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Expression of the human D 2S dopamine receptor in the yeasts Saccharomyces cerevisiae and Schizosaccharomyces pombe : A comparative study
Author(s) -
Sander Peter,
Grünewald Sylvia,
Reiländer Helmut,
Michel Hartmut
Publication year - 1994
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(94)00335-1
Subject(s) - schizosaccharomyces pombe , saccharomyces cerevisiae , schizosaccharomyces , yeast , cyclin dependent kinase 7 , biology , gene , genetics , chemistry , cell cycle , cyclin dependent kinase 2
The yeasts Saccharomyces cerevisiae and Schizosaccharomyces pombe were tested for heterologous expression of the human D 2S dopamine receptor. The cDNA coding for the dopamine receptor was cloned into high copy number plasmids with inducible promoters. After transformation into the yeasts recombinant clones were examined for the presence of functional receptor by radioligand binding using the antagonist [ 3 H]spiperone. Subsequent Western blot analysis of positive recombinants with an antiserum raised against a peptide from the third intracellular domain of the receptor protein revealed the production of a protein with an apparent molecular mass of 40 kDa in both yeasts. Membranes harvested from recombinant yeast clones exhibited saturable binding of the dopaminergic antagonist [ 3 H]spiperone with K d values of 1.3 nM in S. cerevisiae and 0.25 nM in S. pombe . The rank order of potencies for several dopaminergic ligands to displace specific [ 3 H]spiperone binding to membranes were the same in both yeasts, whereas the affinities for ligands differed significantly.