P2X purinoreceptor

ATP P2X receptor
Figure 1. Schematic representation showing the membrane topology of a typical P2X receptor subunit. First and second transmembrane domains are labeled TM1 and TM2.
Identifiers
SymbolP2X_receptor
PfamPF00864
InterProIPR001429
PROSITEPDOC00932
TCDB1.A.7
OPM superfamily181
OPM protein3h9v
Available protein structures:
Pfam  structures / ECOD  
PDBRCSB PDB; PDBe; PDBj
PDBsumstructure summary

The P2X receptors, also ATP-gated P2X receptor cation channel family,[1] is a protein family that consists of cation-permeable ligand-gated ion channels that open in response to the binding of extracellular adenosine 5'-triphosphate (ATP). They belong to a larger family of receptors known as the ENaC/P2X superfamily.[1] ENaC and P2X receptors have similar 3-D structures and are homologous.[2] P2X receptors are present in a diverse array of organisms including humans, mouse, rat, rabbit, chicken, zebrafish, bullfrog, fluke, and amoeba.[3]

Figure 2. Crystal structure of the zebrafish P2X4 receptor (deltaP2X4-B) channel as viewed from the side (left), extracellular (top right), and intracellular (bottom right) perspectives(PDB: 3I5D​)
  1. ^ a b "ATP-gated P2X Receptor Cation Channel (P2X Receptor) Family". Functional and Phylogenetic Classification of Membrane Transport Proteins. Saier Lab. Group, UCSD and SDSC.
  2. ^ Chen JS, Reddy V, Chen JH, Shlykov MA, Zheng WH, Cho J, Yen MR, Saier MH (2011). "Phylogenetic characterization of transport protein superfamilies: superiority of SuperfamilyTree programs over those based on multiple alignments". J. Mol. Microbiol. Biotechnol. 21 (3–4): 83–96. doi:10.1159/000334611. PMC 3290041. PMID 22286036.
  3. ^ Cite error: The named reference ReferenceA was invoked but never defined (see the help page).