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データを開く
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基本情報
登録情報 | データベース: PDB / ID: 9bqh | |||||||||||||||||||||||||||||||||
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タイトル | Cryo-EM structure of the full-length human P2X4 receptor in the apo closed state | |||||||||||||||||||||||||||||||||
![]() | P2X purinoceptor 4 | |||||||||||||||||||||||||||||||||
![]() | MEMBRANE PROTEIN / Ion Channel / Ligand-gated Ion Channel / P2X Receptor / Allosteric Antagonist | |||||||||||||||||||||||||||||||||
機能・相同性 | ![]() Platelet homeostasis / sensory perception of touch / positive regulation of microglial cell migration / purinergic nucleotide receptor signaling pathway / extracellularly ATP-gated monoatomic cation channel activity / purinergic nucleotide receptor activity / negative regulation of cardiac muscle hypertrophy / ligand-gated calcium channel activity / Elevation of cytosolic Ca2+ levels / positive regulation of prostaglandin secretion ...Platelet homeostasis / sensory perception of touch / positive regulation of microglial cell migration / purinergic nucleotide receptor signaling pathway / extracellularly ATP-gated monoatomic cation channel activity / purinergic nucleotide receptor activity / negative regulation of cardiac muscle hypertrophy / ligand-gated calcium channel activity / Elevation of cytosolic Ca2+ levels / positive regulation of prostaglandin secretion / regulation of chemotaxis / response to fluid shear stress / tissue homeostasis / positive regulation of calcium ion transport / relaxation of cardiac muscle / positive regulation of endothelial cell chemotaxis / endothelial cell activation / response to ATP / cellular response to ATP / cellular response to zinc ion / positive regulation of calcium ion transport into cytosol / behavioral response to pain / membrane depolarization / positive regulation of blood vessel endothelial cell migration / regulation of cardiac muscle contraction / response to axon injury / Purinergic signaling in leishmaniasis infection / regulation of sodium ion transport / sensory perception of pain / positive regulation of calcium-mediated signaling / response to ischemia / apoptotic signaling pathway / calcium-mediated signaling / calcium ion transmembrane transport / regulation of blood pressure / positive regulation of nitric oxide biosynthetic process / cell junction / cell body / monoatomic ion transmembrane transport / positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction / postsynapse / cadherin binding / copper ion binding / signaling receptor binding / lysosomal membrane / perinuclear region of cytoplasm / signal transduction / extracellular exosome / zinc ion binding / ATP binding / identical protein binding / membrane / plasma membrane 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: 2.27 Å | |||||||||||||||||||||||||||||||||
![]() | Shi, H. / Ditter, I.A. / Oken, A.C. / Mansoor, S.E. | |||||||||||||||||||||||||||||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Human P2X4 receptor gating is modulated by a stable cytoplasmic cap and a unique allosteric pocket. 著者: Haoyuan Shi / Ismayn A Ditter / Adam C Oken / Steven E Mansoor / ![]() 要旨: P2X receptors (P2XRs) are adenosine 5'-triphosphate (ATP)-gated ion channels comprising homomeric and heteromeric trimers of seven subtypes (P2X1-P2X7) that confer different rates of desensitization. ...P2X receptors (P2XRs) are adenosine 5'-triphosphate (ATP)-gated ion channels comprising homomeric and heteromeric trimers of seven subtypes (P2X1-P2X7) that confer different rates of desensitization. The helical recoil model of P2XR desensitization proposes stability of the cytoplasmic cap sets the rate of desensitization, but timing of its formation is unclear for slow-desensitizing P2XRs. We report cryo-electron microscopy structures of full-length wild-type human P2X4 receptor in apo closed, antagonist-bound inhibited, and ATP-bound desensitized states. Because the apo closed and antagonist-bound inhibited state structures of this slow-desensitizing P2XR include an intact cytoplasmic cap while the ATP-bound desensitized state structure does not, the cytoplasmic cap is formed before agonist binding. Furthermore, structural and functional data suggest the cytoplasmic cap is stabilized by lipids to modulate desensitization, and P2X4 is modified by glycosylation and palmitoylation. Last, our antagonist-bound inhibited state structure reveals features specific to the allosteric ligand-binding pocket in human receptors that facilitates development of small-molecule modulators. | |||||||||||||||||||||||||||||||||
履歴 |
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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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 | ![]() | 398.6 KB | 表示 | ![]() |
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PDB形式 | ![]() | 334.5 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 2 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 2 MB | 表示 | |
XML形式データ | ![]() | 58.2 KB | 表示 | |
CIF形式データ | ![]() | 87.3 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
関連構造データ | ![]() 44799MC ![]() 9bqiC ![]() 9c48C 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 ![]() |
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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
-タンパク質 / 非ポリマー , 2種, 393分子 ABC

#1: タンパク質 | 分子量: 43415.000 Da / 分子数: 3 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() #6: 水 | ChemComp-HOH / | |
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-糖 , 4種, 24分子 


#2: 多糖 | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose #3: 多糖 | #4: 糖 | ChemComp-NAG / #5: 糖 | ChemComp-LMT / |
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-詳細
研究の焦点であるリガンドがあるか | Y |
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Has protein modification | 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: Membrane protein / タイプ: COMPLEX / Entity ID: #1 / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() |
緩衝液 | pH: 7 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 装置: FEI VITROBOT MARK IV / 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: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 130000 X / 最大 デフォーカス(公称値): 1500 nm / 最小 デフォーカス(公称値): 900 nm / Cs: 2.7 mm / C2レンズ絞り径: 50 µm |
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: 43 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 実像数: 15582 |
電子光学装置 | エネルギーフィルタースリット幅: 20 eV |
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解析
EMソフトウェア | 名称: PHENIX / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
対称性 | 点対称性: C3 (3回回転対称) | ||||||||||||||||||||||||
3次元再構成 | 解像度: 2.27 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 627118 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
拘束条件 |
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