycolysis, the nearly universal metabolic pathway by which cells convert glucose into usable energy. Specifically, it catalyzes the conversion of 2-phosphoglycerate into phosphoenolpyruvate, a critical step on the way to ATP production. Because glycolysis occurs in organisms from bacteria to humans, enolase is found throughout the living world, and variations of it serve as important research tools — fluoride's inhibition of bacterial enolase, for example, underlies its cavity-preventing effect in toothpaste. In medicine, particular tissue-specific forms of the enzyme carry diagnostic weight: neuron-specific enolase measured in blood can signal brain injury or neuroendocrine tumors. The word itself combines 'enol,' a chemical term for a certain alcohol structure, with '-ase,' the standard suffix for enzymes. Enolase appears only in technical and scientific writing, never in everyday conversation, but it is indispensable vocabulary for anyone reading about metabolism or clinical biochemistry.
nounAn enzyme that catalyzes the conversion of 2-phosphoglycerate to phosphoenolpyruvate in glycolysis, the pathway by which cells break down glucose for energy.
- (Biochemistry) An enzyme that catalyzes the dehydration of 2-phosphoglycerate to phosphoenolpyruvate in the glycolytic pathway.
- (Medicine) Any of the tissue-specific isoenzymes of enolase used as clinical markers, notably neuron-specific enolase (NSE) in assessing neuronal injury and neuroendocrine tumors.
"Because enolase is essential to glycolysis, it is present in virtually every living cell."
"Fluoride inhibits enolase by binding its magnesium cofactor, which is why it prevents bacterial acid production in dental plaque."
"Elevated serum levels of neuron-specific enolase can indicate damage to brain tissue after cardiac arrest."
Used chiefly when discussing distinct isoenzyme variants across tissues or species, not to count individual molecules.
"Mammals express three major enolases: the alpha, beta, and gamma isoforms."
The enzyme that powers every glucose-burning cell in your body was named after an obscure chemical quirk called an 'enol' — and doctors now use one form of it, neuron-specific enolase, as a blood marker of nerve-cell damage.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of enolase
Enolase was coined from 'enol' plus '-ase,' the standard German-derived suffix used for enzymes since the late nineteenth century. The name reflects that the enzyme acts on a substrate via an enol-form intermediate in glycolysis. The term arose in early twentieth-century biochemical literature as scientists worked out the steps of sugar metabolism. It shares its '-ase' ending with countless other enzyme names such as catalase and kinase.
How enolase is actually used
Strictly a scientific term, found almost exclusively in biochemistry, molecular biology, and clinical medicine. It takes no figurative or everyday use.
Easily confused with enolase
An enol is an organic compound with a hydroxyl group attached to a carbon-carbon double bond, whereas enolase is the enzyme named for its role in converting a substrate through an enol-type intermediate.