Design of novel HIV-1 protease inhibitors incorporating isophthalamide-derived P2-P3 ligands: Synthesis, biological evaluation and X-ray structural studies of inhibitor-HIV-1 protease complex.
Ghosh, A.K., Brindisi, M., Nyalapatla, P.R., Takayama, J., Ella-Menye, J.R., Yashchuk, S., Agniswamy, J., Wang, Y.F., Aoki, M., Amano, M., Weber, I.T., Mitsuya, H.(2017) Bioorg Med Chem 25: 5114-5127
- PubMed: 28434781 
- DOI: https://doi.org/10.1016/j.bmc.2017.04.005
- Primary Citation of Related Structures:  
5UOV, 5UPZ - PubMed Abstract: 
Based upon molecular insights from the X-ray structures of inhibitor-bound HIV-1 protease complexes, we have designed a series of isophthalamide-derived inhibitors incorporating substituted pyrrolidines, piperidines and thiazolidines as P2-P3 ligands for specific interactions in the S2-S3 extended site. Compound 4b has shown an enzyme K i of 0.025nM and antiviral IC 50 of 69nM. An X-ray crystal structure of inhibitor 4b-HIV-1 protease complex was determined at 1.33Å resolution. We have also determined X-ray structure of 3b-bound HIV-1 protease at 1.27Å resolution. These structures revealed important molecular insight into the inhibitor-HIV-1 protease interactions in the active site.
Organizational Affiliation: 
Department of Chemistry and Department of Medicinal Chemistry, Purdue University, West Lafayette, IN 47907, USA. Electronic address: akghosh@purdue.edu.