- EMDB-22661: Structure of NavAb/Nav1.7-VS2A chimera trapped in the resting sta... -
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基本情報
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データベース: EMDB / ID: EMD-22661
タイトル
Structure of NavAb/Nav1.7-VS2A chimera trapped in the resting state by tarantula toxin m3-Huwentoxin-IV
マップデータ
EM map without post-cut-off B-factor sharpening
試料
複合体: Complex of NavAb/Nav1.7-VS2A chimera and m3-Huwentoxin-IV
複合体: NavAb/Nav1.7-VS2A chimera
タンパク質・ペプチド: Maltose/maltodextrin-binding periplasmic protein,Ion transport protein,Sodium channel protein type 9 subunit alpha chimera
複合体: m3-Huwentoxin-IV
タンパク質・ペプチド: Mu-theraphotoxin-Hs2a
機能・相同性
機能・相同性情報
detection of mechanical stimulus involved in sensory perception / host cell presynaptic membrane / membrane depolarization during action potential / cardiac muscle cell action potential involved in contraction / voltage-gated sodium channel complex / Interaction between L1 and Ankyrins / voltage-gated sodium channel activity / ion channel inhibitor activity / detection of maltose stimulus / sodium ion transport ...detection of mechanical stimulus involved in sensory perception / host cell presynaptic membrane / membrane depolarization during action potential / cardiac muscle cell action potential involved in contraction / voltage-gated sodium channel complex / Interaction between L1 and Ankyrins / voltage-gated sodium channel activity / ion channel inhibitor activity / detection of maltose stimulus / sodium ion transport / maltose transport complex / behavioral response to pain / Phase 0 - rapid depolarisation / maltose binding / maltose transport / maltodextrin transmembrane transport / detection of temperature stimulus involved in sensory perception of pain / carbohydrate transport / carbohydrate transmembrane transporter activity / sodium channel regulator activity / sodium ion transmembrane transport / neuronal action potential / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / sensory perception of pain / ATP-binding cassette (ABC) transporter complex / cell chemotaxis / post-embryonic development / response to toxic substance / Sensory perception of sweet, bitter, and umami (glutamate) taste / 概日リズム / outer membrane-bounded periplasmic space / toxin activity / ペリプラズム / 炎症 / 神経繊維 / DNA damage response / extracellular region / 生体膜 / identical protein binding / metal ion binding / 細胞膜 類似検索 - 分子機能
Huwentoxin-1 family signature. / Huwentoxin, conserved site-1 / Huwentoxin-1 family / Ion channel inhibitory toxin / Voltage-gated Na+ ion channel, cytoplasmic domain / Cytoplasmic domain of voltage-gated Na+ ion channel / Voltage-gated sodium channel alpha subunit, inactivation gate / Sodium ion transport-associated / Sodium ion transport-associated / Voltage gated sodium channel, alpha subunit ...Huwentoxin-1 family signature. / Huwentoxin, conserved site-1 / Huwentoxin-1 family / Ion channel inhibitory toxin / Voltage-gated Na+ ion channel, cytoplasmic domain / Cytoplasmic domain of voltage-gated Na+ ion channel / Voltage-gated sodium channel alpha subunit, inactivation gate / Sodium ion transport-associated / Sodium ion transport-associated / Voltage gated sodium channel, alpha subunit / Voltage-gated cation channel calcium and sodium / Short calmodulin-binding motif containing conserved Ile and Gln residues. / IQ motif, EF-hand binding site / Maltose/Cyclodextrin ABC transporter, substrate-binding protein / Solute-binding family 1, conserved site / Bacterial extracellular solute-binding proteins, family 1 signature. / Voltage-dependent channel domain superfamily / Bacterial extracellular solute-binding protein / Bacterial extracellular solute-binding protein / Ion transport domain / Ion transport protein 類似検索 - ドメイン・相同性
Ion transport protein / Maltose/maltodextrin-binding periplasmic protein / Huwentoxin-IV / Sodium channel protein type 9 subunit alpha 類似検索 - 構成要素
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
R01 NS015751
米国
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)
R01 HL112808
米国
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)
R35 NS111573
米国
Howard Hughes Medical Institute (HHMI)
米国
引用
ジャーナル: Mol Cell / 年: 2021 タイトル: Structural Basis for High-Affinity Trapping of the Na1.7 Channel in Its Resting State by Tarantula Toxin. 著者: Goragot Wisedchaisri / Lige Tonggu / Tamer M Gamal El-Din / Eedann McCord / Ning Zheng / William A Catterall / 要旨: Voltage-gated sodium channels initiate electrical signals and are frequently targeted by deadly gating-modifier neurotoxins, including tarantula toxins, which trap the voltage sensor in its resting ...Voltage-gated sodium channels initiate electrical signals and are frequently targeted by deadly gating-modifier neurotoxins, including tarantula toxins, which trap the voltage sensor in its resting state. The structural basis for tarantula-toxin action remains elusive because of the difficulty of capturing the functionally relevant form of the toxin-channel complex. Here, we engineered the model sodium channel NaAb with voltage-shifting mutations and the toxin-binding site of human Na1.7, an attractive pain target. This mutant chimera enabled us to determine the cryoelectron microscopy (cryo-EM) structure of the channel functionally arrested by tarantula toxin. Our structure reveals a high-affinity resting-state-specific toxin-channel interaction between a key lysine residue that serves as a "stinger" and penetrates a triad of carboxyl groups in the S3-S4 linker of the voltage sensor. By unveiling this high-affinity binding mode, our studies establish a high-resolution channel-docking and resting-state locking mechanism for huwentoxin-IV and provide guidance for developing future resting-state-targeted analgesic drugs.