Ab initio studies of receptor interactions with AMPA ((S)-2-amino-3-(3-hydroxy-5-methyl-4-isoxazolyl) propionic acid) and kainic acid (2S-(2 alpha, 3 beta, 4 beta))-2-carboxy-4-(1-methylethenyl)-3-pyrrolidineacetic acid

J Mol Model. 2009 Sep;15(9):1109-17. doi: 10.1007/s00894-009-0460-y. Epub 2009 Feb 21.

Abstract

The optimum geometries and binding energies of the complexes formed by AMPA and Kainic acid, as well as their anions with tyrosine, proline and some tripeptides are investigated with quantum chemical calculations (HF/6-31G**). It was found that receptors featuring the Tyr-Ala-Pro sequence exhibit stronger binding energies to the substrates than the Tyr-Ser-Pro and Tyr-Ser-Ser. As expected, the anions are more bound than the neutral species. This work can lead to investigations on the effect of AMPA receptors mutations on the brain functions, possibly related to criminal tendencies.

MeSH terms

  • Alanine / chemistry
  • Amino Acid Sequence
  • Animals
  • Behavior
  • Brain / metabolism
  • Excitatory Amino Acid Agonists / chemistry*
  • Excitatory Amino Acid Agonists / metabolism
  • Humans
  • Kainic Acid / chemistry*
  • Kainic Acid / metabolism
  • Molecular Sequence Data
  • Mutation
  • Proline / chemistry
  • Quantum Theory
  • Receptors, AMPA / chemistry*
  • Receptors, AMPA / genetics
  • Receptors, AMPA / metabolism
  • Thermodynamics
  • Tyrosine / chemistry
  • alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid / chemistry*
  • alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid / metabolism

Substances

  • Excitatory Amino Acid Agonists
  • Receptors, AMPA
  • Tyrosine
  • alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid
  • Proline
  • Alanine
  • Kainic Acid