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-Structure paper
| タイトル | Ion channel inhibition by targeted recruitment of NEDD4-2 with divalent nanobodies. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 17, Issue 1, Page 378, Year 2025 |
| 掲載日 | 2025年12月6日 |
著者 | Arden Darko-Boateng / Emmanuel Afriyie / Travis J Morgenstern / Sri Karthika Shanmugam / Xinle Zou / Yianni D Laloudakis / Papiya Choudhury / Meera Desai / Robert S Kass / Francesca Vallese / Oliver B Clarke / Henry M Colecraft / ![]() |
| PubMed 要旨 | Targeted protein degradation/downregulation (TPD/TPDR) is a disruptive paradigm for developing therapeutics. <2% of ~600 E3 ligases have been exploited for this modality, and efficacy for multi-subunit ion channels has not been demonstrated. NEDD4-2 E3 ligase regulates myriad ion channels, but its utility for TPD/TPDR is uncertain due to complex regulatory mechanisms. Here, we identify a nanobody that binds NEDD4-2 HECT domain without disrupting catalysis sites as revealed by cryo-electron microscopy and in vitro ubiquitination assays. Recruiting NEDD4-2 to diverse ion channels (Ca2.2; KCNQ1; and epithelial Na channel, ENaC, with a Liddle syndrome mutation) using divalent nanobodies (DiVas) strongly suppresses their surface density and function. Global proteomics indicates DiVa recruitment of endogenous NEDD4-2 to KCNQ1-YFP yields dramatically lower off-target effects compared to NEDD4-2 overexpression. The results establish utility of NEDD4-2 recruitment for TPD/TPDR, validate ion channels as susceptible to this modality, and introduce a general method to generate ion channel inhibitors. |
リンク | Nat Commun / PubMed:41353348 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 3.06 Å |
| 構造データ | EMDB-73821, PDB-9z5q: |
| 由来 |
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キーワード | LIGASE / Ubiquitin / targeted protein degradation / E3 ligase / Nanobody |
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