Crystal Structure of HIV-1 reverse transcriptase (RT) in complex with the alkenyldiarylmethane (ADAM) Non-nucleoside RT Inhibitor (E)-S-Methyl 5-(1-(3,7-Dimethyl-2-oxo-2,3-dihydrobenzo[d]oxazol-5-yl)-5-(5-methyl-1,3,4-oxadiazol-2-yl)pent-1-enyl)-2-methoxy-3-methylbenzothioate.Cullen, M.D., Ho, W.C., Bauman, J.D., Das, K., Arnold, E., Hartman, T.L., Watson, K.M., Buckheit, R.W., Pannecouque, C., De Clercq, E., Cushman, M.
(2009) J.Med.Chem. 52: 6467-6473
- PubMed: 19775161
- DOI: 10.1021/jm901167t
- Primary Citation of Related Structures:
- PubMed Abstract:
Two crystal structures have been solved for separate complexes of alkenyldiarylmethane (ADAM) nonnucleoside reverse transcriptase inhibitors (NNRTI) 3 and 4 with HIV-1 reverse transcriptase (RT). The structures reveal inhibitor binding is exclusively ...
Two crystal structures have been solved for separate complexes of alkenyldiarylmethane (ADAM) nonnucleoside reverse transcriptase inhibitors (NNRTI) 3 and 4 with HIV-1 reverse transcriptase (RT). The structures reveal inhibitor binding is exclusively hydrophobic in nature and the shape of the inhibitor-bound NNRTI binding pocket is unique among other reported inhibitor-RT crystal structures. Primarily, ADAMs 3 and 4 protrude from a large gap in the back side of the binding pocket, placing portions of the inhibitors unusually close to the polymerase active site and allowing 3 to form a weak hydrogen bond with Lys223. The lack of additional stabilizing interactions, beyond the observed hydrophobic surface contacts, between 4 and RT is quite perplexing given the extreme potency of the compound (IC(50) = 1 nM). ADAM 4 was designed to be hydrolytically stable in blood plasma, and an investigation of its hydrolysis in rat plasma demonstrated it has a significantly prolonged half-life in comparison to ADAM lead compounds 1 and 2.
Department of Medicinal Chemistry and Molecular Pharmacology, School of Pharmacy and Pharmaceutical Sciences, and Purdue University Center for Cancer Research, Purdue University, West Lafayette, Indiana 47907, USA.