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基本情報
登録情報 | データベース: PDB / ID: 6qkc | ||||||
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タイトル | GluA1/2 In complex with auxiliary subunit gamma-8 | ||||||
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![]() | MEMBRANE PROTEIN / AMPAR / ion channel / GluA1 / GluA2 / tarp | ||||||
機能・相同性 | ![]() Phase 0 - rapid depolarisation / Phase 2 - plateau phase / Cargo concentration in the ER / cellular response to amine stimulus / axonal spine / COPII-mediated vesicle transport / positive regulation of membrane potential / positive regulation of locomotion involved in locomotory behavior / cellular response to ammonium ion / response to sucrose ...Phase 0 - rapid depolarisation / Phase 2 - plateau phase / Cargo concentration in the ER / cellular response to amine stimulus / axonal spine / COPII-mediated vesicle transport / positive regulation of membrane potential / positive regulation of locomotion involved in locomotory behavior / cellular response to ammonium ion / response to sucrose / L-type voltage-gated calcium channel complex / LGI-ADAM interactions / postsynaptic neurotransmitter receptor diffusion trapping / proximal dendrite / myosin V binding / neuron spine / Trafficking of AMPA receptors / channel regulator activity / cellular response to L-glutamate / regulation of AMPA receptor activity / protein phosphatase 2B binding / regulation of monoatomic ion transmembrane transport / conditioned place preference / response to arsenic-containing substance / cellular response to dsRNA / dendritic spine membrane / Synaptic adhesion-like molecules / long-term synaptic depression / beta-2 adrenergic receptor binding / cellular response to peptide hormone stimulus / response to morphine / neuronal cell body membrane / peptide hormone receptor binding / protein kinase A binding / spine synapse / dendritic spine neck / response to psychosocial stress / dendritic spine head / spinal cord development / Activation of AMPA receptors / perisynaptic space / AMPA glutamate receptor activity / transmission of nerve impulse / ligand-gated monoatomic cation channel activity / Trafficking of GluR2-containing AMPA receptors / response to lithium ion / : / immunoglobulin binding / behavioral response to pain / AMPA glutamate receptor complex / kainate selective glutamate receptor activity / ionotropic glutamate receptor complex / cellular response to glycine / extracellularly glutamate-gated ion channel activity / adenylate cyclase binding / excitatory synapse / positive regulation of excitatory postsynaptic potential / asymmetric synapse / regulation of receptor recycling / Unblocking of NMDA receptors, glutamate binding and activation / G-protein alpha-subunit binding / long-term memory / postsynaptic density, intracellular component / positive regulation of synaptic transmission / glutamate receptor binding / regulation of postsynaptic membrane neurotransmitter receptor levels / voltage-gated calcium channel activity / neuronal action potential / response to electrical stimulus / glutamate-gated receptor activity / synapse assembly / regulation of synaptic transmission, glutamatergic / response to fungicide / cytoskeletal protein binding / ionotropic glutamate receptor binding / presynaptic active zone membrane / extracellular ligand-gated monoatomic ion channel activity / somatodendritic compartment / glutamate-gated calcium ion channel activity / cellular response to brain-derived neurotrophic factor stimulus / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / dendrite membrane / calcium channel regulator activity / dendrite cytoplasm / ionotropic glutamate receptor signaling pathway / positive regulation of synaptic transmission, glutamatergic / SNARE binding / dendritic shaft / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / synaptic transmission, glutamatergic / PDZ domain binding / protein tetramerization / cellular response to amino acid stimulus / response to cocaine / establishment of protein localization / synaptic membrane / modulation of chemical synaptic transmission / response to nutrient levels / postsynaptic density membrane / : 類似検索 - 分子機能 | ||||||
生物種 | ![]() ![]() | ||||||
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: 4.4 Å | ||||||
![]() | Herguedas, B. / Garcia-Nafria, J. / Greger, I.G. | ||||||
![]() | ![]() タイトル: Architecture of the heteromeric GluA1/2 AMPA receptor in complex with the auxiliary subunit TARP γ8. 著者: Beatriz Herguedas / Jake F Watson / Hinze Ho / Ondrej Cais / Javier García-Nafría / Ingo H Greger / ![]() 要旨: AMPA-type glutamate receptors (AMPARs) mediate excitatory neurotransmission and are central regulators of synaptic plasticity, a molecular mechanism underlying learning and memory. Although AMPARs ...AMPA-type glutamate receptors (AMPARs) mediate excitatory neurotransmission and are central regulators of synaptic plasticity, a molecular mechanism underlying learning and memory. Although AMPARs act predominantly as heteromers, structural studies have focused on homomeric assemblies. Here, we present a cryo-electron microscopy structure of the heteromeric GluA1/2 receptor associated with two transmembrane AMPAR regulatory protein (TARP) γ8 auxiliary subunits, the principal AMPAR complex at hippocampal synapses. Within the receptor, the core subunits arrange to give the GluA2 subunit dominant control of gating. This structure reveals the geometry of the Q/R site that controls calcium flux, suggests association of TARP-stabilized lipids, and demonstrates that the extracellular loop of γ8 modulates gating by selectively interacting with the GluA2 ligand-binding domain. Collectively, this structure provides a blueprint for deciphering the signal transduction mechanisms of synaptic AMPARs. | ||||||
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構造の表示
ムービー |
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構造ビューア | 分子: ![]() ![]() |
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PDBx/mmCIF形式 | ![]() | 407.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 292.3 KB | 表示 | ![]() |
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その他 | ![]() |
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-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 102661.930 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #2: タンパク質 | 分子量: 96247.055 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #3: タンパク質 | 分子量: 43576.004 Da / 分子数: 2 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() #4: 化合物 | ChemComp-E2Q / #5: 化合物 | ChemComp-OLC / ( Has protein modification | Y | |
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-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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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 |
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試料調製
構成要素 | 名称: GluA1/A2 bound to gamma-8 / タイプ: COMPLEX / Entity ID: #1-#3 / 由来: RECOMBINANT |
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分子量 | 値: 447 kDa/nm / 実験値: NO |
由来(天然) | 生物種: ![]() ![]() |
由来(組換発現) | 生物種: ![]() |
緩衝液 | pH: 8 詳細: 25 mM TRIS, pH 8, 150 mM NaCl and 0.1 % digitonin (w/v) |
試料 | 濃度: 0.4 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 K 詳細: 3uL on grid, 60 sec incubation and 4sec blotting time |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: FEI TITAN KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 105000 X / 最大 デフォーカス(公称値): -900 nm / 最小 デフォーカス(公称値): -200 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 最高温度: 100 K / 最低温度: 100 K |
撮影 | 平均露光時間: 14 sec. / 電子線照射量: 32 e/Å2 / 検出モード: COUNTING フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 撮影したグリッド数: 3 / 実像数: 5005 |
電子光学装置 | エネルギーフィルタースリット幅: 20 eV / 位相板: VOLTA PHASE PLATE |
画像スキャン | 横: 3838 / 縦: 3710 / 動画フレーム数/画像: 35 |
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解析
ソフトウェア | 名称: REFMAC / バージョン: 5.8.0236 / 分類: 精密化 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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EMソフトウェア |
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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: 4.4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 114730 / アルゴリズム: FOURIER SPACE / 対称性のタイプ: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: RECIPROCAL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 |
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精密化 | 解像度: 4.4→4.4 Å / Cor.coef. Fo:Fc: 0.636 / ESU R: 3.041 立体化学のターゲット値: MAXIMUM LIKELIHOOD WITH PHASES 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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溶媒の処理 | イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 100.508 Å2
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精密化ステップ | サイクル: 1 / 合計: 13792 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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