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X-RAY STRUCTURE OF THE NUCLEOSOME CORE PARTICLE AT 2.5 A RESOLUTION
Starting Model(s) Initial Refinement Model(s) Type Source Accession Code Details experimental model PDB 2HIO 2HIO, 1AOI experimental model PDB 1AOI 2HIO, 1AOI
Crystallization Crystalization Experiments ID Method pH Temperature Details 1 VAPOR DIFFUSION, HANGING DROP 6 pH 6.0, VAPOR DIFFUSION, HANGING DROP
Crystal Properties Matthews coefficient Solvent content 2.62 53.06
Crystal Data Unit Cell Length ( Å ) Angle ( ˚ ) a = 105.28 α = 90 b = 109.71 β = 90 c = 181.12 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 IMAGE PLATE MARRESEARCH 1996-04-18 M SINGLE WAVELENGTH
Radiation Source ID # Source Type Wavelength List Synchrotron Site Beamline 1 SYNCHROTRON NSLS BEAMLINE X12C NSLS X12C
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 2.5 25.4 98.7 0.053 8.3 73319 73319 42.7
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 (Observed) R-Work (Depositor) R-Free (Depositor) R-Free Selection Details Mean Isotropic B X-RAY DIFFRACTION SIR, MR THROUGHOUT 2HIO, 1AOI 2.5 25.34 72200 72200 7303 98.6 0.219 0.219 0.282 RANDOM 53.2
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] 5.98 -5.53 -0.45
RMS Deviations Key Refinement Restraint Deviation c_dihedral_angle_d 20.5 c_scangle_it 5.98 c_mcangle_it 4.96 c_scbond_it 4.68 c_mcbond_it 3.64 c_angle_deg 1.6 c_improper_angle_d 1.33 c_bond_d 0.013 c_bond_d_na c_bond_d_prot
RMS Deviations Key Refinement Restraint Deviation c_dihedral_angle_d 20.5 c_scangle_it 5.98 c_mcangle_it 4.96 c_scbond_it 4.68 c_mcbond_it 3.64 c_angle_deg 1.6 c_improper_angle_d 1.33 c_bond_d 0.013 c_bond_d_na c_bond_d_prot c_angle_d c_angle_d_na c_angle_d_prot c_angle_deg_na c_angle_deg_prot c_dihedral_angle_d_na c_dihedral_angle_d_prot c_improper_angle_d_na c_improper_angle_d_prot
Non-Hydrogen Atoms Used in Refinement Non-Hydrogen Atoms Number Protein Atoms 6906 Nucleic Acid Atoms 5988 Solvent Atoms 349 Heterogen Atoms 29
Software Software Software Name Purpose SCALEPACK data scaling CCP4 model building CNS refinement CCP4 phasing CNS phasing