| acetyl transacylase | Enzyme transferring acetyl from acetyl-CoA to acyl carrier protein and releasing CoA to begin fatty acid synthesis. Synonym: acetyl transacylase. (05 Mar 2000) |
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| acetyl value | The milligrams of KOH required to neutralise the acetic acid produced by the hydrolysis of 1 g of acetylated fat; a measure of the hydroxy acids present in glycerides; notably high in castor oil. (05 Mar 2000) |
| acetyl-activating enzyme | A ligase that catalyses the reaction of acetate and CoA and ATP to form AMP, pyrophosphate, and acetyl-CoA. A key step in the activation of acetate. Synonym: acetate thiokinase, acetate-CoA ligase, acetyl-activating enzyme, acetyl-CoA synthetase. (05 Mar 2000) |
| acetyl-CoA | <enzyme> Condensation product of coenzyme A and acetic acid, symbolised as CoAS~COCH3; intermediate in transfer of two-carbon fragment, notably in its entrance into the tricarboxylic acid cycle and in fatty acid synthesis. This coenzyme plays a huge role in intermediary metabolism, in which cells synthesise, break down or use nutrient molecules for energy production, growth, etc. Acetyl-coenzyme A synthase is found in bacteria and plants and catalyses the reaction in which acetate enters metabolic pathways and forms acetyl-coenzyme A. Synonym: acetyl-coenzyme A, active acetate. (05 Mar 2000) |
| acetyl-CoA - lysine N6-acetyltransferase | <enzyme> First step in catabolism of lysine by saccharomyces cerevisiae Registry number: EC 2.3.1.- Synonym: accoa lysine acetyltransferase, lysine n-6-acetyltransferase, lyc1 gene product (26 Jun 1999) |
| acetyl-CoA acetyltransferase | An acetyltransferase forming acetoacetyl-CoA from two molecules of acetyl-CoA, releasing one CoA. A key step in ketogenesis and sterol synthesis. Synonym: acetoacetyl-CoA thiolase, acetyl-CoA thiolase, thiolase. (05 Mar 2000) |
| acetyl-CoA acylase | <enzyme> An enzyme that catalyses reversibly the hydrolysis of acetyl-CoA to yield CoA and acetate. The enzyme is involved in the oxidation of fatty acids. Chemical name: Acetyl-CoA hydrolase Registry number: EC 3.1.2.1 (12 Dec 1998) |
| acetyl-CoA acyltransferase | <enzyme> An enzyme catalyzing the thioclastic cleavage by coenzyme A of beta-ketoacyl-CoA, forming an acyl-CoA with a carbon chain shorter by two atoms, the missing two atoms appearing as acetyl-CoA. A step in fatty acid degradation. See: acetyl-CoA acetyltransferase. Synonym: 3-ketoacyl-CoA thiolase, beta-ketothiolase. (05 Mar 2000) |
| acetyl-CoA c-acetyltransferase | <enzyme> An enzyme that catalyses the reversible formation of acetoacetyl-CoA from two molecules of acetyl-CoA. Chemical name: Acetyl-CoA:acetyl-CoA C-acetyltransferase Registry number: EC 2.3.1.9 (12 Dec 1998) |
| acetyl-CoA c-acyltransferase | <enzyme> Enzyme that catalyses the final step of fatty acid oxidation in which acetyl-CoA is released and the CoA ester of a fatty acid two carbons shorter is formed. Chemical name: Acyl-CoA:acetyl-CoA C-acyltransferase Registry number: EC 2.3.1.16 (12 Dec 1998) |
| acetyl-CoA carboxylase | <enzyme> A carboxylating enzyme that catalyses the conversion of ATP, acetyl-CoA, and hco3- to ADP, orthophosphate, and malonyl-CoA. It is a biotinyl-protein that also catalyses transcarboxylation. The plant enzyme also carboxylates propanoyl-CoA and butanoyl-CoA Chemical name: Acetyl-CoA:carbon-dioxide ligase (ADP-forming) Registry number: EC 6.4.1.2 (12 Dec 1998) |
| acetyl-CoA deacylase | <enzyme> An enzyme that catalyses reversibly the hydrolysis of acetyl-CoA to yield CoA and acetate. The enzyme is involved in the oxidation of fatty acids. Chemical name: Acetyl-CoA hydrolase Registry number: EC 3.1.2.1 (12 Dec 1998) |
| acetyl-CoA hydrolase | <enzyme> An enzyme that catalyses reversibly the hydrolysis of acetyl-CoA to yield CoA and acetate. The enzyme is involved in the oxidation of fatty acids. Chemical name: Acetyl-CoA hydrolase Registry number: EC 3.1.2.1 (12 Dec 1998) |
| acetyl-CoA ligase | A ligase that catalyses the reaction of acetate and CoA and ATP to form AMP, pyrophosphate, and acetyl-CoA. A key step in the activation of acetate. Synonym: acetate thiokinase, acetate-CoA ligase, acetyl-activating enzyme, acetyl-CoA synthetase. (05 Mar 2000) |
| acetyl-CoA synthetase | A ligase that catalyses the reaction of acetate and CoA and ATP to form AMP, pyrophosphate, and acetyl-CoA. A key step in the activation of acetate. Synonym: acetate thiokinase, acetate-CoA ligase, acetyl-activating enzyme, acetyl-CoA synthetase. (05 Mar 2000) |