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Tryptophan (symbol Trp or W) [3] is an α-amino acid that is used in the biosynthesis of proteins.Tryptophan contains an α-amino group, an α-carboxylic acid group, and a side chain indole, making it a polar molecule with a non-polar aromatic beta carbon substituent.
5-HTP is produced from the amino acid tryptophan through the action of the enzyme tryptophan hydroxylase. Tryptophan hydroxylase is one of the biopterin-dependent aromatic amino acid hydroxylases. Production of 5-HTP is the rate-limiting step in 5-HT (serotonin) synthesis. 5-HTP is normally rapidly converted to 5-HT by amino acid decarboxylase. [1]
In enzymology, a tryptophan-tRNA ligase (EC 6.1.1.2) is an enzyme that catalyzes the chemical reaction. ATP + L-tryptophan + tRNATrp AMP + diphosphate + L-tryptophyl-tRNATrp. The 3 substrates of this enzyme are ATP, L-tryptophan, and tRNA(Trp), whereas its 3 products are AMP, diphosphate, and L-tryptophyl-tRNATrp.
Familial hypertryptophanemia has an autosomal recessive pattern of inheritance.. Hypertryptophanemia is believed to be inherited in an autosomal recessive manner. [2] This means a defective gene responsible for the disorder is located on an autosome, and two copies of the defective gene (one inherited from each parent) are required in order to be born with the disorder.
Tryptophan hydroxylase (TPH) is an enzyme (EC 1.14.16.4) involved in the synthesis of the monoamine neurotransmitter serotonin. Tyrosine hydroxylase , phenylalanine hydroxylase , and tryptophan hydroxylase together constitute the family of biopterin-dependent aromatic amino acid hydroxylases .
Structure of the trp operon. The trp operon is a group of genes that are transcribed together, encoding the enzymes that produce the amino acid tryptophan in bacteria. The trp operon was first characterized in Escherichia coli, and it has since been discovered in many other bacteria. [1]
56720 Ensembl ENSG00000262635 ENSG00000151790 ENSMUSG00000028011 UniProt P48775 P48776 RefSeq (mRNA) NM_005651 NM_019911 RefSeq (protein) NP_005642 NP_064295 Location (UCSC) Chr 4: 155.85 – 155.92 Mb Chr 3: 81.86 – 81.88 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse In enzymology, tryptophan 2,3-dioxygenase (EC 1.13.11.11) is a heme enzyme that catalyzes the oxidation of L ...
[1] [2] The amino acids L-tryptophan and L-5-hydroxytryptophan (5-HTP; oxitriptan) are precursors of serotonin and melatonin, while the amino acids L-phenylalanine, L-tyrosine, and L-DOPA (levodopa) are precursors of dopamine, epinephrine (adrenaline), and norepinephrine (noradrenaline).