Aspartic acid

Aspartic acid
Names


IUPAC names Trivial: Aspartic acid Systematic: 2-Aminobutanedioic acid
Other names Aminosuccinic acid, asparagic acid, asparaginic acid^[1]
Identifiers
CAS Number	617-45-8^Y 56-84-8 (L-isomer)^N 1783-96-6 (D-isomer)^N
ChEBI	CHEBI:22660^Y
ChEMBL	ChEMBL139661^Y
ChemSpider	411^Y
EC Number	200-291-6
Jmol interactive 3D	Image Image
KEGG	C16433^Y
PubChem	424
UNII	28XF4669EP^Y
InChI InChI=1S/C4H7NO4/c5-2(4(8)9)1-3(6)7/h2H,1,5H2,(H,6,7)(H,8,9)^Y Key: CKLJMWTZIZZHCS-UHFFFAOYSA-N^Y InChI=1/C4H7NO4/c5-2(4(8)9)1-3(6)7/h2H,1,5H2,(H,6,7)(H,8,9) Key: CKLJMWTZIZZHCS-UHFFFAOYAE
SMILES O=C(O)CC(N)C(=O)O C(C(C(=O)O)N)C(=O)O
Properties
Chemical formula	C₄H₇NO₄
Molar mass	133.10 g·mol⁻¹
Appearance	colourless crystals
Density	1.7 g/cm³
Melting point	270 °C (518 °F; 543 K)
Boiling point	324 °C (615 °F; 597 K) (decomposes)
Solubility in water	4.5 g/L^[2]
Acidity (pK_a)	3.9
Hazards
Safety data sheet	See: data page
NFPA 704	1 1 0
Supplementary data page
Structure and properties	Refractive index (n), Dielectric constant (ε_r), etc.
Thermodynamic data	Phase behaviour solid–liquid–gas
Spectral data	UV, IR, NMR, MS
N verify (what is ^YN ?)
Infobox references

Aspartic acid (abbreviated as Asp or D; encoded by the codons [GAU and GAC]) is an ɑ-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated -+NH3 form under biological conditions), an α-carboxylic acid group (which is in the deprotonated –COO- form under biological conditions), and a side chain CH₂COOH, classifying it as a charged(at physiological pH), aliphatic amino acid. It is semi-essential in humans, meaning the body can synthesize it from oxaloacetate.

Asp's L-isomer is one of the 23 proteinogenic amino acids, i.e., the building blocks of proteins. Asp (and glutamic acid) is classified as acidic, with a pK_a of 3.9, however in a peptide this is highly dependent on the local environment (as with all amino acids), and could be as high as 14. Asp is pervasive in biosynthesis.

L-aspartic acid is one of the two main ingredients of the artificial sweetener aspartame, along with L-phenylalanine.

Discovery

Aspartic acid was first discovered in 1827 by Auguste-Arthur Plisson and Étienne Ossian Henry,^[3] derived from asparagine, which had been isolated from asparagus juice in 1806, by boiling with a base.^[4]

Forms and nomenclature

There are two forms or enantiomers of aspartic acid. The name "aspartic acid" can refer to either enantiomer or a mixture of two.^[5] Of these two forms, only one, "L-aspartic acid", is directly incorporated into proteins. The biological roles of its counterpart, "D-aspartic acid" are more limited. Where enzymatic synthesis will produce one or the other, most chemical syntheses will produce both forms, "DL-aspartic acid," known as a racemic mixture.

Metabolism

Aspartate is non-essential in mammals, being produced from oxaloacetate by transamination. It can also be generated from ornithine and citrulline in the urea cycle. In plants and microorganisms, aspartate is the precursor to several amino acids, including four that are essential for humans: methionine, threonine, isoleucine, and lysine. The conversion of aspartate to these other amino acids begins with reduction of aspartate to its "semialdehyde," O₂CCH(NH₂)CH₂CHO.^[6] Asparagine is derived from aspartate via transamidation:

-O₂CCH(NH₂)CH₂CO₂- + GC(O)NH₃+ O₂CCH(NH₂)CH₂CONH₃+ + GC(O)O

(where GC(O)NH₂ and GC(O)OH are glutamine and glutamic acid, respectively)

Other biochemical roles

Aspartate is also a metabolite in the urea cycle and participates in gluconeogenesis. It carries reducing equivalents in the malate-aspartate shuttle, which utilizes the ready interconversion of aspartate and oxaloacetate, which is the oxidized (dehydrogenated) derivative of malic acid. Aspartate donates one nitrogen atom in the biosynthesis of inosine, the precursor to the purine bases. In addition, aspartic acid acts as hydrogen acceptor in a chain of ATP synthase.

Interactive pathway map

Click on genes, proteins and metabolites below to link to respective articles. ^{[§ 1]}

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|{{{bSize}}}px|alt=Glycolysis and Gluconeogenesis edit]]

Glycolysis and Gluconeogenesis edit

↑ The interactive pathway map can be edited at WikiPathways: "GlycolysisGluconeogenesis_WP534".

Neurotransmitter

Aspartate (the conjugate base of aspartic acid) stimulates NMDA receptors, though not as strongly as the amino acid neurotransmitter L-glutamate does.^[7]

Sources

Dietary sources

Aspartic acid is not an essential amino acid, which means that it can be synthesized from central metabolic pathway intermediates in humans. Aspartic acid is found in:

Animal sources: oysters, luncheon meats, sausage meat, wild game
Vegetable sources: sprouting seeds, oat flakes, avocado,^[8] asparagus,^[9] young sugarcane, and molasses from sugar beets.^[1]
Dietary supplements, either as aspartic acid itself or salts (such as magnesium aspartate)
The sweetener aspartame (brands: NutraSweet, Equal, Canderel, etc.)

Chemical synthesis

Racemic aspartic acid can be synthesized from diethyl sodium phthalimidomalonate, (C₆H₄(CO)₂NC(CO₂Et)₂).^[10]

The major disadvantage of the above technique is that equimolar amounts of each enantiomer are made. Using biotechnology it is now possible to use immobilised enzymes to create just one type of enantiomer owing to their stereospecificity.

References

1 2 "862. Aspartic acid". The Merck Index (11th ed.). 1989. p. 132. ISBN 0-911910-28-X.
↑ "ICSC 1439 - L-ASPARTIC ACID". inchem.org.
↑ Berzelius, Jöns Jakob; Öngren, Olof Gustaf (1839). Traité de chimie (in French) 3. Brussels: A. Wahlen et Cie. p. 81. Retrieved 25 August 2015.
↑ R.H.A. Plimmer (1912) [1908]. R.H.A. Plimmer & F.G. Hopkins, ed. The chemical composition of the proteins. Monographs on biochemistry. Part I. Analysis (2nd ed.). London: Longmans, Green and Co. p. 112. Retrieved January 18, 2010.
↑ "Nomenclature and symbolism for amino acids and peptides (IUPAC-IUB Recommendations 1983)", Pure Appl. Chem. 56 (5), 1984: 595–624, doi:10.1351/pac198456050595 .
↑ Lehninger, Albert L.; Nelson, David L.; Cox, Michael M. (2000), Principles of Biochemistry (3rd ed.), New York: W. H. Freeman, ISBN 1-57259-153-6 .
↑ Chen, Philip E.; Geballe, Matthew T.; Stansfeld, Phillip J.; Johnston, Alexander R.; Yuan, Hongjie; Jacob, Amanda L.; Snyder, James P.; Traynelis, Stephen F.; Wyllie, David J. A. (2005). "Structural Features of the Glutamate Binding Site in Recombinant NR1/NR2A N-Methyl-D-aspartate Receptors Determined by Site-Directed Mutagenesis and Molecular Modeling". Mol. Pharmacol. 67 (5): 1470–84. doi:10.1124/mol.104.008185. PMID 15703381.
↑ D. K. Salunkhe; S.S. Kadam (18 August 1995). Handbook of Fruit Science and Technology: Production, Composition, Storage, and Processing. CRC Press. pp. 368–. ISBN 978-0-8247-9643-3.
↑ Douglas M. Considine (6 December 2012). Foods and Food Production Encyclopedia. Springer Science & Business Media. pp. 114–. ISBN 978-1-4684-8511-0.
↑ Dunn, M. S.; Smart, B. W. (1950). "DL-Aspartic Acid". Org. Synth. 30: 7. ; Coll. Vol. 4, p. 55 .

External links

GMD MS Spectrum
American Chemical Society (21 April 2010). "Ancestral Eve' Crystal May Explain Origin of Life's Left-Handedness". ScienceDaily. Archived from the original on 23 April 2010. Retrieved 2010-04-21.

Other hematological agents

Antianemic
preparations
(B03)

Erythropoietins	Darbepoetin alfa Methoxy polyethylene glycol-epoetin beta Peginesatide

Iron supplements	Ferrous ascorbate Ferrous aspartate Ferrous carbonate Ferrous chloride Ferrous fumarate Ferrous gluconate Ferrous glycine sulfate Ferrous iodine Ferrous succinate Ferrous sulfate Ferrous tartrate Iron sucrose Sodium ferric gluconate complex

Blood substitutes and
perfusion solutions (B05)

Dextran
Gelatin agents
Hemoglobin crosfumaril
Hemoglobin raffimer
Hydroxyethyl starch
Icodextrin
Mannitol
Serum albumin
Sorbitol

Enzymes (B06AA)

Drugs used i hereditary
angioedema (B06AC)

The encoded amino acid

General topics

By properties

Aliphatic	Branched-chain amino acids (Valine Isoleucine Leucine) Methionine Alanine Proline Glycine

Aromatic	Phenylalanine Tyrosine Tryptophan Histidine

Polar, uncharged	Asparagine Glutamine Serine Threonine

Positive charge (pK_a)	Lysine (≈10.8) Arginine (≈12.5) Histidine (≈6.1)

Negative charge (pK_a)	Aspartic acid (≈3.9) Glutamic acid (≈4.1) Cysteine (≈8.3) Tyrosine (≈10.1)

Other classifications

Neurotransmitters

Amino acid-derived	Major excitatory/inhibitory systems: Glutamate system: Agmatine Aspartic acid (aspartate) Cycloserine Glutamic acid (glutamate) Glutathione Glycine GSNO GSSG Kynurenic acid NAA NAAG Proline Serine; GABA system: GABA GABOB GHB; Glycine system: α-Alanine β-Alanine Glycine Hypotaurine Proline Sarcosine Serine Taurine; GHB system: GHB T-HCA (GHC) Biogenic amines: Monoamines: 6-OHM Dopamine Epinephrine (adrenaline) Melatonin NAS (normelatonin) Norepinephrine (noradrenaline) Serotonin (5-HT); Trace amines: 3-Iodothyronamine N-Methylphenethylamine N-Methyltryptamine m-Octopamine p-Octopamine Phenylethanolamine Phenethylamine Synephrine Tryptamine m-Tyramine p-Tyramine; Others: Histamine Neuropeptides: See here instead.

Lipid-derived	Endocannabinoids: 2-AG 2-AGE (noladin ether) 2-ALPI 2-OG AA-5-HT Anandamide (AEA) DEA LPI NADA NAGly OEA Oleamide PEA RVD-Hpα SEA Virodhamine (O-AEA) Neurosteroids: See here instead.

Nucleobase-derived	Nucleosides: Adenosine system: Adenosine ADP AMP ATP

Vitamin-derived	Cholinergic system: Acetylcholine

Miscellaneous	Gasotransmitters: Carbon monoxide (CO) Hydrogen sulfide (H₂S) Nitrous oxide (NO); Candidates: Acetaldehyde Ammonia (NH₃) Carbonyl sulfide (COS) Nitrous oxide (N₂O) Sulfur dioxide (SO₂)

Glutamatergics

Receptor
(ligands)

AMPA	Agonists: Glutamate/active site agonists: 5-Fluorowillardiine Acromelic acid (acromelate) AMPA BOAA Domoic acid Glutamate Ibotenic acid Proline Quisqualic acid Willardiine; Positive allosteric modulators: Aniracetam Cyclothiazide CX-516 CX-546 CX-614 Farampator (CX-691, Org 24448) CX-717 CX-1739 CX-1942 Diazoxide Hydrochlorothiazide (HCTZ) IDRA-21 LY-392,098 LY-404,187 LY-451,646 LY-503,430 Mibampator (LY-451,395) Org 26576 Oxiracetam PEPA PF-04958242 Piracetam Pramiracetam S-18986 Sunifiram Unifiram Antagonists: ACEA-1011 ATPO Becampanel Caroverine CNQX Dasolampanel DNQX Fanapanel (MPQX) GAMS GYKI-52466 Kynurenic acid Kynurenine Licostinel (ACEA-1021) NBQX PNQX Selurampanel Tezampanel Theanine Topiramate YM90K Zonampanel; Negative allosteric modulators: Barbiturates (e.g., pentobarbital, sodium thiopental) Cyclopropane Enflurane Ethanol Evans blue GYKI-53,655 Halothane Irampanel Isoflurane Perampanel Pregnenolone sulfate Talampanel

NMDA	Agonists: Glutamate/active site agonists: AMAA Aspartate Glutamate Homocysteic acid (L-HCA) Homoquinolinic acid Ibotenic acid NMDA Proline Quinolinic acid Tetrazolylglycine Theanine; Glycine site agonists: β-Fluoro-D-alanine ACBD ACC (ACPC) ACPD AK-51 CCG D-Alanine D-Cycloserine D-Serine DHPG Glycine HA-966 L-687,414 L-Alanine L-Serine Milacemide Neboglamine NRX-1074 Rapastinel (GLYX-13) Sarcosine; Polyamine site agonists: Spermidine Spermine; Other positive allosteric modulators: 24S-Hydroxycholesterol DHEA DHEA sulfate Pregnenolone sulfate Antagonists: Competitive antagonists: AP5 (APV) AP7 CGP-37849 CGP-39551 CGP-39653 CGP-40116 CGS-19755 CPP LY-233,053 LY-235,959 LY-274,614 MDL-100,453 Midafotel (d-CPPene) NPC-12,626 NPC-17,742 PBPD PEAQX Perzinfotel PPDA SDZ-220581 Selfotel; Noncompetitive antagonists: ARR-15,896 Caroverine Dexanabinol FPL-12495 FR-115,427 Hodgkinsine Magnesium MDL-27,266 NPS-1506 Psychotridine Zinc; Uncompetitive pore blockers: 2-MDP 3-HO-PCP 3-MeO-PCE 3-MeO-PCMo 3-MeO-PCP 4-MeO-PCP 8A-PDHQ 18-MC α-Endopsychosin Alaproclate Amantadine Aptiganel Arketamine ARL-12,495 ARL-15,896-AR ARL-16,247 Budipine Conaridine Delucemine Dexoxadrol Dextrallorphan Dieticyclidine Diphenidine Dizocilpine Ephenidine Esketamine Etoxadrol Eticyclidine Fluorolintane Gacyclidine Ibogaine Ibogamine Indantadol Ketamine Ketobemidone Lanicemine Loperamide Memantine Methadone (Levomethadone) Methorphan (Dextromethorphan Levomethorphan) Methoxetamine Methoxphenidine Milnacipran Morphanol (Dextrorphan Levorphanol) NEFA Neramexane Nitromemantine Nitrous oxide Noribogaine Norketamine Orphenadrine PCPr Pethidine (meperidine) Phencyclamine Phencyclidine Propoxyphene Remacemide Rhynchophylline Rimantadine Rolicyclidine Sabeluzole Tabernanthine Tenocyclidine Tiletamine Tramadol Xenon; Glycine site antagonists: 4-Cl-KYN (AV-101) 5,7-DCKA 7-CKA ACC ACEA-1011 ACEA-1328 AV-101 Carisoprodol CGP-39653 CNQX DNQX Felbamate Gavestinel GV-196,771 Kynurenic acid Kynurenine L-689,560 L-701,324 Licostinel (ACEA-1021) LU-73,068 MDL-105,519 Meprobamate MRZ 2/576 PNQX ZD-9379; NR2B subunit antagonists: Besonprodil CERC-301 (MK-0657) CO-101,244 (PD-174,494) Eliprodil Haloperidol Ifenprodil Isoxsuprine Nylidrin Ro8-4304 Ro25-6981 Traxoprodil; Polyamine site antagonists: Arcaine Co 101676 Diaminopropane Diethylenetriamine Huperzine A Putrescine Ro 25-6981; Unclassified/unsorted antagonists: Bumetanide Chloroform Cyclopropane D-αAA Diethyl ether Enflurane Ethanol Flufenamic acid Flupirtine Furosemide Halothane Isoflurane Metaphit Methoxyflurane Niflumic acid Piretanide Toluene Transcrocetin (saffron) Trichloroethane Trichloroethanol Trichloroethylene Xylene

Kainate	Agonists: Glutamate/active site agonists: 5-Bromowillardiine 5-Iodowillardiine Acromelic acid (acromelate) AMPA ATPA Domoic acid Glutamate Ibotenic acid Kainic acid LY-339,434 Proline Quisqualic acid SYM-2081; Positive allosteric modulators: Cyclothiazide Diazoxide Enflurane Halothane Isoflurane Antagonists: ACEA-1011 CNQX Dasolampanel DNQX GAMS Kynurenic acid Licostinel (ACEA-1021) LY-382,884 NBQX NS102 Selurampanel Tezampanel Theanine Topiramate UBP-302; Negative allosteric modulators: Barbiturates (e.g., pentobarbital, sodium thiopental) Enflurane Ethanol Evans blue NS-3763 Pregnenolone sulfate

mGlu₁	Agonists: ACPD DHPG Glutamate Ibotenic acid Quisqualic acid Ro01-6128 Ro67-4853 Ro67-7476 VU-71 Antagonists: BAY 36-7620 CPCCOEt Cyclothiazide LY-367,385 LY-456,236 MCPG NPS-2390

mGlu₂	Agonists: BINA CBiPES DCG-IV Eglumegad Glutamate Ibotenic acid LY-379,268 LY-404,039 (pomaglumetad) LY-487,379 LY-566,332 MGS-0028 Pomaglumetad methionil (LY-2140023) Talaglumetad; Positive allosteric modulators: JNJ-40411813 (ADX-71149) Antagonists: APICA CECXG EGLU HYDIA LY-307,452 LY-341,495 MCPG MGS-0039 PCCG-4; Negative allosteric modulators: Decoglurant RO4491533

mGlu₃	Agonists: CBiPES DCG-IV Eglumegad Glutamate Ibotenic acid LY-379,268 LY-404,039 (pomaglumetad) LY-487,379 MGS-0028 Pomaglumetad methionil (LY-2140023) Talaglumetad Antagonists: APICA CECXG EGLU HYDIA LY-307,452 LY-341,495 MCPG MGS-0039; Negative allosteric modulators: Decoglurant RO4491533

mGlu₄	Agonists: Glutamate L-AP4 PHCCC VU-001,171 VU-0155,041; Positive allosteric modulators: MPEP Antagonists: CPPG MAP4 MPPG MSOP MTPG UBP-1112

mGlu₅	Agonists: ACPD ADX-47273 CDPPB CHPG DFB DHPG Glutamate Ibotenic acid Quisqualic acid VU-1545 Antagonists: CTEP DMeOB LY-344,545 Mavoglurant MCPG NPS-2390 Remeglurant SIB-1757 SIB-1893; Negative allosteric modulators: Basimglurant Dipraglurant Fenobam GRN-529 MPEP MTEP Raseglurant

mGlu₆	Agonists: Glutamate L-AP4 Antagonists: CPPG MAP4 MPPG MSOP MTPG UBP-1112

mGlu₇	Agonists: AMN082 Glutamate L-AP4 Antagonists: CPPG MAP4 MMPIP MPPG MSOP MTPG UBP-1112

mGlu₈	Agonists: DCPG Glutamate L-AP4 Antagonists: CPPG MAP4 MPPG MSOP MTPG UBP-1112

Transporter
(blockers)

EAATs	Amphetamine Aspartic acid (aspartate) cis-ACBD DHKA Glutamic acid (glutamate) HIP-A HIP-B Kainic acid L-(-)-threo-3-Hydroxyaspartic acid L-αAA L-CCG-III ((2S,3S,4R)-CCG) L-Serine-O-sulphate (SOS) L-trans-2,4-PDC MPDC SYM-2081 TBOA TFB-TBOA Theanine threo-3-Methylglutamic acid UCPH-101 WAY-213,613

vGluTs	4-Methylene-L-glutamate 6-(4'-Phenylstyryl)-QDC 6-Biphenyl-4-yl-QDC 7-CKA Acid red 114 Amido black 10B (naphthol blue black) Bafilomycin A1 Benzopurpurin 4B Bumetamide Chicago sky blue 6B Aspartic acid (aspartate) DIDS Direct blue 71 Erythro-4-methyl-L-glutamic acid Evans blue Furosemide Glutamic acid (glutamate) Kynurenic acid Nigericin NPPB (N144) Ponceau SS Reactive blue 2 Rose bengal SITS trans-ACDP Trypan blue Valinomycin Xanthurenic acid

Enzyme
(inhibitors)

GAH	BPTES CB-839 DON

AST	2-Amino-3-butenoic acid AAOA AMB β-DL-Methylene-aspartate Hydrazinosuccinate

ALT	β-Chloro-L-alanine L-Cycloserine Propargylglycine

GDH	AAOA Bithionol Chloroquine EGCG GTP GW5074 Hexachlorophene Hydroxylamine Palmitoyl-CoA Pyridoxal phosphate

GS	2-Aminoadipic acid JFD01307SC Methionine sulfoximine Phosphinothricin (glufosinate)

GAD	3-Mercaptopropionic acid AAOA L-Allylglycine Semicarbazide

Others

Precursors: GHB
L-Glutamine

See also: GABAergics • GHBergics • Glycinergics

Authority control	LCCN: sh85008689 GND: 4211533-4

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