Glutamic Acid
Glutamic Acid — An acidic amino acid (Glu, E) that functions as a major excitatory neurotransmitter in the central nervous system.
What Is Glutamic Acid?
Glutamic acid (Glu, E) is a negatively charged amino acid with a carboxyl side chain one carbon longer than aspartate (MW: 147.13 Da, pKa ~4.25). It forms salt bridges, coordinates metals, and is the most common residue in alpha-helical coiled-coil interfaces. The gamma-carboxyl linkage in glutathione (gamma-Glu-Cys-Gly) provides protease resistance.
Roles in Peptide Research
- Helix stabilization: Glu has high alpha-helix propensity and stabilizes helical AMPs
- Lactam bridges: Glu side-chain carboxyl forms lactam bridges with Lys side-chain amine
- Drug conjugation: Semaglutide's linker attaches through a Glu spacer
- Neurotransmitter: Glutamate itself is the primary excitatory neurotransmitter in the CNS
Frequently Asked Questions
What is Glutamic Acid?
An acidic amino acid (Glu, E) that functions as a major excitatory neurotransmitter in the central nervous system.
Why is Glutamic Acid important in peptide research?
Glutamic Acid is a fundamental concept in amino acid as it relates to peptide science. It directly influences experimental design, compound characterization, and the reliability of research outcomes across biochemistry and molecular biology disciplines.