- EMDB-38479: Cryo-EM structure of human ZnT1 WT, in the presence of zinc, dete... -
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データベース: EMDB / ID: EMD-38479
タイトル
Cryo-EM structure of human ZnT1 WT, in the presence of zinc, determined in heterogeneous conformations- one subunit in an inward-facing and the other in an outward-facing conformation
Human ZnT1 / Zinc transpoter / Heterogenous dimeric conformation / TRANSPORT PROTEIN
機能・相同性
機能・相同性情報
negative regulation of zinc ion transmembrane import / glutamatergic postsynaptic density / zinc export across plasma membrane / detoxification of zinc ion / zinc ion import into organelle / detoxification of cadmium ion / zinc:proton antiporter activity / Zinc efflux and compartmentalization by the SLC30 family / cadmium ion transmembrane transport / negative regulation of calcium ion import ...negative regulation of zinc ion transmembrane import / glutamatergic postsynaptic density / zinc export across plasma membrane / detoxification of zinc ion / zinc ion import into organelle / detoxification of cadmium ion / zinc:proton antiporter activity / Zinc efflux and compartmentalization by the SLC30 family / cadmium ion transmembrane transport / negative regulation of calcium ion import / regulation of postsynaptic density protein 95 clustering / zinc ion transport / zinc ion transmembrane transporter activity / negative regulation of neurotransmitter secretion / zinc ion transmembrane transport / positive regulation of dendritic spine morphogenesis / intracellular zinc ion homeostasis / calcium ion import / postsynaptic density, intracellular component / calcium channel inhibitor activity / T-tubule / cytoplasmic vesicle membrane / postsynaptic density membrane / Schaffer collateral - CA1 synapse / intracellular calcium ion homeostasis / nuclear membrane / basolateral plasma membrane / in utero embryonic development / defense response to bacterium / Golgi membrane / dendrite / endoplasmic reticulum membrane / endoplasmic reticulum / Golgi apparatus / metal ion binding / membrane / plasma membrane / cytoplasm 類似検索 - 分子機能
National Natural Science Foundation of China (NSFC)
32171194
中国
引用
ジャーナル: EMBO Rep / 年: 2024 タイトル: Structural insights into human zinc transporter ZnT1 mediated Zn efflux. 著者: Yonghui Long / Zhini Zhu / Zixuan Zhou / Chuanhui Yang / Yulin Chao / Yuwei Wang / Qingtong Zhou / Ming-Wei Wang / Qianhui Qu / 要旨: Zinc transporter 1 (ZnT1), the principal carrier of cytosolic zinc to the extracellular milieu, is important for cellular zinc homeostasis and resistance to zinc toxicity. Despite recent advancements ...Zinc transporter 1 (ZnT1), the principal carrier of cytosolic zinc to the extracellular milieu, is important for cellular zinc homeostasis and resistance to zinc toxicity. Despite recent advancements in the structural characterization of various zinc transporters, the mechanism by which ZnTs-mediated Zn translocation is coupled with H or Ca remains unclear. To visualize the transport dynamics, we determined the cryo-electron microscopy (cryo-EM) structures of human ZnT1 at different functional states. ZnT1 dimerizes via extensive interactions between the cytosolic (CTD), the transmembrane (TMD), and the unique cysteine-rich extracellular (ECD) domains. At pH 7.5, both protomers adopt an outward-facing (OF) conformation, with Zn ions coordinated at the TMD binding site by distinct compositions. At pH 6.0, ZnT1 complexed with Zn exhibits various conformations [OF/OF, OF/IF (inward-facing), and IF/IF]. These conformational snapshots, together with biochemical investigation and molecular dynamic simulations, shed light on the mechanism underlying the proton-dependence of ZnT1 transport.
解像度のタイプ: BY AUTHOR / 解像度: 4.18 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 使用した粒子像数: 97466
初期 角度割当
タイプ: ANGULAR RECONSTITUTION
最終 角度割当
タイプ: ANGULAR RECONSTITUTION
FSC曲線 (解像度の算出)
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原子モデル構築 1
精密化
空間: REAL / プロトコル: RIGID BODY FIT
得られたモデル
PDB-8xmj: Cryo-EM structure of human ZnT1 WT, in the presence of zinc, determined in heterogeneous conformations- one subunit in an inward-facing and the other in an outward-facing conformation