+検索条件
-Structure paper
| タイトル | Molecular basis for multidrug efflux by an anaerobic RND transporter. |
|---|---|
| ジャーナル・号・ページ | bioRxiv, Year 2025 |
| 掲載日 | 2025年4月5日 |
著者 | Ryan Lawrence / Mohd Athar / Muhammad R Uddin / Christopher Adams / Joana S Sousa / Oliver Durrant / Sophie Lellman / Lucy Sutton / C William Keevil / Nisha Patel / Christine Prosser / David McMillan / Helen I Zgurskaya / Attilio V Vargiu / Zainab Ahdash / Eamonn Reading |
| PubMed 要旨 | Bacteria can resist antibiotics and toxic substances within demanding ecological settings, such as low oxygen, extreme acid, and during nutrient starvation. MdtEF, a proton motive force-driven efflux ...Bacteria can resist antibiotics and toxic substances within demanding ecological settings, such as low oxygen, extreme acid, and during nutrient starvation. MdtEF, a proton motive force-driven efflux pump from the resistance-nodulation-cell division (RND) superfamily, is upregulated in these conditions but its molecular mechanism is unknown. Here, we report cryo-electron microscopy structures of Escherichia coli multidrug transporter MdtF within native-lipid nanodiscs, including a single-point mutant with an altered multidrug phenotype and associated substrate-bound form. We reveal that drug binding domain and channel conformational plasticity likely governs promiscuous substrate specificity, analogous to its closely related, constitutively expressed counterpart, AcrB. Whereas we discover distinct transmembrane state transitions within MdtF, which create a more engaged proton relay network, altered drug transport allostery and an acid-responsive increase in efflux efficiency. Physiologically, this provides means of xenobiotic and metabolite disposal within remodelled cell membranes that presage encounters with acid stresses, as endured in the gastrointestinal tract. |
リンク | bioRxiv / PubMed:40236129 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.2 - 3.56 Å |
| 構造データ | EMDB-53281, PDB-9qpr: EMDB-53282, PDB-9qps: EMDB-53283, PDB-9qpt: |
| 化合物 | ![]() ChemComp-PTY: ![]() ChemComp-D12: ![]() ChemComp-RHQ: |
| 由来 |
|
キーワード | MEMBRANE PROTEIN / multidrug / pump / anaerobic / lipid |
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









キーワード