+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 8fq8 | ||||||
---|---|---|---|---|---|---|---|
タイトル | LBD conformation 1 (LBDconf1) of GluA2 flip Q isoform of AMPA receptor in complex with gain-of-function TARP gamma2, with 140mM NMDG, 330uM CTZ, and 100mM L-glutamate (Open-Na110) | ||||||
要素 | Glutamate receptor 2 | ||||||
キーワード | TRANSPORT PROTEIN / Inotropic glutamate receptors / AMPA receptors / ligand gated ion channel / auxiliary subunit / TARP / stargazin / TARP gamma2 / glutamate / calcium / neurotransmitter receptor / synaptic transmission | ||||||
機能・相同性 | 機能・相同性情報 spine synapse / dendritic spine neck / dendritic spine head / Activation of AMPA receptors / perisynaptic space / AMPA glutamate receptor activity / ligand-gated monoatomic cation channel activity / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / extracellularly glutamate-gated ion channel activity ...spine synapse / dendritic spine neck / dendritic spine head / Activation of AMPA receptors / perisynaptic space / AMPA glutamate receptor activity / ligand-gated monoatomic cation channel activity / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / extracellularly glutamate-gated ion channel activity / immunoglobulin binding / AMPA glutamate receptor complex / kainate selective glutamate receptor activity / ionotropic glutamate receptor complex / cellular response to glycine / asymmetric synapse / regulation of receptor recycling / Unblocking of NMDA receptors, glutamate binding and activation / glutamate receptor binding / positive regulation of synaptic transmission / extracellular ligand-gated monoatomic ion channel activity / glutamate-gated receptor activity / response to fungicide / glutamate-gated calcium ion channel activity / presynaptic active zone membrane / regulation of synaptic transmission, glutamatergic / ionotropic glutamate receptor binding / somatodendritic compartment / dendrite membrane / cellular response to brain-derived neurotrophic factor stimulus / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / cytoskeletal protein binding / dendrite cytoplasm / ionotropic glutamate receptor signaling pathway / SNARE binding / dendritic shaft / synaptic transmission, glutamatergic / synaptic membrane / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / PDZ domain binding / protein tetramerization / postsynaptic density membrane / establishment of protein localization / modulation of chemical synaptic transmission / Schaffer collateral - CA1 synapse / terminal bouton / receptor internalization / cerebral cortex development / synaptic vesicle membrane / synaptic vesicle / presynapse / signaling receptor activity / presynaptic membrane / amyloid-beta binding / growth cone / scaffold protein binding / chemical synaptic transmission / perikaryon / postsynaptic membrane / dendritic spine / postsynaptic density / neuron projection / axon / neuronal cell body / glutamatergic synapse / dendrite / synapse / protein-containing complex binding / protein kinase binding / cell surface / endoplasmic reticulum / protein-containing complex / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | Rattus norvegicus (ドブネズミ) | ||||||
手法 | 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.11 Å | ||||||
データ登録者 | Nakagawa, T. | ||||||
資金援助 | 米国, 1件
| ||||||
引用 | ジャーナル: Nat Struct Mol Biol / 年: 2024 タイトル: The open gate of the AMPA receptor forms a Ca binding site critical in regulating ion transport. 著者: Terunaga Nakagawa / Xin-Tong Wang / Federico J Miguez-Cabello / Derek Bowie / 要旨: Alpha-amino-3-hydroxyl-5-methyl-4-isoxazole-propionic acid receptors (AMPARs) are cation-selective ion channels that mediate most fast excitatory neurotransmission in the brain. Although their gating ...Alpha-amino-3-hydroxyl-5-methyl-4-isoxazole-propionic acid receptors (AMPARs) are cation-selective ion channels that mediate most fast excitatory neurotransmission in the brain. Although their gating mechanism has been studied extensively, understanding how cations traverse the pore has remained elusive. Here we investigated putative ion and water densities in the open pore of Ca-permeable AMPARs (rat GRIA2 flip-Q isoform) at 2.3-2.6 Å resolution. We show that the ion permeation pathway attains an extracellular Ca binding site (site-G) when the channel gate moves into the open configuration. Site-G is highly selective for Ca over Na, favoring the movement of Ca into the selectivity filter of the pore. Seizure-related N619K mutation, adjacent to site-G, promotes channel opening but attenuates Ca binding and thus diminishes Ca permeability. Our work identifies the importance of site-G, which coordinates with the Q/R site of the selectivity filter to ensure the preferential transport of Ca through the channel pore. | ||||||
履歴 |
|
-構造の表示
構造ビューア | 分子: MolmilJmol/JSmol |
---|
-ダウンロードとリンク
-ダウンロード
PDBx/mmCIF形式 | 8fq8.cif.gz | 261.3 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb8fq8.ent.gz | 182.6 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 8fq8.json.gz | ツリー表示 | PDBx/mmJSON形式 | |
その他 | その他のダウンロード |
-検証レポート
文書・要旨 | 8fq8_validation.pdf.gz | 1.8 MB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 8fq8_full_validation.pdf.gz | 1.8 MB | 表示 | |
XML形式データ | 8fq8_validation.xml.gz | 51.4 KB | 表示 | |
CIF形式データ | 8fq8_validation.cif.gz | 71.5 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/fq/8fq8 ftp://data.pdbj.org/pub/pdb/validation_reports/fq/8fq8 | HTTPS FTP |
-関連構造データ
関連構造データ | 29380MC 8fp4C 8fp9C 8fpcC 8fpgC 8fphC 8fpkC 8fplC 8fpsC 8fpvC 8fpyC 8fpzC 8fq1C 8fq2C 8fq3C 8fq5C 8fq6C 8fqaC 8fqbC 8fqdC 8fqeC 8fqfC 8fqgC 8fqhC 8fr0C C: 同じ文献を引用 (文献) M: このデータのモデリングに利用したマップデータ |
---|---|
類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
|
-要素
#1: タンパク質 | 分子量: 99559.461 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) Rattus norvegicus (ドブネズミ) / 遺伝子: Gria2, Glur2 / 細胞株 (発現宿主): HEK / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P19491 #2: 化合物 | ChemComp-GLU / #3: 化合物 | ChemComp-CYZ / #4: 水 | ChemComp-HOH / | 研究の焦点であるリガンドがあるか | Y | |
---|
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
---|---|
EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
-試料調製
構成要素 | 名称: Homotetrameric assembly of GluA2 flip-Q isoform in complex with TARP gamma2 (K52E, K53E). Dimer-of-dimers assembly. タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT | ||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
分子量 | 値: 0.5 MDa / 実験値: NO | ||||||||||||||||
由来(天然) | 生物種: Rattus norvegicus (ドブネズミ) | ||||||||||||||||
由来(組換発現) | 生物種: Homo sapiens (ヒト) / 細胞: HEK | ||||||||||||||||
緩衝液 | pH: 8 詳細: L-glutamic acid (100mM) and cyclothiazide (CTZ, 0.33mM) were added before freezing. The 1 M L-glutamic acid stock solution was adjusted to pH 7.4 using NaOH. | ||||||||||||||||
緩衝液成分 |
| ||||||||||||||||
試料 | 濃度: 10 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 | ||||||||||||||||
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277.15 K |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
---|---|
顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: FIELD EMISSION GUN / 加速電圧: 300 kV / 照射モード: FLOOD BEAM |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 130000 X / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 600 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm / アライメント法: COMA FREE |
試料ホルダ | 凍結剤: NITROGEN 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
撮影 | 電子線照射量: 52 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) 撮影したグリッド数: 1 / 実像数: 30384 |
-解析
EMソフトウェア |
| ||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C2 (2回回転対称) | ||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.11 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 189181 / アルゴリズム: FOURIER SPACE / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||
拘束条件 |
|