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Solution structure of U2 snRNA stem I from human, containing modified nucleotides
NMR Experiment Experiment Type Sample Contents Solvent Ionic Strength pH Pressure Temperature (K) Spectrometer 1 2D NOESY 0.5 mM RNA; 50 mM NaCl; 90% H2O, 10% D2O 90% H2O/10% D2O 50 mM NaCl 7.0 ambient 283 2 2D NOESY 0.5 mM RNA; 50 mM NaCl; 99.99% D2O 99.99% D2O 50 mM NaCl 7.0 ambient 303 3 2D TOCSY 0.5 mM RNA; 50 mM NaCl; 99.99% D2O 99.99% D2O 50 mM NaCl 7.0 ambient 303 4 2D 13C-1H HSQC 0.5 mM RNA; 50 mM NaCl; 99.99% D2O 99.99% D2O 50 mM NaCl 7.0 ambient 303
NMR Spectrometer Information Spectrometer Manufacturer Model Field Strength 1 Bruker DMX 750
NMR Refinement Method Details Software simulated annealing
molecular dynamics
torsion angle dynamics CNS
NMR Ensemble Information Conformer Selection Criteria structures with the lowest energy Conformers Calculated Total Number 100 Conformers Submitted Total Number 20 Representative Model 1 (lowest energy)
Additional NMR Experimental Information Details This structure was determined using standard 2D NOESY, 2D TOCSY, and natural 13C abundance 2D HSQC.
Computation: NMR Software # Classification Version Software Name Author 1 structure solution CNS 1.1 Brunger, Adams, Clore, Delano, Gros, Grossekunstleve, Jiang, Kuszewski, Nilges, Pannu, Read, Rice, Simonson, Warren 2 refinement X-PLOR 2.11.0 Schwieters, Kuszewski, Tjzndra, Clore