title: Gene structure, chromosomal localization, cDNA cloning and expression of the mouse ATP-gated ionotropic receptor P2X5 subunit.
abstract: The P2X receptors are oligomeric ligand-gated ion channels operated by extracellular ATP. Here we report the genomic and cDNA sequence of the mouse P2X(5) subunit, as well as its genomic organization, chromosomal localization and expression in select tissues. The mouse gene spans approximately 13 kb of DNA and contains thirteen exons. The cDNA encodes a 455 amino acid protein with 95% identity to the rat subunit. The P2X(5) subunit gene encodes a 2.6 kb mRNA that was found to in a number of tissues, with highest levels detected in heart and kidney. Results from rapid amplification of cDNA ends (RACE) PCR suggest that there are multiple transcriptional start sites located approximately 30-70 bp upstream from the start codon. The gene was localized to band B5 on Chromosome 11 using fluorescence in-situ hybridization (FISH), a region that has a high degree of synteny with human Chromosome 17. These results provide the initial information useful for further investigation into the functional role(s) of the P2X(5) subunit in physiological processes.
authors.affiliation: Department of Pharmacological, Physiological Sciences, Saint Louis University School of Medicine, 1402 S. Grand Blvd, St. Louis, MO 63104, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: Cox
authors.forename: O
authors.initials: O
authors.lastname: Barmina
authors.forename: M M
authors.initials: MM
authors.lastname: Voigt
mesh_terms: D000255:Adenosine Triphosphate / Q000502:physiology*; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D002871:Chromosome Banding; D002874:Chromosome Mapping; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000737:chemistry / Q000235:genetics*; D015870:Gene Expression; D005796:Genes / Q000235:genetics*; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D008564:Membrane Potentials / Q000502:physiology; D051379:Mice; D008815:Mice, Inbred Strains; D008969:Molecular Sequence Data; D021122:Protein Subunits; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D051381:Rats; D018048:Receptors, Purinergic P2 / Q000235:genetics* / Q000502:physiology; D058485:Receptors, Purinergic P2X5; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D014018:Tissue Distribution; D014158:Transcription, Genetic
chemical_list: D018076:DNA, Complementary; C546465:P2RX5 protein, human; C546466:P2rx5 protein, mouse; C546467:P2rx5 protein, rat; D021122:Protein Subunits; D012333:RNA, Messenger; D018048:Receptors, Purinergic P2; D058485:Receptors, Purinergic P2X5; D000255:Adenosine Triphosphate