UDP-glucose and MRS2905 agonist-bound states of the purinergic P2Y₁₄ receptor.

ABSTRACT: P2Y₁₄ 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 P2Y₁₄ 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 (~300ų

SUBMITTER: Fay JF 

PROVIDER: S-EPMC12738662 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature