Aromatic amino acids (AAAs)

Aromatic amino acids are a group of amino acids characterized by having an aromatic ring in their structure. In humans and animals, the major aromatic amino acids are phenylalanine, tyrosine, and tryptophan. Phenylalanine and tryptophan are essential amino acids (they cannot be synthesized in the human body and must be obtained from diet), while tyrosine is semi-essential and synthesized from phenylalanine[2][5][6][9]. Aromatic amino acids play crucial roles in protein synthesis, stabilization of protein structure, and as precursors for important neurotransmitters (e.g., dopamine, norepinephrine, serotonin) and hormones (e.g., melatonin, thyroid hormones). Abnormalities in their metabolism underlie several metabolic and neurological diseases, but the group "aromatic amino acids" is not itself a therapeutic target, receptor, enzyme, or transporter, though individual metabolic enzymes acting on them (such as phenylalanine hydroxylase, tryptophan hydroxylase, tyrosine hydroxylase) are well-established drug targets[2][3][4][6][8][9]. Therefore, referring to "aromatic amino acids" as a discrete drug target, receptor, or molecular entity is incorrect, as this term encompasses multiple diverse molecules, not a single actionable target. Context and supporting details: - Aromatic amino acids are grouped based on the presence of an aromatic ring structure (benzene or indole rings for phenylalanine, tyrosine, tryptophan)[1][5][7]. - Their main biological functions are as building blocks of proteins and precursors for numerous bioactive compounds[2][3][4][6][8]. - Imbalances in their metabolism are implicated in a range of disorders, but therapeutics target specific enzymes or pathways within aromatic amino acid metabolism rather than the amino acids as a group[6][8]. - Drugs do not interact with "aromatic amino acids" as a group but may interact with enzymes or receptors modulated by their downstream products or metabolic pathways. In summary: - "Aromatic amino acids" is not a canonical target name, not a single molecule, nor a druggable target class. - The entry is considered incorrect for purposes of target-based drug discovery or pharmacology.

Other names

Aromatic amino acidAAAsaromatic amino acids