- EMDB-44123: Cryo-EM density of GluK2 amino-terminal domain (GluK2-ATD) from t... -
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基本情報
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データベース: EMDB / ID: EMD-44123
タイトル
Cryo-EM density of GluK2 amino-terminal domain (GluK2-ATD) from the open-state structure of kainate receptor GluK2 in complex with agonist glutamate and positive allosteric modulator BPAM344 bound to ConA
マップデータ
試料
複合体: full-length rat GluK2 tetramer in complex with two concanavalin A dimers
タンパク質・ペプチド: Glutamate ionotropic receptor Kainate type subunit 2
キーワード
kainate receptor / GluK2 / positive allosteric modulator / BPAM344 / open / concanavalin A / ConA / amino-terminal domain / ATD / glutamate / MEMBRANE PROTEIN
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
R01 NS083660
米国
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
R01 NS107253
米国
National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS)
R01 AR078814
米国
National Institutes of Health/National Cancer Institute (NIH/NCI)
R01 CA206573
米国
引用
ジャーナル: Nature / 年: 2024 タイトル: Kainate receptor channel opening and gating mechanism. 著者: Shanti Pal Gangwar / Maria V Yelshanskaya / Kirill D Nadezhdin / Laura Y Yen / Thomas P Newton / Muhammed Aktolun / Maria G Kurnikova / Alexander I Sobolevsky / 要旨: Kainate receptors, a subclass of ionotropic glutamate receptors, are tetrameric ligand-gated ion channels that mediate excitatory neurotransmission. Kainate receptors modulate neuronal circuits and ...Kainate receptors, a subclass of ionotropic glutamate receptors, are tetrameric ligand-gated ion channels that mediate excitatory neurotransmission. Kainate receptors modulate neuronal circuits and synaptic plasticity during the development and function of the central nervous system and are implicated in various neurological and psychiatric diseases, including epilepsy, depression, schizophrenia, anxiety and autism. Although structures of kainate receptor domains and subunit assemblies are available, the mechanism of kainate receptor gating remains poorly understood. Here we present cryo-electron microscopy structures of the kainate receptor GluK2 in the presence of the agonist glutamate and the positive allosteric modulators lectin concanavalin A and BPAM344. Concanavalin A and BPAM344 inhibit kainate receptor desensitization and prolong activation by acting as a spacer between the amino-terminal and ligand-binding domains and a stabilizer of the ligand-binding domain dimer interface, respectively. Channel opening involves the kinking of all four pore-forming M3 helices. Our structures reveal the molecular basis of kainate receptor gating, which could guide the development of drugs for treatment of neurological disorders.