"NMDA" redirects here. For National Minimum Drinking Age, see National Minimum Drinking Age Act.
N-Methyl-D-aspartic acid
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Names |
IUPAC name
(2R)-2-(Methylamino)butanedioic acid[1]
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Other names
N-Methylaspartate; N-Methyl-D-aspartate; NMDA
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Identifiers |
CAS Number
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6384-92-5 Y |
Beilstein Reference
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1724431 |
ChEBI |
CHEBI:31882 Y |
ChEMBL |
ChEMBL291278 Y |
ChemSpider |
21436 Y |
IUPHAR/BPS
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4268 |
Jmol interactive 3D |
Image
Image |
KEGG |
C12269 Y |
MeSH |
N-Methylaspartate |
PubChem |
22880 |
RTECS number |
CI9457000 |
InChI
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InChI=1 S/C5H9NO4/c1-6-3(5(9)10)2-4(7)8/h3,6H,2H2,1H3,(H,7,8)(H,9,10)/t3-/m1/s1
Key: HOKKHZGPKSLGJE-GSVOUGTGSA-N
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SMILES
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CN[C@H](Cc(:[o]):[o])c(:[o]):[o]
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CN[C@H](CC(O)=O)C(O)=O
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Properties |
Chemical formula
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C5H9NO4 |
Molar mass |
147.13 g·mol−1 |
Appearance |
White, opaque crystals |
Odor |
Odorless |
Melting point |
189 to 190 °C (372 to 374 °F; 462 to 463 K) |
log P |
1.39 |
Acidity (pKa) |
2.206 |
Basicity (pKb) |
11.791 |
Hazards |
S-phrases |
S22, S24/25 |
Lethal dose or concentration (LD, LC): |
LD50 (Median dose)
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137 mg kg−1 (intraperitoneal, mouse) |
Related compounds |
Related amino acid derivatives
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- Sarcosine
- Dimethylglycine
- beta-Methylamine-L-alanine
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Related compounds
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Dimethylacetamide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Y verify (what is YN ?) |
Infobox references |
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N-Methyl-D-aspartic acid or N-Methyl-D-aspartate (NMDA) is an amino acid derivative that acts as a specific agonist at the NMDA receptor mimicking the action of glutamate, the neurotransmitter which normally acts at that receptor. Unlike glutamate, NMDA only binds to and regulates the NMDA receptor and has no effect on other glutamate receptors (such as those for AMPA and kainate). NMDA receptors are particularly important when they become overactive during withdrawal from alcohol as this causes symptoms such as agitation and, sometimes, epileptiform seizures.
Contents
- 1 Biological function
- 2 Antagonists
- 3 References
- 4 See also
- 5 Further reading
Biological function
NMDA is a water-soluble synthetic substance that is not normally found in biological tissue. It was first synthesized in the 1960s. NMDA is an excitotoxin (it kills nerve cells by over-exciting them); this trait has applications in behavioral neuroscience research. The body of work utilizing this technique falls under the term "lesion studies". Researchers apply NMDA to specific regions of an (animal) subject's brain or spinal cord and subsequently test for the behavior of interest, such as operant behavior. If the behavior is compromised, it suggests the destroyed tissue was part of a brain region that made an important contribution to the normal expression of that behavior.
However, in lower quantities NMDA is not neurotoxic. In fact, normal operation of the NMDA receptor allows individuals to respond to excitatory stimuli through the interrelated functioning of NMDA receptors, glutamate, and dopamine.
Therefore the action of glutamate specifically through NMDA receptors can be investigated by injecting small quantities of NMDA into a certain region in the brain: for example, injection of NMDA in a brainstem region induces involuntary locomotion in cats and rats.
The mechanism of stimulating NMDA receptor is a specific agonist-binding to its NR2 subunits, and then a non-specific cation channel is opened, which can allow the passage of Ca2+ and Na+ into the cell and K+ out of the cell. The excitatory postsynaptic potential (EPSP) produced by activation of an NMDA receptor also increases the concentration of Ca2+ in the cell. The Ca2+ can in turn function as a second messenger in various signaling pathways.[2][3][4][5] This process is modulated by a number of endogenous and exogenous compounds and plays a key role in a wide range of physiological (e.g. memory) and pathological processes (e.g. Excitotoxicity).
Antagonists
Main article: NMDA receptor antagonist
Examples of antagonists of the NMDA receptor are APV, Amantadine, dextromethorphan (DXM), ketamine, tiletamine, phencyclidine (PCP), riluzole, memantine, methoxetamine (MXE), methoxphenidine (MXP) and kynurenic acid; the latter is the only known endogenous antagonist. They are commonly referred to as NMDA receptor antagonists.
References
- ^ "N-Methylaspartate - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 24 June 2005. Identification. Retrieved 9 January 2012.
- ^ Dingledine, R; Borges K (Mar 1999). "The glutamate receptor ion channels". Pharmacol Rev. 51 (1): 7–61. PMID 10049997.
- ^ Liu, Y; Zhang J (Oct 2000). "Recent development in NMDA receptors". Chin Med J (Engl) 113 (10): 948–56. PMID 11775847.
- ^ Cull-Candy, S; Brickley S (Jun 2001). "NMDA receptor subunits: diversity, development and disease". Current Opinion in Neurobiology 11 (3): 327–35. doi:10.1016/S0959-4388(00)00215-4. PMID 11399431.
- ^ Paoletti, P; Neyton J (Feb 2007). "NMDA receptor subunits: function and pharmacology". Current Opinion in Pharmacology 7 (1): 39–47. doi:10.1016/j.coph.2006.08.011. PMID 17088105.
See also
- NMDA receptor
- NMDA receptor antagonist
- Anti-NMDA-receptor encephalitis
Further reading
- Watkins, Jeffrey C.; Jane, David E. (2006), "The glutamate story", Br. J. Pharmacol. 147 (Suppl. 1): S100–8, doi:10.1038/sj.bjp.0706444, PMC 1760733, PMID 16402093
- Blaise, Mathias-Costa; Sowdhamini, Ramanathan; Rao, Metpally Raghu Prasad; Pradhan, Nithyananda (2004), "Evolutionary trace analysis of ionotropic glutamate receptor sequences and modeling the interactions of agonists with different NMDA receptor subunits", J. Mol. Model. 10 (5-6): 305–16, doi:10.1007/s00894-004-0196-7, PMID 15597199
Glutamatergics
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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
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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
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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
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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
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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
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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
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mGlu4 |
- Agonists: Glutamate
- L-AP4
- PHCCC
- VU-001,171
- VU-0155,041; Positive allosteric modulators: MPEP
- Antagonists: CPPG
- MAP4
- MPPG
- MSOP
- MTPG
- UBP-1112
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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
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mGlu6 |
- Agonists: Glutamate
- L-AP4
- Antagonists: CPPG
- MAP4
- MPPG
- MSOP
- MTPG
- UBP-1112
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mGlu7 |
- Agonists: AMN082
- Glutamate
- L-AP4
- Antagonists: CPPG
- MAP4
- MMPIP
- MPPG
- MSOP
- MTPG
- UBP-1112
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mGlu8 |
- Agonists: DCPG
- Glutamate
- L-AP4
- Antagonists: CPPG
- MAP4
- MPPG
- MSOP
- MTPG
- UBP-1112
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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
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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
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Enzyme
(inhibitors) |
GAH |
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AST |
- 2-Amino-3-butenoic acid
- AAOA
- AMB
- β-DL-Methylene-aspartate
- Hydrazinosuccinate
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ALT |
- β-Chloro-L-alanine
- L-Cycloserine
- Propargylglycine
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GDH |
- AAOA
- Bithionol
- Chloroquine
- EGCG
- GTP
- GW5074
- Hexachlorophene
- Hydroxylamine
- Palmitoyl-CoA
- Pyridoxal phosphate
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GS |
- 2-Aminoadipic acid
- JFD01307SC
- Methionine sulfoximine
- Phosphinothricin (glufosinate)
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GAD |
- 3-Mercaptopropionic acid
- AAOA
- L-Allylglycine
- Semicarbazide
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Others |
- Precursors: GHB
- L-Glutamine
- Cofactors: α-Ketoglutaric acid
- Iron
- Sulfur
- Vitamin B2
- Vitamin B3
- Others: Acamprosate
- Cysteine
- Cytidine
- Cytisine
- Glutathione
- Glutathione disulfide
- Minocycline
- N-Acetylcysteine
- Riluzole
- S-Nitrosoglutathione
- Tianeptine
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See also: GABAergics • GHBergics • Glycinergics
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