L-citrulline
362,296 routes · scope human · up to 3 steps · built 5 October 2026 · Reactions · API
616 compounds within 3 steps: 22 in 1, 174 in 2, 420 in 3
Three steps
- transport of citrulline and glycine (cytosol to extracellular)
- gamma-L-glutamyl-L-cysteine + glycine + ATP = glutathione + ADP + phosphate + H(+)
- (12S)-hydroperoxy-(5Z,8Z,10E,14Z,17Z)-eicosapentaenoate + 2 glutathione = (12S)-hydroxy-(5Z,8Z,10E,14Z,17Z)-eicosapentaenoate + glutathione disulfide + H2O
Catalysed by SLC7A9, SLC3A1, SLC7A6, GSS and 2 moreextracellular space, cytosol
- transport of citrulline and glycine (cytosol to extracellular)
- gamma-L-glutamyl-L-cysteine + glycine + ATP = glutathione + ADP + phosphate + H(+)
- (15S)-hydroperoxy-(11Z,13E)-eicosadienoate + 2 glutathione = (15S)-hydroxy-(11Z,13E)-eicosadienoate + glutathione disulfide + H2O
Catalysed by SLC7A9, SLC3A1, SLC7A6, GSS and 2 moreextracellular space, cytosol
- transport of citrulline and glycine (cytosol to extracellular)
- gamma-L-glutamyl-L-cysteine + glycine + ATP = glutathione + ADP + phosphate + H(+)
- (17S)-hydroperoxy-(4Z,7Z,10Z,13Z,15E,19Z)-docosahexaenoate + 2 glutathione = (17S)-hydroxy-(4Z,7Z,10Z,13Z,15E,19Z)-docosahexaenoate + glutathione disulfide + H2O
Catalysed by SLC7A9, SLC3A1, SLC7A6, GSS and 2 moreextracellular space, cytosol
- transport of citrulline and glycine (cytosol to extracellular)
- gamma-L-glutamyl-L-cysteine + glycine + ATP = glutathione + ADP + phosphate + H(+)
- a hydroperoxy-1,2-diacyl-glycero-3-phosphocholine + 2 glutathione = a hydroxy-1,2-diacyl-glycero-3-phosphocholine + glutathione disulfide + H2O
Catalysed by SLC7A9, SLC3A1, SLC7A6, GSS and 1 moreextracellular space, cytosol
- Amino Acid-Polyamine-Organocation (Apc) Tcdb:2.A.3.8.15
- L-ornithine(out) + L-lysine(in) = L-ornithine(in) + L-lysine(out)
- biocytin + H2O = biotin + L-lysine
Catalysed by SLC7A9, SLC25A2, SLC25A15, BTDextracellular space, cytosol, inner side of the membrane, outer side of the membrane
- transport of citrulline and glycine (cytosol to extracellular)
- Glycodeoxycholate amidohydrolase
- glycodeoxycholate + 3'-phosphoadenylyl sulfate = glycodeoxycholate 3-sulfate + adenosine 3',5'-bisphosphate + H(+)
Catalysed by SLC7A9, SLC3A1, SLC7A6, SULT2A1extracellular space, cytosol
- transport of alanine and citrulline (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 3',5'-diiodo-L-thyronine + iodide + A + H(+) = 3,3',5'-triiodo-L-thyronine + AH2
Catalysed by SLC7A6, MOCOS, DIO3extracellular space, cytosol
- Amino Acid-Polyamine-Organocation (Apc) Tcdb:2.A.3.8.15
- N(omega),N(omega)-dimethyl-L-arginine(in) + L-ornithine(out) = N(omega),N(omega)-dimethyl-L-arginine(out) + L-ornithine(in)
- N(omega),N(omega)-dimethyl-L-arginine + pyruvate = 5-(3,3-dimethylguanidino)-2-oxopentanoate + L-alanine
Catalysed by SLC7A9, SLC25A2, AGXT2extracellular space, cytosol, inner side of the membrane, outer side of the membraneOne of 9 routes
- transport of alanine and citrulline (cytosol to extracellular)
- (R)-3-Amino-2-methylpropanoate:pyruvate aminotransferase
- N(omega),N('omega)-dimethyl-L-arginine + pyruvate = 5-(3,3'-dimethylguanidino)-2-oxopentanoate + L-alanine
Catalysed by SLC7A6, AGXT2extracellular space, cytosol, mitochondrial matrixOne of 4 routes
- transport of arginine and citrulline (cytosol to extracellular)
- N(omega)-methyl-L-arginine(in) + L-arginine(out) = N(omega)-methyl-L-arginine(out) + L-arginine(in)
- N(omega)-methyl-L-arginine + pyruvate = 5-(3-methylguanidino)-2-oxopentanoate + L-alanine
Catalysed by SLC7A5, SLC7A6, SLC25A29, AGXT2extracellular space, cytosol, inner side of the membrane, outer side of the membraneOne of 4 routes
- transport of citrulline and glycine (cytosol to extracellular)
- 5,10-Methylenetetrahydrofolate:glycine hydroxymethyltransferase
- 5,10-Methylenetetrahydrofolate:glycine hydroxymethyltransferase
Catalysed by SLC7A9, SLC3A1, SLC7A6, SHMT1extracellular space, cytosolOne of 7 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- acetyl-CoA C-acyltransferase (3-oxomyrist-7-enoyl-CoA)
Catalysed by SLC7A5, SLC7A6, HADHA, ACAA2 and 1 moreextracellular space, cytosol, mitochondrial matrixOne of 2 routes
- transport of alanine and citrulline (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 3-iodothyronamine + iodide + A + H(+) = 3,5-diiodothyronamine + AH2
Catalysed by SLC7A6, MOCOS, DIO1, DIO3extracellular space, cytosolOne of 2 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- long-chain-fatty-acid-CoA ligase (cis-cetoleic acid)
Catalysed by SLC7A5, SLC7A6, SLC27A2, ACSL4 and 6 moreextracellular space, cytosol, mitochondrial matrixOne of 5 routes
- transport of alanine and citrulline (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 3-iodo-L-thyronine + iodide + A + H(+) = 3,5-diiodo-L-thyronine + AH2
Catalysed by SLC7A6, MOCOS, DIO1, DIO3extracellular space, cytosolOne of 2 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- long-chain-fatty-acid-CoA ligase ((7Z)-tetradecenoic acid)
Catalysed by SLC7A5, SLC7A6, SLC27A2, ACSL4 and 6 moreextracellular space, cytosol, mitochondrial matrixOne of 8 routes
- transport of alanine and citrulline (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 3'-iodo-L-thyronine + iodide + A + H(+) = 3',5'-diiodo-L-thyronine + AH2
Catalysed by SLC7A6, MOCOS, DIO1, DIO2extracellular space, cytosolOne of 2 routes
- transport of alanine and citrulline (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- L-thyronine + iodide + A + H(+) = 3-iodo-L-thyronine + AH2
Catalysed by SLC7A6, MOCOS, DIO3extracellular space, cytosol
- transport of alanine and citrulline (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- thyronamine + iodide + A + H(+) = 3-iodothyronamine + AH2
Catalysed by SLC7A6, MOCOS, DIO3extracellular space, cytosol
- transport of alanine and citrulline (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 3'-iodothyronamine + iodide + A + H(+) = 3',5'-diiodothyronamine + AH2
Catalysed by SLC7A6, MOCOS, DIO1, DIO2extracellular space, cytosolOne of 2 routes
- transport of alanine and citrulline (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 3,3'-diiodothyronamine + iodide + A + H(+) = 3,3',5'-triiodothyronamine + AH2
Catalysed by SLC7A6, MOCOS, DIO1, DIO2extracellular space, cytosolOne of 2 routes
- transport of alanine and citrulline (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 3',5'-diiodothyronamine + iodide + A + H(+) = 3,3',5'-triiodothyronamine + AH2
Catalysed by SLC7A6, MOCOS, DIO3extracellular space, cytosol
- transport of alanine and citrulline (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- 3,3',5'-triiodothyronamine + iodide + A + H(+) = 3,3',5,5'-tetraiodothyronamine + AH2
Catalysed by SLC7A6, MOCOS, DIO3extracellular space, cytosol
- transport of citrulline and methionine (cytosol to extracellular)
- S-methyl-L-methionine + L-homocysteine = 2 L-methionine + H(+)
- L-homocysteine + ATP = L-homocysteine thiolactone + AMP + diphosphate
Catalysed by SLC7A6, BHMT2, MARS1extracellular space, cytosol
- transport of citrulline and methionine (cytosol to extracellular)
- S-methyl-L-methionine + L-homocysteine = 2 L-methionine + H(+)
- L-homocysteine + ATP + H(+) = L-homocysteinyl-AMP + diphosphate
Catalysed by SLC7A6, BHMT2, MARS1extracellular space, cytosol
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- Fatty Acid Beta Oxidation (C18:4->C16:4), Mitochondrial
Catalysed by SLC7A5, SLC7A6, HADHA, ACADVL and 1 moreextracellular space, cytosol, mitochondrial matrixOne of 3 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- Fatty Acid Beta Oxidation Trans (C18:2->C16:2), Mitochondrial
Catalysed by SLC7A5, SLC7A6, HADHA, ACADVL and 1 moreextracellular space, cytosol, mitochondrial matrix
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- Fatty Acid Beta Oxidation (C12:3->C10:2), Mitochondrial
Catalysed by SLC7A5, SLC7A6, ECHS1, ACAA2 and 1 moreextracellular space, cytosol, mitochondrial matrixOne of 2 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- Fatty Acid Beta Oxidation (C10:2->C8:1), Mitochondrial
Catalysed by SLC7A5, SLC7A6, ECHS1, ACAA2 and 1 moreextracellular space, cytosol, mitochondrial matrixOne of 2 routes
- transport of citrulline and glycine (cytosol to extracellular)
- gamma-L-glutamyl-L-cysteine + glycine + ATP = glutathione + ADP + phosphate + H(+)
- (E)-4-hydroxynon-2-enal + glutathione = 3-(glutathion-S-yl)-4-hydroxynonanal
Catalysed by SLC7A9, SLC3A1, SLC7A6, GSS and 1 moreextracellular space, cytosol
- transport of citrulline and glycine (cytosol to extracellular)
- glycine to glycoursodeoxycholate conversion
- glycoursodeoxycholate + 3'-phosphoadenylyl sulfate = glycoursodeoxycholate 3-sulfate + adenosine 3',5'-bisphosphate + H(+)
Catalysed by SLC7A9, SLC3A1, SLC7A6, SULT2A1extracellular space, cytosol
- transport of citrulline and glycine (cytosol to extracellular)
- chenodeoxycholoyl-CoA + glycine = glycochenodeoxycholate + CoA + H(+)
- glycochenodeoxycholate + 3'-phosphoadenylyl sulfate = glycochenodeoxycholate 3-sulfate + adenosine 3',5'-bisphosphate + H(+)
Catalysed by SLC7A9, SLC3A1, SLC7A6, BAAT and 1 moreextracellular space, cytosol
- transport of citrulline and glycine (cytosol to extracellular)
- Glycodeoxycholate amidohydrolase
- Glycodeoxycholate amidohydrolase
Catalysed by SLC7A9, SLC3A1, SLC7A6extracellular space, cytosol
- transport of alanine and citrulline (cytosol to extracellular)
- trans-4-hydroxy-L-proline(out) + L-alanine(in) + Na(+)(out) = trans-4-hydroxy-L-proline(in) + L-alanine(out) + Na(+)(in)
- trans-4-hydroxy-L-proline + a quinone = (3R,5S)-1-pyrroline-3-hydroxy-5-carboxylate + a quinol + H(+)
Catalysed by SLC7A6, SLC1A4, PRODH2extracellular space, cytosol, inner side of the membrane, outer side of the membraneOne of 4 routes
- transport of citrulline and lysine (cytosol to extracellular)
- transport of chloride and lysine (cytosol to extracellular)
- Peroxidase
Catalysed by SLC7A5, SLC7A6, SLC6A14, LPOextracellular space, cytosolOne of 4 routes
- L-Citrulline:L-aspartate ligase (AMP-forming)
- L-citrulline + L-aspartate + ATP = 2-(N(omega)-L-arginino)succinate + AMP + diphosphate + H(+)
- transport of aspartate (cytosol to extracellular)
Catalysed by ASS1, SLC1A7, SLC1A3, SLC1A2 and 2 morecytosol, extracellular spaceOne of 3 routes
- transport of citrulline and histidine (cytosol to extracellular)
- L-histidine carboxy-lyase (histamine-forming)
- amine oxidase copper containing (histamine)
Catalysed by SLC7A5, SLC7A6, HDC, AOC2 and 2 moreextracellular space, cytosolOne of 2 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- medium-chain acyl-CoA ligase (hexanoic acid)
Catalysed by SLC7A5, SLC7A6, ACSM4, ACSM1 and 4 moreextracellular space, cytosol, mitochondrial matrixOne of 6 routes
- transport of citrulline and threonine (cytosol to extracellular)
- L-threonine ammonia-lyase (2-oxobutanoate-forming)
- Selenomethionine methanethiol-lyase (deaminating)
Catalysed by SLC7A6, SDS, SDSL, CTHextracellular space, cytosol
- transport of alanine and citrulline (cytosol to extracellular)
- L-selenocysteine selenide-lyase (L-alanine-forming)
- Selenocystathionine Lysteine-lyase (deaminating)
Catalysed by SLC7A6, SCLY, CTHextracellular space, cytosolOne of 2 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- long-chain-fatty-acid-CoA ligase (elaidate)
Catalysed by SLC7A5, SLC7A6, SLC27A2, ACSL4 and 6 moreextracellular space, cytosol, mitochondrial matrixOne of 5 routes
- transport of citrulline and cysteine (cytosol to extracellular)
- cystine to cysteine conversion
- Glutathione: 5-HPETE oxidoreductase
Catalysed by SLC7A6, GPX5, GPX1, GPX2 and 6 moreextracellular space, cytosolOne of 2 routes
- transport of citrulline and phenylalanine (cytosol to extracellular)
- Phenylalanine Transaminase, Mitochondrial
- Phenylpyruvate:oxygen oxidoreductase (hydroxylating,decarboxylating)
Catalysed by SLC7A6, GOT2, TAT, HPDextracellular space, cytosol, mitochondrial matrix
- transport of citrulline and cysteine (cytosol to extracellular)
- L-Cysteine:2-oxoglutarate aminotransferase
- 3-Mercaptolactate:NAD+ oxidoreductase
Catalysed by SLC7A6, GOT2, GOT1, LDHB and 3 moreextracellular space, cytosol
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- Propanoyl-CoA:acetyl-CoA C-acyltransferase
Catalysed by SLC7A5, SLC7A6, ACAA1, SCP2 and 1 moreextracellular space, cytosol, mitochondrial matrix, peroxisomeOne of 7 routes
- transport of arginine and citrulline (cytosol to extracellular)
- L-cystine(out) + L-arginine(in) = L-cystine(in) + L-arginine(out)
- L-cystine thiocysteine-lyase (deaminating
Catalysed by SLC7A5, SLC7A6, SLC7A9, CTHextracellular space, cytosol, inner side of the membrane, outer side of the membrane
- transport of citrulline and glycine (cytosol to extracellular)
- Hippurate (Benzoylglycinate) Formation
- N-benzoylglycine(out) + a dicarboxylate(in) = N-benzoylglycine(in) + a dicarboxylate(out)
Catalysed by SLC7A9, SLC3A1, SLC7A6, SLC22A6 and 1 moreextracellular space, cytosol, mitochondrial matrix, inner side of the membrane, outer side of the membraneOne of 2 routes
- transport of citrulline and glycine (cytosol to extracellular)
- gamma-L-glutamyl-L-cysteine + glycine + ATP = glutathione + ADP + phosphate + H(+)
- L-dehydroascorbate + 2 glutathione = glutathione disulfide + L-ascorbate
Catalysed by SLC7A9, SLC3A1, SLC7A6, GSS and 3 moreextracellular space, cytosol
- transport of citrulline and histidine (cytosol to extracellular)
- Formation of homocarnosine
- Transport of Homocarnosine
Catalysed by SLC7A5, SLC7A6, CARNS1extracellular space, cytosolOne of 4 routes
- transport of citrulline and leucine (cytosol to extracellular)
- L-Leucine:2-oxoglutarate aminotransferase
- branched chain keto acid dehydrogenase E1 (4-methyl-2-oxopentanoate)
Catalysed by BCAT2, BCKDHA, BCKDHBextracellular space, cytosol, mitochondrial matrix