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Crystal structure of Staphylococcal nuclease variant V23L/L25V/V66I/I72V at cryogenic temperature
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 1SNC PDB ENTRY 1SNC
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 8 277 30% MPD, 25 mM potassium phosphate, calcium chloride, pdTp, pH 8.0, vapor diffusion, hanging drop, temperature 277K
Crystal Properties Matthews coefficient Solvent content 2.12 41.86
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 47.64 α = 90 b = 47.64 β = 90 c = 62.806 γ = 90
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 Meridionally-bent fused silica mirror with palladium and uncoated stripes vertically-focusing at 6.6:1 demagnification 2011-09-25 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON NSLS BEAMLINE X25 0.9790 NSLS X25
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 1.55 50 99.9 0.034 26.2 12.6 20413 20413 31.7
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 1.55 1.58 99.6 0.195 13.8 10 1005
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model Resolution (High) Resolution (Low) Number Reflections (All) Number Reflections (Observed) Number Reflections (R-Free) Percent Reflections (Observed) R-Factor (All) R-Factor (Observed) R-Work (Depositor) R-Free (Depositor) R-Free (DCC) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT THROUGHOUT PDB ENTRY 1SNC 1.55 47.64 20389 20389 1045 99.89 0.1786 0.1786 0.1766 0.2188 0.2403 RANDOM 27.8364
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] 0.59 0.59 -1.18
RMS Deviations Key Refinement Restraint Deviation r_dihedral_angle_2_deg 33.537 r_dihedral_angle_3_deg 16.466 r_dihedral_angle_4_deg 11.884 r_dihedral_angle_1_deg 6.488 r_angle_refined_deg 1.996 r_chiral_restr 0.144 r_bond_refined_d 0.019 r_gen_planes_refined 0.015
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 1060 Nucleic Acid Atoms Solvent Atoms 96 Heterogen Atoms 39
Software Software Software Name Purpose SCALEPACK data scaling PHASER phasing REFMAC refinement PDB_EXTRACT data extraction CBASS data collection HKL-2000 data reduction