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XB-ART-43670
Curr Top Med Chem 2011 Jan 01;117:887-906. doi: 10.2174/156802611795164990.
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Glutamate receptor agonists: stereochemical aspects.

Vogensen SB , Greenwood JR , Bunch L , Clausen RP .


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The neurotransmitter (S)-glutamate [(S)-Glu] is responsible for most of the excitatory neurotransmission in the central nervous system. The effect of (S)-Glu is mediated by both ionotropic and metabotropic receptors. Glutamate receptor agonists are generally α-amino acids with one or more stereogenic centers due to strict requirements in the agonist binding pocket of the activated state of the receptor. By contrast, there are many examples of achiral competitive antagonists. The present review addresses how stereochemistry affects the activity of glutamate receptor ligands. The review focuses mainly on agonists and discusses stereochemical and conformational considerations as well as biostructural knowledge of the agonist binding pockets, which is useful in the design of glutamate receptor agonists. Examples are chosen to demonstrate how stereochemistry not only determines how the agonist binding pocket is filled, but also how it affects the conformational space of the ligand and in this way restricts the recognition of various glutamate receptors, ultimately leading to selectivity.

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