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Organic acidemia is a term used to classify a group of metabolic disorders which disrupt normal amino acid metabolism, particularly branched-chain amino acids, causing a buildup of acids which are usually not present. [1] The branched-chain amino acids include isoleucine, leucine and valine. [1]
Nonstandard amino acids are usually formed through modifications to standard amino acids. For example, homocysteine is formed through the transsulfuration pathway or by the demethylation of methionine via the intermediate metabolite S-adenosylmethionine, [114] while hydroxyproline is made by a post translational modification of proline. [115]
Traditionally the inherited metabolic diseases were classified as disorders of carbohydrate metabolism, amino acid metabolism, organic acid metabolism, or lysosomal storage diseases. [4] In recent decades, hundreds of new inherited disorders of metabolism have been discovered and the categories have proliferated.
An essential amino acid, or indispensable amino acid, is an amino acid that cannot be synthesized from scratch by the organism fast enough to supply its demand, and must therefore come from the diet. Of the 21 amino acids common to all life forms, the nine amino acids humans cannot synthesize are valine , isoleucine , leucine , methionine ...
Congenital errors of amino acid metabolism are inherited metabolic disorders that impair the synthesis and degradation of amino acids. [1] This means that the body has trouble breaking down and building some amino acids, the building blocks of protein in the body. [2] The body can also have trouble with cellular update up amino acids.
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Other names: Urine amino acids [1] Share of amino acid in various human diets and the resulting mix of amino acids in human blood serum. Glutamate and glutamine are the most frequent in food at over 10%, while alanine, glutamine, and glycine are the most common in blood. Complications: Severe protein loss in the blood: Risk factors
The essential amino acids valine, methionine, isoleucine, and threonine can not be converted and this leads to a buildup of propionyl-CoA. Instead of being converted to methylmalonyl-CoA, propionyl-CoA is then converted into propionic acid, which builds up in the bloodstream. This in turn causes an accumulation of dangerous acids and toxins ...