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Hyperlysinemia has an autosomal recessive pattern of inheritance. Hyperlysinemia is inherited in an autosomal recessive manner. [2] This means the defective gene responsible for the disorder is located on an autosome, and two copies of the defective gene (one inherited from each parent) are required in order to be born with the disorder.
α-Ketoglutarate is a component of the citric acid cycle, a cyclical metabolic pathway located in the mitochondria.This cycle supplies the energy that cells need by sequentially metabolizing (indicated by →) citrate through seven intermediate metabolites and then converting the eighth intermediate metabolite, oxaloacetate, back to citrate: [2]
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.
Alpha-ketoglutarate dehydrogenase also known as 2-oxoglutarate dehydrogenase E1 component, mitochondrial is an enzyme that in humans is encoded by the OGDH gene. [ 5 ] [ 6 ] [ 7 ] Structure
Lysine Degradation Steps Catalyzed by Alpha-aminoadipic semialdehyde dehydrogenase. First, the N-terminal portion of this enzyme which contains lysine-ketoglutarate reductase (LOR/LKR) activity (EC:1.5.1.8) condenses lysine and 2-oxoglutarate to a molecule called saccharopine (Reaction 1 on the figure to the right).
This pathway raises the possibility of a therapeutic treatment. The build-up of succinate inhibits PHD activity. PHD action normally requires oxygen and alpha-ketoglutarate as cosubstrates and ferrous iron and ascorbate as cofactors. Succinate competes with α-ketoglutarate in binding to the PHD enzyme.
The disease results from a deficiency in hepatic tyrosine aminotransferase. [10] Tyrosinemia type II (Richner-Hanhart syndrome, RHS) is a disease of autosomal recessive inheritance characterized by keratitis, palmoplantar hyperkeratosis, mental retardation, and elevated blood tyrosine levels. [10]
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