+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6x3e | ||||||
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タイトル | hEAAT3-Asymmetric-1o2i | ||||||
要素 | Excitatory amino acid transporter 3 | ||||||
キーワード | TRANSPORT PROTEIN / Asymmetric / Outward-facing bound / Inward-facing open | ||||||
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 / response to anesthetic / cysteine transmembrane transporter activity / cysteine transport / 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 / response to anesthetic / cysteine transmembrane transporter activity / cysteine transport / high-affinity L-glutamate transmembrane transporter activity / glutamate:sodium symporter activity / L-glutamate import / neurotransmitter receptor transport to plasma membrane / response to decreased oxygen levels / cellular response to mercury ion / Transport of inorganic cations/anions and amino acids/oligopeptides / retina layer formation / L-glutamate transmembrane transport / L-glutamate transmembrane transporter activity / zinc ion transmembrane transport / cellular response to bisphenol A / L-aspartate transmembrane transport / glutathione biosynthetic process / cellular response to ammonium ion / D-aspartate import across plasma membrane / righting reflex / apical dendrite / monoatomic anion channel activity / L-aspartate transmembrane transporter activity / L-aspartate import across plasma membrane / grooming behavior / intracellular glutamate homeostasis / Glutamate Neurotransmitter Release Cycle / proximal dendrite / L-glutamate import across plasma membrane / transepithelial transport / conditioned place preference / intracellular zinc ion homeostasis / cellular response to cocaine / blood vessel morphogenesis / neurotransmitter transport / motor behavior / response to morphine / motor neuron apoptotic process / chloride transmembrane transporter activity / glutamate binding / glutamate receptor signaling pathway / G protein-coupled dopamine receptor signaling pathway / positive regulation of heart rate / postsynaptic modulation of chemical synaptic transmission / maintenance of blood-brain barrier / superoxide metabolic process / heart contraction / adult behavior / perisynaptic space / dopamine metabolic process / cellular response to organic cyclic compound / glial cell projection / behavioral fear response / asymmetric synapse / transport across blood-brain barrier / response to axon injury / synaptic cleft / monoatomic ion transport / axon terminus / chloride transmembrane transport / response to amphetamine / neurogenesis / dendritic shaft / cell periphery / long-term synaptic potentiation / locomotory behavior / synapse organization / brain development / regulation of protein phosphorylation / Schaffer collateral - CA1 synapse / cytokine-mediated signaling pathway / memory / recycling endosome membrane / late endosome membrane / presynapse / cellular response to oxidative stress / gene expression / early endosome membrane / chemical synaptic transmission / perikaryon / negative regulation of neuron apoptotic process / dendritic spine / response to xenobiotic stimulus / membrane raft / apical plasma membrane / axon / neuronal cell body / dendrite / cell surface / endoplasmic reticulum / extracellular exosome / identical protein binding / membrane / metal ion binding / 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: 3.42 Å | ||||||
データ登録者 | Qiu, B. / Matthies, D. / Boudker, O. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Sci Adv / 年: 2021 タイトル: Cryo-EM structures of excitatory amino acid transporter 3 visualize coupled substrate, sodium, and proton binding and transport. 著者: Biao Qiu / Doreen Matthies / Eva Fortea / Zhiheng Yu / Olga Boudker / 要旨: Human excitatory amino acid transporter 3 (hEAAT3) mediates glutamate uptake in neurons, intestine, and kidney. Here, we report cryo-EM structures of hEAAT3 in several functional states where the ...Human excitatory amino acid transporter 3 (hEAAT3) mediates glutamate uptake in neurons, intestine, and kidney. Here, we report cryo-EM structures of hEAAT3 in several functional states where the transporter is empty, bound to coupled sodium ions only, or fully loaded with three sodium ions, a proton, and the substrate aspartate. The structures suggest that hEAAT3 operates by an elevator mechanism involving three functionally independent subunits. When the substrate-binding site is near the cytoplasm, it has a remarkably low affinity for the substrate, perhaps facilitating its release and allowing the rapid transport turnover. The mechanism of the coupled uptake of the sodium ions and the substrate is conserved across evolutionarily distant families and is augmented by coupling to protons in EAATs. The structures further suggest a mechanism by which a conserved glutamate residue mediates proton symport. | ||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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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 | 6x3e.cif.gz | 218.6 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6x3e.ent.gz | 173.5 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6x3e.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 | 6x3e_validation.pdf.gz | 996.8 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 6x3e_full_validation.pdf.gz | 1001 KB | 表示 | |
XML形式データ | 6x3e_validation.xml.gz | 40.6 KB | 表示 | |
CIF形式データ | 6x3e_validation.cif.gz | 63.2 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/x3/6x3e ftp://data.pdbj.org/pub/pdb/validation_reports/x3/6x3e | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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-要素
#1: タンパク質 | 分子量: 57301.168 Da / 分子数: 3 / 由来タイプ: 組換発現 詳細: The Glycine and Proline at the N terminal are the residues left after PreScission Protease treatment 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 | ChemComp-ASP / | #3: 化合物 | 研究の焦点であるリガンドがあるか | 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 |
-試料調製
構成要素 | 名称: Asymmetric hEAAT3 trimer / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT | ||||||||||||||||||||||||||||||
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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: 8 | ||||||||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 6 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: This sample was mono disperse | ||||||||||||||||||||||||||||||
試料支持 | グリッドの材料: COPPER / グリッドのサイズ: 400 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 K / 詳細: blot 3s |
-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: 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): 105000 X / 最大 デフォーカス(公称値): 1500 nm / 最小 デフォーカス(公称値): 500 nm / Cs: 2.7 mm / C2レンズ絞り径: 100 µm |
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: 60 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.18rc1_3769: / 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 | ||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 190599 | ||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.42 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 158349 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||
拘束条件 |
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