5,6,7,8-tetrahydrobiopterin
362,296 routes · scope human · up to 3 steps · built 5 October 2026 · Reactions · API
329 compounds within 3 steps: 4 in 1, 28 in 2, 297 in 3
Three steps
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- aldehyde dehydrogenase (2-methyl-3-oxopropanoate)
Catalysed by PAH, ALDH6A1cytosol, mitochondrial matrixOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- (S)-methylmalonyl-CoA hydrolase
Catalysed by PAHcytosol, mitochondrial matrix
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- acid phosphatase 2, lysosomal (CoA)
Catalysed by PAH, ACP2cytosol, mitochondrial matrix, lysosomeOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- (2E)-dodecenoyl-CoA formation
Catalysed by PAHcytosol, mitochondrial matrixOne of 3 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- propanoyl-CoA C-acyltransferase (3-ketopristanoyl-CoA)
Catalysed by PAH, ACAA1, MYO5Bcytosol, mitochondrial matrix, peroxisomeOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- long-chain-fatty-acid-CoA ligase (gamma-linolenate)
Catalysed by PAH, SLC27A2, ACSL4, ACSL3 and 5 morecytosol, mitochondrial matrixOne of 7 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- Butanoate:CoA ligase (AMP-forming)
Catalysed by PAH, ACSM4, ACSM1, ACSM2A and 3 morecytosol, mitochondrial matrixOne of 9 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- long-chain-fatty-acid-CoA ligase (lauric acid)
Catalysed by PAH, SLC27A2, ACSL4, ACSL3 and 5 morecytosol, mitochondrial matrixOne of 9 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- Production of Glutaryl Carnitine
Catalysed by PAH, CPT1A, CPT1C, CPT1Bcytosol, mitochondrial matrixOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- long-chain-fatty-acid-CoA ligase (eicosanoate)
Catalysed by PAH, SLC27A2, ACSL4, ACSL3 and 5 morecytosol, mitochondrial matrixOne of 12 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- Itaconate:CoA ligase (GDP-forming)
Catalysed by PAH, SUCLG1, SUCLG2, SUCLA2cytosol, mitochondrial matrixOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- long-chain-fatty-acid-CoA ligase ((6Z,9Z)-octadecadienoic acid)
Catalysed by PAH, SLC27A2, ACSL4, ACSL3 and 5 morecytosol, mitochondrial matrixOne of 13 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- long-chain-fatty-acid-CoA ligase (myristic acid)
Catalysed by PAH, SLC27A2, ACSL4, ACSL3 and 5 morecytosol, mitochondrial matrixOne of 11 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- Octanoyl-CoA:L-carnitine O-octanoyltransferase
Catalysed by PAH, CROTcytosol, mitochondrial matrixOne of 20 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- phytanate-CoA ligase
Catalysed by PAHcytosol, mitochondrial matrixOne of 5 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- long-chain-fatty-acid-CoA ligase (stearate)
Catalysed by PAH, SLC27A2, ACSL4, ACSL3 and 4 morecytosol, mitochondrial matrixOne of 15 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of alanine and tyrosine (cytosol to extracellular)
- D-alanine(out) + L-alanine(in) = D-alanine(in) + L-alanine(out)
Catalysed by PAH, SLC7A5, SLC7A10cytosol, extracellular space, inner side of the membrane, outer side of the membraneOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of glycine and tyrosine (cytosol to extracellular)
- sarcosine + O2 + H2O = formaldehyde + glycine + H2O2
Catalysed by PAH, SLC7A5, PIPOXcytosol, extracellular spaceOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of glycine and tyrosine (cytosol to extracellular)
- (6R)-5,10-methylene-5,6,7,8-tetrahydrofolate + glycine + H2O = (6S)-5,6,7,8-tetrahydrofolate + L-serine
Catalysed by PAH, SLC7A5, SHMT1, SHMT2cytosol, extracellular space
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of arginine and tyrosine (cytosol to extracellular)
- 2-(Nomega-L-arginino)succinate arginine-lyase (fumarate-forming)
Catalysed by PAH, SLC7A6, ASLcytosol, extracellular spaceOne of 4 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of phenylalanine and tyrosine (cytosol to extracellular)
- L-histidine(in) + L-phenylalanine(out) = L-histidine(out) + L-phenylalanine(in)
Catalysed by PAH, SLC7A5, SLC7A8cytosol, extracellular space, inner side of the membrane, outer side of the membraneOne of 7 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of ornithine and tyrosine (cytosol to extracellular)
- D-ornithine(in) + L-ornithine(out) = D-ornithine(out) + L-ornithine(in)
Catalysed by PAH, SLC7A6, SLC25A2cytosol, extracellular space, inner side of the membrane, outer side of the membraneOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of glycine and tyrosine (cytosol to extracellular)
- an acyl-CoA + glycine = an N-acylglycine + CoA + H(+)
Catalysed by PAH, SLC7A5, GLYATL3, GLYAT and 1 morecytosol, extracellular space
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of cysteine and tyrosine (cytosol to extracellular)
- L-Cysteine:2-oxoglutarate aminotransferase
Catalysed by PAH, SLC7A5, GOT2, GOT1cytosol, extracellular spaceOne of 3 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of glycine and tyrosine (cytosol to extracellular)
- L-Arginine:glycine amidinotransferase
Catalysed by PAH, SLC7A5, GATMcytosol, extracellular spaceOne of 5 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- acyl-CoA:sphingosine N-acyltransferase
Catalysed by PAH, ASAH1, ACER2, ACER1 and 1 morecytosol, mitochondrial matrix, Golgi apparatusOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of alanine and tyrosine (cytosol to extracellular)
- D-threonine(out) + L-alanine(in) = D-threonine(in) + L-alanine(out)
Catalysed by PAH, SLC7A5, SLC7A10cytosol, extracellular space, inner side of the membrane, outer side of the membraneOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- diamine N-acetyltransferase (N1-acetylspermidine)
Catalysed by PAH, SAT1, SAT2cytosol, mitochondrial matrixOne of 3 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of alanine and tyrosine (cytosol to extracellular)
- L-threonine(out) + L-alanine(in) = L-threonine(in) + L-alanine(out)
Catalysed by PAH, SLC7A5, SLC7A10cytosol, extracellular space, inner side of the membrane, outer side of the membraneOne of 8 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of lysine and tyrosine (cytosol to extracellular)
- N6-(L-1,3-Dicarboxypropyl)-L-lysine:NADP+ oxidoreductase (L-lysine-forming)
Catalysed by PAH, SLC7A6, AASScytosol, extracellular space, mitochondrial matrix
- L-Tyrosine,tetrahydrobiopterin:oxygen oxidoreductase (3-hydroxylating)
- solute carrier (L-dopa)
- Transport of L-Kynurenine
Catalysed by TH, SLC3A2, SLC7A5, SLC43A1cytosol, extracellular spaceOne of 5 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of alanine and tyrosine (cytosol to extracellular)
- beta-alanine(out) + L-alanine(in) = beta-alanine(in) + L-alanine(out)
Catalysed by PAH, SLC7A5, SLC7A10cytosol, extracellular space, inner side of the membrane, outer side of the membraneOne of 4 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of cysteine and tyrosine (cytosol to extracellular)
- L-glutamate:L-cysteine gamma-ligase (ADP-forming)
Catalysed by PAH, SLC7A5, GCLC, GCLMcytosol, extracellular spaceOne of 2 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of lysine and tyrosine (cytosol to extracellular)
- L-lysine:oxygen 2-oxidoreductase (deaminating)
Catalysed by PAH, SLC7A6cytosol, extracellular space, peroxisome
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of glutamine and tyrosine (cytosol to extracellular)
- HCO3-:L-glutamine amido-ligase (ADP-forming, carbamate-phosphorylating)
Catalysed by PAH, SLC7A5, CADcytosol, extracellular spaceOne of 4 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of glycine and tyrosine (cytosol to extracellular)
- L-tyrosine + glyoxylate = 3-(4-hydroxyphenyl)pyruvate + glycine
Catalysed by PAH, SLC7A5, AADATcytosol, extracellular spaceOne of 5 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- transport of glycine and tyrosine (cytosol to extracellular)
- N(omega),N(omega)-dimethyl-L-arginine + glyoxylate = 5-(3,3-dimethylguanidino)-2-oxopentanoate + glycine
Catalysed by PAH, SLC7A5, AGXT2cytosol, extracellular spaceOne of 6 routes
- L-phenylalanine,tetrahydrobiopterin:oxygen oxidoreductase(4-hydroxylating)
- Acetylation of Tyrosine
- acyl-CoA:sphingosine N-acyltransferase
Catalysed by PAH, ASAH1, ACER2, ACER1 and 1 morecytosol, mitochondrial matrix, Golgi apparatusOne of 2 routes