Download MendeleyEnzymatic Synthesis of Acyclic Nucleoside Thiophosphonate Diphosphates: Effect of the Alpha-Phosphorus Configuration on HIV-1 RT Activity.
Priet, S., Roux, L., Saez-Ayala, M., Ferron, F., Canard, B., Alvarez, K.(2015) Antiviral Res 117: 122
- PubMed: 25766862
- DOI: https://doi.org/10.1016/j.antiviral.2015.03.003
- Primary Citation of Related Structures:
4C6A, 4CP5 - PubMed Abstract:
The acyclic nucleosides thiophosphonates (9-[2-(thiophosphonomethoxy)ethyl]adenine (S-PMEA) and (R)-9-[2-(thiophosphonomethoxy)propyl]adenine (S-PMPA), exhibit antiviral activity against HIV-1, -2 and HBV. Their diphosphate forms S-PMEApp and S-PMPApp, synthesized as stereoisomeric mixture, are potent inhibitors of wild-type (WT) HIV-1 RT. Understanding HIV-1 RT stereoselectivity, however, awaits resolution of the diphosphate forms into defined stereoisomers. To this aim, thiophosphonate monophosphates S-PMEAp and S-PMPAp were synthesized and used in a stereocontrolled enzyme-catalyzed phosphoryl transfer reaction involving either nucleoside diphosphate kinase (NDPK) or creatine kinase (CK) to obtain thiophosphonate diphosphates as separated isomers. We then quantified substrate preference of recombinant WT HIV-1 RT toward pure stereoisomers using in vitro steady-state kinetic analyses. The crystal structure of a complex between Dictyostelium NDPK and S-PMPApp at 2.32Å allowed to determine the absolute configuration at the α-phosphorus atom in relation to the stereo-preference of studied enzymes. The RP isomer of S-PMPApp and S-PMEApp are the preferred substrate over SP for both NDPK and HIV-1 RT.
Organizational Affiliation:
Laboratoire d'Architecture et Fonction des Macromolécules Biologiques, UMR CNRS 7257, Team "Viral Replicases: Structure, Mechanism and Drug-Design", Université Aix-Marseille, Parc scientifique de Luminy, 163 av. de Luminy, 13288 Marseille Cedex 9, France.
