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Record Information
Version5.0
StatusDetected but not Quantified
Creation Date2005-11-16 15:48:42 UTC
Update Date2022-09-22 18:34:15 UTC
HMDB IDHMDB0000856
Secondary Accession Numbers
  • HMDB00856
Metabolite Identification
Common NameN-alpha-Acetyl-L-citrulline
DescriptionN-alpha-Acetyl-L-citrulline, also known as N-acetylcitrulline, is an N-acetylated metabolite of citrulline that is part of the arginine biosynthetic pathway. Arginine biosynthesis is notable for its complexity and variability at the genetic level, and by its connection with several other pathways, such as pyrimidine and polyamine biosynthesis, and certain degradative pathways. The initial steps of the arginine biosynthetic pathways proceed via N-acetylated intermediates. The presumed reason for this is that the acetylation prevents the spontaneous cyclization of glutamate derivatives, which leads to proline biosynthesis. N-acetyl-L-ornithine can be transcarbamylated directly by the enzyme acetylornithine transcarbamylase, resulting in N-acetyl-L-citrulline. The enzyme acetylornithine deacetylase can accept N-acetyl-L-citrulline as a substrate and can deacetylate it into citrulline. N-alpha-Acetyl-L-citrulline is found in cases of deficiency of the urea cycle enzyme argininosuccinate synthase (EC 6.3.4.5) that leads to increased concentrations of citrulline and N-acetylcitrulline in the urine (PMID: 14633929 ).
Structure
Thumb
Synonyms
ValueSource
(2S)-2-(Acetylamino)-5-[(aminocarbonyl)amino]pentanoic acidChEBI
(S)-2-ACETAMIDO-5-ureidopentanoIC ACIDChEBI
(2S)-2-(Acetylamino)-5-[(aminocarbonyl)amino]pentanoateGenerator
(S)-2-ACETAMIDO-5-ureidopentanoateGenerator
N-a-Acetyl-L-citrullineGenerator
N-Α-acetyl-L-citrullineGenerator
N-Acetyl-L-citrullineHMDB
N2-Acetyl-N5-(aminocarbonyl)-L-ornithineHMDB
Nalpha-acetyl-L-citrullineHMDB
Nalpha-acetylcitrullineHMDB
Nα-acetyl-L-citrullineHMDB
Nα-acetylcitrullineHMDB
alpha-N-AcetylcitrullineHMDB
Α-N-acetylcitrullineHMDB
Chemical FormulaC8H15N3O4
Average Molecular Weight217.2224
Monoisotopic Molecular Weight217.106255983
IUPAC Name(2S)-5-(carbamoylamino)-2-acetamidopentanoic acid
Traditional NameN-acetyl-L-citrulline
CAS Registry Number33965-42-3
SMILES
CC(=O)N[C@@H](CCCNC(N)=O)C(O)=O
InChI Identifier
InChI=1S/C8H15N3O4/c1-5(12)11-6(7(13)14)3-2-4-10-8(9)15/h6H,2-4H2,1H3,(H,11,12)(H,13,14)(H3,9,10,15)/t6-/m0/s1
InChI KeyWMQMIOYQXNRROC-LURJTMIESA-N
Chemical Taxonomy
Description Belongs to the class of organic compounds known as n-acyl-l-alpha-amino acids. These are n-acylated alpha amino acids which have the L-configuration of the alpha-carbon atom.
KingdomOrganic compounds
Super ClassOrganic acids and derivatives
ClassCarboxylic acids and derivatives
Sub ClassAmino acids, peptides, and analogues
Direct ParentN-acyl-L-alpha-amino acids
Alternative Parents
Substituents
  • N-acyl-l-alpha-amino acid
  • Fatty acid
  • Acetamide
  • Carboxamide group
  • Carbonic acid derivative
  • Secondary carboxylic acid amide
  • Urea
  • Carboxylic acid
  • Monocarboxylic acid or derivatives
  • Organopnictogen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Organic oxygen compound
  • Carbonyl group
  • Organic nitrogen compound
  • Organic oxide
  • Hydrocarbon derivative
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Ontology
Physiological effectNot Available
Disposition
ProcessNot Available
RoleNot Available
Physical Properties
StateSolid
Experimental Molecular Properties
PropertyValueReference
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Experimental Chromatographic PropertiesNot Available
Predicted Molecular Properties
Predicted Chromatographic Properties
Spectra
Biological Properties
Cellular Locations
  • Cytoplasm
Biospecimen Locations
  • Blood
  • Feces
  • Urine
Tissue LocationsNot Available
Pathways
Normal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
FecesDetected but not QuantifiedNot QuantifiedAdult (>18 years old)Both
Normal
details
FecesDetected but not QuantifiedNot QuantifiedAdult (>18 years old)Both
Normal
details
Abnormal Concentrations
BiospecimenStatusValueAgeSexConditionReferenceDetails
BloodExpected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedCancer patients undergoing total body irradiation details
UrineDetected but not QuantifiedNot QuantifiedNot SpecifiedNot SpecifiedCancer patients undergoing total body irradiation details
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDDB02368
Phenol Explorer Compound IDNot Available
FooDB IDFDB031018
KNApSAcK IDNot Available
Chemspider ID571213
KEGG Compound IDC15532
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkNot Available
METLIN IDNot Available
PubChem Compound656979
PDB IDNot Available
ChEBI ID49002
Food Biomarker OntologyNot Available
VMH IDNACCITR_L
MarkerDB IDNot Available
Good Scents IDNot Available
References
Synthesis Reference Shi, Dashuang; Morizono, Hiroki; Yu, Xiaolin; Roth, Lauren; Caldovic, Ljubica; Allewell, Norma M.; Malamy, Michael H.; Tuchman, Mendel. Crystal Structure of N-Acetylornithine Transcarbamylase from Xanthomonas campestris: A novel enzyme in a new arginine biosynthetic pathway found in several eubacteria. Journal of Biological Chemistry (2005), 280(15), 14366-14369. (Biosynthetic preparation)
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Engelke UF, Liebrand-van Sambeek ML, de Jong JG, Leroy JG, Morava E, Smeitink JA, Wevers RA: N-acetylated metabolites in urine: proton nuclear magnetic resonance spectroscopic study on patients with inborn errors of metabolism. Clin Chem. 2004 Jan;50(1):58-66. Epub 2003 Nov 18. [PubMed:14633929 ]