Record Information
Version1.0
StatusDetected and Quantified
Creation Date2020-12-10 18:36:27 UTC
Update Date2022-08-31 06:02:54 UTC
Metabolite IDMMDBc0000378
Metabolite Identification
Common NameCitrulline
DescriptionCitrulline, also known as Cit or δ-ureidonorvaline, belongs to the class of organic compounds known as l-alpha-amino acids. These are alpha amino acids which have the L-configuration of the alpha-carbon atom. Citrulline has the formula H2NC(O)NH(CH2)3CH(NH2)CO2H. Citrulline exists in all living species, ranging from bacteria to humans. Within humans, citrulline participates in a number of enzymatic reactions. In particular, citrulline can be biosynthesized from carbamoyl phosphate and ornithine which is catalyzed by the enzyme ornithine carbamoyltransferase. In addition, citrulline and L-aspartic acid can be converted into argininosuccinic acid through the action of the enzyme argininosuccinate synthase. In humans, citrulline is involved in the metabolic disorder called argininemia. Citrulline has also been found to be associated with several diseases such as ulcerative colitis, rheumatoid arthritis, and citrullinemia type II. Citrulline has also been linked to several inborn metabolic disorders including argininosuccinic aciduria and fumarase deficiency. Outside of the human body, citrulline is found, on average, in the highest concentration in a few different foods such as wheats, oats, and cucumbers and in a lower concentration in swiss chards, yellow wax beans, and potato. Citrulline has also been detected, but not quantified in several different foods, such as epazotes, lotus, common buckwheats, strawberry guava, and italian sweet red peppers. Citrulline is a potentially toxic compound. Proteins that normally contain citrulline residues include myelin basic protein (MBP), filaggrin, and several histone proteins, whereas other proteins, such as fibrin and vimentin are susceptible to citrullination during cell death and tissue inflammation. Citrulline is also produced as a byproduct of the enzymatic production of nitric oxide from the amino acid arginine, catalyzed by nitric oxide synthase. It is also produced from arginine as a byproduct of the reaction catalyzed by NOS family (NOS; EC1.14.13.39).
Structure
Synonyms
ValueSource
(S)-2-Amino-5-ureidopentanoic acidChEBI
2-Amino-5-ureidovaleric acidChEBI
alpha-Amino-delta-ureidovaleric acidChEBI
CitChEBI
delta-UreidonorvalineChEBI
L-2-Amino-5-ureidovaleric acidChEBI
N(5)-(Aminocarbonyl)-L-ornithineChEBI
N5-(Aminocarbonyl)ornithineChEBI
N5-CarbamoylornithineChEBI
N(delta)-CarbamylornithineChEBI
(S)-2-Amino-5-ureidopentanoateGenerator
2-Amino-5-ureidovalerateGenerator
a-Amino-delta-ureidovalerateGenerator
a-Amino-delta-ureidovaleric acidGenerator
alpha-Amino-delta-ureidovalerateGenerator
Α-amino-δ-ureidovalerateGenerator
Α-amino-δ-ureidovaleric acidGenerator
Δ-ureidonorvalineGenerator
L-2-Amino-5-ureidovalerateGenerator
N(Δ)-carbamylornithineGenerator
a-Amino-δ-ureidovalerateHMDB
a-Amino-δ-ureidovaleric acidHMDB
(2S)-2-Amino-5-(carbamoylamino)pentanoateHMDB
(2S)-2-Amino-5-(carbamoylamino)pentanoic acidHMDB
(S)-2-Amino-5-(aminocarbonyl)aminopentanoateHMDB
(S)-2-Amino-5-(aminocarbonyl)aminopentanoic acidHMDB
2-Amino-5-uredovalerateHMDB
2-Amino-5-uredovaleric acidHMDB
a-Amino-D-ureidovalerateHMDB
a-Amino-D-ureidovaleric acidHMDB
alpha-Amino-gamma-ureidovalerateHMDB
alpha-Amino-gamma-ureidovaleric acidHMDB
Amino-ureidovalerateHMDB
Amino-ureidovaleric acidHMDB
CIRHMDB
CytrullineHMDB
D-UreidonorvalineHMDB
DL-CitrullineHMDB
GammaureidonorvalineHMDB
H-Cit-OHHMDB
L(+)-2-Amino-5-ureidovalerateHMDB
L(+)-2-Amino-5-ureidovaleric acidHMDB
L(+)-CitrullineHMDB
L-2-Amino-5-ureido-valerateHMDB
L-2-Amino-5-ureido-valeric acidHMDB
L-CitrullineHMDB
L-CytrullineHMDB
L-N5-Carbamoyl-ornithineHMDB
N()-CarbamylornithineHMDB
N(5)-(Aminocarbonyl)-DL-ornithineHMDB
N-CarbamylornithineHMDB
N5-(Aminocarbonyl)-L-ornithineHMDB
N5-(Aminocarbonyl)-ornithineHMDB
N5-Carbamoyl-L-ornithineHMDB
N5-CarbamylornithineHMDB
ND-CarbamylornithineHMDB
Ndelta-carbamy-ornithineHMDB
Ndelta-carbamylornithineHMDB
Ngamma-carbamylornithineHMDB
SitrullineHMDB
UreidonorvalineHMDB
UreidovalerateHMDB
Ureidovaleric acidHMDB
Molecular FormulaC6H13N3O3
Average Mass175.1857
Monoisotopic Mass175.095691297
IUPAC Name(2S)-2-amino-5-(carbamoylamino)pentanoic acid
Traditional NameL-citrulline
CAS Registry NumberNot Available
SMILES
N[C@@H](CCCNC(N)=O)C(O)=O
InChI Identifier
InChI=1S/C6H13N3O3/c7-4(5(10)11)2-1-3-9-6(8)12/h4H,1-3,7H2,(H,10,11)(H3,8,9,12)/t4-/m0/s1
InChI KeyRHGKLRLOHDJJDR-BYPYZUCNSA-N