+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7f3f | ||||||
---|---|---|---|---|---|---|---|
タイトル | CryoEM structure of human Kv4.2-KChIP1 complex | ||||||
要素 |
| ||||||
キーワード | MEMBRANE PROTEIN / complex | ||||||
機能・相同性 | 機能・相同性情報 Kv4.3-KChIP1 channel complex / Kv4.2-KChIP2 channel complex / A-type (transient outward) potassium channel activity / Phase 1 - inactivation of fast Na+ channels / voltage-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / potassium ion export across plasma membrane / membrane repolarization / Voltage gated Potassium channels / regulation of potassium ion transmembrane transport / anchoring junction ...Kv4.3-KChIP1 channel complex / Kv4.2-KChIP2 channel complex / A-type (transient outward) potassium channel activity / Phase 1 - inactivation of fast Na+ channels / voltage-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane 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 / 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 / protein homooligomerization / cytoplasmic side of plasma membrane / 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 / 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: 3.1 Å | ||||||
データ登録者 | Kise, Y. / Nureki, O. | ||||||
資金援助 | 日本, 1件
| ||||||
引用 | ジャーナル: Nature / 年: 2021 タイトル: Structural basis of gating modulation of Kv4 channel complexes. 著者: Yoshiaki Kise / Go Kasuya / Hiroyuki H Okamoto / Daichi Yamanouchi / Kan Kobayashi / Tsukasa Kusakizako / Tomohiro Nishizawa / Koichi Nakajo / Osamu Nureki / 要旨: Modulation of voltage-gated potassium (Kv) channels by auxiliary subunits is central to the physiological function of channels in the brain and heart. Native Kv4 tetrameric channels form ...Modulation of voltage-gated potassium (Kv) channels by auxiliary subunits is central to the physiological function of channels in the brain and heart. Native Kv4 tetrameric channels form macromolecular ternary complexes with two auxiliary β-subunits-intracellular Kv channel-interacting proteins (KChIPs) and transmembrane dipeptidyl peptidase-related proteins (DPPs)-to evoke rapidly activating and inactivating A-type currents, which prevent the backpropagation of action potentials. However, the modulatory mechanisms of Kv4 channel complexes remain largely unknown. Here we report cryo-electron microscopy structures of the Kv4.2-DPP6S-KChIP1 dodecamer complex, the Kv4.2-KChIP1 and Kv4.2-DPP6S octamer complexes, and Kv4.2 alone. The structure of the Kv4.2-KChIP1 complex reveals that the intracellular N terminus of Kv4.2 interacts with its C terminus that extends from the S6 gating helix of the neighbouring Kv4.2 subunit. KChIP1 captures both the N and the C terminus of Kv4.2. In consequence, KChIP1 would prevent N-type inactivation and stabilize the S6 conformation to modulate gating of the S6 helices within the tetramer. By contrast, unlike the reported auxiliary subunits of voltage-gated channel complexes, DPP6S interacts with the S1 and S2 helices of the Kv4.2 voltage-sensing domain, which suggests that DPP6S stabilizes the conformation of the S1-S2 helices. DPP6S may therefore accelerate the voltage-dependent movement of the S4 helices. KChIP1 and DPP6S do not directly interact with each other in the Kv4.2-KChIP1-DPP6S ternary complex. Thus, our data suggest that two distinct modes of modulation contribute in an additive manner to evoke A-type currents from the native Kv4 macromolecular complex. | ||||||
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 | 7f3f.cif.gz | 449.4 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb7f3f.ent.gz | 366.2 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7f3f.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 | 7f3f_validation.pdf.gz | 1.1 MB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 7f3f_full_validation.pdf.gz | 1.2 MB | 表示 | |
XML形式データ | 7f3f_validation.xml.gz | 71.8 KB | 表示 | |
CIF形式データ | 7f3f_validation.cif.gz | 108.8 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/f3/7f3f ftp://data.pdbj.org/pub/pdb/validation_reports/f3/7f3f | HTTPS FTP |
-関連構造データ
関連構造データ | 31433MC 7e7zC 7e83C 7e84C 7e87C 7e89C 7e8bC 7e8eC 7e8gC 7e8hC 7f0jC 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 |
-リンク
-集合体
登録構造単位 |
|
---|---|
1 |
|
-要素
#1: タンパク質 | 分子量: 70575.430 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: 25273.670 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: KCNIP1, KCHIP1, VABP / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q9NZI2 |
---|
-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) |
| ||||||||||||||||||
緩衝液 | pH: 7.4 | ||||||||||||||||||
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: 50 e/Å2 フィルム・検出器のモデル: GATAN K3 BIOQUANTUM (6k x 4k) |
-解析
ソフトウェア | 名称: PHENIX / バージョン: 1.19_4092: / 分類: 精密化 | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.1 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 434296 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
|