| Literature DB >> 28217261 |
Antonios Drakopoulos1, Christina Tzitzoglaki1, Chulong Ma2, Kathrin Freudenberger3, Anja Hoffmann4, Yanmei Hu2, Günter Gauglitz3, Michaela Schmidtke4, Jun Wang2, Antonios Kolocouris1.
Abstract
Recent findings from solid state NMR (ssNMR) studies suggested that the (R)-enantiomer of rimantadine binds to the full M2 protein with higher affinity than the (S)-enantiomer. Intrigued by these findings, we applied functional assays, such as antiviral assay and electrophysiology (EP), to evaluate the binding affinity of rimantadine enantiomers to the M2 protein channel. Unexpectedly, no significant difference was found between the two enantiomers. Our experimental data based on the full M2 protein function were further supported by alchemical free energy calculations and isothermal titration calorimetry (ITC) allowing an evaluation of the binding affinity of rimantadine enantiomers to the M2TM pore. Both enantiomers have similar channel blockage, affinity, and antiviral potency.Entities:
Keywords: Bennett’s acceptance ratio; Rimantadine enantiomers; antiviral assay; electrophysiology; free energy perturbation; influenza M2 pore; isothermal titration calorimetry; membrane protein; synthesis
Year: 2017 PMID: 28217261 PMCID: PMC5312807 DOI: 10.1021/acsmedchemlett.6b00311
Source DB: PubMed Journal: ACS Med Chem Lett ISSN: 1948-5875 Impact factor: 4.345