Article
Open-state structure and pore gating mechanism of the cardiac sodium channel.
Cell - 30 Sept 2021
Jiang Daohua, Banh Richard, Gamal El-Din Tamer M, Tonggu Lige, Lenaeus Michael J, Pomès Régis, Zheng Ning, Catterall William A
Abstract excerpt
The heartbeat is initiated by voltage-gated sodium channel NaV1.5, which opens rapidly and triggers the cardiac action potential; however, the structural basis for pore opening remains unknown. Here, we blocked fast inactivation with a mutation and captured the elusive open-state structure. The fast inactivation gate moves away from its receptor, allowing asymmetric opening of pore-lining S6 segments, which bend...
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