Receptor for extracellularly released ATP acting as a ligand-gated ion channel that plays multiple role in immunity and central nervous system physiology (PubMed:35165166). Plays a key role in initial steps of T-cell activation and Ca(2+) microdomain formation (By similarity). Participates also in basal T-cell activity without TCR/CD3 stimulation (By similarity). Promotes the differentiation and activation of Th17 cells via expression of retinoic acid-related orphan receptor C/RORC (PubMed:35165166). Upon activation, drives microglia motility via the PI3K/Akt pathway (By similarity). Functional P2XRs are organized as homomeric and heteromeric trimers. Interacts with P2X7 (via C-terminus); this interaction is functional only in the presence of ATP (PubMed:26456657). Interacts with AP1M2 (By similarity). Belongs to the P2X receptor family. P2X receptor entry