Purinergic receptor P2X 6 (P2RX6)

Purinergic receptor P2X 6 (P2RX6) is a member of the P2X family of ligand-gated ion channels, primarily activated by extracellular ATP[1][4][7]. The protein forms part of a trimeric structure, but in humans P2RX6 alone is often non-functional and typically requires co-assembly with other P2X subunits (notably P2RX4 or P2RX2) for efficient membrane targeting and functional channel activity[4][5]. It is predominantly expressed in skeletal muscle and is regulated by p53; it also localizes at adherens junctions in endothelial cells, interacting with VE-cadherin[1][4]. P2RX6 contributes to rapid cation flux (Na+, K+, Ca2+) following ATP binding, influencing muscle and vascular function, as well as possible roles in immune response and inflammation[2][7][8]. No specific drugs target P2RX6 exclusively in clinical practice. Although not a major focus of drug development compared to other P2X family members, its modulation may have implications for cardiovascular and muscle-related diseases.

Other names

P2RX6P2X6P2X purinoceptor 6purinergic receptor P2X 6P2RXL1P2XMpurinergic receptor P2X-like 1purinergic receptor P2X, ligand-gated ion channel, 6ATP receptorRnap2x6

Channel opening upon ATP binding, allowing cation (Na+, K+, Ca2+) influx and downstream cellular responses[1][2][7]. Potential interaction with other P2X receptor subtypes, influencing complex receptor functionality[4][5].