5-hydroxy-L-tryptophan
362,296 routes · scope human · up to 3 steps · built 5 October 2026 · Reactions · API
386 compounds within 3 steps: 3 in 1, 46 in 2, 337 in 3
Three steps
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- acetyl-CoA C-acyltransferase (3-oxomyrist-5-enoyl-CoA)
Catalysed by DDC, AANAT, HADHA, ACAA2 and 1 morecytosol, mitochondrial matrixOne of 3 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of cysteine and tryptophan (cytosol to extracellular)
- 2 L-cysteine = S-sulfanyl-L-cysteine + L-alanine
Catalysed by TPH1, TPH2, SLC7A5, CARS2extracellular space, cytosol
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- 3alpha,7alpha,12alpha-trihydroxy-5beta-cholestanoate:CoA ligase (AMP-forming)
Catalysed by DDC, AANAT, SLC27A2, SLC27A5cytosol, endoplasmic reticulumOne of 3 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of glutamine and tryptophan (cytosol to extracellular)
- phosphoribosyl pyrophosphate amidotransferase (glutamine)
Catalysed by TPH1, TPH2, SLC7A5, PPATextracellular space, cytosolOne of 2 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of glutamine and tryptophan (cytosol to extracellular)
- D-fructose 6-phosphate + L-glutamine = D-glucosamine 6-phosphate + L-glutamate
Catalysed by TPH1, TPH2, SLC7A5, GFPT2 and 1 moreextracellular space, cytosol
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of methionine and tryptophan (cytosol to extracellular)
- [thioredoxin]-disulfide + L-methionine + H2O = L-methionine (S)-S-oxide + [thioredoxin]-dithiol
Catalysed by TPH1, TPH2, SLC7A5, MSRAextracellular space, cytosol
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of methionine and tryptophan (cytosol to extracellular)
- [thioredoxin]-disulfide + L-methionine + H2O = L-methionine (R)-S-oxide + [thioredoxin]-dithiol
Catalysed by TPH1, TPH2, SLC7A5, MSRB3 and 2 moreextracellular space, cytosol
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of ornithine and tryptophan (cytosol to extracellular)
- L-ornithine + pyruvate = 5-amino-2-oxopentanoate + L-alanine
Catalysed by TPH1, TPH2, SLC7A6, AGXT2extracellular space, cytosolOne of 2 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- cholate-CoA ligase (3alpha,12alpha-dihydroxy-5beta-cholanate)
Catalysed by DDC, AANAT, SLC27A2, SLC27A5cytosolOne of 4 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- transport of GSH and serotonin (cytosol to extracellular)
- Sulfide:glutathione,quinone oxidoreductase
Catalysed by DDC, SLCO1A2, SLCO1B3, SQORextracellular space, cytosol, mitochondrial matrix
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of glycine and tryptophan (cytosol to extracellular)
- (5Z,8Z,11Z,14Z)-eicosatetraenoyl-CoA + glycine = N-(5Z,8Z,11Z,14Z)-eicosatetraenoyl-glycine + CoA + H(+)
Catalysed by TPH1, TPH2, SLC7A5, GLYATL2extracellular space, cytosolOne of 2 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of cysteine and tryptophan (cytosol to extracellular)
- (R)-4'-phosphopantothenate:L-cysteine ligase
Catalysed by TPH1, TPH2, SLC7A5, PPCSextracellular space, cytosolOne of 4 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- Transport of L-Tryptophan by Atb0 Transporter
- transport of 4-aminobutyrate and chloride (cytosol to extracellular)
Catalysed by TPH1, TPH2, SLC6A14, SLC6A12extracellular space, cytosolOne of 4 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of tryptophan and tyrosine (cytosol to extracellular)
- thyroid peroxidase (iodine)
Catalysed by TPH1, TPH2, SLC7A5, TPOextracellular space, cytosolOne of 2 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tyrosine + O2 = (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin + L-dopa
- L-dopa + H(+) = dopamine + CO2
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- transport of serotonin (cytosol to extracellular)
- transport of S-glutathionyl-2-4-dinitrobenzene (cytosol to extracellular)
Catalysed by DDC, SLCO1A2, SLCO1B3extracellular space, cytosolOne of 4 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of alanine and tryptophan (cytosol to extracellular)
- L-proline(out) + L-alanine(in) + Na(+)(out) = L-proline(in) + L-alanine(out) + Na(+)(in)
Catalysed by TPH1, TPH2, SLC7A5, SLC1A4extracellular space, cytosol, inner side of the membrane, outer side of the membraneOne of 2 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- transport of serotonin (cytosol to extracellular)
- transport of estrone 3-sulfate (cytosol to extracellular)
Catalysed by DDC, SLCO1A2, SLCO1B3, SLCO1B1extracellular space, cytosolOne of 2 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin(out) + a dicarboxylate(in) = (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin(in) + a dicarboxylate(out)
- prostaglandin E2(out) + a dicarboxylate(in) = prostaglandin E2(in) + a dicarboxylate(out)
Catalysed by TPH1, TPH2, SLC22A6, SLC22A8inner side of the membrane, outer side of the membraneOne of 6 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of glycine and tryptophan (cytosol to extracellular)
- Hippurate (Benzoylglycinate) Formation
Catalysed by TPH1, TPH2, SLC7A5extracellular space, cytosol, mitochondrial matrixOne of 4 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of cysteine and tryptophan (cytosol to extracellular)
- L-Cysteine:oxygen oxidoreductase
Catalysed by TPH1, TPH2, SLC7A5, CDO1extracellular space, cytosolOne of 6 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- medium-chain acyl-CoA ligase (decanoic acid)
Catalysed by DDC, AANAT, ACSM4, ACSM1 and 4 morecytosolOne of 7 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- Carnitine O-Palmitoyltransferase
Catalysed by DDC, AANAT, CPT1A, CPT1C and 1 morecytosolOne of 4 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (palmitolate)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 11 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of alanine and tryptophan (cytosol to extracellular)
- gamma-glutamyltransferase (alanine)
Catalysed by TPH1, TPH2, SLC7A5, GGTLC3 and 5 moreextracellular space, cytosolOne of 6 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- 5-Hydroxytryptamine:oxygen oxidoreductase(deaminating)(flavin-containing)
- 5-Hydroxyindoleacetaldehyde:NAD+ Oxidoreductase, Mitochondrial
Catalysed by DDC, MAOA, MAOB, ALDH2 and 1 morecytosol, mitochondrial matrixOne of 4 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (adrenic acid)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 7 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (cerotic acid)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 5 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (lignocerate)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 10 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (behenic acid)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 9 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of arginine and tryptophan (cytosol to extracellular)
- L-arginine,NADPH:oxygen oxidoreductase (N-(omega)-hydroxyarginine-forming)
Catalysed by TPH1, TPH2, SLC7A6, NOS3 and 2 moreextracellular space, cytosol
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- Transport of 3-Hydroxy-L-Kynurenine
- Kynurenine-Oxoglutarate Transaminase
Catalysed by TPH1, TPH2, SLC7A5, AADATextracellular space, cytosol, mitochondrial matrixOne of 2 routes
- (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin + L-tryptophan + O2 = 5-hydroxy-L-tryptophan + (4aS,6R)-4a-hydroxy-L-erythro-5,6,7,8-tetrahydrobiopterin
- transport of alanine and tryptophan (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
Catalysed by TPH1, TPH2, SLC7A5, MOCOSextracellular space, cytosol
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- Carnitine O-Palmitoyltransferase
Catalysed by DDC, AANAT, CPT1A, CPT1C and 1 morecytosolOne of 3 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (stearidonic acid)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 8 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- transport of serotonin (cytosol to extracellular)
- transport of noradrenaline (cytosol to extracellular)
Catalysed by DDC, SLCO1A2, SLCO1B3extracellular space, cytosolOne of 4 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (EPA)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 9 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (DPA)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 6 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (linolenate)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 7 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (cis-erucic acid)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 6 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (cis-gondoic acid)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 7 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase ((9Z,12Z,15Z,18Z,21Z)-TPA)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 5 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase ((6Z,9Z,12Z,15Z,18Z,21Z)-THA)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 4 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (nervonic acid)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 6 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (ximenic acid)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 4 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (dihomo-gamma-linolenate)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 5 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (omega-3-arachidonic acid)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 5 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (DHA)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 7 routes
- 5-hydroxy-L-tryptophan + H(+) = serotonin + CO2
- acetyl-CoA:aralkylamine N-acetyltransferase
- long-chain-fatty-acid-CoA ligase (margaric acid)
Catalysed by DDC, AANAT, SLC27A2, ACSL4 and 6 morecytosolOne of 6 routes