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The X-ray crystal structure of a parallel poly(rA) double helix generated by rA7 at acidic pH
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 4JRD rA2 section of the 4JRD
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 3.5 293.15 rA7 dissolved in water to 10 mM and was diluted 1/10 v/v in 0.75% PEG 1000. One uL of this was mixed with 1 uL of the following reservoir solution: (0.24 M ammonium sulfate and 0.06 M citric acid pH 3.5) to generate a hanging drop over 1 mL of this reservoir solution.
Crystal Properties Matthews coefficient Solvent content 1.33 8
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 21.253 α = 90 b = 21.253 β = 90 c = 14.946 γ = 90
Symmetry Space Group P 42 21 2
Diffraction Diffraction Experiment ID # Crystal ID Scattering Type Data Collection Temperature Detector Detector Type Details Collection Date Monochromator Protocol 1 1 x-ray 100 PIXEL DECTRIS PILATUS 6M 2015-03-22 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SSRL BEAMLINE BL12-2 0.95530 SSRL BL12-2
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Merge I (Observed) Rpim I (All) CC (Half) 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 1.069 21.25 97.6 0.127 0.032 0.994 15 19.3 1679
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R Merge I (Observed) Rpim I (All) CC (Half) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 1.069 1.14 87.2 1.059 0.333 0.987 3.1 8.9 247
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) 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 MOLECULAR REPLACEMENT FREE R-VALUE rA2 section of the 4JRD 1.069 15.028 1619 146 94.84 0.1063 0.1061 0.1088 0.108 0.1135
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]
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms Nucleic Acid Atoms 44 Solvent Atoms 8 Heterogen Atoms 1
Software Software Software Name Purpose PHENIX refinement XDS data reduction Aimless data scaling PHENIX phasing