Pillar[5]arene-Based Glycoclusters: Synthesis and Multivalent Binding to Pathogenic Bacterial Lectins

Area of Science:

• Carbohydrate Chemistry
• Supramolecular Chemistry
• Medicinal Chemistry

Background:

• Lectins on bacterial pathogens are therapeutic targets for anti-adhesion strategies.
• Pillar[5]arene scaffolds offer a platform for developing multivalent carbohydrate ligands.

Purpose of the Study:

• To synthesize pillar[5]arene-based glycoclusters and evaluate their binding affinity to specific bacterial lectins.
• To explore the impact of multivalency and spacer arm length on lectin-glycocluster interactions.

Main Methods:

• Copper(I)-catalyzed alkyne-azide cycloaddition (CuAAC) for glycocluster synthesis.
• Affinity studies using complementary techniques to assess lectin binding.
• Selection of bacterial lectins (LecA, LecB from Pseudomonas aeruginosa; BambL from Burkholderia ambifaria) for therapeutic relevance.

Main Results:

• Successful synthesis of pillar[5]arene-based glycoclusters via CuAAC conjugation.
• Demonstrated improvement in lectin binding affinity with increased multivalency.
• Identified an optimal spacer arm length for maximizing binding affinity to bacterial lectins.

Conclusions:

• Pillar[5]arene glycoclusters are effective multivalent ligands for bacterial lectins.
• The study provides insights into structure-activity relationships for anti-adhesion drug development.
• Optimized glycocluster design holds promise for therapeutic anti-adhesion applications against bacterial pathogens.