Incorporation of Agouti-Related Protein (AgRP) Human Single Nucleotide Polymorphisms (SNPs) in the AgRP-Derived Macrocyclic Scaffold c[Pro-Arg-Phe-Phe-Asn-Ala-Phe- d Pro] Decreases Melanocortin-4 Receptor Antagonist Potency and Results in the Discovery of Melanocortin-5 Receptor Antagonists

Zoe M. Koerperich, Mark D. Ericson, Katie T. Freeman, Robert C. Speth, Irina D. Pogozheva, Henry I. Mosberg, Carrie Haskell-Luevano

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

While the melanocortin receptors (MCRs) are known to be involved in numerous biological pathways, the potential roles of the MC5R have not been clearly elucidated in humans. Agouti-related protein (AgRP), an MC3R/MC4R antagonist and MC4R inverse agonist, contains an exposed β-hairpin loop composed of six residues (Arg-Phe-Phe-Asn-Ala-Phe) that is imperative for binding and function. Within this active loop of AgRP, four human missense polymorphisms were deposited into the NIH Variation Viewer database. These polymorphisms, Arg111Cys, Arg111His, Phe112Tyr, and Ala115Val (AgRP full-length numbering), were incorporated into the peptide macrocycles c[Pro1-Arg2-Phe3-Phe4-Xaa5-Ala6-Phe7-dPro8], where Xaa was Dap5 or Asn5, to explore the functional effects of these naturally occurring substitutions in a simplified AgRP scaffold. All peptides lowered potency at least 10-fold in a cAMP accumulation assay compared to the parent sequences at the MC4Rs. Compounds MDE 6-82-3c, ZMK 2-82, MDE 6-82-1c, ZMK 2-85, and ZMK 2-112 are also the first AgRP-based chemotypes that antagonize the MC5R.

Original languageEnglish (US)
Pages (from-to)2194-2208
Number of pages15
JournalJournal of medicinal chemistry
Volume63
Issue number5
DOIs
StatePublished - Mar 12 2020

Bibliographical note

Funding Information:
This work has been supported by NIH Grant R01DK108893. C.H.-L. is a recipient of a 2017 Wallin Neuroscience Discovery Fund Award through the University of Minnesota. M.D.E. is a recipient of an NIH Postdoctoral Fellowship (F32DK108402). I.D.P. was funded by the NSF Division of Biological Infrastructure (award 1855425).

Publisher Copyright:
Copyright © 2019 American Chemical Society.

PubMed: MeSH publication types

  • Journal Article
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

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