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Structure of an engineered helicase domain construct for human Bloom syndrome protein (BLM)
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 4O3M
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 6.5 277.15 Morpheus HT-96, Condition C9, Molecular Dimensions.
0.09 M NPS, 0.1M Buffer System, 30% Precipitant Mix 1
NPS = 0.3 M sodium nitrate, 0.3 M sodium phosphate dibasic, 0.3 M ammonium sulphate
Buffer System 1 = 1.0 M imidazole, MES monohydrate (acid) pH 6.5
60% Precipitant Mix 1 = 40% v/v PEG 500 MME, 20% w/v PEG 20000
Crystal Properties Matthews coefficient Solvent content 2.84 56.72
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 84.916 α = 72.64 b = 111.709 β = 80.18 c = 132.344 γ = 79.22
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 PILATUS3 6M 2017-01-30 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON DIAMOND BEAMLINE I03 0.97623 Diamond I03
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 2.96 47.28 98 0.99 7.8 2.6 91662 77.78
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 2.97 3.07 94.5 0.57 1.4
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method Starting model 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 MOLECULAR REPLACEMENT THROUGHOUT 4O3M 2.96 47.28 1.97 91661 4641 97.63 0.2311 0.2291 0.2328 0.269 0.2724 92.4605
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 23153 Nucleic Acid Atoms 1590 Solvent Atoms 66 Heterogen Atoms 427
Software Software Software Name Purpose PHENIX refinement Aimless data reduction XDS data scaling PHASER phasing