+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7s5v | ||||||
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タイトル | Human KATP channel in open conformation, focused on SUR | ||||||
要素 | ATP-binding cassette sub-family C member 8 | ||||||
キーワード | MEMBRANE PROTEIN / ion channel / KATP / ATP-sensitive potassium channel | ||||||
機能・相同性 | 機能・相同性情報 negative regulation of neuroblast migration / positive regulation of uterine smooth muscle relaxation / ATP sensitive Potassium channels / Defective ABCC8 can cause hypo- and hyper-glycemias / potassium ion-transporting ATPase complex / positive regulation of tight junction disassembly / negative regulation of low-density lipoprotein particle clearance / negative regulation of blood-brain barrier permeability / ATP-activated inward rectifier potassium channel activity / glutamate secretion, neurotransmission ...negative regulation of neuroblast migration / positive regulation of uterine smooth muscle relaxation / ATP sensitive Potassium channels / Defective ABCC8 can cause hypo- and hyper-glycemias / potassium ion-transporting ATPase complex / positive regulation of tight junction disassembly / negative regulation of low-density lipoprotein particle clearance / negative regulation of blood-brain barrier permeability / ATP-activated inward rectifier potassium channel activity / glutamate secretion, neurotransmission / inward rectifying potassium channel / sulfonylurea receptor activity / positive regulation of potassium ion transport / ATPase-coupled monoatomic cation transmembrane transporter activity / response to pH / inorganic cation transmembrane transport / neuromuscular process / negative regulation of glial cell proliferation / response to zinc ion / potassium ion import across plasma membrane / intracellular glucose homeostasis / positive regulation of insulin secretion involved in cellular response to glucose stimulus / ATPase-coupled transmembrane transporter activity / potassium channel activity / ABC-type transporter activity / negative regulation of insulin secretion / potassium ion transmembrane transport / negative regulation of angiogenesis / Regulation of insulin secretion / female pregnancy / ADP binding / response to insulin / visual learning / potassium ion transport / transmembrane transport / sarcolemma / memory / synaptic vesicle membrane / positive regulation of tumor necrosis factor production / transmembrane transporter binding / response to lipopolysaccharide / response to xenobiotic stimulus / ATP hydrolysis activity / ATP binding / membrane / plasma membrane 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: 3.3 Å | ||||||
データ登録者 | Zhao, C. / MacKinnon, R. | ||||||
資金援助 | 米国, 1件
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引用 | ジャーナル: Proc Natl Acad Sci U S A / 年: 2021 タイトル: Molecular structure of an open human K channel. 著者: Chen Zhao / Roderick MacKinnon / 要旨: K channels are metabolic sensors that translate intracellular ATP/ADP balance into membrane excitability. The molecular composition of K includes an inward-rectifier potassium channel (Kir) and an ...K channels are metabolic sensors that translate intracellular ATP/ADP balance into membrane excitability. The molecular composition of K includes an inward-rectifier potassium channel (Kir) and an ABC transporter-like sulfonylurea receptor (SUR). Although structures of K have been determined in many conformations, in all cases, the pore in Kir is closed. Here, we describe human pancreatic K (hK) structures with an open pore at 3.1- to 4.0-Å resolution using single-particle cryo-electron microscopy (cryo-EM). Pore opening is associated with coordinated structural changes within the ATP-binding site and the channel gate in Kir. Conformational changes in SUR are also observed, resulting in an area reduction of contact surfaces between SUR and Kir. We also observe that pancreatic hK exhibits the unique (among inward-rectifier channels) property of PIP-independent opening, which appears to be correlated with a docked cytoplasmic domain in the absence of PIP. | ||||||
履歴 |
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-構造の表示
ムービー |
ムービービューア |
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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 | 7s5v.cif.gz | 259.8 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb7s5v.ent.gz | 200.9 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7s5v.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 | 7s5v_validation.pdf.gz | 1 MB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 7s5v_full_validation.pdf.gz | 1 MB | 表示 | |
XML形式データ | 7s5v_validation.xml.gz | 46.9 KB | 表示 | |
CIF形式データ | 7s5v_validation.cif.gz | 72.1 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/s5/7s5v ftp://data.pdbj.org/pub/pdb/validation_reports/s5/7s5v | HTTPS FTP |
-関連構造データ
-リンク
-集合体
登録構造単位 |
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-要素
#1: タンパク質 | 分子量: 177106.078 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: ABCC8, HRINS, SUR, SUR1 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q09428 | ||||
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#2: 化合物 | ChemComp-ADP / | ||||
#3: 化合物 | #4: 化合物 | ChemComp-ATP / | 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 |
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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 KATP channel composed of Kir6.2 (C166S G334D) and SUR1 タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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分子量 | 値: 881.87 kDa/nm / 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: 8.5 |
試料 | 濃度: 6.83 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
試料支持 | グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: ETHANE / 湿度: 100 % / 凍結前の試料温度: 289 K |
-電子顕微鏡撮影
実験機器 | モデル: Titan Krios / 画像提供: FEI Company |
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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 / C2レンズ絞り径: 100 µm |
撮影 | 電子線照射量: 57 e/Å2 / 検出モード: SUPER-RESOLUTION 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: 1.17.1_3660: / 分類: 精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 144706 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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