Melanocortin Receptor (MCR)

The melanocortin receptors (MCRs) are a family of five closely related G protein-coupled receptors (GPCRs): MC1R, MC2R, MC3R, MC4R, and MC5R. These receptors play crucial roles in various physiological processes including pigmentation, energy homeostasis, inflammation regulation, and exocrine secretion. Each receptor subtype has distinct tissue distribution and functional roles. They are targets for drugs treating conditions such as obesity/metabolic syndrome (mainly MC4R) and pigmentation disorders/melanoma risk (mainly MC1R). Developing highly selective ligands is challenging due to high sequence conservation among receptor subtypes' ligand-binding regions. Structure-based drug design efforts focus on exploiting subtle differences between subtypes.

Other names

MC1RMC2RMC3RMC4RMC5R

Agonists or antagonists binding to melanocortin receptors modulate cAMP levels and downstream signaling pathways, affecting pigmentation, energy balance, and other physiological processes.