Related Experiment Video

Updated: Sep 5, 2025

Visualizing the Conformational Dynamics of Membrane Receptors Using Single-Molecule FRET
10:59

Visualizing the Conformational Dynamics of Membrane Receptors Using Single-Molecule FRET

Published on: August 17, 2022

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MC4R biased signalling and the conformational basis of biological function selections

Zekun Liu1, Victor J Hruby1

  • 1Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona, USA.

Journal of Cellular and Molecular Medicine
|July 12, 2022
PubMed

Insights

Researchers are exploring biased signaling for the melanocortin 4 receptor (MC4R) to develop new obesity treatments. Understanding MC4R activation and signaling selection is key for next-generation peptide drugs.

Area of Science:

  • Pharmacology
  • Biochemistry
  • Molecular Biology

Background:

  • The melanocortin 4 receptor (MC4R) is a key target for obesity pharmacotherapy.
  • Evolutionary knowledge and structure-activity relationship (SAR) studies advance MC4R drug development.
  • The understanding of G protein-coupled receptors (GPCRs) has evolved from a simple active-inactive model to a multi-state model.

Purpose of the Study:

  • To explore the concept of biased signaling in MC4R drug development.
  • To advance the development of next-generation peptide drugs targeting MC4R.
  • To understand the mechanism of MC4R activation and signaling selection.

Main Methods:

  • Determination of MC4R value structures.
  • Analysis of ligand binding and downstream signaling.
  • Investigating GPCR multi-state models.

Main Results:

  • MC4R activation insights were gained through value structure determination.
  • The study highlights the shift towards signaling pathway selectivity over receptor subtype specificity.
  • Challenges remain in fully unraveling MC4R signaling selection mechanisms.

Conclusions:

  • Biased signaling represents a new frontier for MC4R-targeted obesity treatments.
  • Further research with biased agonists and ligands is crucial for MC4R signaling elucidation.
  • Next-generation peptide drug development requires a focus on pathway selectivity.
Keywords:
Biased signallingConformational studiesMC4RMC4R drug designMC4R structure

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