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Record Information
Version2.0
Created at2005-11-16 15:48:42 UTC
Updated at2021-08-19 20:22:31 UTC
NP-MRD IDNP0000056
Secondary Accession NumbersNone
Natural Product Identification
Common NameL-Acetylcarnitine
DescriptionL-Acetylcarnitine (Acetylcarnitine or ALC or LAC) is an acetic acid ester of carnitine that facilitates the movement of acetyl-CoA into the matrices of mammalian mitochondria during the oxidation of fatty acids. Acetylcarnitine is an endogenous compound widely distributed in many tissues, including brain. Chemically, acetylcarnitine is the acetylated derivative of the amino acid L-carnitine whose function is generally correlated with regulation of energy metabolism within mitochondria. The synthesis of acetylcarnitine is catalyzed by the enzyme carnitine acetyltransferase (CAT), which is located on the inner mitochondrial membrane as well as in endoplasmic reticulum and peroxisome. CAT promotes the transfer of an acetyl group from acetyl-Coenzyme A (acetyl-CoA) to carnitine, thereby producing acetylcarnitine and free CoA (PMID: 29267192 ). After being synthetized, acetylcarnitine is transported outside mitochondria into the cytosol by the enzyme carnitine/acetylcarnitine translocase (CACT). This is a crucial metabolic reaction for beta-oxidation of fatty acids whereby acetylcarnitine facilitates the transport of acetyl-CoA across mitochondrial membranes (PMID: 29267192 ). In addition to his metabolic role, L-acetylcarnitine possesses unique neuroprotective, neuromodulatory, and neurotrophic properties. Acetylcarnitine is mobile throughout the plasma membranes and can rapidly cross blood-brain barrier. Indeed, acetylcarnitine can be transported by the high-affinity sodium-dependent organic cation/transporter (OCTN2), which is functionally expressed in cells forming the blood-brain barrier (PMID: 29267192 ). A wide range of mechanisms have been proposed to explain the multiplicity of acetylcarnitine activities within nervous tissues. In particular, it has been demonstrated that acetylcarnitine modulates the activity of nerve growth factor (NGF) and enhances the expression of NGF receptors in striatum/hippocampus during development (PMID: 29267192 ). Moreover, acetylcarnitine modulates different neurotransmitter systems, including the GABAergic, dopaminergic, and cholinergic system by increasing acetyl-CoA content and choline acetyltransferase (ChAT) activity. This may play an important role in counteracting various neurodegenerative disease processes (PMID: 15363640 ).
Structure
Thumb
Synonyms
ValueSource
(-)-AcetylcarnitineChEBI
(R)-AcetylcarnitineChEBI
Acetyl-L-(-)-carnitineChEBI
Acetyl-L-carnitineChEBI
L-Carnitine acetyl esterChEBI
L-O-AcetylcarnitineChEBI
O-Acetyl-(R)-carnitineChEBI
R-AcetylcarnitineChEBI
BranigenHMDB
Levocarnitine acetylHMDB
Acetyl carnitineHMDB
Carnitine, acetylHMDB
AlcarHMDB
Acetyl L carnitineHMDB
Acetylcarnitine, (R)-isomerHMDB
MedosanHMDB
ALCHMDB
3-(Acetyloxy)-4-(trimethylammonio)butanoateHMDB
Acetyl-DL-carnitineHMDB
AcetylcarnitineHMDB
DL-O-AcetylcarnitineHMDB
3-(Acetyloxy)-4-(trimethylammonio)butanoic acidHMDB
(+-)-AcetylcarnitineHMDB
Acetyl-carnitineHMDB
NicetileHMDB
O-Acetyl-L-carnitineHMDB
O-AcetylcarnitineHMDB
(3R)-3-Acetyloxy-4-(trimethylazaniumyl)butanoateHMDB
C2 CarnitineHMDB
L-AcetylcarnitineChEBI
Chemical FormulaC9H17NO4
Average Mass203.2380 Da
Monoisotopic Mass203.11576 Da
IUPAC Name(3R)-3-(acetyloxy)-4-(trimethylazaniumyl)butanoate
Traditional Nameacetyl-L-carnitine
CAS Registry Number3040-38-8
SMILES
CC(=O)O[C@H](CC([O-])=O)C[N+](C)(C)C
InChI Identifier
InChI=1S/C9H17NO4/c1-7(11)14-8(5-9(12)13)6-10(2,3)4/h8H,5-6H2,1-4H3/t8-/m1/s1
InChI KeyRDHQFKQIGNGIED-MRVPVSSYSA-N
Experimental Spectra
Spectrum TypeDescriptionDepositor EmailDepositor OrganizationDepositorDeposition DateView
1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, simulated)Varshavi.d262021-10-09View Spectrum
2D NMR[1H, 13C]-HSQC NMR Spectrum (2D, 600 MHz, H2O, experimental)Wishart LabWishart LabDavid Wishart2021-06-20View Spectrum
Predicted Spectra
Not Available
Chemical Shift Submissions
Spectrum TypeDescriptionDepositor EmailDepositor OrganizationDepositorDeposition DateView
1D NMR1H NMR Spectrum (1D, 600 MHz, H2O, simulated)varshavi.d26@gmail.comNot AvailableNot Available2021-07-25View Spectrum
Species
Species of Origin
Species NameSourceReference
Anas platyrhynchosFooDB
AnatidaeFooDB
Anser anserFooDB
Bison bisonFooDB
Bos taurusFooDB
Bos taurus X Bison bisonFooDB
Bubalus bubalisFooDB
Capra aegagrus hircusFooDB
CervidaeFooDB
Cervus canadensisFooDB
ColumbaFooDB
ColumbidaeFooDB
Dromaius novaehollandiaeFooDB
Equus caballusFooDB
Gallus gallusFooDB
Homo sapiensLOTUS Database
Lagopus mutaFooDB
LeporidaeFooDB
Lepus timidusFooDB
Melanitta fuscaFooDB
Meleagris gallopavoFooDB
Numida meleagrisFooDB
OdocoileusFooDB
OryctolagusFooDB
Ovis ariesFooDB
PhasianidaeFooDB
Phasianus colchicusFooDB
Struthio camelusFooDB
Sus scrofaFooDB
Sus scrofa domesticaFooDB
Species Where Detected
Species NameSourceReference
Homo sapiens (Urine)KNApSAcK Database
Chemical Taxonomy
Description Belongs to the class of organic compounds known as acyl carnitines. These are organic compounds containing a fatty acid with the carboxylic acid attached to carnitine through an ester bond.
KingdomOrganic compounds
Super ClassLipids and lipid-like molecules
ClassFatty Acyls
Sub ClassFatty acid esters
Direct ParentAcyl carnitines
Alternative Parents
Substituents
  • Acyl-carnitine
  • Dicarboxylic acid or derivatives
  • Tetraalkylammonium salt
  • Quaternary ammonium salt
  • Carboxylic acid ester
  • Carboxylic acid salt
  • Carboxylic acid derivative
  • Carboxylic acid
  • Organic nitrogen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Organic salt
  • Hydrocarbon derivative
  • Organic oxide
  • Organopnictogen compound
  • Organic oxygen compound
  • Carbonyl group
  • Amine
  • Aliphatic acyclic compound
Molecular FrameworkAliphatic acyclic compounds
External Descriptors
Physical Properties
StateSolid
Experimental Properties
PropertyValueReference
Melting Point145 °CNot Available
Boiling PointNot AvailableNot Available
Water Solubility1000000 mg/L @ 25 °C (est)The Good Scents Company Information System
LogP-4.031 (est)The Good Scents Company Information System
Predicted Properties
PropertyValueSource
Water Solubility0.36 g/LALOGPS
logP-2.4ALOGPS
logP-4.4ChemAxon
logS-2.9ALOGPS
pKa (Strongest Acidic)4.09ChemAxon
pKa (Strongest Basic)-7ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count3ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area66.43 ŲChemAxon
Rotatable Bond Count6ChemAxon
Refractivity72.64 m³·mol⁻¹ChemAxon
Polarizability20.82 ųChemAxon
Number of Rings0ChemAxon
BioavailabilityYesChemAxon
Rule of FiveYesChemAxon
Ghose FilterNoChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
HMDB IDHMDB0000201
DrugBank IDDB08842
Phenol Explorer Compound IDNot Available
FoodDB IDFDB093666
KNApSAcK IDC00052178
Chemspider ID5406074
KEGG Compound IDC02571
BioCyc IDO-ACETYLCARNITINE
BiGG IDNot Available
Wikipedia LinkAcetyl-L-carnitine
METLIN IDNot Available
PubChem Compound7045767
PDB IDNot Available
ChEBI ID57589
Good Scents IDrw1654391
References
General References
  1. Sakuma T: Alteration of urinary carnitine profile induced by benzoate administration. Arch Dis Child. 1991 Jul;66(7):873-5. [PubMed:1863104 ]
  2. Grizard G, Lombard-Vignon N, Boucher D: Changes in carnitine and acetylcarnitine in human semen during cryopreservation. Hum Reprod. 1992 Oct;7(9):1245-8. [PubMed:1479006 ]
  3. Kamimori H, Hamashima Y, Konishi M: Determination of carnitine and saturated-acyl group carnitines in human urine by high-performance liquid chromatography with fluorescence detection. Anal Biochem. 1994 May 1;218(2):417-24. [PubMed:8074302 ]
  4. Cooper MB, Forte CA, Jones DA: Citrate interference with the determination of acetylcarnitine: a method for its elimination. Clin Chim Acta. 1986 Sep 30;159(3):291-9. [PubMed:3769216 ]
  5. Spagnoli A, Lucca U, Menasce G, Bandera L, Cizza G, Forloni G, Tettamanti M, Frattura L, Tiraboschi P, Comelli M, et al.: Long-term acetyl-L-carnitine treatment in Alzheimer's disease. Neurology. 1991 Nov;41(11):1726-32. [PubMed:1944900 ]
  6. Brooks DE: Carnitine, acetylcarnitine and the activity of carnitine acyltransferases in seminal plasma and spermatozoa of men, rams and rats. J Reprod Fertil. 1979 Jul;56(2):667-73. [PubMed:480318 ]
  7. Inoue F, Terada N, Nakajima H, Okochi M, Kodo N, Kizaki Z, Kinugasa A, Sawada T: Effect of sports activity on carnitine metabolism. Measurement of free carnitine, gamma-butyrobetaine and acylcarnitines by tandem mass spectrometry. J Chromatogr B Biomed Sci Appl. 1999 Aug 6;731(1):83-8. [PubMed:10491992 ]
  8. Niu YJ, Jiang ZM, Shu H, Li CF, Liu W, Yao GX, Jiang J, Li JQ, Longo A: [Assay of carnitine in plasma and urine of healthy adults]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao. 2002 Apr;24(2):185-7. [PubMed:12905800 ]
  9. Siliprandi N, Di Lisa F, Pieralisi G, Ripari P, Maccari F, Menabo R, Giamberardino MA, Vecchiet L: Metabolic changes induced by maximal exercise in human subjects following L-carnitine administration. Biochim Biophys Acta. 1990 Apr 23;1034(1):17-21. [PubMed:2328258 ]
  10. Marzo A, Cardace G, Corbelleta C, Bassani E, Morabito E, Arrigoni Martelli E: Homeostatic equilibrium of L-carnitine family before and after i.v. administration of propionyl-L-carnitine in humans, dogs and rats. Eur J Drug Metab Pharmacokinet. 1991;Spec No 3:357-63. [PubMed:1820908 ]
  11. Novak M, Wieser PB, Buch M, Hahn P: Acetylcarnitine and free carnitine in body fluids before and after birth. Pediatr Res. 1979 Jan;13(1):10-5. [PubMed:571081 ]
  12. Battistin L, Pizzolato G, Dam M, Da Col C, Perlotto N, Saitta B, Borsato N, Calvani M, Ferlin G: Single-photon emission computed tomography studies with 99mTc-hexamethylpropyleneamine oxime in dementia: effects of acute administration of L-acetylcarnitine. Eur Neurol. 1989;29(5):261-5. [PubMed:2792144 ]
  13. Deufel T: Determination of L-carnitine in biological fluids and tissues. J Clin Chem Clin Biochem. 1990 May;28(5):307-11. [PubMed:2380667 ]
  14. Minkler PE, Hoppel CL: Quantification of free carnitine, individual short- and medium-chain acylcarnitines, and total carnitine in plasma by high-performance liquid chromatography. Anal Biochem. 1993 Aug 1;212(2):510-8. [PubMed:8214594 ]
  15. Bruno G, Scaccianoce S, Bonamini M, Patacchioli FR, Cesarino F, Grassini P, Sorrentino E, Angelucci L, Lenzi GL: Acetyl-L-carnitine in Alzheimer disease: a short-term study on CSF neurotransmitters and neuropeptides. Alzheimer Dis Assoc Disord. 1995 Fall;9(3):128-31. [PubMed:8534410 ]
  16. Pace S, Longo A, Toon S, Rolan P, Evans AM: Pharmacokinetics of propionyl-L-carnitine in humans: evidence for saturable tubular reabsorption. Br J Clin Pharmacol. 2000 Nov;50(5):441-8. [PubMed:11069438 ]
  17. De Rosa M, Boggia B, Amalfi B, Zarrilli S, Vita A, Colao A, Lombardi G: Correlation between seminal carnitine and functional spermatozoal characteristics in men with semen dysfunction of various origins. Drugs R D. 2005;6(1):1-9. [PubMed:15801863 ]
  18. Zanelli SA, Solenski NJ, Rosenthal RE, Fiskum G: Mechanisms of ischemic neuroprotection by acetyl-L-carnitine. Ann N Y Acad Sci. 2005 Aug;1053:153-61. [PubMed:16179519 ]
  19. Kuratsune H, Yamaguti K, Lindh G, Evengard B, Hagberg G, Matsumura K, Iwase M, Onoe H, Takahashi M, Machii T, Kanakura Y, Kitani T, Langstrom B, Watanabe Y: Brain regions involved in fatigue sensation: reduced acetylcarnitine uptake into the brain. Neuroimage. 2002 Nov;17(3):1256-65. [PubMed:12414265 ]
  20. Gray SC, Devito G, Nimmo MA: Effect of active warm-up on metabolism prior to and during intense dynamic exercise. Med Sci Sports Exerc. 2002 Dec;34(12):2091-6. [PubMed:12471321 ]
  21. Chiechio S, Canonico PL, Grilli M: l-Acetylcarnitine: A Mechanistically Distinctive and Potentially Rapid-Acting Antidepressant Drug. Int J Mol Sci. 2017 Dec 21;19(1). pii: ijms19010011. doi: 10.3390/ijms19010011. [PubMed:29267192 ]
  22. Virmani A, Binienda Z: Role of carnitine esters in brain neuropathology. Mol Aspects Med. 2004 Oct-Dec;25(5-6):533-49. doi: 10.1016/j.mam.2004.06.003. [PubMed:15363640 ]