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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: 9avi | ||||||
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タイトル | TolQ inner membrane protein from Acinetobacter baumannii | ||||||
![]() | Tol-Pal system protein TolQ | ||||||
![]() | MEMBRANE PROTEIN / inner membrane protein complex / Structural Genomics / Center for Structural Biology of Infectious Diseases / CSBID | ||||||
機能・相同性 | Tol-Pal system, TolQ / : / bacteriocin transport / MotA/TolQ/ExbB proton channel / MotA/TolQ/ExbB proton channel family / protein import / cell division / plasma membrane / Tol-Pal system protein TolQ![]() | ||||||
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: 3.02 Å | ||||||
![]() | Quade, B. / Otwinowski, Z. / Borek, D. / Center for Structural Biology of Infectious Diseases (CSBID) | ||||||
資金援助 | ![]()
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![]() | ![]() タイトル: Structural architecture of TolQ-TolR inner membrane protein complex from opportunistic pathogen . 著者: Elina Karimullina / Yirui Guo / Hanif M Khan / Tabitha Emde / Bradley Quade / Rosa Di Leo / Zbyszek Otwinowski / D Peter Tieleman / Dominika Borek / Alexei Savchenko / ![]() ![]() 要旨: Gram-negative bacteria harness the proton motive force (PMF) within their inner membrane (IM) to uphold cell envelope integrity, an indispensable aspect for both division and survival. The IM TolQ- ...Gram-negative bacteria harness the proton motive force (PMF) within their inner membrane (IM) to uphold cell envelope integrity, an indispensable aspect for both division and survival. The IM TolQ-TolR complex is the essential part of the Tol-Pal system, serving as a conduit for PMF energy transfer to the outer membrane. Here we present cryo-electron microscopy reconstructions of TolQ in apo and TolR-bound forms at atomic resolution. The apo TolQ configuration manifests as a symmetric pentameric pore, featuring a transmembrane funnel leading toward a cytoplasmic chamber. In contrast, the TolQ-TolR complex assumes a proton nonpermeable stance, characterized by the TolQ pentamer's flexure to accommodate the TolR dimer, where two protomers undergo a translation-based relationship. Our structure-guided analysis and simulations support the rotor-stator mechanism of action, wherein the rotation of the TolQ pentamer harmonizes with the TolR protomers' interplay. These findings broaden our mechanistic comprehension of molecular stator units empowering critical functions within the Gram-negative bacterial cell envelope. #1: ![]() タイトル: Structural architecture of TolQ-TolR inner membrane protein complex from opportunistic pathogen . 著者: Elina Karimullina / Yirui Guo / Hanif M Khan / Tabitha Emde / Bradley Quade / Rosa Di Leo / Zbyszek Otwinowski / D Tieleman Peter / Dominika Borek / Alexei Savchenko 要旨: Gram-negative bacteria harness the proton motive force (PMF) within their inner membrane (IM) to uphold the integrity of their cell envelope, an indispensable aspect for both division and survival. ...Gram-negative bacteria harness the proton motive force (PMF) within their inner membrane (IM) to uphold the integrity of their cell envelope, an indispensable aspect for both division and survival. The IM TolQ-TolR complex is the essential part of the Tol-Pal system, serving as a conduit for PMF energy transfer to the outer membrane. Here we present cryo-EM reconstructions of TolQ in apo and TolR- bound forms at atomic resolution. The apo TolQ configuration manifests as a symmetric pentameric pore, featuring a trans-membrane funnel leading towards a cytoplasmic chamber. In contrast, the TolQ-TolR complex assumes a proton non-permeable stance, characterized by the TolQ pentamer's flexure to accommodate the TolR dimer, where two protomers undergo a translation-based relationship. Our structure-guided analysis and simulations support the rotor-stator mechanism of action, wherein the rotation of the TolQ pentamer harmonizes with the TolR protomers' interplay. These findings broaden our mechanistic comprehension of molecular stator units empowering critical functions within the Gram-negative bacterial cell envelope. TEASER: Apo TolQ and TolQ-TolR structures depict structural rearrangements required for cell envelope organization in bacterial cell division. | ||||||
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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PDBx/mmCIF形式 | ![]() | 211.6 KB | 表示 | ![]() |
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PDB形式 | ![]() | 172.1 KB | 表示 | ![]() |
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その他 | ![]() |
-検証レポート
文書・要旨 | ![]() | 1 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.1 MB | 表示 | |
XML形式データ | ![]() | 47.6 KB | 表示 | |
CIF形式データ | ![]() | 65.3 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 | ![]() 43902MC 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
#1: タンパク質 | 分子量: 25390.193 Da / 分子数: 5 / 由来タイプ: 組換発現 由来: (組換発現) ![]() 遺伝子: tolQ / 発現宿主: ![]() ![]() Has protein modification | N | |
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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: TolQ inner membrane protein / タイプ: ORGANELLE OR CELLULAR COMPONENT / Entity ID: all / 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: 8 |
緩衝液成分 | 濃度: 50 mM / 名称: TRIS |
試料 | 濃度: 5.7 mg/ml / 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES / 詳細: 50mM Tris pH 8.0; 150mM NaCl; 0.5 mM TCEP |
試料支持 | グリッドの材料: GOLD / グリッドのサイズ: 300 divisions/in. / グリッドのタイプ: Quantifoil R1.2/1.3 |
急速凍結 | 装置: FEI VITROBOT MARK IV / 凍結剤: PROPANE / 湿度: 100 % / 凍結前の試料温度: 277 K |
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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 / 倍率(公称値): 105000 X / 最大 デフォーカス(公称値): 2000 nm / 最小 デフォーカス(公称値): 1 nm / C2レンズ絞り径: 70 µm |
試料ホルダ | 凍結剤: NITROGEN |
撮影 | 平均露光時間: 4.4 sec. / 電子線照射量: 100 e/Å2 / フィルム・検出器のモデル: GATAN K3 (6k x 4k) / 実像数: 2718 詳細: Images were collected as movies, with each movie containing 125 frames. The beam-image shift method, utilizing a 3x3 pattern, was used, with one image per grid hole. |
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解析
EMソフトウェア |
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画像処理 | 詳細: Patch motion and patch CTF correction with binning to 0.833 A/pixel. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CTF補正 | 詳細: Patch motion and patch CTF correction with binning to 0.833 A/pixel. タイプ: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
粒子像の選択 | 選択した粒子像数: 472724 詳細: Manual picking to generate templates. Template based autopicking to get 472724 particles. Iterative 2D classification to get 246741 particles. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
対称性 | 点対称性: C5 (5回回転対称) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3次元再構成 | 解像度: 3.02 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 215170 詳細: Map was post processed using DeepEMHancer to guide refinement. The deposited maps are pre-DeepEMHancer クラス平均像の数: 4 / 対称性のタイプ: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子モデル構築 | Source name: SwissModel / タイプ: in silico model | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化 | 解像度: 3.02→119.95 Å / Cor.coef. Fo:Fc: 0.912 / SU B: 12.521 / SU ML: 0.209 / ESU R: 0.168 立体化学のターゲット値: MAXIMUM LIKELIHOOD WITH PHASES 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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溶媒の処理 | 溶媒モデル: PARAMETERS FOR MASK CACLULATION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
原子変位パラメータ | Biso mean: 128.73 Å2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
精密化ステップ | サイクル: 1 / 合計: 1674 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
拘束条件 |
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