Thursday, October 26, 2023

Covalent and noncovalent strategies for targeting Lys102 in HIV-1 reverse transcriptase

Giavana R. Prucha, Sean Henry, Klarissa Hollander, Zachary J. Carter, Krasimir A. Spasov, William L. Jorgensen, Karen S. Anderson,

European Journal of Medicinal Chemistry, 2023, 262, 115894, 

https://doi.org/10.1016/j.ejmech.2023.115894

Reverse transcriptase (RT) is one of three key proteins responsible for the replication cycle of HIV-1 in the host. Several classes of inhibitors have been developed to target the enzyme, with non-nucleoside reverse transcriptase inhibitors forming first-line treatment. Previously, covalent RT inhibitors have been identified and found to bind irreversibly to commonly mutated residues such as Y181C. In this work we aim to circumvent the issue of NNRTI resistance through targeting K102, which has not yet been identified to confer drug resistance. As reported here, 34 compounds were synthesized and characterized biochemically and structurally with wild-type (WT) HIV-1 RT. Two of these inhibitors demonstrate covalent inhibition as evidenced by protein crystallography, enzyme kinetics, mass spectrometry, and antiviral potency in HIV-1 infected human T-cell assays.


Discovery of a Tunable Heterocyclic Electrophile 4-Chloro-pyrazolopyridine That Defines a Unique Subset of Ligandable Cysteines

Hong-Rae Kim, David P. Byun, Kalyani Thakur, Jennifer Ritchie, Yixin Xie, Ronald Holewinski, Kiall F. Suazo, Mckayla Stevens, Hope Liechty, ...