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-Structure paper
タイトル | Structural mechanisms of TRPV6 inhibition by ruthenium red and econazole. |
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ジャーナル・号・ページ | Nat Commun, Vol. 12, Issue 1, Page 6284, Year 2021 |
掲載日 | 2021年11月1日 |
著者 | Arthur Neuberger / Kirill D Nadezhdin / Alexander I Sobolevsky / |
PubMed 要旨 | TRPV6 is a calcium-selective ion channel implicated in epithelial Ca uptake. TRPV6 inhibitors are needed for the treatment of a broad range of diseases associated with disturbed calcium homeostasis, ...TRPV6 is a calcium-selective ion channel implicated in epithelial Ca uptake. TRPV6 inhibitors are needed for the treatment of a broad range of diseases associated with disturbed calcium homeostasis, including cancers. Here we combine cryo-EM, calcium imaging, and mutagenesis to explore molecular bases of human TRPV6 inhibition by the antifungal drug econazole and the universal ion channel blocker ruthenium red (RR). Econazole binds to an allosteric site at the channel's periphery, where it replaces a lipid. In contrast, RR inhibits TRPV6 by binding in the middle of the ion channel's selectivity filter and plugging its pore like a bottle cork. Despite different binding site locations, both inhibitors induce similar conformational changes in the channel resulting in closure of the gate formed by S6 helices bundle crossing. The uncovered molecular mechanisms of TRPV6 inhibition can guide the design of a new generation of clinically useful inhibitors. |
リンク | Nat Commun / PubMed:34725357 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.43 - 2.85 Å |
構造データ | EMDB-24890, PDB-7s88: EMDB-24891, PDB-7s89: EMDB-24892, PDB-7s8b: EMDB-24893, PDB-7s8c: |
化合物 | ChemComp-Y01: ChemComp-PCW: ChemComp-POV: ChemComp-CA: ChemComp-HOH: ChemComp-R2R: ChemComp-ECL: ChemComp-CL: |
由来 |
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キーワード | MEMBRANE PROTEIN / Transient Receptor Potential V Family Member 6 / TRP / channel / apo / open / human / TRPV6 / cNW11 / nanodiscs / ruthenium red / channel blocker / antagonist / econazole / inhibitor |