+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7ukh | ||||||
---|---|---|---|---|---|---|---|
タイトル | Human Kv4.2-KChIP2-DPP6 channel complex in an open state, intracellular region | ||||||
要素 |
| ||||||
キーワード | MEMBRANE PROTEIN / potassium channel complex | ||||||
機能・相同性 | 機能・相同性情報 ER retention sequence binding / positive regulation of voltage-gated potassium channel activity / Kv4.2-KChIP2 channel complex / A-type (transient outward) potassium channel activity / Phase 1 - inactivation of fast Na+ channels / clustering of voltage-gated potassium channels / positive regulation of potassium ion export across plasma membrane / voltage-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / potassium channel complex / membrane repolarization during cardiac muscle cell action potential ...ER retention sequence binding / positive regulation of voltage-gated potassium channel activity / Kv4.2-KChIP2 channel complex / A-type (transient outward) potassium channel activity / Phase 1 - inactivation of fast Na+ channels / clustering of voltage-gated potassium channels / positive regulation of potassium ion export across plasma membrane / voltage-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / potassium channel complex / membrane repolarization during cardiac muscle cell action potential / potassium ion export across plasma membrane / membrane repolarization / Voltage gated Potassium channels / regulation of potassium ion transmembrane transport / anchoring junction / postsynaptic specialization membrane / regulation of heart contraction / action potential / neuronal cell body membrane / plasma membrane raft / locomotor rhythm / voltage-gated potassium channel activity / potassium channel activity / detection of calcium ion / neuronal action potential / potassium channel regulator activity / voltage-gated potassium channel complex / GABA-ergic synapse / muscle contraction / potassium ion transmembrane transport / sensory perception of pain / potassium ion transport / protein homooligomerization / cellular response to hypoxia / chemical synaptic transmission / perikaryon / postsynaptic membrane / transmembrane transporter binding / dendritic spine / neuronal cell body / glutamatergic synapse / dendrite / calcium ion binding / synapse / protein-containing complex binding / signal transduction / identical protein binding / metal ion binding / 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: 2.33 Å | ||||||
データ登録者 | Zhao, H. / Dai, Y. / Lee, C.H. | ||||||
資金援助 | 米国, 1件
| ||||||
引用 | ジャーナル: Mol Cell / 年: 2022 タイトル: Activation and closed-state inactivation mechanisms of the human voltage-gated K4 channel complexes. 著者: Wenlei Ye / Hongtu Zhao / Yaxin Dai / Yingdi Wang / Yu-Hua Lo / Lily Yeh Jan / Chia-Hsueh Lee / 要旨: The voltage-gated ion channel activity depends on both activation (transition from the resting state to the open state) and inactivation. Inactivation is a self-restraint mechanism to limit ion ...The voltage-gated ion channel activity depends on both activation (transition from the resting state to the open state) and inactivation. Inactivation is a self-restraint mechanism to limit ion conduction and is as crucial to membrane excitability as activation. Inactivation can occur when the channel is open or closed. Although open-state inactivation is well understood, the molecular basis of closed-state inactivation has remained elusive. We report cryo-EM structures of human K4.2 channel complexes in inactivated, open, and closed states. Closed-state inactivation of K4 involves an unprecedented symmetry breakdown for pore closure by only two of the four S4-S5 linkers, distinct from known mechanisms of open-state inactivation. We further capture K4 in a putative resting state, revealing how voltage sensor movements control the pore. Moreover, our structures provide insights regarding channel modulation by KChIP2 and DPP6 auxiliary subunits. Our findings elucidate mechanisms of closed-state inactivation and voltage-dependent activation of the K4 channel. | ||||||
履歴 |
|
-構造の表示
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 | 7ukh.cif.gz | 299.3 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb7ukh.ent.gz | 232.5 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7ukh.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 | 7ukh_validation.pdf.gz | 1.3 MB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 7ukh_full_validation.pdf.gz | 1.3 MB | 表示 | |
XML形式データ | 7ukh_validation.xml.gz | 56.1 KB | 表示 | |
CIF形式データ | 7ukh_validation.cif.gz | 75.2 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/uk/7ukh ftp://data.pdbj.org/pub/pdb/validation_reports/uk/7ukh | HTTPS FTP |
-関連構造データ
関連構造データ | 26581MC 7uk5C 7ukcC 7ukdC 7ukeC 7ukfC 7ukgC M: このデータのモデリングに利用したマップデータ C: 同じ文献を引用 (文献) |
---|---|
類似構造データ | 類似検索 - 機能・相同性F&H 検索 |
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
|
-要素
#1: タンパク質 | 分子量: 59049.332 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: KCND2, KIAA1044 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q9NZV8 #2: タンパク質 | 分子量: 28975.486 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: KCNIP2, KCHIP2 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q9NS61 #3: 化合物 | ChemComp-ZN / #4: 化合物 | ChemComp-CA / 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 | 名称: Human Kv4.2-KChIP2-DPP6 channel complex in an open state, intracellular region タイプ: COMPLEX / Entity ID: #1-#2 / 由来: RECOMBINANT |
---|---|
分子量 | 実験値: NO |
由来(天然) | 生物種: Homo sapiens (ヒト) |
由来(組換発現) | 生物種: Homo sapiens (ヒト) |
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: OTHER |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 1600 nm / 最小 デフォーカス(公称値): 600 nm |
撮影 | 電子線照射量: 85.9 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
-解析
CTF補正 | タイプ: NONE |
---|---|
3次元再構成 | 解像度: 2.33 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 278343 / 対称性のタイプ: POINT |