+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 7y1m | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
タイトル | Structure of SUR2B in complex with Mg-ATP, Mg-ADP, and repaglinide in the inward-facing conformation | ||||||||||||
要素 | Isoform SUR2B of ATP-binding cassette sub-family C member 9 | ||||||||||||
キーワード | MEMBRANE PROTEIN / SUR2B / 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 / response to decreased oxygen levels / ATP sensitive Potassium channels / response to peptide / ABC-family proteins mediated transport / 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 / response to decreased oxygen levels / ATP sensitive Potassium channels / response to peptide / ABC-family proteins mediated transport / inward rectifying potassium channel / sulfonylurea receptor activity / response to hydrogen sulfide / response to potassium ion / cardiac conduction / circulatory system development / response to oxygen levels / cellular response to potassium ion / coronary vasculature development / ATPase-coupled monoatomic cation transmembrane transporter activity / cellular response to chemical stress / cardiac muscle cell contraction / regulation of potassium ion transmembrane transport / inorganic cation transmembrane transport / blood circulation / syntaxin binding / cellular respiration / response to stress / heterocyclic compound binding / cellular response to ATP / Ion homeostasis / response to ATP / action potential / blood vessel development / potassium ion import across plasma membrane / monoatomic cation transmembrane transport / fatty acid oxidation / ATPase-coupled transmembrane transporter activity / potassium channel activity / ABC-type transporter activity / potassium channel regulator activity / heart morphogenesis / ATP metabolic process / skeletal muscle tissue development / T-tubule / potassium ion transmembrane transport / negative regulation of blood pressure / sarcomere / cellular response to calcium ion / blood vessel diameter maintenance / acrosomal vesicle / regulation of membrane potential / response to activity / mitochondrion organization / potassium ion transport / response to hydrogen peroxide / transmembrane transport / sarcolemma / regulation of blood pressure / response to estrogen / vasodilation / MAPK cascade / cellular response to xenobiotic stimulus / heart development / gene expression / fibroblast proliferation / defense response to virus / transmembrane transporter binding / response to hypoxia / response to xenobiotic stimulus / protein-containing complex binding / negative regulation of apoptotic process / regulation of transcription by RNA polymerase II / ATP hydrolysis activity / protein-containing complex / mitochondrion / ATP binding / identical protein binding / membrane / plasma membrane / cytoplasm 類似検索 - 分子機能 | ||||||||||||
生物種 | Rattus norvegicus (ドブネズミ) | ||||||||||||
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: 3.57 Å | ||||||||||||
データ登録者 | Chen, L. / Ding, D. / Hou, T. | ||||||||||||
資金援助 | 中国, 3件
| ||||||||||||
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. | ||||||||||||
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 | 7y1m.cif.gz | 220.9 KB | 表示 | PDBx/mmCIF形式 |
---|---|---|---|---|
PDB形式 | pdb7y1m.ent.gz | 167.3 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 7y1m.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 | 7y1m_validation.pdf.gz | 1.4 MB | 表示 | wwPDB検証レポート |
---|---|---|---|---|
文書・詳細版 | 7y1m_full_validation.pdf.gz | 1.4 MB | 表示 | |
XML形式データ | 7y1m_validation.xml.gz | 43.4 KB | 表示 | |
CIF形式データ | 7y1m_validation.cif.gz | 62.9 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/y1/7y1m ftp://data.pdbj.org/pub/pdb/validation_reports/y1/7y1m | HTTPS FTP |
-関連構造データ
関連構造データ | 33566MC 7y1jC 7y1kC 7y1lC 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 (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: 174488.562 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) Rattus norvegicus (ドブネズミ) / 遺伝子: Abcc9, Sur2 / 発現宿主: Homo sapiens (ヒト) / 参照: UniProt: Q63563 | ||||||||
---|---|---|---|---|---|---|---|---|---|
#2: 化合物 | #3: 化合物 | ChemComp-ATP / | #4: 化合物 | ChemComp-BJX / | #5: 化合物 | ChemComp-ADP / | 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: ATP-binding cassette sub-family C member 9, isoform B タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
---|---|
分子量 | 値: 174 kDa/nm / 実験値: NO |
由来(天然) | 生物種: Rattus norvegicus (ドブネズミ) |
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 |
-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 / 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) |
-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 | ||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.57 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 83595 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
|