Phage display for target-based antibacterial drug discovery

Area of Science:

• Microbiology
• Drug Discovery
• Biochemistry

Background:

• Rising antibiotic resistance and persistent infections necessitate novel antibacterial agents.
• Genomic sequencing offers numerous potential targets for new antibiotics, but their functions are often unknown.
• Developing high-throughput screening (HTS) assays for these targets is challenging due to limited biochemical data.

Purpose of the Study:

• To present a method for screening antibacterial drug targets with unknown functions.
• To utilize phage display-derived peptides as surrogate ligands in competition assays.
• To enable the screening of small-molecule libraries against novel microbial targets.

Main Methods:

• Employing phage display to isolate peptides that bind to potential drug targets.
• Using these peptides as surrogate ligands in competition-based HTS assays.
• Adapting assays for various detection methods, including radioactivity, luminescence, and fluorescence.

Main Results:

• Phage display peptides effectively serve as surrogate ligands for screening targets of unknown function.
• Competition assays enable the screening of small-molecule libraries against these targets.
• The described HTS assay formats are adaptable and versatile.

Conclusions:

• Phage display offers a viable strategy to overcome challenges in screening novel antibacterial targets.
• This approach facilitates the discovery of new antibiotics against drug-resistant and opportunistic pathogens.
• The method supports the development of diverse HTS assays for a broad range of targets.