How does stress affect human being-a molecular dynamic simulation study on cortisol and its glucocorticoid receptor

Area of Science:

• Biochemistry
• Molecular Biology
• Pharmacology

Background:

• Stress impacts human mental and physical health, with links to illness.
• Cortisol binds to the glucocorticoid receptor, a key component of the stress response.
• The atomic-level structure-function relationship between cortisol and its receptor is not fully understood.

Purpose of the Study:

• To elucidate the atomic-level structure-function relationships between cortisol and the glucocorticoid receptor.
• To identify key molecular interactions governing cortisol-glucocorticoid receptor binding.
• To provide insights for developing drugs targeting stress-related conditions.

Main Methods:

• Molecular dynamic (MD) simulations were performed on the glucocorticoid receptor (Apo system) and the cortisol-glucocorticoid receptor complex (HCY system).
• Analysis of simulation trajectories to identify critical residues involved in ligand binding.
• Binding free energy calculations to validate simulation results.

Main Results:

• Key residues essential for cortisol binding to the glucocorticoid receptor were identified through MD simulations.
• Binding free energy calculations showed good agreement with experimental data.
• Detailed atomic-level insights into the structural basis of cortisol-receptor interaction were obtained.

Conclusions:

• The study provides a clear, atomic-level understanding of the structural-functional aspects of cortisol-glucocorticoid receptor interactions.
• Identified key residues offer potential targets for drug design.
• Findings contribute valuable information for developing novel therapeutics for stress-related illnesses.