Medical Definition of AANAT

AANAT: The synbol for the enzyme arylalkylamine N-acetyltransferase and for the gene that encodes it. AANAT is present in animals, bacteria and yeast but in no other living organisms. AANAT belongs to the large superfamily of acetyltransferase enzymes. AANAT is used to make melatonin, a hormone that regulates the body's cycles of sleeping and waking.

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Last Editorial Review: 12/21/2018