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Recently we have demonstrated that replacing His 6 by constrained amino acids 2 2Amino acid symbols denote L-configuration unless indicated otherwise. in the well-known antagonist SHU-9119 resulted in potent and selective antagonist ligands especially at the hMC3R and hMC5 receptors. With the aim to further explore position 6 in the sequence of SHU-9119 and MT-II, we have designed,...
α-MSH and γ-MSH are the natural endogenous hormones for the human melanocortin-1, 3, 4 and 5 receptors (hMC1R, hMC3R, hMC4R and hMC5R). These and more potent, stable and prolonged acting analogues such as NDP-α-MSH, MT-II and SHU-9119 are not very receptor selective. To develop potent and selective agonist and antagonist ligands for the melanocortin receptors we have used state-of-the-art biophysical...
α-Melanotropin and ACTH, POMC peptides, initiate biological activity by interaction with the classical pigment cell (α-MSH receptor, MC1R) and adrenal gland (ACTH receptor, MC2R) melanocortin receptors, respectively. The recently discovered MC3R, MC4R and MC5R receptors provide new targets and new biological functions for POMC peptides. We have developed conformationally constrained α-melanotropin...
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