Interactions of omeprazole-based analogues with cytochrome P450 2C19: a computational study

Area of Science:

• Pharmacology
• Biochemistry
• Computational Chemistry

Background:

• Cytochrome P450 2C19 (CYP2C19) is a crucial human drug-metabolizing enzyme, processing approximately 7-10% of clinical drugs.
• Omeprazole-based analogues have emerged as potent CYP2C19 inhibitors, valuable for studying enzyme selectivity.
• The precise binding interactions of these analogues with CYP2C19 require detailed elucidation.

Purpose of the Study:

• To systematically investigate the binding modes and interactions between omeprazole-based analogues and CYP2C19.
• To analyze the influence of active site water molecules on the binding energy predictions.
• To provide insights for the rational design of novel CYP2C19 inhibitors.

Main Methods:

• Utilized a combination of molecular docking, molecular dynamics (MD) simulations, and MM/GBSA calculations.
• Analyzed the detailed binding modes of the omeprazole analogues within the CYP2C19 active site.
• Evaluated the impact of explicit active site water molecules on binding free energy calculations.

Main Results:

• The study elucidated the specific binding interactions between the omeprazole analogues and CYP2C19.
• Inclusion of explicit active site water molecules improved binding energy prediction, particularly when forming hydrogen bond networks.
• The effect of water molecules on binding free energy was found to be dependent on the ligand's binding mode.

Conclusions:

• The research successfully unraveled the interaction mechanisms of omeprazole-based analogues with CYP2C19.
• Active site water molecules play a significant role in accurately predicting binding energies.
• Findings can guide the future design of more effective CYP2C19 inhibitors with enhanced metabolic profiles.