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-Structure paper
| タイトル | Inactive structures of the vasopressin V2 receptor reveal distinct binding modes for Tolvaptan and Mambaquaretin toxin. |
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| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 3899, Year 2025 |
| 掲載日 | 2025年4月24日 |
著者 | Aurélien Fouillen / Julien Bous / Pierre Couvineau / Hélène Orcel / Charline Mary / Lucie Lafleur / Timothé Pierre / Christiane Mendre / Nicolas Gilles / Gunnar Schulte / Sébastien Granier / Bernard Mouillac / ![]() |
| PubMed 要旨 | Inhibitors of the arginine-vasopressin (AVP) V2 receptor (V2R) are key therapeutic compounds for treating hyponatremia or polycystic kidney diseases. Rational drug design based on experimental G ...Inhibitors of the arginine-vasopressin (AVP) V2 receptor (V2R) are key therapeutic compounds for treating hyponatremia or polycystic kidney diseases. Rational drug design based on experimental G protein-coupled receptor structures is a powerful avenue to develop better drugs. So far, the lack of inhibitor-bound V2R structures has impaired this strategy. Here we describe the cryo-electron microscopy structures of the V2R in complex with two selective inverse agonists, the non-peptide Tolvaptan (TVP) and the green mamba snake Mambaquaretin toxin (MQ1). Both ligands bind into the orthosteric binding site but with substantial differences. TVP binds deeper than MQ1, and directly contacts the toggle switch residue W284 in the transmembrane domain 6. The Kunitz-fold toxin displays extensive contacts with extracellular and transmembrane residues. As anticipated from TVP and MQ1 pharmacological properties, both structures represent inactive V2R conformations. Their comparison with those of the active AVP-bound V2R reveals the molecular mechanisms modulating receptor activity. The mini-protein MQ1-bound V2R structure suggests a new pharmacology approach for treating water homeostasis and renal diseases. |
リンク | Nat Commun / PubMed:40274867 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.5 - 3.8 Å |
| 構造データ | ![]() EMDB-51985: Consensus refinement (Cryo-EM structure of inactive human arginine-vasopressin (AVP) V2 receptor (V2R) with tolvaptan) ![]() EMDB-51986: Local refinement TVP-V2R (Cryo-EM structure of inactive human arginine-vasopressin (AVP) V2 receptor (V2R) with tolvaptan) ![]() EMDB-51987: Local refinement Fab-Nb (Cryo-EM structure of inactive human arginine-vasopressin (AVP) V2 receptor (V2R) with tolvaptan) EMDB-51988, PDB-9hap: ![]() EMDB-52008: local refinment V2R-MQ39A (cryo-EM structure of inactive human arginine-vasopressin (AVP) V2 receptor (V2R) with Mambaquaretin1 K39A (MQK39A)) ![]() EMDB-52009: local refinement MQK39A (cryo-EM structure of inactive human arginine-vasopressin (AVP) V2 receptor (V2R) with Mambaquaretin1 K39A (MQK39A)) ![]() EMDB-52010: Focused refinement Fab-Nb (cryo-EM structure of inactive human arginine-vasopressin (AVP) V2 receptor (V2R) with Mambaquaretin1 K39A (MQK39A)) ![]() EMDB-52011: consensus refinement (cryo-EM structure of inactive human arginine-vasopressin (AVP) V2 receptor (V2R) with Mambaquaretin1 K39A (MQK39A)) EMDB-52012, PDB-9hb3: |
| 化合物 | ![]() PDB-1it8: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / GPCR / V2R / TVP / tolvaptan |
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homo sapiens (ヒト)
dendroaspis angusticeps (コブラ)
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