ISDA

Entry Detail

PDB ID:

3BFT

Keywords:

MEMBRANE PROTEIN

Title:

Structure of the ligand-binding core of GluR2 in complex with the agonist (S)-TDPA at 2.25 A resolution

Biological Source:

Source Organism:

Rattus norvegicus

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2007-11-23

Release Date:

2008-10-28

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.27 Å

R-Value Free:

0.25

R-Value Work:

0.20

Space Group:

P 21 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Glutamate receptor 2
Chain IDs:A, B, C
Chain Length:263
Number of Molecules:3
Biological Source:Rattus norvegicus

UniProt ID:P19491 Pfam ID:PF10613, PF00060

Ligand Molecules

CAC

S2P

Primary Citation

Structures of the ligand-binding core of iGluR2 in complex with the agonists (R)- and (S)-2-amino-3-(4-hydroxy-1,2,5-thiadiazol-3-yl)propionic acid explain their unusual equipotency.

Beich-Frandsen, M, Pickering, D.S, Mirza, O, Johansen, T.N, Greenwood, J, Vestergaard, B, Schousboe, A, Gajhede, M, Liljefors, T, Kastrup, J.S, Armstrong, N, Gouaux, E.Show

J.Med.Chem. 51 1459 1463 (2008)

PMID: 18269227 DOI: 10.1021/jm701126w

Abstact

AMPA-type ionotropic glutamate receptors generally display high stereoselectivity in agonist binding. However, the stereoisomers of 2-amino-3-(4-hydroxy-1,2,5-thiadiazol-3-yl)propionic acid (TDPA) have similar enantiopharmacology. To understand this observation, we have determined the X-ray structures of (R)-TDPA and (S)-TDPA in complex with the ligand-binding core of iGluR2 and investigated the binding pharmacology at AMPA and kainate receptors. Both enantiomers induce full domain closure in iGluR2 but adopt different conformations when binding to the receptor, which may explain the similar enantiopharmacology.

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