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-Structure paper
| タイトル | Structure of CFTR bound to (R)-BPO-27 unveils a pore-blockage mechanism. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 7059, Year 2025 |
| 掲載日 | 2025年8月1日 |
著者 | Paul G Young / Karol Fiedorczuk / Jue Chen / ![]() |
| PubMed 要旨 | Hyperactivation of the cystic fibrosis transmembrane conductance regulator (CFTR) contributes to secretory diarrhea, a major cause of pediatric mortality worldwide, and autosomal dominant polycystic ...Hyperactivation of the cystic fibrosis transmembrane conductance regulator (CFTR) contributes to secretory diarrhea, a major cause of pediatric mortality worldwide, and autosomal dominant polycystic kidney disease (ADPKD), the most common inherited cause of end-stage renal disease. Selective CFTR inhibition is a potential therapeutic strategy, with (R)-BPO-27 emerging as a promising candidate. Here, we present a cryo-EM structure of CFTR bound to (R)-BPO-27 at an overall resolution of 2.1 Å. Contrary to the previous hypothesis that it inhibits CFTR current by competition with ATP, we demonstrate that (R)-BPO-27 instead directly occludes the chloride-conducting pore while permitting ATP hydrolysis, thus uncoupling the two activities. Furthermore, we find that inhibitor binding requires some degree of NBD separation, as the inhibition rate inversely correlates with the probability NBD dimerization. These findings clarify the compound's mechanism and provide a molecular basis for optimizing its clinical potential. |
リンク | Nat Commun / PubMed:40750590 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.1 Å |
| 構造データ | EMDB-48717, PDB-9mxl: |
| 化合物 | ![]() PDB-1buj: ![]() ChemComp-MG: ![]() ChemComp-ATP: ![]() ChemComp-CL: ![]() ChemComp-HOH: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / Inhibitor / CFTR |
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