+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 5k7l | ||||||||||||
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タイトル | Single particle cryo-EM structure of the voltage-gated K+ channel Eag1 bound to the channel inhibitor calmodulin | ||||||||||||
要素 |
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キーワード | METAL TRANSPORT/CALCIUM BINDING PROTEIN / Voltage-gated potassium channel / calmodulin / Cryoelectron microscopy / Eag1 / METAL TRANSPORT-CALCIUM BINDING PROTEIN complex | ||||||||||||
機能・相同性 | 機能・相同性情報 Voltage gated Potassium channels / potassium channel complex / regulation of presynaptic cytosolic calcium ion concentration / : / establishment of protein localization to mitochondrial membrane / voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / delayed rectifier potassium channel activity / type 3 metabotropic glutamate receptor binding / CaM pathway / Cam-PDE 1 activation ...Voltage gated Potassium channels / potassium channel complex / regulation of presynaptic cytosolic calcium ion concentration / : / establishment of protein localization to mitochondrial membrane / voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / delayed rectifier potassium channel activity / type 3 metabotropic glutamate receptor binding / CaM pathway / Cam-PDE 1 activation / nuclear inner membrane / Sodium/Calcium exchangers / parallel fiber to Purkinje cell synapse / Calmodulin induced events / regulation of synaptic vesicle endocytosis / 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 / PKA activation / negative regulation of high voltage-gated calcium channel activity / regulation of synaptic vesicle exocytosis / CaMK IV-mediated phosphorylation of CREB / Glycogen breakdown (glycogenolysis) / positive regulation of cyclic-nucleotide phosphodiesterase activity / organelle localization by membrane tethering / phosphatidylinositol bisphosphate binding / negative regulation of calcium ion export across plasma membrane / response to corticosterone / autophagosome membrane docking / mitochondrion-endoplasmic reticulum membrane tethering / CLEC7A (Dectin-1) induces NFAT activation / Activation of RAC1 downstream of NMDARs / regulation of cardiac muscle cell action potential / positive regulation of DNA binding / positive regulation of ryanodine-sensitive calcium-release channel activity / nitric-oxide synthase binding / regulation of cell communication by electrical coupling involved in cardiac conduction / Synthesis of IP3 and IP4 in the cytosol / negative regulation of peptidyl-threonine phosphorylation / Negative regulation of NMDA receptor-mediated neuronal transmission / Phase 0 - rapid depolarisation / startle response / Unblocking of NMDA receptors, glutamate binding and activation / negative regulation of ryanodine-sensitive calcium-release channel activity / protein phosphatase activator activity / RHO GTPases activate PAKs / Ion transport by P-type ATPases / : / Uptake and function of anthrax toxins / Long-term potentiation / adenylate cyclase binding / Regulation of MECP2 expression and activity / Calcineurin activates NFAT / catalytic complex / DARPP-32 events / detection of calcium ion / regulation of cardiac muscle contraction / axolemma / Smooth Muscle Contraction / regulation of ryanodine-sensitive calcium-release channel activity / RHO GTPases activate IQGAPs / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / calcium channel inhibitor activity / cellular response to interferon-beta / phosphatidylinositol 3-kinase binding / eNOS activation / Protein methylation / voltage-gated potassium channel complex / activation of adenylate cyclase activity / enzyme regulator activity / Activation of AMPK downstream of NMDARs / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / Ion homeostasis / : / titin binding / positive regulation of protein autophosphorylation / regulation of calcium-mediated signaling / 14-3-3 protein binding / sperm midpiece / calcium channel complex / potassium ion transmembrane transport / nitric-oxide synthase regulator activity / substantia nigra development / adenylate cyclase activator activity / response to amphetamine / Ras activation upon Ca2+ influx through NMDA receptor / regulation of heart rate / sarcomere / cellular response to calcium ion / FCERI mediated Ca+2 mobilization / protein serine/threonine kinase activator activity / FCGR3A-mediated IL10 synthesis / regulation of membrane potential / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / positive regulation of nitric-oxide synthase activity / VEGFR2 mediated vascular permeability / regulation of cytokinesis 類似検索 - 分子機能 | ||||||||||||
生物種 | Rattus norvegicus (ドブネズミ) 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: 3.78 Å | ||||||||||||
データ登録者 | Whicher, J.R. / MacKinnon, R. | ||||||||||||
資金援助 | 米国, 3件
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引用 | ジャーナル: Science / 年: 2016 タイトル: Structure of the voltage-gated K⁺ channel Eag1 reveals an alternative voltage sensing mechanism. 著者: Jonathan R Whicher / Roderick MacKinnon / 要旨: Voltage-gated potassium (K(v)) channels are gated by the movement of the transmembrane voltage sensor, which is coupled, through the helical S4-S5 linker, to the potassium pore. We determined the ...Voltage-gated potassium (K(v)) channels are gated by the movement of the transmembrane voltage sensor, which is coupled, through the helical S4-S5 linker, to the potassium pore. We determined the single-particle cryo-electron microscopy structure of mammalian K(v)10.1, or Eag1, bound to the channel inhibitor calmodulin, at 3.78 angstrom resolution. Unlike previous K(v) structures, the S4-S5 linker of Eag1 is a five-residue loop and the transmembrane segments are not domain swapped, which suggest an alternative mechanism of voltage-dependent gating. Additionally, the structure and position of the S4-S5 linker allow calmodulin to bind to the intracellular domains and to close the potassium pore, independent of voltage-sensor position. The structure reveals an alternative gating mechanism for K(v) channels and provides a template to further understand the gating properties of Eag1 and related channels. | ||||||||||||
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 | 5k7l.cif.gz | 177.9 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb5k7l.ent.gz | 130.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 5k7l.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 | 5k7l_validation.pdf.gz | 858.7 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 5k7l_full_validation.pdf.gz | 860.9 KB | 表示 | |
XML形式データ | 5k7l_validation.xml.gz | 31.6 KB | 表示 | |
CIF形式データ | 5k7l_validation.cif.gz | 47.6 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/k7/5k7l ftp://data.pdbj.org/pub/pdb/validation_reports/k7/5k7l | 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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対称性 | 点対称性: (シェーンフリース記号: C4 (4回回転対称)) |
-要素
#1: タンパク質 | 分子量: 97359.766 Da / 分子数: 1 / 断片: UNP residues 1-773, 888-962 / 由来タイプ: 組換発現 / 由来: (組換発現) Rattus norvegicus (ドブネズミ) / 遺伝子: Kcnh1, Eag / プラスミド: pEG BacMam / 細胞株 (発現宿主): HEK293 GnTI- / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q63472 |
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#2: タンパク質 | 分子量: 16852.545 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) 遺伝子: CALM1, CALM, CAM, CAM1, CALM2, CAM2, CAMB, CALM3, CALML2, CAM3, CAMC, CAMIII プラスミド: pEG BacMam / 細胞株 (発現宿主): HEK293 GnTI- / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P62158, UniProt: P0DP23*PLUS |
#3: 糖 | ChemComp-NAG / |
#4: 化合物 | ChemComp-Y01 / |
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 |
-試料調製
構成要素 |
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分子量 |
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由来(天然) |
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由来(組換発現) |
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緩衝液 | pH: 8 | ||||||||||||||||||||||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 4 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||||||||||||||||||
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: 86 % / 詳細: Plunged into liquid ethane (FEI VITROBOT MARK IV) |
-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 / 最大 デフォーカス(公称値): 3000 nm / 最小 デフォーカス(公称値): 1500 nm |
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: 1.8 e/Å2 / 検出モード: SUPER-RESOLUTION フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) 実像数: 1657 |
-解析
ソフトウェア | 名称: REFMAC / バージョン: 5.8.0088 / 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: 240000 詳細: Particles were auto-picked and manually inspected in RELION. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C4 (4回回転対称) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.78 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 145000 詳細: 2D classification, 3D classification, and refinement were performed in RELION. Final map generation was performed in FREALIGN. 対称性のタイプ: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: AB INITIO MODEL / 空間: RECIPROCAL | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化 | 解像度: 3.78→165 Å / Cor.coef. Fo:Fc: 0.979 / SU B: 61.954 / SU ML: 0.725 / ESU R: 0.687 立体化学のターゲット値: MAXIMUM LIKELIHOOD WITH PHASES 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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溶媒の処理 | イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 301.016 Å2
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拘束条件 |
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