: / monoatomic ion transmembrane transporter activity / antiporter activity / inorganic cation transmembrane transport / monoatomic cation transmembrane transporter activity / sodium ion transport / NADH dehydrogenase (ubiquinone) activity / ATP synthesis coupled electron transport / monoatomic ion transport / proton transmembrane transport ...: / monoatomic ion transmembrane transporter activity / antiporter activity / inorganic cation transmembrane transport / monoatomic cation transmembrane transporter activity / sodium ion transport / NADH dehydrogenase (ubiquinone) activity / ATP synthesis coupled electron transport / monoatomic ion transport / proton transmembrane transport / membrane => GO:0016020 / 細胞膜 類似検索 - 分子機能
Monovalent cation proton antiporter subunit A / Na+/H+ antiporter subunit E / Na+/H+ antiporter subunit G / Na+/H+ antiporter MnhB subunit-related protein / Na(+)/H(+) antiporter subunit F-like / MrpA C-terminal/MbhD / Na+/H+ ion antiporter subunit / Na+/H+ antiporter subunit / Domain related to MnhB subunit of Na+/H+ antiporter / Multiple resistance and pH regulation protein F (MrpF / PhaF) ...Monovalent cation proton antiporter subunit A / Na+/H+ antiporter subunit E / Na+/H+ antiporter subunit G / Na+/H+ antiporter MnhB subunit-related protein / Na(+)/H(+) antiporter subunit F-like / MrpA C-terminal/MbhD / Na+/H+ ion antiporter subunit / Na+/H+ antiporter subunit / Domain related to MnhB subunit of Na+/H+ antiporter / Multiple resistance and pH regulation protein F (MrpF / PhaF) / MBH, subunit D / NADH-Ubiquinone oxidoreductase (complex I), chain 5 N-terminal / NADH-Ubiquinone oxidoreductase (complex I), chain 5 N-terminus / NADH-ubiquinone oxidoreductase chain 4L/Mnh complex subunit C1-like / NADH-ubiquinone/plastoquinone oxidoreductase chain 4L / NADH:ubiquinone oxidoreductase / NADH:quinone oxidoreductase/Mrp antiporter, membrane subunit / Proton-conducting membrane transporter 類似検索 - ドメイン・相同性
Na+/H+ antiporter subunit D / Na+/H+ antiporter subunit E / Na+/H+ antiporter subunit G1 / Na(+)/H(+) antiporter subunit B / Na+/H+ antiporter subunit A / Na(+)/H(+) antiporter subunit F / Na(+)/H(+) antiporter subunit C 類似検索 - 構成要素
ジャーナル: Nat Commun / 年: 2022 タイトル: Ion transfer mechanisms in Mrp-type antiporters from high resolution cryoEM and molecular dynamics simulations. 著者: Yongchan Lee / Outi Haapanen / Anton Altmeyer / Werner Kühlbrandt / Vivek Sharma / Volker Zickermann / 要旨: Multiple resistance and pH adaptation (Mrp) cation/proton antiporters are essential for growth of a variety of halophilic and alkaliphilic bacteria under stress conditions. Mrp-type antiporters are ...Multiple resistance and pH adaptation (Mrp) cation/proton antiporters are essential for growth of a variety of halophilic and alkaliphilic bacteria under stress conditions. Mrp-type antiporters are closely related to the membrane domain of respiratory complex I. We determined the structure of the Mrp antiporter from Bacillus pseudofirmus by electron cryo-microscopy at 2.2 Å resolution. The structure resolves more than 99% of the sidechains of the seven membrane subunits MrpA to MrpG plus 360 water molecules, including ~70 in putative ion translocation pathways. Molecular dynamics simulations based on the high-resolution structure revealed details of the antiport mechanism. We find that switching the position of a histidine residue between three hydrated pathways in the MrpA subunit is critical for proton transfer that drives gated trans-membrane sodium translocation. Several lines of evidence indicate that the same histidine-switch mechanism operates in respiratory complex I.