title: Resolution-enhanced base-type-edited HCN experiment for RNA.
abstract: New base-type-edited transverse-relaxation optimized CT-HCN(C) experiments are presented that yield intra-base and sugar-to-base correlations for 13C-15N labeled RNA. High spectral resolution in the 13C and 15N dimensions is achieved by constant time (CT) frequency editing. A spectral editing filter applied during the CT 15N labeling period separates the correlation peaks arising from G/U and A/C nucleotide bases. This provides the increased spectral resolution required to unambiguously connect the 1H and 13C resonances in sugar and base moieties of RNA nucleotides. In addition, the experiment allows base type identification for each residue, and therefore presents an attractive spectroscopic alternative to nucleotide-specific isotope labeling. Application to a 33-nucleotide RNA aptamer demonstrates the performance of the new pulse scheme.
authors.affiliation: Laboratoire de RMN, Institut de Biologie Structurale--Jean-Pierre Ebel, UMR, 5075 CNRS-CEA-UJF, 41, rue Jules Horowitz, 38027, Cedex, Grenoble, France.
authors.forename: Hélène
authors.initials: H
authors.lastname: Van Melckebeke
authors.forename: Arthur
authors.initials: A
authors.lastname: Pardi
authors.forename: Jérôme
authors.initials: J
authors.lastname: Boisbouvier
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Simorre
authors.forename: Bernhard
authors.initials: B
authors.lastname: Brutscher
mesh_terms: D002247:Carbon Isotopes; D006859:Hydrogen; D008958:Models, Molecular; D009587:Nitrogen Isotopes; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods*; D009690:Nucleic Acid Conformation; D012313:RNA / Q000737:chemistry*
chemical_list: D002247:Carbon Isotopes; D009587:Nitrogen Isotopes; D012313:RNA; D006859:Hydrogen