Small molecules targeting LapB protein prevent Listeria attachment to catfish muscle

Area of Science:

• Food microbiology
• Biochemistry
• Drug discovery

Background:

• Listeria monocytogenes is a dangerous Gram-positive foodborne pathogen causing listeriosis.
• The L. monocytogenes lapB gene encodes a cell wall surface anchor protein crucial for virulence.
• Previous studies showed lapB mutations attenuate Listeria in mice.

Purpose of the Study:

• To investigate the role of Listeria LapB protein in catfish fillet attachment.
• To develop and test boron-based small molecules targeting L. monocytogenes LapB.
• To assess the efficacy of these molecules in preventing bacterial attachment to fish fillets.

Main Methods:

• Development of boron-based small molecules designed to inhibit the L. monocytogenes LapB active site.
• Testing the ability of these small molecules to prevent L. monocytogenes attachment to catfish fillets.
• Evaluating the effectiveness of nine different small molecules in reducing bacterial adhesion.

Main Results:

• Seven out of nine tested small molecules significantly reduced Listeria attachment to catfish fillets.
• Three small molecules (SM3, SM5, and SM7) demonstrated high efficacy in blocking bacterial attachment.
• The study identified specific boron-based compounds with potential anti-adhesion properties.

Conclusions:

• Listeria LapB protein plays a role in bacterial attachment to fish fillets.
• Boron-based small molecules targeting LapB offer a promising strategy for reducing L. monocytogenes contamination.
• This approach could lead to improved safety measures for fresh and frozen fish products.