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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]
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.
lysine alpha-ketoglutarate reductase deficiency disease; saccharopine dehydrogenase deficiency disease; saccharopinuria; Hyperlysinemia is characterized by elevated plasma lysine levels that exceed 600 μmol/L and can reach up to 2000 μmol/L. [21] [22] These increased levels of lysine do not appear to have any negative effects on the body. [8]
This gene encodes a subunit that catalyzes the oxidative decarboxylation of alpha-ketoglutarate to Succinyl-CoA at its active site in the fourth step of the citric acid cycle by acting as a base to facilitate the decarboxylation. The main residues responsible for the catalysis are thought to be His 260, Phe 227, Gln685, His 729, Ser302, and His ...
A deficiency in any of the enzymes of this complex as well as an inhibition of the complex as a whole leads to a buildup of branched-chain amino acids and their harmful derivatives in the body. These accumulations lend a sweet smell to bodily excretions (such as ear wax and urine), leading to a pathology known as maple syrup urine disease .
Water attacks the alpha carbon of the imine of PLP-TYR and through acyl substitution kicks off the nitrogen of PLP and forming pyridoxamine phosphate (PMP) and 4-hydroxyphenylpyruvate. PMP is then regenerated into PLP by transferring its amine group to alpha-ketoglutarate, reforming its aldehyde functional group.
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 ...
Calcium-alpha-ketoglutarate (C 5 H 4 CaO 5 •H 2 O) is a special form mineral calcium that can be used to restore calcium concentration level in the blood back to normal. Calcium-alpha-ketoglutarate binds excess phosphate and pass it as a waste, re-establishing normal balance of calcium and phosphate in the body.
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