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基本情報
登録情報 | データベース: EMDB / ID: EMD-22024 | |||||||||
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タイトル | hEAAT3-Asymmetric-2o1i-in20mM-Asp | |||||||||
![]() | hEAAT3 asymmetric trimer with 2 outward-facing protomers and 1 inward-facing protomer in 20mM Asp | |||||||||
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機能・相同性 | ![]() 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 / L-glutamate transmembrane transport / glutathione biosynthetic process / D-aspartate import across plasma membrane / L-aspartate transmembrane transport / cellular response to ammonium ion / righting reflex / zinc ion transmembrane transport / cellular response to bisphenol A / L-aspartate transmembrane transporter activity / intracellular glutamate homeostasis / grooming behavior / L-aspartate import across plasma membrane / Glutamate Neurotransmitter Release Cycle / monoatomic anion channel activity / L-glutamate import across plasma membrane / proximal dendrite / transepithelial transport / apical dendrite / intracellular zinc ion homeostasis / blood vessel morphogenesis / cellular response to cocaine / chloride transmembrane transporter activity / motor neuron apoptotic process / G protein-coupled dopamine receptor signaling pathway / response to anesthetic / glutamate receptor signaling pathway / response to morphine / superoxide metabolic process / neurotransmitter transport / heart contraction / maintenance of blood-brain barrier / perisynaptic space / dopamine metabolic process / adult behavior / motor behavior / asymmetric synapse / conditioned place preference / glial cell projection / synaptic cleft / behavioral fear response / postsynaptic modulation of chemical synaptic transmission / response to axon injury / positive regulation of heart rate / transport across blood-brain barrier / monoatomic ion transport / neurogenesis / axon terminus / chloride transmembrane transport / response to amphetamine / dendritic shaft / cell periphery / locomotory behavior / synapse organization / brain development / Schaffer collateral - CA1 synapse / memory / long-term synaptic potentiation / recycling endosome membrane / cytokine-mediated signaling pathway / late endosome membrane / presynapse / cellular response to oxidative stress / early endosome membrane / perikaryon / gene expression / chemical synaptic transmission / dendritic spine / negative regulation of neuron apoptotic process / 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 | ![]() | |||||||||
手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 3.71 Å | |||||||||
![]() | Qiu B / Matthies D / Boudker O | |||||||||
資金援助 | ![]()
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![]() | ![]() 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 |
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構造ビューア | EMマップ: ![]() ![]() ![]() |
添付画像 |
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FSC (解像度算出) | ![]() | 7.9 KB | 表示 | ![]() |
画像 | ![]() | 40.5 KB | ||
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文書・要旨 | ![]() | 389.6 KB | 表示 | ![]() |
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文書・詳細版 | ![]() | 389.2 KB | 表示 | |
XML形式データ | ![]() | 10 KB | 表示 | |
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-関連構造データ
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リンク
EMDBのページ | ![]() ![]() |
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「今月の分子」の関連する項目 |
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マップ
ファイル | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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注釈 | hEAAT3 asymmetric trimer with 2 outward-facing protomers and 1 inward-facing protomer in 20mM Asp | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
投影像・断面図 | 画像のコントロール
画像は Spider により作成 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ボクセルのサイズ | X=Y=Z: 1.096 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
詳細 | EMDB XML:
CCP4マップ ヘッダ情報:
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-添付データ
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試料の構成要素
-全体 : human Excitatory amino acid transporter 3 in 20mM Asp
全体 | 名称: human Excitatory amino acid transporter 3 in 20mM Asp |
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要素 |
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-超分子 #1: human Excitatory amino acid transporter 3 in 20mM Asp
超分子 | 名称: human Excitatory amino acid transporter 3 in 20mM Asp タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all |
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由来(天然) | 生物種: ![]() |
組換発現 | 生物種: ![]() |
-分子 #1: human Excitatory amino acid transporter 3
分子 | 名称: human Excitatory amino acid transporter 3 / タイプ: protein_or_peptide / ID: 1 詳細: The Glycine and Proline at the N terminal are the residues left after PreScission Protease treatment 光学異性体: LEVO |
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由来(天然) | 生物種: ![]() |
組換発現 | 生物種: ![]() |
配列 | 文字列: GPMGKPARKG CEWKRFLKNN WVLLSTVAAV VLGITTGVLV REHSNLSTLE KFYFAFPGEI LMRMLKLIIL PL IISSMIT GVAALDSNVS GKIGLRAVVY YFCTTLIAVI LGIVLVVSIK PGVTQKVGEI ARTGSTPEVS TVD AMLDLI RNMFPENLVQ ACFQQYKTKR ...文字列: GPMGKPARKG CEWKRFLKNN WVLLSTVAAV VLGITTGVLV REHSNLSTLE KFYFAFPGEI LMRMLKLIIL PL IISSMIT GVAALDSNVS GKIGLRAVVY YFCTTLIAVI LGIVLVVSIK PGVTQKVGEI ARTGSTPEVS TVD AMLDLI RNMFPENLVQ ACFQQYKTKR EEVKPPSDPE MNMTEESFTA VMTTAISKNK TKEYKIVGMY SDGI NVLGL IVFCLVFGLV IGKMGEKGQI LVDFFNALSD ATMKIVQIIM CYMPLGILFL IAGKIIEVED WEIFR KLGL YMATVLTGLA IHSIVILPLI YFIVVRKNPF RFAMGMAQAL LTALMISSSS ATLPVTFRCA EENNQV DKR ITRFVLPVGA TINMDGTALY EAVAAVFIAQ LNDLDLGIGQ IITISITATS ASIGAAGVPQ AGLVTMV IV LSAVGLPAED VTLIIAVDWL LDRFRTMVNV LGDAFGTGIV EKLSKKELEQ MDVSSEVNIV NPFALEST I LDNEDSDTKK SYVNGGFAVD KSDTISFTQT SQF |
-実験情報
-構造解析
手法 | クライオ電子顕微鏡法 |
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![]() | 単粒子再構成法 |
試料の集合状態 | particle |
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試料調製
濃度 | 5 mg/mL | ||||||||||||||||||
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緩衝液 | pH: 8 構成要素:
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グリッド | モデル: Quantifoil R1.2/1.3 / 材質: GOLD / メッシュ: 300 / 支持フィルム - 材質: CARBON / 支持フィルム - トポロジー: HOLEY / 前処理 - タイプ: GLOW DISCHARGE / 前処理 - 雰囲気: AIR | ||||||||||||||||||
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277 K / 装置: FEI VITROBOT MARK IV |
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電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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撮影 | フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 検出モード: COUNTING / 平均露光時間: 10.0 sec. / 平均電子線量: 67.6 e/Å2 |
電子線 | 加速電圧: 300 kV / 電子線源: ![]() |
電子光学系 | C2レンズ絞り径: 100.0 µm / 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / Cs: 0.001 mm / 最大 デフォーカス(公称値): 2.0 µm / 最小 デフォーカス(公称値): 1.0 µm / 倍率(公称値): 105000 |
試料ステージ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER ホルダー冷却材: NITROGEN |
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |