Glutamic acid (symbol Glu or E; known as glutamate in its anionic form) is an α-amino acid that is used by almost all living beings in the biosynthesis of proteins. It is a non-essential nutrient for humans, meaning that the human body can synthesize enough for its use. It is also the most abundant excitatory neurotransmitter in the vertebrate nervous system. It serves as the precursor for the synthesis of the inhibitory gamma-aminobutyric acid (GABA) in GABAergic neurons.
Its molecular formula is C5H9NO4. Glutamic acid exists in two optically isomeric forms; the dextrorotatory L-form is usually obtained by hydrolysis of gluten or from the waste waters of beet-sugar manufacture or by fermentation. Its molecular structure could be idealized as HOOC−CH(NH2)−(CH2)2−COOH, with two carboxyl groups −COOH and one amino group −NH2. However, in the solid state and mildly acidic water solutions, the molecule assumes an electrically neutral zwitterion structure −OOC−CH(NH+3)−(CH2)2−COOH. It is encoded by the codons GAA or GAG.
The acid can lose one proton from its second carboxyl group to form the conjugate base, the singly-negative anion glutamate −OOC−CH(NH+3)−(CH2)2−COO−. This form of the compound is prevalent in neutral solutions. The glutamate neurotransmitter plays the principal role in neural activation. This anion creates the savory umami flavor of foods and is found in glutamate flavorings such as monosodium glutamate (MSG). In Europe, it is classified as food additive E620. In highly alkaline solutions the doubly negative anion −OOC−CH(NH2)−(CH2)2−COO− prevails. The radical corresponding to glutamate is called glutamyl.
The one-letter symbol E for glutamate was assigned as the letter following D for aspartate, as glutamate is larger by one methylene –CH2– group. |
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InChI=1S/C5H9NO4/c6-3(5(9)10)1-2-4(7)8/h3H,1-2,6H2,(H,7,8)(H,9,10) |
WHUUTDBJXJRKMK-UHFFFAOYSA-N |
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Mus musculus
(NCBI:txid10090)
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Source: BioModels - MODEL1507180067
See:
PubMed
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Daphnia magna
(NCBI:txid35525)
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See:
Mixtures of similarly acting compounds in Daphnia magna: From gene to metabolite and beyondTine Vandenbrouck, Oliver A.H. Jones, Nathalie Dom, Julian L. Griffin, Wim De CoenEnvironment International 36 (2010) 254-268
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Bronsted base
A molecular entity capable of accepting a hydron from a donor (Bronsted acid).
(via organic amino compound )
Bronsted acid
A molecular entity capable of donating a hydron to an acceptor (Bronsted base).
(via oxoacid )
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fundamental metabolite
Any metabolite produced by all living cells.
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View more via ChEBI Ontology
2-aminopentanedioic acid
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glutamic acid
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2-Aminoglutaric acid
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KEGG COMPOUND
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DL-Glutamic acid
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KEGG DRUG
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DL-Glutaminic acid
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KEGG COMPOUND
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E
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ChEBI
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Glu
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ChEBI
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Glutamate
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KEGG COMPOUND
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Glutamic acid
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KEGG COMPOUND
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Glutaminic acid
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KEGG COMPOUND
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Glutaminsäure
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ChEBI
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101971
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Gmelin Registry Number
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Gmelin
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1723799
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Reaxys Registry Number
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Reaxys
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617-65-2
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CAS Registry Number
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ChemIDplus
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617-65-2
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CAS Registry Number
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NIST Chemistry WebBook
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