- EMDB-50328: Single particle cryo-EM maps of AcrB wildtype monomer classes in DDM -
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基本情報
登録情報
データベース: EMDB / ID: EMD-50328
タイトル
Single particle cryo-EM maps of AcrB wildtype monomer classes in DDM
マップデータ
Monomer class 1
試料
複合体: Trimeric multidrug efflux pump subunit AcrB
タンパク質・ペプチド: Multidrug efflux pump subunit AcrB
キーワード
Drug efflux / RND transporter / TRANSPORT PROTEIN
機能・相同性
機能・相同性情報
alkane transmembrane transporter activity / alkane transport / enterobactin transport / enterobactin transmembrane transporter activity / xenobiotic detoxification by transmembrane export across the cell outer membrane / periplasmic side of plasma membrane / efflux pump complex / Iron assimilation using enterobactin / bile acid transmembrane transporter activity / Antimicrobial resistance ...alkane transmembrane transporter activity / alkane transport / enterobactin transport / enterobactin transmembrane transporter activity / xenobiotic detoxification by transmembrane export across the cell outer membrane / periplasmic side of plasma membrane / efflux pump complex / Iron assimilation using enterobactin / bile acid transmembrane transporter activity / Antimicrobial resistance / bile acid and bile salt transport / Secretion of toxins / efflux transmembrane transporter activity / xenobiotic transmembrane transporter activity / fatty acid transport / xenobiotic transport / response to toxic substance / response to xenobiotic stimulus / response to antibiotic / membrane / identical protein binding / plasma membrane 類似検索 - 分子機能
ジャーナル: Nat Commun / 年: 2025 タイトル: Conformational plasticity across phylogenetic clusters of RND multidrug efflux pumps and its impact on substrate specificity. 著者: Mariya Lazarova / Thomas Eicher / Clara Börnsen / Hui Zeng / Mohd Athar / Ui Okada / Eiki Yamashita / Inga M Spannaus / Max Borgosch / Hi-Jea Cha / Attilio V Vargiu / Satoshi Murakami / Kay ...著者: Mariya Lazarova / Thomas Eicher / Clara Börnsen / Hui Zeng / Mohd Athar / Ui Okada / Eiki Yamashita / Inga M Spannaus / Max Borgosch / Hi-Jea Cha / Attilio V Vargiu / Satoshi Murakami / Kay Diederichs / Achilleas S Frangakis / Klaas M Pos / 要旨: Antibiotic efflux plays a key role for the multidrug resistance in Gram-negative bacteria. Multidrug efflux pumps of the resistance nodulation and cell division (RND) superfamily function as part of ...Antibiotic efflux plays a key role for the multidrug resistance in Gram-negative bacteria. Multidrug efflux pumps of the resistance nodulation and cell division (RND) superfamily function as part of cell envelope spanning systems and provide resistance to diverse antibiotics. Here, we identify two phylogenetic clusters of RND proteins with conserved binding pocket residues and show that the transfer of a single conserved residue between both clusters affects the resistance phenotype not only due to changes in the physicochemical properties of the binding pocket, but also due to an altered equilibrium between the conformational states of the transport cycle. We demonstrate, using single-particle cryo-electron microscopy, that AcrB and OqxB, which represent both clusters, adopt fundamentally different apo states, implying distinct mechanisms for initial substrate binding. The observed conformational plasticity appears phylogenetically conserved and likely plays a role in the diversification of the resistance phenotype among homologous RND pumps.