Computational Insights into 1,4-Naphthoquinones as Allosteric MEK1 Inhibitors for Cancer Therapy

Area of Science:

• Medicinal Chemistry
• Computational Biology
• Pharmacology

Background:

• Mitogen-activated protein kinase kinase 1 (MEK1) is crucial for cell survival and proliferation, and its dysregulation is linked to various cancers.
• Targeting MEK1 is a key therapeutic strategy in oncology.
• 1,4-Naphthoquinones are natural compounds with demonstrated anticancer potential.

Purpose of the Study:

• To virtually screen a library of 1,4-naphthoquinones for potential allosteric inhibition of MEK1.
• To identify promising MEK1 inhibitors for further preclinical investigation.

Main Methods:

• Virtual screening of a 1,4-naphthoquinone library using molecular docking against MEK1.
• Analysis of binding affinity, poses, and interactions for selected compounds.
• Molecular dynamics (MD) simulations for the top-ranked compound.
• Absorption, Distribution, Metabolism, Excretion, and Toxicity (ADMET) predictions for hit prioritization.

Main Results:

• Ten 1,4-naphthoquinones exhibited strong binding affinities to MEK1, engaging key residues like Asp-190 and Phe-209.
• MD simulations confirmed stable binding of the top candidate.
• Similar scaffolds displayed comparable binding energies and interactions.
• ADMET predictions refined the selection process.

Conclusions:

• The virtual screening protocol effectively enriched for potential MEK1 inhibitors.
• 1,4-Naphthoquinones may act via a similar mechanism to the native MEK1 inhibitor.
• Five 1,4-naphthoquinones were identified as promising MEK1 inhibitors, providing a computational basis for future research.