+検索条件
-Structure paper
| タイトル | Dual receptor-sites reveal the structural basis for hyperactivation of sodium channels by poison-dart toxin batrachotoxin. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 15, Issue 1, Page 2306, Year 2024 |
| 掲載日 | 2024年3月14日 |
著者 | Lige Tonggu / Goragot Wisedchaisri / Tamer M Gamal El-Din / Michael J Lenaeus / Matthew M Logan / Tatsuya Toma / Justin Du Bois / Ning Zheng / William A Catterall / ![]() |
| PubMed 要旨 | The poison dart toxin batrachotoxin is exceptional for its high potency and toxicity, and for its multifaceted modification of the function of voltage-gated sodium channels. By using cryogenic ...The poison dart toxin batrachotoxin is exceptional for its high potency and toxicity, and for its multifaceted modification of the function of voltage-gated sodium channels. By using cryogenic electron microscopy, we identify two homologous, but nonidentical receptor sites that simultaneously bind two molecules of toxin, one at the interface between Domains I and IV, and the other at the interface between Domains III and IV of the cardiac sodium channel. Together, these two bound toxin molecules stabilize α/π helical conformation in the S6 segments that gate the pore, and one of the bound BTX-B molecules interacts with the crucial Lys1421 residue that is essential for sodium conductance and selectivity via an apparent water-bridged hydrogen bond. Overall, our structure provides insight into batrachotoxin's potency, efficacy, and multifaceted functional effects on voltage-gated sodium channels via a dual receptor site mechanism. |
リンク | Nat Commun / PubMed:38485923 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.3 Å |
| 構造データ | EMDB-41071, PDB-8t6l: |
| 化合物 | ![]() ChemComp-NAG: ![]() ChemComp-LBN: ![]() ChemComp-Y01: ![]() ChemComp-9Z9: ![]()
ChemComp-YIJ: ![]() ChemComp-HOH: |
| 由来 |
|
キーワード | MEMBRANE PROTEIN / Ion channel / Sodium channel / Voltage-gated channel / Sodium transport |
ムービー
コントローラー
構造ビューア
万見文献について



著者

リンク









キーワード