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基本情報
登録情報 | データベース: PDB / ID: 9gtb | |||||||||||||||||||||
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タイトル | Cryo-EM structure of Mouse PMCA-NPTN complex captured in E1-Ca state | |||||||||||||||||||||
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![]() | MEMBRANE PROTEIN / P-type Atpase / antiporter / calcium pump | |||||||||||||||||||||
機能・相同性 | ![]() otolith mineralization / regulation of receptor localization to synapse / cerebellar Purkinje cell layer morphogenesis / type 1 fibroblast growth factor receptor binding / inner ear receptor cell differentiation / Reduction of cytosolic Ca++ levels / cGMP metabolic process / cerebellar granule cell differentiation / Ion transport by P-type ATPases / calcium-dependent ATPase activity ...otolith mineralization / regulation of receptor localization to synapse / cerebellar Purkinje cell layer morphogenesis / type 1 fibroblast growth factor receptor binding / inner ear receptor cell differentiation / Reduction of cytosolic Ca++ levels / cGMP metabolic process / cerebellar granule cell differentiation / Ion transport by P-type ATPases / calcium-dependent ATPase activity / excitatory synapse assembly / cerebellar Purkinje cell differentiation / positive regulation of fibroblast growth factor receptor signaling pathway / photoreceptor ribbon synapse / positive regulation of long-term neuronal synaptic plasticity / P-type Ca2+ transporter / detection of mechanical stimulus involved in sensory perception of sound / P-type calcium transporter activity / serotonin metabolic process / Ion homeostasis / positive regulation of calcium ion transport / locomotion / auditory receptor cell stereocilium organization / dendritic spine membrane / negative regulation of cytokine production / inner ear morphogenesis / neuromuscular process controlling balance / regulation of cell size / homophilic cell adhesion via plasma membrane adhesion molecules / inner ear development / cochlea development / immunological synapse / regulation of cytosolic calcium ion concentration / cell adhesion molecule binding / lactation / cerebellum development / PDZ domain binding / locomotory behavior / establishment of localization in cell / sensory perception of sound / synapse organization / positive regulation of neuron projection development / modulation of chemical synaptic transmission / neuron cellular homeostasis / regulation of synaptic plasticity / long-term synaptic potentiation / intracellular calcium ion homeostasis / positive regulation of protein phosphorylation / cell morphogenesis / neuron differentiation / calcium ion transport / positive regulation of cytosolic calcium ion concentration / presynaptic membrane / basolateral plasma membrane / calmodulin binding / neuron projection / postsynaptic density / cilium / apical plasma membrane / neuronal cell body / dendrite / calcium ion binding / glutamatergic synapse / endoplasmic reticulum / ATP hydrolysis activity / ATP binding / plasma membrane / cytoplasm 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: 3.5 Å | |||||||||||||||||||||
![]() | Vinayagam, D. / Raunser, S. / Sistel, O. / Shulte, U. / Constantin, C.E. / Prubaum, D. / Zolles, G. / Fakler, B. | |||||||||||||||||||||
資金援助 | ![]()
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![]() | ジャーナル: Nature / 年: 2025 タイトル: Molecular mechanism of ultrafast transport by plasma membrane Ca-ATPases. 著者: Deivanayagabarathy Vinayagam / Oleg Sitsel / Uwe Schulte / Cristina E Constantin / Wout Oosterheert / Daniel Prumbaum / Gerd Zolles / Bernd Fakler / Stefan Raunser / ![]() ![]() 要旨: Tight control of intracellular Ca levels is fundamental as they are used to control numerous signal transduction pathways. Plasma membrane Ca-ATPases (PMCAs) have a crucial role in this process by ...Tight control of intracellular Ca levels is fundamental as they are used to control numerous signal transduction pathways. Plasma membrane Ca-ATPases (PMCAs) have a crucial role in this process by extruding Ca against a steep concentration gradient from the cytosol to the extracellular space. Although new details of PMCA biology are constantly being uncovered, the structural basis of the most distinguishing features of these pumps, namely, transport rates in the kilohertz range and regulation of activity by the plasma membrane phospholipid PtdIns(4,5)P, has so far remained elusive. Here we present the structures of mouse PMCA2 in the presence and absence of its accessory subunit neuroplastin in eight different stages of its transport cycle. Combined with whole-cell recordings that accurately track PMCA-mediated Ca extrusion in intact cells, these structures enable us to establish the first comprehensive transport model for a PMCA, reveal the role of disease-causing mutations and uncover the structural underpinnings of regulatory PMCA-phospholipid interaction. The transport cycle-dependent dynamics of PtdIns(4,5)P are fundamental for its role as a 'latch' promoting the fast release of Ca and opening a passageway for counter-ions. These actions are required for maintaining the ultra-fast transport cycle. Moreover, we identify the PtdIns(4,5)P-binding site as an unanticipated target for drug-mediated manipulation of intracellular Ca levels. Our work provides detailed structural insights into the uniquely fast operation of native PMCA-type Ca pumps and its control by membrane lipids and drugs. | |||||||||||||||||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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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 | ![]() | 244.5 KB | 表示 | ![]() |
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PDB形式 | ![]() | 186.5 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1.3 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.3 MB | 表示 | |
XML形式データ | ![]() | 47.5 KB | 表示 | |
CIF形式データ | ![]() | 70 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-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: 134647.141 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() | ||||
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#2: タンパク質 | 分子量: 46440.059 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() ![]() | ||||
#3: 化合物 | ChemComp-CA / | ||||
#4: 化合物 | ChemComp-KXP / ( | ||||
#5: 糖 | ChemComp-NAG / 研究の焦点であるリガンドがあるか | Y | Has protein modification | Y | |
-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: PMCA-NPTN complex / タイプ: COMPLEX 詳細: prepared as separate cDNAs for transient (co)transfection of tsA201 nptn/basi double KO cells Entity ID: #1-#2 / 由来: RECOMBINANT |
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分子量 | 値: 0.18 MDa / 実験値: NO |
由来(天然) | 生物種: ![]() ![]() |
由来(組換発現) | 生物種: ![]() |
緩衝液 | pH: 7.4 / 詳細: Tris 20mM NaCl 150mM |
試料 | 濃度: 1.5 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: The complex was monodisperse |
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: 95 % / 凍結前の試料温度: 277 K |
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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: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 55000 X / 倍率(補正後): 105000 X / 最大 デフォーカス(公称値): 2500 nm / 最小 デフォーカス(公称値): 1100 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm / アライメント法: ZEMLIN TABLEAU |
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: 113 K / 最低温度: 93 K |
撮影 | 平均露光時間: 3 sec. / 電子線照射量: 67.63 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 実像数: 29014 |
電子光学装置 | エネルギーフィルター名称: GIF Bioquantum / 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 | ||||||||||||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 201573 / 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 | ||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | B value: 146.2 / プロトコル: OTHER / 空間: REAL | ||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 6A69 Accession code: 6A69 / Source name: PDB / タイプ: experimental model | ||||||||||||||||||||||||||||||||||||||||||||||||||
精密化 | 最高解像度: 3.5 Å 立体化学のターゲット値: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS) | ||||||||||||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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