- EMDB-36077: Cyro-EM structure of the Na+/H+ antipoter SOS1 from Arabidopsis t... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-36077
タイトル
Cyro-EM structure of the Na+/H+ antipoter SOS1 from Arabidopsis thaliana,class1
マップデータ
試料
複合体: Homodimer of AtSOS1
タンパク質・ペプチド: Na+/H+ antipoter SOS1 from Arabidopsis thaliana
キーワード
Sodium / Proton / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
sodium:proton antiporter activity / chloroplast envelope / regulation of reactive oxygen species metabolic process / sodium ion transport / response to salt stress / potassium ion transmembrane transport / response to reactive oxygen species / response to hydrogen peroxide / response to oxidative stress / plasma membrane 類似検索 - 分子機能
National Natural Science Foundation of China (NSFC)
中国
引用
ジャーナル: Nat Plants / 年: 2023 タイトル: Structural basis for the activity regulation of Salt Overly Sensitive 1 in Arabidopsis salt tolerance. 著者: Yanming Zhang / Jiaqi Zhou / Xuping Ni / Qinrui Wang / Yutian Jia / Xia Xu / Haoyang Wu / Peng Fu / Han Wen / Yan Guo / Guanghui Yang / 要旨: The plasma membrane Na/H exchanger Salt Overly Sensitive 1 (SOS1) is crucial for plant salt tolerance. Unlike typical sodium/proton exchangers, SOS1 contains a large cytoplasmic domain (CPD) that ...The plasma membrane Na/H exchanger Salt Overly Sensitive 1 (SOS1) is crucial for plant salt tolerance. Unlike typical sodium/proton exchangers, SOS1 contains a large cytoplasmic domain (CPD) that regulates Na/H exchange activity. However, the underlying modulation mechanism remains unclear. Here we report the structures of SOS1 from Arabidopsis thaliana in two conformations, primarily differing in CPD flexibility. The CPD comprises an interfacial domain, a cyclic nucleotide-binding domain-like domain (CNBD-like domain) and an autoinhibition domain. Through yeast cell-based Na tolerance test, we reveal the regulatory role of the interfacial domain and the activation role of the CNBD-like domain. The CPD forms a negatively charged cavity that is connected to the ion binding site. The transport of Na may be coupled with the conformational change of CPD. These findings provide structural and functional insight into SOS1 activity regulation.