Biostructural and pharmacological studies of bicyclic analogues of the 3-isoxazolol glutamate receptor agonist ibotenic acid.Frydenvang, K., Pickering, D.S., Greenwood, J.R., Krogsgaard-Larsen, N., Brehm, L., Nielsen, B., Vogensen, S.B., Hald, H., Kastrup, J.S., Krogsgaard-Larsen, P., Clausen, R.P.
(2010) J Med Chem 53: 8354-8361
- PubMed: 21067182
- DOI: 10.1021/jm101218a
- Structures With Same Primary Citation
- PubMed Abstract:
- Three-dimensional structure of the ligand-binding core of GluR2 in complex with the agonist (S)-ATPA: implications for receptor subunit selectivity
Lunn, M.L., Hogner, A., Stensbol, T.B., Gouaux, E., Egebjerg, J., Kastrup, J.S.
(2003) J Med Chem 46: 872
- Mechanisms for activation and antagonism of an AMPA-sensitive glutamate receptor: Crystal structures of the GluR2 ligand binding core
Armstrong, N., Gouaux, E.
(2000) Neuron 28: 165
We describe an improved synthesis and detailed pharmacological characterization of the conformationally restricted analogue of the naturally occurring nonselective glutamate receptor agonist ibotenic acid (RS)-3-hydroxy-4,5,6,7-tetrahydroisoxazolo[5, ...
We describe an improved synthesis and detailed pharmacological characterization of the conformationally restricted analogue of the naturally occurring nonselective glutamate receptor agonist ibotenic acid (RS)-3-hydroxy-4,5,6,7-tetrahydroisoxazolo[5,4-c]pyridine-7-carboxylic acid (7-HPCA, 5) at AMPA receptor subtypes. Compound 5 was shown to be a subtype-discriminating agonist at AMPA receptors with higher binding affinity and functional potency at GluA1/2 compared to GluA3/4, unlike the isomeric analogue (RS)-3-hydroxy-4,5,6,7-tetrahydroisoxazolo[5,4-c]pyridine-5-carboxylic acid (5-HPCA, 4) that binds to all AMPA receptor subtypes with comparable potency. Biostructural X-ray crystallographic studies of 4 and 5 reveal different binding modes of (R)-4 and (S)-5 in the GluA2 agonist binding domain. WaterMap analysis of the GluA2 and GluA4 binding pockets with (R)-4 and (S)-5 suggests that the energy of hydration sites is ligand dependent, which may explain the observed selectivity.
Department of Medicinal Chemistry.