Molecular cloning and functional expression of a novel rat heart P2X purinoceptor

FEBS Lett. 1996 Jun 17;388(2-3):123-7. doi: 10.1016/0014-5793(96)00499-1.


Here we describe a novel purinergic receptor, the P2X5 receptor, cloned from rat heart. The full-length cDNA encodes a protein 455 amino acids long which shares an overall identity of 40-47% with other members of the P2X purinergic receptor family. P2X5 mRNA transcripts are found predominantly in rat heart but are also present in brain, spinal cord and adrenal gland. Functional expression of the recombinant receptor in HEK-293 cells shows a current that resembles mostly the P2X2 phenotype: the ATP-activated current reveals little agonist desensitization, is not activated by alpha,beta-meATP and is completely blocked by suramin and PPADS.

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Cell Line
  • Cloning, Molecular
  • DNA, Complementary
  • Gene Expression
  • Molecular Sequence Data
  • Myocardium / metabolism*
  • RNA, Messenger
  • Rats
  • Receptors, Purinergic P2 / genetics*
  • Receptors, Purinergic P2 / metabolism
  • Receptors, Purinergic P2X5
  • Recombinant Fusion Proteins / genetics
  • Recombinant Fusion Proteins / metabolism
  • Sequence Homology, Amino Acid
  • Tissue Distribution


  • DNA, Complementary
  • P2rx5 protein, rat
  • RNA, Messenger
  • Receptors, Purinergic P2
  • Receptors, Purinergic P2X5
  • Recombinant Fusion Proteins

Associated data

  • GENBANK/X97328