Exploiting a Cryptic Pocket in DsbA through Structure-Guided Parallel Synthesis and Direct-to-Biology Screening

Area of Science:

• Biochemistry
• Structural Biology
• Drug Discovery

Background:

• Antibacterial resistance is a critical global health threat.
• DsbA, a bacterial oxidoreductase, is essential for virulence factor folding and activity.
• Inhibiting DsbA offers a strategy to combat bacterial infections and resistance.

Purpose of the Study:

• To develop novel small-molecule inhibitors targeting Escherichia coli DsbA.
• To explore the potential of DsbA's cryptic pocket as a drug target.
• To create potent antivirulence compounds against drug-resistant bacteria.

Main Methods:

• Structure-based drug design utilizing X-ray crystallography.
• Elaboration of fragments from the DsbA cryptic pocket into the hydrophobic groove.
• Parallel synthesis and direct-to-biology screening of compounds.

Main Results:

• Identification of the most potent small-molecule inhibitors of E. coli DsbA to date.
• Successful design strategy leveraging the cryptic pocket for ligand development.
• Demonstration of a novel approach for targeting bacterial virulence.

Conclusions:

• Exploiting cryptic pockets in enzymes like DsbA is a viable strategy for drug discovery.
• The developed inhibitors represent promising leads for antivirulence therapies.
• This work contributes to the fight against antibacterial resistance through novel compound development.