Record Information
Version1.0
StatusDetected and Quantified
Creation Date2020-12-10 18:37:44 UTC
Update Date2024-04-30 19:32:25 UTC
Metabolite IDMMDBc0000437
Metabolite Identification
Common NameN-Acetylasparagine
DescriptionN-Acetyl-L-asparagine or N-Acetylasparagine, belongs to the class of organic compounds known as N-acyl-alpha amino acids. N-acyl-alpha amino acids are compounds containing an alpha amino acid which bears an acyl group at its terminal nitrogen atom. N-Acetylasparagine can also be classified as an alpha amino acid or a derivatized alpha amino acid. Technically, N-Acetylasparagine is a biologically available N-terminal capped form of the proteinogenic alpha amino acid L-asparagine. N-acetyl amino acids can be produced either via direct synthesis of specific N-acetyltransferases or via the proteolytic degradation of N-acetylated proteins by specific hydrolases. N-terminal acetylation of proteins is a widespread and highly conserved process in eukaryotes that is involved in protection and stability of proteins (PMID: 16465618 ). About 85% of all human proteins and 68% of all yeast proteins are acetylated at their N-terminus (PMID: 21750686 ). Several proteins from prokaryotes and archaea are also modified by N-terminal acetylation. The majority of eukaryotic N-terminal-acetylation reactions occur through N-acetyltransferase enzymes or NAT’s (PMID: 30054468 ). These enzymes consist of three main oligomeric complexes NatA, NatB, and NatC, which are composed of at least a unique catalytic subunit and one unique ribosomal anchor. The substrate specificities of different NAT enzymes are mainly determined by the identities of the first two N-terminal residues of the target protein. The human NatA complex co-translationally acetylates N-termini that bear a small amino acid (A, S, T, C, and occasionally V and G) (PMID: 30054468 ). NatA also exists in a monomeric state and can post-translationally acetylate acidic N-termini residues (D-, E-). NatB and NatC acetylate N-terminal methionine with further specificity determined by the identity of the second amino acid. N-acetylated amino acids, such as N-acetylasparagine can be released by an N-acylpeptide hydrolase from peptides generated by proteolytic degradation (PMID: 16465618 ). In addition to the NAT enzymes and protein-based acetylation, N-acetylation of free asparagine can also occur. In particular, N-Acetylasparagine can be biosynthesized from L-asparagine and acetyl-CoA by the enzyme NAT1 or the arylamine acetyltransferase I (https://doi.org/10.1096/fasebj.31.1_supplement.821.8). Many N-acetylamino acids are classified as uremic toxins if present in high abundance in the serum or plasma (PMID: 26317986 ; PMID: 20613759 ). Uremic toxins are a diverse group of endogenously produced molecules that, if not properly cleared or eliminated by the kidneys, can cause kidney damage, cardiovascular disease and neurological deficits (PMID: 18287557 ).
Structure
Synonyms
ValueSource
N-Acetyl-L-asparagineMeSH
N-Acetylasparagine, (14)C-labeledMeSH
N-Acetylasparagine, (D)-isomerMeSH
N-Acetylasparagine, (D,L)-isomerMeSH
AcAsnHMDB
N2-Acetyl-L-asparagineHMDB
(2S)-3-(C-Hydroxycarbonimidoyl)-2-[(1-hydroxyethylidene)amino]propanoateGenerator, HMDB
N-AcetylasparagineMeSH
Molecular FormulaC6H10N2O4
Average Mass174.1546
Monoisotopic Mass174.064056818
IUPAC Name(2S)-3-carbamoyl-2-acetamidopropanoic acid
Traditional NameL-asparagine, N -acetyl-
CAS Registry NumberNot Available
SMILES
CC(=O)N[C@@H](CC(N)=O)C(O)=O
InChI Identifier
InChI=1S/C6H10N2O4/c1-3(9)8-4(6(11)12)2-5(7)10/h4H,2H2,1H3,(H2,7,10)(H,8,9)(H,11,12)/t4-/m0/s1
InChI KeyHXFOXFJUNFFYMO-BYPYZUCNSA-N