L-cysteine
362,296 routes · scope human · up to 3 steps · built 5 October 2026 · Reactions · API
1,087 compounds within 3 steps: 38 in 1, 363 in 2, 686 in 3
Three steps
- L-cysteine hydrogen-sulfide-lyase (deaminating
- transport of pyruvate and retinoate (cytosol to extracellular)
- cytochrome P450 (retinoate)
Catalysed by CTH, SLC16A4, SLC16A5, SLC16A3 and 4 morecytosol, extracellular spaceOne of 3 routes
- L-cysteine hydrogen-sulfide-lyase (deaminating
- transport of acetate and pyruvate (cytosol to extracellular)
- N-acetylcadaverine + H2O = cadaverine + acetate
Catalysed by CTH, SLC16A4, SLC16A5, SLC16A3 and 3 morecytosol, extracellular space
- cystine to cysteine conversion
- transport of arachidonate and GSH (cytosol to extracellular)
- unspecific monooxygenase (arachidonate)
Catalysed by CYP1A1, CYP1A2, CYP2E1, CYP3A4 and 22 morecytosol, extracellular spaceOne of 2 routes
- cystine to cysteine conversion
- transport of arachidonate and GSH (cytosol to extracellular)
- unspecific monooxygenase (arachidonate)
Catalysed by CYP1A1, CYP1A2, CYP2E1, CYP3A4 and 22 morecytosol, extracellular spaceOne of 2 routes
- L-cysteine hydrogen-sulfide-lyase (deaminating
- hydrogen sulfide + 2 O2 = sulfate + H(+)
- Steryl-Sulfatase
Catalysed by CTH, SOD1, STScytosol, Golgi apparatusOne of 2 routes
- cystine to cysteine conversion
- transport of arachidonate and GSH (cytosol to extracellular)
- (5Z,8Z,11Z,14Z)-eicosatetraenoate + reduced [NADPH--hemoprotein reductase] + O2 = 13(S)-hydroxy-(5Z,8Z,11Z,14Z)-eicosatetraenoate + oxidized [NADPH--hemoprotein reductase] + H2O + H(+)
Catalysed by CYP2C9cytosol, extracellular space
- transport of alanine and cysteine (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- (9Z,12Z)-octadecadienoate + AH2 + O2 = (13R)-hydroxy-(9Z,11E)-octadecadienoate + A + H2O
Catalysed by SLC7A5, MOCOS, PTGS1, PTGS2extracellular space, cytosol
- cystine to cysteine conversion
- transport of arachidonate and GSH (cytosol to extracellular)
- unspecific monooxygenase (arachidonate)
Catalysed by CYP1A1, CYP1A2, CYP2E1, CYP3A4 and 22 morecytosol, extracellular space
- transport of alanine and cysteine (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 2-(5Z,8Z,11Z,14Z)-eicosatetraenoyl-sn-glycero-3-phosphocholine + AH2 + O2 = 2-[(11R)-hydroxy-(5Z,8Z,12E,14Z)-eicosatetraenoyl]-sn-glycero-3-phosphocholine + A + H2O
Catalysed by SLC7A5, MOCOS, PTGS2extracellular space, cytosol
- transport of alanine and cysteine (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 2-(5Z,8Z,11Z,14Z)-eicosatetraenoyl-sn-glycero-3-phosphocholine + AH2 + O2 = 2-[(15R)-hydroxy-(5Z,8Z,11Z,13E)-eicosatetraenoyl]-sn-glycero-3-phosphocholine + A + H2O
Catalysed by SLC7A5, MOCOS, PTGS2extracellular space, cytosol
- transport of alanine and cysteine (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 2-(5Z,8Z,11Z,14Z)-eicosatetraenoyl-sn-glycero-3-phosphocholine + AH2 + O2 = 2-[(15S)-hydroxy-(5Z,8Z,11Z,13E)-eicosatetraenoyl]-sn-glycero-3-phosphocholine + A + H2O
Catalysed by SLC7A5, MOCOS, PTGS2extracellular space, cytosol
- transport of cysteine and glutamine (cytosol to extracellular)
- N(2)-formyl-N(1)-(5-phospho-beta-D-ribosyl)glycinamide + L-glutamine + ATP + H2O = 2-formamido-N(1)-(5-O-phospho-beta-D-ribosyl)acetamidine + L-glutamate + ADP + phosphate + H(+)
- 2-formamido-N(1)-(5-O-phospho-beta-D-ribosyl)acetamidine + ATP = 5-amino-1-(5-phospho-beta-D-ribosyl)imidazole + ADP + phosphate + H(+)
Catalysed by SLC3A2, SLC7A5, SLC7A10, PFAS and 1 moreextracellular space, cytosol
- transport of alanine and cysteine (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 2-(prostaglandin G2)-sn-glycero-3-phosphoethanolamine + AH2 = 2-(prostaglandin H2)-sn-glycero-3-phosphoethanolamine + A + H2O
Catalysed by SLC7A5, MOCOS, PTGS2extracellular space, cytosol
- transport of alanine and cysteine (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 2-(prostaglandin G2)-sn-glycero-3-phosphocholine + AH2 = 2-(prostaglandin H2)-sn-glycero-3-phosphocholine + A + H2O
Catalysed by SLC7A5, MOCOS, PTGS2extracellular space, cytosol
- transport of alanine and cysteine (cytosol to extracellular)
- gamma-glutamyltransferase (alanine)
- N-(4-oxoglutaryl)-L-cysteinylglycine + H2O = L-cysteinylglycine + 2-oxoglutarate
Catalysed by SLC7A5, GGTLC3, GGT1, GGT5 and 4 moreextracellular space, cytosol
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- medium-chain acyl-CoA ligase (decanoic acid)
- decanoyl-CoA + 2-oxoglutarate + O2 = 2-hydroxydecanoyl-CoA + succinate + CO2
Catalysed by NAGS, ACSM4, ACSM1, ACSM2A and 4 moremitochondrial matrix, cytosol
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase (eicosanoate)
- eicosanoyl-CoA + 2-oxoglutarate + O2 = 2-hydroxyeicosanoyl-CoA + succinate + CO2
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 6 moremitochondrial matrix, cytosol
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase (lauric acid)
- dodecanoyl-CoA + 2-oxoglutarate + O2 = 2-hydroxydodecanoyl-CoA + succinate + CO2
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 6 moremitochondrial matrix, cytosol
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase (myristic acid)
- tetradecanoyl-CoA + 2-oxoglutarate + O2 = 2-hydroxytetradecanoyl-CoA + succinate + CO2
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 6 moremitochondrial matrix, cytosol
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase (myristic acid)
- 11-cis-retinol + tetradecanoyl-CoA = 11-cis-retinyl tetradecanoate + CoA
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 6 moremitochondrial matrix, cytosolOne of 2 routes
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase (myristic acid)
- 9-cis-retinol + tetradecanoyl-CoA = 9-cis-retinyl tetradecanoate + CoA
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 6 moremitochondrial matrix, cytosol
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase (myristic acid)
- 13-cis-retinol + tetradecanoyl-CoA = 13-cis-retinyl tetradecanoate + CoA
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 6 moremitochondrial matrix, cytosol
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase (myristic acid)
- all-trans-retinol + tetradecanoyl-CoA = all-trans-retinyl tetradecanoate + CoA
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 6 moremitochondrial matrix, cytosolOne of 2 routes
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase (myristic acid)
- tetradecan-1-ol + tetradecanoyl-CoA = tetradecyl tetradecanoate + CoA
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 6 moremitochondrial matrix, cytosol
- 1-(9Z-octadecenoyl)-2-(4Z,7Z,10Z,13Z,16Z,19Z-docosahexaenoyl)-sn-glycero-3-phosphateReach from here →
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase (DHA)
- (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoyl-CoA + 1-(9Z-octadecenoyl)-sn-glycero-3-phosphate = 1-(9Z-octadecenoyl)-2-(4Z,7Z,10Z,13Z,16Z,19Z-docosahexaenoyl)-sn-glycero-3-phosphate + CoA
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 6 moremitochondrial matrix, cytosol
- L-cysteine hydrogen-sulfide-lyase (deaminating
- transport of pyruvate and retinoate (cytosol to extracellular)
- glucuronosyltransferase (retinoate)
Catalysed by CTH, SLC16A4, SLC16A5, SLC16A3 and 6 morecytosol, extracellular space, endoplasmic reticulum
- L-cysteine hydrogen-sulfide-lyase (deaminating
- transport of pyruvate and retinoate (cytosol to extracellular)
- unspecific monooxygenase (retinoate)
Catalysed by CTH, SLC16A4, SLC16A5, SLC16A3 and 28 morecytosol, extracellular spaceOne of 2 routes
- L-cysteine hydrogen-sulfide-lyase (deaminating
- transport of acetate and pyruvate (cytosol to extracellular)
- a phenyl acetate + H2O = a phenol + acetate + H(+)
Catalysed by CTH, SLC16A4, SLC16A5, SLC16A3 and 5 morecytosol, extracellular space
- transport of cysteine and glycine (cytosol to extracellular)
- glycine + 2-oxoglutarate = glyoxylate + L-glutamate
- N-octanoyl-(2S)-hydroxyglycine = octanamide + glyoxylate
Catalysed by SLC3A2, SLC7A5, SLC7A8, AADAT and 1 moreextracellular space, cytosolOne of 2 routes
- transport of cysteine and glycine (cytosol to extracellular)
- glycine + 2-oxoglutarate = glyoxylate + L-glutamate
- N-decanoyl-(2S)-hydroxyglycine = decanamide + glyoxylate
Catalysed by SLC3A2, SLC7A5, SLC7A8, AADAT and 1 moreextracellular space, cytosolOne of 2 routes
- transport of cysteine and glycine (cytosol to extracellular)
- glycine + 2-oxoglutarate = glyoxylate + L-glutamate
- N-dodecanoyl-(2S)-hydroxyglycine = dodecanamide + glyoxylate
Catalysed by SLC3A2, SLC7A5, SLC7A8, AADAT and 1 moreextracellular space, cytosolOne of 2 routes
- transport of cysteine and glycine (cytosol to extracellular)
- glycine + 2-oxoglutarate = glyoxylate + L-glutamate
- N-tetradecanoyl-(2S)-hydroxyglycine = tetradecamide + glyoxylate
Catalysed by SLC3A2, SLC7A5, SLC7A8, AADAT and 1 moreextracellular space, cytosolOne of 2 routes
- transport of cysteine and glycine (cytosol to extracellular)
- glycine + 2-oxoglutarate = glyoxylate + L-glutamate
- N-(9Z-octadecenoyl)-(2S)-hydroxyglycine = (9Z)-octadecenamide + glyoxylate
Catalysed by SLC3A2, SLC7A5, SLC7A8, AADAT and 1 moreextracellular space, cytosolOne of 2 routes
- transport of cysteine and glycine (cytosol to extracellular)
- glycine + 2-oxoglutarate = glyoxylate + L-glutamate
- N-(9Z,12Z,15Z)-octadecatrienoyl-(2S)-hydroxyglycine = (9Z,12Z,15Z)-octadecatrienamide + glyoxylate
Catalysed by SLC3A2, SLC7A5, SLC7A8, AADAT and 1 moreextracellular space, cytosol
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase (stearate)
- a sphingoid base + octadecanoyl-CoA = an N-octadecanoyl-sphingoid base + CoA + H(+)
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 5 moremitochondrial matrix, cytosol
- transport of cysteine and glutamine (cytosol to extracellular)
- D-fructose 6-phosphate + L-glutamine = D-glucosamine 6-phosphate + L-glutamate
- D-glucosamine 6-phosphate + NADP(+) = 2-amino-2-deoxy-6-phospho-D-glucono-1,5-lactone + NADPH + 2 H(+)
Catalysed by SLC3A2, SLC7A5, SLC7A10, GFPT2 and 2 moreextracellular space, cytosol
- transport of cysteine and glycine (cytosol to extracellular)
- glycyldehydrophenylalanine + H2O = 2,3-didehydrophenylalanine + glycine
- glycyldehydrophenylalanine + H2O = 2,3-didehydrophenylalanine + glycine
Catalysed by SLC3A2, SLC7A5, SLC7A8, DPEP1extracellular space, cytosol
- cystine to cysteine conversion
- transport of arachidonate and GSH (cytosol to extracellular)
- arachidonate to 8-peroxy-(5Z,9E,11Z,14Z)-eicosatetraenoate conversion
No catalyst recordedcytosol, extracellular spaceOne of 2 routes
- transport of cysteine and glycine (cytosol to extracellular)
- 5-phospho-beta-D-ribosylamine + glycine + ATP = N(1)-(5-phospho-beta-D-ribosyl)glycinamide + ADP + phosphate + H(+)
- N(1)-(5-phospho-beta-D-ribosyl)glycinamide + (6R)-10-formyltetrahydrofolate = N(2)-formyl-N(1)-(5-phospho-beta-D-ribosyl)glycinamide + (6S)-5,6,7,8-tetrahydrofolate + H(+)
Catalysed by SLC3A2, SLC7A5, SLC7A8, GARTextracellular space, cytosol
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- long-chain-fatty-acid-CoA ligase ((6Z,9Z)-octadecadienoic acid)
- 1-(10Z-heptadecenoyl)-sn-glycero-3-phosphoethanolamine + (9Z,12Z)-octadecadienoyl-CoA = 1-(10Z-heptadecenoyl)-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphoethanolamine + CoA
Catalysed by NAGS, SLC27A2, ACSL4, ACSL3 and 6 moremitochondrial matrix, cytosol
- N-acetylglutamate synthase (N-acetyl-L-cysteine)
- carnitine O-palmitoyltransferase ((7Z)-octadecenoyl-CoA)
- (7Z)-octadecenoyl-CoA + cholesterol = cholesteryl (7Z)-octadecenoate + CoA
Catalysed by NAGS, CPT1A, CPT1C, CPT1B and 1 moremitochondrial matrix, cytosol