Inhibition of bacterial FMN transferase: A potential avenue for countering antimicrobial resistance

Area of Science:

• Microbiology
• Biochemistry
• Drug Discovery

Background:

• Antibiotic resistance poses a significant threat to managing bacterial infections.
• The FMN-transferase enzyme (Ftp) from Treponema pallidum (Ftp_Tp) is a potential antimicrobial target, unique to prokaryotes and trypanosomatids.
• Ftp_Tp modifies periplasmic proteins crucial for the electrochemical gradient, making its inhibition a promising therapeutic strategy.

Purpose of the Study:

• To investigate adenine-based nucleosides as potential inhibitors of Ftp_Tp.
• To explore the 2-position of the purine ring for enhanced inhibitory activity.
• To lay the groundwork for developing novel antibacterial agents targeting Ftp_Tp.

Main Methods:

• Structural and solution studies were employed.
• Inhibitory and enzyme-binding properties of adenine nucleosides were examined.
• Focus was placed on the 2-position of the purine ring in nucleoside analogs.

Main Results:

• Adenosine monophosphate (AMP) was identified as both a product and an inhibitor of Ftp_Tp.
• Several adenine-based nucleosides demonstrated inhibitory and binding capabilities.
• The 2-position of the purine ring was highlighted for its role in enzyme interaction.

Conclusions:

• Ftp_Tp inhibitors represent a potential new class of antimicrobials.
• Adenine nucleosides, particularly modified at the 2-position, show promise for Ftp_Tp inhibitor development.
• Further drug design efforts can leverage these findings to combat bacterial infections.