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基本情報
| 登録情報 | データベース: PDB / ID: 7y1j | ||||||||||||
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| タイトル | Structure of SUR2A in complex with Mg-ATP and repaglinide in the inward-facing conformation. | ||||||||||||
要素 | ATP-binding cassette sub-family C member 9 | ||||||||||||
キーワード | MEMBRANE PROTEIN / SUR2A / ABC transporter / repaglinide | ||||||||||||
| 機能・相同性 | 機能・相同性情報vascular process in circulatory system / substrate-dependent cell migration, cell contraction / oxygen metabolic process / reactive oxygen species biosynthetic process / ATP sensitive Potassium channels / response to decreased oxygen levels / ABC-family protein mediated transport / potassium channel activator activity / inward rectifying potassium channel / sulfonylurea receptor activity ...vascular process in circulatory system / substrate-dependent cell migration, cell contraction / oxygen metabolic process / reactive oxygen species biosynthetic process / ATP sensitive Potassium channels / response to decreased oxygen levels / ABC-family protein mediated transport / potassium channel activator activity / inward rectifying potassium channel / sulfonylurea receptor activity / response to potassium ion / response to peptide / cardiac conduction / response to oxygen levels / ATPase-coupled monoatomic cation transmembrane transporter activity / response to hydrogen sulfide / cellular response to chemical stress / coronary vasculature development / regulation of potassium ion transmembrane transport / cellular response to potassium ion / circulatory system development / cellular respiration / heterocyclic compound binding / syntaxin binding / : / blood circulation / cardiac muscle cell contraction / Ion homeostasis / blood vessel development / fatty acid oxidation / response to ATP / cellular response to ATP / potassium ion import across plasma membrane / response to stress / ATPase-coupled transmembrane transporter activity / monoatomic cation transmembrane transport / action potential / potassium channel regulator activity / potassium channel activity / ABC-type transporter activity / skeletal muscle tissue development / heart morphogenesis / ATP metabolic process / negative regulation of blood pressure / potassium ion transmembrane transport / T-tubule / cellular response to calcium ion / acrosomal vesicle / blood vessel diameter maintenance / response to activity / sarcomere / response to hydrogen peroxide / potassium ion transport / mitochondrion organization / regulation of membrane potential / sarcolemma / response to estrogen / vasodilation / cellular response to xenobiotic stimulus / regulation of blood pressure / MAPK cascade / heart development / fibroblast proliferation / gene expression / defense response to virus / transmembrane transporter binding / response to hypoxia / response to xenobiotic stimulus / regulation of transcription by RNA polymerase II / negative regulation of apoptotic process / protein-containing complex binding / ATP hydrolysis activity / protein-containing complex / mitochondrion / ATP binding / identical protein binding / plasma membrane / cytoplasm 類似検索 - 分子機能 | ||||||||||||
| 生物種 | ![]() | ||||||||||||
| 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 Å | ||||||||||||
データ登録者 | Chen, L. / Ding, D. / Hou, T. | ||||||||||||
| 資金援助 | 中国, 3件
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引用 | ジャーナル: Nat Commun / 年: 2023タイトル: The inhibition mechanism of the SUR2A-containing K channel by a regulatory helix. 著者: Dian Ding / Tianyi Hou / Miao Wei / Jing-Xiang Wu / Lei Chen / ![]() 要旨: K channels are metabolic sensors for intracellular ATP/ADP ratios, play essential roles in many physiological processes, and are implicated in a spectrum of pathological conditions. SUR2A-containing ...K channels are metabolic sensors for intracellular ATP/ADP ratios, play essential roles in many physiological processes, and are implicated in a spectrum of pathological conditions. SUR2A-containing K channels differ from other subtypes in their sensitivity to Mg-ADP activation. However, the underlying structural mechanism remains poorly understood. Here we present a series of cryo-EM structures of SUR2A in the presence of different combinations of Mg-nucleotides and the allosteric inhibitor repaglinide. These structures uncover regulatory helix (R helix) on the NBD1-TMD2 linker, which wedges between NBD1 and NBD2. R helix stabilizes SUR2A in the NBD-separated conformation to inhibit channel activation. The competitive binding of Mg-ADP with Mg-ATP to NBD2 mobilizes the R helix to relieve such inhibition, allowing channel activation. The structures of SUR2B in similar conditions suggest that the C-terminal 42 residues of SUR2B enhance the structural dynamics of NBD2 and facilitate the dissociation of the R helix and the binding of Mg-ADP to NBD2, promoting NBD dimerization and subsequent channel activation. | ||||||||||||
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構造の表示
| 構造ビューア | 分子: Molmil Jmol/JSmol |
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ダウンロードとリンク
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ダウンロード
| PDBx/mmCIF形式 | 7y1j.cif.gz | 227.7 KB | 表示 | PDBx/mmCIF形式 |
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| PDB形式 | pdb7y1j.ent.gz | 175 KB | 表示 | PDB形式 |
| PDBx/mmJSON形式 | 7y1j.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
| アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/y1/7y1j ftp://data.pdbj.org/pub/pdb/validation_reports/y1/7y1j | HTTPS FTP |
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-関連構造データ
| 関連構造データ | ![]() 33563MC ![]() 7y1kC ![]() 7y1lC ![]() 7y1mC ![]() 7y1nC 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 ( |
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| 類似構造データ | 類似検索 - 機能・相同性 F&H 検索 |
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リンク
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集合体
| 登録構造単位 | ![]()
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要素
| #1: タンパク質 | 分子量: 174300.422 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() Homo sapiens (ヒト) / 参照: UniProt: Q63563 | ||||||
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| #2: 化合物 | | #3: 化合物 | #4: 化合物 | ChemComp-BJX / | 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 |
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試料調製
| 構成要素 | 名称: ATP-binding cassette sub-family C member 9, isoform A タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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| 分子量 | 値: 174 kDa/nm / 実験値: NO |
| 由来(天然) | 生物種: ![]() |
| 由来(組換発現) | 生物種: Homo sapiens (ヒト) |
| 緩衝液 | pH: 7.5 |
| 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 |
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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 / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1800 nm |
| 撮影 | 電子線照射量: 52 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) |
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解析
| ソフトウェア | 名称: PHENIX / バージョン: 1.19.2_4158: / 分類: 精密化 | ||||||||||||||||||||||||
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| EMソフトウェア | 名称: cryoSPARC / カテゴリ: 3次元再構成 | ||||||||||||||||||||||||
| CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 対称性 | 点対称性: C1 (非対称) | ||||||||||||||||||||||||
| 3次元再構成 | 解像度: 3 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 493982 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
| 拘束条件 |
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コントローラー
万見について






中国, 3件
引用








PDBj




gel filtration
Homo sapiens (ヒト)



