Related Experiment Video
Updated: Oct 1, 2026

Quantifying Agonist Activity at G Protein-coupled Receptors
Published on: December 26, 2011
Adenylate cyclase activity in the parotid gland of the mouse after isoproterenol stimulation
Abstract:
Previous studies have described a decrease in the activity of adenylate cyclase in the parotid gland of isoproterenol-treated rats. In the present studies, a similar decrease was observed in mice treated with isoproterenol. Studies on the subcellular distribution of adenylate cyclase after isoproterenol stimulation of the parotid gland showed that enzyme activity was increased in the lysosomal fraction and decreased in the cellular membrane fractions. Cytochemical studies on the localization of adenylate cyclase in stimulated gland showed an increase in vesicles which contained enzyme activity and a decrease in activity at the luminal and plasma membranes. It is suggested, based on the present findings and results reported by other investigators, that after isoproterenol stimulation of the parotid gland, adenylate cyclase (along with excess membrane) is degraded by lysosomes. If this suggestion is true, then the observed decrease in adenylate cyclase would have a molecular explanation.
Related Concept Videos
Activation and Inactivation of G Proteins
G-Protein Gated Ion Channels
Sensory organs,...
GPCRs Regulate Adenylyl Cylase Activity
Two...

