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Glutamic acid (symbol Glu or E; [4] the anionic form is known as glutamate) 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.
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Glutamate flavoring is the generic name for flavor-enhancing compounds based on glutamic acid and its salts (glutamates). These compounds provide an umami (savory) taste to food. Glutamic acid and glutamates are natural constituents of many fermented or aged foods, including soy sauce, fermented bean paste, and cheese.
Polyglutamic acid (PGA) is a polymer of the amino acid glutamic acid (GA). Depending on where the individual monomers connect, PGA can be gamma PGA (poly-γ-glutamic acid, γ-PGA), the form where the peptide bonds are between the amino group of GA and the carboxyl group at the end of the GA side chain, or alpha PGA, the form where the alpha-carboxyl is used to form the peptide bond.
Corynebacterium glutamicum is a Gram-positive, rod-shaped bacterium that is used industrially for large-scale production of amino acids, [3] [4] especially glutamic acid and lysine. [5] While originally identified in a screen for organisms secreting L-glutamate , mutants of C. glutamicum have also been identified that produce various other ...
Structurally, the glutamate anion is zwitterionic, with the amino group protonated (pK a = 9.47) and both carboxylic-acid groups (pK a = 2.10, 4.07) in their deprotonated carboxylate form. [ 6 ] Calcium di- L -glutamate can be used to prepare other glutamates through metathesis with a soluble sulfate, carbonate or hydroxide salt.
γ-L-Glutamyl-L-cysteine, also known as γ-glutamylcysteine (GGC), is a dipeptide found in animals, plants, fungi, some bacteria, and archaea.It has a relatively unusual γ-bond between the constituent amino acids, L-glutamic acid and L-cysteine and is a key intermediate in the γ-glutamyl cycle first described by Meister in the 1970s.
Glutamine is the most abundant amino acid in the plasma and an additional energy source in tumor cells especially when glycolytic energy production is low due to a high amount of the dimeric form of M2-PK. Glutamine and its degradation products glutamate and aspartate are precursors for nucleic acid and serine synthesis.