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Oligopeptides as Neuropeptide Y Y4 Receptor Ligands: Identification of a High-Affinity Tetrapeptide Agonist and a Hexapeptide Antagonist

Konieczny, Adam ; Braun, Diana ; Wifling, David ; Bernhardt, Günther ; Keller, Max


Within the family of neuropeptide Y (NPY) receptors, the Y-4 receptor (Y4R) is unique as it prefers pancreatic polypeptide over NPY and peptide YY. Today, low-molecular-weight Y4R ligands are lacking, in particular antagonists. We synthesized a series of peptidic NPY Y4R ligands, derived from the hexapeptide acetyl-Arg-Tyr-Arg-Leu-Arg-Tyr-NH2 (1), reported to be a Y4R partial agonist with high ...


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