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citrate → cis-aconitate → isocitrate → α-ketoglutarate → succinyl-CoA → succinate → fumarate → malate → oxaloacetate → citrate. In this cycle, the enzyme isocitrate dehydrogenase 3 converts isocitrate (isocitrate has 4 isomers of which only the (−)-d-threo-isomer is the naturally occurring isomer in the citric acid cycle.
Fat mass and obesity-associated protein also known as alpha-ketoglutarate-dependent dioxygenase FTO is an enzyme that in humans is encoded by the FTO gene located on chromosome 16. As one homolog in the AlkB family proteins, it is the first messenger RNA (mRNA) demethylase that has been identified. [ 5 ]
Isocitrate dehydrogenase (IDH) (EC 1.1.1.42) and (EC 1.1.1.41) is an enzyme that catalyzes the oxidative decarboxylation of isocitrate, producing alpha-ketoglutarate (α-ketoglutarate) and CO 2. This is a two-step process, which involves oxidation of isocitrate (a secondary alcohol ) to oxalosuccinate (a ketone ), followed by the ...
This enzyme complex catalyzes the oxidative decarboxylation of branched, short-chain alpha-ketoacids. BCKDC is a member of the mitochondrial α-ketoacid dehydrogenase complex family, which also includes pyruvate dehydrogenase and alpha-ketoglutarate dehydrogenase, key enzymes that function in the Krebs cycle.
α-ketoglutarate + NAD + + CoA → Succinyl CoA + CO 2 + NADH Oxoglutarate dehydrogenase (α-Ketoglutarate dehydrogenase) This reaction proceeds in three steps: decarboxylation of α-ketoglutarate, reduction of NAD + to NADH, and subsequent transfer to CoA, which forms the end product, succinyl CoA. ΔG°' for this reaction is -7.2 kcal mol −1.
alpha-ketoglutaric acid, a 5-carbon ketoacid derived from glutamic acid. Alpha-ketoglutarate participates in cell signaling by functioning as a coenzyme. [6] It is commonly used in transamination reactions. Beta-keto acids, beta-ketoacids, or 3-oxoacids, such as acetoacetic acid, have the ketone group at the second carbon from the carboxylic acid.
TET enzymes are dioxygenases in the family of alpha-ketoglutarate-dependent hydroxylases. A TET enzyme is an alpha-ketoglutarate (α-KG) dependent dioxygenase that catalyses an oxidation reaction by incorporating a single oxygen atom from molecular oxygen (O 2 ) into its substrate, 5-methylcytosine in DNA (5mC), to produce the product 5 ...
Price JC, Barr EW, Tirupati B, Bollinger JM Jr, Krebs C (June 2003). "The first direct characterization of a high-valent iron intermediate in the reaction of an alpha-ketoglutarate-dependent dioxygenase: a high-spin FeIV complex in taurine/alpha-ketoglutarate dioxygenase (TauD) from Escherichia coli". Biochemistry. 42 (24): 7497–7508.
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