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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: 7z23 | ||||||
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タイトル | Connexin43 hemi channel in nanodisc | ||||||
![]() | Gap junction alpha-1 protein | ||||||
![]() | MEMBRANE PROTEIN / gap junction channel / connexin / cell communication | ||||||
機能・相同性 | ![]() gap junction channel activity involved in cardiac conduction electrical coupling / negative regulation of gonadotropin secretion / positive regulation of striated muscle tissue development / milk ejection reflex / positive regulation of morphogenesis of an epithelium / positive regulation of mesodermal cell differentiation / atrial ventricular junction remodeling / cell communication by chemical coupling / cell communication by electrical coupling / neuroblast migration ...gap junction channel activity involved in cardiac conduction electrical coupling / negative regulation of gonadotropin secretion / positive regulation of striated muscle tissue development / milk ejection reflex / positive regulation of morphogenesis of an epithelium / positive regulation of mesodermal cell differentiation / atrial ventricular junction remodeling / cell communication by chemical coupling / cell communication by electrical coupling / neuroblast migration / columnar/cuboidal epithelial cell maturation / negative regulation of trophoblast cell migration / microtubule-based transport / gap junction hemi-channel activity / monoatomic ion transmembrane transporter activity / regulation of bone remodeling / SARS-CoV-2 targets PDZ proteins in cell-cell junction / gap junction channel activity involved in cell communication by electrical coupling / regulation of ventricular cardiac muscle cell membrane depolarization / contractile muscle fiber / Oligomerization of connexins into connexons / Transport of connexins along the secretory pathway / glutathione transmembrane transporter activity / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / gap junction assembly / atrial cardiac muscle cell action potential / Regulation of gap junction activity / cardiac conduction system development / regulation of atrial cardiac muscle cell membrane depolarization / cellular response to pH / connexin complex / fascia adherens / gap junction / cell-cell contact zone / Formation of annular gap junctions / Golgi-associated vesicle membrane / cell communication by electrical coupling involved in cardiac conduction / Gap junction degradation / bone remodeling / skeletal muscle tissue regeneration / gap junction channel activity / Gap junction assembly / regulation of bone mineralization / export across plasma membrane / adult heart development / regulation of ventricular cardiac muscle cell membrane repolarization / tight junction / glutamate secretion / blood vessel morphogenesis / lens development in camera-type eye / intermediate filament / xenobiotic transport / Mechanical load activates signaling by PIEZO1 and integrins in osteocytes / embryonic digit morphogenesis / maintenance of blood-brain barrier / positive regulation of stem cell proliferation / beta-tubulin binding / RHOJ GTPase cycle / RHOQ GTPase cycle / heart looping / establishment of mitotic spindle orientation / efflux transmembrane transporter activity / intercalated disc / alpha-tubulin binding / lateral plasma membrane / T cell proliferation / positive regulation of vascular associated smooth muscle cell proliferation / tubulin binding / protein tyrosine kinase binding / negative regulation of cell growth / beta-catenin binding / bone development / cellular response to amyloid-beta / male gonad development / neuron migration / osteoblast differentiation / cell junction / intracellular protein localization / cell-cell signaling / positive regulation of cold-induced thermogenesis / heart development / scaffold protein binding / monoatomic ion transmembrane transport / spermatogenesis / in utero embryonic development / positive regulation of canonical NF-kappaB signal transduction / apical plasma membrane / membrane raft / Golgi membrane / signaling receptor binding / negative regulation of gene expression / focal adhesion / intracellular membrane-bounded organelle / positive regulation of gene expression / endoplasmic reticulum membrane / Golgi apparatus / signal transduction / mitochondrion / nucleoplasm / nucleus 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: 3.98 Å | ||||||
![]() | Qi, C. / Korkhov, M.V. | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structure of the connexin-43 gap junction channel in a putative closed state. 著者: Chao Qi / Silvia Acosta Gutierrez / Pia Lavriha / Alaa Othman / Diego Lopez-Pigozzi / Erva Bayraktar / Dina Schuster / Paola Picotti / Nicola Zamboni / Mario Bortolozzi / Francesco Luigi ...著者: Chao Qi / Silvia Acosta Gutierrez / Pia Lavriha / Alaa Othman / Diego Lopez-Pigozzi / Erva Bayraktar / Dina Schuster / Paola Picotti / Nicola Zamboni / Mario Bortolozzi / Francesco Luigi Gervasio / Volodymyr M Korkhov / ![]() ![]() ![]() ![]() 要旨: Gap junction channels (GJCs) mediate intercellular communication by connecting two neighbouring cells and enabling direct exchange of ions and small molecules. Cell coupling via connexin-43 (Cx43) ...Gap junction channels (GJCs) mediate intercellular communication by connecting two neighbouring cells and enabling direct exchange of ions and small molecules. Cell coupling via connexin-43 (Cx43) GJCs is important in a wide range of cellular processes in health and disease (Churko and Laird, 2013; Liang et al., 2020; Poelzing and Rosenbaum, 2004), yet the structural basis of Cx43 function and regulation has not been determined until now. Here, we describe the structure of a human Cx43 GJC solved by cryo-EM and single particle analysis at 2.26 Å resolution. The pore region of Cx43 GJC features several lipid-like densities per Cx43 monomer, located close to a putative lateral access site at the monomer boundary. We found a previously undescribed conformation on the cytosolic side of the pore, formed by the N-terminal domain and the transmembrane helix 2 of Cx43 and stabilized by a small molecule. Structures of the Cx43 GJC and hemichannels (HCs) in nanodiscs reveal a similar gate arrangement. The features of the Cx43 GJC and HC cryo-EM maps and the channel properties revealed by molecular dynamics simulations suggest that the captured states of Cx43 are consistent with a closed state. | ||||||
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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 | ![]() | 220.2 KB | 表示 | ![]() |
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PDB形式 | ![]() | 172.5 KB | 表示 | ![]() |
PDBx/mmJSON形式 | ![]() | ツリー表示 | ![]() | |
その他 | ![]() |
-検証レポート
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
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-関連構造データ
関連構造データ | ![]() 14456MC ![]() 7z1tC ![]() 7z22C C: 同じ文献を引用 ( M: このデータのモデリングに利用したマップデータ |
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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
#1: タンパク質 | 分子量: 43061.336 Da / 分子数: 6 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() ![]() Has protein modification | Y | |
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-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: Connexin43 gap junction channel / タイプ: COMPLEX / Entity ID: all / 由来: RECOMBINANT |
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分子量 | 値: 43 kDa/nm / 実験値: YES |
由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() |
緩衝液 | pH: 8 |
試料 | 濃度: 5 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 |
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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: ![]() |
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): 1000 nm |
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) |
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: EPU / バージョン: 2 / カテゴリ: 画像取得 |
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CTF補正 | タイプ: NONE |
3次元再構成 | 解像度: 3.98 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 20526 / 対称性のタイプ: POINT |