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Atomic resolution crystal structure of double-stranded RNA 32 base pairs long determined from random starting phases angles in the presence of pseudo translational symmetry using the direct methods program SIR2014.
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 6.5 293 Lithium sulfate, magnesium chloride, cacodylate
Crystal Properties Matthews coefficient Solvent content 2.31 46.81
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 42.89 α = 90 b = 42.89 β = 90 c = 266.936 γ = 120
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 100 CCD ADSC QUANTUM 315r 2009-05-10 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SSRL BEAMLINE BL7-1 0.97 SSRL BL7-1
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) Net I Over Average Sigma (I) Redundancy Number Reflections (All) Number Reflections (Observed) Observed Criterion Sigma (F) Observed Criterion Sigma (I) B (Isotropic) From Wilson Plot 1 1.05 36.79 99.6 0.053 20.1 4 44942 10.6
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R Merge I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 1.05 1.11 99.5 0.369 3.8 8.1
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Resolution (High) Resolution (Low) Cut-off Sigma (F) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (Observed) R-Work (Depositor) R-Work (DCC) R-Free (Depositor) R-Free (DCC) Mean Isotropic B X-RAY DIFFRACTION AB INITIO PHASING FREE R-VALUE 1.05 36.789 1.35 44941 2337 99.6 0.1301 0.1286 0.1315 0.1568 0.158
Temperature Factor Modeling Anisotropic B[1][1] Anisotropic B[1][2] Anisotropic B[1][3] Anisotropic B[2][2] Anisotropic B[2][3] Anisotropic B[3][3]
RMS Deviations Key Refinement Restraint Deviation f_dihedral_angle_d 6.261 f_angle_d 1.038 f_chiral_restr 0.039 f_plane_restr 0.018 f_bond_d 0.005
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms Nucleic Acid Atoms 675 Solvent Atoms 236 Heterogen Atoms 1
Software Software Software Name Purpose PHENIX refinement iMOSFLM data reduction SCALA data scaling Sir2014 phasing Coot model building Blu-Ice data collection