+
データを開く
-
基本情報
| 登録情報 | データベース: PDB / ID: 9ed1 | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| タイトル | Cryo-EM structure of the human KCa3.1/calmodulin channel in complex with Ca2+ and 1,4-dihydropyridine (DHP-103) | |||||||||||||||
要素 |
| |||||||||||||||
キーワード | TRANSPORT PROTEIN / Ion channel / Membrane protein / Ca-binding protein | |||||||||||||||
| 機能・相同性 | 機能・相同性情報intermediate conductance calcium-activated potassium channel activity / saliva secretion / small conductance calcium-activated potassium channel activity / Ca2+ activated K+ channels / stabilization of membrane potential / macropinocytosis / calcium-activated potassium channel activity / regulation of calcium ion import across plasma membrane / positive regulation of potassium ion transmembrane transport / establishment of protein localization to mitochondrial membrane ...intermediate conductance calcium-activated potassium channel activity / saliva secretion / small conductance calcium-activated potassium channel activity / Ca2+ activated K+ channels / stabilization of membrane potential / macropinocytosis / calcium-activated potassium channel activity / regulation of calcium ion import across plasma membrane / positive regulation of potassium ion transmembrane transport / establishment of protein localization to mitochondrial membrane / type 3 metabotropic glutamate receptor binding / establishment of protein localization to membrane / cell volume homeostasis / phospholipid translocation / negative regulation of ryanodine-sensitive calcium-release channel activity / organelle localization by membrane tethering / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / presynaptic endocytosis / nitric-oxide synthase binding / positive regulation of T cell receptor signaling pathway / regulation of synaptic vesicle exocytosis / calcineurin-mediated signaling / adenylate cyclase binding / regulation of ryanodine-sensitive calcium-release channel activity / protein phosphatase activator activity / immune system process / detection of calcium ion / catalytic complex / regulation of synaptic vesicle endocytosis / regulation of cardiac muscle contraction / potassium channel activity / postsynaptic cytosol / cellular response to interferon-beta / phosphatidylinositol 3-kinase binding / calcium channel inhibitor activity / presynaptic cytosol / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / titin binding / sperm midpiece / regulation of calcium-mediated signaling / voltage-gated potassium channel complex / potassium ion transmembrane transport / calcium channel complex / regulation of heart rate / calyx of Held / response to amphetamine / adenylate cyclase activator activity / sarcomere / nitric-oxide synthase regulator activity / protein serine/threonine kinase activator activity / regulation of cytokinesis / positive regulation of protein secretion / spindle microtubule / calcium channel regulator activity / positive regulation of receptor signaling pathway via JAK-STAT / establishment of localization in cell / defense response / response to calcium ion / potassium ion transport / cellular response to type II interferon / G2/M transition of mitotic cell cycle / Schaffer collateral - CA1 synapse / ruffle membrane / spindle pole / calcium-dependent protein binding / calcium ion transport / myelin sheath / growth cone / protein phosphatase binding / protein homotetramerization / vesicle / transmembrane transporter binding / calmodulin binding / neuron projection / protein domain specific binding / neuronal cell body / calcium ion binding / centrosome / protein kinase binding / protein homodimerization activity / protein-containing complex / mitochondrion / nucleoplasm / plasma membrane / cytoplasm / cytosol 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: 3.5 Å | |||||||||||||||
データ登録者 | Nam, Y.W. / Zhang, M. | |||||||||||||||
| 資金援助 | 米国, 4件
| |||||||||||||||
引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2025タイトル: Design and structural basis of selective 1,4-dihydropyridine inhibitors of the calcium-activated potassium channel K3.1. 著者: Seow Theng Ong / Young-Woo Nam / Joshua A Nasburg / Alena Ramanishka / Xuan Rui Ng / Zhong Zhuang / Stephanie Shee Min Goay / Hai M Nguyen / Latika Singh / Vikrant Singh / Alicia Rivera / M ...著者: Seow Theng Ong / Young-Woo Nam / Joshua A Nasburg / Alena Ramanishka / Xuan Rui Ng / Zhong Zhuang / Stephanie Shee Min Goay / Hai M Nguyen / Latika Singh / Vikrant Singh / Alicia Rivera / M Elaine Eyster / Yang Xu / Seth L Alper / Heike Wulff / Miao Zhang / K George Chandy / ![]() 要旨: The 1,4-dihydropyridines, drugs with well-established bioavailability and toxicity profiles, have proven efficacy in treating human hypertension, peripheral vascular disorders, and coronary artery ...The 1,4-dihydropyridines, drugs with well-established bioavailability and toxicity profiles, have proven efficacy in treating human hypertension, peripheral vascular disorders, and coronary artery disease. Every 1,4-dihydropyridine in clinical use blocks L-type voltage-gated calcium channels. We now report our development, using selective optimization of a side activity (SOSA), of a class of 1,4-dihydropyridines that selectively and potently inhibit the intermediate-conductance calcium-activated K channel K3.1, a validated therapeutic target for diseases affecting many organ systems. One of these 1,4-dihydropyridines, DHP-103, blocked K3.1 with an IC of 6 nM and exhibited exquisite selectivity over calcium channels and a panel of >100 additional molecular targets. Using high-resolution structure determination by cryogenic electron microscopy together with mutagenesis and electrophysiology, we delineated the drug binding pocket for DHP-103 within the water-filled central cavity of the K3.1 channel pore, where bound drug directly impedes ion permeation. DHP-103 inhibited gain-of-function mutant K3.1 channels that cause hereditary xerocytosis, suggesting its potential use as a therapeutic for this hemolytic anemia. In a rat model of acute ischemic stroke, the second leading cause of death worldwide, DHP-103 administered 12 h postischemic insult in proof-of-concept studies reduced infarct volume, improved balance beam performance (measure of proprioception) and decreased numbers of activated microglia in infarcted areas. K3.1-selective 1,4-dihydropyridines hold promise for the many diseases for which K3.1 has been experimentally confirmed as a therapeutic target. | |||||||||||||||
| 履歴 |
|
-
構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
|---|
-
ダウンロードとリンク
-
ダウンロード
| PDBx/mmCIF形式 | 9ed1.cif.gz | 343.7 KB | 表示 | PDBx/mmCIF形式 |
|---|---|---|---|---|
| PDB形式 | pdb9ed1.ent.gz | 280 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 9ed1.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 | 9ed1_validation.pdf.gz | 1.2 MB | 表示 | wwPDB検証レポート |
|---|---|---|---|---|
| 文書・詳細版 | 9ed1_full_validation.pdf.gz | 1.2 MB | 表示 | |
| XML形式データ | 9ed1_validation.xml.gz | 62.4 KB | 表示 | |
| CIF形式データ | 9ed1_validation.cif.gz | 92.8 KB | 表示 | |
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/ed/9ed1 ftp://data.pdbj.org/pub/pdb/validation_reports/ed/9ed1 | HTTPS FTP |
-関連構造データ
| 関連構造データ | ![]() 47930MC 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 ( |
|---|---|
| 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: 42598.633 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: KCNN4, IK1, IKCA1, KCA4, SK4 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: O15554#2: タンパク質 | 分子量: 16406.004 Da / 分子数: 4 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() Homo sapiens (ヒト) / 参照: UniProt: P0DP29#3: 化合物 | ChemComp-K / #4: 化合物 | ChemComp-CA / 研究の焦点であるリガンドがあるか | Y | Has protein modification | N | |
|---|
-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 SK4-CaM channel complex in the presence of calcium. タイプ: COMPLEX / Entity ID: #1-#2 / 由来: MULTIPLE SOURCES |
|---|---|
| 分子量 | 値: 0.23166 MDa / 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) / 株: HEK293s / 細胞: HEK293s / プラスミド: pEGBacMam |
| 緩衝液 | pH: 8 |
| 試料 | 濃度: 2 mg/ml / 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: TFS 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 / 最大 デフォーカス(公称値): 2300 nm / 最小 デフォーカス(公称値): 1300 nm |
| 試料ホルダ | 試料ホルダーモデル: FEI TITAN KRIOS AUTOGRID HOLDER |
| 撮影 | 電子線照射量: 50 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
-
解析
| EMソフトウェア |
| ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 109449 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 拘束条件 |
|
ムービー
コントローラー
万見について




Homo sapiens (ヒト)

米国, 4件
引用

PDBj







FIELD EMISSION GUN