| Record Information |
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| Version | 5.0 |
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| Status | Detected and Quantified |
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| Creation Date | 2005-11-16 15:48:42 UTC |
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| Update Date | 2023-05-30 20:55:59 UTC |
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| HMDB ID | HMDB0000766 |
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| Secondary Accession Numbers | |
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| Metabolite Identification |
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| Common Name | N-Acetyl-L-alanine |
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| Description | N-Acetyl-L-alanine or N-Acetylalanine, 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-Acetyl-L-alanine can also be classified as an alpha amino acid or a derivatized alpha amino acid. Technically, N-alpha-Acetyl-L-alanine is a biologically available N-terminal capped form of the proteinogenic alpha amino acid L-alanine. 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-Acetyl-L-alanine is a product of the enzyme known as ribosomal alanine N-acetyltransferase (EC 2.3.1.128) which catalyzes the transfer of the acetyl group of acetyl CoA to proteins bearing an N-terminal alanine. N-acetylated amino acids, such as N-acetylalanine can be released by an N-acylpeptide hydrolase from peptides generated by proteolytic degradation (PMID: 16465618 ). Excessive amounts N-acetyl amino acids can be detected in the urine with individuals with aminoacylase I deficiency, a genetic disorder (PMID: 16465618 ). These include N-acetylalanine (as well as N-acetylserine, N-acetylglutamine, N-acetylglutamate, N-acetylglycine, N-acetylmethionine and smaller amounts of N-acetylthreonine, N-acetylleucine, N-acetylvaline and N-acetylisoleucine. Aminoacylase I is a soluble homodimeric zinc binding enzyme that catalyzes the formation of free aliphatic amino acids from N-acetylated precursors. In humans, Aminoacylase I is encoded by the aminoacylase 1 gene (ACY1) on chromosome 3p21 that consists of 15 exons (OMIM 609924 ). Individuals with aminoacylase I deficiency will experience convulsions, hearing loss and difficulty feeding (PMID: 16465618 ). ACY1 can also catalyze the reverse reaction, the synthesis of acetylated amino acids. Many N-acetylamino acids, including N-acetylalanine, are classified as uremic toxins (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 ). N-Acetyl-L-alanine has been identified in the human placenta (PMID: 32033212 ). |
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| Structure | InChI=1S/C5H9NO3/c1-3(5(8)9)6-4(2)7/h3H,1-2H3,(H,6,7)(H,8,9)/t3-/m0/s1 |
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| Synonyms | | Value | Source |
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| (S)-2-(Acetylamino)propanoic acid | ChEBI | | 2-Acetamidopropionic acid | ChEBI | | Ac-ala-OH | ChEBI | | Acetylalanine | ChEBI | | L-N-Acetylalanine | ChEBI | | N-Acetyl-L-alpha-alanine | ChEBI | | N-Acetyl-S-alanine | ChEBI | | N-Acetylalanine | ChEBI | | (S)-2-(Acetylamino)propanoate | Generator | | 2-Acetamidopropionate | Generator | | N-Acetyl-L-a-alanine | Generator | | N-Acetyl-L-α-alanine | Generator | | (S)-(-)-N-Acetylalanine | HMDB | | (S)-N-Acetylalanine | HMDB | | Acetyl-L-alanine | HMDB | | N-Acetyl-(S)-alanine | HMDB |
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| Chemical Formula | C5H9NO3 |
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| Average Molecular Weight | 131.1299 |
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| Monoisotopic Molecular Weight | 131.058243159 |
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| IUPAC Name | (2S)-2-acetamidopropanoic acid |
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| Traditional Name | N-acetylalanine |
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| CAS Registry Number | 97-69-8 |
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| SMILES | C[C@H](NC(C)=O)C(O)=O |
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| InChI Identifier | InChI=1S/C5H9NO3/c1-3(5(8)9)6-4(2)7/h3H,1-2H3,(H,6,7)(H,8,9)/t3-/m0/s1 |
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| InChI Key | KTHDTJVBEPMMGL-VKHMYHEASA-N |
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| Chemical Taxonomy |
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| 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. |
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| Kingdom | Organic compounds |
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| Super Class | Organic acids and derivatives |
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| Class | Carboxylic acids and derivatives |
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| Sub Class | Amino acids, peptides, and analogues |
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| Direct Parent | N-acyl-L-alpha-amino acids |
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| Alternative Parents | |
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| Substituents | - N-acyl-l-alpha-amino acid
- Alanine or derivatives
- Acetamide
- Carboxamide group
- Secondary carboxylic acid amide
- Carboxylic acid
- Monocarboxylic acid or derivatives
- Organopnictogen compound
- Organic oxygen compound
- Organooxygen compound
- Organonitrogen compound
- Carbonyl group
- Organic nitrogen compound
- Organic oxide
- Hydrocarbon derivative
- Aliphatic acyclic compound
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| Molecular Framework | Aliphatic acyclic compounds |
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| External Descriptors | |
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| Ontology |
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| Physiological effect | |
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| Disposition | |
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| Process | |
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| Physical Properties |
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| State | Solid |
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| Experimental Molecular Properties | | Property | Value | Reference |
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| Melting Point | Not Available | Not Available | | Boiling Point | Not Available | Not Available | | Water Solubility | Not Available | Not Available | | LogP | Not Available | Not Available |
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| Experimental Chromatographic Properties | Not Available |
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| Predicted Molecular Properties | |
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| Predicted Chromatographic Properties | Predicted Collision Cross SectionsPredicted Retention Times Underivatized| Chromatographic Method | Retention Time | Reference |
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| Measured using a Waters Acquity ultraperformance liquid chromatography (UPLC) ethylene-bridged hybrid (BEH) C18 column (100 mm × 2.1 mm; 1.7 μmparticle diameter). Predicted by Afia on May 17, 2022. Predicted by Afia on May 17, 2022. | 1.84 minutes | 32390414 | | Predicted by Siyang on May 30, 2022 | 9.8042 minutes | 33406817 | | Predicted by Siyang using ReTip algorithm on June 8, 2022 | 5.14 minutes | 32390414 | | AjsUoB = Accucore 150 Amide HILIC with 10mM Ammonium Formate, 0.1% Formic Acid | 180.6 seconds | 40023050 | | Fem_Long = Waters ACQUITY UPLC HSS T3 C18 with Water:MeOH and 0.1% Formic Acid | 995.1 seconds | 40023050 | | Fem_Lipids = Ascentis Express C18 with (60:40 water:ACN):(90:10 IPA:ACN) and 10mM NH4COOH + 0.1% Formic Acid | 336.1 seconds | 40023050 | | Life_Old = Waters ACQUITY UPLC BEH C18 with Water:(20:80 acetone:ACN) and 0.1% Formic Acid | 63.7 seconds | 40023050 | | Life_New = RP Waters ACQUITY UPLC HSS T3 C18 with Water:(30:70 MeOH:ACN) and 0.1% Formic Acid | 193.5 seconds | 40023050 | | RIKEN = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 58.3 seconds | 40023050 | | Eawag_XBridgeC18 = XBridge C18 3.5u 2.1x50 mm with Water:MeOH and 0.1% Formic Acid | 252.7 seconds | 40023050 | | BfG_NTS_RP1 =Agilent Zorbax Eclipse Plus C18 (2.1 mm x 150 mm, 3.5 um) with Water:ACN and 0.1% Formic Acid | 299.0 seconds | 40023050 | | HILIC_BDD_2 = Merck SeQuant ZIC-HILIC with ACN(0.1% formic acid):water(16 mM ammonium formate) | 265.7 seconds | 40023050 | | UniToyama_Atlantis = RP Waters Atlantis T3 (2.1 x 150 mm, 5 um) with ACN:Water and 0.1% Formic Acid | 629.0 seconds | 40023050 | | BDD_C18 = Hypersil Gold 1.9µm C18 with Water:ACN and 0.1% Formic Acid | 137.7 seconds | 40023050 | | UFZ_Phenomenex = Kinetex Core-Shell C18 2.6 um, 3.0 x 100 mm, Phenomenex with Water:MeOH and 0.1% Formic Acid | 824.9 seconds | 40023050 | | SNU_RIKEN_POS = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 201.0 seconds | 40023050 | | RPMMFDA = Waters ACQUITY UPLC BEH C18 with Water:ACN and 0.1% Formic Acid | 200.5 seconds | 40023050 | | MTBLS87 = Merck SeQuant ZIC-pHILIC column with ACN:Water and :ammonium carbonate | 646.2 seconds | 40023050 | | KI_GIAR_zic_HILIC_pH2_7 = Merck SeQuant ZIC-HILIC with ACN:Water and 0.1% FA | 277.9 seconds | 40023050 | | Meister zic-pHILIC pH9.3 = Merck SeQuant ZIC-pHILIC column with ACN:Water 5mM NH4Ac pH9.3 and 5mM ammonium acetate in water | 270.4 seconds | 40023050 |
Predicted Kovats Retention IndicesUnderivatizedDerivatized| Derivative Name / Structure | SMILES | Kovats RI Value | Column Type | Reference |
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| N-Acetyl-L-alanine,1TMS,isomer #1 | CC(=O)N[C@@H](C)C(=O)O[Si](C)(C)C | 1245.3 | Semi standard non polar | 33892256 | | N-Acetyl-L-alanine,1TMS,isomer #2 | CC(=O)N([C@@H](C)C(=O)O)[Si](C)(C)C | 1289.7 | Semi standard non polar | 33892256 | | N-Acetyl-L-alanine,2TMS,isomer #1 | CC(=O)N([C@@H](C)C(=O)O[Si](C)(C)C)[Si](C)(C)C | 1307.4 | Semi standard non polar | 33892256 | | N-Acetyl-L-alanine,2TMS,isomer #1 | CC(=O)N([C@@H](C)C(=O)O[Si](C)(C)C)[Si](C)(C)C | 1298.8 | Standard non polar | 33892256 | | N-Acetyl-L-alanine,2TMS,isomer #1 | CC(=O)N([C@@H](C)C(=O)O[Si](C)(C)C)[Si](C)(C)C | 1447.1 | Standard polar | 33892256 | | N-Acetyl-L-alanine,1TBDMS,isomer #1 | CC(=O)N[C@@H](C)C(=O)O[Si](C)(C)C(C)(C)C | 1478.1 | Semi standard non polar | 33892256 | | N-Acetyl-L-alanine,1TBDMS,isomer #2 | CC(=O)N([C@@H](C)C(=O)O)[Si](C)(C)C(C)(C)C | 1536.9 | Semi standard non polar | 33892256 | | N-Acetyl-L-alanine,2TBDMS,isomer #1 | CC(=O)N([C@@H](C)C(=O)O[Si](C)(C)C(C)(C)C)[Si](C)(C)C(C)(C)C | 1768.2 | Semi standard non polar | 33892256 | | N-Acetyl-L-alanine,2TBDMS,isomer #1 | CC(=O)N([C@@H](C)C(=O)O[Si](C)(C)C(C)(C)C)[Si](C)(C)C(C)(C)C | 1760.6 | Standard non polar | 33892256 | | N-Acetyl-L-alanine,2TBDMS,isomer #1 | CC(=O)N([C@@H](C)C(=O)O[Si](C)(C)C(C)(C)C)[Si](C)(C)C(C)(C)C | 1750.0 | Standard polar | 33892256 |
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| Spectra |
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| Biological Properties |
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| Cellular Locations | - Cytoplasm (predicted from logP)
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| Biospecimen Locations | |
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| Tissue Locations | |
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| Pathways | |
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| Normal Concentrations |
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| Feces | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Both | Normal | | details | | Feces | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Both | Normal | | details | | Feces | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Both | Normal | | details | | Urine | Detected and Quantified | 4.00 (1.75-8.27) umol/mmol creatinine | Newborn (0-30 days old) | Both | Normal | | details |
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| Abnormal Concentrations |
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| Blood | Expected but not Quantified | Not Quantified | Not Specified | Not Specified | Cancer patients undergoing total body irradiation | | details | | Feces | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Both | Colorectal Cancer | | details | | Feces | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Both | Colorectal cancer | | details | | Feces | Detected but not Quantified | Not Quantified | Adult (>18 years old) | Both | Colorectal cancer | | details | | Urine | Detected and Quantified | 0.5 (0.0-1.0) umol/mmol creatinine | Adult (>18 years old) | Both | Prostate Cancer | | details |
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| Associated Disorders and Diseases |
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| Disease References | | Colorectal cancer |
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- Brown DG, Rao S, Weir TL, O'Malia J, Bazan M, Brown RJ, Ryan EP: Metabolomics and metabolic pathway networks from human colorectal cancers, adjacent mucosa, and stool. Cancer Metab. 2016 Jun 6;4:11. doi: 10.1186/s40170-016-0151-y. eCollection 2016. [PubMed:27275383 ]
- Sinha R, Ahn J, Sampson JN, Shi J, Yu G, Xiong X, Hayes RB, Goedert JJ: Fecal Microbiota, Fecal Metabolome, and Colorectal Cancer Interrelations. PLoS One. 2016 Mar 25;11(3):e0152126. doi: 10.1371/journal.pone.0152126. eCollection 2016. [PubMed:27015276 ]
- Goedert JJ, Sampson JN, Moore SC, Xiao Q, Xiong X, Hayes RB, Ahn J, Shi J, Sinha R: Fecal metabolomics: assay performance and association with colorectal cancer. Carcinogenesis. 2014 Sep;35(9):2089-96. doi: 10.1093/carcin/bgu131. Epub 2014 Jul 18. [PubMed:25037050 ]
| | Prostate cancer |
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- Sreekumar A, Poisson LM, Rajendiran TM, Khan AP, Cao Q, Yu J, Laxman B, Mehra R, Lonigro RJ, Li Y, Nyati MK, Ahsan A, Kalyana-Sundaram S, Han B, Cao X, Byun J, Omenn GS, Ghosh D, Pennathur S, Alexander DC, Berger A, Shuster JR, Wei JT, Varambally S, Beecher C, Chinnaiyan AM: Metabolomic profiles delineate potential role for sarcosine in prostate cancer progression. Nature. 2009 Feb 12;457(7231):910-4. doi: 10.1038/nature07762. [PubMed:19212411 ]
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| Associated OMIM IDs | |
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| External Links |
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| DrugBank ID | DB02518 |
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| Phenol Explorer Compound ID | Not Available |
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| FooDB ID | FDB022231 |
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| KNApSAcK ID | Not Available |
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| Chemspider ID | 79449 |
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| KEGG Compound ID | Not Available |
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| BioCyc ID | Not Available |
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| BiGG ID | Not Available |
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| Wikipedia Link | Not Available |
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| METLIN ID | 5733 |
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| PubChem Compound | 88064 |
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| PDB ID | Not Available |
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| ChEBI ID | 40992 |
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| Food Biomarker Ontology | Not Available |
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| VMH ID | Not Available |
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| MarkerDB ID | Not Available |
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| Good Scents ID | Not Available |
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| References |
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| Synthesis Reference | Vanzura, Jiri; Kasafirek, Evzen; Hrabalek, Alexandr; Vinsova, Jarmila; Krepelka, Jiri. Process for preparing highly pure N-acetyl-L- or -D-alanine. Czech. (1989), 4 pp. |
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| Material Safety Data Sheet (MSDS) | Not Available |
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| General References | - Sass JO, Mohr V, Olbrich H, Engelke U, Horvath J, Fliegauf M, Loges NT, Schweitzer-Krantz S, Moebus R, Weiler P, Kispert A, Superti-Furga A, Wevers RA, Omran H: Mutations in ACY1, the gene encoding aminoacylase 1, cause a novel inborn error of metabolism. Am J Hum Genet. 2006 Mar;78(3):401-9. Epub 2006 Jan 18. [PubMed:16465618 ]
- Elshenawy S, Pinney SE, Stuart T, Doulias PT, Zura G, Parry S, Elovitz MA, Bennett MJ, Bansal A, Strauss JF 3rd, Ischiropoulos H, Simmons RA: The Metabolomic Signature of the Placenta in Spontaneous Preterm Birth. Int J Mol Sci. 2020 Feb 4;21(3). pii: ijms21031043. doi: 10.3390/ijms21031043. [PubMed:32033212 ]
- Tanaka H, Sirich TL, Plummer NS, Weaver DS, Meyer TW: An Enlarged Profile of Uremic Solutes. PLoS One. 2015 Aug 28;10(8):e0135657. doi: 10.1371/journal.pone.0135657. eCollection 2015. [PubMed:26317986 ]
- Van Damme P, Hole K, Pimenta-Marques A, Helsens K, Vandekerckhove J, Martinho RG, Gevaert K, Arnesen T: NatF contributes to an evolutionary shift in protein N-terminal acetylation and is important for normal chromosome segregation. PLoS Genet. 2011 Jul;7(7):e1002169. doi: 10.1371/journal.pgen.1002169. Epub 2011 Jul 7. [PubMed:21750686 ]
- Ree R, Varland S, Arnesen T: Spotlight on protein N-terminal acetylation. Exp Mol Med. 2018 Jul 27;50(7):1-13. doi: 10.1038/s12276-018-0116-z. [PubMed:30054468 ]
- Toyohara T, Akiyama Y, Suzuki T, Takeuchi Y, Mishima E, Tanemoto M, Momose A, Toki N, Sato H, Nakayama M, Hozawa A, Tsuji I, Ito S, Soga T, Abe T: Metabolomic profiling of uremic solutes in CKD patients. Hypertens Res. 2010 Sep;33(9):944-52. doi: 10.1038/hr.2010.113. Epub 2010 Jul 8. [PubMed:20613759 ]
- Vanholder R, Baurmeister U, Brunet P, Cohen G, Glorieux G, Jankowski J: A bench to bedside view of uremic toxins. J Am Soc Nephrol. 2008 May;19(5):863-70. doi: 10.1681/ASN.2007121377. Epub 2008 Feb 20. [PubMed:18287557 ]
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