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-Structure paper
| タイトル | Mechanism of (-)-Englerin A and calcium binding on the human TRPC5 channel. |
|---|---|
| ジャーナル・号・ページ | Protein Sci, Vol. 34, Issue 8, Page e70218, Year 2025 |
| 掲載日 | 2025年8月15日 |
著者 | Yikun Chen / Kangcheng Song / Wenjun Guo / Miao Wei / Lei Chen / ![]() |
| PubMed 要旨 | The natural product (-)-Englerin A (EA) selectively inhibits renal cancer cell growth by potently activating TRPC4 and TRPC5-containing ion channels. However, its binding site on these channels has ...The natural product (-)-Englerin A (EA) selectively inhibits renal cancer cell growth by potently activating TRPC4 and TRPC5-containing ion channels. However, its binding site on these channels has remained elusive. In this study, we present two cryo-EM structures of human TRPC5 in complex with EA at 2.5 and 2.6 Å resolution, which reveal the EA-binding site and identify two major conformations influenced by calcium. EA binds between the pore helix and S5/S6 helices of hTRPC5, forming critical hydrophobic and polar interactions that underscore its specificity. Calcium binding at the intracellular domain of TRPC5 induces structural changes that stabilize the domain in a compact conformation. These findings expand our understanding of the structural pharmacology of TRPC5 and provide a framework for investigating calcium regulation in TRPC channels. |
リンク | Protein Sci / PubMed:40671342 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.48 - 2.62 Å |
| 構造データ | EMDB-63600, PDB-9m36: EMDB-63631, PDB-9m4w: EMDB-63651, PDB-9m5v: |
| 化合物 | ![]() ChemComp-ZN: ![]() ChemComp-PTY: ![]() ChemComp-POV: ![]() ChemComp-Y01: ![]() PDB-1l5i: ![]() PDB-1l55: ![]() ChemComp-CA: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / Ion channel / TRPC5 / calcium / (-)-englerin A / cryo-EM |
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