Docking-based CoMFA and CoMSIA studies on naphthyl-substituted diarylpyrimidines as NNRTIs

Area of Science:

• Medicinal Chemistry
• Computational Chemistry
• Drug Discovery

Background:

• Non-nucleoside reverse transcriptase inhibitors (NNRTIs) are crucial in developing anti-HIV therapies.
• Naphthyl-substituted diarylpyrimidines exhibit potent NNRTI activity with nanomolar EC50 values.
• Quantitative structure-activity relationship (QSAR) studies are essential for rational drug design and lead optimization.

Purpose of the Study:

• To establish QSAR models for naphthyl-substituted diarylpyrimidines to guide lead optimization.
• To investigate the structure-activity relationships of these compounds as NNRTIs.
• To identify key structural features contributing to anti-HIV activity.

Main Methods:

• Comparative Molecular Field Analysis (CoMFA) and Comparative Molecular Similarity Indices Analysis (CoMSIA) were employed.
• Molecular docking studies using the co-crystallized complex (PDB ID: 3MEC) were performed for molecular alignment.
• Multiple models were generated by exploring different field combinations and molecular alignments.

Main Results:

• Highly predictive CoMFA and CoMSIA models were developed, with the best CoMSIA model showing q(2) of 0.713 and r(2) of 0.969.
• Statistical validation yielded excellent predictive performance, with external test sets achieving r(2) values of 0.85 for CoMFA and 0.83 for CoMSIA.
• Contour maps from the models highlighted critical structural determinants for NNRTI activity.

Conclusions:

• The developed QSAR models effectively describe the structure-activity relationships of naphthyl-substituted diarylpyrimidines as NNRTIs.
• These models offer valuable insights and rational guidance for the future optimization of novel anti-HIV drug candidates.
• The study successfully demonstrates the utility of CoMFA and CoMSIA in accelerating the design of potent HIV therapeutics.