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Structural analysis shows the mode of inhibition for Staphylococcus aureus lipase by antipsychotic penfluridol
Julia Kitadokoro1, Takatsugu Hirokawa2,3, Masayuki Kamo4
1Faculty of Molecular Chemistry and Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Hashigami-cho, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan.
Abstract:
It is now well-established that Staphylococcus aureus can produce a range of toxin proteins, resulting in a spectrum of pathological conditions when it infects individuals with pre-existing medical conditions or immunocompromised. Among these, MRSA is one of the most prominent antimicrobial-resistant organisms and a significant cause of mortality in many patients. It has been demonstrated that Staphylococcus aureus lipase (SAL) is a vital factor in the proliferation of this bacterium. A combination of in silico screening and X-ray crystallography was employed to analyze inhibitors of SAL, and the results were highly significant. In silico screening identified a number of compounds, and the enzyme activity assay demonstrated that the antipsychotic drug penfluridol exhibited potent inhibitory activity against SAL. We have conducted co-crystallization of penfluridol and SAL on the ground and in space. The resulting co-crystals were subjected to data measurement using the synchrotron radiation facility at SPring-8, and the complex structure was determined. The crystal structure of the penfluridol-SAL complex was determined at 2.2 Å resolution, thereby providing the structural basis for developing new anti-infective agents that inhibit the growth of Staphylococcus aureus. These findings are anticipated to facilitate the development of compounds with potent inhibitory activity.
Insights
Researchers identified penfluridol as a potent inhibitor of Staphylococcus aureus lipase (SAL), a key factor in bacterial proliferation. This discovery, confirmed by crystal structure analysis, offers a new avenue for developing anti-infective agents against Staphylococcus aureus.
Area of Science:
- Microbiology
- Structural Biology
- Pharmacology
Background:
- Staphylococcus aureus, particularly Methicillin-resistant Staphylococcus aureus (MRSA), is a significant cause of mortality, often linked to its toxin proteins.
- Staphylococcus aureus lipase (SAL) is a crucial factor in the proliferation of this bacterium.
- Developing novel inhibitors for bacterial virulence factors is essential for combating antimicrobial resistance.
Purpose of the Study:
- To identify and characterize inhibitors of Staphylococcus aureus lipase (SAL).
- To provide a structural basis for the development of new anti-infective agents targeting Staphylococcus aureus.
Main Methods:
- In silico screening was used to identify potential SAL inhibitors.
- Enzyme activity assays were performed to evaluate the inhibitory potential of identified compounds.
- Co-crystallization of SAL with inhibitors was conducted, followed by X-ray crystallography for structural determination at SPring-8.
Main Results:
- In silico screening identified several compounds with potential inhibitory activity against SAL.
- The antipsychotic drug penfluridol demonstrated potent inhibition of SAL enzyme activity.
- The crystal structure of the penfluridol-SAL complex was determined at 2.2 Å resolution, revealing the binding interaction.
Conclusions:
- Penfluridol is a potent inhibitor of Staphylococcus aureus lipase (SAL).
- The determined crystal structure provides a structural foundation for designing novel anti-infective agents.
- These findings may accelerate the development of new strategies to combat Staphylococcus aureus infections.
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