RGD Reference Report - Cloning OF P2X5 and P2X6 receptors and the distribution and properties of an extended family of ATP-gated ion channels. - Rat Genome Database

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Cloning OF P2X5 and P2X6 receptors and the distribution and properties of an extended family of ATP-gated ion channels.

Authors: Collo, G  North, RA  Kawashima, E  Merlo-Pich, E  Neidhart, S  Surprenant, A  Buell, G 
Citation: Collo G, etal., J Neurosci 1996 Apr 15;16(8):2495-507.
RGD ID: 729425
Pubmed: PMID:8786426   (View Abstract at PubMed)
PMCID: PMC6578782   (View Article at PubMed Central)

Two new P2X receptor cDNAs (P2X5 and P2X6) were isolated and expressed. All six proteins are 36-48 percent identical and seem to have two transmembrane segments with a large extracellular loop. Functionally, P2X5 and P2X6 receptors most resemble P2X2 and P2X4; they desensitize only slowly and do not respond to alpha beta methylene-ATP. P2X6 receptors, like P2X4, receptors, are not blocked by the antagonists suramin and pyridoxal-5-phosphate-6-azophenyl-2',4'-disulfonic acid. P2X6 and P2X5 receptors express at lower levels than P2X1-P2X4 receptors do, perhaps indicating that they do not normally form homomultimeric channels. P2X6 and P2X4 are the receptors expressed most heavily in brain, where their RNAs have a widespread and extensively overlapping distribution. The spinal cord expresses all receptors except P2X3. P2X2, P2X4, and P2X6, are the most abundant in the dorsal horn. Sensory neurons of the trigeminal, dorsal root, and nodose ganglia express all six RNAs; P2X3 is found only there. The functional properties and tissue distribution of these six P2X receptors indicate new roles for ATP-gated ion channels.



Gene Ontology Annotations    Click to see Annotation Detail View

Molecular Function

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
P2rx5RatATP-gated ion channel activity enablesIDA PMID:8786426UniProt 
P2rx6Ratextracellularly ATP-gated monoatomic cation channel activity  IDA  RGD 

Objects Annotated

Genes (Rattus norvegicus)
P2rx5  (purinergic receptor P2X 5)
P2rx6  (purinergic receptor P2X 6)


Additional Information