1MXV

crystal titration experiments (AMPA co-crystals soaked in 10 mM BrW)

1MXV の概要

• エントリーDOI: 10.2210/pdb1mxv/pdb
• 関連するPDBエントリー: 1FTM 1MQH 1MXU 1MXW 1MXX 1MXY 1MXZ 1MY0 1MY1 1MY2 1MY3
• 分子名称: GLUTAMATE RECEPTOR 2, ZINC ION (3 entities in total)
• 機能のキーワード: ionotropic glutamate receptor, glur2, ligand binding core, s1s2, partial agonist, bromo-willardiine, ampa, crystal titration, membrane protein
• 由来する生物種: Rattus norvegicus (Norway rat); 詳細
• 細胞内の位置: Cell membrane; Multi-pass membrane protein: P19491
• タンパク質・核酸の鎖数: 3
• 化学式量合計: 87992.09

構造登録者

Jin, R.,Gouaux, E. (登録日: 2002-10-03, 公開日: 2003-06-10, 最終更新日: 2024-10-16)

主引用文献

Jin, R.,Gouaux, E.
Probing the Function, Conformational Plasticity, and Dimer-Dimer Contacts of the GluR2 Ligand-Binding Core: Studies of 5-Substituted Willardiines and GluR2 S1S2 in the Crystal
Biochemistry, 42:5201-5213, 2003

PubMed Abstract: Numerous naturally occurring and synthetic alpha-amino acids act as agonists on (S)-2-amino-3-(3-hydroxy-5-methyl-4-isoxazole) propionic acid (AMPA) receptors but nevertheless display significant differences in their functional properties and modes of interaction. The 5-substituted willardiines are a series of compounds that exhibit a range of affinities, act as partial agonists, and give rise to intermediate levels of activation and desensitization. However, the molecular basis for the activities of 5-substituted willardiines has not been conclusively elaborated at the level of atomic resolution. Here we provide insight into the molecular basis of the potency and efficacy elicited by the 5-substituted willardiines on the basis of cocrystal structures with the GluR2 ligand-binding core. We also show that the crystallized ligand-binding core has an affinity for agonists similar to the ligand-binding core in solution. Analysis of multiple crystal lattices suggests modes by which the ligand-binding core dimers interact in the tetrameric receptor. These studies further our understanding of how subtle differences in the structures of agonists are correlated to changes in the conformation of residues and water molecules in the immediate binding pocket and to the degree of domain closure.

PubMed: 12731861
DOI: 10.1021/bi020632t

実験手法

X-RAY DIFFRACTION (1.95 Å)