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-Structure paper
| タイトル | UDP-glucose and MRS2905 agonist-bound states of the purinergic P2Y receptor. |
|---|---|
| ジャーナル・号・ページ | Commun Biol, Vol. 8, Issue 1, Page 1816, Year 2025 |
| 掲載日 | 2025年11月21日 |
著者 | Jonathan F Fay / Joseph Kousouros / Zhan-Guo Gao / Matteo Pavan / Paola Oliva / Asmita Pramanik / Clayton Meyer / Siva Hariprasad Kurma / Wen Xu / Brian Krumm / Kenneth A Jacobson / ![]() |
| PubMed 要旨 | P2Y receptors respond to uracil-diphosphate-hexose conjugates, yet how this receptor selectively recognizes both uracil-nucleotides and hexose moieties of diverse agonists remains unclear. Here we ...P2Y receptors respond to uracil-diphosphate-hexose conjugates, yet how this receptor selectively recognizes both uracil-nucleotides and hexose moieties of diverse agonists remains unclear. Here we report the active agonist-bound G protein-bound states of the P2Y G protein-coupled receptor (GPCR) bound to endogenous agonist uridine diphosphate glucose (UDP-glucose) and 2-thiouridine-5'-O-(α,β-methylene)diphosphate (MRS2905). The cryo-EM structures of the heterotrimeric complexes with 3.19 Å and 3.05 Å global resolution, respectively, with local refinements reaching 2.87 Å and 3.22 Å for the masked receptor region. Our structures reveal a pronounced extracellular facing electronegative vestibule connecting to a smaller nucleotide binding subpocket (~300Å volume) that is shielded by extracellular loop 2 (ECL2). A glucose-binding subpocket is spatially delimited by residue V93; mutation to Trp selectively blocks UDP-glucose while permitting MRS2905 and antagonist binding. These findings provide atomic insights into uracil recognition, reveal how the receptor accommodates diverse flexible UDP-sugars, and promise to enable rational drug discovery of therapeutic P2YR modulators. |
リンク | Commun Biol / PubMed:41272298 / PubMed Central |
| 手法 | EM (単粒子) |
| 解像度 | 2.87 - 3.22 Å |
| 構造データ | EMDB-72835, PDB-9ydu: EMDB-72836, PDB-9ydv: ![]() EMDB-72837: P2Y14R bound to MRS2905 (local refinement) ![]() EMDB-72838: P2Y14R bound to UDPG (local refinement) |
| 化合物 | ![]() ChemComp-UPG: ![]() PDB-1cvs: |
| 由来 |
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キーワード | MEMBRANE PROTEIN / GPCR / P2Y Receptor / purinergic |
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