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 lysine (cytosol to extracellular)
- Acetylation of Lysine
- propanoyl-CoA C-acyltransferase (3-ketopristanoyl-CoA)
Catalysed by SLC7A5, SLC7A6, ACAA1, MYO5Bextracellular space, cytosol, mitochondrial matrix, peroxisomeOne of 2 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- long-chain-fatty-acid-CoA ligase (gamma-linolenate)
Catalysed by SLC7A5, SLC7A6, SLC27A2, ACSL4 and 6 moreextracellular space, cytosol, mitochondrial matrixOne of 7 routes
- transport of citrulline and glycine (cytosol to extracellular)
- Hippurate (Benzoylglycinate) Formation
- benzoyl-CoA + glycine = N-benzoylglycine + CoA + H(+)
Catalysed by SLC7A9, SLC3A1, SLC7A6, GLYATextracellular space, cytosol, mitochondrial matrix
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- Butanoate:CoA ligase (AMP-forming)
Catalysed by SLC7A5, SLC7A6, ACSM4, ACSM1 and 4 moreextracellular space, cytosol, mitochondrial matrixOne of 9 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- long-chain-fatty-acid-CoA ligase (lauric acid)
Catalysed by SLC7A5, SLC7A6, SLC27A2, ACSL4 and 6 moreextracellular space, cytosol, mitochondrial matrixOne of 10 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- Production of Glutaryl Carnitine
Catalysed by SLC7A5, SLC7A6, CPT1A, CPT1C and 1 moreextracellular space, cytosol, mitochondrial matrixOne of 2 routes
- transport of citrulline and glycine (cytosol to extracellular)
- hexadecanoyl-CoA + glycine = N-hexadecanoylglycine + CoA + H(+)
- hexadecanoyl-CoA + glycine = N-hexadecanoylglycine + CoA + H(+)
Catalysed by SLC7A9, SLC3A1, SLC7A6, GLYATL3extracellular space, cytosol
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- long-chain-fatty-acid-CoA ligase (eicosanoate)
Catalysed by SLC7A5, SLC7A6, SLC27A2, ACSL4 and 6 moreextracellular space, cytosol, mitochondrial matrixOne of 12 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- Itaconate:CoA ligase (GDP-forming)
Catalysed by SLC7A5, SLC7A6, SUCLG1, SUCLG2 and 1 moreextracellular space, cytosol, mitochondrial matrixOne of 2 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- long-chain-fatty-acid-CoA ligase ((6Z,9Z)-octadecadienoic acid)
Catalysed by SLC7A5, SLC7A6, SLC27A2, ACSL4 and 6 moreextracellular space, cytosol, mitochondrial matrixOne of 14 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- long-chain-fatty-acid-CoA ligase (myristic acid)
Catalysed by SLC7A5, SLC7A6, SLC27A2, ACSL4 and 6 moreextracellular space, cytosol, mitochondrial matrixOne of 12 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- Octanoyl-CoA:L-carnitine O-octanoyltransferase
Catalysed by SLC7A5, SLC7A6, CROTextracellular space, cytosol, mitochondrial matrixOne of 21 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- phytanate-CoA ligase
Catalysed by SLC7A5, SLC7A6extracellular space, cytosol, mitochondrial matrixOne of 5 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- long-chain-fatty-acid-CoA ligase (stearate)
Catalysed by SLC7A5, SLC7A6, SLC27A2, ACSL4 and 5 moreextracellular space, cytosol, mitochondrial matrixOne of 15 routes
- transport of citrulline and cysteine (cytosol to extracellular)
- cystine to cysteine conversion
- transport of GSH and prostaglandin E1 (cytosol to extracellular)
Catalysed by SLC7A6, SLCO2A1extracellular space, cytosolOne of 2 routes
- transport of citrulline and cysteine (cytosol to extracellular)
- cystine to cysteine conversion
- transport of GSH and prostaglandin I2 (cytosol to extracellular)
Catalysed by SLC7A6, SLCO2A1extracellular space, cytosolOne of 2 routes
- transport of citrulline and cysteine (cytosol to extracellular)
- cystine to cysteine conversion
- transport of GSH and prostaglandin F2alpha (cytosol to extracellular)
Catalysed by SLC7A6, SLCO2A1extracellular 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
- (5Z,8Z,11Z,14Z)-eicosatetraenoate + AH2 + 2 O2 = prostaglandin H2 + A + H2O
Catalysed by SLC7A6, MOCOS, PTGS1, PTGS2extracellular space, cytosolOne of 4 routes
- transport of citrulline and cysteine (cytosol to extracellular)
- cystine to cysteine conversion
- transport of GSH and prostaglandin D2 (cytosol to extracellular)
Catalysed by SLC7A6, SLCO2A1extracellular 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
- (15S)-hydroperoxy-(5Z,8Z,11Z,13E)-eicosatetraenoate + AH2 = (15S)-hydroxy-(5Z,8Z,11Z,13E)-eicosatetraenoate + A + H2O
Catalysed by SLC7A6, MOCOS, TBXAS1, PTGS2 and 1 moreextracellular space, cytosolOne of 3 routes
- transport of citrulline and cysteine (cytosol to extracellular)
- Mo-molybdopterin + L-cysteine + AH2 = thio-Mo-molybdopterin + L-alanine + A + H2O
- uridine(34) in tRNA + 5,10-methylenetetrahydrofolate + taurine + GTP + A + H2O = 5-taurinomethyluridine(34) in tRNA + 7,8-dihydrofolate + GDP + AH2 + phosphate + H(+)
Catalysed by SLC7A6, MOCOS, MTO1extracellular space, cytosolOne of 4 routes
- transport of citrulline and glycine (cytosol to extracellular)
- 5,10-Methylenetetrahydrofolate:glycine hydroxymethyltransferase
- 5-Formiminotetrahydrofolate:L-glutamate N-formiminotransferase
Catalysed by SLC7A9, SLC3A1, SLC7A6, SHMT1 and 1 moreextracellular space, cytosolOne of 2 routes
- transport of citrulline and cysteine (cytosol to extracellular)
- cystine to cysteine conversion
- transport of GSH and leukotriene A4 (cytosol to extracellular)
Catalysed by SLC7A6, SLCO2A1extracellular space, cytosolOne of 3 routes
- transport of citrulline and cysteine (cytosol to extracellular)
- cystine to cysteine conversion
- (R)-S-Lactoylglutathione methylglyoxal-lyase (isomerizing)
Catalysed by SLC7A6, GLO1, GLOD4extracellular space, cytosolOne of 3 routes
- Amino Acid-Polyamine-Organocation (Apc) Tcdb:2.A.3.8.15
- L-histidine(in) + L-ornithine(out) + H(+)(in) = L-histidine(out) + L-ornithine(in) + H(+)(out)
- beta-alanine + L-histidine + ATP = carnosine + ADP + phosphate + H(+)
Catalysed by SLC7A9, SLC25A2, CARNS1extracellular space, cytosol, inner side of the membrane, outer side of the membraneOne of 2 routes
- transport of citrulline and glycine (cytosol to extracellular)
- glycine + 2-oxoglutarate = glyoxylate + L-glutamate
- L-2-aminoadipate + glyoxylate = 2-oxoadipate + glycine
Catalysed by SLC7A9, SLC3A1, SLC7A6, AADATextracellular space, cytosol
- transport of citrulline and tyrosine (cytosol to extracellular)
- thyroid peroxidase (iodine)
- thyroid peroxidase (3-iodo-L-tyrosine)
Catalysed by SLC7A6, TPOextracellular space, cytosolOne of 2 routes
- transport of citrulline and glutamine (cytosol to extracellular)
- L-glutamine:D-fructose-6-phosphate isomerase (deaminating)
- acetyl-CoA:D-glucosamine-6-phosphate N-acetyltransferase
Catalysed by SLC7A6, GFPT2, GFPT1, GNPNAT1extracellular space, cytosolOne of 3 routes
- transport of citrulline and glutamine (cytosol to extracellular)
- L-glutamine:D-fructose-6-phosphate isomerase (deaminating)
- alpha-D-glucosamine 6-phosphate + H2O = beta-D-fructose 6-phosphate + NH4(+)
Catalysed by SLC7A6, GFPT2, GFPT1, GNPDA1 and 1 moreextracellular space, cytosol
- transport of citrulline and cysteine (cytosol to extracellular)
- cystine to cysteine conversion
- alcohol dehydrogenase (formaldehyde)
Catalysed by SLC7A6, ADH1C, ADH1A, ADH5 and 3 moreextracellular space, cytosolOne of 2 routes
- transport of alanine and citrulline (cytosol to extracellular)
- (R)-3-Amino-2-methylpropanoate:pyruvate aminotransferase
- (R)-3-amino-2-methylpropanoate + pyruvate = 2-methyl-3-oxopropanoate + L-alanine
Catalysed by SLC7A6, AGXT2extracellular space, cytosol, mitochondrial matrix
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- acyl-CoA:sphingosine N-acyltransferase
Catalysed by SLC7A5, SLC7A6, ASAH1, ACER2 and 2 moreextracellular space, cytosol, mitochondrial matrix, Golgi apparatusOne of 2 routes
- Amino Acid-Polyamine-Organocation (Apc) Tcdb:2.A.3.8.15
- L-ornithine carboxy-lyase (putrescine-forming)
- S-adenosylmethioninamine:putrescine 3-aminopropyltransferase
Catalysed by SLC7A9, ODC1, SRMextracellular space, cytosolOne of 8 routes
- transport of citrulline and cysteine (cytosol to extracellular)
- L-Cysteine:oxygen oxidoreductase
- 3-sulfino-L-alanine + H(+) = hypotaurine + CO2
Catalysed by SLC7A6, CDO1, GADL1, CSADextracellular space, cytosol
- Carbamoyl-phosphate:L-ornithine carbamoyltransferase
- glucose-6-phosphatase (carbamoyl-phosphate)
- D-glucose-6-phosphate:NADP+ 1-oxidoreductase
Catalysed by OTC, G6PC2, G6PDmitochondrial matrix, endoplasmic reticulumOne of 3 routes
- 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)
- Nomega,Nomega'-dimethyl-L-arginine dimethylamidohydrolase
Catalysed by SLC7A9, SLC25A2, DDAH1extracellular space, cytosol, inner side of the membrane, outer side of the membraneOne of 2 routes
- transport of citrulline and glycine (cytosol to extracellular)
- succinyl-CoA:glycine C-succinyltransferase (decarboxylating)
- 5-aminolevulinate hydro-lyase (adding 5-aminolevulinate and cyclizing
Catalysed by SLC7A9, SLC3A1, SLC7A6, ALAS1 and 3 moreextracellular space, cytosol, mitochondrial matrixOne of 2 routes
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- N-acetylglutamate synthase (N-acetyl-L-cystathionine)
Catalysed by SLC7A5, SLC7A6, NAGSextracellular space, cytosol, mitochondrial matrixOne of 2 routes
- transport of citrulline and methionine (cytosol to extracellular)
- S-methyl-L-methionine + L-homocysteine = 2 L-methionine + H(+)
- L-homocysteine + glycine betaine = N,N-dimethylglycine + L-methionine
Catalysed by SLC7A6, BHMT2, BHMTextracellular space, cytosolOne of 2 routes
- Amino Acid-Polyamine-Organocation (Apc) Tcdb:2.A.3.8.15
- L-ornithine carboxy-lyase (putrescine-forming)
- acetyl-CoA:putrescine N-acetyltransferase
Catalysed by SLC7A9, ODC1, SAT1, SAT2extracellular space, cytosolOne of 2 routes
- Amino Acid-Polyamine-Organocation (Apc) Tcdb:2.A.3.8.15
- L-ornithine + 2-oxoglutarate = L-glutamate 5-semialdehyde + L-glutamate
- L-glutamate 5-semialdehyde + phosphate + NADP(+) = L-glutamyl 5-phosphate + NADPH + H(+)
Catalysed by SLC7A9, OAT, ALDH18A1extracellular space, cytosol
- transport of arginine and citrulline (cytosol to extracellular)
- L-cystine(out) + L-arginine(in) = L-cystine(in) + L-arginine(out)
- cystine to cysteine conversion
Catalysed by SLC7A5, SLC7A6, SLC7A9extracellular space, cytosol, inner side of the membrane, outer side of the membraneOne of 36 routes
- transport of citrulline and cysteine (cytosol to extracellular)
- cystine to cysteine conversion
- transport of GSH and sulfotaurolithocholate (cytosol to extracellular)
Catalysed by SLC7A6, SLCO1A2, SLCO1B3extracellular space, cytosolOne of 2 routes
- transport of citrulline and lysine (cytosol to extracellular)
- N6-(L-1,3-Dicarboxypropyl)-L-lysine:NADP+ oxidoreductase (L-lysine-forming)
- L-saccharopine + NAD(+) + H2O = (S)-2-amino-6-oxohexanoate + L-glutamate + NADH + H(+)
Catalysed by SLC7A5, SLC7A6, AASSextracellular space, cytosol, mitochondrial matrix
- transport of citrulline and lysine (cytosol to extracellular)
- Acetylation of Lysine
- acyl-CoA:sphingosine N-acyltransferase
Catalysed by SLC7A5, SLC7A6, ASAH1, ACER2 and 2 moreextracellular space, cytosol, mitochondrial matrix, Golgi apparatusOne of 3 routes