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Advances in Cyclic Peptides Targeting G Protein-Coupled Receptors
Yingxin Zhou1, Ni Li2, Ji-Shen Zheng2
1School of Basic Medicine Sciences, Wannan Medical University, Wuhu, Anhui, China.
Cyclic peptides offer a powerful strategy for targeting peptide- G protein-coupled receptors (GPCRs). Their unique structures enable precise modulation of receptor interactions for drug discovery.
Area of Science:
- Medicinal Chemistry
- Pharmacology
- Molecular Biology
Background:
- Peptide-responsive G protein-coupled receptors (GPCRs) recognize peptide ligands via extensive interfaces.
- Conventional small molecules have limitations in accessing these complex receptor sites.
Purpose of the Study:
- To review cyclic peptides targeting peptide-GPCRs.
- To explore natural macrocycles, chemical optimization strategies, and discovery platforms.
Main Methods:
- Examining natural cyclic peptides (endogenous, venom, plant, microbial).
- Discussing chemical engineering approaches (bridge replacement, conformational locking).
- Highlighting discovery technologies (mRNA display, phage display, computational design).
Main Results:
- Cyclic peptides preorganize pharmacophores for enhanced receptor engagement.
- Engineering approaches improve selectivity, signaling, and pharmacokinetic properties.
- Advanced discovery platforms accelerate the identification of potent macrocycles.
Conclusions:
- Cyclic peptides represent a topology-guided approach for understanding peptide-GPCR interactions.
- These macrocycles are promising for developing novel therapeutics targeting GPCRs.
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