Small and Simple, yet Sturdy: Conformationally Constrained Peptides with Remarkable Properties

Area of Science:

• Medicinal Chemistry
• Biotechnology
• Drug Discovery

Background:

• Peptides possess vast chemical space for target interactions but suffer from poor binding affinity and metabolic stability due to inherent flexibility.
• This flexibility limits their therapeutic utility, necessitating strategies to improve their drug-like properties.

Purpose of the Study:

• To review the properties of conformationally constrained peptides.
• To discuss methods for rigidifying peptides and producing macrocyclic peptides.
• To explore in vitro molecular evolution for developing functional constrained peptides.

Main Methods:

• Review of rigidification chemistries and strategies for peptide backbone modification.
• Discussion of synthetic and enzymatic methods for macrocyclic peptide production.
• Overview of in vitro molecular evolution techniques for peptide optimization.

Main Results:

• Conformationally constrained peptides demonstrate improved binding affinity and metabolic stability compared to linear peptides.
• Various chemical and enzymatic strategies enable the production of rigidified and macrocyclic peptides.
• Molecular evolution facilitates the development of constrained peptides with tailored functions.

Conclusions:

• Conformationally constrained peptides represent a promising class of therapeutics with enhanced drug-like properties.
• These peptides show potential as drug candidates, molecular probes, and minimalist catalysts.
• Rigidification strategies are key to unlocking the full therapeutic potential of peptides.