Search results
Results from the WOW.Com Content Network
Citrate synthase (E.C. 2.3.3.1 (previously 4.1.3.7)) is an enzyme that exists in nearly all living cells. It functions as a pace-making enzyme in the first step of the citric acid cycle (or Krebs cycle). [5] Citrate synthase is located within eukaryotic cells in the mitochondrial matrix, but is encoded by nuclear DNA rather than
In molecular biology, the citrate synthase family of proteins includes the enzymes citrate synthase EC 2.3.3.1, and the related enzymes 2-methylcitrate synthase EC 2.3.3.5 and ATP citrate lyase EC 2.3.3.8. Citrate synthase is a member of a small family of enzymes that can directly form a carbon-carbon bond without the presence of metal ion ...
Oxaloacetate can then be consumed by citrate synthase, phosphoenolpyruvate carboxykinase or aspartate aminotransferase, feeding into the citric acid cycle, gluconeogenesis or aspartic acid biosynthesis, respectively. Being able to predict how much oxaloacetate goes into which pathway requires knowledge of the concentration of oxaloacetate as ...
In enzymology, a citrate (Re)-synthase (EC 2.3.3.3) is an enzyme that catalyzes the chemical reaction acetyl-CoA + H 2 O + oxaloacetate ⇌ {\displaystyle \rightleftharpoons } citrate + CoA The 3 substrates of this enzyme are acetyl-CoA , H 2 O , and oxaloacetate , whereas its two products are citrate and CoA .
However, in the presence of high levels of malate and NAD +, citrate can stimulate the production of oxaloacetate. Although malate dehydrogenase is typically considered a reversible enzyme, it is believed that there is an allosteric regulatory site on the enzyme where citrate can bind to and drive the reaction equilibrium in either direction. [19]
In enzymology, a 2-methylcitrate synthase (EC 2.3.3.5) is an enzyme that catalyzes the chemical reaction propanoyl-CoA + H 2 O + oxaloacetate ⇌ {\displaystyle \rightleftharpoons } (2R,3S)-2-hydroxybutane-1,2,3-tricarboxylate + CoA
ATP citrate synthase (also ATP citrate lyase (ACLY)) is an enzyme that in animals catalyzes an important step in fatty acid biosynthesis. [2] By converting citrate to acetyl-CoA , the enzyme links carbohydrate metabolism , which yields citrate as an intermediate , with fatty acid biosynthesis , which consumes acetyl-CoA. [ 3 ]
Oxoglutarate dehydrogenase is a key control point in the citric acid cycle. It is inhibited by its products, succinyl CoA and NADH.A high energy charge in the cell will also be inhibitive.