Glutamic acid

Abbrev. E, Glu
Full Name Glutamic acid
Side chain type
acidic
Mass
147.13
pl
3.15
pK1(α-COOH)
2.10
pK2(α-+NH3)
9.47
pKr (R)
4.07

Side chain -CH2SH
Hydro- phobic
yes
Polar
no
Charged
no
Small
yes
Tiny
no
Aromatic or Aliphatic
no
van der Waals volume
91
Codon
GAU, GAC
Occurrence in proteins (%)
5.3

Remarks: Behaves similar to aspartic acid. Has longer, slightly more flexible side chain.

Glutamic acid (Glu) or glutamate (the anionic form) is one of the 20 standard amino acids used by all organisms in their proteins. Glu is critical for proper cell function, but it is not an essential nutrient in humans because it can be produced from other compounds.

Structure

As its name indicates, it is acidic, with a carboxylic acid component to its side chain.

A three-letter designation for either Gln or Glu is Glx. The one-letter abbreviation is E for glutamic acid and Q for glutamine.

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