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-基本情報
登録情報 | データベース: EMDB / ID: EMD-25813 | |||||||||
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タイトル | Structure of Xenopus KCNQ1-CaM in complex with ML277 | |||||||||
マップデータ | ||||||||||
試料 |
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キーワード | Activator / ion channel (イオンチャネル) / TRANSPORT PROTEIN-ACTIVATOR complex | |||||||||
機能・相同性 | 機能・相同性情報 regulation of gastric acid secretion / membrane repolarization / delayed rectifier potassium channel activity / outward rectifier potassium channel activity / CAM型光合成 / intestinal absorption / Cam-PDE 1 activation / Sodium/Calcium exchangers / Calmodulin induced events / Reduction of cytosolic Ca++ levels ...regulation of gastric acid secretion / membrane repolarization / delayed rectifier potassium channel activity / outward rectifier potassium channel activity / CAM型光合成 / intestinal absorption / Cam-PDE 1 activation / Sodium/Calcium exchangers / Calmodulin induced events / Reduction of cytosolic Ca++ levels / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Activation of Ca-permeable Kainate Receptor / Loss of phosphorylation of MECP2 at T308 / CREB1 phosphorylation through the activation of Adenylate Cyclase / monoatomic ion channel complex / PKA activation / negative regulation of high voltage-gated calcium channel activity / CaMK IV-mediated phosphorylation of CREB / Glycogen breakdown (glycogenolysis) / organelle localization by membrane tethering / negative regulation of calcium ion export across plasma membrane / Activation of RAC1 downstream of NMDARs / mitochondrion-endoplasmic reticulum membrane tethering / CLEC7A (Dectin-1) induces NFAT activation / regulation of cardiac muscle cell action potential / autophagosome membrane docking / renal absorption / positive regulation of ryanodine-sensitive calcium-release channel activity / regulation of cell communication by electrical coupling involved in cardiac conduction / Negative regulation of NMDA receptor-mediated neuronal transmission / negative regulation of peptidyl-threonine phosphorylation / Synthesis of IP3 and IP4 in the cytosol / Unblocking of NMDA receptors, glutamate binding and activation / voltage-gated potassium channel activity / Phase 0 - rapid depolarisation / protein phosphatase activator activity / RHO GTPases activate PAKs / positive regulation of cyclic-nucleotide phosphodiesterase activity / positive regulation of phosphoprotein phosphatase activity / Ion transport by P-type ATPases / inner ear development / 長期増強 / Uptake and function of anthrax toxins / Regulation of MECP2 expression and activity / Calcineurin activates NFAT / catalytic complex / DARPP-32 events / detection of calcium ion / negative regulation of ryanodine-sensitive calcium-release channel activity / Smooth Muscle Contraction / RHO GTPases activate IQGAPs / regulation of cardiac muscle contraction / calcium channel inhibitor activity / cellular response to interferon-beta / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / Protein methylation / eNOS activation / Activation of AMPK downstream of NMDARs / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / regulation of calcium-mediated signaling / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / positive regulation of protein dephosphorylation / voltage-gated potassium channel complex / Ion homeostasis / regulation of ryanodine-sensitive calcium-release channel activity / titin binding / positive regulation of protein autophosphorylation / sperm midpiece / calcium channel complex / phosphatidylinositol-4,5-bisphosphate binding / substantia nigra development / adenylate cyclase activator activity / Ras activation upon Ca2+ influx through NMDA receptor / regulation of heart rate / sarcomere / protein serine/threonine kinase activator activity / FCERI mediated Ca+2 mobilization / FCGR3A-mediated IL10 synthesis / VEGFR2 mediated vascular permeability / positive regulation of peptidyl-threonine phosphorylation / regulation of cytokinesis / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / VEGFR2 mediated cell proliferation / Translocation of SLC2A4 (GLUT4) to the plasma membrane / RAF activation / positive regulation of receptor signaling pathway via JAK-STAT / cytoplasmic vesicle membrane / Transcriptional activation of mitochondrial biogenesis / positive regulation of protein serine/threonine kinase activity / spindle microtubule / Stimuli-sensing channels / cellular response to type II interferon / 紡錘体 / response to calcium ion / RAS processing / Signaling by RAF1 mutants / Signaling by moderate kinase activity BRAF mutants / Paradoxical activation of RAF signaling by kinase inactive BRAF / Signaling downstream of RAS mutants / Inactivation, recovery and regulation of the phototransduction cascade 類似検索 - 分子機能 | |||||||||
生物種 | Xenopus laevis (アフリカツメガエル) / 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: 3.9 Å | |||||||||
データ登録者 | Willegems K / Kyriakis E | |||||||||
資金援助 | 1件
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引用 | ジャーナル: Nat Commun / 年: 2022 タイトル: Structural and electrophysiological basis for the modulation of KCNQ1 channel currents by ML277. 著者: Katrien Willegems / Jodene Eldstrom / Efthimios Kyriakis / Fariba Ataei / Harutyun Sahakyan / Ying Dou / Sophia Russo / Filip Van Petegem / David Fedida / 要旨: The KCNQ1 ion channel plays critical physiological roles in electrical excitability and K recycling in organs including the heart, brain, and gut. Loss of function is relatively common and can cause ...The KCNQ1 ion channel plays critical physiological roles in electrical excitability and K recycling in organs including the heart, brain, and gut. Loss of function is relatively common and can cause sudden arrhythmic death, sudden infant death, epilepsy and deafness. Here, we report cryogenic electron microscopic (cryo-EM) structures of Xenopus KCNQ1 bound to Ca/Calmodulin, with and without the KCNQ1 channel activator, ML277. A single binding site for ML277 was identified, localized to a pocket lined by the S4-S5 linker, S5 and S6 helices of two separate subunits. Several pocket residues are not conserved in other KCNQ isoforms, explaining specificity. MD simulations and point mutations support this binding location for ML277 in open and closed channels and reveal that prevention of inactivation is an important component of the activator effect. Our work provides direction for therapeutic intervention targeting KCNQ1 loss of function pathologies including long QT interval syndrome and seizures. | |||||||||
履歴 |
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-構造の表示
添付画像 |
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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_25813.map.gz | 167.8 MB | EMDBマップデータ形式 | |
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ヘッダ (付随情報) | emd-25813-v30.xml emd-25813.xml | 15.3 KB 15.3 KB | 表示 表示 | EMDBヘッダ |
FSC (解像度算出) | emd_25813_fsc.xml | 16.5 KB | 表示 | FSCデータファイル |
画像 | emd_25813.png | 97.8 KB | ||
Filedesc metadata | emd-25813.cif.gz | 6.3 KB | ||
アーカイブディレクトリ | http://ftp.pdbj.org/pub/emdb/structures/EMD-25813 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-25813 | HTTPS FTP |
-関連構造データ
関連構造データ | 7tciMC 7tcpC C: 同じ文献を引用 (文献) M: このマップから作成された原子モデル |
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類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-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 |
-マップ
ファイル | ダウンロード / ファイル: emd_25813.map.gz / 形式: CCP4 / 大きさ: 178 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||
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ボクセルのサイズ | X=Y=Z: 0.835 Å | ||||||||||||||||||||
密度 |
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対称性 | 空間群: 1 | ||||||||||||||||||||
詳細 | EMDB XML:
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-添付データ
-試料の構成要素
-全体 : Potassium voltage-gated channel subfamily KQT member 1 in complex...
全体 | 名称: Potassium voltage-gated channel subfamily KQT member 1 in complex with calmodulin and ML277 |
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要素 |
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-超分子 #1: Potassium voltage-gated channel subfamily KQT member 1 in complex...
超分子 | 名称: Potassium voltage-gated channel subfamily KQT member 1 in complex with calmodulin and ML277 タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#2 |
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由来(天然) | 生物種: Xenopus laevis (アフリカツメガエル) |
分子量 | 理論値: 317.56 KDa |
-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: Xenopus laevis (アフリカツメガエル) |
分子量 | 理論値: 62.663398 KDa |
組換発現 | 生物種: Homo sapiens (ヒト) |
配列 | 文字列: MATDPPRPTI NLDPRVSIYS GRRPLLSRTN IQGRVYNFLE RPTGWKCFVY HFTVFLIVLI CLIFSVLSTI QQYNNLATET LFWMEIVLV VFFGAEYVVR LWSAGCRSKY VGVWGRLRFA RKPISVIDLI VVVASVIVLC VGSNGQVFAT SAIRGIRFLQ I LRMLHVDR ...文字列: MATDPPRPTI NLDPRVSIYS GRRPLLSRTN IQGRVYNFLE RPTGWKCFVY HFTVFLIVLI CLIFSVLSTI QQYNNLATET LFWMEIVLV VFFGAEYVVR LWSAGCRSKY VGVWGRLRFA RKPISVIDLI VVVASVIVLC VGSNGQVFAT SAIRGIRFLQ I LRMLHVDR QGGTWRLLGS VVFIHRQELI TTLYIGFLGL IFSSYFVYLA EKDAIDSSGE YQFGSYADAL WWGVVTVTTI GY GDKVPQT WIGKTIASCF SVFAISFFAL PAGILGSGFA LKVQQKQRQK HFNRQIPAAA SLIQTAWRCY AAENPDSATW KIY IRKQSR NHHLMSPSPK PKKSAMVKKK KIRTERDEGS TDKMLNIPHI TYDHVADDRK NDGYSVESYE NTVRKPFGFL DPST GPFIR TSSFTDDLDM EGDTLLTPIT HISELKEHHR AAIKVIRRMQ YFVAKKKFQQ ARKPYDVRDV IEQYSQGHLN LMVRI KELQ RRLDQSLGKP SLFLSVSDKV KDKGINTIGS RLNRVEDKVT QMDHKLNLIT DMLHHLLTNQ QSNS 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: (2R)-N-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]-1-(4-methylbenzene-...
分子 | 名称: (2R)-N-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]-1-(4-methylbenzene-1-sulfonyl)piperidine-2-carboxamide タイプ: ligand / ID: 3 / コピー数: 4 / 式: I0S |
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分子量 | 理論値: 471.592 Da |
Chemical component information | ChemComp-I0S: |
-分子 #4: CALCIUM ION
分子 | 名称: CALCIUM ION / タイプ: ligand / ID: 4 / コピー数: 12 / 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 |
-試料調製
濃度 | 2 mg/mL | |||||||||||||||||||||
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緩衝液 | pH: 7.2 構成要素:
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グリッド | モデル: Quantifoil R1.2/1.3 / 材質: COPPER / メッシュ: 400 / 前処理 - タイプ: GLOW DISCHARGE / 前処理 - 時間: 25 sec. / 前処理 - 雰囲気: AIR | |||||||||||||||||||||
凍結 | 凍結剤: ETHANE / チャンバー内湿度: 98 % / チャンバー内温度: 277.15 K / 装置: FEI VITROBOT MARK IV |
-電子顕微鏡法
顕微鏡 | FEI TITAN KRIOS |
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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 FIELDBright-field microscopy / 最大 デフォーカス(公称値): 4.8 µm / 最小 デフォーカス(公称値): 0.53 µm |
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 |
撮影 | フィルム・検出器のモデル: FEI FALCON III (4k x 4k) 検出モード: COUNTING / 撮影したグリッド数: 1 / 実像数: 4400 / 平均電子線量: 50.0 e/Å2 |
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |