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- W4294666970 abstract "The melanocortin 4 receptor (MC4R) plays a role in energy homeostasis and represents a target for treating energy balance disorders. For decades, synthetic ligands have been derived from MC4R endogenous agonists and antagonists, such as setmelanotide used to treat rare forms of genetic obesity. Recently, animal venoms have demonstrated their capacity to provide melanocortin ligands with toxins from a scorpion and a spider. Here, we described a cone snail toxin, N-CTX-Ltg1a, with a nanomolar affinity for hMC4R but unrelated to any known toxins or melanocortin ligands. We then derived from the conotoxin the linear peptide HT1-0, a competitive antagonist of Gs, G15, and β-arrestin2 pathways with a low nanomolar affinity for hMC4R. Similar to endogenous ligands, HT1-0 needs hydrophobic and basic residues to bind hMC4R. Altogether, it represents the first venom-derived peptide of high affinity on MC4R and paves the way for the development of new MC4R antagonists." @default.
- W4294666970 created "2022-09-06" @default.
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- W4294666970 date "2022-09-05" @default.
- W4294666970 modified "2023-10-18" @default.
- W4294666970 title "From a Cone Snail Toxin to a Competitive MC4R Antagonist" @default.
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- W4294666970 doi "https://doi.org/10.1021/acs.jmedchem.2c00786" @default.
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