- EMDB-53281: Single particle cryo-EM structure of the multidrug efflux pump Md... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-53281
タイトル
Single particle cryo-EM structure of the multidrug efflux pump MdtF from Escherichia coli
マップデータ
試料
複合体: Homotrimer of WT multidrug resistance protein MdtF in SMALP nanodisc
タンパク質・ペプチド: Multidrug resistance protein MdtF
リガンド: PHOSPHATIDYLETHANOLAMINE
リガンド: DODECANE
キーワード
multidrug / pump / anaerobic / lipid / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
xenobiotic transmembrane transport / bile acid transmembrane transporter activity / xenobiotic transport / bile acid and bile salt transport / efflux transmembrane transporter activity / xenobiotic transmembrane transporter activity / response to toxic substance / response to antibiotic / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能
Biotechnology and Biological Sciences Research Council (BBSRC)
BB/T008709/1
英国
引用
ジャーナル: bioRxiv / 年: 2025 タイトル: Molecular basis for multidrug efflux by an anaerobic RND transporter. 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 ...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 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.
全体 : Homotrimer of WT multidrug resistance protein MdtF in SMALP nanodisc
全体
名称: Homotrimer of WT multidrug resistance protein MdtF in SMALP nanodisc
要素
複合体: Homotrimer of WT multidrug resistance protein MdtF in SMALP nanodisc
タンパク質・ペプチド: Multidrug resistance protein MdtF
リガンド: PHOSPHATIDYLETHANOLAMINE
リガンド: DODECANE
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超分子 #1: Homotrimer of WT multidrug resistance protein MdtF in SMALP nanodisc
超分子
名称: Homotrimer of WT multidrug resistance protein MdtF in SMALP nanodisc タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1
由来(天然)
生物種: Escherichia coli K-12 (大腸菌)
分子量
理論値: 334.551 KDa
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分子 #1: Multidrug resistance protein MdtF
分子
名称: Multidrug resistance protein MdtF / タイプ: protein_or_peptide / ID: 1 詳細: MdtF protein with a C-terminal 6x His (hexahistidine) tag, separated by a linker sequence including a TEV cleavage site コピー数: 3 / 光学異性体: LEVO