Cloning and functional characterization of a human A1 adenosine receptor

Biochem Biophys Res Commun. 1992 Sep 16;187(2):919-26. doi: 10.1016/0006-291x(92)91285-x.

Abstract

A human brain hippocampus cDNA library was screened by hybridization with a dog A1 adenosine receptor cDNA probe. Sequencing of the resulting clones identified a 978 residue open reading frame encoding a 326 amino acid polypeptide showing 95.7% similarity with the dog A1 adenosine receptor. Individual clones of stably transfected CHO cells expressing the human A1 receptor were obtained and tested for their response to the A1 agonist CPA [N6-cyclopentyladenosine] in the presence of forskolin. One clone was further characterized with respect to membrane binding of various adenosine agonists and antagonists. The rank order of affinities observed was typical of an A1 adenosine receptor. A Kd value of 2.28 nM was determined using [3H]DPCPX [dipropylcyclopentyl-xanthine], an A1 selective antagonist.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adenosine / analogs & derivatives
  • Adenosine / pharmacology
  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • CHO Cells / metabolism
  • Cloning, Molecular*
  • Colforsin / pharmacology
  • Cricetinae
  • DNA / genetics
  • DNA / isolation & purification
  • DNA Probes
  • Dogs
  • Hippocampus / chemistry
  • Humans
  • Molecular Sequence Data
  • Nucleic Acid Hybridization
  • Receptors, Purinergic / chemistry
  • Receptors, Purinergic / genetics*
  • Receptors, Purinergic / physiology
  • Sequence Homology, Nucleic Acid
  • Transfection
  • Xanthines / metabolism

Substances

  • DNA Probes
  • Receptors, Purinergic
  • Xanthines
  • Colforsin
  • N(6)-cyclopentyladenosine
  • DNA
  • 1,3-dipropyl-8-cyclopentylxanthine
  • Adenosine

Associated data

  • GENBANK/D10916
  • GENBANK/D10917
  • GENBANK/D10918
  • GENBANK/D10919
  • GENBANK/D10920
  • GENBANK/S41680
  • GENBANK/S41731
  • GENBANK/S43865
  • GENBANK/S44053
  • GENBANK/S45235