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-Structure paper
| タイトル | Molecular basis of ligand binding and receptor activation at the human A adenosine receptor. |
|---|---|
| ジャーナル・号・ページ | Nat Commun, Vol. 16, Issue 1, Page 7674, Year 2025 |
| 掲載日 | 2025年8月18日 |
著者 | Liudi Zhang / Jesse I Mobbs / Felix M Bennetts / Hariprasad Venugopal / Anh T N Nguyen / Arthur Christopoulos / Daan van der Es / Laura H Heitman / Lauren T May / Alisa Glukhova / David M Thal / ![]() |
| PubMed 要旨 | Adenosine receptors (ARs: AAR, AAR, AAR, and AAR) are crucial therapeutic targets; however, developing selective, efficacious drugs for them remains a significant challenge. Here, we present high- ...Adenosine receptors (ARs: AAR, AAR, AAR, and AAR) are crucial therapeutic targets; however, developing selective, efficacious drugs for them remains a significant challenge. Here, we present high-resolution cryo-electron microscopy (cryo-EM) structures of the human AAR in three distinct functional states: bound to the endogenous agonist adenosine, the clinically relevant agonist Piclidenoson, and the covalent antagonist LUF7602. These structures, complemented by mutagenesis and pharmacological studies, reveal an AAR activation mechanism that involves an extensive hydrogen bond network from the extracellular surface down to the orthosteric binding site. In addition, we identify a cryptic pocket that accommodates the N-iodobenzyl group of Piclidenoson through a ligand-dependent conformational change of M174. Our comprehensive structural and functional characterisation of AAR advances our understanding of adenosine receptor pharmacology and establishes a foundation for developing more selective therapeutics for various disorders, including inflammatory diseases, cancer, and glaucoma. |
リンク | Nat Commun / PubMed:40825947 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.6 - 3.6 Å |
| 構造データ | EMDB-47879, PDB-9ebh: EMDB-47880, PDB-9ebi: ![]() EMDB-47994: Focused refinement map of the human A3 adenosine receptor bound to adenosine (receptor only) ![]() EMDB-47998: Focused refinement map of the human A3 adenosine receptor bound to Piclidenoson (receptor only) ![]() EMDB-48063: Consensus map for A3AR-LUF7602 complex. ![]() EMDB-48064: Focused refinement map of the structure of a human adenosine A3 receptor complex bound to the covalent antagonist LUF7602 (receptor only) EMDB-48065, PDB-9ehs: |
| 化合物 | ![]() ChemComp-ADN: ![]() ChemComp-Q8L: ![]() PDB-1bii: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / G protein-coupled receptor / adenosine binding / seven transmembrane protein / SIGNALING PROTEIN |
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