+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7cr7 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
タイトル | human KCNQ2-CaM in complex with retigabine | |||||||||
要素 |
| |||||||||
キーワード | TRANSPORT PROTEIN / ion channel | |||||||||
機能・相同性 | 機能・相同性情報 axon initial segment / Voltage gated Potassium channels / node of Ranvier / voltage-gated monoatomic cation channel activity / Interaction between L1 and Ankyrins / ankyrin binding / negative regulation of high voltage-gated calcium channel activity / positive regulation of cyclic-nucleotide phosphodiesterase activity / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential ...axon initial segment / Voltage gated Potassium channels / node of Ranvier / voltage-gated monoatomic cation channel activity / Interaction between L1 and Ankyrins / ankyrin binding / negative regulation of high voltage-gated calcium channel activity / positive regulation of cyclic-nucleotide phosphodiesterase activity / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / action potential / positive regulation of ryanodine-sensitive calcium-release channel activity / regulation of cell communication by electrical coupling involved in cardiac conduction / negative regulation of peptidyl-threonine phosphorylation / negative regulation of ryanodine-sensitive calcium-release channel activity / protein phosphatase activator activity / : / adenylate cyclase binding / voltage-gated potassium channel activity / catalytic complex / detection of calcium ion / regulation of cardiac muscle contraction / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / voltage-gated potassium channel complex / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / : / titin binding / positive regulation of protein autophosphorylation / regulation of calcium-mediated signaling / sperm midpiece / calcium channel complex / potassium ion transmembrane transport / substantia nigra development / adenylate cyclase activator activity / regulation of heart rate / sarcomere / protein serine/threonine kinase activator activity / regulation of cytokinesis / positive regulation of peptidyl-threonine phosphorylation / spindle microtubule / positive regulation of protein serine/threonine kinase activity / spindle pole / response to calcium ion / calcium-dependent protein binding / G2/M transition of mitotic cell cycle / myelin sheath / nervous system development / chemical synaptic transmission / vesicle / transmembrane transporter binding / calmodulin binding / G protein-coupled receptor signaling pathway / centrosome / calcium ion binding / synapse / protein kinase binding / protein-containing complex / membrane / nucleus / plasma membrane / cytoplasm 類似検索 - 分子機能 | |||||||||
生物種 | 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: 3.7 Å | |||||||||
データ登録者 | Li, X. / Lv, D. / Wang, J. / Ye, S. / Guo, J. | |||||||||
資金援助 | 中国, 2件
| |||||||||
引用 | ジャーナル: Cell Res / 年: 2021 タイトル: Molecular basis for ligand activation of the human KCNQ2 channel. 著者: Xiaoxiao Li / Qiansen Zhang / Peipei Guo / Jie Fu / Lianghe Mei / Dashuai Lv / Jiangqin Wang / Dongwu Lai / Sheng Ye / Huaiyu Yang / Jiangtao Guo / 要旨: The voltage-gated potassium channel KCNQ2 is responsible for M-current in neurons and is an important drug target to treat epilepsy, pain and several other diseases related to neuronal hyper- ...The voltage-gated potassium channel KCNQ2 is responsible for M-current in neurons and is an important drug target to treat epilepsy, pain and several other diseases related to neuronal hyper-excitability. A list of synthetic compounds have been developed to directly activate KCNQ2, yet our knowledge of their activation mechanism is limited, due to lack of high-resolution structures. Here, we report cryo-electron microscopy (cryo-EM) structures of the human KCNQ2 determined in apo state and in complex with two activators, ztz240 or retigabine, which activate KCNQ2 through different mechanisms. The activator-bound structures, along with electrophysiology analysis, reveal that ztz240 binds at the voltage-sensing domain and directly stabilizes it at the activated state, whereas retigabine binds at the pore domain and activates the channel by an allosteric modulation. By accurately defining ligand-binding sites, these KCNQ2 structures not only reveal different ligand recognition and activation mechanisms, but also provide a structural basis for drug optimization and design. | |||||||||
履歴 |
|
-構造の表示
ムービー |
ムービービューア |
---|---|
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 | 7cr7.cif.gz | 371.4 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb7cr7.ent.gz | 297.5 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7cr7.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 | 7cr7_validation.pdf.gz | 1.1 MB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 7cr7_full_validation.pdf.gz | 1.4 MB | 表示 | |
XML形式データ | 7cr7_validation.xml.gz | 93.2 KB | 表示 | |
CIF形式データ | 7cr7_validation.cif.gz | 132.7 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/cr/7cr7 ftp://data.pdbj.org/pub/pdb/validation_reports/cr/7cr7 | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
|
-要素
#1: タンパク質 | 分子量: 73627.812 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: KCNQ2 / 細胞株 (発現宿主): HEK297 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: O43526 #2: タンパク質 | 分子量: 16852.545 Da / 分子数: 4 / 由来タイプ: 天然 / 由来: (天然) Homo sapiens (ヒト) / 参照: UniProt: P0DP25 #3: 化合物 | ChemComp-FBX / 研究の焦点であるリガンドがあるか | Y | |
---|
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
---|---|
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 |
| ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
由来(天然) |
| ||||||||||||||||||||||||
由来(組換発現) | 生物種: Homo sapiens (ヒト) / 細胞: HEK293 | ||||||||||||||||||||||||
緩衝液 | pH: 8 | ||||||||||||||||||||||||
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES | ||||||||||||||||||||||||
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 |
---|---|
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: 1.556 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: 1.15.2_3472: / 分類: 精密化 | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.7 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 67671 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
|