Molecular docking and simulation studies of flavonoid compounds against PBP-2a of methicillin-resistant...

Area of Science:

• Biochemistry
• Pharmacology
• Computational Chemistry

Background:

• Methicillin-Resistant Staphylococcus aureus (MRSA) is a significant global health threat due to its resistance to conventional antibiotics.
• The emergence of MRSA as a 'superbug' necessitates the development of novel therapeutic strategies.
• Plant-derived compounds offer a potential source for new antimicrobial agents.

Purpose of the Study:

• To identify potent flavonoid inhibitors targeting Penicillin Binding Protein-2a (PBP-2a) in MRSA.
• To evaluate the binding affinities and interactions of selected flavonoids with MRSA PBP-2a.
• To assess the therapeutic potential of natural flavonoids as adjuvant antimicrobial agents.

Main Methods:

• Screening of 186 flavonoid compounds using molecular docking simulations (PyRx, GOLD suite).
• Analysis of binding interactions between flavonoids and MRSA PBP-2a amino acid residues.
• Validation of top-ranked compounds through 30 ns molecular dynamics (MD) simulations and ADME/T analysis.

Main Results:

• Several flavonoids demonstrated strong binding affinities and significant interactions with MRSA PBP-2a.
• Molecular dynamics simulations confirmed the stability and efficacy of top candidates: Naringin, Hesperidin, Neohesperidin, Didymin, and Icariin.
• ADME/T analysis indicated that these flavonoid inhibitors are likely safe for therapeutic use.

Conclusions:

• Natural flavonoids represent a promising and accessible resource for developing novel therapies against antibiotic-resistant MRSA strains.
• These findings support the use of flavonoids as adjuvant antimicrobial agents in combating MRSA infections.
• Further research into these plant-derived compounds could lead to effective strategies against superbug threats.