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-Structure paper
タイトル | Extracellular modulation of TREK-2 activity with nanobodies provides insight into the mechanisms of K2P channel regulation. |
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ジャーナル・号・ページ | Nat Commun, Vol. 15, Issue 1, Page 4173, Year 2024 |
掲載日 | 2024年5月16日 |
著者 | Karin E J Rödström / Alexander Cloake / Janina Sörmann / Agnese Baronina / Kathryn H M Smith / Ashley C W Pike / Jackie Ang / Peter Proks / Marcus Schewe / Ingelise Holland-Kaye / Simon R Bushell / Jenna Elliott / Els Pardon / Thomas Baukrowitz / Raymond J Owens / Simon Newstead / Jan Steyaert / Elisabeth P Carpenter / Stephen J Tucker / |
PubMed 要旨 | Potassium channels of the Two-Pore Domain (K2P) subfamily, KCNK1-KCNK18, play crucial roles in controlling the electrical activity of many different cell types and represent attractive therapeutic ...Potassium channels of the Two-Pore Domain (K2P) subfamily, KCNK1-KCNK18, play crucial roles in controlling the electrical activity of many different cell types and represent attractive therapeutic targets. However, the identification of highly selective small molecule drugs against these channels has been challenging due to the high degree of structural and functional conservation that exists not only between K2P channels, but across the whole K channel superfamily. To address the issue of selectivity, here we generate camelid antibody fragments (nanobodies) against the TREK-2 (KCNK10) K2P K channel and identify selective binders including several that directly modulate channel activity. X-ray crystallography and CryoEM data of these nanobodies in complex with TREK-2 also reveal insights into their mechanisms of activation and inhibition via binding to the extracellular loops and Cap domain, as well as their suitability for immunodetection. These structures facilitate design of a biparatropic inhibitory nanobody with markedly improved sensitivity. Together, these results provide important insights into TREK channel gating and provide an alternative, more selective approach to modulation of K2P channel activity via their extracellular domains. |
リンク | Nat Commun / PubMed:38755204 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 2.4 - 7.37 Å |
構造データ | EMDB-19066: TREK2 in OGNG/CHS detergent micelle with biparatopic inhibitory nanobody Nb6158 PDB-8qz1: PDB-8qz2: PDB-8qz3: PDB-8qz4: |
化合物 | ChemComp-K: ChemComp-MPD: ChemComp-HOH: ChemComp-BA: ChemComp-Y01: |
由来 |
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キーワード | MEMBRANE PROTEIN / Potassium ion channel / Nanobody / Structural Genomics / Structural Genomics Consortium / SGC |