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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The agouti-related protein decapeptide (Yc[CRFFNAFC]Y) possesses agonist activity at the murine melanocortin-1 receptor.

Agouti-related protein ( AGRP) is a naturally occurring antagonist of the brain melanocortin receptors (MC3R and MC4R) and is physiologically implicated as participating in feeding behavior and energy homeostasis. The human AGRP decapeptide Yc[CRFFNAFC]Y has been previously reported as binding to the human MC3 and MC4 receptors and antagonizing the MC4 receptor. We have synthesized this decapeptide and pharmacologically characterized it at the murine melanocortin receptors and found it to possess MC4R antagonist activity (pA(2) = 6.8) and, unexpectedly, MC1R agonist activity (EC(50) = 2.89 microM). This study characterizes the first AGRP-based peptide agonist at the melanocortin receptors.[1]


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