Structure-forward targeting of claudins with synthetic binders

Area of Science:

• Biochemistry
• Molecular Biology
• Cell Biology

Background:

• Claudins are key proteins in tight junctions, controlling paracellular transport in epithelial and endothelial tissues.
• Claudin-claudin interactions at extracellular segments are vital for tight junction barrier integrity and function.
• Developing targeted biologic or small molecule binders is difficult due to the small, dynamic nature of claudin extracellular segments and lack of structural data.

Purpose of the Study:

• To review current claudin targeting strategies and recent advancements in molecule development.
• To explore the impact of natural and synthetic molecules on claudin and tight junction biology.
• To provide a structure-forward framework for designing novel claudin-binding molecules.

Main Methods:

• Literature review of claudin targeting strategies.
• Analysis of recent advances in natural and synthetic molecule development.
• Focus on structure-based design principles for claudin binders.

Main Results:

• Identified challenges in developing binders for small, dynamic claudin extracellular segments.
• Highlighted the impact of existing molecules on claudin and tight junction biology.
• Emphasized the importance of understanding claudin assembly and structure for therapeutic development.

Conclusions:

• Therapeutic potential of claudin-targeting molecules hinges on understanding their assembly and structure.
• A structure-forward approach is essential for designing new claudin-binding molecules with diverse functions.
• This review offers a framework to guide the rational design of next-generation claudin-based therapeutics.