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Transamination

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Transamination describes the reactions involved in the passage of amino (-NH2) groups from amino acids to alpha-keto acids. This converts the amino acid into an alpha-keto acid, and vice versa.

There are a number of enzymes - aminotransferases - involved with transamination. Their presence does not necessarily indicate that a particular amino acid is metabolized by this route. Amino acids such as histidine and serine are degraded by alternative routes.

If 2-oxoglutarate acts as the receiving alpha-keto acid, it is converted to glutamate. It may be reconverted back to 2-oxoglutarate by the action of glutamate dehydrogenase with the production of ammonia. This facilitates transamination by providing more substrate. Ammonia can be passed to the urea cycle.


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