+データを開く
-基本情報
登録情報 | データベース: PDB / ID: 6uvt | |||||||||
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タイトル | Human Connexin-26 (Low pH closed conformation) | |||||||||
要素 | Gap junction beta-2 protein | |||||||||
キーワード | MEMBRANE PROTEIN / gap junction channel | |||||||||
機能・相同性 | 機能・相同性情報 Transport of connexons to the plasma membrane / response to human chorionic gonadotropin / gap junction-mediated intercellular transport / gap junction channel activity involved in cell communication by electrical coupling / epididymis development / Oligomerization of connexins into connexons / Transport of connexins along the secretory pathway / gap junction assembly / connexin complex / gap junction ...Transport of connexons to the plasma membrane / response to human chorionic gonadotropin / gap junction-mediated intercellular transport / gap junction channel activity involved in cell communication by electrical coupling / epididymis development / Oligomerization of connexins into connexons / Transport of connexins along the secretory pathway / gap junction assembly / connexin complex / gap junction / astrocyte projection / Gap junction assembly / gap junction channel activity / endoplasmic reticulum-Golgi intermediate compartment / inner ear development / decidualization / lateral plasma membrane / response to retinoic acid / cellular response to glucagon stimulus / cellular response to dexamethasone stimulus / response to ischemia / response to progesterone / sensory perception of sound / transmembrane transport / cell-cell signaling / response to estradiol / cellular response to oxidative stress / cell body / response to lipopolysaccharide / calcium ion binding / perinuclear region of cytoplasm / identical protein binding / 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: 7.5 Å | |||||||||
データ登録者 | Khan, A.K. / Jagielnicki, M. / Purdy, M.D. / Yeager, M. | |||||||||
資金援助 | 米国, 2件
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引用 | ジャーナル: Cell Rep / 年: 2020 タイトル: A Steric "Ball-and-Chain" Mechanism for pH-Mediated Regulation of Gap Junction Channels. 著者: Ali K Khan / Maciej Jagielnicki / William E McIntire / Michael D Purdy / Venkatasubramanian Dharmarajan / Patrick R Griffin / Mark Yeager / 要旨: Gap junction channels (GJCs) mediate intercellular communication and are gated by numerous conditions such as pH. The electron cryomicroscopy (cryo-EM) structure of Cx26 GJC at physiological pH ...Gap junction channels (GJCs) mediate intercellular communication and are gated by numerous conditions such as pH. The electron cryomicroscopy (cryo-EM) structure of Cx26 GJC at physiological pH recapitulates previous GJC structures in lipid bilayers. At pH 6.4, we identify two conformational states, one resembling the open physiological-pH structure and a closed conformation that displays six threads of density, that join to form a pore-occluding density. Crosslinking and hydrogen-deuterium exchange mass spectrometry reveal closer association between the N-terminal (NT) domains and the cytoplasmic loops (CL) at acidic pH. Previous electrophysiologic studies suggest an association between NT residue N14 and H100 near M2, which may trigger the observed movement of M2 toward M1 in our cryo-EM maps, thereby accounting for additional NT-CL crosslinks at acidic pH. We propose that these pH-induced interactions and conformational changes result in extension, ordering, and association of the acetylated NT domains to form a hexameric "ball-and-chain" gating particle. | |||||||||
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 | 6uvt.cif.gz | 357.2 KB | 表示 | PDBx/mmCIF形式 |
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PDB形式 | pdb6uvt.ent.gz | 248.1 KB | 表示 | PDB形式 |
PDBx/mmJSON形式 | 6uvt.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 | 6uvt_validation.pdf.gz | 817.7 KB | 表示 | wwPDB検証レポート |
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文書・詳細版 | 6uvt_full_validation.pdf.gz | 817.8 KB | 表示 | |
XML形式データ | 6uvt_validation.xml.gz | 43.4 KB | 表示 | |
CIF形式データ | 6uvt_validation.cif.gz | 68.2 KB | 表示 | |
アーカイブディレクトリ | https://data.pdbj.org/pub/pdb/validation_reports/uv/6uvt ftp://data.pdbj.org/pub/pdb/validation_reports/uv/6uvt | 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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1 |
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-要素
#1: タンパク質 | 分子量: 26214.945 Da / 分子数: 12 / 変異: C211S, C218S / 由来タイプ: 組換発現 / 由来: (組換発現) Homo sapiens (ヒト) / 遺伝子: GJB2 発現宿主: Spodoptera frugiperda (ツマジロクサヨトウ) 参照: UniProt: P29033 |
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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 |
-試料調製
構成要素 | 名称: Connexin-26 Gap Junction Channel / タイプ: ORGANELLE OR CELLULAR COMPONENT / Entity ID: all / 由来: RECOMBINANT | ||||||||||||||||||||
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分子量 | 値: 326 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: Spodoptera frugiperda (ツマジロクサヨトウ) | ||||||||||||||||||||
緩衝液 | pH: 6.4 詳細: NaCl was diluted from 1 M to 200 mM immediately before freezing. HEPES pH 7.5 buffer was diluted with MES pH 6.0 buffer thus adjusting pH to 6.4. | ||||||||||||||||||||
緩衝液成分 |
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試料 | 濃度: 0.6 mg/ml / 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 詳細: After application of sample to the C-flat holey carbon grid, sample was blotted with Whatman no. 1 filter paper for ~4s, blot force of 3, and 100 % humidity at 22oC. |
-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: SPOT SCAN |
電子レンズ | モード: BRIGHT FIELD / 倍率(公称値): 130000 X / Cs: 2.7 mm |
撮影 | 平均露光時間: 10 sec. / 電子線照射量: 45 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) 撮影したグリッド数: 1 |
電子光学装置 | エネルギーフィルター名称: GIF Quantum LS / エネルギーフィルタースリット幅: 20 eV |
画像スキャン | 動画フレーム数/画像: 25 |
-解析
EMソフトウェア |
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CTF補正 | タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 49952 | ||||||||||||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: D6 (2回x6回 2面回転対称) | ||||||||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 7.5 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 22805 / 対称性のタイプ: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | プロトコル: OTHER / 空間: REAL / Target criteria: Model-map cross correlation 詳細: Initial local fitting was done using UCSF Chimera. Multiple rounds of automated (Phenix) and manual (Coot) model building were performed. The model was validated in Molprobity(part of Phenix ...詳細: Initial local fitting was done using UCSF Chimera. Multiple rounds of automated (Phenix) and manual (Coot) model building were performed. The model was validated in Molprobity(part of Phenix package). Model-map cross correlation score as well as EMRinger score were obtained in Phenix. RMSD values for C-alphas were calculated in UCSF Chimera. |