- PDB-6pby: Single particle cryo-EM structure of the voltage-gated K+ channel... -
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基本情報
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データベース: PDB / ID: 6pby
タイトル
Single particle cryo-EM structure of the voltage-gated K+ channel Eag1 3-13 deletion mutant bound to calmodulin (conformation 1)
要素
Calmodulin-1
Potassium voltage-gated channel subfamily H member 1
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 / delayed rectifier potassium channel activity / voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / nuclear inner membrane / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / Calmodulin induced events ...Voltage gated Potassium channels / potassium channel complex / regulation of presynaptic cytosolic calcium ion concentration / delayed rectifier potassium channel activity / voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / nuclear inner membrane / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / Calmodulin induced events / Reduction of cytosolic Ca++ levels / 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 / PKA activation / CaMK IV-mediated phosphorylation of CREB / negative regulation of high voltage-gated calcium channel activity / Glycogen breakdown (glycogenolysis) / CLEC7A (Dectin-1) induces NFAT activation / phosphatidylinositol bisphosphate binding / Activation of RAC1 downstream of NMDARs / negative regulation of calcium ion export across plasma membrane / organelle localization by membrane tethering / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / regulation of synaptic vesicle exocytosis / presynaptic endocytosis / regulation of cardiac muscle cell action potential / parallel fiber to Purkinje cell synapse / positive regulation of ryanodine-sensitive calcium-release channel activity / Synthesis of IP3 and IP4 in the cytosol / regulation of cell communication by electrical coupling involved in cardiac conduction / Phase 0 - rapid depolarisation / Negative regulation of NMDA receptor-mediated neuronal transmission / startle response / negative regulation of ryanodine-sensitive calcium-release channel activity / Unblocking of NMDA receptors, glutamate binding and activation / RHO GTPases activate PAKs / calcineurin-mediated signaling / Ion transport by P-type ATPases / Uptake and function of anthrax toxins / Long-term potentiation / Regulation of MECP2 expression and activity / Calcineurin activates NFAT / protein phosphatase activator activity / regulation of ryanodine-sensitive calcium-release channel activity / DARPP-32 events / axolemma / Smooth Muscle Contraction / catalytic complex / detection of calcium ion / regulation of cardiac muscle contraction / RHO GTPases activate IQGAPs / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / presynaptic cytosol / calcium channel inhibitor activity / cellular response to interferon-beta / Protein methylation / Activation of AMPK downstream of NMDARs / Ion homeostasis / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / eNOS activation / regulation of calcium-mediated signaling / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / titin binding / voltage-gated potassium channel complex / 14-3-3 protein binding / potassium ion transmembrane transport / sperm midpiece / substantia nigra development / calcium channel complex / calyx of Held / FCERI mediated Ca+2 mobilization / Ras activation upon Ca2+ influx through NMDA receptor / FCGR3A-mediated IL10 synthesis / adenylate cyclase activator activity / regulation of heart rate / cellular response to calcium ion / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / protein serine/threonine kinase activator activity / VEGFR2 mediated cell proliferation / sarcomere / regulation of cytokinesis / VEGFR2 mediated vascular permeability / regulation of membrane potential / Translocation of SLC2A4 (GLUT4) to the plasma membrane / positive regulation of receptor signaling pathway via JAK-STAT / spindle microtubule / RAF activation / Transcriptional activation of mitochondrial biogenesis / postsynaptic density membrane / potassium ion transport / Stimuli-sensing channels / cellular response to type II interferon / long-term synaptic potentiation / response to calcium ion / RAS processing / spindle pole / Signaling by RAF1 mutants 類似検索 - 分子機能
Potassium channel, voltage-dependent, EAG / : / Potassium channel, voltage-dependent, EAG/ELK/ERG / PAS domain / PAS-associated, C-terminal / PAC domain profile. / PAC motif / Motif C-terminal to PAS motifs (likely to contribute to PAS structural domain) / Cyclic nucleotide-monophosphate binding domain / Cyclic nucleotide-binding domain ...Potassium channel, voltage-dependent, EAG / : / Potassium channel, voltage-dependent, EAG/ELK/ERG / PAS domain / PAS-associated, C-terminal / PAC domain profile. / PAC motif / Motif C-terminal to PAS motifs (likely to contribute to PAS structural domain) / Cyclic nucleotide-monophosphate binding domain / Cyclic nucleotide-binding domain / cAMP/cGMP binding motif profile. / Cyclic nucleotide-binding domain / Cyclic nucleotide-binding domain superfamily / Jelly Rolls / EF-hand / : / Recoverin; domain 1 / PAS repeat profile. / PAS domain / RmlC-like jelly roll fold / PAS domain superfamily / EF-hand domain pair / EF-hand, calcium binding motif / EF-Hand 1, calcium-binding site / EF-hand calcium-binding domain. / EF-hand calcium-binding domain profile. / EF-hand domain / Ion transport domain / Ion transport protein / EF-hand domain pair / Jelly Rolls / Sandwich / Orthogonal Bundle / Mainly Beta / Mainly Alpha 類似検索 - ドメイン・相同性
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM43949
米国
Howard Hughes Medical Institute (HHMI)
米国
Damon Runyon Cancer Research Foundation
DRG-2212-15
米国
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.
A: Potassium voltage-gated channel subfamily H member 1 B: Calmodulin-1 D: Calmodulin-1 F: Calmodulin-1 H: Calmodulin-1 C: Potassium voltage-gated channel subfamily H member 1 E: Potassium voltage-gated channel subfamily H member 1 G: Potassium voltage-gated channel subfamily H member 1