Pertussis toxin attenuates atrial natriuretic factor-mediated inhibition of adenylate cyclase. Involvement of inhibitory guanine nucleotide regulatory protein
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Pertussis toxin attenuates atrial natriuretic factor-mediated inhibition of adenylate cyclase. Involvement of inhibitory guanine nucleotide regulatory protein
J Biol Chem.
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Free article
Abstract
The effect of pertussis toxin treatment was studied on the inhibitory effect of atrial natriuretic factor (ANF) on adenylate cyclase activity in rat aorta. The incubation of rat aorta washed particles with pertussis toxin and [alpha-32P]NAD resulted in the ADP-ribosylation of a single 40-kDa protein. In addition, pertussis toxin treatment enhanced guanosine 5'-O-(thiotriphosphate) and isoproterenol-stimulated adenylate cyclase activities and attenuated the ANF-mediated inhibition of basal, isoproterenol-, and forskolin-stimulated adenylate cyclase activities. These data suggest that ANF receptors are coupled to adenylate cyclase through inhibitory guanine nucleotide regulatory protein.
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