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Crystal structure of Type I restriction enzyme EcoKI M protein (EC 2.1.1.72) (M.EcoKI)
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model Other SAD model built based on an experimental map
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 8.25 291 2.15M (NH2)2SO4, 0.1M Na Citrate, pH 8.25, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Crystal Properties Matthews coefficient Solvent content 3.17 60.86
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 105.427 α = 90 b = 105.427 β = 90 c = 138.279 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 CCD MARRESEARCH Focussing mirrors down stream of monochromator 2004-03-17 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON APS BEAMLINE 31-ID 0.975 APS 31-ID
Data Collection Overall ID # Resolution (High) Resolution (Low) Percent Possible (Observed) R Sym 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 2.8 30 96.6 0.113 8.6 2.22 70488 70488 -3 35
Highest Resolution Shell ID # Resolution (High) Resolution (Low) Percent Possible (All) Percent Possible (Observed) R-Sym I (Observed) Mean I Over Sigma (Observed) Redundancy Number Unique Reflections (All) 2.8 2.9 95.7 0.551 7016
Refinement Statistics Diffraction ID Structure Solution Method Cross Validation method 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) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION SAD THROUGHOUT 2.8 19.81 69603 3415 95.3 0.224 0.224 0.2236 0.261 0.26 RANDOM 43.4
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] -0.44 -0.44 0.89
RMS Deviations Key Refinement Restraint Deviation c_dihedral_angle_d 22.5 c_scangle_it 3.34 c_mcangle_it 2.51 c_scbond_it 2.06 c_mcbond_it 1.43 c_angle_deg 1.2 c_improper_angle_d 0.74 c_bond_d 0.009
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 7675 Nucleic Acid Atoms Solvent Atoms 143 Heterogen Atoms 10
Software Software Software Name Purpose DENZO data reduction SCALEPACK data scaling SOLVE phasing CNS refinement