+検索条件
-Structure paper
| タイトル | Structural architecture of TolQ-TolR inner membrane protein complex from opportunistic pathogen . |
|---|---|
| ジャーナル・号・ページ | Sci Adv, Vol. 11, Issue 14, Page eadq9845, Year 2025 |
| 掲載日 | 2025年4月4日 |
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 / ![]() |
| PubMed 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. |
リンク | Sci Adv / PubMed:40184442 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.02 Å |
| 構造データ | EMDB-43902, PDB-9avi: |
| 由来 |
|
キーワード | MEMBRANE PROTEIN / inner membrane protein complex / Structural Genomics / Center for Structural Biology of Infectious Diseases / CSBID |
ムービー
コントローラー
構造ビューア
万見文献について



著者

リンク

acinetobacter baumannii (バクテリア)
キーワード