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-Structure paper
タイトル | Cryo-EM structures of recombinant human sodium-potassium pump determined in three different states. |
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ジャーナル・号・ページ | Nat Commun, Vol. 13, Issue 1, Page 3957, Year 2022 |
掲載日 | 2022年7月8日 |
著者 | Yingying Guo / Yuanyuan Zhang / Renhong Yan / Bangdong Huang / Fangfei Ye / Liushu Wu / Ximin Chi / Yi Shi / Qiang Zhou / |
PubMed 要旨 | Sodium-Potassium Pump (Na/K-ATPase, NKA) is an ion pump that generates an electrochemical gradient of sodium and potassium ions across the plasma membrane by hydrolyzing ATP. During each Post-Albers ...Sodium-Potassium Pump (Na/K-ATPase, NKA) is an ion pump that generates an electrochemical gradient of sodium and potassium ions across the plasma membrane by hydrolyzing ATP. During each Post-Albers cycle, NKA exchanges three cytoplasmic sodium ions for two extracellular potassium ions through alternating changes between the E1 and E2 states. Hitherto, several steps remained unknown during the complete working cycle of NKA. Here, we report cryo-electron microscopy (cryo-EM) structures of recombinant human NKA (hNKA) in three distinct states at 2.7-3.2 Å resolution, representing the E1·3Na and E1·3Na·ATP states with cytosolic gates open and the basic E2·[2K] state, respectively. This work provides the insights into the cytoplasmic Na entrance pathway and the mechanism of cytoplasmic gate closure coupled with ATP hydrolysis, filling crucial gaps in the structural elucidation of the Post-Albers cycle of NKA. |
リンク | Nat Commun / PubMed:35803952 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.7 - 3.2 Å |
構造データ | EMDB-30947, PDB-7e1z: EMDB-30948, PDB-7e20: EMDB-30949, PDB-7e21: |
化合物 | ChemComp-NA: ChemComp-MG: ChemComp-Y01: ChemComp-PC1: ChemComp-NAG: ChemComp-HOH: ChemComp-K: ChemComp-AGS: |
由来 |
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キーワード | MEMBRANE PROTEIN / Na+ / K+-ATPase |