34543 (PPC2) PEPcase superfamilyThalassiosira pseudonana
GO:0006099 GO:0008964 -
tricarboxylic acid cycle
A nearly universal metabolic pathway in which the acetyl group of acetyl coenzyme A is effectively oxidized to two CO2 and four pairs of electrons are transferred to coenzymes. The acetyl group combines with oxaloacetate to form citrate, which undergoes successive transformations to isocitrate, 2-oxoglutarate, succinyl-CoA, succinate, fumarate, malate, and oxaloacetate again, thus completing the cycle. In eukaryotes the tricarboxylic acid is confined to the mitochondria. See also glyoxylate cycle.
phosphoenolpyruvate carboxylase activity
Catalysis of the reaction: phosphate + oxaloacetate = phosphoenolpyruvate + HCO3-.