title: Synthesis and stereospecificity of 4,5-disubstituted oxazolidinone ligands binding to T-box riboswitch RNA.
abstract: The enantiomers and the cis isomers of two previously studied 4,5-disubstituted oxazolidinones have been synthesized, and their binding to the T-box riboswitch antiterminator model RNA has been investigated in detail. Characterization of ligand affinities and binding site localization indicates that there is little stereospecific discrimination for binding antiterminator RNA alone. This binding similarity between enantiomers is likely due to surface binding, which accommodates ligand conformations that result in comparable ligand-antiterminator contacts. These results have significant implications for T-box antiterminator-targeted drug discovery and, in general, for targeting other medicinally relevant RNA that do not present deep binding pockets.
authors.affiliation: Department of Chemistry and Biochemistry, Ohio University, Athens, Ohio 45701, United States.
authors.forename: Crina M
authors.initials: CM
authors.lastname: Orac
authors.forename: Shu
authors.initials: S
authors.lastname: Zhou
authors.forename: John A
authors.initials: JA
authors.lastname: Means
authors.forename: David
authors.initials: D
authors.lastname: Boehm
authors.forename: Stephen C
authors.initials: SC
authors.lastname: Bergmeier
authors.forename: Jennifer V
authors.initials: JV
authors.lastname: Hines
mesh_terms: D001665:Binding Sites; D031541:Fluorescence Resonance Energy Transfer; D008024:Ligands; D008958:Models, Molecular; D023303:Oxazolidinones / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D058928:Riboswitch / Q000187:drug effects*; D013237:Stereoisomerism; D013329:Structure-Activity Relationship
chemical_list: D008024:Ligands; D023303:Oxazolidinones; D058928:Riboswitch