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Two divalent metal ions and conformational changes play roles in the hammerhead ribozyme cleavage reaction-WT ribozyme in Mn2+ at low pH
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 293 33 % MPD, 0.4 M potassium chloride, 50 mM potassium acetate pH 5.0, 10 mM MgCl2 and 0.5mM spermine
Crystal Properties Matthews coefficient Solvent content 4.09 69.94
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 80.169 α = 90 b = 85.923 β = 90 c = 104.258 γ = 90
Symmetry Space Group C 2 2 21
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 MARMOSAIC 300 mm CCD 2013-11-12 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON APS BEAMLINE 21-ID-D 1.5011 APS 21-ID-D
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 2.94 50 99.8 0.076 36.9 14.2 14606 14606
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 2.94 2.99 100 7.7 37.9
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 FREE R-VALUE 2.948 28.215 1.35 14432 1446 98.4 0.2118 0.2094 0.2073 0.233 0.2237
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 10.735 f_angle_d 0.388 f_chiral_restr 0.022 f_plane_restr 0.002 f_bond_d 0.001
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms Nucleic Acid Atoms 1455 Solvent Atoms Heterogen Atoms 11
Software Software Software Name Purpose PHENIX refinement HKL-2000 data reduction HKL-2000 data scaling PHENIX phasing