5IDF

Cryo-EM structure of GluA2/3 AMPA receptor heterotetramer (model II)

5IDF の概要

• エントリーDOI: 10.2210/pdb5idf/pdb
• 関連するPDBエントリー: 5fwy
• EMDBエントリー: 8091
• 分子名称: Glutamate receptor 2, Glutamate receptor 3 (2 entities in total)
• 機能のキーワード: ampa glutamate receptor, signaling 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 P19492
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 393477.70

構造登録者

Herguedas, B.,Garcia-Nafria, J.,Fernandez-Leiro, R.,Greger, I.H. (登録日: 2016-02-24, 公開日: 2016-03-16, 最終更新日: 2024-05-15)

主引用文献

Herguedas, B.,Garcia-Nafria, J.,Cais, O.,Fernandez-Leiro, R.,Krieger, J.,Ho, H.,Greger, I.H.
Structure and organization of heteromeric AMPA-type glutamate receptors.
Science, 352:aad3873-aad3873, 2016

PubMed Abstract: AMPA-type glutamate receptors (AMPARs), which are central mediators of rapid neurotransmission and synaptic plasticity, predominantly exist as heteromers of the subunits GluA1 to GluA4. Here we report the first AMPAR heteromer structures, which deviate substantially from existing GluA2 homomer structures. Crystal structures of the GluA2/3 and GluA2/4 N-terminal domains reveal a novel compact conformation with an alternating arrangement of the four subunits around a central axis. This organization is confirmed by cysteine cross-linking in full-length receptors, and it permitted us to determine the structure of an intact GluA2/3 receptor by cryogenic electron microscopy. Two models in the ligand-free state, at resolutions of 8.25 and 10.3 angstroms, exhibit substantial vertical compression and close associations between domain layers, reminiscent of N-methyl-D-aspartate receptors. Model 1 resembles a resting state and model 2 a desensitized state, thus providing snapshots of gating transitions in the nominal absence of ligand. Our data reveal organizational features of heteromeric AMPARs and provide a framework to decipher AMPAR architecture and signaling.

PubMed: 26966189
DOI: 10.1126/science.aad3873

実験手法

ELECTRON MICROSCOPY (10.31 Å)