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Crystal structure of a tridecameric superhelix
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details in silico model Other ideal alpha-helix
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, SITTING DROP 3.5 298 2M ammonium sulfate,
5-10% glycerol,
0.1 M citric acid pH 3.5
Crystal Properties Matthews coefficient Solvent content 4.34 71.63
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 95.869 α = 90 b = 37.784 β = 96.84 c = 101.43 γ = 90
Symmetry Space Group C 1 2 1
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 2006-11-17 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON SLS BEAMLINE X10SA 0.9722 SLS X10SA
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 1.82 45.2 97.5 0.05 15.1 4.1 32046 25.4
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 1.82 1.89 93.1 0.558 3 3.6
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) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION MOLECULAR REPLACEMENT FREE R-VALUE ideal alpha-helix 1.82 45.158 1.34 32008 1605 97.42 0.1866 0.1849 0.191 0.2176 0.2208 random 48.7
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 12.656 f_angle_d 1.525 f_chiral_restr 0.08 f_bond_d 0.012 f_plane_restr 0.005
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 1495 Nucleic Acid Atoms Solvent Atoms 127 Heterogen Atoms 497
Software Software Software Name Purpose DENZO data reduction PHENIX refinement Coot model building Arcimboldo phasing SADABS data scaling