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データを開く
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基本情報
| 登録情報 | データベース: PDB / ID: 9d67 | |||||||||
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| タイトル | Human excitatory amino acid transporter 3 (EAAT3) with bound D-Aspartate in an intermediate outward facing state | |||||||||
要素 | Excitatory amino acid transporter 3 | |||||||||
キーワード | TRANSPORT PROTEIN / human EAAT3 / D-Asp / iOFS | |||||||||
| 機能・相同性 | 機能・相同性情報D-aspartate transmembrane transport / regulation of protein targeting to membrane / D-aspartate transmembrane transporter activity / Defective SLC1A1 is implicated in schizophrenia 18 (SCZD18) and dicarboxylic aminoaciduria (DCBXA) / distal dendrite / cysteine transport / cysteine transmembrane transporter activity / neurotransmitter receptor transport to plasma membrane / high-affinity L-glutamate transmembrane transporter activity / glutamate:sodium symporter activity ...D-aspartate transmembrane transport / regulation of protein targeting to membrane / D-aspartate transmembrane transporter activity / Defective SLC1A1 is implicated in schizophrenia 18 (SCZD18) and dicarboxylic aminoaciduria (DCBXA) / distal dendrite / cysteine transport / cysteine transmembrane transporter activity / neurotransmitter receptor transport to plasma membrane / high-affinity L-glutamate transmembrane transporter activity / glutamate:sodium symporter activity / L-glutamate import / response to decreased oxygen levels / cellular response to mercury ion / : / L-glutamate transmembrane transporter activity / retina layer formation / glutathione biosynthetic process / L-glutamate transmembrane transport / L-aspartate transmembrane transport / D-aspartate import across plasma membrane / cellular response to ammonium ion / righting reflex / zinc ion transmembrane transport / L-aspartate transmembrane transporter activity / cellular response to bisphenol A / intracellular glutamate homeostasis / L-aspartate import across plasma membrane / Glutamate Neurotransmitter Release Cycle / grooming behavior / L-glutamate import across plasma membrane / proximal dendrite / monoatomic anion channel activity / transepithelial transport / apical dendrite / intracellular zinc ion homeostasis / blood vessel morphogenesis / cellular response to cocaine / G protein-coupled dopamine receptor signaling pathway / chloride transmembrane transporter activity / motor neuron apoptotic process / response to anesthetic / glutamate receptor signaling pathway / superoxide metabolic process / response to morphine / heart contraction / neurotransmitter transport / maintenance of blood-brain barrier / perisynaptic space / adult behavior / dopamine metabolic process / motor behavior / asymmetric synapse / conditioned place preference / glial cell projection / response to axon injury / behavioral fear response / positive regulation of heart rate / postsynaptic modulation of chemical synaptic transmission / transport across blood-brain barrier / synaptic cleft / monoatomic ion transport / neurogenesis / axon terminus / chloride transmembrane transport / dendritic shaft / response to amphetamine / cell periphery / locomotory behavior / synapse organization / brain development / Schaffer collateral - CA1 synapse / memory / recycling endosome membrane / cytokine-mediated signaling pathway / long-term synaptic potentiation / late endosome membrane / presynapse / cellular response to oxidative stress / early endosome membrane / gene expression / dendritic spine / chemical synaptic transmission / negative regulation of neuron apoptotic process / perikaryon / apical plasma membrane / membrane raft / response to xenobiotic stimulus / axon / neuronal cell body / dendrite / cell surface / extracellular exosome / metal ion binding / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能 | |||||||||
| 生物種 | Homo sapiens (ヒト) | |||||||||
| 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: 2.87 Å | |||||||||
データ登録者 | Qiu, B. / Boudker, O. | |||||||||
| 資金援助 | 米国, 2件
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引用 | ジャーナル: bioRxiv / 年: 2024タイトル: Structural basis of the excitatory amino acid transporter 3 substrate recognition. 著者: Biao Qiu / Olga Boudker / ![]() 要旨: Excitatory amino acid transporters (EAATs) reside on cell surfaces and uptake substrates, including L-glutamate, L-aspartate, and D-aspartate, using ion gradients. Among five EAATs, EAAT3 is the only ...Excitatory amino acid transporters (EAATs) reside on cell surfaces and uptake substrates, including L-glutamate, L-aspartate, and D-aspartate, using ion gradients. Among five EAATs, EAAT3 is the only isoform that can efficiently transport L-cysteine, a substrate for glutathione synthesis. Recent work suggests that EAAT3 also transports the oncometabolite R-2-hydroxyglutarate (R-2HG). Here, we examined the structural basis of substrate promiscuity by determining the cryo-EM structures of EAAT3 bound to different substrates. We found that L-cysteine binds to EAAT3 in thiolate form, and EAAT3 recognizes different substrates by fine-tuning local conformations of the coordinating residues. However, using purified human EAAT3, we could not observe R-2HG binding or transport. Imaging of EAAT3 bound to L-cysteine revealed several conformational states, including an outward-facing state with a semi-open gate and a disrupted sodium-binding site. These structures illustrate that the full gate closure, coupled with the binding of the last sodium ion, occurs after substrate binding. Furthermore, we observed that different substrates affect how the transporter distributes between a fully outward-facing conformation and intermediate occluded states on a path to the inward-facing conformation, suggesting that translocation rates are substrate-dependent. | |||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 9d67.cif.gz | 237.5 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb9d67.ent.gz | 189 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9d67.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
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/d6/9d67 ftp://data.pdbj.org/pub/pdb/validation_reports/d6/9d67 | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 46588MC ![]() 9d66C ![]() 9d68C ![]() 9d69C ![]() 9d6aC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 ( |
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| 類似構造データ | 類似検索 - 機能・相同性 F&H 検索 |
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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: 57120.863 Da / 分子数: 3 変異: C9A, C100A, C158A, N178T, N195T, C219A, C256W, K269C, W441C. 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: SLC1A1, EAAC1, EAAT3 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P43005#2: 化合物 | #3: 化合物 | ChemComp-NA / #4: 化合物 | #5: 水 | ChemComp-HOH / | 研究の焦点であるリガンドがあるか | Y | Has protein modification | N | |
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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: EAAT3 with D-Asp bound at iOFS* / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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| 分子量 | 実験値: NO |
| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) |
| 緩衝液 | pH: 7.4 詳細: 20 mM Hepes-Tris pH 7.4, 200 mM NaCl and 0.01% GDN, 10 mM D-Aspartate |
| 試料 | 濃度: 5 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: GOLD / 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 | 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 277 K |
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電子顕微鏡撮影
| 顕微鏡 | モデル: FEI/PHILIPS CM300FEG/T |
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| 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 / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 500 nm |
| 撮影 | 電子線照射量: 52.19 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
| 電子光学装置 | エネルギーフィルタースリット幅: 20 eV |
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解析
| EMソフトウェア |
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| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
| 粒子像の選択 | 選択した粒子像数: 3346010 | ||||||||||||||||||||||||||||||||||||
| 対称性 | 点対称性: C3 (3回回転対称) | ||||||||||||||||||||||||||||||||||||
| 3次元再構成 | 解像度: 2.87 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 391308 / クラス平均像の数: 1 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||
| 原子モデル構築 | B value: 65.75 / プロトコル: OTHER / 空間: REAL | ||||||||||||||||||||||||||||||||||||
| 原子モデル構築 | PDB-ID: 8CTC Accession code: 8CTC / Source name: PDB / タイプ: experimental model |
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万見について




Homo sapiens (ヒト)
米国, 2件
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FIELD EMISSION GUN
