Article
Metal ion-mediated agonism and agonist enhancement in melanocortin MC1 and MC4 receptors.
The Journal of biological chemistry - 6 Dec 2002
Holst Birgitte, Elling Christian E, Schwartz Thue W
Abstract excerpt
An endogenous metal-ion site in the melanocortin MC1 and MC4 receptors was characterized mainly in transiently transfected COS-7 cells. ZnCl(2) alone stimulated signaling through the Gs pathway with a potency of 11 and 13 microm and an efficacy of 50 and 20% of that of alpha-melanocortin stimulating hormone (alpha-MSH) in the MC1 and MC4 receptors, respectively. In the presence of peptide agonist, Zn(II) acted as...
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