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データを開く
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基本情報
| 登録情報 | ![]() | |||||||||
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| タイトル | structure of human KCNQ1-KCNE1-CaM complex | |||||||||
マップデータ | ||||||||||
試料 |
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キーワード | Ion channels / MEMBRANE PROTEIN | |||||||||
| 機能・相同性 | 機能・相同性情報vestibular nucleus development / negative regulation of protein targeting to membrane / secretory granule organization / gastrin-induced gastric acid secretion / corticosterone secretion / voltage-gated potassium channel activity involved in atrial cardiac muscle cell action potential repolarization / basolateral part of cell / lumenal side of membrane / negative regulation of voltage-gated potassium channel activity / rhythmic behavior ...vestibular nucleus development / negative regulation of protein targeting to membrane / secretory granule organization / gastrin-induced gastric acid secretion / corticosterone secretion / voltage-gated potassium channel activity involved in atrial cardiac muscle cell action potential repolarization / basolateral part of cell / lumenal side of membrane / negative regulation of voltage-gated potassium channel activity / rhythmic behavior / stomach development / regulation of gastric acid secretion / voltage-gated potassium channel activity involved in cardiac muscle cell action potential repolarization / iodide transport / Phase 3 - rapid repolarisation / regulation of potassium ion transport / membrane repolarization during action potential / membrane repolarization during atrial cardiac muscle cell action potential / telethonin binding / Phase 2 - plateau phase / regulation of atrial cardiac muscle cell membrane repolarization / intracellular chloride ion homeostasis / membrane repolarization during ventricular cardiac muscle cell action potential / negative regulation of delayed rectifier potassium channel activity / membrane repolarization during cardiac muscle cell action potential / potassium ion export across plasma membrane / renal sodium ion absorption / voltage-gated potassium channel activity involved in ventricular cardiac muscle cell action potential repolarization / atrial cardiac muscle cell action potential / regulation of membrane repolarization / auditory receptor cell development / protein phosphatase 1 binding / membrane repolarization / detection of mechanical stimulus involved in sensory perception of sound / delayed rectifier potassium channel activity / ventricular cardiac muscle cell action potential / potassium ion homeostasis / regulation of ventricular cardiac muscle cell membrane repolarization / Voltage gated Potassium channels / positive regulation of potassium ion transmembrane transport / cardiac muscle cell action potential involved in contraction / non-motile cilium assembly / cardiac muscle cell contraction / outward rectifier potassium channel activity / regulation of potassium ion transmembrane transport / epithelial cell maturation / intestinal absorption / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / Calmodulin induced events / Reduction of cytosolic Ca++ levels / inner ear morphogenesis / Activation of Ca-permeable Kainate Receptor / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Loss of phosphorylation of MECP2 at T308 / CREB1 phosphorylation through the activation of Adenylate Cyclase / negative regulation of high voltage-gated calcium channel activity / PKA activation / CaMK IV-mediated phosphorylation of CREB / adrenergic receptor signaling pathway / Glycogen breakdown (glycogenolysis) / CLEC7A (Dectin-1) induces NFAT activation / Activation of RAC1 downstream of NMDARs / negative regulation of ryanodine-sensitive calcium-release channel activity / organelle localization by membrane tethering / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / renal absorption / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / ciliary base / presynaptic endocytosis / protein kinase A catalytic subunit binding / protein kinase A regulatory subunit binding / regulation of heart contraction / Synthesis of IP3 and IP4 in the cytosol / regulation of cell communication by electrical coupling involved in cardiac conduction / potassium ion import across plasma membrane / Phase 0 - rapid depolarisation / calcineurin-mediated signaling / Negative regulation of NMDA receptor-mediated neuronal transmission / inner ear development / Unblocking of NMDA receptors, glutamate binding and activation / regulation of heart rate by cardiac conduction / RHO GTPases activate PAKs / Ion transport by P-type ATPases / Uptake and function of anthrax toxins / action potential / regulation of ryanodine-sensitive calcium-release channel activity / Long-term potentiation / protein phosphatase activator activity / cochlea development / Calcineurin activates NFAT / voltage-gated potassium channel activity / Regulation of MECP2 expression and activity / monoatomic ion channel complex / social behavior / DARPP-32 events / Smooth Muscle Contraction 類似検索 - 分子機能 | |||||||||
| 生物種 | Homo sapiens (ヒト) | |||||||||
| 手法 | 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度: 2.9 Å | |||||||||
データ登録者 | Hou PP / Zhang J / Wan SY / Cheng XY / Zhong L / Hu B | |||||||||
| 資金援助 | 1件
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引用 | ジャーナル: Cell Res / 年: 2025タイトル: Secondary structure transitions and dual PIP2 binding define cardiac KCNQ1-KCNE1 channel gating. 著者: Ling Zhong / Xiaoqing Lin / Xinyu Cheng / Shuangyan Wan / Yaoguang Hua / Weiwei Nan / Bin Hu / Xiangjun Peng / Zihan Zhou / Qiansen Zhang / Huaiyu Yang / Frank Noé / Zhenzhen Yan / Dexiang ...著者: Ling Zhong / Xiaoqing Lin / Xinyu Cheng / Shuangyan Wan / Yaoguang Hua / Weiwei Nan / Bin Hu / Xiangjun Peng / Zihan Zhou / Qiansen Zhang / Huaiyu Yang / Frank Noé / Zhenzhen Yan / Dexiang Jiang / Hangyu Zhang / Fengjiao Liu / Chenxin Xiao / Zhuo Zhou / Yimin Mou / Haijie Yu / Lijuan Ma / Chen Huang / Vincent Kam Wai Wong / Sookja Kim Chung / Bing Shen / Zhi-Hong Jiang / Erwin Neher / Wandi Zhu / Jin Zhang / Panpan Hou / ![]() 要旨: The KCNQ1 + KCNE1 potassium channel complex produces the slow delayed rectifier current (I) critical for cardiac repolarization. Loss-of-function mutations in KCNQ1 and KCNE1 cause long QT ...The KCNQ1 + KCNE1 potassium channel complex produces the slow delayed rectifier current (I) critical for cardiac repolarization. Loss-of-function mutations in KCNQ1 and KCNE1 cause long QT syndrome (LQTS) types 1 and 5 (LQT1/LQT5), accounting for over one-third of clinical LQTS cases. Despite prior structural work on KCNQ1 and KCNQ1 + KCNE3, the structural basis of KCNQ1 + KCNE1 remains unresolved. Using cryo-electron microscopy and electrophysiology, we determined high-resolution (2.5-3.4 Å) structures of human KCNQ1, and KCNQ1 + KCNE1 in both closed and open states. KCNE1 occupies a pivotal position at the interface of three KCNQ1 subunits, inducing six helix-to-loop transitions in KCNQ1 transmembrane segments. Three of them occur at both ends of the S4-S5 linker, maintaining a loop conformation during I gating, while the other three, in S6 and helix A, undergo dynamic helix-loop transitions during I gating. These structural rearrangements: (1) stabilize the closed pore and the conformation of the intermediate state voltage-sensing domain, thereby determining channel gating, ion permeation, and single-channel conductance; (2) enable a dual-PIP2 modulation mechanism, where one PIP2 occupies the canonical site, while the second PIP2 bridges the S4-S5 linker, KCNE1, and the adjacent S6', stabilizing channel opening; (3) create a fenestration capable of binding compounds specific for KCNQ1 + KCNE1 (e.g., AC-1). Together, these findings reveal a previously unrecognized large-scale secondary structural transition during ion channel gating that fine-tunes I function and provides a foundation for developing targeted LQTS therapy. | |||||||||
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構造の表示
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ダウンロードとリンク
-EMDBアーカイブ
| マップデータ | emd_63935.map.gz | 229.9 MB | EMDBマップデータ形式 | |
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| ヘッダ (付随情報) | emd-63935-v30.xml emd-63935.xml | 20.1 KB 20.1 KB | 表示 表示 | EMDBヘッダ |
| 画像 | emd_63935.png | 85.1 KB | ||
| Filedesc metadata | emd-63935.cif.gz | 6.5 KB | ||
| その他 | emd_63935_half_map_1.map.gz emd_63935_half_map_2.map.gz | 226 MB 226 MB | ||
| アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-63935 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-63935 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 9u7fMC ![]() 9uc8C M: このマップから作成された原子モデル 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
| EMDBのページ | EMDB (EBI/PDBe) / EMDataResource |
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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 | ダウンロード / ファイル: emd_63935.map.gz / 形式: CCP4 / 大きさ: 244.1 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| 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: 0.96 Å | ||||||||||||||||||||||||||||||||||||
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| 対称性 | 空間群: 1 | ||||||||||||||||||||||||||||||||||||
| 詳細 | EMDB XML:
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-添付データ
-ハーフマップ: #2
| ファイル | emd_63935_half_map_1.map | ||||||||||||
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| 投影像・断面図 |
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| 密度ヒストグラム |
-ハーフマップ: #1
| ファイル | emd_63935_half_map_2.map | ||||||||||||
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| 投影像・断面図 |
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| 密度ヒストグラム |
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試料の構成要素
-全体 : Structure of human KCNQ1-KCNE1-CaM complex
| 全体 | 名称: Structure of human KCNQ1-KCNE1-CaM complex |
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-超分子 #1: Structure of human KCNQ1-KCNE1-CaM complex
| 超分子 | 名称: Structure of human KCNQ1-KCNE1-CaM complex / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#3 |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
-分子 #1: Potassium voltage-gated channel subfamily KQT member 1
| 分子 | 名称: Potassium voltage-gated channel subfamily KQT member 1 タイプ: protein_or_peptide / ID: 1 / コピー数: 4 / 光学異性体: LEVO |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 分子量 | 理論値: 74.800492 KDa |
| 組換発現 | 生物種: Homo sapiens (ヒト) |
| 配列 | 文字列: MAAASSPPRA ERKRWGWGRL PGARRGSAGL AKKCPFSLEL AEGGPAGGAL YAPIAPGAPG PAPPASPAAP AAPPVASDLG PRPPVSLDP RVSIYSTRRP VLARTHVQGR VYNFLERPTG WKCFVYHFAV FLIVLVCLIF SVLSTIEQYA ALATGTLFWM E IVLVVFFG ...文字列: MAAASSPPRA ERKRWGWGRL PGARRGSAGL AKKCPFSLEL AEGGPAGGAL YAPIAPGAPG PAPPASPAAP AAPPVASDLG PRPPVSLDP RVSIYSTRRP VLARTHVQGR VYNFLERPTG WKCFVYHFAV FLIVLVCLIF SVLSTIEQYA ALATGTLFWM E IVLVVFFG TEYVVRLWSA GCRSKYVGLW GRLRFARKPI SIIDLIVVVA SMVVLCVGSK GQVFATSAIR GIRFLQILRM LH VDRQGGT WRLLGSVVFI HRQELITTLY IGFLGLIFSS YFVYLAEKDA VNESGRVEFG SYADALWWGV VTVTTIGYGD KVP QTWVGK TIASCFSVFA ISFFALPAGI LGSGFALKVQ QKQRQKHFNR QIPAAASLIQ TAWRCYAAEN PDSSTWKIYI RKAP RSHTL LSPSPKPKKS VVVKKKKFKL DKDNGVTPGE KMLTVPHITC DPPEERRLDH FSVDGYDSSV RKSPTLLEVS MPHFM RTNS FAEDLDLEGE TLLTPITHIS QLREHHRATI KVIRRMQYFV AKKKFQQARK PYDVRDVIEQ YSQGHLNLMV RIKELQ RRL DQSIGKPSLF ISVSEKSKDR GSNTIGARLN RVEDKVTQLD QRLALITDML HQLLSLHGGS TPGSGGPPRE GGAHITQ PC GSGGSVDPEL FLPSNTLPTY EQLTVPRRGP DEGS UniProtKB: Potassium voltage-gated channel subfamily KQT member 1 |
-分子 #2: Calmodulin-1
| 分子 | 名称: Calmodulin-1 / タイプ: protein_or_peptide / ID: 2 / コピー数: 4 / 光学異性体: LEVO |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 分子量 | 理論値: 16.852545 KDa |
| 組換発現 | 生物種: Homo sapiens (ヒト) |
| 配列 | 文字列: MADQLTEEQI AEFKEAFSLF DKDGDGTITT KELGTVMRSL GQNPTEAELQ DMINEVDADG NGTIDFPEFL TMMARKMKDT DSEEEIREA FRVFDKDGNG YISAAELRHV MTNLGEKLTD EEVDEMIREA DIDGDGQVNY EEFVQMMTAK UniProtKB: Calmodulin-1 |
-分子 #3: Potassium voltage-gated channel subfamily E member 1
| 分子 | 名称: Potassium voltage-gated channel subfamily E member 1 タイプ: protein_or_peptide / ID: 3 / コピー数: 4 / 光学異性体: LEVO |
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| 由来(天然) | 生物種: Homo sapiens (ヒト) |
| 分子量 | 理論値: 14.690725 KDa |
| 組換発現 | 生物種: Homo sapiens (ヒト) |
| 配列 | 文字列: MILSNTTAVT PFLTKLWQET VQQGGNMSGL ARRSPRSSDG KLEALYVLMV LGFFGFFTLG IMLSYIRSKK LEHSNDPFNV YIESDAWQE KDKAYVQARV LESYRSCYVV ENHLAIEQPN THLPETKPSP UniProtKB: Potassium voltage-gated channel subfamily E member 1 |
-分子 #4: [(2R)-1-octadecanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tr...
| 分子 | 名称: [(2R)-1-octadecanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phospho ryl]oxy-propan-2-yl] (8Z)-icosa-5,8,11,14-tetraenoate タイプ: ligand / ID: 4 / コピー数: 4 / 式: PT5 |
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| 分子量 | 理論値: 1.047088 KDa |
-分子 #5: POTASSIUM ION
| 分子 | 名称: POTASSIUM ION / タイプ: ligand / ID: 5 / コピー数: 4 / 式: K |
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| 分子量 | 理論値: 39.098 Da |
-分子 #6: CALCIUM ION
| 分子 | 名称: CALCIUM ION / タイプ: ligand / ID: 6 / コピー数: 8 / 式: CA |
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| 分子量 | 理論値: 40.078 Da |
-実験情報
-構造解析
| 手法 | クライオ電子顕微鏡法 |
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解析 | 単粒子再構成法 |
| 試料の集合状態 | particle |
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試料調製
| 緩衝液 | pH: 7.5 |
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| 凍結 | 凍結剤: ETHANE |
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電子顕微鏡法
| 顕微鏡 | FEI TECNAI SPIRIT |
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| 撮影 | フィルム・検出器のモデル: FEI FALCON IV (4k x 4k) 平均電子線量: 51.45 e/Å2 |
| 電子線 | 加速電圧: 300 kV / 電子線源: FIELD EMISSION GUN |
| 電子光学系 | 照射モード: FLOOD BEAM / 撮影モード: BRIGHT FIELD / 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 |
| 実験機器 | ![]() モデル: Tecnai Spirit / 画像提供: FEI Company |
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万見について




キーワード
Homo sapiens (ヒト)
データ登録者
引用

























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解析
FIELD EMISSION GUN
