Acetylserotonin O-Methyltransferase

**Definition:** An enzyme that catalyzes the transfer of a methyl group from S-adenosylmethionine to N-acetylserotonin to form N-acetyl-5-methoxytryptamine (MELATONIN).

**Tree numbers:** - D08.811.913.555.500.100

**Synonyms:** - Acetylserotonin Methyltransferase - Hydroxyindole O-Methyltransferase - Oxyindol-O-Methyltransferase - HIOMT