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The reaction it catalyzes is: pyruvate + HCO − 3 + ATP → oxaloacetate + ADP + P. It is an important anaplerotic reaction that creates oxaloacetate from pyruvate. PC contains a biotin prosthetic group [1] and is typically localized to the mitochondria in eukaryotes with exceptions to some fungal species such as Aspergillus nidulans which have a cytosolic PC.
Pyruvate is converted into acetyl-coenzyme A, which is the main input for a series of reactions known as the Krebs cycle (also known as the citric acid cycle or tricarboxylic acid cycle). Pyruvate is also converted to oxaloacetate by an anaplerotic reaction , which replenishes Krebs cycle intermediates; also, the oxaloacetate is used for ...
Pyruvate + 2 H + + 2 e − → Lactate-0.19 [9] Oxaloacetate + 2 H + + 2 e − → Malate-0.17 [10] While under standard conditions malate cannot reduce the more electronegative NAD +:NADH couple, in the cell the concentration of oxaloacetate is kept low enough that Malate dehydrogenase can reduce NAD + to NADH during the citric acid cycle.
Pyruvate molecules produced by glycolysis are actively transported across the inner mitochondrial membrane, and into the matrix where they can either be oxidized and combined with coenzyme A to form CO 2, acetyl-CoA, and NADH, [35] or they can be carboxylated (by pyruvate carboxylase) to form oxaloacetate. This latter reaction "fills up" the ...
Oxaloacetic acid (also known as oxalacetic acid or OAA) is a crystalline organic compound with the chemical formula HO 2 CC(O)CH 2 CO 2 H. Oxaloacetic acid, in the form of its conjugate base oxaloacetate, is a metabolic intermediate in many processes that occur in animals.
Phosphoenolpyruvate carboxykinase (ATP) (EC 4.1.1.49, phosphopyruvate carboxylase (ATP), phosphoenolpyruvate carboxylase, phosphoenolpyruvate carboxykinase, phosphopyruvate carboxykinase (adenosine triphosphate), PEP carboxylase, PEP carboxykinase, PEPCK (ATP), PEPK, PEPCK, phosphoenolpyruvic carboxylase, phosphoenolpyruvic carboxykinase, phosphoenolpyruvate carboxylase (ATP), phosphopyruvate ...
As a phosphate is transferred, the reaction results in a GDP molecule. [10] When pyruvate kinase – the enzyme that normally catalyzes the reaction that converts PEP to pyruvate – is knocked out in mutants of Bacillus subtilis , PEPCK participates in one of the replacement anaplerotic reactions , working in the reverse direction of its ...
Oxaloacetate decarboxylase is a carboxy-lyase involved in the conversion of oxaloacetate into pyruvate.. It is categorized under EC 4.1.1.3.. Oxaloacetate decarboxylase activity in a given organism may be due to activity of malic enzyme, pyruvate kinase, malate dehydrogenase, pyruvate carboxylase and PEP carboxykinase or the activity of "real" oxaloacetate decarboxylases.