Cloning and functional characterization of a human A1 adenosine receptor.
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Libert F, Van Sande J, Lefort A, Czernilofsky A, Dumont JE, Vassart G, Ensinger HA, Mendla KD
Cloning and functional characterization of a human A1 adenosine receptor.
Biochem Biophys Res Commun. 1992 Sep 16;187(2):919-26.
- PubMed ID
- 1530647 [ View in PubMed]
- 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.