+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6pbx | ||||||||||||
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タイトル | Single particle cryo-EM structure of the voltage-gated K+ channel Eag1 3-13 deletion mutant bound to calmodulin (conformation 2) | ||||||||||||
要素 |
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キーワード | TRANSPORT PROTEIN/CALCIUM BINDING PROTEIN / Voltage-gated potassium channel / ion channel / calmodulin / TRANSPORT PROTEIN-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 / voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / delayed rectifier potassium channel activity / parallel fiber to Purkinje cell synapse / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / nuclear inner membrane ...Voltage gated Potassium channels / potassium channel complex / regulation of presynaptic cytosolic calcium ion concentration / voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / delayed rectifier potassium channel activity / parallel fiber to Purkinje cell synapse / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / nuclear inner membrane / 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 / PKA activation / negative regulation of high voltage-gated calcium channel activity / CaMK IV-mediated phosphorylation of CREB / regulation of synaptic vesicle exocytosis / Glycogen breakdown (glycogenolysis) / positive regulation of cyclic-nucleotide phosphodiesterase activity / organelle localization by membrane tethering / negative regulation of calcium ion export across plasma membrane / phosphatidylinositol bisphosphate binding / CLEC7A (Dectin-1) induces NFAT activation / autophagosome membrane docking / mitochondrion-endoplasmic reticulum membrane tethering / Activation of RAC1 downstream of NMDARs / regulation of cardiac muscle cell action potential / positive regulation of ryanodine-sensitive calcium-release channel activity / 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 / startle response / Negative regulation of NMDA receptor-mediated neuronal transmission / Phase 0 - rapid depolarisation / 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 / Regulation of MECP2 expression and activity / Calcineurin activates NFAT / catalytic complex / DARPP-32 events / detection of calcium ion / regulation of cardiac muscle contraction / Smooth Muscle Contraction / axolemma / 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 / eNOS activation / Protein methylation / voltage-gated potassium channel complex / 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 / sperm midpiece / 14-3-3 protein binding / calcium channel complex / potassium ion transmembrane transport / substantia nigra development / adenylate cyclase activator activity / Ras activation upon Ca2+ influx through NMDA receptor / regulation of heart rate / sarcomere / cellular response to calcium ion / FCERI mediated Ca+2 mobilization / FCGR3A-mediated IL10 synthesis / protein serine/threonine kinase activator activity / regulation of membrane potential / VEGFR2 mediated vascular permeability / VEGFR2 mediated cell proliferation / regulation of cytokinesis / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / positive regulation of peptidyl-threonine phosphorylation / spindle microtubule / Translocation of SLC2A4 (GLUT4) to the plasma membrane / positive regulation of receptor signaling pathway via JAK-STAT / RAF activation / postsynaptic density membrane / Transcriptional activation of mitochondrial biogenesis / positive regulation of protein serine/threonine kinase activity / potassium ion transport / Stimuli-sensing channels / cellular response to type II interferon / spindle pole / response to calcium ion 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: 4 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: Elife / 年: 2019 タイトル: Regulation of Eag1 gating by its intracellular domains. 著者: Jonathan R Whicher / Roderick MacKinnon / 要旨: Voltage-gated potassium channels (Ks) are gated by transmembrane voltage sensors (VS) that move in response to changes in membrane voltage. K10.1 or Eag1 also has three intracellular domains: PAS, C- ...Voltage-gated potassium channels (Ks) are gated by transmembrane voltage sensors (VS) that move in response to changes in membrane voltage. K10.1 or Eag1 also has three intracellular domains: PAS, C-linker, and CNBHD. We demonstrate that the Eag1 intracellular domains are not required for voltage-dependent gating but likely interact with the VS to modulate gating. We identified specific interactions between the PAS, CNBHD, and VS that modulate voltage-dependent gating and provide evidence that VS movement destabilizes these interactions to promote channel opening. Additionally, mutation of these interactions renders Eag1 insensitive to calmodulin inhibition. The structure of the calmodulin insensitive mutant in a pre-open conformation suggests that channel opening may occur through a rotation of the intracellular domains and calmodulin may prevent this rotation by stabilizing interactions between the VS and intracellular domains. Intracellular domains likely play a similar modulatory role in voltage-dependent gating of the related K11-12 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 | 6pbx.cif.gz | 604.4 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6pbx.ent.gz | 471 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6pbx.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 | 6pbx_validation.pdf.gz | 1 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 6pbx_full_validation.pdf.gz | 1.1 MB | 表示 | |
XML形式データ | 6pbx_validation.xml.gz | 81 KB | 表示 | |
CIF形式データ | 6pbx_validation.cif.gz | 125.9 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/pb/6pbx ftp://data.pdbj.org/pub/pdb/validation_reports/pb/6pbx | 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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1 |
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-要素
#1: タンパク質 | 分子量: 96261.430 Da / 分子数: 4 / 断片: UNP residues 14-773,888-962 / 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 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q63472 #2: タンパク質 | 分子量: 16852.545 Da / 分子数: 4 / 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 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: P0DP23 |
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-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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由来(天然) |
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由来(組換発現) |
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緩衝液 | pH: 8 | ||||||||||||||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||
試料支持 | 詳細: unspecified | ||||||||||||||||||||||||
急速凍結 | 凍結剤: ETHANE |
-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 |
撮影 | 電子線照射量: 1.6 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.14_3260: / 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 | ||||||||||||||||||||||||||||||||
対称性 | 点対称性: C4 (4回回転対称) | ||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 4 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 54530 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: FLEXIBLE FIT / 空間: REAL | ||||||||||||||||||||||||||||||||
原子モデル構築 | PDB-ID: 5K7L Accession code: 5K7L / Source name: PDB / タイプ: experimental model |