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-Structure paper
タイトル | Cryo-EM structure of human voltage-gated sodium channel Na1.6. |
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ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 120, Issue 5, Page e2220578120, Year 2023 |
掲載日 | 2023年1月31日 |
![]() | Xiao Fan / Jian Huang / Xueqin Jin / Nieng Yan / ![]() ![]() |
PubMed 要旨 | Voltage-gated sodium channel Na1.6 plays a crucial role in neuronal firing in the central nervous system (CNS). Aberrant function of Na1.6 may lead to epilepsy and other neurological disorders. ...Voltage-gated sodium channel Na1.6 plays a crucial role in neuronal firing in the central nervous system (CNS). Aberrant function of Na1.6 may lead to epilepsy and other neurological disorders. Specific inhibitors of Na1.6 thus have therapeutic potentials. Here we present the cryo-EM structure of human Na1.6 in the presence of auxiliary subunits β1 and fibroblast growth factor homologous factor 2B (FHF2B) at an overall resolution of 3.1 Å. The overall structure represents an inactivated state with closed pore domain (PD) and all "up" voltage-sensing domains. A conserved carbohydrate-aromatic interaction involving Trp302 and Asn326, together with the β1 subunit, stabilizes the extracellular loop in repeat I. Apart from regular lipids that are resolved in the EM map, an unprecedented Y-shaped density that belongs to an unidentified molecule binds to the PD, revealing a potential site for developing Na1.6-specific blockers. Structural mapping of disease-related Na1.6 mutations provides insights into their pathogenic mechanism. |
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手法 | EM (単粒子) |
解像度 | 3.1 Å |
構造データ | EMDB-29082, PDB-8fhd: |
化合物 | ![]() ChemComp-NAG: ![]() ChemComp-Y01: ![]() ChemComp-CLR: ![]() ChemComp-LPE: ![]() ChemComp-PCW: ![]() ChemComp-P5S: ![]() ChemComp-9Z9: ![]() ChemComp-P3X: |
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![]() | MEMBRANE PROTEIN / Voltage-gated sodium channel / Nav1.6 |