Definition: An enzyme that catalyzes the transfer of a methyl group from S-adenosylmethionine to N-acetylserotonin to form N-acetyl-5-methoxytryptamine (MELATONIN).
Other names Hydroxyindole O-Methyltransferase; Oxyindol O Methyltransferase; O-Methyltransferase, Hydroxyindole; O-Methyltransferase, Acetylserotonin; Methyltransferase, Acetylserotonin; Hydroxyindole O Methyltransferase; Acetylserotonin O Methyltransferase; Oxyindol-O-Methyltransferase; HIOMT; Acetylserotonin Methyltransferase