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Crystal structures and ribonuclease activity of the Flavivirus host factor ERI3 that is involved in viral RNA synthesis define the ERI subfamily of structure-specific 3-prime - 5-prime exoribonucleases
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 2XRI
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 290 35% PEG 3350,
20% saturated KCl,
200 mM Imidazole / Malate buffer pH 8.0,
5mM MnCl2,
18mM AMP,
3.3 mM N-{2-[4-(thiophen-2-yl)-1H-imidazol-2-yl]ethyl}-2,3-dihydro-1,4-benzodioxine-2-carboxamide (from Life Chemicals)
Crystal Properties Matthews coefficient Solvent content 2.11 41.64
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 58.555 α = 90 b = 74.639 β = 90 c = 96.709 γ = 90
Symmetry Space Group P 21 21 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 PIXEL DECTRIS PILATUS 6M 2021-01-11 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SSRL BEAMLINE BL9-2 0.97946 SSRL BL9-2
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) 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 1.85 37.32 99.6 0.999 18.16 6.54 240157 39.56
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) CC (Half) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 1 1.85 1.96 0.679
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 2XRI 1.85 37.32 62650 3156 89.79 0.1802 0.1789 0.1804 0.2051 0.2082 57.81
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 16.0963 f_angle_d 0.794 f_chiral_restr 0.0495 f_bond_d 0.0051 f_plane_restr 0.0051
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 3222 Nucleic Acid Atoms Solvent Atoms 158 Heterogen Atoms 56
Software Software Software Name Purpose PHENIX refinement XDS data reduction XDS data scaling PHASER phasing